aboutsummaryrefslogtreecommitdiff
path: root/libjava/libltdl/ltdl.c
diff options
context:
space:
mode:
Diffstat (limited to 'libjava/libltdl/ltdl.c')
-rw-r--r--libjava/libltdl/ltdl.c5534
1 files changed, 4018 insertions, 1516 deletions
diff --git a/libjava/libltdl/ltdl.c b/libjava/libltdl/ltdl.c
index 5ecbee5d2cb..40ed84d417a 100644
--- a/libjava/libltdl/ltdl.c
+++ b/libjava/libltdl/ltdl.c
@@ -25,333 +25,1145 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
*/
-#define _LTDL_COMPILE_
-
#if HAVE_CONFIG_H
-#include <config.h>
+# include <config.h>
#endif
-#if HAVE_STRING_H
-#include <string.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if HAVE_STDIO_H
+# include <stdio.h>
+#endif
+
+#if HAVE_STDLIB_H
+# include <stdlib.h>
#endif
-#if HAVE_STRINGS_H
-#include <strings.h>
+#if HAVE_STRING_H
+# include <string.h>
+#else
+# if HAVE_STRINGS_H
+# include <strings.h>
+# endif
#endif
#if HAVE_CTYPE_H
-#include <ctype.h>
+# include <ctype.h>
#endif
#if HAVE_MALLOC_H
-#include <malloc.h>
+# include <malloc.h>
#endif
#if HAVE_MEMORY_H
-#include <memory.h>
-#endif
-
-#if HAVE_STDLIB_H
-#include <stdlib.h>
+# include <memory.h>
#endif
-#if HAVE_STDIO_H
-#include <stdio.h>
+#if HAVE_ERRNO_H
+# include <errno.h>
#endif
#if HAVE_BOEHM_GC
#include <gc.h>
#endif
-#include "ltdl.h"
-#ifdef DLL_EXPORT
-# define LTDL_GLOBAL_DATA __declspec(dllexport)
+#ifndef __WINDOWS__
+# ifdef __WIN32__
+# define __WINDOWS__
+# endif
+#endif
+
+
+#undef LT_USE_POSIX_DIRENT
+#ifdef HAVE_CLOSEDIR
+# ifdef HAVE_OPENDIR
+# ifdef HAVE_READDIR
+# ifdef HAVE_DIRENT_H
+# define LT_USE_POSIX_DIRENT
+# endif /* HAVE_DIRENT_H */
+# endif /* HAVE_READDIR */
+# endif /* HAVE_OPENDIR */
+#endif /* HAVE_CLOSEDIR */
+
+
+#undef LT_USE_WINDOWS_DIRENT_EMULATION
+#ifndef LT_USE_POSIX_DIRENT
+# ifdef __WINDOWS__
+# define LT_USE_WINDOWS_DIRENT_EMULATION
+# endif /* __WINDOWS__ */
+#endif /* LT_USE_POSIX_DIRENT */
+
+
+#ifdef LT_USE_POSIX_DIRENT
+# include <dirent.h>
+# define LT_D_NAMLEN(dirent) (strlen((dirent)->d_name))
#else
-# define LTDL_GLOBAL_DATA
+# ifdef LT_USE_WINDOWS_DIRENT_EMULATION
+# define LT_D_NAMLEN(dirent) (strlen((dirent)->d_name))
+# else
+# define dirent direct
+# define LT_D_NAMLEN(dirent) ((dirent)->d_namlen)
+# if HAVE_SYS_NDIR_H
+# include <sys/ndir.h>
+# endif
+# if HAVE_SYS_DIR_H
+# include <sys/dir.h>
+# endif
+# if HAVE_NDIR_H
+# include <ndir.h>
+# endif
+# endif
#endif
-/* max. filename length */
-#ifndef LTDL_FILENAME_MAX
-#define LTDL_FILENAME_MAX 1024
+#if HAVE_ARGZ_H
+# include <argz.h>
#endif
-#undef LTDL_READTEXT_MODE
-/* fopen() mode flags for reading a text file */
-#ifdef _WIN32
-#define LTDL_READTEXT_MODE "rt"
+#if HAVE_ASSERT_H
+# include <assert.h>
#else
-#define LTDL_READTEXT_MODE "r"
+# define assert(arg) ((void) 0)
#endif
-#undef LTDL_SYMBOL_LENGTH
-/* This is the maximum symbol size that won't require malloc/free */
-#define LTDL_SYMBOL_LENGTH 128
+#include "ltdl.h"
-#undef LTDL_SYMBOL_OVERHEAD
-/* This accounts for the _LTX_ separator */
-#define LTDL_SYMBOL_OVERHEAD 5
-
-/* NOTE: typedefed in ltdl.h
- This structure is used for the list of registered loaders. */
-struct lt_dlloader_t {
- struct lt_dlloader_t *next;
- const char *loader_name; /* identifying name for each loader */
- const char *sym_prefix; /* prefix for symbols */
- lt_module_open_t *module_open;
- lt_module_close_t *module_close;
- lt_find_sym_t *find_sym;
- lt_dlloader_exit_t *dlloader_exit;
- lt_dlloader_data_t dlloader_data;
-};
+#if WITH_DMALLOC
+# include <dmalloc.h>
+#endif
-typedef struct lt_dlhandle_t {
- struct lt_dlhandle_t *next;
- lt_dlloader_t *loader; /* dlopening interface */
- lt_dlinfo info;
- int depcount; /* number of dependencies */
- lt_dlhandle *deplibs; /* dependencies */
- lt_module_t module; /* system module handle */
- lt_ptr_t system; /* system specific data */
- lt_ptr_t app_private; /* application private data */
-} lt_dlhandle_t;
-
-static const char objdir[] = LTDL_OBJDIR;
-#ifdef LTDL_SHLIB_EXT
-static const char shlib_ext[] = LTDL_SHLIB_EXT;
+
+
+
+/* --- WINDOWS SUPPORT --- */
+
+
+#ifdef DLL_EXPORT
+# define LT_GLOBAL_DATA __declspec(dllexport)
+#else
+# define LT_GLOBAL_DATA
#endif
-#ifdef LTDL_SYSSEARCHPATH
-static const char sys_search_path[] = LTDL_SYSSEARCHPATH;
+
+/* fopen() mode flags for reading a text file */
+#undef LT_READTEXT_MODE
+#ifdef __WINDOWS__
+# define LT_READTEXT_MODE "rt"
+#else
+# define LT_READTEXT_MODE "r"
#endif
-/* Extract the diagnostic strings from the error table macro in the same
- order as the enumberated indices in ltdl.h. */
-#define LTDL_ERROR(name, diagnostic) (diagnostic),
-static const char *ltdl_error_strings[] = {
- ltdl_error_table
- 0
+#ifdef LT_USE_WINDOWS_DIRENT_EMULATION
+
+#include <windows.h>
+
+#define dirent lt_dirent
+#define DIR lt_DIR
+
+struct dirent
+{
+ char d_name[2048];
+ int d_namlen;
};
-#undef LTDL_ERROR
-#ifdef __STDC__
-# define LT_DLSTRERROR(name) ltdl_error_strings[LTDL_ERROR_##name]
+typedef struct _DIR
+{
+ HANDLE hSearch;
+ WIN32_FIND_DATA Win32FindData;
+ BOOL firsttime;
+ struct dirent file_info;
+} DIR;
+
+#endif /* LT_USE_WINDOWS_DIRENT_EMULATION */
+
+
+/* --- MANIFEST CONSTANTS --- */
+
+
+/* Standard libltdl search path environment variable name */
+#undef LTDL_SEARCHPATH_VAR
+#define LTDL_SEARCHPATH_VAR "LTDL_LIBRARY_PATH"
+
+/* Standard libtool archive file extension. */
+#undef LTDL_ARCHIVE_EXT
+#define LTDL_ARCHIVE_EXT ".la"
+
+/* max. filename length */
+#ifndef LT_FILENAME_MAX
+# define LT_FILENAME_MAX 1024
+#endif
+
+/* This is the maximum symbol size that won't require malloc/free */
+#undef LT_SYMBOL_LENGTH
+#define LT_SYMBOL_LENGTH 128
+
+/* This accounts for the _LTX_ separator */
+#undef LT_SYMBOL_OVERHEAD
+#define LT_SYMBOL_OVERHEAD 5
+
+
+
+
+/* --- MEMORY HANDLING --- */
+
+
+/* These are the functions used internally. In addition to making
+ use of the associated function pointers above, they also perform
+ error handling. */
+static char *lt_estrdup LT_PARAMS((const char *str));
+static lt_ptr lt_emalloc LT_PARAMS((size_t size));
+static lt_ptr lt_erealloc LT_PARAMS((lt_ptr addr, size_t size));
+
+/* static lt_ptr rpl_realloc LT_PARAMS((lt_ptr ptr, size_t size)); */
+#define rpl_realloc realloc
+
+/* These are the pointers that can be changed by the caller: */
+LT_GLOBAL_DATA lt_ptr (*lt_dlmalloc) LT_PARAMS((size_t size))
+ = (lt_ptr (*) LT_PARAMS((size_t))) malloc;
+LT_GLOBAL_DATA lt_ptr (*lt_dlrealloc) LT_PARAMS((lt_ptr ptr, size_t size))
+ = (lt_ptr (*) LT_PARAMS((lt_ptr, size_t))) rpl_realloc;
+LT_GLOBAL_DATA void (*lt_dlfree) LT_PARAMS((lt_ptr ptr))
+ = (void (*) LT_PARAMS((lt_ptr))) free;
+
+/* The following macros reduce the amount of typing needed to cast
+ assigned memory. */
+#if WITH_DMALLOC
+
+#define LT_DLMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp)))
+#define LT_DLREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp)))
+#define LT_DLFREE(p) \
+ LT_STMT_START { if (p) (p) = (xfree (p), (lt_ptr) 0); } LT_STMT_END
+
+#define LT_EMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp)))
+#define LT_EREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp)))
+
#else
-# define LT_DLSTRERROR(name) ltdl_error_strings[LTDL_ERROR_/**/name]
+
+#define LT_DLMALLOC(tp, n) ((tp *) lt_dlmalloc ((n) * sizeof(tp)))
+#define LT_DLREALLOC(tp, p, n) ((tp *) rpl_realloc ((p), (n) * sizeof(tp)))
+#define LT_DLFREE(p) \
+ LT_STMT_START { if (p) (p) = (lt_dlfree (p), (lt_ptr) 0); } LT_STMT_END
+
+#define LT_EMALLOC(tp, n) ((tp *) lt_emalloc ((n) * sizeof(tp)))
+#define LT_EREALLOC(tp, p, n) ((tp *) lt_erealloc ((p), (n) * sizeof(tp)))
+
#endif
-static const char *last_error = 0;
+#define LT_DLMEM_REASSIGN(p, q) LT_STMT_START { \
+ if ((p) != (q)) { if (p) lt_dlfree (p); (p) = (q); (q) = 0; } \
+ } LT_STMT_END
+
+
+/* --- REPLACEMENT FUNCTIONS --- */
-LTDL_GLOBAL_DATA lt_ptr_t (*lt_dlmalloc) LTDL_PARAMS((size_t size)) = (lt_ptr_t(*)LTDL_PARAMS((size_t)))malloc;
-LTDL_GLOBAL_DATA void (*lt_dlfree) LTDL_PARAMS((lt_ptr_t ptr)) = (void(*)LTDL_PARAMS((lt_ptr_t)))free;
#undef strdup
-#define strdup xstrdup
+#define strdup rpl_strdup
+
+static char *strdup LT_PARAMS((const char *str));
-static inline char *
+static char *
strdup(str)
- const char *str;
+ const char *str;
{
- char *tmp;
+ char *tmp = 0;
+
+ if (str)
+ {
+ tmp = LT_DLMALLOC (char, 1+ strlen (str));
+ if (tmp)
+ {
+ strcpy(tmp, str);
+ }
+ }
- if (!str)
- return 0;
- tmp = (char*) lt_dlmalloc(strlen(str)+1);
- if (tmp)
- strcpy(tmp, str);
- return tmp;
+ return tmp;
}
+
#if ! HAVE_STRCMP
#undef strcmp
-#define strcmp xstrcmp
+#define strcmp rpl_strcmp
-static inline int
+static int strcmp LT_PARAMS((const char *str1, const char *str2));
+
+static int
strcmp (str1, str2)
- const char *str1;
- const char *str2;
-{
- if (str1 == str2)
- return 0;
- if (str1 == 0)
- return -1;
- if (str2 == 0)
- return 1;
-
- for (;*str1 && *str2; str1++, str2++)
- if (*str1 != *str2)
- break;
-
- return (int)(*str1 - *str2);
+ const char *str1;
+ const char *str2;
+{
+ if (str1 == str2)
+ return 0;
+ if (str1 == 0)
+ return -1;
+ if (str2 == 0)
+ return 1;
+
+ for (;*str1 && *str2; ++str1, ++str2)
+ {
+ if (*str1 != *str2)
+ break;
+ }
+
+ return (int)(*str1 - *str2);
}
#endif
-
+
#if ! HAVE_STRCHR
-# if HAVE_INDEX
+# if HAVE_INDEX
+# define strchr index
+# else
+# define strchr rpl_strchr
-# define strchr index
+static const char *strchr LT_PARAMS((const char *str, int ch));
-# else
+static const char*
+strchr(str, ch)
+ const char *str;
+ int ch;
+{
+ const char *p;
-# define strchr xstrchr
+ for (p = str; *p != (char)ch && *p != LT_EOS_CHAR; ++p)
+ /*NOWORK*/;
-static inline const char*
-strchr(str, ch)
- const char *str;
- int ch;
+ return (*p == (char)ch) ? p : 0;
+}
+
+# endif
+#endif /* !HAVE_STRCHR */
+
+
+#if ! HAVE_STRRCHR
+
+# if HAVE_RINDEX
+# define strrchr rindex
+# else
+# define strrchr rpl_strrchr
+
+static const char *strrchr LT_PARAMS((const char *str, int ch));
+
+static const char*
+strrchr(str, ch)
+ const char *str;
+ int ch;
{
- const char *p;
+ const char *p, *q = 0;
- for (p = str; *p != (char)ch && *p != '\0'; p++)
- /*NOWORK*/;
+ for (p = str; *p != LT_EOS_CHAR; ++p)
+ {
+ if (*p == (char) ch)
+ {
+ q = p;
+ }
+ }
- return (*p == (char)ch) ? p : 0;
+ return q;
}
# endif
+#endif
+
+/* NOTE: Neither bcopy nor the memcpy implementation below can
+ reliably handle copying in overlapping areas of memory. Use
+ memmove (for which there is a fallback implmentation below)
+ if you need that behaviour. */
+#if ! HAVE_MEMCPY
+
+# if HAVE_BCOPY
+# define memcpy(dest, src, size) bcopy (src, dest, size)
+# else
+# define memcpy rpl_memcpy
+
+static lt_ptr memcpy LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size));
+
+static lt_ptr
+memcpy (dest, src, size)
+ lt_ptr dest;
+ const lt_ptr src;
+ size_t size;
+{
+ size_t i = 0;
+
+ for (i = 0; i < size; ++i)
+ {
+ dest[i] = src[i];
+ }
+
+ return dest;
+}
+
+# endif /* !HAVE_BCOPY */
+#endif /* !HAVE_MEMCPY */
+
+#if ! HAVE_MEMMOVE
+# define memmove rpl_memmove
+
+static lt_ptr memmove LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size));
+
+static lt_ptr
+memmove (dest, src, size)
+ lt_ptr dest;
+ const lt_ptr src;
+ size_t size;
+{
+ size_t i;
+
+ if (dest < src)
+ for (i = 0; i < size; ++i)
+ {
+ dest[i] = src[i];
+ }
+ else if (dest > src)
+ for (i = size -1; i >= 0; --i)
+ {
+ dest[i] = src[i];
+ }
+
+ return dest;
+}
+
+#endif /* !HAVE_MEMMOVE */
+#ifdef LT_USE_WINDOWS_DIRENT_EMULATION
+
+static void closedir LT_PARAMS((DIR *entry));
+
+static void
+closedir(entry)
+ DIR *entry;
+{
+ assert(entry != (DIR *) NULL);
+ FindClose(entry->hSearch);
+ lt_dlfree((lt_ptr)entry);
+}
+
+
+static DIR * opendir LT_PARAMS((const char *path));
+
+static DIR*
+opendir (path)
+ const char *path;
+{
+ char file_specification[LT_FILENAME_MAX];
+ DIR *entry;
+
+ assert(path != (char *) NULL);
+ (void) strncpy(file_specification,path,LT_FILENAME_MAX-1);
+ (void) strcat(file_specification,"\\");
+ entry = LT_DLMALLOC (DIR,sizeof(DIR));
+ if (entry != (DIR *) 0)
+ {
+ entry->firsttime = TRUE;
+ entry->hSearch = FindFirstFile(file_specification,&entry->Win32FindData);
+ }
+ if (entry->hSearch == INVALID_HANDLE_VALUE)
+ {
+ (void) strcat(file_specification,"\\*.*");
+ entry->hSearch = FindFirstFile(file_specification,&entry->Win32FindData);
+ if (entry->hSearch == INVALID_HANDLE_VALUE)
+ {
+ LT_DLFREE (entry);
+ return (DIR *) 0;
+ }
+ }
+ return(entry);
+}
+
+
+static struct dirent *readdir LT_PARAMS((DIR *entry));
+
+static struct dirent *readdir(entry)
+ DIR *entry;
+{
+ int
+ status;
+
+ if (entry == (DIR *) 0)
+ return((struct dirent *) 0);
+ if (!entry->firsttime)
+ {
+ status = FindNextFile(entry->hSearch,&entry->Win32FindData);
+ if (status == 0)
+ return((struct dirent *) 0);
+ }
+ entry->firsttime = FALSE;
+ (void) strncpy(entry->file_info.d_name,entry->Win32FindData.cFileName,
+ LT_FILENAME_MAX-1);
+ entry->file_info.d_namlen = strlen(entry->file_info.d_name);
+ return(&entry->file_info);
+}
+
+#endif /* LT_USE_WINDOWS_DIRENT_EMULATION */
+
+/* According to Alexandre Oliva <oliva@lsd.ic.unicamp.br>,
+ ``realloc is not entirely portable''
+ In any case we want to use the allocator supplied by the user without
+ burdening them with an lt_dlrealloc function pointer to maintain.
+ Instead implement our own version (with known boundary conditions)
+ using lt_dlmalloc and lt_dlfree. */
+
+/* #undef realloc
+ #define realloc rpl_realloc
+*/
+#if 0
+ /* You can't (re)define realloc unless you also (re)define malloc.
