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/* Convert between the kernel's `struct stat' format, and libc's.
Copyright (C) 1991-2024 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, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sys/stat.h>
#include <kernel_stat.h>
#include <string.h>
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;
memset (&buf->st_pad1, 0, sizeof (buf->st_pad1));
buf->st_ino = kbuf->st_ino;
/* Check for overflow. */
if (buf->st_ino != kbuf->st_ino)
{
__set_errno (EOVERFLOW);
return -1;
}
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;
memset (&buf->st_pad2, 0, sizeof (buf->st_pad2));
buf->st_size = kbuf->st_size;
/* Check for overflow. */
if (buf->st_size != kbuf->st_size)
{
__set_errno (EOVERFLOW);
return -1;
}
buf->st_pad3 = 0;
buf->st_atim.tv_sec = kbuf->st_atime_sec;
buf->st_atim.tv_nsec = kbuf->st_atime_nsec;
buf->st_mtim.tv_sec = kbuf->st_mtime_sec;
buf->st_mtim.tv_nsec = kbuf->st_mtime_nsec;
buf->st_ctim.tv_sec = kbuf->st_ctime_sec;
buf->st_ctim.tv_nsec = kbuf->st_ctime_nsec;
buf->st_blksize = kbuf->st_blksize;
buf->st_blocks = kbuf->st_blocks;
/* Check for overflow. */
if (buf->st_blocks != kbuf->st_blocks)
{
__set_errno (EOVERFLOW);
return -1;
}
memset (&buf->st_pad5, 0, sizeof (buf->st_pad5));
}
break;
default:
__set_errno (EINVAL);
return -1;
}
return 0;
}
int
__xstat64_conv (int vers, struct kernel_stat *kbuf, void *ubuf)
{
#if XSTAT_IS_XSTAT64
return xstat_conv (vers, kbuf, ubuf);
#else
switch (vers)
{
case _STAT_VER_LINUX:
{
struct stat64 *buf = ubuf;
buf->st_dev = kbuf->st_dev;
memset (&buf->st_pad1, 0, sizeof (buf->st_pad1));
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;
memset (&buf->st_pad2, 0, sizeof (buf->st_pad2));
buf->st_pad3 = 0;
buf->st_size = kbuf->st_size;
buf->st_blksize = kbuf->st_blksize;
buf->st_blocks = kbuf->st_blocks;
buf->st_atim.tv_sec = kbuf->st_atime_sec;
buf->st_atim.tv_nsec = kbuf->st_atime_nsec;
buf->st_mtim.tv_sec = kbuf->st_mtime_sec;
buf->st_mtim.tv_nsec = kbuf->st_mtime_nsec;
buf->st_ctim.tv_sec = kbuf->st_ctime_sec;
buf->st_ctim.tv_nsec = kbuf->st_ctime_nsec;
memset (&buf->st_pad4, 0, sizeof (buf->st_pad4));
}
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
}
#if _MIPS_SIM == _ABIO32
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'. The layout of the fields in the kernel's
stat64 is the same as that in the user stat64; the only
difference is that the latter has more trailing padding. */
buf->st_dev = kbuf->st_dev;
memset (&buf->st_pad1, 0, sizeof (buf->st_pad1));
buf->st_ino = kbuf->st_ino;
/* Check for overflow. */
if (buf->st_ino != kbuf->st_ino)
{
__set_errno (EOVERFLOW);
return -1;
}
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;
memset (&buf->st_pad2, 0, sizeof (buf->st_pad2));
buf->st_size = kbuf->st_size;
/* Check for overflow. */
if (buf->st_size != kbuf->st_size)
{
__set_errno (EOVERFLOW);
return -1;
}
buf->st_pad3 = 0;
buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
buf->st_blksize = kbuf->st_blksize;
buf->st_blocks = kbuf->st_blocks;
/* Check for overflow. */
if (buf->st_blocks != kbuf->st_blocks)
{
__set_errno (EOVERFLOW);
return -1;
}
memset (&buf->st_pad5, 0, sizeof (buf->st_pad5));
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 /* _MIPS_SIM == _ABIO32 */
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