projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 97532098 | 1 | /* Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc. |
| 28f540f4 RM |
2 | This file is part of the GNU C Library. |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
| 17 | Cambridge, MA 02139, USA. */ | |
| 18 | ||
| 19 | #include <ansidecl.h> | |
| 20 | #include <errno.h> | |
| 21 | #include <unistd.h> | |
| 22 | #include <hurd.h> | |
| 23 | #include <sys/types.h> | |
| 24 | #include <hurd/id.h> | |
| 25 | #include <string.h> | |
| 26 | ||
| 27 | /* Set the effective user ID of the calling process to GID. */ | |
| 28 | int | |
| 29 | DEFUN(setegid, (gid), gid_t gid) | |
| 30 | { | |
| 31 | auth_t newauth; | |
| 32 | error_t err; | |
| 33 | ||
| 34 | HURD_CRITICAL_BEGIN; | |
| 35 | __mutex_lock (&_hurd_id.lock); | |
| 36 | err = _hurd_check_ids (); | |
| 37 | ||
| 38 | if (!err) | |
| 39 | { | |
| 40 | /* Make a new auth handle which has EGID as the first element in the | |
| 41 | list of effective gids. */ | |
| 42 | ||
| 97532098 RM |
43 | if (_hurd_id.gen.ngids > 0) |
| 44 | { | |
| 45 | _hurd_id.gen.gids[0] = gid; | |
| 46 | _hurd_id.valid = 0; | |
| 47 | } | |
| 28f540f4 RM |
48 | |
| 49 | err = __USEPORT (AUTH, __auth_makeauth | |
| 50 | (port, NULL, MACH_MSG_TYPE_COPY_SEND, 0, | |
| 51 | _hurd_id.gen.uids, _hurd_id.gen.nuids, | |
| 52 | _hurd_id.aux.uids, _hurd_id.aux.nuids, | |
| 97532098 RM |
53 | _hurd_id.gen.ngids ? _hurd_id.gen.gids : &gid, |
| 54 | _hurd_id.gen.ngids ?: 1, | |
| 28f540f4 RM |
55 | _hurd_id.aux.gids, _hurd_id.aux.ngids, |
| 56 | &newauth)); | |
| 57 | } | |
| 58 | __mutex_unlock (&_hurd_id.lock); | |
| 59 | HURD_CRITICAL_END; | |
| 60 | ||
| 61 | if (err) | |
| 62 | return __hurd_fail (err); | |
| 63 | ||
| 64 | /* Install the new handle and reauthenticate everything. */ | |
| 65 | err = __setauth (newauth); | |
| 66 | __mach_port_deallocate (__mach_task_self (), newauth); | |
| 67 | return err; | |
| 68 | } |