-fifo_read_all(Config *cfg, struct timespec t, char *buf)
-{
- fd_set fds;
- int maxfd = -1;
- int ready = 0;
- struct stat st;
-
- FD_ZERO(&fds);
- for (Fifo *f = cfg->fifos; f; f = f->next) {
- /* TODO: Create the FIFO if it doesn't already exist. */
- if (lstat(f->name, &st) < 0) {
- error("Cannot stat \"%s\". Error: %s\n", f->name, strerror(errno));
- fifo_read_error(f, buf);
- continue;
- }
- if (!(st.st_mode & S_IFIFO)) {
- error("\"%s\" is not a FIFO\n", f->name);
- fifo_read_error(f, buf);
- continue;
- }
- if (f->fd < 0) {
- debug("%s: closed. opening. fd: %d\n", f->name, f->fd);
- f->fd = open(f->name, O_RDONLY | O_NONBLOCK);
- } else {
- debug("%s: already openned. fd: %d\n", f->name, f->fd);
- }
- if (f->fd == -1) {
- /* TODO: Consider backing off retries for failed fifos. */
- error("Failed to open \"%s\"\n", f->name);
- fifo_read_error(f, buf);
- continue;
- }
- debug("%s: open. fd: %d\n", f->name, f->fd);
- if (f->fd > maxfd)
- maxfd = f->fd;
- FD_SET(f->fd, &fds);
- }
- debug("selecting...\n");
- ready = select(maxfd + 1, &fds, NULL, NULL, NULL);
- debug("ready: %d\n", ready);
- assert(ready != 0);
- if (ready < 0)
- /* TODO: Do we really want to fail here? */
- fatal("%s", strerror(errno));
- while (ready) {
- for (Fifo *f = cfg->fifos; f; f = f->next) {
- if (FD_ISSET(f->fd, &fds)) {
- debug("reading: %s\n", f->name);
- switch (fifo_read_one(f, t, buf)) {
- /*
- * ### MESSAGE LOSS ###
- * is introduced by closing at EOM in addition
- * to EOF, since there may be unread messages
- * remaining in the pipe. However,
- *
- * ### INTER-MESSAGE PUSHBACK ###
- * is also gained, since pipes block at the
- * "open" call.
- *
- * This is an acceptable trade-off because we
- * are a stateless reporter of a _most-recent_
- * status, not a stateful accumulator.
- */
- case END_OF_MESSAGE:
- case END_OF_FILE:
- case FAILURE:
- close(f->fd);
- f->fd = -1;
- ready--;
- break;
- case RETRY:
- break;
- default:
- assert(0);
- }
- }
- }
- }
- assert(ready == 0);
-}
-
-int
-main(int argc, char *argv[])