projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0ecb606c JJ |
1 | /* Copyright (C) 1995-1998,2000,2002,2003,2004,2006 |
| 2 | Free Software Foundation, Inc. | |
| 9ffbb612 UD |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9ffbb612 UD |
9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 9ffbb612 | 14 | |
| 41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| 9ffbb612 | 19 | |
| eae59a56 | 20 | #include <errno.h> |
| 9ffbb612 | 21 | #include <unistd.h> |
| 85bd6331 | 22 | #include <setxid.h> |
| 0ecb606c | 23 | #include <kernel-features.h> |
| eae59a56 UD |
24 | |
| 25 | ||
| 26 | #ifdef __NR_setresgid | |
| 27 | extern int __setresgid (uid_t rgid, uid_t egid, uid_t sgid); | |
| 28 | #endif | |
| 29 | ||
| 9ffbb612 UD |
30 | int |
| 31 | setegid (gid) | |
| 32 | gid_t gid; | |
| 33 | { | |
| 2edb61e3 UD |
34 | int result; |
| 35 | ||
| 36 | if (gid == (gid_t) ~0) | |
| 37 | { | |
| 38 | __set_errno (EINVAL); | |
| 39 | return -1; | |
| 40 | } | |
| 41 | ||
| eae59a56 | 42 | #if __ASSUME_32BITUIDS > 0 |
| 85bd6331 | 43 | result = INLINE_SETXID_SYSCALL (setresgid32, 3, -1, gid, -1); |
| eae59a56 | 44 | #else |
| eae59a56 UD |
45 | /* First try the syscall. */ |
| 46 | # ifdef __NR_setresgid | |
| 47 | result = __setresgid (-1, gid, -1); | |
| 54c92465 | 48 | # if __ASSUME_SETRESGID_SYSCALL > 0 |
| eae59a56 UD |
49 | if (0) |
| 50 | # else | |
| 51 | if (result == -1 && errno == ENOSYS) | |
| 52 | # endif | |
| 53 | /* No system call available. Use emulation. This may not work | |
| 54 | since `setregid' also sets the saved user ID when GID is not | |
| 55 | equal to the real user ID, making it impossible to switch back. */ | |
| 56 | # endif | |
| 57 | result = __setregid (-1, gid); | |
| 2edb61e3 | 58 | #endif |
| eae59a56 | 59 | |
| 2edb61e3 | 60 | return result; |
| 9ffbb612 | 61 | } |
| 6e86f21f | 62 | libc_hidden_def (setegid) |