| /* Tests of unsetenv. |
| Copyright (C) 2009-2020 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 Eric Blake <ebb9@byu.net>, 2009. */ |
| |
| #include <config.h> |
| |
| #include <stdlib.h> |
| |
| #include "signature.h" |
| SIGNATURE_CHECK (unsetenv, int, (char const *)); |
| |
| #include <errno.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "macros.h" |
| |
| int |
| main (void) |
| { |
| char entry[] = "b=2"; |
| |
| /* Test removal when multiple entries present. */ |
| ASSERT (putenv ((char *) "a=1") == 0); |
| ASSERT (putenv (entry) == 0); |
| entry[0] = 'a'; /* Unspecified what getenv("a") would be at this point. */ |
| ASSERT (unsetenv ("a") == 0); /* Both entries will be removed. */ |
| ASSERT (getenv ("a") == NULL); |
| ASSERT (unsetenv ("a") == 0); |
| |
| /* Required to fail with EINVAL. */ |
| errno = 0; |
| ASSERT (unsetenv ("") == -1); |
| ASSERT (errno == EINVAL); |
| errno = 0; |
| ASSERT (unsetenv ("a=b") == -1); |
| ASSERT (errno == EINVAL); |
| #if 0 |
| /* glibc and gnulib's implementation guarantee this, but POSIX no |
| longer requires it: http://austingroupbugs.net/view.php?id=185 */ |
| errno = 0; |
| ASSERT (unsetenv (NULL) == -1); |
| ASSERT (errno == EINVAL); |
| #endif |
| |
| return 0; |
| } |