mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-01 17:30:07 +00:00
c3b287be74
During critical sections, signal handling is deferred and thus RPCs return EINTR, even if SA_RESTART is set. We thus have to restart the whole critical section in that case. This also adds HURD_CRITICAL_UNLOCK in the cases where one wants to break the section in the middle.
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* Copyright (C) 1993-2021 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <grp.h>
|
|
#include <hurd.h>
|
|
#include <hurd/id.h>
|
|
|
|
/* Set the group set for the current user to GROUPS (N of them). */
|
|
int
|
|
setgroups (size_t n, const gid_t *groups)
|
|
{
|
|
error_t err;
|
|
auth_t newauth;
|
|
size_t i;
|
|
gid_t new[n];
|
|
|
|
/* Fault before taking locks. */
|
|
for (i = 0; i < n; ++i)
|
|
new[i] = groups[i];
|
|
|
|
retry:
|
|
HURD_CRITICAL_BEGIN;
|
|
__mutex_lock (&_hurd_id.lock);
|
|
err = _hurd_check_ids ();
|
|
if (! err)
|
|
{
|
|
/* Get a new auth port using those IDs. */
|
|
err = __USEPORT (AUTH,
|
|
__auth_makeauth (port, NULL, MACH_MSG_TYPE_COPY_SEND, 0,
|
|
_hurd_id.gen.uids, _hurd_id.gen.nuids,
|
|
_hurd_id.aux.uids, _hurd_id.aux.nuids,
|
|
new, n,
|
|
_hurd_id.aux.gids, _hurd_id.aux.ngids,
|
|
&newauth));
|
|
}
|
|
__mutex_unlock (&_hurd_id.lock);
|
|
HURD_CRITICAL_END;
|
|
if (err == EINTR)
|
|
/* Got a signal while inside an RPC of the critical section, retry again */
|
|
goto retry;
|
|
|
|
if (err)
|
|
return __hurd_fail (err);
|
|
|
|
/* Install the new auth port and reauthenticate everything. */
|
|
err = __setauth (newauth);
|
|
__mach_port_deallocate (__mach_task_self (), newauth);
|
|
return err;
|
|
}
|
|
libc_hidden_def (setgroups)
|