From 259ead07dd49045a49916c042032527e7d0be52f Mon Sep 17 00:00:00 2001
From: "graham.gower" <graham.gower@e8e0d7a0-c8d9-11dd-a880-a1081c7ac358>
Date: Thu, 17 Dec 2009 06:42:43 +0000
Subject: [PATCH] Add a message callback function to the config struct for
 libopkg users.

git-svn-id: http://opkg.googlecode.com/svn/trunk@496 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358
---
 libopkg/opkg_conf.h    |  3 +++
 libopkg/opkg_message.c | 18 +++++++++++++++---
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/libopkg/opkg_conf.h b/libopkg/opkg_conf.h
index 67b660f..52498f5 100644
--- a/libopkg/opkg_conf.h
+++ b/libopkg/opkg_conf.h
@@ -57,6 +57,9 @@ struct opkg_conf
 
      uint pfm; /* package field mask */
 
+     /* For libopkg users to capture messages. */
+     void (*opkg_vmessage)(int, const char *fmt, va_list ap);
+
      /* options */
      int autoremove;
      int force_depends;
diff --git a/libopkg/opkg_message.c b/libopkg/opkg_message.c
index a21a1a2..81afc97 100644
--- a/libopkg/opkg_message.c
+++ b/libopkg/opkg_message.c
@@ -78,14 +78,26 @@ opkg_message (message_level_t level, const char *fmt, ...)
 {
 	va_list ap;
 
-	if (conf && (conf->verbosity < level))
+	if (conf->verbosity < level)
 		return;
 
+	if (conf->opkg_vmessage) {
+		/* Pass the message to libopkg users. */
+		va_start (ap, fmt);
+		conf->opkg_vmessage(level, fmt, ap);
+		va_end (ap);
+		return;
+	}
+
 	va_start (ap, fmt);
 
 	if (level == ERROR) {
-		char msg[256];
-		vsnprintf(msg, 256, fmt, ap);
+#define MSG_LEN 256
+		char msg[MSG_LEN];
+		if (vsnprintf(msg, MSG_LEN, fmt, ap) >= MSG_LEN) {
+			fprintf(stderr, "%s: Message truncated!\n",
+					__FUNCTION__);
+		}
 		push_error_list(msg);
 	} else
 		vprintf(fmt, ap);
-- 
2.30.2