blob: 3df1f0f68e61c48e45f362f6165d115d1997ff47 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* Test of environ variable.
Copyright (C) 2008-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2008. */
#include <config.h>
#include <unistd.h>
#include <string.h>
int
main ()
{
/* The environment variables that are set even in the weirdest situations
are HOME and PATH.
POSIX says that HOME is initialized by the system, and that PATH may be
unset. But in practice it's more frequent to see HOME unset and PATH
set. So we test the presence of PATH. */
char **remaining_variables = environ;
char *string;
for (; (string = *remaining_variables) != NULL; remaining_variables++)
{
if (strncmp (string, "PATH=", 5) == 0)
/* Found the PATH environment variable. */
return 0;
}
/* Failed to find the PATH environment variable. */
return 1;
}
|
