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#!/bin/sh
[ -z "$SSH_AUTH_SOCK" ] && export SSH_AUTH_SOCK="$HOME/.ssh/ssh_auth_sock"
msg=$(ssh-add -L 2>&1)
if [ "$msg" = 'Could not open a connection to authentication agent.' ] ||
[ "$msg" = 'Error connecting to agent: No such file or directory' ] ||
[ "$msg" = 'Error connecting to agent: Connection refused' ]; then
rm -f "${SSH_AUTH_SOCK}"
ssh-agent -a "${SSH_AUTH_SOCK}" > /dev/null
fi
private_key="$1"
content="$(cat "$1.pub")"
if [ "$msg" = "The agent has no identities." ] ||
[ "${msg#*$content}" = "$msg" ]; then
ssh-add "$private_key"
fi
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