Is it possible to execute a script with only editing/remove/making files

Cas

11/28/22, 4:13 PM

Just curious,

Would you be able to run a script (let's say test.sh) without every doing ./test.sh? You can only edit/make/remove files. A few things I thought about:

crontab, and then add a line with the current "time + 1 minute" and the script. But crontab doesn't have a file at a location that you can edit, instead you have to edit it with crontab -e which is a command, so this one isn't an option.
.service file, make a service that runs the script, but then you'd have to do systemctl daemon-reload && systemctl start service to start the service, so this one also isn't an option.

Do you have an idea?

0 + 4

command-line

bash

scripts

steeldriver

11/28/22, 4:27 PM

This seems like an arbitrary distinction - is `sudo cp myscript /etc/cron.daily` a command, or is it "editing/remove/making" a file? what about `sudo nano /var/spool/cron/crontabs/someuser`?

Cas

11/28/22, 4:40 PM

See it like I made a samba share of `/`. I can access the complete filesystem from a different device, but can only edit/remove/make files (because it's just a samba share). So `sudo cp myscript /etc/cron.daily` wouldn't be possible, but I CAN put my script there, as I have "samba access" to that folder. P.S. I haven't actually made a samba share of /, relax, it was just a good example.

FedKad

11/28/22, 7:09 PM

You should also explain the reasons behind this question. How is a system supposed to run a command without giving some kind of "trigger" to do it?

zwets

11/28/22, 9:37 PM

Yes, this is possible if you had write permission for any file that is periodically or incidentally invoked (like your `.profile`). As @steeldriver points out, your user crontab or a timer unit would fit the bill. If you'd like to have it run by any other user on the system (e.g. `root`), you'll need to ask them, as we normally call this an exploit when it happens without consent.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Is it possible to execute a script with only editing/remove/making files

TH: เป็นไปได้หรือไม่ที่จะรันสคริปต์ด้วยการแก้ไข/ลบ/สร้างไฟล์เท่านั้น

RO: Este posibil să executați un script doar cu editarea/eliminarea/realizarea fișierelor

RU: Можно ли выполнить скрипт только с редактированием/удалением/созданием файлов

VI: Có thể thực thi tập lệnh chỉ bằng cách chỉnh sửa/xóa/tạo tệp không

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