tools/regression/environ/retention.c

   1 /*-
   2  * Copyright (c) 2007 Sean C. Farley <scf@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification, immediately at the beginning of the file.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34
  35 extern char **environ;
  36 const char *envName = "FOOBAR";
  37 const char *envValSmall = "Hi";
  38 const char *envValLarge = "Hi, again";
  39 const char *envValAny = "Any value";
  40
  41
  42 int
  43 main(int argc, char **argv)
  44 {
  45         const char *env1 = NULL;
  46         const char *env2 = NULL;
  47         const char *env3 = NULL;
  48         const char *env4 = NULL;
  49         const char *env5 = NULL;
  50         int testNdx;
  51
  52         /* Clean slate. */
  53         environ = NULL;
  54         testNdx = 0;
  55
  56         /* Initial value of variable. */
  57         if (getenv(envName) != NULL)
  58                 printf("not ");
  59         printf("ok %d - getenv(\"%s\")\n", ++testNdx, envName);
  60
  61         /* Set value of variable to smaller value and get value. */
  62         if ((setenv(envName, envValSmall, 1) != 0) ||
  63             ((env1 = getenv(envName)) == NULL) ||
  64             (strcmp(env1, envValSmall) != 0))
  65                 printf("not ");
  66         printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
  67             envValSmall);
  68
  69         /* Unset variable. */
  70         if ((unsetenv(envName) == -1) || ((env2 = getenv(envName)) != NULL))
  71                 printf("not ");
  72         printf("ok %d - unsetenv(\"%s\")\n", ++testNdx, envName);
  73
  74         /* Set variable to bigger value and get value. */
  75         if ((setenv(envName, envValLarge, 1) != 0) ||
  76             ((env3 = getenv(envName)) == NULL) ||
  77             (strcmp(env3, envValLarge) != 0))
  78                 printf("not ");
  79         printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
  80             envValLarge);
  81
  82         /* Set variable to smaller value and get value. */
  83         if ((setenv(envName, envValSmall, 1) != 0) ||
  84             ((env4 = getenv(envName)) == NULL) ||
  85             (strcmp(env4, envValSmall) != 0))
  86                 printf("not ");
  87         printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
  88             envValSmall);
  89
  90         /* Set variable to any value without overwrite and get value. */
  91         if ((setenv(envName, envValAny, 0) != 0) ||
  92             ((env5 = getenv(envName)) == NULL) ||
  93             (strcmp(env5, envValAny) == 0))
  94                 printf("not ");
  95         printf("ok %d - setenv(\"%s\", \"%s\", 0)\n", ++testNdx, envName,
  96             envValAny);
  97
  98         /*
  99          * Verify FreeBSD-ism about allowing a program to keep old pointers without
 100          * risk of segfaulting.
 101          */
 102         if ((strcmp(env1, envValSmall) != 0) ||
 103             (strcmp(env3, envValSmall) != 0) ||
 104             (strcmp(env4, envValSmall) != 0))
 105                 printf("not ");
 106         printf("ok %d - old variables point to valid memory\n", ++testNdx);
 107
 108         exit(EXIT_SUCCESS);
 109 }