README.md

ioctl_finder

Kernel module that finds if a device implements unlocked_ioctl.

Build

1. cd src
2. make

All the compiled file (kernel module and user helper) will be under the build/ directory.

Execution

Using root:

1. Load the module using - insmod build/ioctl_finder.ko
   
2. Use the user_helper pragram. Usage:
   2.1. Run the user helper to get information on all the devices under /dev - ./build/ioctl_finder_user_helper
   2.2 To get a source code location of the ioctl(), you may add the linux sources path to the execution command as such:
   ./build/ioctl_finder_user_helper /path/to/kernel/sources

Additional Info

The module registering a char device in the path /dev/ioctl_finder_dev. This device handles a _IOWR IOCTL. The IOCTL recieves a struct ioctl_finder_req (see src/include/utils.h), and respond by filling the response field in the struct. You may use this information to create a new user helper with more features then the current, very basic, user helper.