posix/tst-vfork3.c

   1 /* Test for vfork functions.
   2    Copyright (C) 2007-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2007.
   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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <mcheck.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/wait.h>
  27
  28 static int do_test (void);
  29 static void do_prepare (void);
  30 char *tmpdirname;
  31
  32 #define TEST_FUNCTION do_test ()
  33 #define PREPARE(argc, argv) do_prepare ()
  34 #include "../test-skeleton.c"
  35
  36 static int
  37 do_test (void)
  38 {
  39   mtrace ();
  40
  41   const char *path = getenv ("PATH");
  42   if (path == NULL)
  43     path = "/bin";
  44   char pathbuf[strlen (tmpdirname) + 1 + strlen (path) + 1];
  45   strcpy (stpcpy (stpcpy (pathbuf, tmpdirname), ":"), path);
  46   if (setenv ("PATH", pathbuf, 1) < 0)
  47     {
  48       puts ("setenv failed");
  49       return 1;
  50     }
  51
  52   size_t i;
  53   char *argv[3] = { (char *) "script1.sh", (char *) "1", NULL };
  54   for (i = 0; i < 5; i++)
  55     {
  56       pid_t pid = vfork ();
  57       if (pid < 0)
  58         {
  59           printf ("vfork failed: %m\n");
  60           return 1;
  61         }
  62       else if (pid == 0)
  63         {
  64           execvp ("script1.sh", argv);
  65           _exit (errno);
  66         }
  67       int status;
  68       if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
  69         {
  70           puts ("waitpid failed");
  71           return 1;
  72         }
  73       else if (status != 0)
  74         {
  75           if (WIFEXITED (status))
  76             printf ("script1.sh failed with status %d\n",
  77                     WEXITSTATUS (status));
  78           else
  79             printf ("script1.sh kill by signal %d\n",
  80                     WTERMSIG (status));
  81           return 1;
  82         }
  83     }
  84
  85   argv[0] = (char *) "script2.sh";
  86   argv[1] = (char *) "2";
  87   for (i = 0; i < 5; i++)
  88     {
  89       pid_t pid = vfork ();
  90       if (pid < 0)
  91         {
  92           printf ("vfork failed: %m\n");
  93           return 1;
  94         }
  95       else if (pid == 0)
  96         {
  97           execvp ("script2.sh", argv);
  98           _exit (errno);
  99         }
 100       int status;
 101       if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
 102         {
 103           puts ("waitpid failed");
 104           return 1;
 105         }
 106       else if (status != 0)
 107         {
 108           printf ("script2.sh failed with status %d\n", status);
 109           return 1;
 110         }
 111     }
 112
 113   for (i = 0; i < 5; i++)
 114     {
 115       pid_t pid = vfork ();
 116       if (pid < 0)
 117         {
 118           printf ("vfork failed: %m\n");
 119           return 1;
 120         }
 121       else if (pid == 0)
 122         {
 123           execlp ("script2.sh", "script2.sh", "3", NULL);
 124           _exit (errno);
 125         }
 126       int status;
 127       if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
 128         {
 129           puts ("waitpid failed");
 130           return 1;
 131         }
 132       else if (status != 0)
 133         {
 134           printf ("script2.sh failed with status %d\n", status);
 135           return 1;
 136         }
 137     }
 138
 139   unsetenv ("PATH");
 140   argv[0] = (char *) "echo";
 141   argv[1] = (char *) "script 4";
 142   for (i = 0; i < 5; i++)
 143     {
 144       pid_t pid = vfork ();
 145       if (pid < 0)
 146         {
 147           printf ("vfork failed: %m\n");
 148           return 1;
 149         }
 150       else if (pid == 0)
 151         {
 152           execvp ("echo", argv);
 153           _exit (errno);
 154         }
 155       int status;
 156       if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
 157         {
 158           puts ("waitpid failed");
 159           return 1;
 160         }
 161       else if (status != 0)
 162         {
 163           printf ("echo failed with status %d\n", status);
 164           return 1;
 165         }
 166     }
 167
 168   return 0;
 169 }
 170
 171 static void
 172 do_prepare (void)
 173 {
 174   size_t len = strlen (test_dir) + sizeof ("/tst-vfork3.XXXXXX");
 175   tmpdirname = malloc (len);
 176   char *script1 = malloc (len + sizeof "/script1.sh");
 177   char *script2 = malloc (len + sizeof "/script2.sh");
 178   if (tmpdirname == NULL || script1 == NULL || script2 == NULL)
 179     {
 180       puts ("out of memory");
 181       exit (1);
 182     }
 183   strcpy (stpcpy (tmpdirname, test_dir), "/tst-vfork3.XXXXXX");
 184
 185   tmpdirname = mkdtemp (tmpdirname);
 186   if (tmpdirname == NULL)
 187     {
 188       puts ("could not create temporary directory");
 189       exit (1);
 190     }
 191
 192   strcpy (stpcpy (script1, tmpdirname), "/script1.sh");
 193   strcpy (stpcpy (script2, tmpdirname), "/script2.sh");
 194
 195   /* Need to make sure tmpdirname is at the end of the linked list.  */
 196   add_temp_file (script1);
 197   add_temp_file (tmpdirname);
 198   add_temp_file (script2);
 199
 200   const char content1[] = "#!/bin/sh\necho script $1\n";
 201   int fd = open (script1, O_WRONLY | O_CREAT, 0700);
 202   if (fd < 0
 203       || TEMP_FAILURE_RETRY (write (fd, content1, sizeof content1))
 204          != sizeof content1
 205       || fchmod (fd, S_IRUSR | S_IXUSR) < 0)
 206     {
 207       printf ("Could not write %s\n", script1);
 208       exit (1);
 209     }
 210   close (fd);
 211
 212   const char content2[] = "echo script $1\n";
 213   fd = open (script2, O_WRONLY | O_CREAT, 0700);
 214   if (fd < 0
 215       || TEMP_FAILURE_RETRY (write (fd, content2, sizeof content2))
 216          != sizeof content2
 217       || fchmod (fd, S_IRUSR | S_IXUSR) < 0)
 218     {
 219       printf ("Could not write %s\n", script2);
 220       exit (1);
 221     }
 222   close (fd);
 223 }