100 lines
1.9 KiB
C
100 lines
1.9 KiB
C
#include <stdbool.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <errno.h>
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#include <signal.h>
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#include <sys/epoll.h>
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#include <sys/signalfd.h>
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#include "event_loop.h"
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/*
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* Data
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*/
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static bool _to_work = true;
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static int _sig_fd = -1;
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/*
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* Private API
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*/
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// Initialize signals.
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// Returns:
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// - true on success
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// Remarks:
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// - loop_init() must be called before this one
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static bool signals_init() {
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, SIGTERM);
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sigaddset(&mask, SIGINT);
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sigaddset(&mask, SIGQUIT);
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if (sigprocmask(SIG_BLOCK, &mask, NULL) == -1) {
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printf("[!] sigprocmask failed: %d\n", errno);
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return false;
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}
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_sig_fd = signalfd(
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-1,
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&mask,
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SFD_NONBLOCK
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);
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if (_sig_fd == -1) {
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printf("[!] signalfd failed: %d\n", errno);
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return false;
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}
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struct epoll_event ev;
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ev.data.fd = _sig_fd;
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ev.events = EPOLLIN;
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bool loop_res = loop_ctl(
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EPOLL_CTL_ADD,
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_sig_fd,
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&ev
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);
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if (!loop_res) {
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close(_sig_fd);
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printf("[!] loop_ctl failed\n");
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return false;
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}
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return true;
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}
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static void signals_deinit() {
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close(_sig_fd);
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}
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/*
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* Callbacks and main
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*/
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// This callback is called by loop_wait when event happens.
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static void on_fd_event(int fd, uint32_t events) {
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// Termination
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if (fd == _sig_fd) {
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_to_work = false;
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}
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else {
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printf("[!] Event has happened on an unknown file descriptor\n");
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}
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}
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int main(int argc, char **argv) {
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if (!loop_init(on_fd_event)) {
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return 1;
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}
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if (!signals_init()) {
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loop_deinit();
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return 1;
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}
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while (_to_work) {
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if (!loop_wait()) {
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printf("[!] loop_wait returns false, stopping...\n");
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break;
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}
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printf("--- loop ---\n");
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}
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signals_deinit();
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loop_deinit();
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return 0;
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}
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