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Diffstat (limited to 'libiberty/pex-unix.c')
| -rw-r--r-- | libiberty/pex-unix.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/libiberty/pex-unix.c b/libiberty/pex-unix.c deleted file mode 100644 index 14fe71ed09c..00000000000 --- a/libiberty/pex-unix.c +++ /dev/null @@ -1,166 +0,0 @@ -/* Utilities to execute a program in a subprocess (possibly linked by pipes - with other subprocesses), and wait for it. Generic Unix version - (also used for UWIN and VMS). - Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003 - Free Software Foundation, Inc. - -This file is part of the libiberty library. -Libiberty is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public -License as published by the Free Software Foundation; either -version 2 of the License, or (at your option) any later version. - -Libiberty is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with libiberty; see the file COPYING.LIB. If not, -write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - -#include "pex-common.h" - -#include <stdio.h> -#include <errno.h> -#ifdef NEED_DECLARATION_ERRNO -extern int errno; -#endif -#ifdef HAVE_STRING_H -#include <string.h> -#endif -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif -#ifdef HAVE_STDLIB_H -#include <stdlib.h> -#endif -#ifdef HAVE_SYS_WAIT_H -#include <sys/wait.h> -#endif - -#ifndef HAVE_WAITPID -#define waitpid(pid, status, flags) wait(status) -#endif - -extern int execv (); -extern int execvp (); - -int -pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags) - const char *program; - char * const *argv; - const char *this_pname; - const char *temp_base ATTRIBUTE_UNUSED; - char **errmsg_fmt, **errmsg_arg; - int flags; -{ - int (*func)() = (flags & PEXECUTE_SEARCH ? execvp : execv); - int pid; - int pdes[2]; - int input_desc, output_desc; - int retries, sleep_interval; - /* Pipe waiting from last process, to be used as input for the next one. - Value is STDIN_FILE_NO if no pipe is waiting - (i.e. the next command is the first of a group). */ - static int last_pipe_input; - - /* If this is the first process, initialize. */ - if (flags & PEXECUTE_FIRST) - last_pipe_input = STDIN_FILE_NO; - - input_desc = last_pipe_input; - - /* If this isn't the last process, make a pipe for its output, - and record it as waiting to be the input to the next process. */ - if (! (flags & PEXECUTE_LAST)) - { - if (pipe (pdes) < 0) - { - *errmsg_fmt = "pipe"; - *errmsg_arg = NULL; - return -1; - } - output_desc = pdes[WRITE_PORT]; - last_pipe_input = pdes[READ_PORT]; - } - else - { - /* Last process. */ - output_desc = STDOUT_FILE_NO; - last_pipe_input = STDIN_FILE_NO; - } - - /* Fork a subprocess; wait and retry if it fails. */ - sleep_interval = 1; - pid = -1; - for (retries = 0; retries < 4; retries++) - { - pid = fork (); - if (pid >= 0) - break; - sleep (sleep_interval); - sleep_interval *= 2; - } - - switch (pid) - { - case -1: - *errmsg_fmt = "fork"; - *errmsg_arg = NULL; - return -1; - - case 0: /* child */ - /* Move the input and output pipes into place, if necessary. */ - if (input_desc != STDIN_FILE_NO) - { - close (STDIN_FILE_NO); - dup (input_desc); - close (input_desc); - } - if (output_desc != STDOUT_FILE_NO) - { - close (STDOUT_FILE_NO); - dup (output_desc); - close (output_desc); - } - - /* Close the parent's descs that aren't wanted here. */ - if (last_pipe_input != STDIN_FILE_NO) - close (last_pipe_input); - - /* Exec the program. */ - (*func) (program, argv); - - fprintf (stderr, "%s: ", this_pname); - fprintf (stderr, install_error_msg, program); - fprintf (stderr, ": %s\n", xstrerror (errno)); - exit (-1); - /* NOTREACHED */ - return 0; - - default: - /* In the parent, after forking. - Close the descriptors that we made for this child. */ - if (input_desc != STDIN_FILE_NO) - close (input_desc); - if (output_desc != STDOUT_FILE_NO) - close (output_desc); - - /* Return child's process number. */ - return pid; - } -} - -int -pwait (pid, status, flags) - int pid; - int *status; - int flags ATTRIBUTE_UNUSED; -{ - /* ??? Here's an opportunity to canonicalize the values in STATUS. - Needed? */ - pid = waitpid (pid, status, 0); - return pid; -} |