#include <fcntl.h>
#include <time.h>
#include <errno.h>
+#include <signal.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/select.h>
static int uevent_netlink_sock;
static int udev_monitor_sock;
+static volatile int udev_exit;
static int init_udev_monitor_socket(void)
{
if (retval < 0) {
fprintf(stderr, "bind failed, %s\n", strerror(errno));
close(udev_monitor_sock);
+ udev_monitor_sock = -1;
return -1;
}
return 0;
}
+static void asmlinkage sig_handler(int signum)
+{
+ if (signum == SIGINT || signum == SIGTERM)
+ udev_exit = 1;
+}
+
int main(int argc, char *argv[])
{
+ struct sigaction act;
int env = 0;
fd_set readfds;
int i;
if (getuid() != 0) {
fprintf(stderr, "need to be root, exit\n\n");
- exit(1);
+ exit(2);
}
+ /* set signal handlers */
+ memset(&act, 0x00, sizeof(struct sigaction));
+ act.sa_handler = (void (*)(int)) sig_handler;
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = SA_RESTART;
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
+
retval = init_udev_monitor_socket();
if (retval)
goto out;
- init_uevent_netlink_sock();
+ retval = init_uevent_netlink_sock();
+ if (retval)
+ goto out;
- printf("udevmonitor prints received from the kernel [UEVENT] and after\n"
- "the udev processing, the event which udev [UDEV] has generated\n\n");
+ printf("udevmonitor prints the received event from the kernel [UEVENT]\n"
+ "and the event which udev sends out after rule processing [UDEV]\n\n");
- while (1) {
+ while (!udev_exit) {
static char buf[UEVENT_BUFFER_SIZE*2];
ssize_t buflen;
int fdcount;
if (udev_monitor_sock > 0)
close(udev_monitor_sock);
- return retval;
+ if (retval)
+ return 3;
+ return 0;
}