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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1e0051ae RD |
2 | #define _GNU_SOURCE /* needed to get the defines */ |
3 | #include <fcntl.h> /* in glibc 2.2 this has the needed | |
4 | values defined */ | |
5 | #include <signal.h> | |
6 | #include <stdio.h> | |
7 | #include <unistd.h> | |
8 | ||
9 | static volatile int event_fd; | |
10 | ||
11 | static void handler(int sig, siginfo_t *si, void *data) | |
12 | { | |
13 | event_fd = si->si_fd; | |
14 | } | |
15 | ||
16 | int main(void) | |
17 | { | |
18 | struct sigaction act; | |
19 | int fd; | |
20 | ||
21 | act.sa_sigaction = handler; | |
22 | sigemptyset(&act.sa_mask); | |
23 | act.sa_flags = SA_SIGINFO; | |
24 | sigaction(SIGRTMIN + 1, &act, NULL); | |
25 | ||
26 | fd = open(".", O_RDONLY); | |
27 | fcntl(fd, F_SETSIG, SIGRTMIN + 1); | |
28 | fcntl(fd, F_NOTIFY, DN_MODIFY|DN_CREATE|DN_MULTISHOT); | |
29 | /* we will now be notified if any of the files | |
30 | in "." is modified or new files are created */ | |
31 | while (1) { | |
32 | pause(); | |
33 | printf("Got event on fd=%d\n", event_fd); | |
34 | } | |
35 | } |