+ Right now, this code uses the size of the *destination* to decide
+ how much to copy. That's not right, but you can't know the size
+ of the source unless you know enough about, or wrote malloc. So
+ this code is disabled... */
+
+static lt_ptr
+realloc (ptr, size)
+ lt_ptr ptr;
+ size_t size;
+{
+ if (size == 0)
+ {
+ /* For zero or less bytes, free the original memory */
+ if (ptr != 0)
+ {
+ lt_dlfree (ptr);
+ }
+
+ return (lt_ptr) 0;
+ }
+ else if (ptr == 0)
+ {
+ /* Allow reallocation of a NULL pointer. */
+ return lt_dlmalloc (size);
+ }
+ else
+ {
+ /* Allocate a new block, copy and free the old block. */
+ lt_ptr mem = lt_dlmalloc (size);
+
+ if (mem)
+ {
+ memcpy (mem, ptr, size);
+ lt_dlfree (ptr);
+ }
+
+ /* Note that the contents of PTR are not damaged if there is
+ insufficient memory to realloc. */
+ return mem;
+ }
+}
#endif
-#if ! HAVE_STRRCHR
-# if HAVE_RINDEX
+#if ! HAVE_ARGZ_APPEND
+# define argz_append rpl_argz_append
-# define strrchr rindex
+static error_t argz_append LT_PARAMS((char **pargz, size_t *pargz_len,
+ const char *buf, size_t buf_len));
-# else
+static error_t
+argz_append (pargz, pargz_len, buf, buf_len)
+ char **pargz;
+ size_t *pargz_len;
+ const char *buf;
+ size_t buf_len;
+{
+ size_t argz_len;
+ char *argz;
-# define strrchr xstrrchr
+ assert (pargz);
+ assert (pargz_len);
+ assert ((*pargz && *pargz_len) || (!*pargz && !*pargz_len));
-static inline const char*
-strrchr(str, ch)
- const char *str;
- int ch;
+ /* If nothing needs to be appended, no more work is required. */
+ if (buf_len == 0)
+ return 0;
+
+ /* Ensure there is enough room to append BUF_LEN. */
+ argz_len = *pargz_len + buf_len;
+ argz = LT_DLREALLOC (char, *pargz, argz_len);
+ if (!argz)
+ return ENOMEM;
+
+ /* Copy characters from BUF after terminating '\0' in ARGZ. */
+ memcpy (argz + *pargz_len, buf, buf_len);
+
+ /* Assign new values. */
+ *pargz = argz;
+ *pargz_len = argz_len;
+
+ return 0;
+}
+#endif /* !HAVE_ARGZ_APPEND */
+
+
+#if ! HAVE_ARGZ_CREATE_SEP
+# define argz_create_sep rpl_argz_create_sep
+
+static error_t argz_create_sep LT_PARAMS((const char *str, int delim,
+ char **pargz, size_t *pargz_len));
+
+static error_t
+argz_create_sep (str, delim, pargz, pargz_len)
+ const char *str;
+ int delim;
+ char **pargz;
+ size_t *pargz_len;
{
- const char *p;
+ size_t argz_len;
+ char *argz = 0;
+
+ assert (str);
+ assert (pargz);
+ assert (pargz_len);
+
+ /* Make a copy of STR, but replacing each occurence of
+ DELIM with '\0'. */
+ argz_len = 1+ LT_STRLEN (str);
+ if (argz_len)
+ {
+ const char *p;
+ char *q;
+
+ argz = LT_DLMALLOC (char, argz_len);
+ if (!argz)
+ return ENOMEM;
+
+ for (p = str, q = argz; *p != LT_EOS_CHAR; ++p)
+ {
+ if (*p == delim)
+ {
+ /* Ignore leading delimiters, and fold consecutive
+ delimiters in STR into a single '\0' in ARGZ. */
+ if ((q > argz) && (q[-1] != LT_EOS_CHAR))
+ *q++ = LT_EOS_CHAR;
+ else
+ --argz_len;
+ }
+ else
+ *q++ = *p;
+ }
+ /* Copy terminating LT_EOS_CHAR. */
+ *q = *p;
+ }
- for (p = str; *p != '\0'; p++)
- /*NOWORK*/;
+ /* If ARGZ_LEN has shrunk to nothing, release ARGZ's memory. */
+ if (!argz_len)
+ LT_DLFREE (argz);
- while (*p != (char)ch && p >= str)
- p--;
+ /* Assign new values. */
+ *pargz = argz;
+ *pargz_len = argz_len;
- return (*p == (char)ch) ? p : 0;
+ return 0;
}
+#endif /* !HAVE_ARGZ_CREATE_SEP */
+
+
+#if ! HAVE_ARGZ_INSERT
+# define argz_insert rpl_argz_insert
+
+static error_t argz_insert LT_PARAMS((char **pargz, size_t *pargz_len,
+ char *before, const char *entry));
+
+static error_t
+argz_insert (pargz, pargz_len, before, entry)
+ char **pargz;
+ size_t *pargz_len;
+ char *before;
+ const char *entry;
+{
+ assert (pargz);
+ assert (pargz_len);
+ assert (entry && *entry);
+
+ /* No BEFORE address indicates ENTRY should be inserted after the
+ current last element. */
+ if (!before)
+ return argz_append (pargz, pargz_len, entry, 1+ LT_STRLEN (entry));
+
+ /* This probably indicates a programmer error, but to preserve
+ semantics, scan back to the start of an entry if BEFORE points
+ into the middle of it. */
+ while ((before >= *pargz) && (before[-1] != LT_EOS_CHAR))
+ --before;
+
+ {
+ size_t entry_len = 1+ LT_STRLEN (entry);
+ size_t argz_len = *pargz_len + entry_len;
+ size_t offset = before - *pargz;
+ char *argz = LT_DLREALLOC (char, *pargz, argz_len);
+
+ if (!argz)
+ return ENOMEM;
+
+ /* Make BEFORE point to the equivalent offset in ARGZ that it
+ used to have in *PARGZ incase realloc() moved the block. */
+ before = argz + offset;
+
+ /* Move the ARGZ entries starting at BEFORE up into the new
+ space at the end -- making room to copy ENTRY into the
+ resulting gap. */
+ memmove (before + entry_len, before, *pargz_len - offset);
+ memcpy (before, entry, entry_len);
+
+ /* Assign new values. */
+ *pargz = argz;
+ *pargz_len = argz_len;
+ }
+
+ return 0;
+}
+#endif /* !HAVE_ARGZ_INSERT */
+
+
+#if ! HAVE_ARGZ_NEXT
+# define argz_next rpl_argz_next
+
+static char *argz_next LT_PARAMS((char *argz, size_t argz_len,
+ const char *entry));
+
+static char *
+argz_next (argz, argz_len, entry)
+ char *argz;
+ size_t argz_len;
+ const char *entry;
+{
+ assert ((argz && argz_len) || (!argz && !argz_len));
+
+ if (entry)
+ {
+ /* Either ARGZ/ARGZ_LEN is empty, or ENTRY points into an address
+ within the ARGZ vector. */
+ assert ((!argz && !argz_len)
+ || ((argz <= entry) && (entry < (argz + argz_len))));
+
+ /* Move to the char immediately after the terminating
+ '\0' of ENTRY. */
+ entry = 1+ strchr (entry, LT_EOS_CHAR);
+
+ /* Return either the new ENTRY, or else NULL if ARGZ is
+ exhausted. */
+ return (entry >= argz + argz_len) ? 0 : (char *) entry;
+ }
+ else
+ {
+ /* This should probably be flagged as a programmer error,
+ since starting an argz_next loop with the iterator set
+ to ARGZ is safer. To preserve semantics, handle the NULL
+ case by returning the start of ARGZ (if any). */
+ if (argz_len > 0)
+ return argz;
+ else
+ return 0;
+ }
+}
+#endif /* !HAVE_ARGZ_NEXT */
+
+
+
+#if ! HAVE_ARGZ_STRINGIFY
+# define argz_stringify rpl_argz_stringify
+
+static void argz_stringify LT_PARAMS((char *argz, size_t argz_len,
+ int sep));
+
+static void
+argz_stringify (argz, argz_len, sep)
+ char *argz;
+ size_t argz_len;
+ int sep;
+{
+ assert ((argz && argz_len) || (!argz && !argz_len));
+
+ if (sep)
+ {
+ --argz_len; /* don't stringify the terminating EOS */
+ while (--argz_len > 0)
+ {
+ if (argz[argz_len] == LT_EOS_CHAR)
+ argz[argz_len] = sep;
+ }
+ }
+}
+#endif /* !HAVE_ARGZ_STRINGIFY */
+
+
+
+
+/* --- TYPE DEFINITIONS -- */
-# endif
+/* This type is used for the array of caller data sets in each handler. */
+typedef struct {
+ lt_dlcaller_id key;
+ lt_ptr data;
+} lt_caller_data;
+
+
+
+
+/* --- OPAQUE STRUCTURES DECLARED IN LTDL.H --- */
+
+
+/* Extract the diagnostic strings from the error table macro in the same
+ order as the enumerated indices in ltdl.h. */
+
+static const char *lt_dlerror_strings[] =
+ {
+#define LT_ERROR(name, diagnostic) (diagnostic),
+ lt_dlerror_table
+#undef LT_ERROR
+
+ 0
+ };
+
+/* This structure is used for the list of registered loaders. */
+struct lt_dlloader {
+ struct lt_dlloader *next;
+ const char *loader_name; /* identifying name for each loader */
+ const char *sym_prefix; /* prefix for symbols */
+ lt_module_open *module_open;
+ lt_module_close *module_close;
+ lt_find_sym *find_sym;
+ lt_dlloader_exit *dlloader_exit;
+ lt_user_data dlloader_data;
+};
+
+struct lt_dlhandle_struct {
+ struct lt_dlhandle_struct *next;
+ lt_dlloader *loader; /* dlopening interface */
+ lt_dlinfo info;
+ int depcount; /* number of dependencies */
+ lt_dlhandle *deplibs; /* dependencies */
+ lt_module module; /* system module handle */
+ lt_ptr system; /* system specific data */
+ lt_caller_data *caller_data; /* per caller associated data */
+ int flags; /* various boolean stats */
+};
+
+/* Various boolean flags can be stored in the flags field of an
+ lt_dlhandle_struct... */
+#define LT_DLGET_FLAG(handle, flag) (((handle)->flags & (flag)) == (flag))
+#define LT_DLSET_FLAG(handle, flag) ((handle)->flags |= (flag))
+
+#define LT_DLRESIDENT_FLAG (0x01 << 0)
+/* ...add more flags here... */
+
+#define LT_DLIS_RESIDENT(handle) LT_DLGET_FLAG(handle, LT_DLRESIDENT_FLAG)
+
+
+#define LT_DLSTRERROR(name) lt_dlerror_strings[LT_CONC(LT_ERROR_,name)]
+
+static const char objdir[] = LTDL_OBJDIR;
+static const char archive_ext[] = LTDL_ARCHIVE_EXT;
+#ifdef LTDL_SHLIB_EXT
+static const char shlib_ext[] = LTDL_SHLIB_EXT;
+#endif
+#ifdef LTDL_SYSSEARCHPATH
+static const char sys_search_path[] = LTDL_SYSSEARCHPATH;
#endif
-/* The Cygwin dlopen implementation prints a spurious error message to
- stderr if its call to LoadLibrary() fails for any reason. We can
- mitigate this by not using the Cygwin implementation, and falling
- back to our own LoadLibrary() wrapper. */
-#if HAVE_LIBDL && !defined(__CYGWIN__)
+
+
+
+/* --- MUTEX LOCKING --- */
+
+
+/* Macros to make it easier to run the lock functions only if they have
+ been registered. The reason for the complicated lock macro is to
+ ensure that the stored error message from the last error is not
+ accidentally erased if the current function doesn't generate an
+ error of its own. */
+#define LT_DLMUTEX_LOCK() LT_STMT_START { \
+ if (lt_dlmutex_lock_func) (*lt_dlmutex_lock_func)(); \
+ } LT_STMT_END
+#define LT_DLMUTEX_UNLOCK() LT_STMT_START { \
+ if (lt_dlmutex_unlock_func) (*lt_dlmutex_unlock_func)();\
+ } LT_STMT_END
+#define LT_DLMUTEX_SETERROR(errormsg) LT_STMT_START { \
+ if (lt_dlmutex_seterror_func) \
+ (*lt_dlmutex_seterror_func) (errormsg); \
+ else lt_dllast_error = (errormsg); } LT_STMT_END
+#define LT_DLMUTEX_GETERROR(errormsg) LT_STMT_START { \
+ if (lt_dlmutex_seterror_func) \
+ (errormsg) = (*lt_dlmutex_geterror_func) (); \
+ else (errormsg) = lt_dllast_error; } LT_STMT_END
+
+/* The mutex functions stored here are global, and are necessarily the
+ same for all threads that wish to share access to libltdl. */
+static lt_dlmutex_lock *lt_dlmutex_lock_func = 0;
+static lt_dlmutex_unlock *lt_dlmutex_unlock_func = 0;
+static lt_dlmutex_seterror *lt_dlmutex_seterror_func = 0;
+static lt_dlmutex_geterror *lt_dlmutex_geterror_func = 0;
+static const char *lt_dllast_error = 0;
+
+
+/* Either set or reset the mutex functions. Either all the arguments must
+ be valid functions, or else all can be NULL to turn off locking entirely.
+ The registered functions should be manipulating a static global lock
+ from the lock() and unlock() callbacks, which needs to be reentrant. */
+int
+lt_dlmutex_register (lock, unlock, seterror, geterror)
+ lt_dlmutex_lock *lock;
+ lt_dlmutex_unlock *unlock;
+ lt_dlmutex_seterror *seterror;
+ lt_dlmutex_geterror *geterror;
+{
+ lt_dlmutex_unlock *old_unlock = unlock;
+ int errors = 0;
+
+ /* Lock using the old lock() callback, if any. */
+ LT_DLMUTEX_LOCK ();
+
+ if ((lock && unlock && seterror && geterror)
+ || !(lock || unlock || seterror || geterror))
+ {
+ lt_dlmutex_lock_func = lock;
+ lt_dlmutex_unlock_func = unlock;
+ lt_dlmutex_geterror_func = geterror;
+ }
+ else
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_MUTEX_ARGS));
+ ++errors;
+ }
+
+ /* Use the old unlock() callback we saved earlier, if any. Otherwise
+ record any errors using internal storage. */
+ if (old_unlock)
+ (*old_unlock) ();
+
+ /* Return the number of errors encountered during the execution of
+ this function. */
+ return errors;
+}
+
+
+
+
+/* --- ERROR HANDLING --- */
+
+
+static const char **user_error_strings = 0;
+static int errorcount = LT_ERROR_MAX;
+
+int
+lt_dladderror (diagnostic)
+ const char *diagnostic;
+{
+ int errindex = 0;
+ int result = -1;
+ const char **temp = (const char **) 0;
+
+ assert (diagnostic);
+
+ LT_DLMUTEX_LOCK ();
+
+ errindex = errorcount - LT_ERROR_MAX;
+ temp = LT_EREALLOC (const char *, user_error_strings, 1 + errindex);
+ if (temp)
+ {
+ user_error_strings = temp;
+ user_error_strings[errindex] = diagnostic;
+ result = errorcount++;
+ }
+
+ LT_DLMUTEX_UNLOCK ();
+
+ return result;
+}
+
+int
+lt_dlseterror (errindex)
+ int errindex;
+{
+ int errors = 0;
+
+ LT_DLMUTEX_LOCK ();
+
+ if (errindex >= errorcount || errindex < 0)
+ {
+ /* Ack! Error setting the error message! */
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_ERRORCODE));
+ ++errors;
+ }
+ else if (errindex < LT_ERROR_MAX)
+ {
+ /* No error setting the error message! */
+ LT_DLMUTEX_SETERROR (lt_dlerror_strings[errindex]);
+ }
+ else
+ {
+ /* No error setting the error message! */
+ LT_DLMUTEX_SETERROR (user_error_strings[errindex - LT_ERROR_MAX]);
+ }
+
+ LT_DLMUTEX_UNLOCK ();
+
+ return errors;
+}
+
+static lt_ptr
+lt_emalloc (size)
+ size_t size;
+{
+ lt_ptr mem = lt_dlmalloc (size);
+ if (size && !mem)
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
+ return mem;
+}
+
+static lt_ptr
+lt_erealloc (addr, size)
+ lt_ptr addr;
+ size_t size;
+{
+ lt_ptr mem = realloc (addr, size);
+ if (size && !mem)
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
+ return mem;
+}
+
+static char *
+lt_estrdup (str)
+ const char *str;
+{
+ char *copy = strdup (str);
+ if (LT_STRLEN (str) && !copy)
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
+ return copy;
+}
+
+
+
+
+/* --- DLOPEN() INTERFACE LOADER --- */
+
+
+#if HAVE_LIBDL
/* dynamic linking with dlopen/dlsym */
#if HAVE_DLFCN_H
-# include <dlfcn.h>
+# include <dlfcn.h>
+#endif
+
+#if HAVE_SYS_DL_H
+# include <sys/dl.h>
#endif
#ifdef RTLD_GLOBAL
-# define LTDL_GLOBAL RTLD_GLOBAL
+# define LT_GLOBAL RTLD_GLOBAL
#else
-# ifdef DL_GLOBAL
-# define LTDL_GLOBAL DL_GLOBAL
-# else
-# define LTDL_GLOBAL 0
-# endif
-#endif
+# ifdef DL_GLOBAL
+# define LT_GLOBAL DL_GLOBAL
+# endif
+#endif /* !RTLD_GLOBAL */
+#ifndef LT_GLOBAL
+# define LT_GLOBAL 0
+#endif /* !LT_GLOBAL */
-/* We may have to define LTDL_LAZY_OR_NOW in the command line if we
+/* We may have to define LT_LAZY_OR_NOW in the command line if we
find out it does not work in some platform. */
-#ifndef LTDL_LAZY_OR_NOW
-# ifdef RTLD_LAZY
-# define LTDL_LAZY_OR_NOW RTLD_LAZY
-# else
-# ifdef DL_LAZY
-# define LTDL_LAZY_OR_NOW DL_LAZY
+#ifndef LT_LAZY_OR_NOW
+# ifdef RTLD_LAZY
+# define LT_LAZY_OR_NOW RTLD_LAZY
+# else
+# ifdef DL_LAZY
+# define LT_LAZY_OR_NOW DL_LAZY
+# endif
+# endif /* !RTLD_LAZY */
+#endif
+#ifndef LT_LAZY_OR_NOW
+# ifdef RTLD_NOW
+# define LT_LAZY_OR_NOW RTLD_NOW
# else
-# ifdef RTLD_NOW
-# define LTDL_LAZY_OR_NOW RTLD_NOW
-# else
# ifdef DL_NOW
-# define LTDL_LAZY_OR_NOW DL_NOW
-# else
-# define LTDL_LAZY_OR_NOW 0
+# define LT_LAZY_OR_NOW DL_NOW
# endif
-# endif
-# endif
-# endif
+# endif /* !RTLD_NOW */
#endif
+#ifndef LT_LAZY_OR_NOW
+# define LT_LAZY_OR_NOW 0
+#endif /* !LT_LAZY_OR_NOW */
-static lt_module_t
-sys_dl_open (loader_data, filename)
- lt_dlloader_data_t loader_data;
- const char *filename;
-{
- lt_module_t module = dlopen(filename, LTDL_GLOBAL | LTDL_LAZY_OR_NOW);
- if (!module) {
#if HAVE_DLERROR
- last_error = dlerror();
+# define DLERROR(arg) dlerror ()
#else
- last_error = LT_DLSTRERROR(CANNOT_OPEN);
+# define DLERROR(arg) LT_DLSTRERROR (arg)
#endif
- }
- return module;
+
+static lt_module
+sys_dl_open (loader_data, filename)
+ lt_user_data loader_data;
+ const char *filename;
+{
+ lt_module module = dlopen (filename, LT_GLOBAL | LT_LAZY_OR_NOW);
+
+ if (!module)
+ {
+ LT_DLMUTEX_SETERROR (DLERROR (CANNOT_OPEN));
+ }
+
+ return module;
}
static int
sys_dl_close (loader_data, module)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
+ lt_user_data loader_data;
+ lt_module module;
{
- if (dlclose(module) != 0) {
-#if HAVE_DLERROR
- last_error = dlerror();
-#else
- last_error = LT_DLSTRERROR(CANNOT_CLOSE);
-#endif
- return 1;
- }
- return 0;
+ int errors = 0;
+
+ if (dlclose (module) != 0)
+ {
+ LT_DLMUTEX_SETERROR (DLERROR (CANNOT_CLOSE));
+ ++errors;
+ }
+
+ return errors;
}
-static lt_ptr_t
+static lt_ptr
sys_dl_sym (loader_data, module, symbol)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
- const char *symbol;
+ lt_user_data loader_data;
+ lt_module module;
+ const char *symbol;
{
- lt_ptr_t address = dlsym(module, symbol);
-
- if (!address)
-#if HAVE_DLERROR
- last_error = dlerror();
-#else
- last_error = LT_DLSTRERROR(SYMBOL_NOT_FOUND);
-#endif
- return address;
+ lt_ptr address = dlsym (module, symbol);
+
+ if (!address)
+ {
+ LT_DLMUTEX_SETERROR (DLERROR (SYMBOL_NOT_FOUND));
+ }
+
+ return address;
}
-static struct lt_user_dlloader sys_dl = {
+static struct lt_user_dlloader sys_dl =
+ {
# ifdef NEED_USCORE
- "_",
+ "_",
# else
- 0,
+ 0,
# endif
- sys_dl_open, sys_dl_close, sys_dl_sym, 0, 0 };
-#endif
+ sys_dl_open, sys_dl_close, sys_dl_sym, 0, 0 };
+
+
+#endif /* HAVE_LIBDL */
+
+
+
+/* --- SHL_LOAD() INTERFACE LOADER --- */
#if HAVE_SHL_LOAD
/* dynamic linking with shl_load (HP-UX) (comments from gmodule) */
#ifdef HAVE_DL_H
-#include <dl.h>
+# include <dl.h>
#endif
/* some flags are missing on some systems, so we provide
@@ -362,82 +1174,125 @@ static struct lt_user_dlloader sys_dl = {
* BIND_DEFERRED - Delay code symbol resolution until actual reference.
*
* Optionally:
- * BIND_FIRST - Place the library at the head of the symbol search order.
- * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all unsatisfied
- * symbols as fatal. This flag allows binding of unsatisfied code
- * symbols to be deferred until use.
- * [Perl: For certain libraries, like DCE, deferred binding often
- * causes run time problems. Adding BIND_NONFATAL to BIND_IMMEDIATE
- * still allows unresolved references in situations like this.]
- * BIND_NOSTART - Do not call the initializer for the shared library when the
- * library is loaded, nor on a future call to shl_unload().
- * BIND_VERBOSE - Print verbose messages concerning possible unsatisfied symbols.
+ * BIND_FIRST - Place the library at the head of the symbol search
+ * order.
+ * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all
+ * unsatisfied symbols as fatal. This flag allows
+ * binding of unsatisfied code symbols to be deferred
+ * until use.
