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/*
* (C) 2011-2013 by Christian Hesse <mail@eworm.de>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <libnotify/notify.h>
#include <libudev.h>
#define PROGNAME "udev-block-notify"
#define NOTIFICATION_TIMEOUT 10000
#ifndef DEBUG
#define DEBUG 0
#endif
#define ICON_ADD "media-removable"
#define ICON_REMOVE "media-removable"
#define ICON_MOVE "media-removable"
#define ICON_CHANGE "media-removable"
#define ICON_DEFAULT "media-removable"
#define TEXT_TOPIC "Udev Block Notification"
#define TEXT_ADD "Device <b>%s</b> (%i:%i) <b>appeared</b>."
#define TEXT_REMOVE "Device <b>%s</b> (%i:%i) <b>disappeared</b>."
#define TEXT_MOVE "Device <b>%s</b> (%i:%i) was <b>renamed</b>."
#define TEXT_CHANGE "Device <b>%s</b> (%i:%i) media <b>changed</b>."
#define TEXT_DEFAULT "Anything happend to <b>%s</b> (%i:%i)... Don't know."
#define TEXT_TAG "\n%s: <i>%s</i>"
struct notifications {
dev_t devnum;
NotifyNotification *notification;
struct notifications *next;
};
/*** get_notification ***/
NotifyNotification * get_notification(struct notifications *notifications, dev_t devnum) {
while (notifications->next != NULL) {
if (notifications->next->devnum == devnum)
return notifications->next->notification;
notifications = notifications->next;
}
/* did not find the notification, creating a new struct element */
notifications->next = malloc(sizeof(struct notifications));
notifications = notifications->next;
notifications->devnum = devnum;
notifications->notification = notify_notification_new("", "", "");
notifications->next = NULL;
notify_notification_set_category(notifications->notification, PROGNAME);
notify_notification_set_urgency (notifications->notification, NOTIFY_URGENCY_NORMAL);
return notifications->notification;
}
/*** newstr ***/
char * newstr(char *text, char *device, unsigned short int major, unsigned short int minor) {
char *notifystr;
notifystr = malloc(strlen(text) + strlen(device) + 10 /* max string length 2* unsigned short int */);
sprintf(notifystr, text, device, major, minor);
return notifystr;
}
/*** appendstr ***/
char * appendstr(char *text, char *notifystr, char *property, const char *value) {
notifystr = realloc(notifystr, strlen(text) + strlen(notifystr) + strlen(property) + strlen(value));
sprintf(notifystr + strlen(notifystr), text, property, value);
return notifystr;
}
/* main */
int main (int argc, char ** argv) {
char action;
char *device = NULL, *icon = NULL, *notifystr = NULL;
const char *value = NULL;
fd_set readfds;
GError *error = NULL;
NotifyNotification *notification = NULL;
struct notifications *notifications = NULL;
int errcount = 0;
dev_t devnum = 0;
unsigned int major = 0, minor = 0;
struct udev_device *dev = NULL;
struct udev_monitor *mon = NULL;
struct udev *udev = NULL;
printf("%s: %s v%s (compiled: " __DATE__ ", " __TIME__
#if DEBUG
", with debug output"
#endif
")\n", argv[0], PROGNAME, VERSION);
if(!notify_init("Udev-Block-Notification")) {
fprintf(stderr, "%s: Can't create notify.\n", argv[0]);
exit(EXIT_FAILURE);
}
udev = udev_new();
if(!udev) {
fprintf(stderr, "%s: Can't create udev.\n", argv[0]);
exit(EXIT_FAILURE);
}
mon = udev_monitor_new_from_netlink(udev, "udev");
udev_monitor_filter_add_match_subsystem_devtype(mon, "block", NULL);
udev_monitor_enable_receiving(mon);
