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/* Test guestmount --fd option.
* Copyright (C) 2014 Red Hat 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "ignore-value.h"
#include "guestfs.h"
#include "guestfs-internal-frontend.h"
#define GUESTMOUNT_BINARY "./guestmount"
#define GUESTUNMOUNT_BINARY "./guestunmount"
#define TEST_IMAGE "../tests/guests/fedora.img"
#define MOUNTPOINT "test-guestmount-fd.d"
#define TEST_FILE MOUNTPOINT "/etc/fstab"
int
main (int argc, char *argv[])
{
char *skip;
int pipefd[2];
pid_t pid;
char c;
int r, status;
/* Allow the test to be skipped. */
skip = getenv ("SKIP_TEST_GUESTMOUNT_FD");
if (skip && STREQ (skip, "1")) {
fprintf (stderr, "%s: test skipped because environment variable set.\n",
program_name);
exit (77);
}
/* Skip the test if the test image can't be found. */
if (access (TEST_IMAGE, R_OK) == -1) {
perror (TEST_IMAGE);
exit (77);
}
/* Skip the test if /dev/fuse is not writable, because guestmount
* will fail.
*/
if (access ("/dev/fuse", W_OK) == -1) {
perror ("/dev/fuse");
exit (77);
}
/* Create the pipe. */
if (pipe (pipefd) == -1) {
perror ("pipe");
exit (EXIT_FAILURE);
}
/* Create the mount point. */
ignore_value (rmdir (MOUNTPOINT));
if (mkdir (MOUNTPOINT, 0700) == -1) {
perror ("mkdir: " MOUNTPOINT);
exit (EXIT_FAILURE);
}
/* Create the guestmount subprocess. */
pid = fork ();
if (pid == -1) {
perror ("fork");
exit (EXIT_FAILURE);
}
if (pid == 0) { /* child - guestmount */
char fd_str[64];
close (pipefd[0]);
snprintf (fd_str, sizeof fd_str, "%d", pipefd[1]);
execlp (GUESTMOUNT_BINARY,
"guestmount",
"--fd", fd_str, "--no-fork",
"--ro", "-a", TEST_IMAGE, "-i", MOUNTPOINT, NULL);
perror ("execlp");
_exit (EXIT_FAILURE);
}
/* Parent continues. */
close (pipefd[1]);
/* Wait for guestmount to start up. */
r = read (pipefd[0], &c, 1);
if (r == -1) {
perror ("read (pipefd)");
ignore_value (rmdir (MOUNTPOINT));
exit (EXIT_FAILURE);
}
if (r == 0) {
fprintf (stderr, "%s: unexpected end of file on pipe fd.\n",
program_name);
ignore_value (rmdir (MOUNTPOINT));
exit (EXIT_FAILURE);
}
/* Check that the test image was mounted. */
if (access (TEST_FILE, R_OK) == -1) {
fprintf (stderr, "%s: test failed because test image is not mounted and ready.",
program_name);
ignore_value (rmdir (MOUNTPOINT));
exit (EXIT_FAILURE);
}
/* Unmount it. */
r = system (GUESTUNMOUNT_BINARY " " MOUNTPOINT);
if (r != 0) {
char status_string[80];
fprintf (stderr, "%s: test failed: %s\n", program_name,
guestfs___exit_status_to_string (r, GUESTUNMOUNT_BINARY,
status_string,
sizeof status_string));
ignore_value (rmdir (MOUNTPOINT));
exit (EXIT_FAILURE);
}
close (pipefd[0]);
/* Wait for guestmount to exit, and check it exits cleanly. */
r = waitpid (pid, &status, 0);
if (r == -1) {
perror ("waitpid");
ignore_value (rmdir (MOUNTPOINT));
exit (EXIT_FAILURE);
}
if (!WIFEXITED (status) || WEXITSTATUS (status) != 0) {
char status_string[80];
fprintf (stderr, "%s: test failed: %s\n",
program_name,
guestfs___exit_status_to_string (status, GUESTMOUNT_BINARY,
status_string,
sizeof status_string));
ignore_value (rmdir (MOUNTPOINT));
exit (EXIT_FAILURE);
}
ignore_value (rmdir (MOUNTPOINT));
exit (EXIT_SUCCESS);
}
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