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Sourcecode: ecryptfs-utils version File versions

main.c

/**
 * Userspace daemon which responds to the eCryptfs kernel module's requests
 *
 * Copyright (C) 2004-2006 International Business Machines Corp.
 *   Author(s): Tyler Hicks <tyhicks@ou.edu>
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <string.h>
#include "../include/ecryptfs.h"

static int ecryptfs_socket = 0;

static void ecryptfsd_exit(int retval)
{
      if (!ecryptfs_socket)
            goto out;
      if (ecryptfs_send_netlink(ecryptfs_socket, NULL,
                          ECRYPTFS_NLMSG_QUIT, 0, 0) < 0) {
            ecryptfs_syslog(LOG_ERR, "Failed to unregister netlink "
                        "daemon with the eCryptfs kernel module\n");
      }
      ecryptfs_release_netlink(ecryptfs_socket);
out:
      ecryptfs_syslog(LOG_INFO, "Closing eCryptfs userspace netlink "
                  "daemon [%u]\n", getpid());
      exit(retval);
}

void sigterm_handler(int sig)
{
      ecryptfsd_exit(0);
}

int main(int argc, char **argv)
{
      pid_t daemon_pid;
      int rc = 0;

      daemon_pid = fork();
      if (daemon_pid < 0) {
            rc = -errno;
            printf("Failed to create daemon process: %s\n", strerror(errno));
      } else if (!daemon_pid) {
            if (signal(SIGTERM, sigterm_handler)) {
                  rc = -ENOTSUP;
                  printf("Failed to attach handler to SIGTERM\n");
                  goto daemon_out;
            }
            rc = init_netlink_daemon();
            if (rc) {
                  syslog(LOG_ERR, "Error initializing netlink daemon; rc = [%d]\n", rc);
                  goto daemon_out;
            }
            rc = ecryptfs_init_netlink(&ecryptfs_socket);
            if (rc) {
                  syslog(LOG_ERR, "Failed to run netlink daemon\n");
                  goto daemon_out;
            }
            rc = ecryptfs_send_netlink(ecryptfs_socket, NULL,
                                 ECRYPTFS_NLMSG_HELO, 0, 0);
            if (rc < 0) {
                  syslog(LOG_ERR, "Failed to register netlink daemon with the eCryptfs kernel module\n");
                  goto daemon_out;
            }
            rc = ecryptfs_run_netlink_daemon(ecryptfs_socket);
daemon_out:
            ecryptfsd_exit(rc);
      }
      return rc;
}

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