From b0361ff113aaa873b1f9d9696f2e5e1e5c73d574 Mon Sep 17 00:00:00 2001
From: ai4rei <ai4rei@54d463be-8e91-2dee-dedb-b68131a5f0ec>
Date: Sun, 12 Dec 2010 14:53:57 +0000
Subject: * Cleaned up MOTD reading (related r292 and r4552). - Added a warning
 for common client crash caused by the sequence ' :' in MOTD.

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@14584 54d463be-8e91-2dee-dedb-b68131a5f0ec
---
 Changelog-Trunk.txt |  2 ++
 src/map/atcommand.c | 44 ++++++++++++++++++++++--------------
 src/map/pc.c        | 64 +++++++++++++++++++++++++++++++++++++++--------------
 3 files changed, 76 insertions(+), 34 deletions(-)

diff --git a/Changelog-Trunk.txt b/Changelog-Trunk.txt
index 4c6450257..d215beadb 100644
--- a/Changelog-Trunk.txt
+++ b/Changelog-Trunk.txt
@@ -1,6 +1,8 @@
 Date	Added
 
 2010/12/12
+	* Cleaned up MOTD reading (related r292 and r4552). [Ai4rei]
+	- Added a warning for common client crash caused by the sequence ' :' in MOTD.
 	* Fixed impossible condition in soundeffect script command (since athena-dev-2.1.1-mod1046, related r5841). [Ai4rei]
 	* Updates to the playBGM functionality (since r14335). [Ai4rei]
 	- Removed impossible condition in playBGM script command (from soundeffect).
diff --git a/src/map/atcommand.c b/src/map/atcommand.c
index 6f008c3af..0c584223f 100644
--- a/src/map/atcommand.c
+++ b/src/map/atcommand.c
@@ -6862,26 +6862,36 @@ ACMD_FUNC(identify)
  *------------------------------------------*/
 ACMD_FUNC(gmotd)
 {
-		char buf[CHAT_SIZE_MAX];
-		FILE *fp;
-	nullpo_retr(-1, sd);
-		if((fp = fopen(motd_txt, "r"))!=NULL){
-			while(fgets(buf, sizeof(buf), fp) != NULL)
+	char buf[CHAT_SIZE_MAX];
+	size_t len;
+	FILE* fp;
+
+	if( ( fp = fopen(motd_txt, "r") ) != NULL )
+	{
+		while( fgets(buf, sizeof(buf), fp) )
+		{
+			if( buf[0] == '/' && buf[1] == '/' )
 			{
-				int i;
-				if (buf[0] == '/' && buf[1] == '/')
-					continue;
-				for(i=0; buf[i]; i++){
-					if(buf[i]=='\r' || buf[i]=='\n'){
-						buf[i]=0;
-						break;
-					}
-				}
-				intif_broadcast(buf, strlen(buf)+1, 0);
+				continue;
+			}
+
+			len = strlen(buf);
+
+			while( len && ( buf[len-1] == '\r' || buf[len-1] == '\n' ) )
+			{// strip trailing EOL characters
+				len--;
+			}
+
+			if( len )
+			{
+				buf[len] = 0;
+
+				intif_broadcast(buf, len+1, 0);
 			}
-			fclose(fp);
 		}
-		return 0;
+		fclose(fp);
+	}
+	return 0;
 }
 
 ACMD_FUNC(misceffect)
diff --git a/src/map/pc.c b/src/map/pc.c
index 065932636..018b392f1 100644
--- a/src/map/pc.c
+++ b/src/map/pc.c
@@ -61,7 +61,7 @@ struct fame_list taekwon_fame_list[MAX_FAME_LIST];
 static unsigned short equip_pos[EQI_MAX]={EQP_ACC_L,EQP_ACC_R,EQP_SHOES,EQP_GARMENT,EQP_HEAD_LOW,EQP_HEAD_MID,EQP_HEAD_TOP,EQP_ARMOR,EQP_HAND_L,EQP_HAND_R,EQP_AMMO};
 
 #define MOTD_LINE_SIZE 128
-char motd_text[MOTD_LINE_SIZE][256]; // Message of the day buffer [Valaris]
+static char motd_text[MOTD_LINE_SIZE][CHAT_SIZE_MAX]; // Message of the day buffer [Valaris]
 
 struct duel duel_list[MAX_DUEL];
 int duel_count = 0;
@@ -8141,30 +8141,60 @@ int pc_readdb(void)
 // Read MOTD on startup. [Valaris]
 int pc_read_motd(void)
 {
-	FILE *fp;
-	int ln=0,i=0;
+	char* buf, * ptr;
+	unsigned int lines = 0, entries = 0;
+	size_t len;
+	FILE* fp;
+
+	// clear old MOTD
+	memset(motd_text, 0, sizeof(motd_text));
+
+	// read current MOTD
+	if( ( fp = fopen(motd_txt, "r") ) != NULL )
+	{
+		while( entries < MOTD_LINE_SIZE && fgets(motd_text[entries], sizeof(motd_text[entries]), fp) )
+		{
+			lines++;
+
+			buf = motd_text[entries];
 
-	memset(motd_text,0,sizeof(motd_text));
-	if ((fp = fopen(motd_txt, "r")) != NULL) {
-		while ((ln < MOTD_LINE_SIZE) && fgets(motd_text[ln], sizeof(motd_text[ln])-1, fp) != NULL) {
-			if(motd_text[ln][0] == '/' && motd_text[ln][1] == '/')
+			if( buf[0] == '/' && buf[1] == '/' )
+			{
 				continue;
-			for(i=0; motd_text[ln][i]; i++) {
-				if (motd_text[ln][i] == '\r' || motd_text[ln][i]== '\n') {
-					if(i)
-						motd_text[ln][i]=0;
-					else
-						motd_text[ln][0]=' ';
-					ln++;
-					break;
+			}
+
+			len = strlen(buf);
+
+			while( len && ( buf[len-1] == '\r' || buf[len-1] == '\n' ) )
+			{// strip trailing EOL characters
+				len--;
+			}
+
+			if( len )
+			{
+				buf[len] = 0;
+
+				if( ( ptr = strstr(buf, " :") ) != NULL && ptr-buf >= NAME_LENGTH )
+				{// crashes newer clients
+					ShowWarning("Found sequence '"CL_WHITE" :"CL_RESET"' on line '"CL_WHITE"%u"CL_RESET"' in '"CL_WHITE"%s"CL_RESET"'. This can cause newer clients to crash.\n", lines, motd_txt);
 				}
 			}
+			else
+			{// empty line
+				buf[0] = ' ';
+				buf[1] = 0;
+			}
+			entries++;
 		}
 		fclose(fp);
+
+		ShowStatus("Done reading '"CL_WHITE"%u"CL_RESET"' entries in '"CL_WHITE"%s"CL_RESET"'.\n", entries, motd_txt);
 	}
 	else
-		ShowWarning("In function pc_read_motd() -> File '"CL_WHITE"%s"CL_RESET"' not found.\n", motd_txt);
-	
+	{
+		ShowWarning("File '"CL_WHITE"%s"CL_RESET"' not found.\n", motd_txt);
+	}
+
 	return 0;
 }
 
-- 
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