+ * [Perl: For certain libraries, like DCE, deferred
+ * binding often causes run time problems. Adding
+ * BIND_NONFATAL to BIND_IMMEDIATE still allows
+ * unresolved references in situations like this.]
+ * BIND_NOSTART - Do not call the initializer for the shared library
+ * when the library is loaded, nor on a future call to
+ * shl_unload().
+ * BIND_VERBOSE - Print verbose messages concerning possible
+ * unsatisfied symbols.
*
* hp9000s700/hp9000s800:
- * BIND_RESTRICTED - Restrict symbols visible by the library to those present at
- * library load time.
- * DYNAMIC_PATH - Allow the loader to dynamically search for the library specified
- * by the path argument.
+ * BIND_RESTRICTED - Restrict symbols visible by the library to those
+ * present at library load time.
+ * DYNAMIC_PATH - Allow the loader to dynamically search for the
+ * library specified by the path argument.
*/
#ifndef DYNAMIC_PATH
-#define DYNAMIC_PATH 0
-#endif /* DYNAMIC_PATH */
+# define DYNAMIC_PATH 0
+#endif
#ifndef BIND_RESTRICTED
-#define BIND_RESTRICTED 0
-#endif /* BIND_RESTRICTED */
+# define BIND_RESTRICTED 0
+#endif
-#define LTDL_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH)
+#define LT_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH)
-static lt_module_t
+static lt_module
sys_shl_open (loader_data, filename)
- lt_dlloader_data_t loader_data;
- const char *filename;
+ lt_user_data loader_data;
+ const char *filename;
{
- lt_module_t module = shl_load(filename, LTDL_BIND_FLAGS, 0L);
- if (!module) {
- last_error = LT_DLSTRERROR(CANNOT_OPEN);
+ static shl_t self = (shl_t) 0;
+ lt_module module = shl_load (filename, LT_BIND_FLAGS, 0L);
+
+ /* Since searching for a symbol against a NULL module handle will also
+ look in everything else that was already loaded and exported with
+ the -E compiler flag, we always cache a handle saved before any
+ modules are loaded. */
+ if (!self)
+ {
+ lt_ptr address;
+ shl_findsym (&self, "main", TYPE_UNDEFINED, &address);
+ }
+
+ if (!filename)
+ {
+ module = self;
+ }
+ else
+ {
+ module = shl_load (filename, LT_BIND_FLAGS, 0L);
+
+ if (!module)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN));
}
- return module;
+ }
+
+ return module;
}
static int
sys_shl_close (loader_data, module)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
+ lt_user_data loader_data;
+ lt_module module;
{
- if (shl_unload((shl_t) (module)) != 0) {
- last_error = LT_DLSTRERROR(CANNOT_CLOSE);
- return 1;
- }
- return 0;
+ int errors = 0;
+
+ if (module && (shl_unload ((shl_t) (module)) != 0))
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE));
+ ++errors;
+ }
+
+ return errors;
}
-static lt_ptr_t
+static lt_ptr
sys_shl_sym (loader_data, module, symbol)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
- const char *symbol;
+ lt_user_data loader_data;
+ lt_module module;
+ const char *symbol;
{
- lt_ptr_t address;
+ lt_ptr address = 0;
+
+ /* sys_shl_open should never return a NULL module handle */
+ if (module == (lt_module) 0)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
+ }
+ else if (!shl_findsym((shl_t*) &module, symbol, TYPE_UNDEFINED, &address))
+ {
+ if (!address)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
+ }
+ }
- if (module && shl_findsym((shl_t*) &module,
- symbol, TYPE_UNDEFINED, &address) == 0)
- if (address)
- return address;
- last_error = LT_DLSTRERROR(SYMBOL_NOT_FOUND);
- return 0;
+ return address;
}
-static struct lt_user_dlloader
-sys_shl = { 0, sys_shl_open, sys_shl_close, sys_shl_sym, 0, 0 };
+static struct lt_user_dlloader sys_shl = {
+ 0, sys_shl_open, sys_shl_close, sys_shl_sym, 0, 0
+};
-#undef LTDL_TYPE_TOP
-#define LTDL_TYPE_TOP &sys_shl
+#endif /* HAVE_SHL_LOAD */
-#endif
-#ifdef _WIN32
+
+
+/* --- LOADLIBRARY() INTERFACE LOADER --- */
+
+#ifdef __WINDOWS__
/* dynamic linking for Win32 */
@@ -446,99 +1301,136 @@ sys_shl = { 0, sys_shl_open, sys_shl_close, sys_shl_sym, 0, 0 };
/* Forward declaration; required to implement handle search below. */
static lt_dlhandle handles;
-static lt_module_t
+static lt_module
sys_wll_open (loader_data, filename)
- lt_dlloader_data_t loader_data;
- const char *filename;
-{
- lt_dlhandle cur;
- lt_module_t module;
- char *searchname = 0;
- char *ext;
- char self_name_buf[MAX_PATH];
-
- if (!filename) {
- /* Get the name of main module */
- *self_name_buf = 0;
- GetModuleFileName(NULL, self_name_buf, sizeof(self_name_buf));
- filename = ext = self_name_buf;
- }
- else ext = strrchr(filename, '.');
-
- if (ext) {
- /* FILENAME already has an extension. */
- searchname = strdup(filename);
- } else {
- /* Append a `.' to stop Windows from adding an
- implicit `.dll' extension. */
- searchname = (char*)lt_dlmalloc(2+ strlen(filename));
- if (!searchname) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 0;
- }
- strcpy(searchname, filename);
- strcat(searchname, ".");
+ lt_user_data loader_data;
+ const char *filename;
+{
+ lt_dlhandle cur;
+ lt_module module = 0;
+ const char *errormsg = 0;
+ char *searchname = 0;
+ char *ext;
+ char self_name_buf[MAX_PATH];
+
+ if (!filename)
+ {
+ /* Get the name of main module */
+ *self_name_buf = 0;
+ GetModuleFileName (NULL, self_name_buf, sizeof (self_name_buf));
+ filename = ext = self_name_buf;
+ }
+ else
+ {
+ ext = strrchr (filename, '.');
+ }
+
+ if (ext)
+ {
+ /* FILENAME already has an extension. */
+ searchname = lt_estrdup (filename);
+ }
+ else
+ {
+ /* Append a `.' to stop Windows from adding an
+ implicit `.dll' extension. */
+ searchname = LT_EMALLOC (char, 2+ LT_STRLEN (filename));
+ if (searchname)
+ sprintf (searchname, "%s.", filename);
+ }
+ if (!searchname)
+ return 0;
+
+#if __CYGWIN__
+ {
+ char wpath[MAX_PATH];
+ cygwin_conv_to_full_win32_path(searchname, wpath);
+ module = LoadLibrary(wpath);
+ }
+#else
+ module = LoadLibrary (searchname);
+#endif
+ LT_DLFREE (searchname);
+
+ /* libltdl expects this function to fail if it is unable
+ to physically load the library. Sadly, LoadLibrary
+ will search the loaded libraries for a match and return
+ one of them if the path search load fails.
+
+ We check whether LoadLibrary is returning a handle to
+ an already loaded module, and simulate failure if we
+ find one. */
+ LT_DLMUTEX_LOCK ();
+ cur = handles;
+ while (cur)
+ {
+ if (!cur->module)
+ {
+ cur = 0;
+ break;
}
- module = LoadLibrary(searchname);
- lt_dlfree(searchname);
-
- /* libltdl expects this function to fail if it is unable
- to physically load the library. Sadly, LoadLibrary
- will search the loaded libraries for a match and return
- one of them if the path search load fails.
-
- We check whether LoadLibrary is returning a handle to
- an already loaded module, and simulate failure if we
- find one. */
- cur = handles;
- while (cur) {
- if (!cur->module) {
- cur = 0;
- break;
- }
- if (cur->module == module)
- break;
- cur = cur->next;
+ if (cur->module == module)
+ {
+ break;
}
- if (cur || !module) {
- last_error = LT_DLSTRERROR(CANNOT_OPEN);
- return 0;
- }
+ cur = cur->next;
+ }
+ LT_DLMUTEX_UNLOCK ();
- return module;
+ if (cur || !module)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN));
+ module = 0;
+ }
+
+ return module;
}
static int
sys_wll_close (loader_data, module)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
+ lt_user_data loader_data;
+ lt_module module;
{
- if (FreeLibrary(module) == 0) {
- last_error = LT_DLSTRERROR(CANNOT_CLOSE);
- return 1;
- }
- return 0;
+ int errors = 0;
+
+ if (FreeLibrary(module) == 0)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE));
+ ++errors;
+ }
+
+ return errors;
}
-static lt_ptr_t
+static lt_ptr
sys_wll_sym (loader_data, module, symbol)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
- const char *symbol;
+ lt_user_data loader_data;
+ lt_module module;
+ const char *symbol;
{
- lt_ptr_t address = GetProcAddress(module, symbol);
-
- if (!address)
- last_error = LT_DLSTRERROR(SYMBOL_NOT_FOUND);
- return address;
+ lt_ptr address = GetProcAddress (module, symbol);
+
+ if (!address)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
+ }
+
+ return address;
}
-static struct lt_user_dlloader
-sys_wll = { 0, sys_wll_open, sys_wll_close, sys_wll_sym, 0, 0 };
+static struct lt_user_dlloader sys_wll = {
+ 0, sys_wll_open, sys_wll_close, sys_wll_sym, 0, 0
+};
+
+#endif /* __WINDOWS__ */
+
+
+
+
+/* --- LOAD_ADD_ON() INTERFACE LOADER --- */
-#endif
#ifdef __BEOS__
@@ -546,62 +1438,79 @@ sys_wll = { 0, sys_wll_open, sys_wll_close, sys_wll_sym, 0, 0 };
#include <kernel/image.h>
-static lt_module_t
+static lt_module
sys_bedl_open (loader_data, filename)
- lt_dlloader_data_t loader_data;
- const char *filename;
+ lt_user_data loader_data;
+ const char *filename;
{
- image_id image = 0;
-
- if (filename) {
- image = load_add_on(filename);
- } else {
- image_info info;
- int32 cookie = 0;
- if (get_next_image_info(0, &cookie, &info) == B_OK)
- image = load_add_on(info.name);
- }
- if (image <= 0) {
- last_error = LT_DLSTRERROR(CANNOT_OPEN);
- return 0;
- }
-
- return (lt_module_t) image;
+ image_id image = 0;
+
+ if (filename)
+ {
+ image = load_add_on (filename);
+ }
+ else
+ {
+ image_info info;
+ int32 cookie = 0;
+ if (get_next_image_info (0, &cookie, &info) == B_OK)
+ image = load_add_on (info.name);
+ }
+
+ if (image <= 0)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN));
+ image = 0;
+ }
+
+ return (lt_module) image;
}
static int
sys_bedl_close (loader_data, module)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
+ lt_user_data loader_data;
+ lt_module module;
{
- if (unload_add_on((image_id)module) != B_OK) {
- last_error = LT_DLSTRERROR(CANNOT_CLOSE);
- return 1;
- }
- return 0;
+ int errors = 0;
+
+ if (unload_add_on ((image_id) module) != B_OK)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE));
+ ++errors;
+ }
+
+ return errors;
}
-static lt_ptr_t
+static lt_ptr
sys_bedl_sym (loader_data, module, symbol)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
- const char *symbol;
+ lt_user_data loader_data;
+ lt_module module;
+ const char *symbol;
{
- lt_ptr_t address = 0;
- image_id image = (image_id)module;
-
- if (get_image_symbol(image, symbol, B_SYMBOL_TYPE_ANY,
- &address) != B_OK) {
- last_error = LT_DLSTRERROR(SYMBOL_NOT_FOUND);
- return 0;
- }
- return address;
+ lt_ptr address = 0;
+ image_id image = (image_id) module;
+
+ if (get_image_symbol (image, symbol, B_SYMBOL_TYPE_ANY, address) != B_OK)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
+ address = 0;
+ }
+
+ return address;
}
-static struct lt_user_dlloader
-sys_bedl = { 0, sys_bedl_open, sys_bedl_close, sys_bedl_sym, 0, 0 };
+static struct lt_user_dlloader sys_bedl = {
+ 0, sys_bedl_open, sys_bedl_close, sys_bedl_sym, 0, 0
+};
+
+#endif /* __BEOS__ */
+
+
+
+
+/* --- DLD_LINK() INTERFACE LOADER --- */
-#endif
#if HAVE_DLD
@@ -611,1374 +1520,2967 @@ sys_bedl = { 0, sys_bedl_open, sys_bedl_close, sys_bedl_sym, 0, 0 };
#include <dld.h>
#endif
-static lt_module_t
+static lt_module
sys_dld_open (loader_data, filename)
- lt_dlloader_data_t loader_data;
- const char *filename;
+ lt_user_data loader_data;
+ const char *filename;
{
- lt_module_t module = strdup(filename);
- if (!module) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 0;
- }
- if (dld_link(filename) != 0) {
- last_error = LT_DLSTRERROR(CANNOT_OPEN);
- lt_dlfree(module);
- return 0;
- }
- return module;
+ lt_module module = strdup (filename);
+
+ if (dld_link (filename) != 0)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN));
+ LT_DLFREE (module);
+ module = 0;
+ }
+
+ return module;
}
static int
sys_dld_close (loader_data, module)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
+ lt_user_data loader_data;
+ lt_module module;
{
- if (dld_unlink_by_file((char*)(module), 1) != 0) {
- last_error = LT_DLSTRERROR(CANNOT_CLOSE);
- return 1;
- }
- lt_dlfree(module);
- return 0;
+ int errors = 0;
+
+ if (dld_unlink_by_file ((char*)(module), 1) != 0)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE));
+ ++errors;
+ }
+ else
+ {
+ LT_DLFREE (module);
+ }
+
+ return errors;
}
-static lt_ptr_t
+static lt_ptr
sys_dld_sym (loader_data, module, symbol)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
+ lt_user_data loader_data;
+ lt_module module;
+ const char *symbol;
+{
+ lt_ptr address = dld_get_func (symbol);
+
+ if (!address)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
+ }
+
+ return address;
+}
+
+static struct lt_user_dlloader sys_dld = {
+ 0, sys_dld_open, sys_dld_close, sys_dld_sym, 0, 0
+};
+
+#endif /* HAVE_DLD */
+
+/* --- DYLD() MACOSX/DARWIN INTERFACE LOADER --- */
+#if HAVE_DYLD
+
+
+#if HAVE_MACH_O_DYLD_H
+# include <mach-o/dyld.h>
+#endif
+#include <mach-o/getsect.h>
+
+/* We have to put some stuff here that isn't in older dyld.h files */
+#ifndef ENUM_DYLD_BOOL
+# define ENUM_DYLD_BOOL
+# undef FALSE
+# undef TRUE
+ enum DYLD_BOOL {
+ FALSE,
+ TRUE
+ };
+#endif
+#ifndef LC_REQ_DYLD
+# define LC_REQ_DYLD 0x80000000
+#endif
+#ifndef LC_LOAD_WEAK_DYLIB
+# define LC_LOAD_WEAK_DYLIB (0x18 | LC_REQ_DYLD)
+#endif
+static const struct mach_header * (*ltdl_NSAddImage)(const char *image_name, unsigned long options) = 0;
+static NSSymbol (*ltdl_NSLookupSymbolInImage)(const struct mach_header *image,const char *symbolName, unsigned long options) = 0;
+static enum DYLD_BOOL (*ltdl_NSIsSymbolNameDefinedInImage)(const struct mach_header *image, const char *symbolName) = 0;
+static enum DYLD_BOOL (*ltdl_NSMakePrivateModulePublic)(NSModule module) = 0;
+
+#ifndef NSADDIMAGE_OPTION_NONE
+#define NSADDIMAGE_OPTION_NONE 0x0
+#endif
+#ifndef NSADDIMAGE_OPTION_RETURN_ON_ERROR
+#define NSADDIMAGE_OPTION_RETURN_ON_ERROR 0x1
+#endif
+#ifndef NSADDIMAGE_OPTION_WITH_SEARCHING
+#define NSADDIMAGE_OPTION_WITH_SEARCHING 0x2
+#endif
+#ifndef NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
+#define NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED 0x4
+#endif
+#ifndef NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME
+#define NSADDIMAGE_OPTION_MATCH_FILENAME_BY_INSTALLNAME 0x8
+#endif
+#ifndef NSLOOKUPSYMBOLINIMAGE_OPTION_BIND
+#define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND 0x0
+#endif
+#ifndef NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW
+#define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW 0x1
+#endif
+#ifndef NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY
+#define NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_FULLY 0x2
+#endif
+#ifndef NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR
+#define NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR 0x4
+#endif
+
+
+static const char *
+lt_int_dyld_error(othererror)
+ char* othererror;
+{
+/* return the dyld error string, or the passed in error string if none */
+ NSLinkEditErrors ler;
+ int lerno;
+ const char *errstr;
+ const char *file;
+ NSLinkEditError(&ler,&lerno,&file,&errstr);
+ if (!errstr || !strlen(errstr)) errstr = othererror;
+ return errstr;
+}
+
+static const struct mach_header *
+lt_int_dyld_get_mach_header_from_nsmodule(module)
+ NSModule module;
+{
+/* There should probably be an apple dyld api for this */
+ int i=_dyld_image_count();
+ int j;
+ const char *modname=NSNameOfModule(module);
+ const struct mach_header *mh=NULL;
+ if (!modname) return NULL;
+ for (j = 0; j < i; j++)
+ {
+ if (!strcmp(_dyld_get_image_name(j),modname))
+ {
+ mh=_dyld_get_image_header(j);
+ break;
+ }
+ }
+ return mh;
+}
+
+static const char* lt_int_dyld_lib_install_name(mh)
+ const struct mach_header *mh;
+{
+/* NSAddImage is also used to get the loaded image, but it only works if the lib
+ is installed, for uninstalled libs we need to check the install_names against
+ each other. Note that this is still broken if DYLD_IMAGE_SUFFIX is set and a
+ different lib was loaded as a result
+*/
+ int j;
+ struct load_command *lc;
+ unsigned long offset = sizeof(struct mach_header);
+ const struct mach_header *mh1;
+ const char* retStr=NULL;
+ for (j = 0; j < mh->ncmds; j++)
+ {
+ lc = (struct load_command*)(((unsigned long)mh) + offset);
+ if (LC_ID_DYLIB == lc->cmd)
+ {
+ retStr=(char*)(((struct dylib_command*)lc)->dylib.name.offset +
+ (unsigned long)lc);
+ }
+ offset += lc->cmdsize;
+ }
+ return retStr;
+}
+
+static const struct mach_header *
+lt_int_dyld_match_loaded_lib_by_install_name(const char *name)
+{
+ int i=_dyld_image_count();
+ int j;
+ const struct mach_header *mh=NULL;
+ const char *id=NULL;
+ for (j = 0; j < i; j++)
+ {
+ id=lt_int_dyld_lib_install_name(_dyld_get_image_header(j));
+ if ((id) && (!strcmp(id,name)))
+ {
+ mh=_dyld_get_image_header(j);
+ break;
+ }
+ }
+ return mh;
+}
+
+static NSSymbol
+lt_int_dyld_NSlookupSymbolInLinkedLibs(symbol,mh)
const char *symbol;
+ const struct mach_header *mh;
{
- lt_ptr_t address = dld_get_func(symbol);
+ /* Safe to assume our mh is good */
+ int j;
+ struct load_command *lc;
+ unsigned long offset = sizeof(struct mach_header);
+ NSSymbol retSym = 0;
+ const struct mach_header *mh1;
+ if ((ltdl_NSLookupSymbolInImage) && NSIsSymbolNameDefined(symbol) )
+ {
+ for (j = 0; j < mh->ncmds; j++)
+ {
+ lc = (struct load_command*)(((unsigned long)mh) + offset);
+ if ((LC_LOAD_DYLIB == lc->cmd) || (LC_LOAD_WEAK_DYLIB == lc->cmd))
+ {
+ mh1=lt_int_dyld_match_loaded_lib_by_install_name((char*)(((struct dylib_command*)lc)->dylib.name.offset +
+ (unsigned long)lc));
+ if (!mh1)
+ {
+ /* Maybe NSAddImage can find it */
+ mh1=ltdl_NSAddImage((char*)(((struct dylib_command*)lc)->dylib.name.offset +
+ (unsigned long)lc),
+ NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED +
+ NSADDIMAGE_OPTION_WITH_SEARCHING +
+ NSADDIMAGE_OPTION_RETURN_ON_ERROR );
+ }
+ if (mh1)
+ {
+ retSym = ltdl_NSLookupSymbolInImage(mh1,
+ symbol,
+ NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW
+ | NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR
+ );
+ if (retSym) break;
+ }
+ }
+ offset += lc->cmdsize;
+ }
+ }
+ return retSym;
+}
- if (!address)
- last_error = LT_DLSTRERROR(SYMBOL_NOT_FOUND);
- return address;
+static int
+sys_dyld_init()
+{
+ int retCode = 0;
+ int err = 0;
+ if (!_dyld_present()) {
+ retCode=1;
+ }
+ else {
+ err = _dyld_func_lookup("__dyld_NSAddImage",(unsigned long*)&ltdl_NSAddImage);
+ err = _dyld_func_lookup("__dyld_NSLookupSymbolInImage",(unsigned long*)&ltdl_NSLookupSymbolInImage);
+ err = _dyld_func_lookup("__dyld_NSIsSymbolNameDefinedInImage",(unsigned long*)&ltdl_NSIsSymbolNameDefinedInImage);
+ err = _dyld_func_lookup("__dyld_NSMakePrivateModulePublic",(unsigned long*)&ltdl_NSMakePrivateModulePublic);
+ }
+ return retCode;
}
-static struct lt_user_dlloader
-sys_dld = { 0, sys_dld_open, sys_dld_close, sys_dld_sym, 0, 0 };
+static lt_module
+sys_dyld_open (loader_data, filename)
+ lt_user_data loader_data;
+ const char *filename;
+{
+ lt_module module = 0;
+ NSObjectFileImage ofi = 0;
+ NSObjectFileImageReturnCode ofirc;
+
+ if (!filename)
+ return (lt_module)-1;
+ ofirc = NSCreateObjectFileImageFromFile(filename, &ofi);
+ switch (ofirc)
+ {
+ case NSObjectFileImageSuccess:
+ module = NSLinkModule(ofi, filename,
+ NSLINKMODULE_OPTION_RETURN_ON_ERROR
+ | NSLINKMODULE_OPTION_PRIVATE
+ | NSLINKMODULE_OPTION_BINDNOW);
+ NSDestroyObjectFileImage(ofi);
+ if (module)
+ ltdl_NSMakePrivateModulePublic(module);
+ break;
+ case NSObjectFileImageInappropriateFile:
+ if (ltdl_NSIsSymbolNameDefinedInImage && ltdl_NSLookupSymbolInImage)
+ {
+ module = (lt_module)ltdl_NSAddImage(filename, NSADDIMAGE_OPTION_RETURN_ON_ERROR);
+ break;
+ }
+ default:
+ LT_DLMUTEX_SETERROR (lt_int_dyld_error(LT_DLSTRERROR(CANNOT_OPEN)));
+ return 0;
+ }
+ if (!module) LT_DLMUTEX_SETERROR (lt_int_dyld_error(LT_DLSTRERROR(CANNOT_OPEN)));
+ return module;
+}
+static int
+sys_dyld_close (loader_data, module)
+ lt_user_data loader_data;
+ lt_module module;
+{
+ int retCode = 0;
+ int flags = 0;
+ unsigned long size=0;
+ if (module == (lt_module)-1) return 0;
+#ifdef __BIG_ENDIAN__
+ if (((struct mach_header *)module)->magic == MH_MAGIC)
+#else
+ if (((struct mach_header *)module)->magic == MH_CIGAM)
+#endif
+ {
+ LT_DLMUTEX_SETERROR("Can not close a dylib");
+ retCode = 1;
+ }
+ else
+ {
+#if 1
+/* Currently, if a module contains c++ static destructors and it is unloaded, we
+ get a segfault in atexit(), due to compiler and dynamic loader differences of
+ opinion, this works around that.
