45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/* Test of environ variable.
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Copyright (C) 2008 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2008. */
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#include <config.h>
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#include <unistd.h>
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#include <string.h>
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int
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main ()
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{
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/* The environment variables that are set even in the weirdest situations
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are HOME and PATH.
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POSIX says that HOME is initialized by the system, and that PATH may be
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unset. But in practice it's more frequent to see HOME unset and PATH
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set. So we test the presence of PATH. */
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char **remaining_variables = environ;
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char *string;
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for (; (string = *remaining_variables) != NULL; remaining_variables++)
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{
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if (strncmp (string, "PATH=", 5) == 0)
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/* Found the PATH environment variable. */
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return 0;
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}
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/* Failed to find the PATH environment variable. */
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return 1;
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}
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