sysdeps/pthread/tst-exec1.c

   1 /* Simple exec test, only a thread in the parent.
   2    Copyright (C) 2002-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <paths.h>
  21 #include <pthread.h>
  22 #include <signal.h>
  23 #include <spawn.h>
  24 #include <stdbool.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28 #include <sys/wait.h>
  29 #include <support/xsignal.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   xsignal (SIGPIPE, SIG_IGN);
  60
  61   posix_spawn_file_actions_t a;
  62   if (posix_spawn_file_actions_init (&a) != 0)
  63     {
  64       puts ("spawn_file_actions_init failed");
  65       exit (1);
  66     }
  67
  68   if (posix_spawn_file_actions_adddup2 (&a, fd[1], STDOUT_FILENO) != 0)
  69     {
  70       puts ("spawn_file_actions_adddup2 failed");
  71       exit (1);
  72     }
  73
  74   if (posix_spawn_file_actions_addclose (&a, fd[0]) != 0)
  75     {
  76       puts ("spawn_file_actions_addclose");
  77       exit (1);
  78     }
  79
  80   pthread_t th;
  81   if (pthread_create (&th, NULL, tf, (void *) pthread_self ()) != 0)
  82     {
  83       puts ("create failed");
  84       exit (1);
  85     }
  86
  87   pid_t pid;
  88   char *argv[] = { (char *) _PATH_BSHELL, (char *) "-c", (char *) "echo $$",
  89                    NULL };
  90   if (posix_spawn (&pid, _PATH_BSHELL, &a, NULL, argv, NULL) != 0)
  91     {
  92       puts ("spawn failed");
  93       exit (1);
  94     }
  95
  96   close (fd[1]);
  97
  98   char buf[200];
  99   ssize_t n;
 100   bool seen_pid = false;
 101   while (TEMP_FAILURE_RETRY ((n = read (fd[0], buf, sizeof (buf)))) > 0)
 102     {
 103       /* We only expect to read the PID.  */
 104       char *endp;
 105       long int rpid = strtol (buf, &endp, 10);
 106
 107       if (*endp != '\n')
 108         {
 109           printf ("didn't parse whole line: \"%s\"\n", buf);
 110           exit (1);
 111         }
 112       if (endp == buf)
 113         {
 114           puts ("read empty line");
 115           exit (1);
 116         }
 117
 118       if (rpid != pid)
 119         {
 120           printf ("found \"%s\", expected PID %ld\n", buf, (long int) pid);
 121           exit (1);
 122         }
 123
 124       if (seen_pid)
 125         {
 126           puts ("found more than one PID line");
 127           exit (1);
 128         }
 129
 130       seen_pid = true;
 131     }
 132
 133   close (fd[0]);
 134
 135   int status;
 136   int err = waitpid (pid, &status, 0);
 137   if (err != pid)
 138     {
 139       puts ("waitpid failed");
 140       exit (1);
 141     }
 142
 143   if (!seen_pid)
 144     {
 145       puts ("didn't get PID");
 146       exit (1);
 147     }
 148
 149   puts ("read correct PID");
 150
 151   return 0;
 152 }
 153
 154 #define TEST_FUNCTION do_test ()
 155 #include "../test-skeleton.c"