+*/
+ if ((const struct section *)NULL !=
+ getsectbynamefromheader(lt_int_dyld_get_mach_header_from_nsmodule(module),
+ "__DATA","__mod_term_func"))
+ {
+ flags += NSUNLINKMODULE_OPTION_KEEP_MEMORY_MAPPED;
+ }
+#endif
+#ifdef __ppc__
+ flags += NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES;
#endif
+ if (!NSUnLinkModule(module,flags))
+ {
+ retCode=1;
+ LT_DLMUTEX_SETERROR (lt_int_dyld_error(LT_DLSTRERROR(CANNOT_CLOSE)));
+ }
+ }
+
+ return retCode;
+}
+
+static lt_ptr
+sys_dyld_sym (loader_data, module, symbol)
+ lt_user_data loader_data;
+ lt_module module;
+ const char *symbol;
+{
+ lt_ptr address = 0;
+ NSSymbol *nssym = 0;
+ void *unused;
+ const struct mach_header *mh=NULL;
+ if (module == (lt_module)-1)
+ {
+ _dyld_lookup_and_bind(symbol,(unsigned long*)&address,&unused);
+ return address;
+ }
+#ifdef __BIG_ENDIAN__
+ if (((struct mach_header *)module)->magic == MH_MAGIC)
+#else
+ if (((struct mach_header *)module)->magic == MH_CIGAM)
+#endif
+ {
+ if (ltdl_NSIsSymbolNameDefinedInImage && ltdl_NSLookupSymbolInImage)
+ {
+ mh=module;
+ if (ltdl_NSIsSymbolNameDefinedInImage((struct mach_header*)module,symbol))
+ {
+ nssym = ltdl_NSLookupSymbolInImage((struct mach_header*)module,
+ symbol,
+ NSLOOKUPSYMBOLINIMAGE_OPTION_BIND_NOW
+ | NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR
+ );
+ }
+ }
+
+ }
+ else {
+ nssym = NSLookupSymbolInModule(module, symbol);
+ }
+ if (!nssym)
+ {
+ if (!mh) mh=lt_int_dyld_get_mach_header_from_nsmodule(module);
+ nssym = lt_int_dyld_NSlookupSymbolInLinkedLibs(symbol,mh);
+ }
+ if (!nssym)
+ {
+ LT_DLMUTEX_SETERROR (lt_int_dyld_error(LT_DLSTRERROR(SYMBOL_NOT_FOUND)));
+ return NULL;
+ }
+ return NSAddressOfSymbol(nssym);
+}
+
+static struct lt_user_dlloader sys_dyld =
+ { "_", sys_dyld_open, sys_dyld_close, sys_dyld_sym, 0, 0 };
+
+
+#endif /* HAVE_DYLD */
+
+
+/* --- DLPREOPEN() INTERFACE LOADER --- */
+
/* emulate dynamic linking using preloaded_symbols */
-typedef struct lt_dlsymlists_t {
- struct lt_dlsymlists_t *next;
- const lt_dlsymlist *syms;
+typedef struct lt_dlsymlists_t
+{
+ struct lt_dlsymlists_t *next;
+ const lt_dlsymlist *syms;
} lt_dlsymlists_t;
-static const lt_dlsymlist *default_preloaded_symbols = 0;
-static lt_dlsymlists_t *preloaded_symbols = 0;
+static const lt_dlsymlist *default_preloaded_symbols = 0;
+static lt_dlsymlists_t *preloaded_symbols = 0;
static int
presym_init (loader_data)
- lt_dlloader_data_t loader_data;
+ lt_user_data loader_data;
{
- preloaded_symbols = 0;
- if (default_preloaded_symbols)
- return lt_dlpreload(default_preloaded_symbols);
- return 0;
+ int errors = 0;
+
+ LT_DLMUTEX_LOCK ();
+
+ preloaded_symbols = 0;
+ if (default_preloaded_symbols)
+ {
+ errors = lt_dlpreload (default_preloaded_symbols);
+ }
+
+ LT_DLMUTEX_UNLOCK ();
+
+ return errors;
}
static int
-presym_free_symlists LTDL_PARAMS((void))
+presym_free_symlists ()
{
- lt_dlsymlists_t *lists = preloaded_symbols;
-
- while (lists) {
- lt_dlsymlists_t *tmp = lists;
-
- lists = lists->next;
- lt_dlfree(tmp);
- }
- preloaded_symbols = 0;
- return 0;
+ lt_dlsymlists_t *lists;
+
+ LT_DLMUTEX_LOCK ();
+
+ lists = preloaded_symbols;
+ while (lists)
+ {
+ lt_dlsymlists_t *tmp = lists;
+
+ lists = lists->next;
+ LT_DLFREE (tmp);
+ }
+ preloaded_symbols = 0;
+
+ LT_DLMUTEX_UNLOCK ();
+
+ return 0;
}
static int
presym_exit (loader_data)
- lt_dlloader_data_t loader_data;
+ lt_user_data loader_data;
{
- presym_free_symlists();
- return 0;
+ presym_free_symlists ();
+ return 0;
}
static int
presym_add_symlist (preloaded)
- const lt_dlsymlist *preloaded;
+ const lt_dlsymlist *preloaded;
{
- lt_dlsymlists_t *tmp;
- lt_dlsymlists_t *lists = preloaded_symbols;
-
- while (lists) {
- if (lists->syms == preloaded)
- return 0;
- lists = lists->next;
+ lt_dlsymlists_t *tmp;
+ lt_dlsymlists_t *lists;
+ int errors = 0;
+
+ LT_DLMUTEX_LOCK ();
+
+ lists = preloaded_symbols;
+ while (lists)
+ {
+ if (lists->syms == preloaded)
+ {
+ goto done;
}
-
- tmp = (lt_dlsymlists_t*) lt_dlmalloc(sizeof(lt_dlsymlists_t));
- if (!tmp) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- tmp->syms = preloaded;
- tmp->next = preloaded_symbols;
- preloaded_symbols = tmp;
- return 0;
+ lists = lists->next;
+ }
+
+ tmp = LT_EMALLOC (lt_dlsymlists_t, 1);
+ if (tmp)
+ {
+ memset (tmp, 0, sizeof(lt_dlsymlists_t));
+ tmp->syms = preloaded;
+ tmp->next = preloaded_symbols;
+ preloaded_symbols = tmp;
+ }
+ else
+ {
+ ++errors;
+ }
+
+ done:
+ LT_DLMUTEX_UNLOCK ();
+ return errors;
}
-static lt_module_t
+static lt_module
presym_open (loader_data, filename)
- lt_dlloader_data_t loader_data;
- const char *filename;
+ lt_user_data loader_data;
+ const char *filename;
{
- lt_dlsymlists_t *lists = preloaded_symbols;
-
- if (!lists) {
- last_error = LT_DLSTRERROR(NO_SYMBOLS);
- return 0;
- }
- if (!filename)
- filename = "@PROGRAM@";
- while (lists) {
- const lt_dlsymlist *syms = lists->syms;
-
- while (syms->name) {
- if (!syms->address &&
- strcmp(syms->name, filename) == 0) {
- return (lt_module_t) syms;
- }
- syms++;
- }
- lists = lists->next;
+ lt_dlsymlists_t *lists;
+ lt_module module = (lt_module) 0;
+
+ LT_DLMUTEX_LOCK ();
+ lists = preloaded_symbols;
+
+ if (!lists)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_SYMBOLS));
+ goto done;
+ }
+
+ /* Can't use NULL as the reflective symbol header, as NULL is
+ used to mark the end of the entire symbol list. Self-dlpreopened
+ symbols follow this magic number, chosen to be an unlikely
+ clash with a real module name. */
+ if (!filename)
+ {
+ filename = "@PROGRAM@";
+ }
+
+ while (lists)
+ {
+ const lt_dlsymlist *syms = lists->syms;
+
+ while (syms->name)
+ {
+ if (!syms->address && strcmp(syms->name, filename) == 0)
+ {
+ module = (lt_module) syms;
+ goto done;
+ }
+ ++syms;
}
- last_error = LT_DLSTRERROR(FILE_NOT_FOUND);
- return 0;
+
+ lists = lists->next;
+ }
+
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
+
+ done:
+ LT_DLMUTEX_UNLOCK ();
+ return module;
}
static int
presym_close (loader_data, module)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
+ lt_user_data loader_data;
+ lt_module module;
{
- /* Just to silence gcc -Wall */
- module = 0;
- return 0;
+ /* Just to silence gcc -Wall */
+ module = 0;
+ return 0;
}
-static lt_ptr_t
+static lt_ptr
presym_sym (loader_data, module, symbol)
- lt_dlloader_data_t loader_data;
- lt_module_t module;
- const char *symbol;
+ lt_user_data loader_data;
+ lt_module module;
+ const char *symbol;
{
- lt_dlsymlist *syms = (lt_dlsymlist*)(module);
-
- syms++;
- while (syms->address) {
- if (strcmp(syms->name, symbol) == 0)
- return syms->address;
- syms++;
+ lt_dlsymlist *syms = (lt_dlsymlist*) module;
+
+ ++syms;
+ while (syms->address)
+ {
+ if (strcmp(syms->name, symbol) == 0)
+ {
+ return syms->address;
}
- last_error = LT_DLSTRERROR(SYMBOL_NOT_FOUND);
- return 0;
+
+ ++syms;
+ }
+
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
+
+ return 0;
}
-static struct lt_user_dlloader
-presym = { 0, presym_open, presym_close, presym_sym, presym_exit, 0 };
+static struct lt_user_dlloader presym = {
+ 0, presym_open, presym_close, presym_sym, presym_exit, 0
+};
+
-static char *user_search_path = 0;
-static lt_dlloader_t *loaders = 0;
-static lt_dlhandle handles = 0;
-static int initialized = 0;
+
+/* --- DYNAMIC MODULE LOADING --- */
+
+
+/* The type of a function used at each iteration of foreach_dirinpath(). */
+typedef int foreach_callback_func LT_PARAMS((char *filename, lt_ptr data1,
+ lt_ptr data2));
+
+static int foreach_dirinpath LT_PARAMS((const char *search_path,
+ const char *base_name,
+ foreach_callback_func *func,
+ lt_ptr data1, lt_ptr data2));
+
+static int find_file_callback LT_PARAMS((char *filename, lt_ptr data,
+ lt_ptr ignored));
+static int find_handle_callback LT_PARAMS((char *filename, lt_ptr data,
+ lt_ptr ignored));
+static int foreachfile_callback LT_PARAMS((char *filename, lt_ptr data1,
+ lt_ptr data2));
+
+
+static int canonicalize_path LT_PARAMS((const char *path,
+ char **pcanonical));
+static int argzize_path LT_PARAMS((const char *path,
+ char **pargz,
+ size_t *pargz_len));
+static FILE *find_file LT_PARAMS((const char *search_path,
+ const char *base_name,
+ char **pdir));
+static lt_dlhandle *find_handle LT_PARAMS((const char *search_path,
+ const char *base_name,
+ lt_dlhandle *handle));
+static int find_module LT_PARAMS((lt_dlhandle *handle,
+ const char *dir,
+ const char *libdir,
+ const char *dlname,
+ const char *old_name,
+ int installed));
+static int free_vars LT_PARAMS((char *dlname, char *oldname,
+ char *libdir, char *deplibs));
+static int load_deplibs LT_PARAMS((lt_dlhandle handle,
+ char *deplibs));
+static int trim LT_PARAMS((char **dest,
+ const char *str));
+static int try_dlopen LT_PARAMS((lt_dlhandle *handle,
+ const char *filename));
+static int tryall_dlopen LT_PARAMS((lt_dlhandle *handle,
+ const char *filename));
+static int unload_deplibs LT_PARAMS((lt_dlhandle handle));
+static int lt_argz_insert LT_PARAMS((char **pargz,
+ size_t *pargz_len,
+ char *before,
+ const char *entry));
+static int lt_argz_insertinorder LT_PARAMS((char **pargz,
+ size_t *pargz_len,
+ const char *entry));
+static int lt_argz_insertdir LT_PARAMS((char **pargz,
+ size_t *pargz_len,
+ const char *dirnam,
+ struct dirent *dp));
+static int lt_dlpath_insertdir LT_PARAMS((char **ppath,
+ char *before,
+ const char *dir));
+static int list_files_by_dir LT_PARAMS((const char *dirnam,
+ char **pargz,
+ size_t *pargz_len));
+static int file_not_found LT_PARAMS((void));
+
+static char *user_search_path= 0;
+static lt_dlloader *loaders = 0;
+static lt_dlhandle handles = 0;
+static int initialized = 0;
+
+/* Initialize libltdl. */
int
-lt_dlinit LTDL_PARAMS((void))
+lt_dlinit ()
{
- /* initialize libltdl */
- int errors = 0;
+ int errors = 0;
- if (initialized) { /* Initialize only at first call. */
- initialized++;
- return 0;
- }
- handles = 0;
- user_search_path = 0; /* empty search path */
-
-#if HAVE_LIBDL && !defined(__CYGWIN__)
- errors += lt_dlloader_add (lt_dlloader_next(0), &sys_dl, "dlopen");
-#endif
+ LT_DLMUTEX_LOCK ();
+
+ /* Initialize only at first call. */
+ if (++initialized == 1)
+ {
+ handles = 0;
+ user_search_path = 0; /* empty search path */
+
+#if HAVE_LIBDL
+ errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dl, "dlopen");
+#endif
#if HAVE_SHL_LOAD
- errors += lt_dlloader_add (lt_dlloader_next(0), &sys_shl, "dlopen");
+ errors += lt_dlloader_add (lt_dlloader_next (0), &sys_shl, "dlopen");
#endif
-#ifdef _WIN32
- errors += lt_dlloader_add (lt_dlloader_next(0), &sys_wll, "dlopen");
+#ifdef __WINDOWS__
+ errors += lt_dlloader_add (lt_dlloader_next (0), &sys_wll, "dlopen");
#endif
#ifdef __BEOS__
- errors += lt_dlloader_add (lt_dlloader_next(0), &sys_bedl, "dlopen");
+ errors += lt_dlloader_add (lt_dlloader_next (0), &sys_bedl, "dlopen");
#endif
#if HAVE_DLD
- errors += lt_dlloader_add (lt_dlloader_next(0), &sys_dld, "dld");
+ errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dld, "dld");
#endif
- errors += lt_dlloader_add (lt_dlloader_next(0), &presym, "dlpreload");
- if (presym_init(presym.dlloader_data)) {
- last_error = LT_DLSTRERROR(INIT_LOADER);
- return 1;
- }
+#if HAVE_DYLD
+ errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dyld, "dyld");
+ errors += sys_dyld_init();
+#endif
+ errors += lt_dlloader_add (lt_dlloader_next (0), &presym, "dlpreload");
- if (errors != 0) {
- last_error = LT_DLSTRERROR(DLOPEN_NOT_SUPPORTED);
- return 1;
+ if (presym_init (presym.dlloader_data))
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INIT_LOADER));
+ ++errors;
}
- last_error = 0;
- initialized = 1;
- return 0;
+ else if (errors != 0)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (DLOPEN_NOT_SUPPORTED));
+ ++errors;
+ }
+ }
+
+ LT_DLMUTEX_UNLOCK ();
+
+ return errors;
}
int
lt_dlpreload (preloaded)
- const lt_dlsymlist *preloaded;
+ const lt_dlsymlist *preloaded;
{
- if (preloaded)
- return presym_add_symlist(preloaded);
- presym_free_symlists();
- if (default_preloaded_symbols)
- return lt_dlpreload(default_preloaded_symbols);
- return 0;
+ int errors = 0;
+
+ if (preloaded)
+ {
+ errors = presym_add_symlist (preloaded);
+ }
+ else
+ {
+ presym_free_symlists();
+
+ LT_DLMUTEX_LOCK ();
+ if (default_preloaded_symbols)
+ {
+ errors = lt_dlpreload (default_preloaded_symbols);
+ }
+ LT_DLMUTEX_UNLOCK ();
+ }
+
+ return errors;
}
int
lt_dlpreload_default (preloaded)
- const lt_dlsymlist *preloaded;
+ const lt_dlsymlist *preloaded;
{
- default_preloaded_symbols = preloaded;
- return 0;
+ LT_DLMUTEX_LOCK ();
+ default_preloaded_symbols = preloaded;
+ LT_DLMUTEX_UNLOCK ();
+ return 0;
}
int
-lt_dlexit LTDL_PARAMS((void))
+lt_dlexit ()
{
- /* shut down libltdl */
- lt_dlloader_t *loader = loaders;
- int errors, level;
-
- if (!initialized) {
- last_error = LT_DLSTRERROR(SHUTDOWN);
- return 1;
- }
- if (initialized != 1) { /* shut down only at last call. */
- initialized--;
- return 0;
- }
- /* close all modules */
- errors = 0;
- for (level = 1; handles; level++) {
- lt_dlhandle cur = handles;
- while (cur) {
- lt_dlhandle tmp = cur;
- cur = cur->next;
- if (tmp->info.ref_count <= level)
- if (lt_dlclose(tmp))
- errors++;
+ /* shut down libltdl */
+ lt_dlloader *loader;
+ int errors = 0;
+
+ LT_DLMUTEX_LOCK ();
+ loader = loaders;
+
+ if (!initialized)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SHUTDOWN));
+ ++errors;
+ goto done;
+ }
+
+ /* shut down only at last call. */
+ if (--initialized == 0)
+ {
+ int level;
+
+ while (handles && LT_DLIS_RESIDENT (handles))
+ {
+ handles = handles->next;
+ }
+
+ /* close all modules */
+ for (level = 1; handles; ++level)
+ {
+ lt_dlhandle cur = handles;
+ int saw_nonresident = 0;
+
+ while (cur)
+ {
+ lt_dlhandle tmp = cur;
+ cur = cur->next;
+ if (!LT_DLIS_RESIDENT (tmp))
+ saw_nonresident = 1;
+ if (!LT_DLIS_RESIDENT (tmp) && tmp->info.ref_count <= level)
+ {
+ if (lt_dlclose (tmp))
+ {
+ ++errors;
+ }
}
+ }
+ /* done if only resident modules are left */
+ if (!saw_nonresident)
+ break;
}
- /* close all loaders */
- while (loader) {
- lt_dlloader_t *next = loader->next;
- lt_dlloader_data_t data = loader->dlloader_data;
- if (loader->dlloader_exit && loader->dlloader_exit(data))
- errors++;
- lt_dlfree (loader);
- loader = next;
+
+ /* close all loaders */
+ while (loader)
+ {
+ lt_dlloader *next = loader->next;
+ lt_user_data data = loader->dlloader_data;
+ if (loader->dlloader_exit && loader->dlloader_exit (data))
+ {
+ ++errors;
+ }
+
+ LT_DLMEM_REASSIGN (loader, next);
}
+ loaders = 0;
+ }
- initialized = 0;
- return errors;
+ done:
+ LT_DLMUTEX_UNLOCK ();
+ return errors;
}
static int
tryall_dlopen (handle, filename)
- lt_dlhandle *handle;
- const char *filename;
+ lt_dlhandle *handle;
+ const char *filename;
{
- lt_dlhandle cur = handles;
- lt_dlloader_t *loader = loaders;
- const char *saved_error = last_error;
-
- /* check whether the module was already opened */
- while (cur) {
- /* try to dlopen the program itself? */
- if (!cur->info.filename && !filename)
- break;
- if (cur->info.filename && filename &&
- strcmp(cur->info.filename, filename) == 0)
- break;
- cur = cur->next;
+ lt_dlhandle cur;
+ lt_dlloader *loader;
+ const char *saved_error;
+ int errors = 0;
+
+ LT_DLMUTEX_GETERROR (saved_error);
+ LT_DLMUTEX_LOCK ();
+
+ cur = handles;
+ loader = loaders;
+
+ /* check whether the module was already opened */
+ while (cur)
+ {
+ /* try to dlopen the program itself? */
+ if (!cur->info.filename && !filename)
+ {
+ break;
}
- if (cur) {
- cur->info.ref_count++;
- *handle = cur;
- return 0;
+ if (cur->info.filename && filename
+ && strcmp (cur->info.filename, filename) == 0)
+ {
+ break;
}
-
- cur = *handle;
- if (filename) {
- cur->info.filename = strdup(filename);
- if (!cur->info.filename) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- } else
- cur->info.filename = 0;
- while (loader) {
- lt_dlloader_data_t data = loader->dlloader_data;
- cur->module = loader->module_open(data, filename);
- if (cur->module != 0)
- break;
- loader = loader->next;
+
+ cur = cur->next;
+ }
+
+ if (cur)
+ {
+ ++cur->info.ref_count;
+ *handle = cur;
+ goto done;
+ }
+
+ cur = *handle;
+ if (filename)
+ {
+ /* Comment out the check of file permissions using access.
