fcntl & ioctl

[rajkumarmadhani]

hi,

I gone through with ioctl and fcntl.but iam still confusion with that.
could anybody please clarify exact difference between ioctl & fcntl

thanx in advance

[bhaslinux]

fcntl acts on a file descritor to change the way the file is to be handled
like duping the fd, locking file etc.,
IOCTL is to do commands on a device (which links with the kernel device driver)

[rajkumarmadhani]

means ioctl only particular to device drivers with out reconfiguring and compiling, can we change the behaviour of the driver with ioctl ?

[bhaslinux]

ioctl is a method by which we tell the device driver to do an operation on the device. Say, there are 10 operations possible on a device being implemented in the driver, then, to select what out of the 10 operations to do is done by the ioctl systemcall on the userspace.

[rajkumarmadhani]

thnk you for good info on ioctl

[lightsycle]

I have an ioctl question: I am trying to get kismet to run on suse 10.2, and I get a command not found when it tires to use ioctl for whatever. I have ethereal, did a ./configure && make of the wiretap dir, re-./configure && make && make install for ksimet, because I installed it first before I got ethereal. if I type ioctl at "#" I get command not found. is something missing? or did I not do the proper steps in the proper order?

Thanks

P.S. Using the bash shell