1/* Copyright (C) 1996-2019 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.
5
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.
10
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.
15
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 <http://www.gnu.org/licenses/>. */
19
20#include <libc-lock.h>
21#include <errno.h>
22#include <stdlib.h>
23#include <utmp.h>
24
25#include "utmp-private.h"
26
27
28/* We have to use the lock in getutent_r.c. */
29__libc_lock_define (extern, __libc_utmp_lock attribute_hidden)
30
31
32int
33__getutid_r (const struct utmp *id, struct utmp *buffer, struct utmp **result)
34{
35#if (_HAVE_UT_ID - 0) && (_HAVE_UT_TYPE - 0)
36 int retval;
37
38 /* Test whether ID has any of the legal types. */
39 if (id->ut_type != RUN_LVL && id->ut_type != BOOT_TIME
40 && id->ut_type != OLD_TIME && id->ut_type != NEW_TIME
41 && id->ut_type != INIT_PROCESS && id->ut_type != LOGIN_PROCESS
42 && id->ut_type != USER_PROCESS && id->ut_type != DEAD_PROCESS)
43 /* No, using '<' and '>' for the test is not possible. */
44 {
45 __set_errno (EINVAL);
46 *result = NULL;
47 return -1;
48 }
49
50 __libc_lock_lock (__libc_utmp_lock);
51
52 retval = (*__libc_utmp_jump_table->getutid_r) (id, buffer, result);
53
54 __libc_lock_unlock (__libc_utmp_lock);
55
56 return retval;
57#else /* !_HAVE_UT_ID && !_HAVE_UT_TYPE */
58 __set_errno (ENOSYS);
59 return -1;
60#endif
61}
62libc_hidden_def (__getutid_r)
63weak_alias (__getutid_r, getutid_r)
64