LCOV - code coverage report
Current view: top level - gltests - test-unsetenv.c (source / functions) Hit Total Coverage
Test: GNU Libidn Lines: 15 15 100.0 %
Date: 2015-08-01 15:30:48 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* Tests of unsetenv.
       2             :    Copyright (C) 2009-2015 Free Software Foundation, Inc.
       3             : 
       4             :    This program is free software: you can redistribute it and/or modify
       5             :    it under the terms of the GNU General Public License as published by
       6             :    the Free Software Foundation; either version 3 of the License, or
       7             :    (at your option) any later version.
       8             : 
       9             :    This program is distributed in the hope that it will be useful,
      10             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12             :    GNU General Public License for more details.
      13             : 
      14             :    You should have received a copy of the GNU General Public License
      15             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      16             : 
      17             : /* Written by Eric Blake <ebb9@byu.net>, 2009.  */
      18             : 
      19             : #include <config.h>
      20             : 
      21             : #include <stdlib.h>
      22             : 
      23             : #include "signature.h"
      24             : SIGNATURE_CHECK (unsetenv, int, (char const *));
      25             : 
      26             : #include <errno.h>
      27             : #include <string.h>
      28             : #include <unistd.h>
      29             : 
      30             : #include "macros.h"
      31             : 
      32             : int
      33           1 : main (void)
      34             : {
      35           1 :   char entry[] = "b=2";
      36             : 
      37             :   /* Test removal when multiple entries present.  */
      38           1 :   ASSERT (putenv ((char *) "a=1") == 0);
      39           1 :   ASSERT (putenv (entry) == 0);
      40           1 :   entry[0] = 'a'; /* Unspecified what getenv("a") would be at this point.  */
      41           1 :   ASSERT (unsetenv ("a") == 0); /* Both entries will be removed.  */
      42           1 :   ASSERT (getenv ("a") == NULL);
      43           1 :   ASSERT (unsetenv ("a") == 0);
      44             : 
      45             :   /* Required to fail with EINVAL.  */
      46           1 :   errno = 0;
      47           1 :   ASSERT (unsetenv ("") == -1);
      48           1 :   ASSERT (errno == EINVAL);
      49           1 :   errno = 0;
      50           1 :   ASSERT (unsetenv ("a=b") == -1);
      51           1 :   ASSERT (errno == EINVAL);
      52             : #if 0
      53             :   /* glibc and gnulib's implementation guarantee this, but POSIX no
      54             :      longer requires it: http://austingroupbugs.net/view.php?id=185  */
      55             :   errno = 0;
      56             :   ASSERT (unsetenv (NULL) == -1);
      57             :   ASSERT (errno == EINVAL);
      58             : #endif
      59             : 
      60           1 :   return 0;
      61             : }

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