f = fopen(NULLRPC_FILE, "rw");
if (!f) {
- printerr(0, "failed to open %s\n", NULLRPC_FILE);
+ printerr(0, "failed to open %s: %s\n",
+ NULLRPC_FILE, strerror(errno));
exit(1);
}
pollfd.fd = fileno(f);
pollfd.events = POLLIN;
while (1) {
+ int save_err;
+
pollfd.revents = 0;
printerr(1, "entering poll\n");
ret = poll(&pollfd, 1, -1);
+ save_err = errno;
printerr(1, "leaving poll\n");
if (ret < 0) {
- if (errno != EINTR)
- printerr(0, "error return from poll\n");
+ if (save_err != EINTR)
+ printerr(0, "error return from poll: %s\n",
+ strerror(save_err));
} else if (ret == 0) {
/* timeout; shouldn't happen. */
} else {