test-skeleton.c

   1 /* Skeleton for test programs.
   2    Copyright (C) 1998, 2000, 2001 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <getopt.h>
  22 #include <search.h>
  23 #include <signal.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <sys/resource.h>
  29 #include <sys/wait.h>
  30
  31 /* The test function is normally called `do_test' and it is called
  32    with argc and argv as the arguments.  We nevertheless provide the
  33    possibility to overwrite this name.  */
  34 #ifndef TEST_FUNCTION
  35 # define TEST_FUNCTION do_test (argc, argv)
  36 #endif
  37
  38
  39 #define OPT_DIRECT 1000
  40 #define OPT_TESTDIR 1001
  41
  42 static struct option options[] =
  43 {
  44 #ifdef CMDLINE_OPTIONS
  45   CMDLINE_OPTIONS
  46 #endif
  47   { "direct", no_argument, NULL, OPT_DIRECT },
  48   { "test-dir", required_argument, NULL, OPT_TESTDIR },
  49   { NULL, 0, NULL, 0 }
  50 };
  51
  52 /* PID of the test itself.  */
  53 static int pid;
  54
  55 /* Directory to place temporary files in.  */
  56 static const char *test_dir;
  57
  58 /* List of temporary files.  */
  59 struct temp_name_list
  60 {
  61   struct qelem q;
  62   const char *name;
  63 } *temp_name_list;
  64
  65 /* Add temporary files in list.  */
  66 static void
  67 __attribute__ ((unused))
  68 add_temp_file (const char *name)
  69 {
  70   struct temp_name_list *newp
  71     = (struct temp_name_list *) calloc (sizeof (*newp), 1);
  72   if (newp != NULL)
  73     {
  74       newp->name = name;
  75       if (temp_name_list == NULL)
  76         temp_name_list = (struct temp_name_list *) &newp->q;
  77       else
  78         insque (newp, temp_name_list);
  79     }
  80 }
  81
  82 /* Delete all temporary files.  */
  83 static void
  84 delete_temp_files (void)
  85 {
  86   while (temp_name_list != NULL)
  87     {
  88       remove (temp_name_list->name);
  89       temp_name_list = (struct temp_name_list *) temp_name_list->q.q_forw;
  90     }
  91 }
  92
  93 /* Timeout handler.  We kill the child and exit with an error.  */
  94 static void
  95 __attribute__ ((noreturn))
  96 timeout_handler (int sig __attribute__ ((unused)))
  97 {
  98   int killed;
  99
 100   /* Send signal.  */
 101   kill (pid, SIGKILL);
 102
 103   /* Wait for it to terminate.  */
 104   killed = waitpid (pid, NULL, WNOHANG);
 105   if (killed != 0 && killed != pid)
 106     {
 107       perror ("Failed to killed test process");
 108       exit (1);
 109     }
 110
 111 #ifdef CLEANUP_HANDLER
 112   CLEANUP_HANDLER;
 113 #endif
 114
 115   fputs ("Timed out: killed the child process\n", stderr);
 116
 117   /* Exit with an error.  */
 118   exit (1);
 119 }
 120
 121 /* We provide the entry point here.  */
 122 int
 123 main (int argc, char *argv[])
 124 {
 125   int direct = 0;       /* Directly call the test function?  */
 126   int status;
 127   int opt;
 128
 129 #ifdef STDOUT_UNBUFFERED
 130   setbuf (stdout, NULL);
 131 #endif
 132
 133   while ((opt = getopt_long (argc, argv, "", options, NULL)) != -1)
 134     switch (opt)
 135       {
 136       case '?':
 137         exit (1);
 138       case OPT_DIRECT:
 139         direct = 1;
 140         break;
 141       case OPT_TESTDIR:
 142         test_dir = optarg;
 143         break;
 144 #ifdef CMDLINE_PROCESS
 145         CMDLINE_PROCESS
 146 #endif
 147       }
 148
 149   /* Set TMPDIR to specified test directory.  */
 150   if (test_dir != NULL)
 151     {
 152       setenv ("TMPDIR", test_dir, 1);
 153
 154       if (chdir (test_dir) < 0)
 155         {
 156           perror ("chdir");
 157           exit (1);
 158         }
 159     }
 160   else
 161     {
 162       test_dir = getenv ("TMPDIR");
 163       if (test_dir == NULL || test_dir[0] == '\0')
 164         test_dir = "/tmp";
 165     }
 166
 167   /* Make sure we see all message, even those on stdout.  */
 168   setvbuf (stdout, NULL, _IONBF, 0);
 169
 170   /* make sure temporary files are deleted.  */
 171   atexit (delete_temp_files);
 172
 173   /* Correct for the possible parameters.  */
 174   argv += optind - 1;
 175   argc -= optind - 1;
 176
 177   /* Call the initializing function, if one is available.  */
 178 #ifdef PREPARE
 179   PREPARE (argc, argv);
 180 #endif
 181
 182   /* If we are not expected to fork run the function immediately.  */
 183   if (direct)
 184     return TEST_FUNCTION;
 185
 186   /* Set up the test environment:
 187      - prevent core dumps
 188      - set up the timer
 189      - fork and execute the function.  */
 190
 191   pid = fork ();
 192   if (pid == 0)
 193     {
 194       /* This is the child.  */
 195 #ifdef RLIMIT_CORE
 196       /* Try to avoid dumping core.  */
 197       struct rlimit core_limit;
 198       core_limit.rlim_cur = 0;
 199       core_limit.rlim_max = 0;
 200       setrlimit (RLIMIT_CORE, &core_limit);
 201 #endif
 202
 203       /* Execute the test function and exit with the return value.   */
 204       exit (TEST_FUNCTION);
 205     }
 206   else if (pid < 0)
 207     {
 208       perror ("Cannot fork test program");
 209       exit (1);
 210     }
 211
 212   /* Set timeout.  */
 213 #ifndef TIMEOUT
 214   /* Default timeout is two seconds.  */
 215 # define TIMEOUT 2
 216 #endif
 217   alarm (TIMEOUT);
 218   signal (SIGALRM, timeout_handler);
 219
 220   /* Wait for the regular termination.  */
 221   if (waitpid (pid, &status, 0) != pid)
 222     {
 223       perror ("Oops, wrong test program terminated");
 224       exit (1);
 225     }
 226
 227 #ifndef EXPECTED_SIGNAL
 228   /* We don't expect any signal.  */
 229 # define EXPECTED_SIGNAL 0
 230 #endif
 231   if (WTERMSIG (status) != EXPECTED_SIGNAL)
 232     {
 233       if (EXPECTED_SIGNAL != 0)
 234         fprintf (stderr, "Incorrect signal from child: got `%s', need `%s'\n",
 235                  strsignal (WTERMSIG (status)), strsignal (EXPECTED_SIGNAL));
 236       else
 237         fprintf (stderr, "Didn't expect signal from child: got `%s'\n",
 238                  strsignal (WTERMSIG (status)));
 239       exit (1);
 240     }
 241
 242   /* Simply exit with the return value of the test.  */
 243   return WEXITSTATUS (status);
 244 }