2019-04-28 07:54:51 +00:00
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# bashbot
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2019-04-09 11:41:38 +00:00
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A Telegram bot written in bash.
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2019-04-28 07:54:51 +00:00
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Written by Drew (@topkecleon), Daniil Gentili (@danogentili), and Kay M
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2019-04-16 19:56:46 +00:00
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(@gnadelwartz).
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Contributions by JuanPotato, BigNerd95, TiagoDanin, and iicc1.
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2019-04-28 07:54:51 +00:00
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Released to the public domain wherever applicable.
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Elsewhere, consider it released under the
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[WTFPLv2](http://www.wtfpl.net/txt/copying/).
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## Prerequisites
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Depends on [tmux](http://github.com/tmux/tmux).
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Uses [JSON.sh](http://github.com/dominictarr/JSON.sh).
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Most complete [UTF-8 support for
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bashbot](doc/4_expert.md#Bashbot-UTF-8-Support) is availible if phyton is
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installed (optional).
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Bashbot [Documentation](https://github.com/topkecleon/telegram-bot-bash) and
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[Downloads](https://github.com/topkecleon/telegram-bot-bash/releases) are
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availible on www.github.com
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## Documentation
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* [Introdution to Telegram Bots](https://core.telegram.org/bots)
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* [One Bot to rule them
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all](https://core.telegram.org/bots#3-how-do-i-create-a-bot)
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* [Bot commands](https://core.telegram.org/bots#commands)
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* [Install Bashbot](doc/0_install.md)
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* Install release
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* Install from githup
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* Update Bashbot
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* Notes on Updates
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* [Create a new Telegram Bot with botfather](doc/1_firstbot.md)
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* [Getting Started](doc/2_usage.md)
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* Managing your Bot
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* Recieve data
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* Send messages
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* Send files, locations, keyboards
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* [Advanced Features](doc/3_advanced.md)
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* Access Control
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* Interactive Chats
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* Background Jobs
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* Inline queries
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* [Expert Use](doc/4_expert.md)
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* Handling UTF-8 character sets
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* Run as other user or system service
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* Scedule bashbot from Cron
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* [Best Practices](doc/5_practice.md)
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* Customize commands.sh
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* Seperate logic from commands
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* Test your Bot with shellcheck
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2019-05-10 10:04:49 +00:00
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* [Function Reference](doc/6_reference.md)
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* Sending Messages, Files, Keyboards
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* User Access Control
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* Inline Queries
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* Background and Interactive Jobs
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* [Deveoper Notess](doc/7_develop.md)
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* Setup your environment
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* Test, Add, Push changes
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* Prepare a new version
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* Bashbot testsuite
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2019-04-30 12:21:24 +00:00
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* [Customize bashbot environment](doc/8_custom.md)
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2019-04-29 17:38:54 +00:00
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* [Examples](examples/README.md)
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## Security Considerations
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Running a Telegram Bot means it is connected to the public and you never know
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whats send to your Bot.
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Bash scripts in general are not designed to be bullet proof, so consider this
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2019-05-01 12:36:34 +00:00
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Bot as a proof of concept. Bash programmers often struggle with 'quoting hell'
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and globbing, see [Implications of wrong
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quoting](https://unix.stackexchange.com/questions/171346/security-implications-o
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f-forgetting-to-quote-a-variable-in-bash-posix-shells)
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Whenever you are processing input from from untrusted sources (messages, files,
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network) you must be as carefull as possible, e.g. set IFS appropriate, disable
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2019-05-01 12:36:34 +00:00
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globbing (set -f) and quote everthing. In addition delete unused scripts and
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examples from your Bot, e.g. scripts 'notify', 'calc', 'question', and disable
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all not used commands.
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A powerful tool to improve your scripts is ```shellcheck```. You can [use it
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online](https://www.shellcheck.net/) or [install shellcheck
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locally](https://github.com/koalaman/shellcheck#installing). Shellcheck is used
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extensive in bashbot development to enshure a high code quality, e.g. it's not
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allowed to push changes without passing all shellcheck tests.
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In addition bashbot has a [test suite](doc/7_develop.md) to check if important
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functionality is working as expected.
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2019-04-28 07:54:51 +00:00
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### Run your Bot as a restricted user
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**I recommend to run your bot as a user, with almost no access rights.**
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All files your Bot have write access to are in danger to be overwritten/deleted
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if your bot is hacked.
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For the same reason ervery file your Bot can read is in danger to be disclosed.
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Restict your Bots access rigths to the absolute minimum.
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**Never run your Bot as root, this is the most dangerous you can do!** Usually
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the user 'nobody' has almost no rights on Unix/Linux systems. See [Expert
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use](doc/4_expert.md) on how to run your Bot as an other user.
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### Secure your Bot installation
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**Your Bot configuration must no be readable from other users.** Everyone who
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can read your Bots token can act as your Bot and has access to all chats your
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Bot is in!
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Everyone with read access to your Bot files can extract your Bots data.
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Especially your Bot Token in ```token``` must be protected against other users.
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No one exept you must have write access to the Bot files. The Bot must be
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restricted to have write access to ```count``` and ```tmp-bot-bash``` only,
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all other files must be write protected.
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To set access rights for your bashbot installation to a reasonable default run
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```sudo ./bashbot.sh init``` after every update or change to your installation
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directory.
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### Is this Bot insecure?
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Bashbot is not more (in)secure as any other Bot written in any other language,
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we have done our best to make it as secure as possible. But YOU are responsible
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for the bot commands you wrote and you should know about the risks ...
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### Why Bash and not the much better xyz?
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Well, thats a damn good question ... may be because I'm an Unix/Linux admin
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from stone age. Nevertheless there are more reasons from my side:
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- bashbot will run everywhere where bash is availible, from ebedded linux to
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mainframe
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- easy to integrate with other shell script, e.g. for sending system message /
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health status
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- no need to install or learn a new programming language, library or framework
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- no database, not event driven, not OO ...
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2019-04-27 19:10:55 +00:00
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@Gnadelwartz
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2019-04-27 13:48:03 +00:00
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2019-04-28 07:54:51 +00:00
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## That's it!
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2019-04-09 11:41:38 +00:00
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2019-04-28 07:54:51 +00:00
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If you feel that there's something missing or if you found a bug, feel free to
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submit a pull request!
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2019-04-09 11:41:38 +00:00
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2019-05-10 19:44:13 +00:00
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#### $$VERSION$$ v0.80-dev2-1-g0b36bc5
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