test-skeleton.c

   1 /* Skeleton for test programs.
   2    Copyright (C) 1998 Free Software Foundation, Inc.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <getopt.h>
  21 #include <signal.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <sys/resource.h>
  26 #include <sys/wait.h>
  27
  28 /* The test function is normally called `do_test' and it is called
  29    with argc and argv as the arguments.  We nevertheless provide the
  30    possibility to overwrite this name.  */
  31 #ifndef TEST_FUNCTION
  32 # define TEST_FUNCTION do_test (argc, argv)
  33 #endif
  34
  35
  36 #define OPT_DIRECT 1000
  37 #define OPT_TESTDIR 1001
  38
  39 static struct option options[] =
  40 {
  41 #ifdef CMDLINE_OPTIONS
  42   CMDLINE_OPTIONS
  43 #endif
  44   { "direct", no_argument, NULL, OPT_DIRECT },
  45   { "test-dir", required_argument, NULL, OPT_TESTDIR },
  46   { NULL, 0, NULL, 0 }
  47 };
  48
  49 /* PID of the test itself.  */
  50 static int pid;
  51
  52 /* Directory to place temporary files in.  */
  53 static const char *test_dir;
  54
  55 /* Timeout handler.  We kill the child and exit with an error.  */
  56 void
  57 timeout_handler (int sig __attribute__ ((unused)))
  58 {
  59   int killed;
  60
  61   /* Send signal.  */
  62   kill (pid, SIGKILL);
  63
  64   /* Wait for it to terminate.  */
  65   killed = waitpid (pid, NULL, WNOHANG);
  66   if (killed != 0 && killed != pid)
  67     {
  68       perror ("Failed to killed test process");
  69       exit (1);
  70     }
  71
  72 #ifdef CLEANUP_HANDLER
  73   CLEANUP_HANDLER;
  74 #endif
  75
  76   fputs ("Timed out: killed the child process\n", stderr);
  77
  78   /* Exit with an error.  */
  79   exit (1);
  80 }
  81
  82 /* We provide the entry point here.  */
  83 int
  84 main (int argc, char *argv[])
  85 {
  86   int direct = 0;       /* Directly call the test function?  */
  87   int status;
  88   int opt;
  89
  90   while ((opt = getopt_long (argc, argv, "", options, NULL)) != -1)
  91     switch (opt)
  92       {
  93       case '?':
  94         exit (1);
  95       case OPT_DIRECT:
  96         direct = 1;
  97         break;
  98       case OPT_TESTDIR:
  99         test_dir = optarg;
 100         break;
 101 #ifdef CMDLINE_PROCESS
 102         CMDLINE_PROCESS
 103 #endif
 104       }
 105
 106   /* Set TMPDIR to specified test directory.  */
 107   if (test_dir != NULL)
 108     {
 109       setenv ("TMPDIR", test_dir, 1);
 110
 111       if (chdir (test_dir) < 0)
 112         {
 113           perror ("chdir");
 114           exit (1);
 115         }
 116     }
 117
 118   /* If we are not expected to fork run the function immediately.  */
 119   if (direct)
 120     return TEST_FUNCTION;
 121
 122   /* Set up the test environment:
 123      - prevent core dumps
 124      - set up the timer
 125      - fork and execute the function.  */
 126
 127   pid = fork ();
 128   if (pid == 0)
 129     {
 130       /* This is the child.  */
 131 #ifdef RLIMIT_CORE
 132       /* Try to avoid dumping core.  */
 133       struct rlimit core_limit;
 134       core_limit.rlim_cur = 0;
 135       core_limit.rlim_max = 0;
 136       setrlimit (RLIMIT_CORE, &core_limit);
 137 #endif
 138
 139       /* Execute the test function and exit with the return value.   */
 140       exit (TEST_FUNCTION);
 141     }
 142   else if (pid < 0)
 143     {
 144       perror ("Cannot fork test program");
 145       exit (1);
 146     }
 147
 148   /* Set timeout.  */
 149 #ifndef TIMEOUT
 150   /* Default timeout is two seconds.  */
 151 # define TIMEOUT 2
 152 #endif
 153   alarm (TIMEOUT);
 154   signal (SIGALRM, timeout_handler);
 155
 156   /* Wait for the regular termination.  */
 157   if (waitpid (pid, &status, 0) != pid)
 158     {
 159       perror ("Oops, wrong test program terminated");
 160       exit (1);
 161     }
 162
 163 #ifndef EXPECTED_SIGNAL
 164   /* We don't expect any signal.  */
 165 # define EXPECTED_SIGNAL 0
 166 #endif
 167   if (WIFSIGNALED (status) != EXPECTED_SIGNAL)
 168     {
 169       fprintf (stderr, "Incorrect signal from child: got `%s', need `%s'\n",
 170                strsignal (WIFSIGNALED (status)),
 171                strsignal (EXPECTED_SIGNAL));
 172       exit (1);
 173     }
 174
 175   /* Simply exit with the return value of the test.  */
 176   return WEXITSTATUS (status);
 177 }