/* vi: set sw=4 ts=4:
*
- * Copyright (C) 2002 by Erik Andersen <andersen@uclibc.org>
- * Based in part on the files
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+/* Based in part on the files
* ./sysdeps/unix/sysv/linux/pwrite.c,
- * ./sysdeps/unix/sysv/linux/pread.c,
+ * ./sysdeps/unix/sysv/linux/pread.c,
* sysdeps/posix/pread.c
* sysdeps/posix/pwrite.c
* from GNU libc 2.2.5, but reworked considerably...
- *
- * This program 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.
- *
- * This program 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 this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#define _GNU_SOURCE
-#define _LARGEFILE64_SOURCE
-#include <features.h>
-#undef __OPTIMIZE__
-/* We absolutely do _NOT_ want interfaces silently
- * * * renamed under us or very bad things will happen... */
-#ifdef __USE_FILE_OFFSET64
-# undef __USE_FILE_OFFSET64
-#endif
-
-
-#include <errno.h>
-#include <sys/types.h>
#include <sys/syscall.h>
#include <unistd.h>
-#if ! defined __UCLIBC_HAS_LFS__
-#define off64_t off_t
+#ifndef __UCLIBC_HAS_LFS__
+# define off64_t off_t
#endif
#ifdef __NR_pread
-#define __NR___syscall_pread __NR_pread
-static inline _syscall4(ssize_t, __syscall_pread, int, fd,
+extern __typeof(pread) __libc_pread;
+# define __NR___syscall_pread __NR_pread
+static __inline__ _syscall4(ssize_t, __syscall_pread, int, fd,
void *, buf, size_t, count, off64_t, offset);
ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
-{
+{
return(__syscall_pread(fd, buf, count, (off64_t)offset));
}
-weak_alias (__libc_pread, pread)
+weak_alias(__libc_pread,pread)
-#if defined __UCLIBC_HAS_LFS__
+# ifdef __UCLIBC_HAS_LFS__
+extern __typeof(pread64) __libc_pread64;
ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
+{
return(__syscall_pread(fd, buf, count, offset));
}
-weak_alias (__libc_pread64, pread64)
-#endif /* __UCLIBC_HAS_LFS__ */
+weak_alias(__libc_pread64,pread64)
+# endif /* __UCLIBC_HAS_LFS__ */
#endif /* __NR_pread */
#ifdef __NR_pwrite
-#define __NR___syscall_pwrite __NR_pwrite
-static inline _syscall4(ssize_t, __syscall_pwrite, int, fd,
+extern __typeof(pwrite) __libc_pwrite;
+# define __NR___syscall_pwrite __NR_pwrite
+static __inline__ _syscall4(ssize_t, __syscall_pwrite, int, fd,
const void *, buf, size_t, count, off64_t, offset);
ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
-{
+{
return(__syscall_pwrite(fd, buf, count, (off64_t)offset));
}
-weak_alias (__libc_pwrite, pwrite)
+weak_alias(__libc_pwrite,pwrite)
-#if defined __UCLIBC_HAS_LFS__
+# ifdef __UCLIBC_HAS_LFS__
+extern __typeof(pwrite64) __libc_pwrite64;
ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
+{
return(__syscall_pwrite(fd, buf, count, offset));
}
-weak_alias (__libc_pwrite64, pwrite64)
-#endif /* __UCLIBC_HAS_LFS__ */
+weak_alias(__libc_pwrite64,pwrite64)
+# endif /* __UCLIBC_HAS_LFS__ */
#endif /* __NR_pwrite */
#if ! defined __NR_pread || ! defined __NR_pwrite
-static ssize_t __fake_pread_write(int fd, void *buf,
+libc_hidden_proto(read)
+libc_hidden_proto(write)
+libc_hidden_proto(lseek)
+
+static ssize_t __fake_pread_write(int fd, void *buf,
size_t count, off_t offset, int do_pwrite)
{
int save_errno;
ssize_t result;
off_t old_offset;
