From 37ad9a8586585503a9a904e99257e1dc6ca0736d Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Wed, 31 Aug 2022 20:32:27 +0200
Subject: [PATCH] Add function to capture printed content and store it.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>
---
 IPSet.xs | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/IPSet.xs b/IPSet.xs
index 82a9810..507f94a 100644
--- a/IPSet.xs
+++ b/IPSet.xs
@@ -11,6 +11,38 @@
 #include <libipset/session.h>
 #include <libipset/types.h>
 
+static int print_outfm_to_string(struct ipset_session *session,
+        void *p,
+        const char *fmt, ...)
+{
+        char** output = (char**)p;
+        va_list args;
+        int r;
+
+	char* buffer = NULL;
+
+        va_start(args, fmt);
+        r = vasprintf(&buffer, fmt, args);
+        va_end(args);
+
+	if (r < 0)
+		goto ERROR;
+
+	// Append
+	r = asprintf(output, "%s%s", (output && *output) ? *output : "", buffer);
+	if (r < 0)
+		goto ERROR;
+
+	// Success
+	r = 0;
+
+ERROR:
+	if (buffer)
+		free(buffer);
+
+        return r;
+}
+
 MODULE = IPSet		PACKAGE = IPSet
 
 struct ipset_session *
-- 
2.47.3