Initial commit

snippets/get_top_level_parent_pid.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+function top_level_parent_pid {
+    # Look up the parent of the given PID.
+    pid=${1:-$$}
+    stat=($(</proc/${pid}/stat))
+    ppid=${stat[3]}
+
+    # /sbin/init always has a PID of 1, so if you reach that, the current PID is
+    # the top-level parent. Otherwise, keep looking.
+    if [[ ${ppid} -eq 1 ]] ; then
+        echo ${pid}
+    else
+        top_level_parent_pid ${ppid}
+    fi
+}
+
+
+echo "Top Level Parent Pid: $(top_level_parent_pid)"
+echo "Top Level Command:    $(ps -o cmd= $(top_level_parent_pid))"
+
+exit 0