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99135114 DD |
1 | /* Test for endpwent->getpwent crash for BZ #24695 |
2 | Copyright (C) 2019 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
99135114 DD |
18 | |
19 | #include <stdlib.h> | |
20 | #include <string.h> | |
21 | #include <sys/types.h> | |
22 | #include <pwd.h> | |
23 | ||
24 | #include <support/support.h> | |
25 | #include <support/check.h> | |
26 | ||
27 | /* It is entirely allowed to start with a getpwent call without | |
28 | resetting the state of the service via a call to setpwent. | |
29 | You can also call getpwent more times than you have entries in | |
30 | the service, and it should not fail. This test iteratates the | |
31 | database once, gets to the end, and then attempts a second | |
32 | iteration to look for crashes. */ | |
33 | ||
34 | static void | |
35 | try_it (void) | |
36 | { | |
37 | struct passwd *pw; | |
38 | ||
39 | /* setpwent is intentionally omitted here. The first call to | |
40 | getpwent detects that it's first and initializes. The second | |
41 | time try_it is called, this "first call" was not detected before | |
42 | the fix, and getpwent would crash. */ | |
43 | ||
44 | while ((pw = getpwent ()) != NULL) | |
45 | ; | |
46 | ||
47 | /* We only care if this segfaults or not. */ | |
48 | endpwent (); | |
49 | } | |
50 | ||
51 | static int | |
52 | do_test (void) | |
53 | { | |
54 | char *cmd; | |
55 | ||
56 | cmd = xasprintf ("%s/makedb -o /var/db/passwd.db /var/db/passwd.in", | |
57 | support_bindir_prefix); | |
58 | system (cmd); | |
59 | free (cmd); | |
60 | ||
61 | try_it (); | |
62 | try_it (); | |
63 | ||
64 | return 0; | |
65 | } | |
66 | #include <support/test-driver.c> |