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glibc/sysdeps/unix/sysv/linux/i386/chown.c
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/* Copyright (C) 1998-2012 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 <unistd.h> | |
#include <sysdep.h> | |
#include <sys/syscall.h> | |
#include <shlib-compat.h> | |
#include <bp-checks.h> | |
#include <linux/posix_types.h> | |
/* | |
In Linux 2.1.x the chown functions have been changed. A new function lchown | |
was introduced. The new chown now follows symlinks - the old chown and the | |
new lchown do not follow symlinks. | |
The new lchown function has the same number as the old chown had and the | |
new chown has a new number. When compiling with headers from Linux > 2.1.8x | |
it's impossible to run this libc with older kernels. In these cases libc | |
has therefore to route calls to chown to the old chown function. | |
*/ | |
extern int __chown_is_lchown (const char *__file, uid_t __owner, | |
gid_t __group); | |
extern int __real_chown (const char *__file, uid_t __owner, gid_t __group); | |
/* Consider moving to syscalls.list. */ | |
int | |
__real_chown (const char *file, uid_t owner, gid_t group) | |
{ | |
return INLINE_SYSCALL (chown32, 3, CHECK_STRING (file), owner, group); | |
} | |
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) | |
/* Compiling for compatibiity. */ | |
int | |
attribute_compat_text_section | |
__chown_is_lchown (const char *file, uid_t owner, gid_t group) | |
{ | |
return __lchown (file, owner, group); | |
} | |
#endif | |
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) | |
compat_symbol (libc, __chown_is_lchown, chown, GLIBC_2_0); | |
#endif | |
versioned_symbol (libc, __real_chown, chown, GLIBC_2_1); | |
strong_alias (__real_chown, __chown) | |
libc_hidden_def (__chown) |