kc3-lang/gnulib/tests/test-posix_spawn5.c

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• Hash : 5ec4d920
  Author :
  Date : 2020-04-28T12:35:19
  

  posix_spawn_file_actions_addfchdir tests: Enhance test.
  
  * tests/test-posix_spawn5.c: Include findprog.h.
  (test): New function, extracted from main.
  (main): Invoke it. Also, invoke it with a program name such as
  "bin/pwd".
  * modules/posix_spawn_file_actions_addfchdir-tests (Depends-on): Add
  findprog.
  

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• tests/test-posix_spawn5.c

• /* Test of posix_spawn() function with 'fchdir' action.
     Copyright (C) 2008-2020 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Bruno Haible <bruno@clisp.org>, 2018.  */
  
  #include <config.h>
  
  #include <spawn.h>
  
  #include <errno.h>
  #include <fcntl.h>
  #include <signal.h>
  #include <stdbool.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  #include <sys/types.h>
  #include <sys/wait.h>
  
  #include "findprog.h"
  
  static int
  fd_safer (int fd)
  {
    if (0 <= fd && fd <= 2)
      {
        int f = fd_safer (dup (fd));
        int e = errno;
        close (fd);
        errno = e;
        fd = f;
      }
  
    return fd;
  }
  
  static void
  test (const char *pwd_prog)
  {
    char *argv[2] = { (char *) "pwd", NULL };
    int rootfd;
    int ifd[2];
    sigset_t blocked_signals;
    sigset_t fatal_signal_set;
    posix_spawn_file_actions_t actions;
    bool actions_allocated;
    posix_spawnattr_t attrs;
    bool attrs_allocated;
    int err;
    pid_t child;
    int fd;
    FILE *fp;
    char line[80];
    int status;
    int exitstatus;
  
    rootfd = open ("/", O_RDONLY);
    if (rootfd < 0)
      {
        perror ("cannot open directory");
        exit (1);
      }
    if (pipe (ifd) < 0 || (ifd[0] = fd_safer (ifd[0])) < 0)
      {
        perror ("cannot create pipe");
        exit (1);
      }
    sigprocmask (SIG_SETMASK, NULL, &blocked_signals);
    sigemptyset (&fatal_signal_set);
    sigaddset (&fatal_signal_set, SIGINT);
    sigaddset (&fatal_signal_set, SIGTERM);
    sigaddset (&fatal_signal_set, SIGHUP);
    sigaddset (&fatal_signal_set, SIGPIPE);
    sigprocmask (SIG_BLOCK, &fatal_signal_set, NULL);
    actions_allocated = false;
    attrs_allocated = false;
    if ((err = posix_spawn_file_actions_init (&actions)) != 0
        || (actions_allocated = true,
            (err = posix_spawn_file_actions_adddup2 (&actions, ifd[1], STDOUT_FILENO)) != 0
            || (err = posix_spawn_file_actions_addclose (&actions, ifd[1])) != 0
            || (err = posix_spawn_file_actions_addclose (&actions, ifd[0])) != 0
            || (err = posix_spawn_file_actions_addopen (&actions, STDIN_FILENO, "/dev/null", O_RDONLY, 0)) != 0
            || (err = posix_spawn_file_actions_addfchdir (&actions, rootfd)) != 0
            || (err = posix_spawnattr_init (&attrs)) != 0
            || (attrs_allocated = true,
                (err = posix_spawnattr_setsigmask (&attrs, &blocked_signals)) != 0
                || (err = posix_spawnattr_setflags (&attrs, POSIX_SPAWN_SETSIGMASK)) != 0)
            || (err = posix_spawnp (&child, pwd_prog, &actions, &attrs, argv, environ)) != 0))
      {
        if (actions_allocated)
          posix_spawn_file_actions_destroy (&actions);
        if (attrs_allocated)
          posix_spawnattr_destroy (&attrs);
        sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
        errno = err;
        perror ("subprocess failed");
        exit (1);
      }
    posix_spawn_file_actions_destroy (&actions);
    posix_spawnattr_destroy (&attrs);
    sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
    close (ifd[1]);
    fd = ifd[0];
    fp = fdopen (fd, "r");
    if (fp == NULL)
      {
        fprintf (stderr, "fdopen() failed\n");
        exit (1);
      }
    if (fread (line, 1, 80, fp) < 2)
      {
        fprintf (stderr, "could not read expected output\n");
        exit (1);
      }
    if (memcmp (line, "/\n", 2) != 0)
      {
        fprintf (stderr, "read output is not the expected output");
        exit (1);
      }
    fclose (fp);
    status = 0;
    while (waitpid (child, &status, 0) != child)
      ;
    if (!WIFEXITED (status))
      {
        fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
        exit (1);
      }
    exitstatus = WEXITSTATUS (status);
    if (exitstatus != 0)
      {
        fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
        exit (1);
      }
  }
  
  int
  main ()
  {
    test ("pwd");
  
    /* Verify that if a program is given as a relative file name with at least one
       slash, it is interpreted w.r.t. the current directory after fchdir has been
       executed.  */
    {
      const char *abs_pwd_prog = find_in_path ("pwd");
  
      if (abs_pwd_prog != NULL
          && abs_pwd_prog[0] == '/'
          && abs_pwd_prog[1] != '0' && abs_pwd_prog[1] != '/')
        test (&abs_pwd_prog[1]);
    }
  
    return 0;
  }
  

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