tests/test-posix_spawn1.c

   1 /* Test of posix_spawn() function.
   2    Copyright (C) 2008-2017 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
  18
  19 #include <config.h>
  20
  21 #include <spawn.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (posix_spawnp, int, (pid_t *, char const *,
  25                                      posix_spawn_file_actions_t const *,
  26                                      posix_spawnattr_t const *,
  27                                      char *const[], char *const[]));
  28 SIGNATURE_CHECK (posix_spawnattr_init, int, (posix_spawnattr_t *));
  29 SIGNATURE_CHECK (posix_spawnattr_destroy, int, (posix_spawnattr_t *));
  30 SIGNATURE_CHECK (posix_spawnattr_setsigmask, int, (posix_spawnattr_t *,
  31                                                    sigset_t const *));
  32 SIGNATURE_CHECK (posix_spawnattr_setflags, int, (posix_spawnattr_t *, short));
  33 SIGNATURE_CHECK (posix_spawn_file_actions_init, int,
  34                  (posix_spawn_file_actions_t *));
  35 SIGNATURE_CHECK (posix_spawn_file_actions_destroy, int,
  36                  (posix_spawn_file_actions_t *));
  37 SIGNATURE_CHECK (posix_spawn_file_actions_addclose, int,
  38                  (posix_spawn_file_actions_t *, int));
  39 SIGNATURE_CHECK (posix_spawn_file_actions_addopen, int,
  40                  (posix_spawn_file_actions_t *, int, char const *, int,
  41                   mode_t));
  42 SIGNATURE_CHECK (posix_spawn_file_actions_adddup2, int,
  43                  (posix_spawn_file_actions_t *, int, int));
  44
  45 #include <errno.h>
  46 #include <fcntl.h>
  47 #include <signal.h>
  48 #include <stdbool.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <unistd.h>
  53 #include <sys/types.h>
  54 #include <sys/wait.h>
  55
  56 extern char **environ;
  57
  58 #define CHILD_PROGRAM_FILENAME "test-posix_spawn1.sh"
  59
  60 static int
  61 fd_safer (int fd)
  62 {
  63   if (0 <= fd && fd <= 2)
  64     {
  65       int f = fd_safer (dup (fd));
  66       int e = errno;
  67       close (fd);
  68       errno = e;
  69       fd = f;
  70     }
  71
  72   return fd;
  73 }
  74
  75 int
  76 main ()
  77 {
  78   char *argv[3] = { (char *) "/bin/sh", (char *) CHILD_PROGRAM_FILENAME, NULL };
  79   int ifd[2];
  80   sigset_t blocked_signals;
  81   sigset_t fatal_signal_set;
  82   posix_spawn_file_actions_t actions;
  83   bool actions_allocated;
  84   posix_spawnattr_t attrs;
  85   bool attrs_allocated;
  86   int err;
  87   pid_t child;
  88   int fd;
  89   FILE *fp;
  90   char line[80];
  91   int status;
  92   int exitstatus;
  93
  94   if (pipe (ifd) < 0 || (ifd[0] = fd_safer (ifd[0])) < 0)
  95     {
  96       perror ("cannot create pipe");
  97       exit (1);
  98     }
  99   sigprocmask (SIG_SETMASK, NULL, &blocked_signals);
 100   sigemptyset (&fatal_signal_set);
 101   sigaddset (&fatal_signal_set, SIGINT);
 102   sigaddset (&fatal_signal_set, SIGTERM);
 103   sigaddset (&fatal_signal_set, SIGHUP);
 104   sigaddset (&fatal_signal_set, SIGPIPE);
 105   sigprocmask (SIG_BLOCK, &fatal_signal_set, NULL);
 106   actions_allocated = false;
 107   attrs_allocated = false;
 108   if ((err = posix_spawn_file_actions_init (&actions)) != 0
 109       || (actions_allocated = true,
 110           (err = posix_spawn_file_actions_adddup2 (&actions, ifd[1], STDOUT_FILENO)) != 0
 111           || (err = posix_spawn_file_actions_addclose (&actions, ifd[1])) != 0
 112           || (err = posix_spawn_file_actions_addclose (&actions, ifd[0])) != 0
 113           || (err = posix_spawn_file_actions_addopen (&actions, STDIN_FILENO, "/dev/null", O_RDONLY, 0)) != 0
 114           || (err = posix_spawnattr_init (&attrs)) != 0
 115           || (attrs_allocated = true,
 116               (err = posix_spawnattr_setsigmask (&attrs, &blocked_signals)) != 0
 117               || (err = posix_spawnattr_setflags (&attrs, POSIX_SPAWN_SETSIGMASK)) != 0)
 118           || (err = posix_spawnp (&child, "/bin/sh", &actions, &attrs, argv, environ)) != 0))
 119     {
 120       if (actions_allocated)
 121         posix_spawn_file_actions_destroy (&actions);
 122       if (attrs_allocated)
 123         posix_spawnattr_destroy (&attrs);
 124       sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
 125       errno = err;
 126       perror ("subprocess failed");
 127       exit (1);
 128     }
 129   posix_spawn_file_actions_destroy (&actions);
 130   posix_spawnattr_destroy (&attrs);
 131   sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
 132   close (ifd[1]);
 133   fd = ifd[0];
 134   fp = fdopen (fd, "r");
 135   if (fp == NULL)
 136     {
 137       fprintf (stderr, "fdopen() failed\n");
 138       exit (1);
 139     }
 140   if (fread (line, 1, 80, fp) < 12)
 141     {
 142       fprintf (stderr, "could not read expected output\n");
 143       exit (1);
 144     }
 145   if (memcmp (line, "Halle Potta", 11) != 0)
 146     {
 147       fprintf (stderr, "read output is not the expected output");
 148       exit (1);
 149     }
 150   fclose (fp);
 151   status = 0;
 152   while (waitpid (child, &status, 0) != child)
 153     ;
 154   if (!WIFEXITED (status))
 155     {
 156       fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
 157       exit (1);
 158     }
 159   exitstatus = WEXITSTATUS (status);
 160   if (exitstatus != 0)
 161     {
 162       fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
 163       exit (1);
 164     }
 165   return 0;
 166 }