* Copyright (C) 1994, 1995, 1996, 1997 Theodore Ts'o.
*
* %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
+#ifndef _LARGEFILE_SOURCE
#define _LARGEFILE_SOURCE
+#endif
+#ifndef _LARGEFILE64_SOURCE
#define _LARGEFILE64_SOURCE
+#endif
+#include "config.h"
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#else
#if defined(HAVE_LLSEEK)
-#include <syscall.h>
+#include <sys/syscall.h>
#ifndef HAVE_LLSEEK_PROTOTYPE
extern long long llseek (int fd, long long offset, int origin);
#else /* ! HAVE_LLSEEK */
-#if SIZEOF_LONG == SIZEOF_LONG_LONG
+#if SIZEOF_LONG == SIZEOF_LONG_LONG || _FILE_OFFSET_BITS+0 == 64
-#define llseek lseek
+#define my_llseek lseek
#else /* SIZEOF_LONG != SIZEOF_LONG_LONG */
static _syscall5(int,_llseek,unsigned int,fd,unsigned long,offset_high,
unsigned long, offset_low,ext2_loff_t *,result,
- unsigned int, origin)
+ unsigned int, origin);
#endif
static ext2_loff_t my_llseek (int fd, ext2_loff_t offset, int origin)
#ifndef __i386__
retval = _llseek(fd, ((unsigned long long) offset) >> 32,
-#else
+#else
retval = syscall(__NR__llseek, fd, (unsigned long long) (offset >> 32),
#endif
((unsigned long long) offset) & 0xffffffff,
return (retval == -1 ? (ext2_loff_t) retval : result);
}
-#endif /* __alpha__ || __ia64__ */
+#endif /* SIZE_LONG == SIZEOF_LONG_LONG */
#endif /* HAVE_LLSEEK */
#endif /* defined(HAVE_LSEEK64) && defined(HAVE_LSEEK64_PROTOTYPE) */
ext2_loff_t ext2fs_llseek (int fd, ext2_loff_t offset, int origin)
{
+#if SIZEOF_OFF_T >= SIZEOF_LONG_LONG
+ return my_llseek (fd, offset, origin);
+#else
ext2_loff_t result;
static int do_compat = 0;
- if ((sizeof(off_t) >= sizeof(ext2_loff_t)) ||
- (offset < ((ext2_loff_t) 1 << ((sizeof(off_t)*8) -1))))
- return lseek(fd, (off_t) offset, origin);
+ if (do_compat)
+ goto fallback;
- if (do_compat) {
- errno = EINVAL;
- return -1;
- }
-
result = my_llseek (fd, offset, origin);
if (result == -1 && errno == ENOSYS) {
/*
* which does not support the llseek system call
*/
do_compat++;
+ fallback:
+ if (offset < ((ext2_loff_t) 1 << ((sizeof(off_t)*8) -1)))
+ return lseek(fd, (off_t) offset, origin);
errno = EINVAL;
+ return -1;
}
return result;
+#endif
}
#else /* !linux */