- /* Since we must not change the file pointer preserve the
+ /* Since we must not change the file pointer preserve the
* value so that we can restore it later. */
- if ((old_offset=__lseek(fd, 0, SEEK_CUR)) == (off_t) -1)
+ if ((old_offset=lseek(fd, 0, SEEK_CUR)) == (off_t) -1)
return -1;
/* Set to wanted position. */
- if (__lseek (fd, offset, SEEK_SET) == (off_t) -1)
+ if (lseek (fd, offset, SEEK_SET) == (off_t) -1)
return -1;
if (do_pwrite==1) {
result = read(fd, buf, count);
}
- /* Now we have to restore the position. If this fails we
+ /* Now we have to restore the position. If this fails we
* have to return this as an error. */
save_errno = errno;
- if (__lseek(fd, old_offset, SEEK_SET) == (off_t) -1)
+ if (lseek(fd, old_offset, SEEK_SET) == (off_t) -1)
{
if (result == -1)
__set_errno(save_errno);
return(result);
}
-#if defined __UCLIBC_HAS_LFS__
-static ssize_t __fake_pread_write64(int fd, void *buf,
+# ifdef __UCLIBC_HAS_LFS__
+libc_hidden_proto(lseek64)
+
+static ssize_t __fake_pread_write64(int fd, void *buf,
size_t count, off64_t offset, int do_pwrite)
{
int save_errno;
ssize_t result;
off64_t old_offset;
- /* Since we must not change the file pointer preserve the
+ /* Since we must not change the file pointer preserve the
* value so that we can restore it later. */
- if ((old_offset=__lseek64(fd, 0, SEEK_CUR)) == (off64_t) -1)
+ if ((old_offset=lseek64(fd, 0, SEEK_CUR)) == (off64_t) -1)
return -1;
/* Set to wanted position. */
- if (__lseek64(fd, offset, SEEK_SET) == (off64_t) -1)
- return -1;
+ if (lseek64(fd, offset, SEEK_SET) == (off64_t) -1)
+ return -1;
if (do_pwrite==1) {
/* Write the data. */
/* Now we have to restore the position. */
save_errno = errno;
- if (__lseek64 (fd, old_offset, SEEK_SET) == (off64_t) -1) {
+ if (lseek64 (fd, old_offset, SEEK_SET) == (off64_t) -1) {
if (result == -1)
__set_errno (save_errno);
return -1;
__set_errno (save_errno);
return result;
}
-#endif /* __UCLIBC_HAS_LFS__ */
+# endif /* __UCLIBC_HAS_LFS__ */
#endif /* ! defined __NR_pread || ! defined __NR_pwrite */
#ifndef __NR_pread
{
return(__fake_pread_write(fd, buf, count, offset, 0));
}
-weak_alias (__libc_pread, pread)
+weak_alias(__libc_pread,pread)
-#if defined __UCLIBC_HAS_LFS__
+# ifdef __UCLIBC_HAS_LFS__
ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
-{
+{
return(__fake_pread_write64(fd, buf, count, offset, 0));
}
-weak_alias (__libc_pread64, pread64)
-#endif /* __UCLIBC_HAS_LFS__ */
+weak_alias(__libc_pread64,pread64)
+# endif /* __UCLIBC_HAS_LFS__ */
#endif /* ! __NR_pread */
#ifndef __NR_pwrite
ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
{
- return(__fake_pread_write(fd, buf, count, offset, 1));
+ return(__fake_pread_write(fd, (void*)buf, count, offset, 1));
}
-weak_alias (__libc_pwrite, pwrite)
+weak_alias(__libc_pwrite,pwrite)
-#if defined __UCLIBC_HAS_LFS__
+# ifdef __UCLIBC_HAS_LFS__
ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
-{
+{
return(__fake_pread_write64(fd, (void*)buf, count, offset, 1));
}
-weak_alias (__libc_pwrite64, pwrite64)
-#endif /* __UCLIBC_HAS_LFS__ */
+weak_alias(__libc_pwrite64,pwrite64)
+# endif /* __UCLIBC_HAS_LFS__ */
#endif /* ! __NR_pwrite */
-
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