mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 20:40:05 +00:00
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/* Copyright (C) 1993-2024 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 <hurd.h>
|
|
#include <hurd/id.h>
|
|
#include <string.h>
|
|
|
|
int
|
|
geteuids (int n, uid_t *uidset)
|
|
{
|
|
error_t err;
|
|
int nuids;
|
|
void *crit;
|
|
|
|
retry:
|
|
crit = _hurd_critical_section_lock ();
|
|
__mutex_lock (&_hurd_id.lock);
|
|
|
|
if (err = _hurd_check_ids ())
|
|
{
|
|
__mutex_unlock (&_hurd_id.lock);
|
|
_hurd_critical_section_unlock (crit);
|
|
if (err == EINTR)
|
|
/* Got a signal while inside an RPC of the critical section, retry again */
|
|
goto retry;
|
|
return __hurd_fail (err);
|
|
}
|
|
|
|
nuids = _hurd_id.gen.nuids;
|
|
|
|
if (n != 0)
|
|
{
|
|
/* Copy the uids onto stack storage and then release the idlock. */
|
|
uid_t uids[nuids];
|
|
memcpy (uids, _hurd_id.gen.uids, sizeof (uids));
|
|
__mutex_unlock (&_hurd_id.lock);
|
|
_hurd_critical_section_unlock (crit);
|
|
|
|
/* Now that the lock is released, we can safely copy the
|
|
uid set into the user's array, which might fault. */
|
|
if (nuids > n)
|
|
nuids = n;
|
|
memcpy (uidset, uids, nuids * sizeof (uid_t));
|
|
}
|
|
else
|
|
{
|
|
__mutex_unlock (&_hurd_id.lock);
|
|
_hurd_critical_section_unlock (crit);
|
|
}
|
|
|
|
return nuids;
|
|
}
|
|
|
|
/* XXX Remove this alias when we bump the libc soname. */
|
|
|
|
#ifdef SHARED
|
|
weak_alias (geteuids, __getuids)
|
|
#endif
|