From 025cb2d2e769205bc066a26026febd2cecf2e74b Mon Sep 17 00:00:00 2001
From: Kyle Manna <kyle@kylemanna.com>
Date: Wed, 27 Aug 2014 21:01:57 -0700
Subject: [PATCH] ssh: Set default SSH_AGENT_PID for grep

* If `SSH_AGENT_PID` is unset, grep will succeed if another ssh-agent is
  running as it will match the string ` ssh-agent` where the PID was an
  empty string.
* Set a default value for the grep to a value that will never match if
  unset, i.e. -1.
---
 modules/ssh/init.zsh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/ssh/init.zsh b/modules/ssh/init.zsh
index 608e34e6..5729dc63 100644
--- a/modules/ssh/init.zsh
+++ b/modules/ssh/init.zsh
@@ -25,7 +25,7 @@ if [[ ! -S "$SSH_AUTH_SOCK" ]]; then
   source "$_ssh_agent_env" 2> /dev/null
 
   # Start ssh-agent if not started.
-  if ! ps -U "$USER" -o pid,ucomm | grep -q "${SSH_AGENT_PID} ssh-agent"; then
+  if ! ps -U "$USER" -o pid,ucomm | grep -q -- "${SSH_AGENT_PID:--1} ssh-agent"; then
     eval "$(ssh-agent | sed '/^echo /d' | tee "$_ssh_agent_env")"
   fi
 fi