glibc/sysdeps/unix/sysv/linux/xstatconv.c
Roland McGrath c84d1f2ed7 2002-10-02 Roland McGrath <roland@redhat.com>
* sysdeps/unix/sysv/linux/xstatconv.c [STAT_IS_KERNEL_STAT]:
	Conditionalize the function definitions on this.
	* sysdeps/unix/sysv/linux/xstat.c (__xstat) [STAT_IS_KERNEL_STAT]:
	Don't use xstat_conv, just fail if VERS != _STAT_VER_KERNEL.
	* sysdeps/unix/sysv/linux/fxstat.c (__fxstat) [STAT_IS_KERNEL_STAT]:
	Likewise.
	* sysdeps/unix/sysv/linux/lxstat.c (__lxstat) [STAT_IS_KERNEL_STAT]:
	Likewise.
2002-10-02 08:33:46 +00:00

252 lines
5.8 KiB
C

/* Convert between the kernel's `struct stat' format, and libc's.
Copyright (C) 1991,1995,1996,1997,2000,2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifdef STAT_IS_KERNEL_STAT
/* Dummy. */
struct kernel_stat;
#else
#include <string.h>
static inline int
xstat_conv (int vers, struct kernel_stat *kbuf, void *ubuf)
{
switch (vers)
{
case _STAT_VER_KERNEL:
/* Nothing to do. The struct is in the form the kernel expects.
We should have short-circuted before we got here, but for
completeness... */
*(struct kernel_stat *) ubuf = *kbuf;
break;
case _STAT_VER_LINUX:
{
struct stat *buf = ubuf;
/* Convert to current kernel version of `struct stat'. */
buf->st_dev = kbuf->st_dev;
#ifdef _HAVE_STAT___PAD1
buf->__pad1 = 0;
#endif
buf->st_ino = kbuf->st_ino;
buf->st_mode = kbuf->st_mode;
buf->st_nlink = kbuf->st_nlink;
buf->st_uid = kbuf->st_uid;
buf->st_gid = kbuf->st_gid;
buf->st_rdev = kbuf->st_rdev;
#ifdef _HAVE_STAT___PAD2
buf->__pad2 = 0;
#endif
buf->st_size = kbuf->st_size;
buf->st_blksize = kbuf->st_blksize;
buf->st_blocks = kbuf->st_blocks;
buf->st_atime = kbuf->st_atime;
#ifdef _HAVE_STAT___UNUSED1
buf->__unused1 = 0;
#endif
buf->st_mtime = kbuf->st_mtime;
#ifdef _HAVE_STAT___UNUSED2
buf->__unused2 = 0;
#endif
buf->st_ctime = kbuf->st_ctime;
#ifdef _HAVE_STAT___UNUSED3
buf->__unused3 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED4
buf->__unused4 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED5
buf->__unused5 = 0;
#endif
}
break;
default:
__set_errno (EINVAL);
return -1;
}
return 0;
}
static inline int
xstat64_conv (int vers, struct kernel_stat *kbuf, void *ubuf)
{
#ifdef XSTAT_IS_XSTAT64
return xstat_conv (vers, kbuf, ubuf);
#else
switch (vers)
{
case _STAT_VER_LINUX:
{
struct stat64 *buf = ubuf;
/* Convert to current kernel version of `struct stat64'. */
buf->st_dev = kbuf->st_dev;
#ifdef _HAVE_STAT64___PAD1
buf->__pad1 = 0;
#endif
buf->st_ino = kbuf->st_ino;
#ifdef _HAVE_STAT64___ST_INO
buf->__st_ino = kbuf->st_ino;
#endif
buf->st_mode = kbuf->st_mode;
buf->st_nlink = kbuf->st_nlink;
buf->st_uid = kbuf->st_uid;
buf->st_gid = kbuf->st_gid;
buf->st_rdev = kbuf->st_rdev;
#ifdef _HAVE_STAT64___PAD2
buf->__pad2 = 0;
#endif
buf->st_size = kbuf->st_size;
buf->st_blksize = kbuf->st_blksize;
buf->st_blocks = kbuf->st_blocks;
buf->st_atime = kbuf->st_atime;
#ifdef _HAVE_STAT64___UNUSED1
buf->__unused1 = 0;
#endif
buf->st_mtime = kbuf->st_mtime;
#ifdef _HAVE_STAT64___UNUSED2
buf->__unused2 = 0;
#endif
buf->st_ctime = kbuf->st_ctime;
#ifdef _HAVE_STAT64___UNUSED3
buf->__unused3 = 0;
#endif
#ifdef _HAVE_STAT64___UNUSED4
buf->__unused4 = 0;
#endif
#ifdef _HAVE_STAT64___UNUSED5
buf->__unused5 = 0;
#endif
}
break;
/* If struct stat64 is different from struct stat then
_STAT_VER_KERNEL does not make sense. */
case _STAT_VER_KERNEL:
default:
__set_errno (EINVAL);
return -1;
}
return 0;
#endif
}
static inline int
xstat32_conv (int vers, struct stat64 *kbuf, struct stat *buf)
{
switch (vers)
{
case _STAT_VER_LINUX:
{
/* Convert current kernel version of `struct stat64' to
`struct stat'. */
buf->st_dev = kbuf->st_dev;
#ifdef _HAVE_STAT___PAD1
buf->__pad1 = 0;
#endif
#ifdef _HAVE_STAT64___ST_INO
# if __ASSUME_ST_INO_64_BIT == 0
if (kbuf->st_ino == 0)
buf->st_ino = kbuf->__st_ino;
else
# endif
{
buf->st_ino = kbuf->st_ino;
if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)
&& buf->st_ino != kbuf->st_ino)
{
__set_errno (EOVERFLOW);
return -1;
}
}
#else
buf->st_ino = kbuf->st_ino;
if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)
&& buf->st_ino != kbuf->st_ino)
{
__set_errno (EOVERFLOW);
return -1;
}
#endif
buf->st_mode = kbuf->st_mode;
buf->st_nlink = kbuf->st_nlink;
buf->st_uid = kbuf->st_uid;
buf->st_gid = kbuf->st_gid;
buf->st_rdev = kbuf->st_rdev;
#ifdef _HAVE_STAT___PAD2
buf->__pad2 = 0;
#endif
buf->st_size = kbuf->st_size;
/* Check for overflow. */
if (sizeof (buf->st_size) != sizeof (kbuf->st_size)
&& buf->st_size != kbuf->st_size)
{
__set_errno (EOVERFLOW);
return -1;
}
buf->st_blksize = kbuf->st_blksize;
buf->st_blocks = kbuf->st_blocks;
/* Check for overflow. */
if (sizeof (buf->st_blocks) != sizeof (kbuf->st_blocks)
&& buf->st_blocks != kbuf->st_blocks)
{
__set_errno (EOVERFLOW);
return -1;
}
buf->st_atime = kbuf->st_atime;
#ifdef _HAVE_STAT___UNUSED1
buf->__unused1 = 0;
#endif
buf->st_mtime = kbuf->st_mtime;
#ifdef _HAVE_STAT___UNUSED2
buf->__unused2 = 0;
#endif
buf->st_ctime = kbuf->st_ctime;
#ifdef _HAVE_STAT___UNUSED3
buf->__unused3 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED4
buf->__unused4 = 0;
#endif
#ifdef _HAVE_STAT___UNUSED5
buf->__unused5 = 0;
#endif
}
break;
/* If struct stat64 is different from struct stat then
_STAT_VER_KERNEL does not make sense. */
case _STAT_VER_KERNEL:
default:
__set_errno (EINVAL);
return -1;
}
return 0;
}
#endif