diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/hurd/setresuid.c')
| -rw-r--r-- | REORG.TODO/sysdeps/mach/hurd/setresuid.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/hurd/setresuid.c b/REORG.TODO/sysdeps/mach/hurd/setresuid.c new file mode 100644 index 0000000000..39f64d44e0 --- /dev/null +++ b/REORG.TODO/sysdeps/mach/hurd/setresuid.c @@ -0,0 +1,124 @@ +/* setresuid -- set real user ID, effective user ID, and saved-set user ID + Copyright (C) 2002-2017 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 <hurd.h> +#include <hurd/id.h> + +/* Set the real user ID, effective user ID, and saved-set user ID, + of the calling process to RUID, EUID, and SUID, respectively. */ +int +__setresuid (uid_t ruid, uid_t euid, uid_t suid) +{ + auth_t newauth; + error_t err; + + HURD_CRITICAL_BEGIN; + __mutex_lock (&_hurd_id.lock); + err = _hurd_check_ids (); + + if (!err) + { + /* Make a new auth handle which has EUID as the first element in the + list of effective uids. */ + + uid_t *newgen, *newaux; + uid_t auxs[2] = { ruid, suid }; + size_t ngen, naux; + + newgen = _hurd_id.gen.uids; + ngen = _hurd_id.gen.nuids; + if (euid != -1) + { + if (_hurd_id.gen.nuids == 0) + { + /* No effective uids now. The new set will be just UID. */ + newgen = &euid; + ngen = 1; + } + else + { + _hurd_id.gen.uids[0] = euid; + _hurd_id.valid = 0; + } + } + + newaux = _hurd_id.aux.uids; + naux = _hurd_id.aux.nuids; + if (ruid != -1) + { + if (_hurd_id.aux.nuids == 0) + { + newaux = &ruid; + naux = 1; + } + else + { + _hurd_id.aux.uids[0] = ruid; + _hurd_id.valid = 0; + } + } + + if (suid != -1) + { + if (ruid == -1) + { + if (_hurd_id.aux.nuids >= 1) + auxs[0] = _hurd_id.aux.uids[0]; + else if (_hurd_id.gen.nuids >= 1) + auxs[0] = _hurd_id.gen.uids[0]; + else + /* Not even an effective UID. + Fall back to the only UID we have. */ + auxs[0] = suid; + } + if (_hurd_id.aux.nuids <= 1) + { + /* No saved uids now. The new set will be just UID. */ + newaux = auxs; + naux = 2; + } + else + { + _hurd_id.aux.uids[1] = suid; + _hurd_id.valid = 0; + } + } + + err = __USEPORT (AUTH, __auth_makeauth + (port, NULL, MACH_MSG_TYPE_COPY_SEND, 0, + newgen, ngen, newaux, naux, + _hurd_id.gen.gids, _hurd_id.gen.ngids, + _hurd_id.aux.gids, _hurd_id.aux.ngids, + &newauth)); + } + + __mutex_unlock (&_hurd_id.lock); + HURD_CRITICAL_END; + + if (err) + return __hurd_fail (err); + + /* Install the new handle and reauthenticate everything. */ + err = __setauth (newauth); + __mach_port_deallocate (__mach_task_self (), newauth); + return err; +} +libc_hidden_def (__setresuid) +weak_alias (__setresuid, setresuid) |