262 lines
8.7 KiB
C
262 lines
8.7 KiB
C
/* Tests for spawn.
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Copyright (C) 2000-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <error.h>
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#include <fcntl.h>
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#include <spawn.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <wait.h>
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#include <sys/param.h>
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/* Nonzero if the program gets called via `exec'. */
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static int restart;
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#define CMDLINE_OPTIONS \
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{ "restart", no_argument, &restart, 1 },
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/* Prototype for our test function. */
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extern void do_prepare (int argc, char *argv[]);
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extern int do_test (int argc, char *argv[]);
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/* We have a preparation function. */
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#define PREPARE do_prepare
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#include "../test-skeleton.c"
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/* Name of the temporary files. */
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static char *name1;
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static char *name2;
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static char *name3;
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/* Descriptors for the temporary files. */
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static int temp_fd1 = -1;
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static int temp_fd2 = -1;
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static int temp_fd3 = -1;
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/* The contents of our files. */
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static const char fd1string[] = "This file should get closed";
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static const char fd2string[] = "This file should stay opened";
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static const char fd3string[] = "This file will be opened";
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/* We have a preparation function. */
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void
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do_prepare (int argc, char *argv[])
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{
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/* We must not open any files in the restart case. */
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if (restart)
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return;
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temp_fd1 = create_temp_file ("spawn", &name1);
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temp_fd2 = create_temp_file ("spawn", &name2);
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temp_fd3 = create_temp_file ("spawn", &name3);
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if (temp_fd1 < 0 || temp_fd2 < 0 || temp_fd3 < 0)
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exit (1);
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}
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static int
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handle_restart (const char *fd1s, const char *fd2s, const char *fd3s,
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const char *fd4s, const char *name)
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{
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char buf[100];
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int fd1;
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int fd2;
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int fd3;
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int fd4;
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/* First get the descriptors. */
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fd1 = atol (fd1s);
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fd2 = atol (fd2s);
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fd3 = atol (fd3s);
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fd4 = atol (fd4s);
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/* Sanity check. */
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if (fd1 == fd2)
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error (EXIT_FAILURE, 0, "value of fd1 and fd2 is the same");
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if (fd1 == fd3)
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error (EXIT_FAILURE, 0, "value of fd1 and fd3 is the same");
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if (fd1 == fd4)
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error (EXIT_FAILURE, 0, "value of fd1 and fd4 is the same");
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if (fd2 == fd3)
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error (EXIT_FAILURE, 0, "value of fd2 and fd3 is the same");
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if (fd2 == fd4)
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error (EXIT_FAILURE, 0, "value of fd2 and fd4 is the same");
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if (fd3 == fd4)
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error (EXIT_FAILURE, 0, "value of fd3 and fd4 is the same");
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/* First the easy part: read from the file descriptor which is
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supposed to be open. */
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if (lseek (fd2, 0, SEEK_CUR) != strlen (fd2string))
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error (EXIT_FAILURE, errno, "file 2 not in right position");
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/* The duped descriptor must have the same position. */
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if (lseek (fd4, 0, SEEK_CUR) != strlen (fd2string))
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error (EXIT_FAILURE, errno, "file 4 not in right position");
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if (lseek (fd2, 0, SEEK_SET) != 0)
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error (EXIT_FAILURE, 0, "cannot reset position in file 2");
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if (lseek (fd4, 0, SEEK_CUR) != 0)
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error (EXIT_FAILURE, errno, "file 4 not set back, too");
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if (read (fd2, buf, sizeof buf) != strlen (fd2string))
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error (EXIT_FAILURE, 0, "cannot read file 2");
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if (memcmp (fd2string, buf, strlen (fd2string)) != 0)
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error (EXIT_FAILURE, 0, "file 2 does not match");
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/* Now read from the third file. */
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if (read (fd3, buf, sizeof buf) != strlen (fd3string))
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error (EXIT_FAILURE, 0, "cannot read file 3");
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if (memcmp (fd3string, buf, strlen (fd3string)) != 0)
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error (EXIT_FAILURE, 0, "file 3 does not match");
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/* Try to write to the file. This should not be allowed. */
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if (write (fd3, "boo!", 4) != -1 || errno != EBADF)
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error (EXIT_FAILURE, 0, "file 3 is writable");
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/* Now try to read the first file. First make sure it is not opened. */
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if (lseek (fd1, 0, SEEK_CUR) != (off_t) -1 || errno != EBADF)
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error (EXIT_FAILURE, 0, "file 1 (%d) is not closed", fd1);
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/* Now open the file and read it. */
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fd1 = open (name, O_RDONLY);
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if (fd1 == -1)
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error (EXIT_FAILURE, errno,
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"cannot open first file \"%s\" for verification", name);
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if (read (fd1, buf, sizeof buf) != strlen (fd1string))
