[GitHub/mt8127/android_kernel_alcatel_ttab.git] / Documentation / filesystems / dnotify_test.c

#define _GNU_SOURCE	/* needed to get the defines */
#include <fcntl.h>	/* in glibc 2.2 this has the needed
				   values defined */
#include <signal.h>
#include <stdio.h>
#include <unistd.h>

static volatile int event_fd;

static void handler(int sig, siginfo_t *si, void *data)
{
	event_fd = si->si_fd;
}

int main(void)
{
	struct sigaction act;
	int fd;

	act.sa_sigaction = handler;
	sigemptyset(&act.sa_mask);
	act.sa_flags = SA_SIGINFO;
	sigaction(SIGRTMIN + 1, &act, NULL);

	fd = open(".", O_RDONLY);
	fcntl(fd, F_SETSIG, SIGRTMIN + 1);
	fcntl(fd, F_NOTIFY, DN_MODIFY|DN_CREATE|DN_MULTISHOT);
	/* we will now be notified if any of the files
	   in "." is modified or new files are created */
	while (1) {
		pause();
		printf("Got event on fd=%d\n", event_fd);
	}
}
Commit	Line	Data
1e0051ae RD	1	#define _GNU_SOURCE /* needed to get the defines */
	2	#include <fcntl.h> /* in glibc 2.2 this has the needed
	3	values defined */
	4	#include <signal.h>
	5	#include <stdio.h>
	6	#include <unistd.h>
	7
	8	static volatile int event_fd;
	9
	10	static void handler(int sig, siginfo_t si, void data)
	11	{
	12	event_fd = si->si_fd;
	13	}
	14
	15	int main(void)
	16	{
	17	struct sigaction act;
	18	int fd;
	19
	20	act.sa_sigaction = handler;
	21	sigemptyset(&act.sa_mask);
	22	act.sa_flags = SA_SIGINFO;
	23	sigaction(SIGRTMIN + 1, &act, NULL);
	24
	25	fd = open(".", O_RDONLY);
	26	fcntl(fd, F_SETSIG, SIGRTMIN + 1);
	27	fcntl(fd, F_NOTIFY, DN_MODIFY\|DN_CREATE\|DN_MULTISHOT);
	28	/* we will now be notified if any of the files
	29	in "." is modified or new files are created */
	30	while (1) {
	31	pause();
	32	printf("Got event on fd=%d\n", event_fd);
	33	}
	34	}