tests/test-putenv.c

   1 /* Test the putenv function.
   2    Copyright (C) 2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published
   6    by the Free Software Foundation, either version 3 of the License,
   7    or (at your option) any later version.
   8
   9    This file 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 Collin Funk <collin.funk1@gmail.com>, 2024.  */
  18
  19 #include <config.h>
  20
  21 /* Specification.  */
  22 #include <stdlib.h>
  23
  24 #include "signature.h"
  25 SIGNATURE_CHECK (putenv, int, (char *));
  26
  27 #include <string.h>
  28
  29 #include "macros.h"
  30
  31 int
  32 main (void)
  33 {
  34   char *ptr;
  35
  36   /* Verify the environment is clean.  */
  37   unsetenv ("TEST_VAR");
  38   ASSERT (getenv ("TEST_VAR") == NULL);
  39
  40   /* Use static on variables passed to the environment to pacify
  41      -Wanalyzer-putenv-of-auto-var.  */
  42
  43   /* Verify adding an environment variable.  */
  44   {
  45     static char var[] = "TEST_VAR=abc";
  46     ASSERT (putenv (var) == 0);
  47     ptr = getenv ("TEST_VAR");
  48     ASSERT (ptr != NULL);
  49     ASSERT (STREQ (ptr, "abc"));
  50   }
  51
  52   /* Verify removing an environment variable.  */
  53   {
  54     static char var[] = "TEST_VAR";
  55     ASSERT (putenv (var) == 0);
  56     ASSERT (getenv ("TEST_VAR") == NULL);
  57   }
  58
  59   /* Verify the behavior when removing a variable not in the environment.  */
  60   {
  61     static char var[] = "TEST_VAR";
  62     ASSERT (putenv (var) == 0);
  63     ASSERT (getenv ("TEST_VAR") == NULL);
  64   }
  65
  66   return test_exit_status;
  67 }