Line data    Source code

       1             : /* Tests of setenv.
       2             :    Copyright (C) 2009-2020 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 <https://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 (setenv, int, (char const *, char const *, int));
      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             :   /* Test overwriting.  */
      36           1 :   ASSERT (setenv ("a", "==", -1) == 0);
      37           1 :   ASSERT (setenv ("a", "2", 0) == 0);
      38           1 :   ASSERT (strcmp (getenv ("a"), "==") == 0);
      39             : 
      40             :   /* Required to fail with EINVAL.  */
      41           1 :   errno = 0;
      42           1 :   ASSERT (setenv ("", "", 1) == -1);
      43           1 :   ASSERT (errno == EINVAL);
      44           1 :   errno = 0;
      45           1 :   ASSERT (setenv ("a=b", "", 0) == -1);
      46           1 :   ASSERT (errno == EINVAL);
      47             : #if 0
      48             :   /* glibc and gnulib's implementation guarantee this, but POSIX no
      49             :      longer requires it: http://austingroupbugs.net/view.php?id=185  */
      50             :   errno = 0;
      51             :   ASSERT (setenv (NULL, "", 0) == -1);
      52             :   ASSERT (errno == EINVAL);
      53             : #endif
      54             : 
      55           1 :   return 0;
      56             : }