From 847943f807fd4dab702b26929ec9ec8c3992ac1f Mon Sep 17 00:00:00 2001
From: Kevin Cotugno <kevin@kevincotugno.com>
Date: Thu, 19 Oct 2017 22:55:20 -0700
Subject: [PATCH] Only use the sentinal if it exists

---
 profile         |  6 ++++--
 ssh-sentinel.sh | 29 +++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 ssh-sentinel.sh

diff --git a/profile b/profile
index 6045384..4488487 100644
--- a/profile
+++ b/profile
@@ -48,10 +48,12 @@ function passgen () {
 		tr "$tr1" "$tr2" && echo
 }
 
+if [[ -f "$HOME/.ssh-sentinel.sh" ]]; then
+	source "$HOME/.ssh-sentinel.sh"
+fi
+
 export EDITOR='nvim'
 
 alias l="ls -lah"
 alias ll="ls -lh"
 alias la="ls -lah"
-
-source $HOME/.ssh-sentinel.sh
diff --git a/ssh-sentinel.sh b/ssh-sentinel.sh
new file mode 100644
index 0000000..5e57c4f
--- /dev/null
+++ b/ssh-sentinel.sh
@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+file="$HOME/.ssh-agent"
+found=0
+
+which ssh-agent &> /dev/null
+if (( $? )); then
+	exit 1
+fi
+
+if [[ -e $file ]]; then
+	sockenv=`cat $file | grep SSH_AUTH_SOCK`
+	pidenv=`cat $file | grep SSH_AGENT_PID`
+	sock=`echo "$sockenv" | grep -oP "(?<=\=)/.*$"`
+	pid=`echo "$pidenv" | grep -o "[0-9]*"`
+	proc=`ps ax | grep "^ $pid.*ssh-agent"`
+
+	if [[ -S "$sock" && -O "$sock" && -n "$proc" ]]; then
+		export "$sockenv"
+		export "$pidenv"
+		found=1
+	fi
+fi
+
+if (( ! $found )); then
+	export `ssh-agent -s | grep -oP "^.+(?=; export)" | tee "$file"`
+fi
+
+chmod 600 "$file"