test-skeleton.c

   1 /* Skeleton for test programs.
   2    Copyright (C) 1998, 2000 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 <search.h>
  22 #include <signal.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/resource.h>
  28 #include <sys/wait.h>
  29
  30 /* The test function is normally called `do_test' and it is called
  31    with argc and argv as the arguments.  We nevertheless provide the
  32    possibility to overwrite this name.  */
  33 #ifndef TEST_FUNCTION
  34 # define TEST_FUNCTION do_test (argc, argv)
  35 #endif
  36
  37
  38 #define OPT_DIRECT 1000
  39 #define OPT_TESTDIR 1001
  40
  41 static struct option options[] =
  42 {
  43 #ifdef CMDLINE_OPTIONS
  44   CMDLINE_OPTIONS
  45 #endif
  46   { "direct", no_argument, NULL, OPT_DIRECT },
  47   { "test-dir", required_argument, NULL, OPT_TESTDIR },
  48   { NULL, 0, NULL, 0 }
  49 };
  50
  51 /* PID of the test itself.  */
  52 static int pid;
  53
  54 /* Directory to place temporary files in.  */
  55 static const char *test_dir;
  56
  57 /* List of temporary files.  */
  58 struct name_list
  59 {
  60   struct qelem q;
  61   const char *name;
  62 } *name_list;
  63
  64 /* Add temporary files in list.  */
  65 void
  66 add_temp_file (const char *name)
  67 {
  68   struct name_list *newp = (struct name_list *) calloc (sizeof (*newp), 1);
  69   if (newp != NULL)
  70     {
  71       newp->name = name;
  72       if (name_list == NULL)
  73         name_list = (struct name_list *) &newp->q;
  74       else
  75         insque (newp, name_list);
  76     }
  77 }
  78
  79 /* Delete all temporary files.  */
  80 void
  81 delete_temp_files (void)
  82 {
  83   while (name_list != NULL)
  84     {
  85       remove (name_list->name);
  86       name_list = (struct name_list *) name_list->q.q_forw;
  87     }
  88 }
  89
  90 /* Timeout handler.  We kill the child and exit with an error.  */
  91 void
  92 timeout_handler (int sig __attribute__ ((unused)))
  93 {
  94   int killed;
  95
  96   /* Send signal.  */
  97   kill (pid, SIGKILL);
  98
  99   /* Wait for it to terminate.  */
 100   killed = waitpid (pid, NULL, WNOHANG);
 101   if (killed != 0 && killed != pid)
 102     {
 103       perror ("Failed to killed test process");
 104       exit (1);
 105     }
 106
 107 #ifdef CLEANUP_HANDLER
 108   CLEANUP_HANDLER;
 109 #endif
 110
 111   fputs ("Timed out: killed the child process\n", stderr);
 112
 113   /* Exit with an error.  */
 114   exit (1);
 115 }
 116
 117 /* We provide the entry point here.  */
 118 int
 119 main (int argc, char *argv[])
 120 {
 121   int direct = 0;       /* Directly call the test function?  */
 122   int status;
 123   int opt;
 124
 125   while ((opt = getopt_long (argc, argv, "", options, NULL)) != -1)
 126     switch (opt)
 127       {
 128       case '?':
 129         exit (1);
 130       case OPT_DIRECT:
 131         direct = 1;
 132         break;
 133       case OPT_TESTDIR:
 134         test_dir = optarg;
 135         break;
 136 #ifdef CMDLINE_PROCESS
 137         CMDLINE_PROCESS
 138 #endif
 139       }
 140
 141   /* Set TMPDIR to specified test directory.  */
 142   if (test_dir != NULL)
 143     {
 144       setenv ("TMPDIR", test_dir, 1);
 145
 146       if (chdir (test_dir) < 0)
 147         {
 148           perror ("chdir");
 149           exit (1);
 150         }
 151     }
 152   else
 153     {
 154       test_dir = getenv ("TMPDIR");
 155       if (test_dir == NULL || test_dir[0] == '\0')
 156         test_dir = "/tmp";
 157     }
 158
 159   /* Make sure we see all message, even those on stdout.  */
 160   setvbuf (stdout, NULL, _IONBF, 0);
 161
 162   /* make sure temporary files are deleted.  */
 163   atexit (delete_temp_files);
 164
 165   /* Call the initializing function, if one is available.  */
 166 #ifdef PREPARE
 167   PREPARE (argc, argv);
 168 #endif
 169
 170   /* If we are not expected to fork run the function immediately.  */
 171   if (direct)
 172     return TEST_FUNCTION;
 173
 174   /* Set up the test environment:
 175      - prevent core dumps
 176      - set up the timer
 177      - fork and execute the function.  */
 178
 179   pid = fork ();
 180   if (pid == 0)
 181     {
 182       /* This is the child.  */
 183 #ifdef RLIMIT_CORE
 184       /* Try to avoid dumping core.  */
 185       struct rlimit core_limit;
 186       core_limit.rlim_cur = 0;
 187       core_limit.rlim_max = 0;
 188       setrlimit (RLIMIT_CORE, &core_limit);
 189 #endif
 190
 191       /* Execute the test function and exit with the return value.   */
 192       exit (TEST_FUNCTION);
 193     }
 194   else if (pid < 0)
 195     {
 196       perror ("Cannot fork test program");
 197       exit (1);
 198     }
 199
 200   /* Set timeout.  */
 201 #ifndef TIMEOUT
 202   /* Default timeout is two seconds.  */
 203 # define TIMEOUT 2
 204 #endif
 205   alarm (TIMEOUT);
 206   signal (SIGALRM, timeout_handler);
 207
 208   /* Wait for the regular termination.  */
 209   if (waitpid (pid, &status, 0) != pid)
 210     {
 211       perror ("Oops, wrong test program terminated");
 212       exit (1);
 213     }
 214
 215 #ifndef EXPECTED_SIGNAL
 216   /* We don't expect any signal.  */
 217 # define EXPECTED_SIGNAL 0
 218 #endif
 219   if (WTERMSIG (status) != EXPECTED_SIGNAL)
 220     {
 221       if (EXPECTED_SIGNAL != 0)
 222         fprintf (stderr, "Incorrect signal from child: got `%s', need `%s'\n",
 223                  strsignal (WTERMSIG (status)), strsignal (EXPECTED_SIGNAL));
 224       else
 225         fprintf (stderr, "Didn't expect signal from child: got `%s'\n",
 226                  strsignal (WTERMSIG (status)));
 227       exit (1);
 228     }
 229
 230   /* Simply exit with the return value of the test.  */
 231   return WEXITSTATUS (status);
 232 }