int fd_set_nonblock(int fd);

#include <fcntl.h>

}
int
fd_set_nonblock(int fd) {
	int flags = fcntl(fd, F_GETFL);
    if (flags < 0) {
		perror("fcntl(F_GETFL):");
        return -1;
    }
    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
		perror("fcntl(F_SETFL):");
		return -1;
    }
	return 0;

	/* Mark stdout as non-blocking to avoid people who does not close stdin
	 * nor consumes it in their startup script getting dwl frozen */
	if (fd_set_nonblock(STDOUT_FILENO) < 0)
		close(STDOUT_FILENO);