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notify-tg for ssh
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| #!/bin/bash | |
| # 0. prerequisites: | |
| # register bot and get access token | |
| # message /newbot to @BotFather | |
| # enter bot name | |
| # save token received from @BotFather | |
| # send message to your newly created bot | |
| # find out chat_id with | |
| # curl -s https://api.telegram.org/bot${TOKEN}/getUpdates \ | |
| # | jq '.result[].message.chat.id' | uniq | |
| # | |
| # 1. put this script in ~/.ssh/backchannel/notify-tg.sh | |
| # | |
| # 2. start http server for backchannel | |
| # cat <<EOF > ~/.config/systemd/user/ssh-tg.service | |
| # [Unit] | |
| # Description=ssh backchannel | |
| # [Service] | |
| # Type=simple | |
| # Restart=always | |
| # ExecStart=/bin/sh -c 'cat ~/.ssh/backchannel/notify-tg.sh | nc -q 0 -l localhost -p 40000' | |
| # [Install] | |
| # WantedBy=default.target | |
| # EOF | |
| # | |
| # systemctl --user enable ssh-tg.service | |
| # systemctl --user start ssh-tg.service | |
| # | |
| # 3. ssh with remote forwarding to some host | |
| # ssh -R 40000:127.0.0.1:40000 some.server | |
| # | |
| # 4. on some.server source notify-tg.sh script fetched through backchannel | |
| # source <(curl -s http://localhost:40000/notify-tg.sh) | |
| # | |
| # 5. now you can use notify-tg without actually having the script on the server | |
| # | |
| # 6. to make things easier, add forwarding to .ssh/config and sourcing to .bashrc | |
| # | |
| # ps. I know, there are other ways to do this, but they may require enabling features in sshd | |
| # and that is not always possible. | |
| function notify-tg { | |
| TOKEN=your:token | |
| CHAT_ID=your_id | |
| CURL='curl -s -G --data-urlencode' | |
| DEST="https://api.telegram.org/bot${TOKEN}/sendMessage?chat_id=${CHAT_ID}" | |
| if [ "$1" = '-l' ]; then | |
| while read line; do | |
| $CURL "text=${line}" $DEST > /dev/null | |
| done | |
| else | |
| $CURL "text@-" $DEST > /dev/null | |
| fi | |
| } |
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