From 0c189fe3a751d56777d084c1f5ccbcbb1959c837 Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Fri, 31 May 2019 11:33:09 +0930
Subject: [PATCH] devtools/decode-iolog: tool to decode hexstrings from io
 logging.

Slow, but useful.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
 devtools/decode-iolog | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100755 devtools/decode-iolog

diff --git a/devtools/decode-iolog b/devtools/decode-iolog
new file mode 100755
index 000000000..32d370912
--- /dev/null
+++ b/devtools/decode-iolog
@@ -0,0 +1,20 @@
+#! /bin/sh
+# Feed log in stdin (sometimes 'grep' to get interesting parts)
+
+print_hex()
+{
+    hex="$1"
+    # We allow one character of trailing junk
+    while [ ${#hex} -gt 1 ]; do
+	/usr/bin/printf \\x$(echo "$hex" | cut -c1,2)
+	hex=$(echo "$hex" | cut -c3-)
+    done
+}
+
+while read TIMESTAMP LOGDIR HEX; do
+    case "$LOGDIR" in
+	*\[IN\]|*\[OUT\])
+	    echo $LOGDIR:$(print_hex "$HEX")
+	    ;;
+    esac
+done