From 624658b8991650401852c60ee9c73615a6c22e89 Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@jerkface.net>
Date: Mon, 28 Nov 2022 14:08:45 -0500
Subject: new command pingwatch

---
 dot/local/bin/pingwatch | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100755 dot/local/bin/pingwatch

diff --git a/dot/local/bin/pingwatch b/dot/local/bin/pingwatch
new file mode 100755
index 0000000..a67d014
--- /dev/null
+++ b/dot/local/bin/pingwatch
@@ -0,0 +1,41 @@
+#!/bin/bash
+loud=
+target=${1:-2601:401:8200:2d4c:c6a5:6c8c:1304:bcf7}
+
+process()
+{
+        state=
+        while true
+        do
+                if read -t 5 line
+                then
+                        if [ "$loud" ]
+                        then
+                                printf '%s\n' "$line"
+                        fi
+                        case "$line" in
+                                PING*) continue ;;
+                        esac
+                        if [ "$state" = on ]
+                        then
+                                continue
+                        else
+                                date +'%c Online.'
+                                state=on
+                        fi
+                elif [ $? -gt 128 ] # read timeout
+                then
+                        if [ "$state" = off ]
+                        then
+                                continue
+                        else
+                                date +'%c Offline.'
+                                state=off
+                        fi
+                else # non-timeout read error
+                        break
+                fi
+        done
+}
+
+ping -n "$target" | process
-- 
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