1 files changed, 48 insertions, 0 deletions
diff --git a/kvm-user-daemon.sh b/kvm-user-daemon.sh
new file mode 100755
index 0000000..017644e
--- /dev/null
+++ b/kvm-user-daemon.sh
@@ -0,0 +1,48 @@
+#!/bin/sh
+# File: /usr/local/bin/kvm-user-daemon.sh
+# Location: vm2
+# Author: bgstack15
+# Startdate: 2023-01-11-4 11:37
+# Title: KVM user daemon
+# Project: kvm-mapping
+# Purpose: daemon that runs inside user session and runs a script when specific USB device is plugged in
+# History:
+# Usage:
+#    Run at start of session, such as in ~/.fluxbox/startup
+# Reference:
+#    original design (at least my third time) of stdout/stderr timestamps and logging
+# Improve:
+# Dependencies:
+# Documentation:
+test -z "${LOGFILE}" && test -d ~/log && LOGFILE=~/log/kvm
+test -z "${LOGFILE}" && test -d ~/.log && LOGFILE=~/.log/kvm
+test -z "${LOGFILE}" && export LOGFILE=/tmp/kvm-log
+KVMFILE=/run/kvm/kvmfile
+STOPFILE=/tmp/stop-kvm # touch this file to stop the daemons for all users
+# The user should set RUNSCRIPT, which is what should happen when the kvm is switched to this output.
+test -z "${RUNSCRIPT}" && RUNSCRIPT=~/bin/kvm-plugged-in.sh
+! test -x "${RUNSCRIPT}" && RUNSCRIPT=/usr/local/bin/kvm-plugged-in.sh
+# Crazy nesting allows stdout, stderr prepended with timestamps and "STDERR", both to normal streams and to the logfile.
+{
+   {
+      {
+         # Safety valve. When this file exists, the loop stops.
+         while ! test -f "${STOPFILE}" ;
+         do
+            sleep 1
+            test -f "${KVMFILE}" && {
+               #env
+               #echo "sample error" 1>&2
+               echo "kvm input detected, running \"${RUNSCRIPT}\""
+               "${RUNSCRIPT}"
+               # delay a few seconds, because switching inputs fastis unlikely and not recommended, and so that any other user daemons looking for it can find it and also react.
+               { sleep 3 ; rm -f "${KVMFILE}" ; }
+            }
+         done
+      } 2>&3 1>&4
+   } 3>&1 1>&4 | plecho "STDERR:" | tee -a "${LOGFILE}" 1>&2 
+} 4>&1 | plecho | tee -a "${LOGFILE}"
+# Delay a few seconds so other daemons can also find it and stop
+sleep 3 ; rm "${STOPFILE}" 1>/dev/null 2>&1
+# exit 0 with this nop
+: