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// natFileDescriptor.cc - Native part of FileDescriptor class.
/* Copyright (C) 1998, 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <fcntl.h>
#ifdef HAVE_SYS_IOCTL_H
#define BSD_COMP /* Get FIONREAD on Solaris2. */
#include <sys/ioctl.h>
#endif
// Pick up FIONREAD on Solaris 2.5.
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#include <cni.h>
#include <jvm.h>
#include <java/io/FileDescriptor.h>
#include <java/io/SyncFailedException.h>
#include <java/io/IOException.h>
#include <java/io/InterruptedIOException.h>
#include <java/io/EOFException.h>
#include <java/lang/ArrayIndexOutOfBoundsException.h>
#include <java/lang/NullPointerException.h>
#include <java/lang/String.h>
#include <java/lang/Thread.h>
#include <java/io/FileNotFoundException.h>
#define NO_FSYNC_MESSAGE "sync unsupported"
jboolean
java::io::FileDescriptor::valid (void)
{
struct stat sb;
return ::fstat (fd, &sb) == 0;
}
void
java::io::FileDescriptor::sync (void)
{
// Some files don't support fsync. We don't bother reporting these
// as errors.
#ifdef HAVE_FSYNC
if (::fsync (fd) && errno != EROFS && errno != EINVAL)
JvThrow (new SyncFailedException (JvNewStringLatin1 (strerror (errno))));
#else
JvThrow (new SyncFailedException (JvNewStringLatin1 (NO_FSYNC_MESSAGE)));
#endif
}
jint
java::io::FileDescriptor::open (jstring path, jint jflags)
{
// FIXME: eww.
char buf[MAXPATHLEN];
jsize total = JvGetStringUTFRegion (path, 0, path->length(), buf);
// FIXME?
buf[total] = '\0';
int flags = 0;
#ifdef O_BINARY
flags |= O_BINARY;
#endif
JvAssert ((jflags & READ) || (jflags & WRITE));
if ((jflags & READ) && (jflags & WRITE))
flags |= O_RDWR;
else if ((jflags & READ))
flags |= O_RDONLY;
else
{
flags |= O_WRONLY | O_CREAT;
if ((jflags & APPEND))
flags |= O_APPEND;
else
flags |= O_TRUNC;
}
// FIXME: mode?
int fd = ::open (buf, flags, 0755);
if (fd == -1)
{
char msg[MAXPATHLEN + 200];
sprintf (msg, "%s: %s", buf, strerror (errno));
JvThrow (new FileNotFoundException (JvNewStringLatin1 (msg)));
}
return fd;
}
void
java::io::FileDescriptor::write (jint b)
{
jbyte d = (jbyte) b;
int r = ::write (fd, &d, 1);
if (java::lang::Thread::interrupted())
{
InterruptedIOException *iioe
= new InterruptedIOException (JvNewStringLatin1 ("write interrupted"));
iioe->bytesTransferred = r == -1 ? 0 : r;
JvThrow (iioe);
}
else if (r == -1)
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
// FIXME: loop if r != 1.
}
void
java::io::FileDescriptor::write (jbyteArray b, jint offset, jint len)
{
if (! b)
JvThrow (new java::lang::NullPointerException);
if (offset < 0 || len < 0 || offset + len > JvGetArrayLength (b))
JvThrow (new java::lang::ArrayIndexOutOfBoundsException);
jbyte *bytes = elements (b) + offset;
int r = ::write (fd, bytes, len);
if (java::lang::Thread::interrupted())
{
InterruptedIOException *iioe
= new InterruptedIOException (JvNewStringLatin1 ("write interrupted"));
iioe->bytesTransferred = r == -1 ? 0 : r;
JvThrow (iioe);
}
else if (r == -1)
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
// FIXME: loop if r != len.
}
void
java::io::FileDescriptor::close (void)
{
jint save = fd;
fd = -1;
if (::close (save))
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
}
jint
java::io::FileDescriptor::seek (jlong pos, jint whence)
{
JvAssert (whence == SET || whence == CUR);
jlong len = length ();
jlong here = getFilePointer ();
if ((whence == SET && pos > len) || (whence == CUR && here + pos > len))
JvThrow (new EOFException);
off_t r = ::lseek (fd, (off_t) pos, whence == SET ? SEEK_SET : SEEK_CUR);
if (r == -1)
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
return r;
}
jlong
java::io::FileDescriptor::length (void)
{
struct stat sb;
if (::fstat (fd, &sb))
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
return sb.st_size;
}
jlong
java::io::FileDescriptor::getFilePointer (void)
{
off_t r = ::lseek (fd, 0, SEEK_CUR);
if (r == -1)
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
return r;
}
jint
java::io::FileDescriptor::read (void)
{
jbyte b;
int r = ::read (fd, &b, 1);
if (r == 0)
return -1;
if (java::lang::Thread::interrupted())
{
InterruptedIOException *iioe
= new InterruptedIOException (JvNewStringLatin1 ("read interrupted"));
iioe->bytesTransferred = r == -1 ? 0 : r;
JvThrow (iioe);
}
else if (r == -1)
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
return b & 0xFF;
}
jint
java::io::FileDescriptor::read (jbyteArray buffer, jint offset, jint count)
{
if (! buffer)
JvThrow (new java::lang::NullPointerException);
jsize bsize = JvGetArrayLength (buffer);
if (offset < 0 || count < 0 || offset + count > bsize)
JvThrow (new java::lang::ArrayIndexOutOfBoundsException);
jbyte *bytes = elements (buffer) + offset;
int r = ::read (fd, bytes, count);
if (r == 0)
return -1;
if (java::lang::Thread::interrupted())
{
InterruptedIOException *iioe
= new InterruptedIOException (JvNewStringLatin1 ("read interrupted"));
iioe->bytesTransferred = r == -1 ? 0 : r;
JvThrow (iioe);
}
else if (r == -1)
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
return r;
}
jint
java::io::FileDescriptor::available (void)
{
#if defined (FIONREAD)
long num;
int r = ::ioctl (fd, FIONREAD, &num);
if (r == -1)
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
return (jint) num;
#elif defined (HAVE_SELECT)
int r = -1;
if (fd < 0)
errno = EBADF;
else
{
fd_set rd;
FD_ZERO (&rd);
FD_SET (fd, &rd);
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 0;
r = ::select (fd + 1, &rd, NULL, NULL, &tv);
}
if (r == -1)
JvThrow (new IOException (JvNewStringLatin1 (strerror (errno))));
return r == 0 ? 0 : 1;
#else
JvThrow (new IOException (JvNewStringLatin1 ("unimplemented")));
#endif
}
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