diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/hurd/setuid.c')
| -rw-r--r-- | REORG.TODO/sysdeps/mach/hurd/setuid.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/hurd/setuid.c b/REORG.TODO/sysdeps/mach/hurd/setuid.c new file mode 100644 index 0000000000..e78c5dd48f --- /dev/null +++ b/REORG.TODO/sysdeps/mach/hurd/setuid.c @@ -0,0 +1,99 @@ +/* Copyright (C) 1991-2017 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 <sys/types.h> +#include <hurd.h> +#include <hurd/id.h> +#include <string.h> + +/* Set the user ID of the calling process to UID. + If the calling process is the super-user, the real + and effective user IDs, and the saved set-user-ID to UID; + if not, the effective user ID is set to UID. */ +int +__setuid (uid_t uid) +{ + 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 UID as the real uid, + and as the first element in the list of effective uids. */ + + uid_t *newgen, *newaux, auxbuf[2]; + size_t ngen, naux; + + newaux = _hurd_id.aux.uids; + naux = _hurd_id.aux.nuids; + if (_hurd_id.gen.nuids == 0) + { + /* No effective uids now. The new set will be just UID. */ + newgen = &uid; + ngen = 1; + } + else if (_hurd_id.gen.uids[0] == 0) + { + /* We are root; set the effective, real, and saved to UID. */ + _hurd_id.gen.uids[0] = uid; + _hurd_id.valid = 0; + newgen = _hurd_id.gen.uids; + ngen = _hurd_id.gen.nuids; + if (_hurd_id.aux.nuids < 2) + { + newaux = auxbuf; + naux = 2; + } + newaux[0] = newaux[1] = uid; + } + else + { + /* We are not root; just change the effective UID. */ + /* XXX that implies an unprivileged setuid(0) will give + the caller root, no questions asked! */ + _hurd_id.gen.uids[0] = uid; + _hurd_id.valid = 0; + newgen = _hurd_id.gen.uids; + ngen = _hurd_id.gen.nuids; + } + + 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; +} + +weak_alias (__setuid, setuid) |