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authorRoland McGrath <roland@gnu.org>1998-11-29 10:10:47 +0000
committerRoland McGrath <roland@gnu.org>1998-11-29 10:10:47 +0000
commit2d6d0728231ad89064267fb0df3090675a4f174b (patch)
treea9fce31bc7fdb5eb10c5dc75be6f08cc813bc330 /hurd/geteuids.c
parent5f75d1e2fdf4b188bb742a7d6626731bf5b392f6 (diff)
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1998-11-28 Roland McGrath <roland@baalperazim.frob.com>
* hurd/setuids.c: Renamed to ... * hurd/seteuids.c: this. (setuids): Renamed to seteuids. * hurd/getuids.c: Renamed to ... * hurd/geteuids.c: this. (__getuids): Renamed to geteuids, no aliases. * hurd/hurd.h (geteuids, seteuids): Declare them. * hurd/Versions: Replace getuids; __getuids with geteuids; seteuids. * hurd/Makefile (routines): Updated.
Diffstat (limited to 'hurd/geteuids.c')
-rw-r--r--hurd/geteuids.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/hurd/geteuids.c b/hurd/geteuids.c
new file mode 100644
index 0000000..ed85dfd
--- /dev/null
+++ b/hurd/geteuids.c
@@ -0,0 +1,63 @@
+/* Copyright (C) 1993, 94, 96, 97, 98 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <hurd.h>
+#include <hurd/id.h>
+#include <string.h>
+
+int
+geteuids (int n, uid_t *uidset)
+{
+ error_t err;
+ int nuids;
+ void *crit;
+
+ 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);
+ 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;
+}