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90e1600f4f
It allows to check for its value instead of its existence. Checked with a build for all affected ABIS. Reviewed-by: Lukasz Majewski <lukma@denx.de>
256 lines
6.5 KiB
C
256 lines
6.5 KiB
C
/* Convert between the kernel's `struct stat' format, and libc's.
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Copyright (C) 1991-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/stat.h>
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#include <kernel_stat.h>
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#if STAT_IS_KERNEL_STAT
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/* Dummy. */
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struct kernel_stat;
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#else
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#include <string.h>
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#if XSTAT_IS_XSTAT64
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int
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__xstat_conv (int vers, struct kernel_stat *kbuf, void *ubuf)
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{
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switch (vers)
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{
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case _STAT_VER_KERNEL:
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/* Nothing to do. The struct is in the form the kernel expects.
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We should have short-circuted before we got here, but for
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completeness... */
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*(struct kernel_stat *) ubuf = *kbuf;
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break;
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case _STAT_VER_LINUX:
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{
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struct stat *buf = ubuf;
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/* Convert to current kernel version of `struct stat'. */
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buf->st_dev = kbuf->st_dev;
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#ifdef _HAVE_STAT___PAD1
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buf->__pad1 = 0;
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#endif
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buf->st_ino = kbuf->st_ino;
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buf->st_mode = kbuf->st_mode;
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buf->st_nlink = kbuf->st_nlink;
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buf->st_uid = kbuf->st_uid;
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buf->st_gid = kbuf->st_gid;
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buf->st_rdev = kbuf->st_rdev;
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#ifdef _HAVE_STAT___PAD2
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buf->__pad2 = 0;
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#endif
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buf->st_size = kbuf->st_size;
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buf->st_blksize = kbuf->st_blksize;
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buf->st_blocks = kbuf->st_blocks;
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#ifdef _HAVE_STAT_NSEC
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buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
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buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
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buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
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buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
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buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
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buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
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#else
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buf->st_atime = kbuf->st_atime;
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buf->st_mtime = kbuf->st_mtime;
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buf->st_ctime = kbuf->st_ctime;
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#endif
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#ifdef _HAVE_STAT___UNUSED1
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buf->__glibc_reserved1 = 0;
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#endif
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#ifdef _HAVE_STAT___UNUSED2
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buf->__glibc_reserved2 = 0;
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#endif
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#ifdef _HAVE_STAT___UNUSED3
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buf->__glibc_reserved3 = 0;
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#endif
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#ifdef _HAVE_STAT___UNUSED4
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buf->__glibc_reserved4 = 0;
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#endif
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#ifdef _HAVE_STAT___UNUSED5
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buf->__glibc_reserved5 = 0;
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#endif
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}
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break;
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default:
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return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
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}
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return 0;
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}
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#endif
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int
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__xstat64_conv (int vers, struct kernel_stat *kbuf, void *ubuf)
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{
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#if XSTAT_IS_XSTAT64
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return __xstat_conv (vers, kbuf, ubuf);
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#else
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switch (vers)
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{
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case _STAT_VER_LINUX:
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{
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struct stat64 *buf = ubuf;
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/* Convert to current kernel version of `struct stat64'. */
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buf->st_dev = kbuf->st_dev;
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#ifdef _HAVE_STAT64___PAD1
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buf->__pad1 = 0;
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#endif
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buf->st_ino = kbuf->st_ino;
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#ifdef _HAVE_STAT64___ST_INO
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buf->__st_ino = kbuf->st_ino;
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#endif
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buf->st_mode = kbuf->st_mode;
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buf->st_nlink = kbuf->st_nlink;
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buf->st_uid = kbuf->st_uid;
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buf->st_gid = kbuf->st_gid;
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buf->st_rdev = kbuf->st_rdev;
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#ifdef _HAVE_STAT64___PAD2
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buf->__pad2 = 0;
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#endif
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buf->st_size = kbuf->st_size;
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buf->st_blksize = kbuf->st_blksize;
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buf->st_blocks = kbuf->st_blocks;
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#ifdef _HAVE_STAT64_NSEC
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buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
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buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