+ This call seems to always return -1 with error EACCES.
+ */
+ /* We need to catch missing file errors early so that
+ file_not_found() can detect what happened.
+ if (access (filename, R_OK) != 0)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
+ ++errors;
+ goto done;
+ } */
+
+ cur->info.filename = lt_estrdup (filename);
+ if (!cur->info.filename)
+ {
+ ++errors;
+ goto done;
}
- if (!loader) {
- if (cur->info.filename)
- lt_dlfree(cur->info.filename);
- return 1;
+ }
+ else
+ {
+ cur->info.filename = 0;
+ }
+
+ while (loader)
+ {
+ lt_user_data data = loader->dlloader_data;
+
+ cur->module = loader->module_open (data, filename);
+
+ if (cur->module != 0)
+ {
+ break;
}
- cur->loader = loader;
- last_error = saved_error;
- return 0;
+ loader = loader->next;
+ }
+
+ if (!loader)
+ {
+ LT_DLFREE (cur->info.filename);
+ ++errors;
+ goto done;
+ }
+
+ cur->loader = loader;
+ LT_DLMUTEX_SETERROR (saved_error);
+
+ done:
+ LT_DLMUTEX_UNLOCK ();
+
+ return errors;
+}
+
+static int
+tryall_dlopen_module (handle, prefix, dirname, dlname)
+ lt_dlhandle *handle;
+ const char *prefix;
+ const char *dirname;
+ const char *dlname;
+{
+ int error = 0;
+ char *filename = 0;
+ size_t filename_len = 0;
+ size_t dirname_len = LT_STRLEN (dirname);
+
+ assert (handle);
+ assert (dirname);
+ assert (dlname);
+#ifdef LT_DIRSEP_CHAR
+ /* Only canonicalized names (i.e. with DIRSEP chars already converted)
+ should make it into this function: */
+ assert (strchr (dirname, LT_DIRSEP_CHAR) == 0);
+#endif
+
+ if (dirname_len > 0)
+ if (dirname[dirname_len -1] == '/')
+ --dirname_len;
+ filename_len = dirname_len + 1 + LT_STRLEN (dlname);
+
+ /* Allocate memory, and combine DIRNAME and MODULENAME into it.
+ The PREFIX (if any) is handled below. */
+ filename = LT_EMALLOC (char, dirname_len + 1 + filename_len + 1);
+ if (!filename)
+ return 1;
+
+ sprintf (filename, "%.*s/%s", (int) dirname_len, dirname, dlname);
+
+ /* Now that we have combined DIRNAME and MODULENAME, if there is
+ also a PREFIX to contend with, simply recurse with the arguments
+ shuffled. Otherwise, attempt to open FILENAME as a module. */
+ if (prefix)
+ {
+ error += tryall_dlopen_module (handle,
+ (const char *) 0, prefix, filename);
+ }
+ else if (tryall_dlopen (handle, filename) != 0)
+ {
+ ++error;
+ }
+
+ LT_DLFREE (filename);
+ return error;
}
static int
find_module (handle, dir, libdir, dlname, old_name, installed)
- lt_dlhandle *handle;
- const char *dir;
- const char *libdir;
- const char *dlname;
- const char *old_name;
- int installed;
-{
- int error;
- char *filename;
- /* try to open the old library first; if it was dlpreopened,
- we want the preopened version of it, even if a dlopenable
- module is available */
- if (old_name && tryall_dlopen(handle, old_name) == 0)
- return 0;
- /* try to open the dynamic library */
- if (dlname) {
- /* try to open the installed module */
- if (installed && libdir) {
- filename = (char*)
- lt_dlmalloc(strlen(libdir)+1+strlen(dlname)+1);
- if (!filename) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- sprintf (filename, "%s/%s", libdir, dlname);
- error = tryall_dlopen(handle, filename) != 0;
- lt_dlfree(filename);
- if (!error)
- return 0;
- }
- /* try to open the not-installed module */
- if (!installed) {
- filename = (char*)
- lt_dlmalloc((dir ? strlen(dir) : 0)
- + strlen(objdir) + strlen(dlname) + 1);
- if (!filename) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- if (dir)
- strcpy(filename, dir);
- else
- *filename = 0;
- strcat(filename, objdir);
- strcat(filename, dlname);
-
- error = tryall_dlopen(handle, filename) != 0;
- lt_dlfree(filename);
- if (!error)
- return 0;
- }
- /* maybe it was moved to another directory */
- {
- filename = (char*)
- lt_dlmalloc((dir ? strlen(dir) : 0)
- + strlen(dlname) + 1);
- if (dir)
- strcpy(filename, dir);
- else
- *filename = 0;
- strcat(filename, dlname);
- error = tryall_dlopen(handle, filename) != 0;
- lt_dlfree(filename);
- if (!error)
- return 0;
- }
+ lt_dlhandle *handle;
+ const char *dir;
+ const char *libdir;
+ const char *dlname;
+ const char *old_name;
+ int installed;
+{
+ /* Try to open the old library first; if it was dlpreopened,
+ we want the preopened version of it, even if a dlopenable
+ module is available. */
+ if (old_name && tryall_dlopen (handle, old_name) == 0)
+ {
+ return 0;
+ }
+
+ /* Try to open the dynamic library. */
+ if (dlname)
+ {
+ /* try to open the installed module */
+ if (installed && libdir)
+ {
+ if (tryall_dlopen_module (handle,
+ (const char *) 0, libdir, dlname) == 0)
+ return 0;
}
- return 1;
+
+ /* try to open the not-installed module */
+ if (!installed)
+ {
+ if (tryall_dlopen_module (handle, dir, objdir, dlname) == 0)
+ return 0;
+ }
+
+ /* maybe it was moved to another directory */
+ {
+ if (tryall_dlopen_module (handle,
+ (const char *) 0, dir, dlname) == 0)
+ return 0;
+ }
+ }
+
+ return 1;
}
-static char*
-canonicalize_path (path)
- const char *path;
+
+static int
+canonicalize_path (path, pcanonical)
+ const char *path;
+ char **pcanonical;
{
- char *canonical = 0;
-
- if (path && *path) {
- char *ptr = strdup (path);
- canonical = ptr;
-#ifdef LTDL_DIRSEP_CHAR
- /* Avoid this overhead where '/' is the only separator. */
- while (ptr = strchr (ptr, LTDL_DIRSEP_CHAR))
- *ptr++ = '/';
+ char *canonical = 0;
+
+ assert (path && *path);
+ assert (pcanonical);
+
+ canonical = LT_EMALLOC (char, 1+ LT_STRLEN (path));
+ if (!canonical)
+ return 1;
+
+ {
+ size_t dest = 0;
+ size_t src;
+ for (src = 0; path[src] != LT_EOS_CHAR; ++src)
+ {
+ /* Path separators are not copied to the beginning or end of
+ the destination, or if another separator would follow
+ immediately. */
+ if (path[src] == LT_PATHSEP_CHAR)
+ {
+ if ((dest == 0)
+ || (path[1+ src] == LT_PATHSEP_CHAR)
+ || (path[1+ src] == LT_EOS_CHAR))
+ continue;
+ }
+
+ /* Anything other than a directory separator is copied verbatim. */
+ if ((path[src] != '/')
+#ifdef LT_DIRSEP_CHAR
+ && (path[src] != LT_DIRSEP_CHAR)
#endif
- }
+ )
+ {
+ canonical[dest++] = path[src];
+ }
+ /* Directory separators are converted and copied only if they are
+ not at the end of a path -- i.e. before a path separator or
+ NULL terminator. */
+ else if ((path[1+ src] != LT_PATHSEP_CHAR)
+ && (path[1+ src] != LT_EOS_CHAR)
+#ifdef LT_DIRSEP_CHAR
+ && (path[1+ src] != LT_DIRSEP_CHAR)
+#endif
+ && (path[1+ src] != '/'))
+ {
+ canonical[dest++] = '/';
+ }
+ }
+
+ /* Add an end-of-string marker at the end. */
+ canonical[dest] = LT_EOS_CHAR;
+ }
- return canonical;
+ /* Assign new value. */
+ *pcanonical = canonical;
+
+ return 0;
}
-static lt_ptr_t
-find_file (basename, search_path, pdir, handle)
- const char *basename;
- const char *search_path;
- char **pdir;
- lt_dlhandle *handle;
+static int
+argzize_path (path, pargz, pargz_len)
+ const char *path;
+ char **pargz;
+ size_t *pargz_len;
{
- /* when handle != NULL search a library, otherwise a file */
- /* return NULL on failure, otherwise the file/handle */
+ error_t error;
+
+ assert (path);
+ assert (pargz);
+ assert (pargz_len);
+
+ if ((error = argz_create_sep (path, LT_PATHSEP_CHAR, pargz, pargz_len)))
+ {
+ switch (error)
+ {
+ case ENOMEM:
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
+ break;
+ default:
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN));
+ break;
+ }
- lt_ptr_t result = 0;
- char *filename = 0;
- int filenamesize = 0;
- int lenbase = strlen(basename);
- char *canonical = 0, *next = 0;
-
- if (!search_path || !*search_path) {
- last_error = LT_DLSTRERROR(FILE_NOT_FOUND);
- return 0;
- }
- canonical = canonicalize_path (search_path);
- if (!canonical) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- goto cleanup;
- }
- next = canonical;
- while (next) {
- int lendir;
- char *cur = next;
-
- next = strchr(cur, LTDL_PATHSEP_CHAR);
- if (!next)
- next = cur + strlen(cur);
- lendir = next - cur;
- if (*next == LTDL_PATHSEP_CHAR)
- ++next;
- else
- next = 0;
- if (lendir == 0)
- continue;
- if (lendir + 1 + lenbase >= filenamesize) {
- if (filename)
- lt_dlfree(filename);
- filenamesize = lendir + 1 + lenbase + 1;
- filename = (char*) lt_dlmalloc(filenamesize);
- if (!filename) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- goto cleanup;
- }
- }
- strncpy(filename, cur, lendir);
- if (filename[lendir-1] != '/')
- filename[lendir++] = '/';
- strcpy(filename+lendir, basename);
- if (handle) {
- if (tryall_dlopen(handle, filename) == 0) {
- result = (lt_ptr_t) handle;
- goto cleanup;
- }
- } else {
- FILE *file = fopen(filename, LTDL_READTEXT_MODE);
- if (file) {
- if (*pdir)
- lt_dlfree(*pdir);
- filename[lendir] = '\0';
- *pdir = strdup(filename);
- if (!*pdir) {
- /* We could have even avoided the
- strdup, but there would be some
- memory overhead. */
- *pdir = filename;
- filename = 0;
- }
- result = (lt_ptr_t) file;
- goto cleanup;
- }
- }
+ return 1;
+ }
+
+ return 0;
+}
+
+/* Repeatedly call FUNC with each LT_PATHSEP_CHAR delimited element
+ of SEARCH_PATH and references to DATA1 and DATA2, until FUNC returns
+ non-zero or all elements are exhausted. If BASE_NAME is non-NULL,
+ it is appended to each SEARCH_PATH element before FUNC is called. */
+static int
+foreach_dirinpath (search_path, base_name, func, data1, data2)
+ const char *search_path;
+ const char *base_name;
+ foreach_callback_func *func;
+ lt_ptr data1;
+ lt_ptr data2;
+{
+ int result = 0;
+ int filenamesize = 0;
+ size_t lenbase = LT_STRLEN (base_name);
+ size_t argz_len = 0;
+ char *argz = 0;
+ char *filename = 0;
+ char *canonical = 0;
+
+ LT_DLMUTEX_LOCK ();
+
+ if (!search_path || !*search_path)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
+ goto cleanup;
+ }
+
+ if (canonicalize_path (search_path, &canonical) != 0)
+ goto cleanup;
+
+ if (argzize_path (canonical, &argz, &argz_len) != 0)
+ goto cleanup;
+
+ {
+ char *dir_name = 0;
+ while ((dir_name = argz_next (argz, argz_len, dir_name)))
+ {
+ size_t lendir = LT_STRLEN (dir_name);
+
+ if (lendir +1 +lenbase >= filenamesize)
+ {
+ LT_DLFREE (filename);
+ filenamesize = lendir +1 +lenbase +1; /* "/d" + '/' + "f" + '\0' */
+ filename = LT_EMALLOC (char, filenamesize);
+ if (!filename)
+ goto cleanup;
}
- last_error = LT_DLSTRERROR(FILE_NOT_FOUND);
-cleanup:
- if (filename)
- lt_dlfree(filename);
- if (canonical)
- lt_dlfree(canonical);
- return result;
+
+ assert (filenamesize > lendir);
+ strcpy (filename, dir_name);
+
+ if (base_name && *base_name)
+ {
+ if (filename[lendir -1] != '/')
+ filename[lendir++] = '/';
+ strcpy (filename +lendir, base_name);
+ }
+
+ if ((result = (*func) (filename, data1, data2)))
+ {
+ break;
+ }
+ }
+ }
+
+ cleanup:
+ LT_DLFREE (argz);
+ LT_DLFREE (canonical);
+ LT_DLFREE (filename);
+
+ LT_DLMUTEX_UNLOCK ();
+
+ return result;
}
+/* If FILEPATH can be opened, store the name of the directory component
+ in DATA1, and the opened FILE* structure address in DATA2. Otherwise
+ DATA1 is unchanged, but DATA2 is set to a pointer to NULL. */
static int
-load_deplibs(handle, deplibs)
- lt_dlhandle handle;
- char *deplibs;
-{
- char *p, *save_search_path;
- int i;
- int ret = 1, depcount = 0;
- char **names = 0;
- lt_dlhandle *handles = 0;
-
- handle->depcount = 0;
- if (!deplibs)
- return 0;
- save_search_path = strdup(user_search_path);
- if (user_search_path && !save_search_path) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- p = deplibs;
- /* extract search paths and count deplibs */
- while (*p) {
- if (!isspace(*p)) {
- char *end = p+1;
- while (*end && !isspace(*end)) end++;
- if (strncmp(p, "-L", 2) == 0 ||
- strncmp(p, "-R", 2) == 0) {
- char save = *end;
- *end = 0; /* set a temporary string terminator */
- if (lt_dladdsearchdir(p+2))
- goto cleanup;
- *end = save;
- } else
- depcount++;
- p = end;
- } else
- p++;
- }
- if (!depcount) {
- ret = 0;
- goto cleanup;
- }
- names = (char**)lt_dlmalloc(depcount * sizeof(char*));
- if (!names)
- goto cleanup;
- handles = (lt_dlhandle*)lt_dlmalloc(depcount * sizeof(lt_dlhandle*));
- if (!handles)
- goto cleanup;
- depcount = 0;
- /* now only extract the actual deplibs */
- p = deplibs;
- while (*p) {
- if (!isspace(*p)) {
- char *end = p+1;
- while (*end && !isspace(*end)) end++;
- if (strncmp(p, "-L", 2) != 0 &&
- strncmp(p, "-R", 2) != 0) {
- char *name;
- char save = *end;
- *end = 0; /* set a temporary string terminator */
- if (strncmp(p, "-l", 2) == 0) {
- name = lt_dlmalloc(3+ /* "lib" */
- strlen(p+2)+1);
- if (name)
- sprintf (name, "lib%s", p+2);
- } else
- name = strdup(p);
- if (name)
- names[depcount++] = name;
- else
- goto cleanup_names;
- *end = save;
- }
- p = end;
- } else
- p++;
- }
- /* load the deplibs (in reverse order) */
- for (i = 0; i < depcount; i++) {
- lt_dlhandle handle = lt_dlopenext(names[depcount-1-i]);
- if (!handle) {
- int j;
- for (j = 0; j < i; j++)
- lt_dlclose(handles[j]);
- last_error = LT_DLSTRERROR(DEPLIB_NOT_FOUND);
- goto cleanup_names;
+find_file_callback (filename, data1, data2)
+ char *filename;
+ lt_ptr data1;
+ lt_ptr data2;
+{
+ char **pdir = (char **) data1;
+ FILE **pfile = (FILE **) data2;
+ int is_done = 0;
+
+ assert (filename && *filename);
+ assert (pdir);
+ assert (pfile);
+
+ if ((*pfile = fopen (filename, LT_READTEXT_MODE)))
+ {
+ char *dirend = strrchr (filename, '/');
+
+ if (dirend > filename)
+ *dirend = LT_EOS_CHAR;
+
+ LT_DLFREE (*pdir);
+ *pdir = lt_estrdup (filename);
+ is_done = (*pdir == 0) ? -1 : 1;
+ }
+
+ return is_done;
+}
+
+static FILE *
+find_file (search_path, base_name, pdir)
+ const char *search_path;
+ const char *base_name;
+ char **pdir;
+{
+ FILE *file = 0;
+
+ foreach_dirinpath (search_path, base_name, find_file_callback, pdir, &file);
+
+ return file;
+}
+
+static int
+find_handle_callback (filename, data, ignored)
+ char *filename;
+ lt_ptr data;
+ lt_ptr ignored;
+{
+ lt_dlhandle *handle = (lt_dlhandle *) data;
+ int notfound = access (filename, R_OK);
+
+ /* Bail out if file cannot be read... */
+ if (notfound)
+ return 0;
+
+ /* Try to dlopen the file, but do not continue searching in any
+ case. */
+ if (tryall_dlopen (handle, filename) != 0)
+ *handle = 0;
+
+ return 1;
+}
+
+/* If HANDLE was found return it, otherwise return 0. If HANDLE was
+ found but could not be opened, *HANDLE will be set to 0. */
+static lt_dlhandle *
+find_handle (search_path, base_name, handle)
+ const char *search_path;
+ const char *base_name;
+ lt_dlhandle *handle;
+{
+ if (!search_path)
+ return 0;
+
+ if (!foreach_dirinpath (search_path, base_name, find_handle_callback,
+ handle, 0))
+ return 0;
+
+ return handle;
+}
+
+static int
+load_deplibs (handle, deplibs)
+ lt_dlhandle handle;
+ char *deplibs;
+{
+#if LTDL_DLOPEN_DEPLIBS
+ char *p, *save_search_path = 0;
+ int depcount = 0;
+ int i;
+ char **names = 0;
+#endif
+ int errors = 0;
+
+ handle->depcount = 0;
+
+#if LTDL_DLOPEN_DEPLIBS
+ if (!deplibs)
+ {
+ return errors;
+ }
+ ++errors;
+
+ LT_DLMUTEX_LOCK ();
+ if (user_search_path)
+ {
+ save_search_path = lt_estrdup (user_search_path);
+ if (!save_search_path)
+ goto cleanup;
+ }
+
+ /* extract search paths and count deplibs */
+ p = deplibs;
+ while (*p)
+ {
+ if (!isspace ((int) *p))
+ {
+ char *end = p+1;
+ while (*end && !isspace((int) *end))
+ {
+ ++end;
+ }
+
+ if (strncmp(p, "-L", 2) == 0 || strncmp(p, "-R", 2) == 0)
+ {
+ char save = *end;
+ *end = 0; /* set a temporary string terminator */
+ if (lt_dladdsearchdir(p+2))
+ {
+ goto cleanup;
+ }
+ *end = save;
+ }
+ else
+ {
+ ++depcount;
+ }
+
+ p = end;
+ }
+ else
+ {
+ ++p;
+ }
+ }
+
+ /* restore the old search path */
+ LT_DLFREE (user_search_path);
+ user_search_path = save_search_path;
+
+ LT_DLMUTEX_UNLOCK ();
+
+ if (!depcount)
+ {
+ errors = 0;
+ goto cleanup;
+ }
+
+ names = LT_EMALLOC (char *, depcount * sizeof (char*));
+ if (!names)
+ goto cleanup;
+
+ /* now only extract the actual deplibs */
+ depcount = 0;
+ p = deplibs;
+ while (*p)
+ {
+ if (isspace ((int) *p))
+ {
+ ++p;
+ }
+ else
+ {
+ char *end = p+1;
+ while (*end && !isspace ((int) *end))
+ {
+ ++end;
+ }
+
+ if (strncmp(p, "-L", 2) != 0 && strncmp(p, "-R", 2) != 0)
+ {
+ char *name;
+ char save = *end;
+ *end = 0; /* set a temporary string terminator */
