debug fastcgi streams while forwarding them https://redmine.lighttpd.net/projects/fcgi-debug
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#include "fcgi-debug.h"
/* move a fd to another and close the old one */
void move2fd(int srcfd, int dstfd) {
if (srcfd != dstfd) {
close(dstfd);
dup2(srcfd, dstfd);
close(srcfd);
}
}
/* replace an fd with /dev/null */
void move2devnull(int fd) {
move2fd(open("/dev/null", O_RDWR), fd);
}
void fd_init(int fd) {
#ifdef _WIN32
int i = 1;
#endif
#ifdef FD_CLOEXEC
/* close fd on exec (cgi) */
fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
#ifdef O_NONBLOCK
fcntl(fd, F_SETFL, O_NONBLOCK | O_RDWR);
#elif defined _WIN32
ioctlsocket(fd, FIONBIO, &i);
#endif
}
void ev_io_add_events(struct ev_loop *loop, ev_io *watcher, int events) {
if ((watcher->events & events) == events) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, watcher->events | events);
ev_io_start(loop, watcher);
}
void ev_io_rem_events(struct ev_loop *loop, ev_io *watcher, int events) {
if (0 == (watcher->events & events)) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, watcher->events & ~events);
ev_io_start(loop, watcher);
}
void ev_io_set_events(struct ev_loop *loop, ev_io *watcher, int events) {
if (events == (watcher->events & (EV_READ | EV_WRITE))) return;
ev_io_stop(loop, watcher);
ev_io_set(watcher, watcher->fd, (watcher->events & ~(EV_READ | EV_WRITE)) | events);
ev_io_start(loop, watcher);
}