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-rw-r--r--Documentation/filesystems/dnotify_test.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/filesystems/dnotify_test.c b/Documentation/filesystems/dnotify_test.c
new file mode 100644
index 00000000..8b37b4a1
--- /dev/null
+++ b/Documentation/filesystems/dnotify_test.c
@@ -0,0 +1,34 @@
+#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);
+ }
+}