+ if (strncmp(p, "-l", 2) == 0)
+ {
+ size_t name_len = 3+ /* "lib" */ LT_STRLEN (p + 2);
+ name = LT_EMALLOC (char, 1+ name_len);
+ if (name)
+ sprintf (name, "lib%s", p+2);
}
- handles[i] = handle;
- }
- handle->depcount = depcount;
- handle->deplibs = handles;
- handles = 0;
- ret = 0;
-cleanup_names:
- for (i = 0; i < depcount; i++)
- lt_dlfree(names[i]);
-cleanup:
- if (names)
- lt_dlfree(names);
- if (handles)
- lt_dlfree(handles);
- /* restore the old search path */
- if (user_search_path)
- lt_dlfree(user_search_path);
- user_search_path = save_search_path;
- return ret;
+ else
+ name = lt_estrdup(p);
+
+ if (!name)
+ goto cleanup_names;
+
+ names[depcount++] = name;
+ *end = save;
+ }
+ p = end;
+ }
+ }
+
+ /* load the deplibs (in reverse order)
+ At this stage, don't worry if the deplibs do not load correctly,
+ they may already be statically linked into the loading application
+ for instance. There will be a more enlightening error message
+ later on if the loaded module cannot resolve all of its symbols. */
+ if (depcount)
+ {
+ int j = 0;
+
+ handle->deplibs = (lt_dlhandle*) LT_EMALLOC (lt_dlhandle *, depcount);
+ if (!handle->deplibs)
+ goto cleanup;
+
+ for (i = 0; i < depcount; ++i)
+ {
+ handle->deplibs[j] = lt_dlopenext(names[depcount-1-i]);
+ if (handle->deplibs[j])
+ {
+ ++j;
+ }
+ }
+
+ handle->depcount = j; /* Number of successfully loaded deplibs */
+ errors = 0;
+ }
+
+ cleanup_names:
+ for (i = 0; i < depcount; ++i)
+ {
+ LT_DLFREE (names[i]);
+ }
+
+ cleanup:
+ LT_DLFREE (names);
+#endif
+
+ return errors;
}
static int
-unload_deplibs(handle)
- lt_dlhandle handle;
+unload_deplibs (handle)
+ lt_dlhandle handle;
{
- int i;
- int errors = 0;
-
- if (!handle->depcount)
- return 0;
- for (i = 0; i < handle->depcount; i++)
- errors += lt_dlclose(handle->deplibs[i]);
- return errors;
+ int i;
+ int errors = 0;
+
+ if (handle->depcount)
+ {
+ for (i = 0; i < handle->depcount; ++i)
+ {
+ if (!LT_DLIS_RESIDENT (handle->deplibs[i]))
+ {
+ errors += lt_dlclose (handle->deplibs[i]);
+ }
+ }
+ }
+
+ return errors;
}
-static inline int
+static int
trim (dest, str)
- char **dest;
- const char *str;
-{
- /* remove the leading and trailing "'" from str
- and store the result in dest */
- char *tmp;
- const char *end = strrchr(str, '\'');
- int len = strlen(str);
-
- if (*dest)
- lt_dlfree(*dest);
- if (len > 3 && str[0] == '\'') {
- tmp = (char*) lt_dlmalloc(end - str);
- if (!tmp) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- strncpy(tmp, &str[1], (end - str) - 1);
- tmp[len-3] = '\0';
- *dest = tmp;
- } else
- *dest = 0;
- return 0;
+ char **dest;
+ const char *str;
+{
+ /* remove the leading and trailing "'" from str
+ and store the result in dest */
+ const char *end = strrchr (str, '\'');
+ size_t len = LT_STRLEN (str);
+ char *tmp;
+
+ LT_DLFREE (*dest);
+
+ if (len > 3 && str[0] == '\'')
+ {
+ tmp = LT_EMALLOC (char, end - str);
+ if (!tmp)
+ return 1;
+
+ strncpy(tmp, &str[1], (end - str) - 1);
+ tmp[len-3] = LT_EOS_CHAR;
+ *dest = tmp;
+ }
+ else
+ {
+ *dest = 0;
+ }
+
+ return 0;
}
-static inline int
-free_vars( dlname, oldname, libdir, deplibs)
- char *dlname;
- char *oldname;
- char *libdir;
- char *deplibs;
-{
- if (dlname)
- lt_dlfree(dlname);
- if (oldname)
- lt_dlfree(oldname);
- if (libdir)
- lt_dlfree(libdir);
- if (deplibs)
- lt_dlfree(deplibs);
- return 0;
+static int
+free_vars (dlname, oldname, libdir, deplibs)
+ char *dlname;
+ char *oldname;
+ char *libdir;
+ char *deplibs;
+{
+ LT_DLFREE (dlname);
+ LT_DLFREE (oldname);
+ LT_DLFREE (libdir);
+ LT_DLFREE (deplibs);
+
+ return 0;
}
-lt_dlhandle
-lt_dlopen (filename)
- const char *filename;
+static int
+try_dlopen (phandle, filename)
+ lt_dlhandle *phandle;
+ const char *filename;
{
- lt_dlhandle handle = 0, newhandle;
- const char *ext;
- const char *saved_error = last_error;
- char *canonical = 0, *basename = 0, *dir = 0, *name = 0;
-
- if (!filename) {
- handle = (lt_dlhandle) lt_dlmalloc(sizeof(lt_dlhandle_t));
- if (!handle) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 0;
- }
- handle->info.ref_count = 0;
- handle->depcount = 0;
- handle->deplibs = 0;
- newhandle = handle;
- if (tryall_dlopen(&newhandle, 0) != 0) {
- lt_dlfree(handle);
- return 0;
- }
- goto register_handle;
- }
- canonical = canonicalize_path (filename);
- if (!canonical) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- if (handle)
- lt_dlfree(handle);
- return 0;
- }
- basename = strrchr(canonical, '/');
- if (basename) {
- basename++;
- dir = (char*) lt_dlmalloc(basename - canonical + 1);
- if (!dir) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- handle = 0;
- goto cleanup;
- }
- strncpy(dir, canonical, basename - canonical);
- dir[basename - canonical] = '\0';
- } else
- basename = canonical;
- /* check whether we open a libtool module (.la extension) */
- ext = strrchr(basename, '.');
- if (ext && strcmp(ext, ".la") == 0) {
- /* this seems to be a libtool module */
- FILE *file;
- int i;
- char *dlname = 0, *old_name = 0;
- char *libdir = 0, *deplibs = 0;
- char *line;
- int error = 0;
- /* if we can't find the installed flag, it is probably an
- installed libtool archive, produced with an old version
- of libtool */
- int installed = 1;
-
- /* extract the module name from the file name */
- name = (char*) lt_dlmalloc(ext - basename + 1);
- if (!name) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- handle = 0;
- goto cleanup;
- }
- /* canonicalize the module name */
- for (i = 0; i < ext - basename; i++)
- if (isalnum((int)(basename[i])))
- name[i] = basename[i];
- else
- name[i] = '_';
- name[ext - basename] = '\0';
- /* now try to open the .la file */
- file = fopen(filename, LTDL_READTEXT_MODE);
- if (!file)
- last_error = LT_DLSTRERROR(FILE_NOT_FOUND);
- if (!file && !dir) {
- /* try other directories */
- file = (FILE*) find_file(basename,
- user_search_path,
- &dir, 0);
- if (!file)
- file = (FILE*) find_file(basename,
- getenv("LTDL_LIBRARY_PATH"),
- &dir, 0);
+ const char * ext = 0;
+ const char * saved_error = 0;
+ char * canonical = 0;
+ char * base_name = 0;
+ char * dir = 0;
+ char * name = 0;
+ int errors = 0;
+ lt_dlhandle newhandle;
+
+ assert (phandle);
+ assert (*phandle == 0);
+
+ LT_DLMUTEX_GETERROR (saved_error);
+
+ /* dlopen self? */
+ if (!filename)
+ {
+ *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1);
+ if (*phandle == 0)
+ return 1;
+
+ memset (*phandle, 0, sizeof(struct lt_dlhandle_struct));
+ newhandle = *phandle;
+
+ /* lt_dlclose()ing yourself is very bad! Disallow it. */
+ LT_DLSET_FLAG (*phandle, LT_DLRESIDENT_FLAG);
+
+ if (tryall_dlopen (&newhandle, 0) != 0)
+ {
+ LT_DLFREE (*phandle);
+ return 1;
+ }
+
+ goto register_handle;
+ }
+
+ assert (filename && *filename);
+
+ /* Doing this immediately allows internal functions to safely
+ assume only canonicalized paths are passed. */
+ if (canonicalize_path (filename, &canonical) != 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ /* If the canonical module name is a path (relative or absolute)
+ then split it into a directory part and a name part. */
+ base_name = strrchr (canonical, '/');
+ if (base_name)
+ {
+ size_t dirlen = (1+ base_name) - canonical;
+
+ dir = LT_EMALLOC (char, 1+ dirlen);
+ if (!dir)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ strncpy (dir, canonical, dirlen);
+ dir[dirlen] = LT_EOS_CHAR;
+
+ ++base_name;
+ }
+ else
+ LT_DLMEM_REASSIGN (base_name, canonical);
+
+ assert (base_name && *base_name);
+
+ /* Check whether we are opening a libtool module (.la extension). */
+ ext = strrchr (base_name, '.');
+ if (ext && strcmp (ext, archive_ext) == 0)
+ {
+ /* this seems to be a libtool module */
+ FILE * file = 0;
+ char * dlname = 0;
+ char * old_name = 0;
+ char * libdir = 0;
+ char * deplibs = 0;
+ char * line = 0;
+ size_t line_len;
+
+ /* if we can't find the installed flag, it is probably an
+ installed libtool archive, produced with an old version
+ of libtool */
+ int installed = 1;
+
+ /* extract the module name from the file name */
+ name = LT_EMALLOC (char, ext - base_name + 1);
+ if (!name)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ /* canonicalize the module name */
+ {
+ size_t i;
+ for (i = 0; i < ext - base_name; ++i)
+ {
+ if (isalnum ((int)(base_name[i])))
+ {
+ name[i] = base_name[i];
+ }
+ else
+ {
+ name[i] = '_';
+ }
+ }
+ name[ext - base_name] = LT_EOS_CHAR;
+ }
+
+ /* Now try to open the .la file. If there is no directory name
+ component, try to find it first in user_search_path and then other
+ prescribed paths. Otherwise (or in any case if the module was not
+ yet found) try opening just the module name as passed. */
+ if (!dir)
+ {
+ const char *search_path;
+
+ LT_DLMUTEX_LOCK ();
+ search_path = user_search_path;
+ if (search_path)
+ file = find_file (user_search_path, base_name, &dir);
+ LT_DLMUTEX_UNLOCK ();
+
+ if (!file)
+ {
+ search_path = getenv (LTDL_SEARCHPATH_VAR);
+ if (search_path)
+ file = find_file (search_path, base_name, &dir);
+ }
+
#ifdef LTDL_SHLIBPATH_VAR
- if (!file)
- file = (FILE*) find_file(basename,
- getenv(LTDL_SHLIBPATH_VAR),
- &dir, 0);
+ if (!file)
+ {
+ search_path = getenv (LTDL_SHLIBPATH_VAR);
+ if (search_path)
+ file = find_file (search_path, base_name, &dir);
+ }
#endif
#ifdef LTDL_SYSSEARCHPATH
- if (!file)
- file = (FILE*) find_file(basename,
- sys_search_path,
- &dir, 0);
+ if (!file && sys_search_path)
+ {
+ file = find_file (sys_search_path, base_name, &dir);
+ }
#endif
+ }
+ if (!file)
+ {
+ file = fopen (filename, LT_READTEXT_MODE);
+ }
+
+ /* If we didn't find the file by now, it really isn't there. Set
+ the status flag, and bail out. */
+ if (!file)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
+ ++errors;
+ goto cleanup;
+ }
+
+ line_len = LT_FILENAME_MAX;
+ line = LT_EMALLOC (char, line_len);
+ if (!line)
+ {
+ fclose (file);
+ ++errors;
+ goto cleanup;
+ }
+
+ /* read the .la file */
+ while (!feof (file))
+ {
+ if (!fgets (line, (int) line_len, file))
+ {
+ break;
+ }
+
+ /* Handle the case where we occasionally need to read a line
+ that is longer than the initial buffer size. */
+ while ((line[LT_STRLEN(line) -1] != '\n') && (!feof (file)))
+ {
+ line = LT_DLREALLOC (char, line, line_len *2);
+ if (!fgets (&line[line_len -1], (int) line_len +1, file))
+ {
+ break;
}
- if (!file) {
- handle = 0;
- goto cleanup;
- }
- line = (char*) lt_dlmalloc(LTDL_FILENAME_MAX);
- if (!line) {
- fclose(file);
- last_error = LT_DLSTRERROR(NO_MEMORY);
- handle = 0;
- goto cleanup;
- }
- /* read the .la file */
- while (!feof(file)) {
- if (!fgets(line, LTDL_FILENAME_MAX, file))
- break;
- if (line[0] == '\n' || line[0] == '#')
- continue;
-# undef STR_DLNAME
-# define STR_DLNAME "dlname="
- if (strncmp(line, STR_DLNAME,
- sizeof(STR_DLNAME) - 1) == 0)
- error = trim(&dlname,
- &line[sizeof(STR_DLNAME) - 1]);
- else
-# undef STR_OLD_LIBRARY
-# define STR_OLD_LIBRARY "old_library="
- if (strncmp(line, STR_OLD_LIBRARY,
- sizeof(STR_OLD_LIBRARY) - 1) == 0)
- error = trim(&old_name,
- &line[sizeof(STR_OLD_LIBRARY) - 1]);
- else
-# undef STR_LIBDIR
-# define STR_LIBDIR "libdir="
- if (strncmp(line, STR_LIBDIR,
- sizeof(STR_LIBDIR) - 1) == 0)
- error = trim(&libdir,
- &line[sizeof(STR_LIBDIR) - 1]);
- else
-# undef STR_DL_DEPLIBS
-# define STR_DL_DEPLIBS "dl_dependency_libs="
- if (strncmp(line, STR_DL_DEPLIBS,
- sizeof(STR_DL_DEPLIBS) - 1) == 0)
- error = trim(&deplibs,
- &line[sizeof(STR_DL_DEPLIBS) - 1]);
- else
- if (strcmp(line, "installed=yes\n") == 0)
- installed = 1;
- else
- if (strcmp(line, "installed=no\n") == 0)
- installed = 0;
- else
-# undef STR_LIBRARY_NAMES
-# define STR_LIBRARY_NAMES "library_names="
- if (! dlname &&
- strncmp(line, STR_LIBRARY_NAMES,
- sizeof(STR_LIBRARY_NAMES) - 1) == 0) {
- char *last_libname;
- error = trim(&dlname,
- &line[sizeof(STR_LIBRARY_NAMES) - 1]);
- if (! error && dlname &&
- (last_libname = strrchr(dlname, ' ')) != NULL) {
- last_libname = strdup(last_libname + 1);
- free(dlname);
- dlname = last_libname;
- }
- }
- if (error)
- break;
- }
- fclose(file);
- lt_dlfree(line);
- /* allocate the handle */
- handle = (lt_dlhandle) lt_dlmalloc(sizeof(lt_dlhandle_t));
- if (!handle || error) {
- if (handle)
- lt_dlfree(handle);
- if (!error)
- last_error = LT_DLSTRERROR(NO_MEMORY);
- free_vars(dlname, old_name, libdir, deplibs);
- /* handle is already set to 0 */
- goto cleanup;
- }
- handle->info.ref_count = 0;
- if (load_deplibs(handle, deplibs) == 0) {
- newhandle = handle;
- /* find_module may replace newhandle */
- if (find_module(&newhandle, dir, libdir,
- dlname, old_name, installed)) {
- unload_deplibs(handle);
- error = 1;
- }
- } else
- error = 1;
- free_vars(dlname, old_name, libdir, deplibs);
- if (error) {
- lt_dlfree(handle);
- handle = 0;
- goto cleanup;
- }
- if (handle != newhandle)
- unload_deplibs(handle);
- } else {
- /* not a libtool module */
- handle = (lt_dlhandle) lt_dlmalloc(sizeof(lt_dlhandle_t));
- if (!handle) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- /* handle is already set to 0 */
- goto cleanup;
+ line_len *= 2;
+ }
+
+ if (line[0] == '\n' || line[0] == '#')
+ {
+ continue;
+ }
+
+#undef STR_DLNAME
+#define STR_DLNAME "dlname="
+ if (strncmp (line, STR_DLNAME, sizeof (STR_DLNAME) - 1) == 0)
+ {
+ errors += trim (&dlname, &line[sizeof (STR_DLNAME) - 1]);
+ }
+
+#undef STR_OLD_LIBRARY
+#define STR_OLD_LIBRARY "old_library="
+ else if (strncmp (line, STR_OLD_LIBRARY,
+ sizeof (STR_OLD_LIBRARY) - 1) == 0)
+ {
+ errors += trim (&old_name, &line[sizeof (STR_OLD_LIBRARY) - 1]);
+ }
+#undef STR_LIBDIR
+#define STR_LIBDIR "libdir="
+ else if (strncmp (line, STR_LIBDIR, sizeof (STR_LIBDIR) - 1) == 0)
+ {
+ errors += trim (&libdir, &line[sizeof(STR_LIBDIR) - 1]);
+ }
+
+#undef STR_DL_DEPLIBS
+#define STR_DL_DEPLIBS "dependency_libs="
+ else if (strncmp (line, STR_DL_DEPLIBS,
+ sizeof (STR_DL_DEPLIBS) - 1) == 0)
+ {
+ errors += trim (&deplibs, &line[sizeof (STR_DL_DEPLIBS) - 1]);
+ }
+ else if (strcmp (line, "installed=yes\n") == 0)
+ {
+ installed = 1;
+ }
+ else if (strcmp (line, "installed=no\n") == 0)
+ {
+ installed = 0;
+ }
+
+#undef STR_LIBRARY_NAMES
+#define STR_LIBRARY_NAMES "library_names="
+ else if (! dlname && strncmp (line, STR_LIBRARY_NAMES,
+ sizeof (STR_LIBRARY_NAMES) - 1) == 0)
+ {
+ char *last_libname;
+ errors += trim (&dlname, &line[sizeof (STR_LIBRARY_NAMES) - 1]);
+ if (!errors
+ && dlname
+ && (last_libname = strrchr (dlname, ' ')) != 0)
+ {
+ last_libname = lt_estrdup (last_libname + 1);
+ if (!last_libname)
+ {
+ ++errors;
+ goto cleanup;
+ }
+ LT_DLMEM_REASSIGN (dlname, last_libname);
}
- handle->info.ref_count = 0;
- /* non-libtool modules don't have dependencies */
- handle->depcount = 0;
- handle->deplibs = 0;
- newhandle = handle;
- if (tryall_dlopen(&newhandle, filename)
- && (dir
- || (!find_file(basename, user_search_path,
- 0, &newhandle)
- && !find_file(basename,
- getenv("LTDL_LIBRARY_PATH"),
- 0, &newhandle)
+ }
+
+ if (errors)
+ break;
+ }
+
+ fclose (file);
+ LT_DLFREE (line);
+
+ /* allocate the handle */
+ *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1);
+ if (*phandle == 0)
+ ++errors;
+
+ if (errors)
+ {
+ free_vars (dlname, old_name, libdir, deplibs);
+ LT_DLFREE (*phandle);
+ goto cleanup;
+ }
+
+ assert (*phandle);
+
+ memset (*phandle, 0, sizeof(struct lt_dlhandle_struct));
+ if (load_deplibs (*phandle, deplibs) == 0)
+ {
+ newhandle = *phandle;
+ /* find_module may replace newhandle */
+ if (find_module (&newhandle, dir, libdir, dlname, old_name, installed))
+ {
+ unload_deplibs (*phandle);
+ ++errors;
+ }
+ }
+ else
+ {
+ ++errors;
+ }
+
+ free_vars (dlname, old_name, libdir, deplibs);
+ if (errors)
+ {
+ LT_DLFREE (*phandle);
+ goto cleanup;
+ }
+
+ if (*phandle != newhandle)
+ {
+ unload_deplibs (*phandle);
+ }
+ }
+ else
+ {
+ /* not a libtool module */
+ *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1);
+ if (*phandle == 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ memset (*phandle, 0, sizeof (struct lt_dlhandle_struct));
+ newhandle = *phandle;
+
+ /* If the module has no directory name component, try to find it
+ first in user_search_path and then other prescribed paths.
