| /* Copyright (C) 1999, 2004 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| |
| #define VAR "FOOBAR" |
| |
| char putenv_val[100] = VAR "=some longer value"; |
| |
| int |
| main (void) |
| { |
| int result = 0; |
| const char *valp; |
| |
| /* First test: remove entry FOOBAR, whether it exists or not. */ |
| unsetenv (VAR); |
| |
| /* Now getting the value should fail. */ |
| if (getenv (VAR) != NULL) |
| { |
| printf ("There should be no `%s' value\n", VAR); |
| result = 1; |
| } |
| |
| /* Now add a value, with the replace flag cleared. */ |
| if (setenv (VAR, "one", 0) != 0) |
| { |
| printf ("setenv #1 failed: %m\n"); |
| result = 1; |
| } |
| |
| /* Getting this value should now be possible. */ |
| valp = getenv (VAR); |
| if (valp == NULL || strcmp (valp, "one") != 0) |
| { |
| puts ("getenv #2 failed"); |
| result = 1; |
| } |
| |
| /* Try to replace without the replace flag set. This should fail. */ |
| if (setenv (VAR, "two", 0) != 0) |
| { |
| printf ("setenv #2 failed: %m\n"); |
| result = 1; |
| } |
| |
| /* The value shouldn't have changed. */ |
| valp = getenv (VAR); |
| if (valp == NULL || strcmp (valp, "one") != 0) |
| { |
| puts ("getenv #3 failed"); |
| result = 1; |
| } |
| |
| /* Now replace the value using putenv. */ |
| if (putenv (putenv_val) != 0) |
| { |
| printf ("putenv #1 failed: %m\n"); |
| result = 1; |
| } |
| |
| /* The value should have changed now. */ |
| valp = getenv (VAR); |
| if (valp == NULL || strcmp (valp, "some longer value") != 0) |
| { |
| printf ("getenv #4 failed (is \"%s\")\n", valp); |
| result = 1; |
| } |
| |
| /* Now one tricky check: changing the variable passed in putenv should |
| change the environment. */ |
| strcpy (&putenv_val[sizeof VAR], "a short one"); |
| |
| /* The value should have changed again. */ |
| valp = getenv (VAR); |
| if (valp == NULL || strcmp (valp, "a short one") != 0) |
| { |
| puts ("getenv #5 failed"); |
| result = 1; |
| } |
| |
| /* It should even be possible to rename the variable. */ |
| strcpy (putenv_val, "XYZZY=some other value"); |
| |
| /* Now a lookup using the old name should fail. */ |
| if (getenv (VAR) != NULL) |
| { |
| puts ("getenv #6 failed"); |
| result = 1; |
| } |
| |
| /* But using the new name it should work. */ |
| valp = getenv ("XYZZY"); |
| if (valp == NULL || strcmp (valp, "some other value") != 0) |
| { |
| puts ("getenv #7 failed"); |
| result = 1; |
| } |
| |
| /* Create a new variable with the old name. */ |
| if (setenv (VAR, "a new value", 0) != 0) |
| { |
| printf ("setenv #3 failed: %m\n"); |
| result = 1; |
| } |
| |
| /* At this point a getenv call must return the new value. */ |
| valp = getenv (VAR); |
| if (valp == NULL || strcmp (valp, "a new value") != 0) |
| { |
| puts ("getenv #8 failed"); |
| result = 1; |
| } |
| |
| /* Black magic: rename the variable we added using putenv back. */ |
| strcpy (putenv_val, VAR "=old name new value"); |
| |
| /* This is interesting. We have two variables with the same name. |
| Getting a value should return one of them. */ |
| valp = getenv (VAR); |
| if (valp == NULL |
| || (strcmp (valp, "a new value") != 0 |
| && strcmp (valp, "old name new value") != 0)) |
| { |
| puts ("getenv #9 failed"); |
| result = 1; |
| } |
| |
| /* More fun ahead: we are now removing the variable. This should remove |
| both values. The cast is ok: this call should never put the string |
| in the environment and it should never modify it. */ |
| putenv ((char *) VAR); |
| |
| /* Getting the value should now fail. */ |
| if (getenv (VAR) != NULL) |
| { |
| printf ("getenv #10 failed (\"%s\" found)\n", getenv (VAR)); |
| result = 1; |
| } |
| |
| /* Now a test with an environment variable that's one character long. |
| This is to test a special case in the getenv implementation. */ |
| strcpy (putenv_val, "X=one character test"); |
| if (putenv (putenv_val) != 0) |
| { |
| printf ("putenv #2 failed: %m\n"); |
| result = 1; |
| } |
| |
| valp = getenv ("X"); |
| if (valp == NULL || strcmp (valp, "one character test") != 0) |
| { |
| puts ("getenv #11 failed"); |
| result = 1; |
| } |
| |
| /* Both setenv and unsetenv should return -1/EINVAL for NULL or "" name |
| or if name contains '=' character. */ |
| errno = 0; |
| if (setenv (NULL, "val", 1) >= 0 || errno != EINVAL) |
| { |
| puts ("setenv #4 failed"); |
| result = 1; |
| } |
| |
| errno = 0; |
| if (setenv ("", "val", 0) >= 0 || errno != EINVAL) |
| { |
| puts ("setenv #5 failed"); |
| result = 1; |
| } |
| |
| errno = 0; |
| if (setenv ("var=val", "val", 1) >= 0 || errno != EINVAL) |
| { |
| puts ("setenv #6 failed"); |
| result = 1; |
| } |
| |
| errno = 0; |
| if (unsetenv (NULL) >= 0 || errno != EINVAL) |
| { |
| puts ("unsetenv #1 failed"); |
| result = 1; |
| } |
| |
| errno = 0; |
| if (unsetenv ("") >= 0 || errno != EINVAL) |
| { |
| puts ("unsetenv #2 failed"); |
| result = 1; |
| } |
| |
| errno = 0; |
| if (unsetenv ("x=y") >= 0 || errno != EINVAL) |
| { |
| puts ("unsetenv #3 failed"); |
| result = 1; |
| } |
| |
| return result; |
| } |