malloca: Silence a warning from clang's memory sanitizer.
[gnulib.git] / tests / test-getlogin_r.c
blob81530f22656f7b4648b64a4dbfa1027890b25b20
1 /* Test of getting user name.
2 Copyright (C) 2010-2017 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Bruno Haible and Paul Eggert. */
19 #include <config.h>
21 #include <unistd.h>
23 #include "signature.h"
24 SIGNATURE_CHECK (getlogin_r, int, (char *, size_t));
26 #include "test-getlogin.h"
28 int
29 main (void)
31 /* Test value. */
32 /* Test with a large enough buffer. */
33 char buf[1024];
34 int err = getlogin_r (buf, sizeof buf);
35 test_getlogin_result (buf, err);
37 /* Test with a small buffer. */
39 char smallbuf[1024];
40 size_t n = strlen (buf);
41 size_t i;
43 for (i = 0; i <= n; i++)
45 err = getlogin_r (smallbuf, i);
46 if (i == 0)
47 ASSERT (err == ERANGE || err == EINVAL);
48 else
49 ASSERT (err == ERANGE);
53 /* Test with a huge buffer. */
55 static char hugebuf[70000];
57 ASSERT (getlogin_r (hugebuf, sizeof (hugebuf)) == 0);
58 ASSERT (strcmp (hugebuf, buf) == 0);
61 return 0;