+ Otherwise (or in any case if the module was not yet found) try
+ opening just the module name as passed. */
+ if ((dir || (!find_handle (user_search_path, base_name, &newhandle)
+ && !find_handle (getenv (LTDL_SEARCHPATH_VAR), base_name,
+ &newhandle)
#ifdef LTDL_SHLIBPATH_VAR
- && !find_file(basename,
- getenv(LTDL_SHLIBPATH_VAR),
- 0, &newhandle)
+ && !find_handle (getenv (LTDL_SHLIBPATH_VAR), base_name,
+ &newhandle)
#endif
#ifdef LTDL_SYSSEARCHPATH
- && !find_file(basename, sys_search_path,
- 0, &newhandle)
+ && !find_handle (sys_search_path, base_name, &newhandle)
#endif
- ))) {
- lt_dlfree(handle);
- handle = 0;
- goto cleanup;
- }
+ )))
+ {
+ if (tryall_dlopen (&newhandle, filename) != 0)
+ {
+ newhandle = NULL;
+ }
+ }
+
+ if (!newhandle)
+ {
+ LT_DLFREE (*phandle);
+ ++errors;
+ goto cleanup;
}
-register_handle:
- if (newhandle != handle) {
- lt_dlfree(handle);
- handle = newhandle;
- }
- if (!handle->info.ref_count) {
- handle->info.ref_count = 1;
- handle->info.name = name;
- handle->next = handles;
- handles = handle;
- name = 0; /* don't free this during `cleanup' */
- }
- last_error = saved_error;
-cleanup:
- if (dir)
- lt_dlfree(dir);
- if (name)
- lt_dlfree(name);
- if (canonical)
- lt_dlfree(canonical);
- return handle;
+ }
+
+ register_handle:
+ LT_DLMEM_REASSIGN (*phandle, newhandle);
+
+ if ((*phandle)->info.ref_count == 0)
+ {
+ (*phandle)->info.ref_count = 1;
+ LT_DLMEM_REASSIGN ((*phandle)->info.name, name);
+
+ LT_DLMUTEX_LOCK ();
+ (*phandle)->next = handles;
+ handles = *phandle;
+ LT_DLMUTEX_UNLOCK ();
+ }
+
+ LT_DLMUTEX_SETERROR (saved_error);
+
+ cleanup:
+ LT_DLFREE (dir);
+ LT_DLFREE (name);
+ LT_DLFREE (canonical);
+
+ return errors;
+}
+
+lt_dlhandle
+lt_dlopen (filename)
+ const char *filename;
+{
+ lt_dlhandle handle = 0;
+
+ /* Just incase we missed a code path in try_dlopen() that reports
+ an error, but forgets to reset handle... */
+ if (try_dlopen (&handle, filename) != 0)
+ return 0;
+
+ return handle;
+}
+
+/* If the last error messge store was `FILE_NOT_FOUND', then return
+ non-zero. */
+static int
+file_not_found ()
+{
+ const char *error = 0;
+
+ LT_DLMUTEX_GETERROR (error);
+ if (error == LT_DLSTRERROR (FILE_NOT_FOUND))
+ return 1;
+
+ return 0;
}
+/* If FILENAME has an ARCHIVE_EXT or SHLIB_EXT extension, try to
+ open the FILENAME as passed. Otherwise try appending ARCHIVE_EXT,
+ and if a file is still not found try again with SHLIB_EXT appended
+ instead. */
lt_dlhandle
lt_dlopenext (filename)
- const char *filename;
+ const char *filename;
{
- lt_dlhandle handle;
- char *tmp;
- int len;
- const char *saved_error = last_error;
-
- if (!filename)
- return lt_dlopen(filename);
- len = strlen(filename);
- if (!len) {
- last_error = LT_DLSTRERROR(FILE_NOT_FOUND);
- return 0;
- }
- /* try the normal file name */
- handle = lt_dlopen(filename);
- if (handle)
- return handle;
- /* try "filename.la" */
- tmp = (char*) lt_dlmalloc(len+4);
- if (!tmp) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 0;
- }
- strcpy(tmp, filename);
- strcat(tmp, ".la");
- handle = lt_dlopen(tmp);
- if (handle) {
- last_error = saved_error;
- lt_dlfree(tmp);
- return handle;
- }
+ lt_dlhandle handle = 0;
+ char * tmp = 0;
+ char * ext = 0;
+ size_t len;
+ int errors = 0;
+
+ if (!filename)
+ {
+ return lt_dlopen (filename);
+ }
+
+ assert (filename);
+
+ len = LT_STRLEN (filename);
+ ext = strrchr (filename, '.');
+
+ /* If FILENAME already bears a suitable extension, there is no need
+ to try appending additional extensions. */
+ if (ext && ((strcmp (ext, archive_ext) == 0)
#ifdef LTDL_SHLIB_EXT
- /* try "filename.EXT" */
- if (strlen(shlib_ext) > 3) {
- lt_dlfree(tmp);
- tmp = (char*) lt_dlmalloc(len + strlen(shlib_ext) + 1);
- if (!tmp) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 0;
- }
- strcpy(tmp, filename);
- } else
- tmp[len] = '\0';
- strcat(tmp, shlib_ext);
- handle = lt_dlopen(tmp);
- if (handle) {
- last_error = saved_error;
- lt_dlfree(tmp);
- return handle;
- }
-#endif
- last_error = LT_DLSTRERROR(FILE_NOT_FOUND);
- lt_dlfree(tmp);
+ || (strcmp (ext, shlib_ext) == 0)
+#endif
+ ))
+ {
+ return lt_dlopen (filename);
+ }
+
+ /* First try appending ARCHIVE_EXT. */
+ tmp = LT_EMALLOC (char, len + LT_STRLEN (archive_ext) + 1);
+ if (!tmp)
+ return 0;
+
+ strcpy (tmp, filename);
+ strcat (tmp, archive_ext);
+ errors = try_dlopen (&handle, tmp);
+
+ /* If we found FILENAME, stop searching -- whether we were able to
+ load the file as a module or not. If the file exists but loading
+ failed, it is better to return an error message here than to
+ report FILE_NOT_FOUND when the alternatives (foo.so etc) are not
+ in the module search path. */
+ if (handle || ((errors > 0) && !file_not_found ()))
+ {
+ LT_DLFREE (tmp);
+ return handle;
+ }
+
+#ifdef LTDL_SHLIB_EXT
+ /* Try appending SHLIB_EXT. */
+ if (LT_STRLEN (shlib_ext) > LT_STRLEN (archive_ext))
+ {
+ LT_DLFREE (tmp);
+ tmp = LT_EMALLOC (char, len + LT_STRLEN (shlib_ext) + 1);
+ if (!tmp)
return 0;
+
+ strcpy (tmp, filename);
+ }
+ else
+ {
+ tmp[len] = LT_EOS_CHAR;
+ }
+
+ strcat(tmp, shlib_ext);
+ errors = try_dlopen (&handle, tmp);
+
+ /* As before, if the file was found but loading failed, return now
+ with the current error message. */
+ if (handle || ((errors > 0) && !file_not_found ()))
+ {
+ LT_DLFREE (tmp);
+ return handle;
+ }
+#endif
+
+ /* Still here? Then we really did fail to locate any of the file
+ names we tried. */
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND));
+ LT_DLFREE (tmp);
+ return 0;
+}
+
+
+static int
+lt_argz_insert (pargz, pargz_len, before, entry)
+ char **pargz;
+ size_t *pargz_len;
+ char *before;
+ const char *entry;
+{
+ error_t error;
+
+ if ((error = argz_insert (pargz, pargz_len, before, entry)))
+ {
+ switch (error)
+ {
+ case ENOMEM:
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY));
+ break;
+ default:
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN));
+ break;
+ }
+ return 1;
+ }
+
+ return 0;
+}
+
+static int
+lt_argz_insertinorder (pargz, pargz_len, entry)
+ char **pargz;
+ size_t *pargz_len;
+ const char *entry;
+{
+ char *before = 0;
+
+ assert (pargz);
+ assert (pargz_len);
+ assert (entry && *entry);
+
+ if (*pargz)
+ while ((before = argz_next (*pargz, *pargz_len, before)))
+ {
+ int cmp = strcmp (entry, before);
+
+ if (cmp < 0) break;
+ if (cmp == 0) return 0; /* No duplicates! */
+ }
+
+ return lt_argz_insert (pargz, pargz_len, before, entry);
+}
+
+static int
+lt_argz_insertdir (pargz, pargz_len, dirnam, dp)
+ char **pargz;
+ size_t *pargz_len;
+ const char *dirnam;
+ struct dirent *dp;
+{
+ char *buf = 0;
+ size_t buf_len = 0;
+ char *end = 0;
+ size_t end_offset = 0;
+ size_t dir_len = 0;
+ int errors = 0;
+
+ assert (pargz);
+ assert (pargz_len);
+ assert (dp);
+
+ dir_len = LT_STRLEN (dirnam);
+ end = dp->d_name + LT_D_NAMLEN(dp);
+
+ /* Ignore version numbers. */
+ {
+ char *p;
+ for (p = end; p -1 > dp->d_name; --p)
+ if (strchr (".0123456789", p[-1]) == 0)
+ break;
+
+ if (*p == '.')
+ end = p;
+ }
+
+ /* Ignore filename extension. */
+ {
+ char *p;
+ for (p = end -1; p > dp->d_name; --p)
+ if (*p == '.')
+ {
+ end = p;
+ break;
+ }
+ }
+
+ /* Prepend the directory name. */
+ end_offset = end - dp->d_name;
+ buf_len = dir_len + 1+ end_offset;
+ buf = LT_EMALLOC (char, 1+ buf_len);
+ if (!buf)
+ return ++errors;
+
+ assert (buf);
+
+ strcpy (buf, dirnam);
+ strcat (buf, "/");
+ strncat (buf, dp->d_name, end_offset);
+ buf[buf_len] = LT_EOS_CHAR;
+
+ /* Try to insert (in order) into ARGZ/ARGZ_LEN. */
+ if (lt_argz_insertinorder (pargz, pargz_len, buf) != 0)
+ ++errors;
+
+ LT_DLFREE (buf);
+
+ return errors;
+}
+
+static int
+list_files_by_dir (dirnam, pargz, pargz_len)
+ const char *dirnam;
+ char **pargz;
+ size_t *pargz_len;
+{
+ DIR *dirp = 0;
+ int errors = 0;
+
+ assert (dirnam && *dirnam);
+ assert (pargz);
+ assert (pargz_len);
+ assert (dirnam[LT_STRLEN(dirnam) -1] != '/');
+
+ dirp = opendir (dirnam);
+ if (dirp)
+ {
+ struct dirent *dp = 0;
+
+ while ((dp = readdir (dirp)))
+ if (dp->d_name[0] != '.')
+ if (lt_argz_insertdir (pargz, pargz_len, dirnam, dp))
+ {
+ ++errors;
+ break;
+ }
+
+ closedir (dirp);
+ }
+ else
+ ++errors;
+
+ return errors;
+}
+
+
+/* If there are any files in DIRNAME, call the function passed in
+ DATA1 (with the name of each file and DATA2 as arguments). */
+static int
+foreachfile_callback (dirname, data1, data2)
+ char *dirname;
+ lt_ptr data1;
+ lt_ptr data2;
+{
+ int (*func) LT_PARAMS((const char *filename, lt_ptr data))
+ = (int (*) LT_PARAMS((const char *filename, lt_ptr data))) data1;
+
+ int is_done = 0;
+ char *argz = 0;
+ size_t argz_len = 0;
+
+ if (list_files_by_dir (dirname, &argz, &argz_len) != 0)
+ goto cleanup;
+ if (!argz)
+ goto cleanup;
+
+ {
+ char *filename = 0;
+ while ((filename = argz_next (argz, argz_len, filename)))
+ if ((is_done = (*func) (filename, data2)))
+ break;
+ }
+
+ cleanup:
+ LT_DLFREE (argz);
+
+ return is_done;
+}
+
+
+/* Call FUNC for each unique extensionless file in SEARCH_PATH, along
+ with DATA. The filenames passed to FUNC would be suitable for
+ passing to lt_dlopenext. The extensions are stripped so that
+ individual modules do not generate several entries (e.g. libfoo.la,
+ libfoo.so, libfoo.so.1, libfoo.so.1.0.0). If SEARCH_PATH is NULL,
+ then the same directories that lt_dlopen would search are examined. */
+int
+lt_dlforeachfile (search_path, func, data)
+ const char *search_path;
+ int (*func) LT_PARAMS ((const char *filename, lt_ptr data));
+ lt_ptr data;
+{
+ int is_done = 0;
+
+ if (search_path)
+ {
+ /* If a specific path was passed, search only the directories
+ listed in it. */
+ is_done = foreach_dirinpath (search_path, 0,
+ foreachfile_callback, func, data);
+ }
+ else
+ {
+ /* Otherwise search the default paths. */
+ is_done = foreach_dirinpath (user_search_path, 0,
+ foreachfile_callback, func, data);
+ if (!is_done)
+ {
+ is_done = foreach_dirinpath (getenv("LTDL_LIBRARY_PATH"), 0,
+ foreachfile_callback, func, data);
+ }
+
+#ifdef LTDL_SHLIBPATH_VAR
+ if (!is_done)
+ {
+ is_done = foreach_dirinpath (getenv(LTDL_SHLIBPATH_VAR), 0,
+ foreachfile_callback, func, data);
+ }
+#endif
+#ifdef LTDL_SYSSEARCHPATH
+ if (!is_done)
+ {
+ is_done = foreach_dirinpath (getenv(LTDL_SYSSEARCHPATH), 0,
+ foreachfile_callback, func, data);
+ }
+#endif
+ }
+
+ return is_done;
}
int
lt_dlclose (handle)
- lt_dlhandle handle;
+ lt_dlhandle handle;
{
- lt_dlhandle cur, last;
-
- /* check whether the handle is valid */
- last = cur = handles;
- while (cur && handle != cur) {
- last = cur;
- cur = cur->next;
- }
- if (!cur) {
- last_error = LT_DLSTRERROR(INVALID_HANDLE);
- return 1;
- }
- handle->info.ref_count--;
- if (!handle->info.ref_count) {
- int error;
- lt_dlloader_data_t data = handle->loader->dlloader_data;
-
- if (handle != handles)
- last->next = handle->next;
- else
- handles = handle->next;
- error = handle->loader->module_close(data, handle->module);
- error += unload_deplibs(handle);
- if (handle->info.filename)
- lt_dlfree(handle->info.filename);
- if (handle->info.name)
- lt_dlfree(handle->info.name);
- lt_dlfree(handle);
- return error;
+ lt_dlhandle cur, last;
+ int errors = 0;
+
+ LT_DLMUTEX_LOCK ();
+
+ /* check whether the handle is valid */
+ last = cur = handles;
+ while (cur && handle != cur)
+ {
+ last = cur;
+ cur = cur->next;
+ }
+
+ if (!cur)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
+ ++errors;
+ goto done;
+ }
+
+ handle->info.ref_count--;
+
+ /* Note that even with resident modules, we must track the ref_count
+ correctly incase the user decides to reset the residency flag
+ later (even though the API makes no provision for that at the
+ moment). */
+ if (handle->info.ref_count <= 0 && !LT_DLIS_RESIDENT (handle))
+ {
+ lt_user_data data = handle->loader->dlloader_data;
+
+ if (handle != handles)
+ {
+ last->next = handle->next;
}
- return 0;
+ else
+ {
+ handles = handle->next;
+ }
+
+ errors += handle->loader->module_close (data, handle->module);
+ errors += unload_deplibs(handle);
+
+ /* It is up to the callers to free the data itself. */
+ LT_DLFREE (handle->caller_data);
+
+ LT_DLFREE (handle->info.filename);
+ LT_DLFREE (handle->info.name);
+ LT_DLFREE (handle);
+
+ goto done;
+ }
+
+ if (LT_DLIS_RESIDENT (handle))
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CLOSE_RESIDENT_MODULE));
+ ++errors;
+ }
+
+ done:
+ LT_DLMUTEX_UNLOCK ();
+
+ return errors;
}
-lt_ptr_t
+lt_ptr
lt_dlsym (handle, symbol)
- lt_dlhandle handle;
- const char *symbol;
+ lt_dlhandle handle;
+ const char *symbol;
{
- int lensym;
- char lsym[LTDL_SYMBOL_LENGTH];
- char *sym;
- lt_ptr_t address;
- lt_dlloader_data_t data;
-
- if (!handle) {
- last_error = LT_DLSTRERROR(INVALID_HANDLE);
- return 0;
- }
- if (!symbol) {
- last_error = LT_DLSTRERROR(SYMBOL_NOT_FOUND);
- return 0;
- }
- lensym = strlen(symbol);
- if (handle->loader->sym_prefix)
- lensym += strlen(handle->loader->sym_prefix);
- if (handle->info.name)
- lensym += strlen(handle->info.name);
- if (lensym + LTDL_SYMBOL_OVERHEAD < LTDL_SYMBOL_LENGTH)
- sym = lsym;
- else
- sym = (char*) lt_dlmalloc(lensym + LTDL_SYMBOL_OVERHEAD + 1);
- if (!sym) {
- last_error = LT_DLSTRERROR(BUFFER_OVERFLOW);
- return 0;
- }
- data = handle->loader->dlloader_data;
- if (handle->info.name) {
- const char *saved_error = last_error;
-
- /* this is a libtool module */
- if (handle->loader->sym_prefix) {
- strcpy(sym, handle->loader->sym_prefix);
- strcat(sym, handle->info.name);
- } else
- strcpy(sym, handle->info.name);
- strcat(sym, "_LTX_");
- strcat(sym, symbol);
- /* try "modulename_LTX_symbol" */
- address = handle->loader->find_sym(data, handle->module, sym);
- if (address) {
- if (sym != lsym)
- lt_dlfree(sym);
- return address;
- }
- last_error = saved_error;
+ size_t lensym;
+ char lsym[LT_SYMBOL_LENGTH];
+ char *sym;
+ lt_ptr address;
+ lt_user_data data;
+
+ if (!handle)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
+ return 0;
+ }
+
+ if (!symbol)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND));
+ return 0;
+ }
+
+ lensym = LT_STRLEN (symbol) + LT_STRLEN (handle->loader->sym_prefix)
+ + LT_STRLEN (handle->info.name);
+
+ if (lensym + LT_SYMBOL_OVERHEAD < LT_SYMBOL_LENGTH)
+ {
+ sym = lsym;
+ }
+ else
+ {
+ sym = LT_EMALLOC (char, lensym + LT_SYMBOL_OVERHEAD + 1);
+ if (!sym)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (BUFFER_OVERFLOW));
+ return 0;
}
- /* otherwise try "symbol" */
- if (handle->loader->sym_prefix) {
- strcpy(sym, handle->loader->sym_prefix);
- strcat(sym, symbol);
- } else
- strcpy(sym, symbol);
- address = handle->loader->find_sym(data, handle->module, sym);
- if (sym != lsym)
- lt_dlfree(sym);
- return address;
+ }
+
+ data = handle->loader->dlloader_data;
+ if (handle->info.name)
+ {
+ const char *saved_error;
+
+ LT_DLMUTEX_GETERROR (saved_error);
+
+ /* this is a libtool module */
+ if (handle->loader->sym_prefix)
+ {
+ strcpy(sym, handle->loader->sym_prefix);
+ strcat(sym, handle->info.name);
+ }
+ else
+ {
+ strcpy(sym, handle->info.name);
+ }
+
+ strcat(sym, "_LTX_");
+ strcat(sym, symbol);
+
+ /* try "modulename_LTX_symbol" */
+ address = handle->loader->find_sym (data, handle->module, sym);
+ if (address)
+ {
+ if (sym != lsym)
+ {
+ LT_DLFREE (sym);
+ }
+ return address;
+ }
+ LT_DLMUTEX_SETERROR (saved_error);
+ }
+
+ /* otherwise try "symbol" */
+ if (handle->loader->sym_prefix)
+ {
+ strcpy(sym, handle->loader->sym_prefix);
+ strcat(sym, symbol);
+ }
+ else
+ {
+ strcpy(sym, symbol);
+ }
+
+ address = handle->loader->find_sym (data, handle->module, sym);
+ if (sym != lsym)
+ {
+ LT_DLFREE (sym);
+ }
+
+ return address;
}
const char *
-lt_dlerror LTDL_PARAMS((void))
+lt_dlerror ()
{
- const char *error = last_error;
