From: Martin Mares <mj@ucw.cz>
Date: Fri, 31 Dec 2010 15:19:25 +0000 (+0100)
Subject: Avoid (quite improbable) buffer overflow
X-Git-Tag: v1.13~17
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=a98826f68eb6f8de878e10ddbcc6a3a2cd4970c7;p=nwho.git

Avoid (quite improbable) buffer overflow
---

diff --git a/nwhod.c b/nwhod.c
index 5d0cee0..4f348e6 100644
--- a/nwhod.c
+++ b/nwhod.c
@@ -101,8 +101,8 @@ scan_utmp(struct nwho_pkt *p, time_t now)
 	name[9] = 0;
 	strcpy(h->name, name);
 	h->login_time = htonl(now - u->ut_time);
-	sprintf(h->con, "%.7s", u->ut_line);
-	sprintf(device, "/dev/%s", u->ut_line);
+	snprintf(h->con, sizeof(h->con), "%s", u->ut_line);
+	snprintf(device, sizeof(device), "/dev/%s", u->ut_line);
 	if (stat(device, &st) < 0)
 	  continue;
 	h->mesg_y = !!(S_IWGRP & st.st_mode);