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glibc/sysdeps/unix/sysv/linux/xstatconv.c
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/* Convert between the kernel's `struct stat' format, and libc's. | |
Copyright (C) 1991-2016 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 | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <sys/stat.h> | |
#include <kernel_stat.h> | |
#include <kernel-features.h> | |
#ifdef STAT_IS_KERNEL_STAT | |
/* Dummy. */ | |
struct kernel_stat; | |
#else | |
#include <string.h> | |
#ifdef XSTAT_IS_XSTAT64 | |
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; | |
#ifdef _HAVE_STAT_NSEC | |
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; | |
#else | |
buf->st_atime = kbuf->st_atime; | |
buf->st_mtime = kbuf->st_mtime; | |
buf->st_ctime = kbuf->st_ctime; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED1 | |
buf->__glibc_reserved1 = 0; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED2 | |
buf->__glibc_reserved2 = 0; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED3 | |
buf->__glibc_reserved3 = 0; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED4 | |
buf->__glibc_reserved4 = 0; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED5 | |
buf->__glibc_reserved5 = 0; | |
#endif | |
} | |
break; | |
default: | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL); | |
} | |
return 0; | |
} | |
#endif | |
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; | |
#ifdef _HAVE_STAT64_NSEC | |
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; | |
#else | |
buf->st_atime = kbuf->st_atime; | |
buf->st_mtime = kbuf->st_mtime; | |
buf->st_ctime = kbuf->st_ctime; | |
#endif | |
#ifdef _HAVE_STAT64___UNUSED1 | |
buf->__glibc_reserved1 = 0; | |
#endif | |
#ifdef _HAVE_STAT64___UNUSED2 | |
buf->__glibc_reserved2 = 0; | |
#endif | |
#ifdef _HAVE_STAT64___UNUSED3 | |
buf->__glibc_reserved3 = 0; | |
#endif | |
#ifdef _HAVE_STAT64___UNUSED4 | |
buf->__glibc_reserved4 = 0; | |
#endif | |
#ifdef _HAVE_STAT64___UNUSED5 | |
buf->__glibc_reserved5 = 0; | |
#endif | |
} | |
break; | |
/* If struct stat64 is different from struct stat then | |
_STAT_VER_KERNEL does not make sense. */ | |
case _STAT_VER_KERNEL: | |
default: | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL); | |
} | |
return 0; | |
#endif | |
} | |
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 | |
# ifndef __ASSUME_ST_INO_64_BIT | |
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) | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW); | |
} | |
#else | |
buf->st_ino = kbuf->st_ino; | |
if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino) | |
&& buf->st_ino != kbuf->st_ino) | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW); | |
#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) | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW); | |
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) | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW); | |
#ifdef _HAVE_STAT_NSEC | |
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; | |
#else | |
buf->st_atime = kbuf->st_atime; | |
buf->st_mtime = kbuf->st_mtime; | |
buf->st_ctime = kbuf->st_ctime; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED1 | |
buf->__glibc_reserved1 = 0; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED2 | |
buf->__glibc_reserved2 = 0; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED3 | |
buf->__glibc_reserved3 = 0; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED4 | |
buf->__glibc_reserved4 = 0; | |
#endif | |
#ifdef _HAVE_STAT___UNUSED5 | |
buf->__glibc_reserved5 = 0; | |
#endif | |
} | |
break; | |
/* If struct stat64 is different from struct stat then | |
_STAT_VER_KERNEL does not make sense. */ | |
case _STAT_VER_KERNEL: | |
default: | |
return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL); | |
} | |
return 0; | |
} | |
#endif |