From 547065cb42de5122baabaee9bd7fef1cf30382eb Mon Sep 17 00:00:00 2001
From: Wouter Coekaerts <coekie@irssi.org>
Date: Sun, 17 Jul 2005 16:43:18 +0000
Subject: [PATCH] Fix /eval recursion crashing
 (debian/patches/04eval_recurse.dpatch by David Pashley)

git-svn-id: http://svn.irssi.org/repos/irssi/trunk@3865 dbcabf3a-b0e7-0310-adc4-f8d773084564
---
 src/core/commands.c                   | 6 ++++++
 src/core/commands.h                   | 3 ++-
 src/fe-common/core/fe-core-commands.c | 3 ++-
 src/fe-common/core/module-formats.c   | 1 +
 src/fe-common/core/module-formats.h   | 1 +
 5 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/core/commands.c b/src/core/commands.c
index 17b825b5..d9dc67af 100644
--- a/src/core/commands.c
+++ b/src/core/commands.c
@@ -945,12 +945,18 @@ static void event_command(const char *line, SERVER_REC *server, void *item)
 	parse_command(line, expand_aliases, server, item);
 }
 
+static int eval_recursion_depth=0;
 /* SYNTAX: EVAL <command(s)> */
 static void cmd_eval(const char *data, SERVER_REC *server, void *item)
 {
 	g_return_if_fail(data != NULL);
+	if (eval_recursion_depth > 100) 
+		cmd_return_error(CMDERR_EVAL_MAX_RECURSE);
 
+ 
+	eval_recursion_depth++;
 	eval_special_string(data, "", server, item);
+	eval_recursion_depth--;
 }
 
 /* SYNTAX: CD <directory> */
diff --git a/src/core/commands.h b/src/core/commands.h
index b4f4ea0e..0dda9f61 100644
--- a/src/core/commands.h
+++ b/src/core/commands.h
@@ -39,7 +39,8 @@ enum {
 	CMDERR_ILLEGAL_PROTO, /* requires different chat protocol than the active server */
 	CMDERR_NOT_GOOD_IDEA, /* not good idea to do, -yes overrides this */
 	CMDERR_INVALID_TIME, /* invalid time specification */
-	CMDERR_INVALID_CHARSET /* invalid charset specification */
+	CMDERR_INVALID_CHARSET, /* invalid charset specification */
+	CMDERR_EVAL_MAX_RECURSE /* eval hit recursion limit */
 };
 
 /* Return the full command for `alias' */
diff --git a/src/fe-common/core/fe-core-commands.c b/src/fe-common/core/fe-core-commands.c
index dd788a91..545cf027 100644
--- a/src/fe-common/core/fe-core-commands.c
+++ b/src/fe-common/core/fe-core-commands.c
@@ -49,7 +49,8 @@ static int ret_texts[] = {
         TXT_ILLEGAL_PROTO,
 	TXT_NOT_GOOD_IDEA,
         TXT_INVALID_TIME,
-        TXT_INVALID_CHARSET
+        TXT_INVALID_CHARSET,
+        TXT_EVAL_MAX_RECURSE
 };
 
 int command_hide_output;
diff --git a/src/fe-common/core/module-formats.c b/src/fe-common/core/module-formats.c
index 6d13ed08..66fb9f91 100644
--- a/src/fe-common/core/module-formats.c
+++ b/src/fe-common/core/module-formats.c
@@ -219,6 +219,7 @@ FORMAT_REC fecommon_core_formats[] = {
 	{ "invalid_level", "Invalid message level", 0 },
 	{ "invalid_size", "Invalid size", 0 },
 	{ "invalid_charset", "Invalid charset: $0", 1, { 0 } },
+	{ "eval_max_recurse", "/eval hit maximum recursion limit", 0 },
 
 	/* ---- */
 	{ NULL, "Themes", 0 },
diff --git a/src/fe-common/core/module-formats.h b/src/fe-common/core/module-formats.h
index ea9af5d2..55ea9df0 100644
--- a/src/fe-common/core/module-formats.h
+++ b/src/fe-common/core/module-formats.h
@@ -188,6 +188,7 @@ enum {
 	TXT_INVALID_LEVEL,
 	TXT_INVALID_SIZE,
 	TXT_INVALID_CHARSET,
+	TXT_EVAL_MAX_RECURSE,
 
 	TXT_FILL_11,