From a339efad2a4ba8826d2234ffb7714084142b024f Mon Sep 17 00:00:00 2001
From: Bram Matthys <syzop@vulnscan.org>
Date: Sun, 8 Aug 2021 10:14:48 +0200
Subject: [PATCH] Add exit_client_fmt() which accepts formatting characters.

---
 include/h.h |  1 +
 src/misc.c  | 17 +++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/h.h b/include/h.h
index e5c574150..c071d8295 100644
--- a/include/h.h
+++ b/include/h.h
@@ -285,6 +285,7 @@ extern char *myctime(time_t);
 extern char *short_date(time_t, char *buf);
 extern char *long_date(time_t);
 extern void exit_client(Client *client, MessageTag *recv_mtags, char *comment);
+extern void exit_client_fmt(Client *client, MessageTag *recv_mtags, FORMAT_STRING(const char *pattern), ...) __attribute__((format(printf, 3, 4)));
 extern void exit_client_ex(Client *client, Client *origin, MessageTag *recv_mtags, char *comment);
 extern void initstats(), tstats(Client *, char *);
 extern char *check_string(char *);
diff --git a/src/misc.c b/src/misc.c
index 0a386ee42..fd70a2715 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -558,6 +558,23 @@ void exit_client(Client *client, MessageTag *recv_mtags, char *comment)
 	exit_client_ex(client, client->direction, recv_mtags, comment);
 }
 
+/** Exit this IRC client, and all the dependents (users, servers) if this is a server.
+ * @param client        The client to exit.
+ * @param recv_mtags  Message tags to use as a base (if any).
+ * @param comment     The (s)quit message
+ */
+void exit_client_fmt(Client *client, MessageTag *recv_mtags, FORMAT_STRING(const char *pattern), ...)
+{
+	char comment[512];
+
+	va_list vl;
+	va_start(vl, pattern);
+	vsnprintf(comment, sizeof(comment), pattern, vl);
+	va_end(vl);
+
+	exit_client_ex(client, client->direction, recv_mtags, comment);
+}
+
 /** Exit this IRC client, and all the dependents (users, servers) if this is a server.
  * @param client        The client to exit.
  * @param recv_mtags  Message tags to use as a base (if any).