Correct buffer end pointer in IO_wdefault_doallocate (BZ #26874)
[glibc.git] / login / getutid_r.c
blob68f40a6e242c4401dee104cf59b2535b10de35f2
1 /* Copyright (C) 1996-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>
4 and Paul Janzen <pcj@primenet.com>, 1996.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
20 #include <libc-lock.h>
21 #include <errno.h>
22 #include <stdlib.h>
23 #include <utmp.h>
25 #include "utmp-private.h"
28 /* We have to use the lock in getutent_r.c. */
29 __libc_lock_define (extern, __libc_utmp_lock attribute_hidden)
32 int
33 __getutid_r (const struct utmp *id, struct utmp *buffer, struct utmp **result)
35 int retval;
37 /* Test whether ID has any of the legal types. */
38 if (id->ut_type != RUN_LVL && id->ut_type != BOOT_TIME
39 && id->ut_type != OLD_TIME && id->ut_type != NEW_TIME
40 && id->ut_type != INIT_PROCESS && id->ut_type != LOGIN_PROCESS
41 && id->ut_type != USER_PROCESS && id->ut_type != DEAD_PROCESS)
42 /* No, using '<' and '>' for the test is not possible. */
44 __set_errno (EINVAL);
45 *result = NULL;
46 return -1;
49 __libc_lock_lock (__libc_utmp_lock);
51 retval = __libc_getutid_r (id, buffer, result);
53 __libc_lock_unlock (__libc_utmp_lock);
55 return retval;
57 libc_hidden_def (__getutid_r)
58 weak_alias (__getutid_r, getutid_r)