test-skeleton.c

   1 /* Skeleton for test programs.
   2    Copyright (C) 1998, 2000, 2001, 2002 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 pid_t 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 /* Create a temporary file.  */
  94 static int
  95 __attribute__ ((unused))
  96 create_temp_file (const char *base, char **filename)
  97 {
  98   char *fname;
  99   int fd;
 100
 101   fname = (char *) malloc (strlen (test_dir) + 1 + strlen (base)
 102                            + sizeof ("XXXXXX"));
 103   if (fname == NULL)
 104     {
 105       puts ("out of memory");
 106       return -1;
 107     }
 108   strcpy (stpcpy (stpcpy (stpcpy (fname, test_dir), "/"), base), "XXXXXX");
 109
 110   fd = mkstemp (fname);
 111   if (fd == -1)
 112     {
 113       printf ("cannot open temporary file '%s': %m\n", fname);
 114       free (fname);
 115       return -1;
 116     }
 117
 118   add_temp_file (fname);
 119   if (filename != NULL)
 120     *filename = fname;
 121
 122   return fd;
 123 }
 124
 125 /* Timeout handler.  We kill the child and exit with an error.  */
 126 static void
 127 __attribute__ ((noreturn))
 128 timeout_handler (int sig __attribute__ ((unused)))
 129 {
 130   int killed;
 131   int status;
 132
 133   /* Send signal.  */
 134   kill (pid, SIGKILL);
 135
 136   /* Wait for it to terminate.  */
 137   killed = waitpid (pid, &status, WNOHANG|WUNTRACED);
 138   if (killed != 0 && killed != pid)
 139     {
 140       perror ("Failed to killed test process");
 141       exit (1);
 142     }
 143
 144 #ifdef CLEANUP_HANDLER
 145   CLEANUP_HANDLER;
 146 #endif
 147
 148   if (WIFSIGNALED (status) && WTERMSIG (status) == SIGKILL)
 149     fputs ("Timed out: killed the child process\n", stderr);
 150   else if (WIFSTOPPED (status))
 151     fprintf (stderr, "Timed out: the child process was %s\n",
 152              strsignal (WSTOPSIG (status)));
 153   else if (WIFSIGNALED (status))
 154     fprintf (stderr, "Timed out: the child process got signal %s\n",
 155              strsignal (WTERMSIG (status)));
 156   else
 157     fprintf (stderr, "Timed out: killed the child process but it exited %d\n",
 158              WEXITSTATUS (status));
 159
 160   /* Exit with an error.  */
 161   exit (1);
 162 }
 163
 164 /* We provide the entry point here.  */
 165 int
 166 main (int argc, char *argv[])
 167 {
 168   int direct = 0;       /* Directly call the test function?  */
 169   int status;
 170   int opt;
 171   pid_t termpid;
 172
 173 #ifdef STDOUT_UNBUFFERED
 174   setbuf (stdout, NULL);
 175 #endif
 176
 177   while ((opt = getopt_long (argc, argv, "", options, NULL)) != -1)
 178     switch (opt)
 179       {
 180       case '?':
 181         exit (1);
 182       case OPT_DIRECT:
 183         direct = 1;
 184         break;
 185       case OPT_TESTDIR:
 186         test_dir = optarg;
 187         break;
 188 #ifdef CMDLINE_PROCESS
 189         CMDLINE_PROCESS
 190 #endif
 191       }
 192
 193   /* Set TMPDIR to specified test directory.  */
 194   if (test_dir != NULL)
 195     {
 196       setenv ("TMPDIR", test_dir, 1);
 197
 198       if (chdir (test_dir) < 0)
 199         {
 200           perror ("chdir");
 201           exit (1);
 202         }
 203     }
 204   else
 205     {
 206       test_dir = getenv ("TMPDIR");
 207       if (test_dir == NULL || test_dir[0] == '\0')
 208         test_dir = "/tmp";
 209     }
 210
 211   /* Make sure we see all message, even those on stdout.  */
 212   setvbuf (stdout, NULL, _IONBF, 0);
 213
 214   /* make sure temporary files are deleted.  */
 215   atexit (delete_temp_files);
 216
 217   /* Correct for the possible parameters.  */
 218   argv += optind - 1;
 219   argc -= optind - 1;
 220
 221   /* Call the initializing function, if one is available.  */
 222 #ifdef PREPARE
 223   PREPARE (argc, argv);
 224 #endif
 225
 226   /* If we are not expected to fork run the function immediately.  */
 227   if (direct)
 228     return TEST_FUNCTION;
 229
 230   /* Set up the test environment:
 231      - prevent core dumps
 232      - set up the timer
 233      - fork and execute the function.  */
 234
 235   pid = fork ();
 236   if (pid == 0)
 237     {
 238       /* This is the child.  */
 239 #ifdef RLIMIT_CORE
 240       /* Try to avoid dumping core.  */
 241       struct rlimit core_limit;
 242       core_limit.rlim_cur = 0;
 243       core_limit.rlim_max = 0;
 244       setrlimit (RLIMIT_CORE, &core_limit);
 245 #endif
 246
 247       /* We put the test process in its own pgrp so that if it bogusly
 248          generates any job control signals, they won't hit the whole build.  */
 249       setpgid (0, 0);
 250
 251       /* Execute the test function and exit with the return value.   */
 252       exit (TEST_FUNCTION);
 253     }
 254   else if (pid < 0)
 255     {
 256       perror ("Cannot fork test program");
 257       exit (1);
 258     }
 259
 260   /* Set timeout.  */
 261 #ifndef TIMEOUT
 262   /* Default timeout is two seconds.  */
 263 # define TIMEOUT 2
 264 #endif
 265   alarm (TIMEOUT);
 266   signal (SIGALRM, timeout_handler);
 267
 268   /* Wait for the regular termination.  */
 269   termpid = waitpid (pid, &status, 0);
 270   if (termpid == -1)
 271     {
 272       printf ("Waiting for test program failed: %m\n");
 273       exit (1);
 274     }
 275   if (termpid != pid)
 276     {
 277       printf ("Oops, wrong test program terminated: expected %ld, got %ld\n",
 278               (long int) pid, (long int) termpid);
 279       exit (1);
 280     }
 281
 282 #ifndef EXPECTED_SIGNAL
 283   /* We don't expect any signal.  */
 284 # define EXPECTED_SIGNAL 0
 285 #endif
 286   if (WTERMSIG (status) != EXPECTED_SIGNAL)
 287     {
 288       if (EXPECTED_SIGNAL != 0)
 289         {
 290           if (WTERMSIG (status) == 0)
 291             fprintf (stderr,
 292                      "Expected signal '%s' from child, got none\n",
 293                      strsignal (EXPECTED_SIGNAL));
 294           else
 295             fprintf (stderr,
 296                      "Incorrect signal from child: got `%s', need `%s'\n",
 297                      strsignal (WTERMSIG (status)),
 298                      strsignal (EXPECTED_SIGNAL));
 299         }
 300       else
 301         fprintf (stderr, "Didn't expect signal from child: got `%s'\n",
 302                  strsignal (WTERMSIG (status)));
 303       exit (1);
 304     }
 305
 306   /* Simply exit with the return value of the test.  */
 307   return WEXITSTATUS (status);
 308 }