From: Eric Andersen <andersen@codepoet.org>
Date: Fri, 12 Sep 2003 05:50:51 +0000 (-0000)
Subject: Teach rdate to timeout in 10 seconds to avoid blocking forever
X-Git-Tag: 1_00_pre3~10
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=e15138a87024c627d1a0e64b5d25dda1bc634c6a;p=oweals%2Fbusybox.git

Teach rdate to timeout in 10 seconds to avoid blocking forever
with odd or broken networking setups
---

diff --git a/util-linux/rdate.c b/util-linux/rdate.c
index a5699ebf4..cb180247e 100644
--- a/util-linux/rdate.c
+++ b/util-linux/rdate.c
@@ -32,11 +32,17 @@
 #include <time.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <signal.h>
 #include "busybox.h"
 
 
 static const int RFC_868_BIAS = 2208988800UL;
 
+static void socket_timeout()
+{
+	bb_error_msg_and_die("timeout connecting to time server\n");
+}
+
 static time_t askremotedate(const char *host)
 {
 	unsigned long int nett, localt;
@@ -46,6 +52,10 @@ static time_t askremotedate(const char *host)
 	if (getservbyname("time", "tcp") != NULL)
 		port="time";
 
+	/* Add a timeout for dead or non accessable servers */
+	alarm(10);
+	signal(SIGALRM, socket_timeout);
+
 	fd = xconnect(host, port);
 
 	if (safe_read(fd, (void *)&nett, 4) != 4)    /* read time from server */