-
- last_error = 0;
- return error;
+ const char *error;
+
+ LT_DLMUTEX_GETERROR (error);
+ LT_DLMUTEX_SETERROR (0);
+
+ return error ? error : LT_DLSTRERROR (UNKNOWN);
+}
+
+static int
+lt_dlpath_insertdir (ppath, before, dir)
+ char **ppath;
+ char *before;
+ const char *dir;
+{
+ int errors = 0;
+ char *canonical = 0;
+ char *argz = 0;
+ size_t argz_len = 0;
+
+ assert (ppath);
+ assert (dir && *dir);
+
+ if (canonicalize_path (dir, &canonical) != 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ assert (canonical && *canonical);
+
+ /* If *PPATH is empty, set it to DIR. */
+ if (*ppath == 0)
+ {
+ assert (!before); /* BEFORE cannot be set without PPATH. */
+ assert (dir); /* Without DIR, don't call this function! */
+
+ *ppath = lt_estrdup (dir);
+ if (*ppath == 0)
+ ++errors;
+
+ return errors;
+ }
+
+ assert (ppath && *ppath);
+
+ if (argzize_path (*ppath, &argz, &argz_len) != 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ /* Convert BEFORE into an equivalent offset into ARGZ. This only works
+ if *PPATH is already canonicalized, and hence does not change length
+ with respect to ARGZ. We canonicalize each entry as it is added to
+ the search path, and don't call this function with (uncanonicalized)
+ user paths, so this is a fair assumption. */
+ if (before)
+ {
+ assert (*ppath <= before);
+ assert (before - *ppath <= strlen (*ppath));
+
+ before = before - *ppath + argz;
+ }
+
+ if (lt_argz_insert (&argz, &argz_len, before, dir) != 0)
+ {
+ ++errors;
+ goto cleanup;
+ }
+
+ argz_stringify (argz, argz_len, LT_PATHSEP_CHAR);
+ LT_DLMEM_REASSIGN (*ppath, argz);
+
+ cleanup:
+ LT_DLFREE (canonical);
+ LT_DLFREE (argz);
+
+ return errors;
}
int
lt_dladdsearchdir (search_dir)
- const char *search_dir;
-{
- if (!search_dir || !strlen(search_dir))
- return 0;
- if (!user_search_path) {
- user_search_path = strdup(search_dir);
- if (!user_search_path) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- } else {
- char *new_search_path = (char*)
- lt_dlmalloc(strlen(user_search_path) +
- strlen(search_dir) + 2); /* ':' + '\0' == 2 */
- if (!new_search_path) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- sprintf (new_search_path, "%s%c%s", user_search_path,
- LTDL_PATHSEP_CHAR, search_dir);
- lt_dlfree(user_search_path);
- user_search_path = new_search_path;
+ const char *search_dir;
+{
+ int errors = 0;
+
+ if (search_dir && *search_dir)
+ {
+ LT_DLMUTEX_LOCK ();
+ if (lt_dlpath_insertdir (&user_search_path, 0, search_dir) != 0)
+ ++errors;
+ LT_DLMUTEX_UNLOCK ();
+ }
+
+ return errors;
+}
+
+int
+lt_dlinsertsearchdir (before, search_dir)
+ const char *before;
+ const char *search_dir;
+{
+ int errors = 0;
+
+ if (before)
+ {
+ LT_DLMUTEX_LOCK ();
+ if ((before < user_search_path)
+ || (before >= user_search_path + LT_STRLEN (user_search_path)))
+ {
+ LT_DLMUTEX_UNLOCK ();
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_POSITION));
+ return 1;
}
- return 0;
+ LT_DLMUTEX_UNLOCK ();
+ }
+
+ if (search_dir && *search_dir)
+ {
+ LT_DLMUTEX_LOCK ();
+ if (lt_dlpath_insertdir (&user_search_path,
+ (char *) before, search_dir) != 0)
+ {
+ ++errors;
+ }
+ LT_DLMUTEX_UNLOCK ();
+ }
+
+ return errors;
}
int
lt_dlsetsearchpath (search_path)
- const char *search_path;
-{
- if (user_search_path)
- lt_dlfree(user_search_path);
- user_search_path = 0; /* reset the search path */
- if (!search_path || !strlen(search_path))
- return 0;
- user_search_path = strdup(search_path);
- if (!user_search_path)
- return 1;
- return 0;
+ const char *search_path;
+{
+ int errors = 0;
+
+ LT_DLMUTEX_LOCK ();
+ LT_DLFREE (user_search_path);
+ LT_DLMUTEX_UNLOCK ();
+
+ if (!search_path || !LT_STRLEN (search_path))
+ {
+ return errors;
+ }
+
+ LT_DLMUTEX_LOCK ();
+ if (canonicalize_path (search_path, &user_search_path) != 0)
+ ++errors;
+ LT_DLMUTEX_UNLOCK ();
+
+ return errors;
}
const char *
-lt_dlgetsearchpath LTDL_PARAMS((void))
+lt_dlgetsearchpath ()
{
- return user_search_path;
+ const char *saved_path;
+
+ LT_DLMUTEX_LOCK ();
+ saved_path = user_search_path;
+ LT_DLMUTEX_UNLOCK ();
+
+ return saved_path;
}
-const lt_dlinfo *
-lt_dlgetinfo (handle)
- lt_dlhandle handle;
+int
+lt_dlmakeresident (handle)
+ lt_dlhandle handle;
{
- if (!handle) {
- last_error = LT_DLSTRERROR(INVALID_HANDLE);
- return 0;
- }
- return &(handle->info);
+ int errors = 0;
+
+ if (!handle)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
+ ++errors;
+ }
+ else
+ {
+ LT_DLSET_FLAG (handle, LT_DLRESIDENT_FLAG);
+ }
+
+ return errors;
}
int
-lt_dlforeach (func, data)
- int (*func) LTDL_PARAMS((lt_dlhandle handle, lt_ptr_t data));
- lt_ptr_t data;
+lt_dlisresident (handle)
+ lt_dlhandle handle;
{
- lt_dlhandle cur = handles;
- while (cur) {
- lt_dlhandle tmp = cur;
- cur = cur->next;
- if (func(tmp, data))
- return 1;
- }
- return 0;
+ if (!handle)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
+ return -1;
+ }
+
+ return LT_DLIS_RESIDENT (handle);
}
-int
-lt_dlloader_add (place, dlloader, loader_name)
- lt_dlloader_t *place;
- const struct lt_user_dlloader *dlloader;
- const char *loader_name;
+
+
+
+/* --- MODULE INFORMATION --- */
+
+const lt_dlinfo *
+lt_dlgetinfo (handle)
+ lt_dlhandle handle;
{
- lt_dlloader_t *node = 0, *ptr = 0;
-
- if ((dlloader == 0) /* diagnose null parameters */
- || (dlloader->module_open == 0)
- || (dlloader->module_close == 0)
- || (dlloader->find_sym == 0)) {
- last_error = LT_DLSTRERROR(INVALID_LOADER);
- return 1;
- }
-
- /* Create a new dlloader node with copies of the user callbacks. */
- node = (lt_dlloader_t *) lt_dlmalloc (sizeof (lt_dlloader_t));
- if (node == 0) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return 1;
- }
- node->next = 0;
- node->loader_name = loader_name;
- node->sym_prefix = dlloader->sym_prefix;
- node->dlloader_exit = dlloader->dlloader_exit;
- node->module_open = dlloader->module_open;
- node->module_close = dlloader->module_close;
- node->find_sym = dlloader->find_sym;
- node->dlloader_data = dlloader->dlloader_data;
-
- if (!loaders)
- /* If there are no loaders, NODE becomes the list! */
- loaders = node;
- else if (!place) {
- /* If PLACE is not set, add NODE to the end of the
- LOADERS list. */
- for (ptr = loaders; ptr->next; ptr = ptr->next)
- /*NOWORK*/;
- ptr->next = node;
- } else if (loaders == place) {
- /* If PLACE is the first loader, NODE goes first. */
- node->next = place;
- loaders = node;
- } else {
- /* Find the node immediately preceding PLACE. */
- for (ptr = loaders; ptr->next != place; ptr = ptr->next)
- /*NOWORK*/;
-
- if (ptr->next != place) {
- last_error = LT_DLSTRERROR(INVALID_LOADER);
- return 1;
- }
+ if (!handle)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE));
+ return 0;
+ }
- /* Insert NODE between PTR and PLACE. */
- node->next = place;
- ptr->next = node;
- }
+ return &(handle->info);
+}
- return 0;
+lt_dlhandle
+lt_dlhandle_next (place)
+ lt_dlhandle place;
+{
+ return place ? place->next : handles;
}
int
-lt_dlloader_remove (loader_name)
- const char *loader_name;
+lt_dlforeach (func, data)
+ int (*func) LT_PARAMS((lt_dlhandle handle, lt_ptr data));
+ lt_ptr data;
{
- lt_dlloader_t *place = lt_dlloader_find (loader_name);
- lt_dlhandle handle;
- int result = 0;
+ int errors = 0;
+ lt_dlhandle cur;
- if (!place) {
- last_error = LT_DLSTRERROR(INVALID_LOADER);
- return 1;
- }
+ LT_DLMUTEX_LOCK ();
- /* Fail if there are any open modules which use this loader. */
- for (handle = handles; handle; handle = handle->next)
- if (handle->loader == place) {
- last_error = LT_DLSTRERROR(REMOVE_LOADER);
- return 1;
- }
-
- if (place == loaders)
- /* PLACE is the first loader in the list. */
- loaders = loaders->next;
- else {
- /* Find the loader before the one being removed. */
- lt_dlloader_t *prev;
- for (prev = loaders; prev->next; prev = prev->next)
- if (!strcmp (prev->next->loader_name, loader_name))
- break;
+ cur = handles;
+ while (cur)
+ {
+ lt_dlhandle tmp = cur;
- place = prev->next;
- prev->next = prev->next->next;
+ cur = cur->next;
+ if ((*func) (tmp, data))
+ {
+ ++errors;
+ break;
}
- if (place->dlloader_exit)
- result = place->dlloader_exit (place->dlloader_data);
- lt_dlfree (place);
+ }
- return result;
+ LT_DLMUTEX_UNLOCK ();
+
+ return errors;
}
-lt_dlloader_t *
-lt_dlloader_next (place)
- lt_dlloader_t *place;
+lt_dlcaller_id
+lt_dlcaller_register ()
{
- return place ? place->next : loaders;
+ static lt_dlcaller_id last_caller_id = 0;
+ int result;
+
+ LT_DLMUTEX_LOCK ();
+ result = ++last_caller_id;
+ LT_DLMUTEX_UNLOCK ();
+
+ return result;
}
-
-const char *
-lt_dlloader_name (place)
- lt_dlloader_t *place;
-{
- if (!place)
- last_error = LT_DLSTRERROR(INVALID_LOADER);
- return place ? place->loader_name : 0;
-}
-lt_dlloader_data_t *
-lt_dlloader_data (place)
- lt_dlloader_t *place;
+lt_ptr
+lt_dlcaller_set_data (key, handle, data)
+ lt_dlcaller_id key;
+ lt_dlhandle handle;
+ lt_ptr data;
{
- if (!place)
- last_error = LT_DLSTRERROR(INVALID_LOADER);
- return place ? &(place->dlloader_data) : 0;
-}
+ int n_elements = 0;
+ lt_ptr stale = (lt_ptr) 0;
+ int i;
+
+ /* This needs to be locked so that the caller data can be updated
+ simultaneously by different threads. */
+ LT_DLMUTEX_LOCK ();
+
+ if (handle->caller_data)
+ while (handle->caller_data[n_elements].key)
+ ++n_elements;
+
+ for (i = 0; i < n_elements; ++i)
+ {
+ if (handle->caller_data[i].key == key)
+ {
+ stale = handle->caller_data[i].data;
+ break;
+ }
+ }
+
+ /* Ensure that there is enough room in this handle's caller_data
+ array to accept a new element (and an empty end marker). */
+ if (i == n_elements)
+ {
+ lt_caller_data *temp
+ = LT_DLREALLOC (lt_caller_data, handle->caller_data, 2+ n_elements);
+
+ if (!temp)
+ {
+ stale = 0;
+ goto done;
+ }
-lt_dlloader_t *
-lt_dlloader_find (loader_name)
- const char *loader_name;
-{
- lt_dlloader_t *place = 0;
+ handle->caller_data = temp;
- for (place = loaders; place; place = place->next)
- if (strcmp (place->loader_name, loader_name) == 0)
- break;
+ /* We only need this if we needed to allocate a new caller_data. */
+ handle->caller_data[i].key = key;
+ handle->caller_data[1+ i].key = 0;
+ }
- return place;
+ handle->caller_data[i].data = data;
+
+ done:
+ LT_DLMUTEX_UNLOCK ();
+
+ return stale;
}
-static const char **user_error_strings = 0;
-static int errorcode = LTDL_ERROR_MAX;
+lt_ptr
+lt_dlcaller_get_data (key, handle)
+ lt_dlcaller_id key;
+ lt_dlhandle handle;
+{
+ lt_ptr result = (lt_ptr) 0;
+
+ /* This needs to be locked so that the caller data isn't updated by
+ another thread part way through this function. */
+ LT_DLMUTEX_LOCK ();
+
+ /* Locate the index of the element with a matching KEY. */
+ {
+ int i;
+ for (i = 0; handle->caller_data[i].key; ++i)
+ {
+ if (handle->caller_data[i].key == key)
+ {
+ result = handle->caller_data[i].data;
+ break;
+ }
+ }
+ }
+
+ LT_DLMUTEX_UNLOCK ();
+
+ return result;
+}
+
+
+
+/* --- USER MODULE LOADER API --- */
+
int
-lt_dladderror (diagnostic)
- const char *diagnostic;
+lt_dlloader_add (place, dlloader, loader_name)
+ lt_dlloader *place;
+ const struct lt_user_dlloader *dlloader;
+ const char *loader_name;
{
- int index = errorcode - LTDL_ERROR_MAX;
- const char **temp = 0;
+ int errors = 0;
+ lt_dlloader *node = 0, *ptr = 0;
+
+ if ((dlloader == 0) /* diagnose null parameters */
+ || (dlloader->module_open == 0)
+ || (dlloader->module_close == 0)
+ || (dlloader->find_sym == 0))
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
+ return 1;
+ }
+
+ /* Create a new dlloader node with copies of the user callbacks. */
+ node = LT_EMALLOC (lt_dlloader, 1);
+ if (!node)
+ return 1;
+
+ node->next = 0;
+ node->loader_name = loader_name;
+ node->sym_prefix = dlloader->sym_prefix;
+ node->dlloader_exit = dlloader->dlloader_exit;
+ node->module_open = dlloader->module_open;
+ node->module_close = dlloader->module_close;
+ node->find_sym = dlloader->find_sym;
+ node->dlloader_data = dlloader->dlloader_data;
+
+ LT_DLMUTEX_LOCK ();
+ if (!loaders)
+ {
+ /* If there are no loaders, NODE becomes the list! */
+ loaders = node;
+ }
+ else if (!place)
+ {
+ /* If PLACE is not set, add NODE to the end of the
+ LOADERS list. */
+ for (ptr = loaders; ptr->next; ptr = ptr->next)
+ {
+ /*NOWORK*/;
+ }
- /* realloc is not entirely portable, so simulate it using
- lt_dlmalloc and lt_dlfree. */
- temp = (const char **) lt_dlmalloc ((1+index) * sizeof(const char*));
- if (temp == 0) {
- last_error = LT_DLSTRERROR(NO_MEMORY);
- return -1;
+ ptr->next = node;
+ }
+ else if (loaders == place)
+ {
+ /* If PLACE is the first loader, NODE goes first. */
+ node->next = place;
+ loaders = node;
+ }
+ else
+ {
+ /* Find the node immediately preceding PLACE. */
+ for (ptr = loaders; ptr->next != place; ptr = ptr->next)
+ {
+ /*NOWORK*/;
}
- /* Build the new vector in the memory addressed by temp. */
- temp[index] = diagnostic;
- while (--index >= 0)
- temp[index] = user_error_strings[index];
+ if (ptr->next != place)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
+ ++errors;
+ }
+ else
+ {
+ /* Insert NODE between PTR and PLACE. */
+ node->next = place;
+ ptr->next = node;
+ }
+ }
+
+ LT_DLMUTEX_UNLOCK ();
- lt_dlfree (user_error_strings);
- user_error_strings = temp;
- return errorcode++;
+ return errors;
}
int
-lt_dlseterror (index)
- int index;
+lt_dlloader_remove (loader_name)
+ const char *loader_name;
{
- if (index >= errorcode || index < 0) {
- last_error = LT_DLSTRERROR(INVALID_ERRORCODE);
- return 1;
+ lt_dlloader *place = lt_dlloader_find (loader_name);
+ lt_dlhandle handle;
+ int errors = 0;
+
+ if (!place)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
+ return 1;
+ }
+
+ LT_DLMUTEX_LOCK ();
+
+ /* Fail if there are any open modules which use this loader. */
+ for (handle = handles; handle; handle = handle->next)
+ {
+ if (handle->loader == place)
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (REMOVE_LOADER));
+ ++errors;
+ goto done;
+ }
+ }
+
+ if (place == loaders)
+ {
+ /* PLACE is the first loader in the list. */
+ loaders = loaders->next;
+ }
+ else
+ {
+ /* Find the loader before the one being removed. */
+ lt_dlloader *prev;
+ for (prev = loaders; prev->next; prev = prev->next)
+ {
+ if (!strcmp (prev->next->loader_name, loader_name))
+ {
+ break;
+ }
}
-
- if (index < LTDL_ERROR_MAX)
- last_error = ltdl_error_strings[errorcode];
- else
- last_error = user_error_strings[errorcode - LTDL_ERROR_MAX];
- return 0;
+ place = prev->next;
+ prev->next = prev->next->next;
+ }
+
+ if (place->dlloader_exit)
+ {
+ errors = place->dlloader_exit (place->dlloader_data);
+ }
+
+ LT_DLFREE (place);
+
+ done:
+ LT_DLMUTEX_UNLOCK ();
+
+ return errors;
+}
+
+lt_dlloader *
+lt_dlloader_next (place)
+ lt_dlloader *place;
+{
+ lt_dlloader *next;
+
+ LT_DLMUTEX_LOCK ();
+ next = place ? place->next : loaders;
+ LT_DLMUTEX_UNLOCK ();
+
+ return next;
+}
+
+const char *
+lt_dlloader_name (place)
+ lt_dlloader *place;
+{
+ const char *name = 0;
+
+ if (place)
+ {
+ LT_DLMUTEX_LOCK ();
+ name = place ? place->loader_name : 0;
+ LT_DLMUTEX_UNLOCK ();
+ }
+ else
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
+ }
+
+ return name;
+}
+
+lt_user_data *
+lt_dlloader_data (place)
+ lt_dlloader *place;
+{
+ lt_user_data *data = 0;
+
+ if (place)
+ {
+ LT_DLMUTEX_LOCK ();
+ data = place ? &(place->dlloader_data) : 0;
+ LT_DLMUTEX_UNLOCK ();
+ }
+ else
+ {
+ LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER));
+ }
+
+ return data;
+}
+
+lt_dlloader *
+lt_dlloader_find (loader_name)
+ const char *loader_name;
+{
+ lt_dlloader *place = 0;
+
+ LT_DLMUTEX_LOCK ();
+ for (place = loaders; place; place = place->next)
+ {
+ if (strcmp (place->loader_name, loader_name) == 0)
+ {
+ break;
+ }
+ }
+ LT_DLMUTEX_UNLOCK ();
+
+ return place;
}