posix/tst-execvpe5.c

   1 /* General tests for execpve.
   2    Copyright (C) 2016-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <wait.h>
  25
  26
  27 /* Nonzero if the program gets called via `exec'.  */
  28 static int restart;
  29
  30
  31 #define CMDLINE_OPTIONS \
  32   { "restart", no_argument, &restart, 1 },
  33
  34 /* Prototype for our test function.  */
  35 extern void do_prepare (int argc, char *argv[]);
  36 extern int do_test (int argc, char *argv[]);
  37
  38 #include "../test-skeleton.c"
  39
  40 #define EXECVPE_KEY    "EXECVPE_ENV"
  41 #define EXECVPE_VALUE  "execvpe_test"
  42
  43
  44 static int
  45 handle_restart (void)
  46 {
  47   /* First check if only one variable is passed on execvpe.  */
  48   int env_count = 0;
  49   for (char **e = environ; *e != NULL; ++e)
  50     if (++env_count == INT_MAX)
  51       {
  52         printf ("Environment variable number overflow");
  53         exit (EXIT_FAILURE);
  54       }
  55   if (env_count != 1)
  56     {
  57       printf ("Wrong number of environment variables");
  58       exit (EXIT_FAILURE);
  59     }
  60
  61   /* Check if the combinarion os "EXECVPE_ENV=execvpe_test"  */
  62   const char *env = getenv (EXECVPE_KEY);
  63   if (env == NULL)
  64     {
  65       printf ("Test environment variable not found");
  66       exit (EXIT_FAILURE);
  67     }
  68
  69   if (strncmp (env, EXECVPE_VALUE, sizeof (EXECVPE_VALUE)))
  70     {
  71       printf ("Test environment variable with wrong value");
  72       exit (EXIT_FAILURE);
  73     }
  74
  75   return 0;
  76 }
  77
  78
  79 int
  80 do_test (int argc, char *argv[])
  81 {
  82   pid_t pid;
  83   int status;
  84
  85   /* We must have
  86      - one or four parameters left if called initially
  87        + path for ld.so         optional
  88        + "--library-path"       optional
  89        + the library path       optional
  90        + the application name
  91
  92     if --enable-hardcoded-path-in-tests is used, just
  93       + the application name
  94   */
  95
  96   if (restart)
  97     {
  98       if (argc != 1)
  99         {
 100           printf ("Wrong number of arguments (%d) in restart\n", argc);
 101           exit (EXIT_FAILURE);
 102         }
 103
 104       return handle_restart ();
 105     }
 106
 107   if (argc != 2 && argc != 5)
 108     {
 109       printf ("Wrong number of arguments (%d)\n", argc);
 110       exit (EXIT_FAILURE);
 111     }
 112
 113   /* We want to test the `execvpe' function.  To do this we restart the
 114      program with an additional parameter.  */
 115   pid = fork ();
 116   if (pid == 0)
 117     {
 118       /* This is the child.  Construct the command line.  */
 119
 120       /* We cast here to char* because the test itself does not modify neither
 121          the argument nor the environment list.  */
 122       char *envs[] = { (char*)(EXECVPE_KEY "=" EXECVPE_VALUE), NULL };
 123       if (argc == 5)
 124         {
 125           char *args[] = { argv[1], argv[2], argv[3], argv[4],
 126                            (char *) "--direct", (char *) "--restart", NULL };
 127           execvpe (args[0], args, envs);
 128         }
 129       else
 130         {
 131           char *args[] = { argv[0],
 132                            (char *) "--direct", (char *) "--restart", NULL };
 133           execvpe (args[0], args, envs);
 134         }
 135
 136       puts ("Cannot exec");
 137       exit (EXIT_FAILURE);
 138     }
 139   else if (pid == (pid_t) -1)
 140     {
 141       puts ("Cannot fork");
 142       return 1;
 143     }
 144
 145   /* Wait for the child.  */
 146   if (waitpid (pid, &status, 0) != pid)
 147     {
 148       puts ("Wrong child");
 149       return 1;
 150     }
 151
 152   if (WTERMSIG (status) != 0)
 153     {
 154       puts ("Child terminated incorrectly");
 155       return 1;
 156     }
 157   status = WEXITSTATUS (status);
 158
 159   return status;
 160 }