#ifndef _POLL_H #define _POLL_H 1 // https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/poll.h.html #include <sys/cdefs.h> __BEGIN_DECLS struct pollfd { int fd; /* The following descriptor being polled. */ short events; /* The input event flags. */ short revents; /* The output event flags. */ }; typedef unsigned long nfds_t; #define POLLIN 0x001 #define POLLRDNORM 0x002 #define POLLRDBAND 0x004 #define POLLPRI 0x008 #define POLLOUT 0x010 #define POLLWRNORM 0x020 #define POLLWRBAND 0x040 #define POLLERR 0x080 #define POLLHUP 0x100 #define POLLNVAL 0x200 int poll(struct pollfd fds[], nfds_t nfds, int timeout); __END_DECLS #endif