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TOMOYO Linux Cross Reference
Linux/Documentation/filesystems/dnotify_test.c

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  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 }
 35 

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