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buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
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buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
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buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
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buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
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#else
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buf->st_atime = kbuf->st_atime;
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buf->st_mtime = kbuf->st_mtime;
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buf->st_ctime = kbuf->st_ctime;
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#endif
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#ifdef _HAVE_STAT64___UNUSED1
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buf->__glibc_reserved1 = 0;
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#endif
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#ifdef _HAVE_STAT64___UNUSED2
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buf->__glibc_reserved2 = 0;
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#endif
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#ifdef _HAVE_STAT64___UNUSED3
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buf->__glibc_reserved3 = 0;
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#endif
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#ifdef _HAVE_STAT64___UNUSED4
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buf->__glibc_reserved4 = 0;
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#endif
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#ifdef _HAVE_STAT64___UNUSED5
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buf->__glibc_reserved5 = 0;
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#endif
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}
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break;
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/* If struct stat64 is different from struct stat then
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_STAT_VER_KERNEL does not make sense. */
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case _STAT_VER_KERNEL:
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default:
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return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
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}
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return 0;
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#endif
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}
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int
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__xstat32_conv (int vers, struct stat64 *kbuf, struct stat *buf)
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{
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switch (vers)
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{
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case _STAT_VER_LINUX:
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{
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/* Convert current kernel version of `struct stat64' to
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`struct stat'. */
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buf->st_dev = kbuf->st_dev;
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#ifdef _HAVE_STAT___PAD1
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buf->__pad1 = 0;
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#endif
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buf->st_ino = kbuf->st_ino;
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if (sizeof (buf->st_ino) != sizeof (kbuf->st_ino)
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&& buf->st_ino != kbuf->st_ino)
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return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
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buf->st_mode = kbuf->st_mode;
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buf->st_nlink = kbuf->st_nlink;
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buf->st_uid = kbuf->st_uid;
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buf->st_gid = kbuf->st_gid;
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buf->st_rdev = kbuf->st_rdev;
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#ifdef _HAVE_STAT___PAD2
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buf->__pad2 = 0;
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#endif
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buf->st_size = kbuf->st_size;
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/* Check for overflow. */
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if (sizeof (buf->st_size) != sizeof (kbuf->st_size)
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&& buf->st_size != kbuf->st_size)
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return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
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buf->st_blksize = kbuf->st_blksize;
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buf->st_blocks = kbuf->st_blocks;
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/* Check for overflow. */
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if (sizeof (buf->st_blocks) != sizeof (kbuf->st_blocks)
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&& buf->st_blocks != kbuf->st_blocks)
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return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
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#ifdef _HAVE_STAT_NSEC
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buf->st_atim.tv_sec = kbuf->st_atim.tv_sec;
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buf->st_atim.tv_nsec = kbuf->st_atim.tv_nsec;
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buf->st_mtim.tv_sec = kbuf->st_mtim.tv_sec;
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buf->st_mtim.tv_nsec = kbuf->st_mtim.tv_nsec;
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buf->st_ctim.tv_sec = kbuf->st_ctim.tv_sec;
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buf->st_ctim.tv_nsec = kbuf->st_ctim.tv_nsec;
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#else
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buf->st_atime = kbuf->st_atime;
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buf->st_mtime = kbuf->st_mtime;
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buf->st_ctime = kbuf->st_ctime;
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#endif
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#ifdef _HAVE_STAT___UNUSED1
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buf->__glibc_reserved1 = 0;
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#endif
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#ifdef _HAVE_STAT___UNUSED2
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buf->__glibc_reserved2 = 0;
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#endif
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#ifdef _HAVE_STAT___UNUSED3
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buf->__glibc_reserved3 = 0;
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#endif
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#ifdef _HAVE_STAT___UNUSED4
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buf->__glibc_reserved4 = 0;
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#endif
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#ifdef _HAVE_STAT___UNUSED5
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buf->__glibc_reserved5 = 0;
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#endif
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}
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break;
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/* If struct stat64 is different from struct stat then
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_STAT_VER_KERNEL does not make sense. */
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case _STAT_VER_KERNEL:
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default:
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return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
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}
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return 0;
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}
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#endif
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