diff options
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/chown.c | 95 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/syscalls.list | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/syscalls.list | 1 |
3 files changed, 96 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/chown.c b/sysdeps/unix/sysv/linux/i386/chown.c new file mode 100644 index 0000000000..e985ce0dae --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/chown.c @@ -0,0 +1,95 @@ +/* Copyright (C) 1998 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <unistd.h> +#include <sys/syscall.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 __syscall_chown (const char *__file, + uid_t __owner, gid_t __group); +#ifdef __NR_lchown +/* running under Linux 2.0 or < 2.1.8x */ +static int __libc_old_chown; + + +int +__real_chown (const char *file, uid_t owner, gid_t group) +{ + int result; + + if (!__libc_old_chown) + { + int saved_errno = errno; + result = __syscall_chown (file, owner, group); + + if (result >= 0 || errno != ENOSYS) + return result; + + __set_errno (saved_errno); + __libc_old_chown = 1; + } + + return __lchown (file, owner, group); +} +#endif + + +#if !defined __NR_lchown || \ + (defined HAVE_ELF && defined PIC && defined DO_VERSIONING) +/* compiling under older kernels or for compatibiity */ +int +__chown_is_lchown (const char *file, uid_t owner, gid_t group) +{ + return __lchown (file, owner, group); +} +#endif + +#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING +strong_alias (__chown_is_lchown, _chown_is_lchown) +symbol_version (__chown_is_lchown, __chown, GLIBC_2.0); +symbol_version (_chown_is_lchown, chown, GLIBC_2.0); + +# ifdef __NR_lchown +strong_alias (__real_chown, _real_chown) +default_symbol_version (__real_chown, __chown, GLIBC_2.1); +default_symbol_version (_real_chown, chown, GLIBC_2.1); +# else +strong_alias (__chown_is_lchown, __chown_is_lchown21) +strong_alias (__chown_is_lchown, _chown_is_lchown21) +default_symbol_version (__chown_is_lchown21, __chown, GLIBC_2.1); +default_symbol_version (_chown_is_lchown21, chown, GLIBC_2.1); +# endif +#else +# ifdef __NR_lchown +strong_alias (__real_chown, __chown) +weak_alias (__real_chown, chown) +# else +strong_alias (__chown_is_lchown, __chown) +weak_alias (__chown_is_lchown, chown) +# endif +#endif diff --git a/sysdeps/unix/sysv/linux/i386/syscalls.list b/sysdeps/unix/sysv/linux/i386/syscalls.list index 392a257194..a66ccc0a12 100644 --- a/sysdeps/unix/sysv/linux/i386/syscalls.list +++ b/sysdeps/unix/sysv/linux/i386/syscalls.list @@ -1,5 +1,6 @@ # File name Caller Syscall name # args Strong name Weak names +s_chown chown chown 3 __syscall_chown s_getgroups getgroups getgroups 2 __syscall_getgroups s_llseek llseek _llseek 5 __sys_llseek s_setgroups setgroups setgroups 2 __syscall_setgroups diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index d0ab7d2170..f55c3f6fff 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list +++ b/sysdeps/unix/sysv/linux/syscalls.list @@ -40,7 +40,6 @@ rt_sigprocmask - rt_sigprocmask 4 __syscall_rt_sigprocmask rt_sigqueueinfo - rt_sigqueueinfo 3 __syscall_rt_sigqueueinfo rt_sigsuspend - rt_sigsuspend 2 __syscall_rt_sigsuspend rt_sigtimedwait - rt_sigtimedwait 4 __syscall_rt_sigtimedwait -s_chown chown chown 3 __syscall_chown s_getdents EXTRA getdents 3 __getdents s_getpriority getpriority getpriority 2 __syscall_getpriority s_getresgid getresgid getresgid 3 __syscall_getresgid |