netfilter 08/09: xt_time: print timezone for user information

Patrick McHardy
2009-01-12T10:06:10Z

commit 0fd565aa7fdb2dc88c65b16a4e2260d4abd5b027
Author: Jan Engelhardt <jengelh@medozas.de>
Date: Mon Jan 12 10:51:56 2009 +0100

netfilter: xt_time: print timezone for user information

Let users have a way to figure out if their distro set the kernel
timezone at all.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/net/netfilter/xt_time.c b/net/netfilter/xt_time.c
index 29375ba..93acaa5 100644
--- a/net/netfilter/xt_time.c
+++ b/net/netfilter/xt_time.c
@@ -243,6 +243,17 @@ static struct xt_match xt_time_mt_reg __read_mostly = {

static int __init time_mt_init(void)
{
+ int minutes = sys_tz.tz_minuteswest;
+
+ if (minutes < 0) /* east of Greenwich */
+ printk(KERN_INFO KBUILD_MODNAME
+ ": kernel timezone is +%02d%02d\n",
+ -minutes / 60, -minutes % 60);
+ else /* west of Greenwich */
+ printk(KERN_INFO KBUILD_MODNAME
+ ": kernel timezone is -%02d%02d\n",
+ minutes / 60, minutes % 60);
+
return xt_register_match(&xt_time_mt_reg);
}