notifications = malloc(sizeof(struct notifications));
notifications->devnum = 0;
notifications->notification = NULL;
notifications->next = NULL;
while (1) {
FD_ZERO(&readfds);
if (mon != NULL)
FD_SET(udev_monitor_get_fd(mon), &readfds);
select(udev_monitor_get_fd(mon) + 1, &readfds, NULL, NULL, NULL);
if ((mon != NULL) && FD_ISSET(udev_monitor_get_fd(mon), &readfds)) {
dev = udev_monitor_receive_device(mon);
if(dev) {
device = (char *) udev_device_get_sysname(dev);
devnum = udev_device_get_devnum(dev);
major = major(devnum);
minor = minor(devnum);
#if DEBUG
printf("%s: Processing device %d:%d\n", argv[0], major, minor);
#endif
action = udev_device_get_action(dev)[0];
switch(action) {
case 'a':
// a: add
notifystr = newstr(TEXT_ADD, device, major, minor);
icon = ICON_ADD;
break;
case 'r':
// r: remove
notifystr = newstr(TEXT_REMOVE, device, major, minor);
icon = ICON_REMOVE;
break;
case 'm':
// m: move
notifystr = newstr(TEXT_MOVE, device, major, minor);
icon = ICON_MOVE;
break;
case 'c':
// c: change
notifystr = newstr(TEXT_CHANGE, device, major, minor);
icon = ICON_CHANGE;
break;
default:
// we should never get here I think...
notifystr = newstr(TEXT_DEFAULT, device, major, minor);
icon = ICON_DEFAULT;
}
if (action != 'r') {
if ((value = udev_device_get_property_value(dev, "ID_FS_LABEL")) != NULL)
notifystr = appendstr(TEXT_TAG, notifystr, "Label", value);
if ((value = udev_device_get_property_value(dev, "ID_FS_TYPE")) != NULL)
notifystr = appendstr(TEXT_TAG, notifystr, "Type", value);
if ((value = udev_device_get_property_value(dev, "ID_FS_USAGE")) != NULL)
notifystr = appendstr(TEXT_TAG, notifystr, "Usage", value);
if ((value = udev_device_get_property_value(dev, "ID_FS_UUID")) != NULL)
notifystr = appendstr(TEXT_TAG, notifystr, "UUID", value);
if ((value = udev_device_get_property_value(dev, "ID_PART_TABLE_TYPE")) != NULL)
notifystr = appendstr(TEXT_TAG, notifystr, "Partition Table Type", value);
if ((value = udev_device_get_property_value(dev, "ID_PART_TABLE_NAME")) != NULL)
notifystr = appendstr(TEXT_TAG, notifystr, "Partition Name", value);
if ((value = udev_device_get_property_value(dev, "ID_PART_ENTRY_TYPE")) != NULL)
notifystr = appendstr(TEXT_TAG, notifystr, "Partition Type", value);
}
#if DEBUG
printf("%s: %s\n", argv[0], notifystr);
#endif
/* get a notification */
notification = get_notification(notifications, devnum);
notify_notification_update(notification, TEXT_TOPIC, notifystr, icon);
notify_notification_set_timeout(notification, NOTIFICATION_TIMEOUT);
while(!notify_notification_show(notification, &error)) {
if (errcount > 1) {
fprintf(stderr, "%s: Looks like we can not reconnect to notification daemon... Exiting.\n", argv[0]);
exit(EXIT_FAILURE);
} else {
g_printerr("%s: Error \"%s\" while trying to show notification. Trying to reconnect.\n", argv[0], error->message);
errcount++;
g_error_free(error);
error = NULL;
notify_uninit();
usleep(500 * 1000);
if(!notify_init("Udev-Block-Notification")) {
fprintf(stderr, "%s: Can't create notify.\n", argv[0]);
exit(EXIT_FAILURE);
}
}
}
errcount = 0;
free(notifystr);
udev_device_unref(dev);
}
// This is not really needed... But we want to make shure not to eat 100% CPU if anything breaks. ;)
usleep(50 * 1000);
}
}
udev_unref(udev);
return EXIT_SUCCESS;
}
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