mm: keep a guard page below a grow-down stack segment
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / Documentation / filesystems / dnotify_test.c
blob8b37b4a1e18da3b891dbddd38d0bfe927d919859
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>
8 static volatile int event_fd;
10 static void handler(int sig, siginfo_t *si, void *data)
12 event_fd = si->si_fd;
15 int main(void)
17 struct sigaction act;
18 int fd;
20 act.sa_sigaction = handler;
21 sigemptyset(&act.sa_mask);
22 act.sa_flags = SA_SIGINFO;
23 sigaction(SIGRTMIN + 1, &act, NULL);
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);