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Add steal-ssh-agent.

Xavier G authored on 29/07/2016 07:11:42
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+#!/bin/bash
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+# "Steal" the ssh-agent, assuming there is only one running and we
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+# are actually allowed to reach its socket (i.e. we are either root
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+# or the ssh-agent owner).
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+ssh_agent_pid=$(pgrep -f "^/usr/bin/ssh-agent")
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+if [ -z "${ssh_agent_pid}" ]; then
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+	echo "Unable to find ssh-agent"
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+	exit 158
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+fi
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+ssh_agent_ppid=$(perl -nlE 'say $1 if m#^PPid:\s*(\d+)$#' /proc/${ssh_agent_pid}/status)
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+export SSH_AGENT_PID="${ssh_agent_pid}"
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+export SSH_AUTH_SOCK=$(/bin/ls /tmp/ssh-*/agent.${ssh_agent_ppid})
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+[ $# -gt 0 ] && "$@"