Correctly handle failure of pipe() call in swap_to_tcp()

src/dnsmasq.c

@@ -2091,11 +2091,11 @@ int swap_to_tcp(struct frec *forward, time_t now, int status, struct dns_header
 	if (daemon->tcp_pids[i] == 0 && daemon->tcp_pipes[i] == -1)
 	  break;
       
-      /* No slots */
-      if (i < 0)
-	return STAT_ABANDONED;
-      
-      if (pipe(pipefd) == 0 && (p = fork()) != 0)
+      /* No slots or no pipe */
+      if (i < 0 || pipe(pipefd) != 0)
+	return STAT_ABANDONED;`
+				
+      if ((p = fork()) != 0)
 	{
 	  close(pipefd[1]); /* parent needs read pipe end. */
 	  if (p == -1)

src/util.c

@@ -767,8 +767,8 @@ int retry_send(ssize_t rc)
 
 /* rw = 0 -> write
    rw = 1 -> read
-   rw = 2 -> read once
-   rw = 3 -> write once
+   rw = 2 -> write once
+   rw = 3 -> read once
 
    "once" fail if all the data doesn't arrive/go in a single read/write.
    This indicates a timeout of a TCP socket.