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error (EXIT_FAILURE, errno, "cannot read file 1");
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if (memcmp (fd1string, buf, strlen (fd1string)) != 0)
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error (EXIT_FAILURE, 0, "file 1 does not match");
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return 0;
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}
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int
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do_test (int argc, char *argv[])
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{
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pid_t pid;
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int fd4;
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int status;
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posix_spawn_file_actions_t actions;
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char fd1name[18];
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char fd2name[18];
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char fd3name[18];
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char fd4name[18];
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char *name3_copy;
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char *spargv[12];
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int i;
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/* We must have
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- one or four parameters left if called initially
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+ path for ld.so optional
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+ "--library-path" optional
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+ the library path optional
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+ the application name
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- five parameters left if called through re-execution
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+ file descriptor number which is supposed to be closed
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+ the open file descriptor
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+ the newly opened file descriptor
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+ thhe duped second descriptor
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+ the name of the closed descriptor
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*/
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if (argc != (restart ? 6 : 2) && argc != (restart ? 6 : 5))
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error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc);
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if (restart)
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return handle_restart (argv[1], argv[2], argv[3], argv[4], argv[5]);
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/* Prepare the test. We are creating two files: one which file descriptor
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will be marked with FD_CLOEXEC, another which is not. */
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/* Write something in the files. */
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if (write (temp_fd1, fd1string, strlen (fd1string)) != strlen (fd1string))
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error (EXIT_FAILURE, errno, "cannot write to first file");
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if (write (temp_fd2, fd2string, strlen (fd2string)) != strlen (fd2string))
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error (EXIT_FAILURE, errno, "cannot write to second file");
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if (write (temp_fd3, fd3string, strlen (fd3string)) != strlen (fd3string))
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error (EXIT_FAILURE, errno, "cannot write to third file");
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/* Close the third file. It'll be opened by `spawn'. */
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close (temp_fd3);
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/* Tell `spawn' what to do. */
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if (posix_spawn_file_actions_init (&actions) != 0)
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error (EXIT_FAILURE, errno, "posix_spawn_file_actions_init");
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/* Close `temp_fd1'. */
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if (posix_spawn_file_actions_addclose (&actions, temp_fd1) != 0)
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error (EXIT_FAILURE, errno, "posix_spawn_file_actions_addclose");
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/* We want to open the third file. */
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name3_copy = strdup (name3);
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if (name3_copy == NULL)
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error (EXIT_FAILURE, errno, "strdup");
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if (posix_spawn_file_actions_addopen (&actions, temp_fd3, name3_copy,
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O_RDONLY, 0666) != 0)
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error (EXIT_FAILURE, errno, "posix_spawn_file_actions_addopen");
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/* Overwrite the name to check that a copy has been made. */
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memset (name3_copy, 'X', strlen (name3_copy));
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/* We dup the second descriptor. */
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fd4 = MAX (2, MAX (temp_fd1, MAX (temp_fd2, temp_fd3))) + 1;
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if (posix_spawn_file_actions_adddup2 (&actions, temp_fd2, fd4) != 0)
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error (EXIT_FAILURE, errno, "posix_spawn_file_actions_adddup2");
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/* Now spawn the process. */
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snprintf (fd1name, sizeof fd1name, "%d", temp_fd1);
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snprintf (fd2name, sizeof fd2name, "%d", temp_fd2);
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snprintf (fd3name, sizeof fd3name, "%d", temp_fd3);
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snprintf (fd4name, sizeof fd4name, "%d", fd4);
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for (i = 0; i < (argc == (restart ? 6 : 5) ? 4 : 1); i++)
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spargv[i] = argv[i + 1];
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spargv[i++] = (char *) "--direct";
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spargv[i++] = (char *) "--restart";
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spargv[i++] = fd1name;
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spargv[i++] = fd2name;
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spargv[i++] = fd3name;
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spargv[i++] = fd4name;
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spargv[i++] = name1;
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spargv[i] = NULL;
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if (posix_spawn (&pid, argv[1], &actions, NULL, spargv, environ) != 0)
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error (EXIT_FAILURE, errno, "posix_spawn");
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/* Same test but with a NULL pid argument. */
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if (posix_spawn (NULL, argv[1], &actions, NULL, spargv, environ) != 0)
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error (EXIT_FAILURE, errno, "posix_spawn");
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/* Cleanup. */
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if (posix_spawn_file_actions_destroy (&actions) != 0)
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error (EXIT_FAILURE, errno, "posix_spawn_file_actions_destroy");
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free (name3_copy);
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/* Wait for the child. */
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if (waitpid (pid, &status, 0) != pid)
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error (EXIT_FAILURE, errno, "wrong child");
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if (WTERMSIG (status) != 0)
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error (EXIT_FAILURE, 0, "Child terminated incorrectly");
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status = WEXITSTATUS (status);
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return status;
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}
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