jerome-pouiller / ioctl Goto Github PK

During compilation:

$ make
gcc -Wall   -c -MMD -c -o ioctls_list.o ioctls_list.c
ioctls_list.c:66:10: fatal error: linux/gigaset_dev.h: No such file or directory
   66 | #include <linux/gigaset_dev.h>
      |          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make: *** [Makefile:22: ioctls_list.o] Error 1

Hi,

I have a small feature request: It would be helpful if one could specify the ioctl in it's raw (unencoded) form, i.e., like ./ioctl /dev/mydev dir=2,type=1,nr=0,size=4. This tool then just has to assemble it using the macro _IOC from ioctl.h:

#define _IOC(dir,type,nr,size) \
	(((dir)  << _IOC_DIRSHIFT) | \
	 ((type) << _IOC_TYPESHIFT) | \
	 ((nr)   << _IOC_NRSHIFT) | \
	 ((size) << _IOC_SIZESHIFT))

Jérôme, I know you've heard of Android's ioctl tool.

Here is the last version of it that seems to exist before it was removed because it is a "convenient tool for attacking buggy kernels", according to an Android developer... :(

https://android.googlesource.com/platform/system/core/+/68285c00334af57d9077648fb408a34643514df5/toolbox/ioctl.c

Perhaps you or one of the people that has stared/forked your ioctl will find this path of inquiry interesting. Cheers!

I'm trying build ioctl on a ancient buildroot (BR2_GCC_VERSION="4.4.1" / BR2_UCLIBC_VERSION_STRING="0.9.32.1") but it fails with the following error:

arm-buildroot-linux-uclibcgnueabi-gcc -Wall   -c -MMD -c -o ioctl.o ioctl.c
ioctl.c: In function ‘sighandler’:
ioctl.c:48: warning: implicit declaration of function ‘psiginfo’
arm-buildroot-linux-uclibcgnueabi-gcc   ioctl.o ioctls_list_empty.o   -o ioctl
ioctl.o: In function `sighandler':
ioctl.c:(.text+0x60): undefined reference to `psiginfo'
collect2: ld returned 1 exit status
make[1]: *** [ioctl] Error 1

To work around the issue I commented out:
psiginfo(pinfo, "ioctl returned with signal");
and added:
fprintf(stderr, "ioctl returned with signal %d", signum);
which is not ideal...

Any ideas on how I can make psiginfo work?

IOCTL for network devices
(wlan0 for example or any ethernet device)

You add it or I fork and add it myself?

Not being a dev or coder, (how) can I use ioctl to reverse these

/sys/class/drm/card0-eDP-1/status -> "connected"
/sys/class/drm/card0-DP-1/status -> "disconnected"

or make both of them "connected"?

Currently the stuff requires lots of headers to be installed.

The solution is to create a file with exact numeric values of ioctls, so a user doesn't have to install the packages with headers.

fs/xfs/libxfs/xfs_fs.h contains all of the XFS ioctls, which don't seem to get included in in the building of the list.

I'm most interested in being able to run XFS_IOC_GOINGDOWN.