Immutable-file-linux

A small fun project to make any file in linux system immutable/non writable by hooking sys_openat and sys_write system calls using ftrace.

Instructions

• Change the target file path(default set to /tmp/test.txt) in fh_sys_openat funtion.
• Run make from terminal
• Load the module using sudo insmod immutable_file.ko

Reference for: https://nixhacker.com/hooking-syscalls-in-linux-using-ftrace