62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/* Tests of unsetenv.
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Copyright (C) 2009-2025 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 <https://www.gnu.org/licenses/>. */
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/* Written by Eric Blake <ebb9@byu.net>, 2009. */
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#include <config.h>
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#include <stdlib.h>
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#include "signature.h"
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SIGNATURE_CHECK (unsetenv, int, (char const *));
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include "macros.h"
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int
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main (void)
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{
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/* Static to pacify gcc -Wanalyzer-putenv-of-auto-var. */
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static char entry[] = "b=2";
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/* Test removal when multiple entries present. */
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ASSERT (putenv ((char *) "a=1") == 0);
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ASSERT (putenv (entry) == 0);
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entry[0] = 'a'; /* Unspecified what getenv("a") would be at this point. */
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ASSERT (unsetenv ("a") == 0); /* Both entries will be removed. */
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ASSERT (getenv ("a") == NULL);
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ASSERT (unsetenv ("a") == 0);
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/* Required to fail with EINVAL. */
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errno = 0;
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ASSERT (unsetenv ("") == -1);
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ASSERT (errno == EINVAL);
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errno = 0;
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ASSERT (unsetenv ("a=b") == -1);
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ASSERT (errno == EINVAL);
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#if 0
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/* glibc and gnulib's implementation guarantee this, but POSIX no
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longer requires it: https://austingroupbugs.net/view.php?id=185 */
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errno = 0;
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ASSERT (unsetenv (NULL) == -1);
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ASSERT (errno == EINVAL);
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#endif
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return test_exit_status;
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}
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