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/*
* Copyright Scott Balneaves, sbalneav@ltsp.org, 2007, 2008
* Vagrant Cascadian, vagrant@freegeek.org, 2008
* Gideon Romm, gadi@ltsp.org, 2009
* 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, you can find it on the World Wide
* Web at http://www.gnu.org/copyleft/gpl.html, or write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <linux/cdrom.h>
#include <glib.h>
#include <syslog.h>
#define POLL_INTERVAL 3 /* Check cdrom every 3 secs */
/*
* enum for our mount states
*/
typedef enum {
CDP_CDROM_MOUNT,
CDP_CDROM_UMOUNT
} CdpMountType;
char *device;
/*
* check_cd_status: Switch mounted and unmounted states in the cdrom, and
* call out our shell scripts to handle the actual work of plumbing the
* ltspfs connection.
*/
gboolean
check_cd_status(void)
{
char dev[BUFSIZ], cmd[BUFSIZ];
int cdrom, status;
static CdpMountType last = CDP_CDROM_UMOUNT;
snprintf(dev, sizeof dev, "/dev/%s", device);
/*
* Try to open the cdrom device. It might not exist, for a usb cdrom,
* so simply return false so we exit. Device has been unplugged.
* Make sure it's unmounted, and exit.
*/
if ((cdrom = open(dev, O_RDONLY|O_NONBLOCK)) < 0) {
syslog (LOG_ERR, "Device %s disappeared. Exiting.", device);
if (last == CDP_CDROM_MOUNT) {
snprintf(cmd, sizeof cmd,
"/lib/udev/ltspfs_entry remove_disc %s", device);
g_spawn_command_line_sync(cmd, NULL, NULL, NULL, NULL);
}
return FALSE;
}
/*
* Talk to the cdrom, get the status, and close it.
*/
ioctl(cdrom, CDROM_LOCKDOOR, 0);
status = ioctl (cdrom, CDROM_DRIVE_STATUS, 0);
close(cdrom);
/*
* Something badly wrong with the cdrom. Don't bother talking to it
* anymore.
*/
if (status < 0) {
syslog (LOG_ERR, "ioctl(CDROM_DRIVE_STATUS) failed. Exiting.");
snprintf(cmd, sizeof cmd,
"/lib/udev/ltspfs_entry remove_disc %s", device);
return g_spawn_command_line_sync(cmd, NULL, NULL, NULL, NULL);
return FALSE;
}
/*
* Look at cdrom, see if we've got a disk or not, and mount or umount
* appropriately
*/
switch(status) {
case CDS_NO_DISC:
case CDS_TRAY_OPEN:
if (last == CDP_CDROM_MOUNT) {
syslog (LOG_INFO, "Tray open. Unmounting");
snprintf(cmd, sizeof cmd,
"/lib/udev/ltspfs_entry remove_disc %s", device);
last = CDP_CDROM_UMOUNT;
return g_spawn_command_line_sync(cmd, NULL, NULL, NULL, NULL);
}
break;
case CDS_DISC_OK:
if (last == CDP_CDROM_UMOUNT) {
syslog (LOG_INFO, "Disk detected. Mounting");
snprintf(cmd, sizeof cmd,
"/lib/udev/ltspfs_entry add_disc %s iso9660,udf", device);
last = CDP_CDROM_MOUNT;
return g_spawn_command_line_sync(cmd, NULL, NULL, NULL, NULL);
}
break;
}
return TRUE;
}
/*
* end_cd_watch: Callback routine error routine for the timeout. If
* check_cd_status has returned false, somthing's happened, like, say
* the USB cdrom being unplugged, so just exit the main loop.
*/
void
end_cd_watch(gpointer loop)
{
g_main_loop_quit((GMainLoop *)loop);
}
int
main(int argc, char *argv[])
{
GMainLoop *loop;
if (argc != 2)
exit(1);
openlog (argv[0], LOG_PID | LOG_NOWAIT, LOG_DAEMON);
g_type_init();
device = argv[1];
if (daemon(0,0))
exit(1);
syslog (LOG_INFO, "starting, device = %s", argv[1]);
loop = g_main_loop_new (NULL, FALSE);
/* Add a timeout */
g_timeout_add_full(G_PRIORITY_DEFAULT, POLL_INTERVAL * 1000,
(GSourceFunc)check_cd_status, NULL,
(GDestroyNotify)end_cd_watch);
g_main_loop_run(loop);
closelog ();
return 0;
}
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