mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 05:50:14 +00:00
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/* Copyright (C) 1998,2000,2002,2003,2004,2006 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 <setxid.h>
|
|
#include <kernel-features.h>
|
|
|
|
|
|
#if defined __NR_setresgid || __ASSUME_SETRESGID_SYSCALL > 0
|
|
|
|
extern int __setresgid (gid_t rgid, gid_t egid, gid_t sgid);
|
|
|
|
int
|
|
setegid (gid_t gid)
|
|
{
|
|
int result;
|
|
|
|
if (gid == (gid_t) ~0)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
# if __ASSUME_32BITUIDS > 0 && defined __NR_setresgid32
|
|
result = INLINE_SETXID_SYSCALL (setresgid32, 3, -1, gid, -1);
|
|
# else
|
|
/* First try the syscall. */
|
|
result = INLINE_SETXID_SYSCALL (setresgid, 3, -1, gid, -1);
|
|
# if __ASSUME_SETRESGID_SYSCALL == 0
|
|
if (result == -1 && errno == ENOSYS)
|
|
/* No system call available. Use emulation. This may not work
|
|
since `setregid' also sets the saved group ID when GID is not
|
|
equal to the real group ID, making it impossible to switch back. */
|
|
result = __setregid (-1, gid);
|
|
# endif
|
|
# endif
|
|
|
|
return result;
|
|
}
|
|
#ifndef setegid
|
|
libc_hidden_def (setegid)
|
|
#endif
|
|
#else
|
|
# include <sysdeps/unix/bsd/setegid.c>
|
|
#endif
|