nptl/tst-exec1.c

   1 /* Simple exec test, only a thread in the parent.
   2    Copyright (C) 2002-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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 <paths.h>
  22 #include <pthread.h>
  23 #include <signal.h>
  24 #include <spawn.h>
  25 #include <stdbool.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <unistd.h>
  29 #include <sys/wait.h>
  30
  31
  32 static void *
  33 tf (void *arg)
  34 {
  35   pthread_t th = (pthread_t) arg;
  36
  37   if (pthread_join (th, NULL) == 0)
  38     {
  39       puts ("thread in parent joined!?");
  40       exit (1);
  41     }
  42
  43   puts ("join in thread in parent returned!?");
  44   exit (1);
  45 }
  46
  47
  48 static int
  49 do_test (void)
  50 {
  51   int fd[2];
  52   if (pipe (fd) != 0)
  53     {
  54       puts ("pipe failed");
  55       exit (1);
  56     }
  57
  58   /* Not interested in knowing when the pipe is closed.  */
  59   if (sigignore (SIGPIPE) != 0)
  60     {
  61       puts ("sigignore failed");
  62       exit (1);
  63     }
  64
  65   posix_spawn_file_actions_t a;
  66   if (posix_spawn_file_actions_init (&a) != 0)
  67     {
  68       puts ("spawn_file_actions_init failed");
  69       exit (1);
  70     }
  71
  72   if (posix_spawn_file_actions_adddup2 (&a, fd[1], STDOUT_FILENO) != 0)
  73     {
  74       puts ("spawn_file_actions_adddup2 failed");
  75       exit (1);
  76     }
  77
  78   if (posix_spawn_file_actions_addclose (&a, fd[0]) != 0)
  79     {
  80       puts ("spawn_file_actions_addclose");
  81       exit (1);
  82     }
  83
  84   pthread_t th;
  85   if (pthread_create (&th, NULL, tf, (void *) pthread_self ()) != 0)
  86     {
  87       puts ("create failed");
  88       exit (1);
  89     }
  90
  91   pid_t pid;
  92   char *argv[] = { (char *) _PATH_BSHELL, (char *) "-c", (char *) "echo $$",
  93                    NULL };
  94   if (posix_spawn (&pid, _PATH_BSHELL, &a, NULL, argv, NULL) != 0)
  95     {
  96       puts ("spawn failed");
  97       exit (1);
  98     }
  99
 100   close (fd[1]);
 101
 102   char buf[200];
 103   ssize_t n;
 104   bool seen_pid = false;
 105   while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0)
 106     {
 107       /* We only expect to read the PID.  */
 108       char *endp;
 109       long int rpid = strtol (buf, &endp, 10);
 110
 111       if (*endp != '\n')
 112         {
 113           printf ("didn't parse whole line: \"%s\"\n", buf);
 114           exit (1);
 115         }
 116       if (endp == buf)
 117         {
 118           puts ("read empty line");
 119           exit (1);
 120         }
 121
 122       if (rpid != pid)
 123         {
 124           printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid);
 125           exit (1);
 126         }
 127
 128       if (seen_pid)
 129         {
 130           puts ("found more than one PID line");
 131           exit (1);
 132         }
 133
 134       seen_pid = true;
 135     }
 136
 137   close (fd[0]);
 138
 139   int status;
 140   int err = waitpid (pid, &status, 0);
 141   if (err != pid)
 142     {
 143       puts ("waitpid failed");
 144       exit (1);
 145     }
 146
 147   if (!seen_pid)
 148     {
 149       puts ("didn't get PID");
 150       exit (1);
 151     }
 152
 153   puts ("read correct PID");
 154
 155   return 0;
 156 }
 157
 158 #define TEST_FUNCTION do_test ()
 159 #include "../test-skeleton.c"