1/* Tests of setenv.
2   Copyright (C) 2009, 2010 Free Software Foundation, Inc.
3
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.
8
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.
13
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/>.  */
16
17/* Written by Eric Blake <ebb9@byu.net>, 2009.  */
18
19#include <config.h>
20
21#include <stdlib.h>
22
23#include "signature.h"
24SIGNATURE_CHECK (setenv, int, (char const *, char const *, int));
25
26#include <errno.h>
27#include <string.h>
28#include <unistd.h>
29
30#include "macros.h"
31
32int
33main (void)
34{
35  /* Test overwriting.  */
36  ASSERT (setenv ("a", "==", -1) == 0);
37  ASSERT (setenv ("a", "2", 0) == 0);
38  ASSERT (strcmp (getenv ("a"), "==") == 0);
39
40  /* Required to fail with EINVAL.  */
41  errno = 0;
42  ASSERT (setenv ("", "", 1) == -1);
43  ASSERT (errno == EINVAL);
44  errno = 0;
45  ASSERT (setenv ("a=b", "", 0) == -1);
46  ASSERT (errno == EINVAL);
47#if 0
48  /* glibc and gnulib's implementation guarantee this, but POSIX no
49     longer requires it: http://austingroupbugs.net/view.php?id=185  */
50  errno = 0;
51  ASSERT (setenv (NULL, "", 0) == -1);
52  ASSERT (errno == EINVAL);
53#endif
54
55  return 0;
56}
57