github.com_burnett01_rsync-.../agent-start

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#!/bin/sh
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FOLDER=${1:-default}
STORE_PATH="/tmp/ssh-agent/$FOLDER"
mkdir -p "$STORE_PATH"
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# Start the SSH agent if it isn't already.
if [ -z "$SSH_AGENT_PID" ]; then
if [ -f "$STORE_PATH/id" ]; then
# Our auth agent is already running.
# Reload the vars, and export them.
SSH_AGENT_PID=$(cat "$STORE_PATH/id")
export SSH_AGENT_PID
SSH_AUTH_SOCK=$(cat "$STORE_PATH/sock")
export SSH_AUTH_SOCK
else
eval "$(ssh-agent)" > /dev/null
echo "$SSH_AGENT_PID" > "$STORE_PATH"/id
echo "$SSH_AUTH_SOCK" > "$STORE_PATH"/sock
fi
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fi