libev - example: stdin

#include <ev.h> #include <ev.h> #include <stdio.h> ev_io stdin_watcher; // callback for io static void io_cb(EV_P_ struct ev_io* w, int revents) { char buffer[1024]; int res; printf("io event - fd: %d, event: %d\n", w->fd, revents); if ((res = read(w->fd, buffer, sizeof(buffer))) > 0) { printf("read %d bytes: %s", res, buffer); } else { perror("failed to read"); } } int main() { // use the default event loop struct ev_loop* loop = ev_default_loop(0); // initialize an io watcher ev_io_init(&stdin_watcher, io_cb, /*STDIN_FILENO*/0, EV_READ); ev_io_start(loop, &stdin_watcher); // event loop ev_run(loop, 0); return 0; }

ev_io_init(ev_io*, callback, int fd, int events)

• Configure an ev_io watcher.
• The fd is the file descriptor to receive events for.
• The events is either EV_READ, EV_WRITE or EV_READ | EV_WRITE.