problem with ioctl command

rohandreamworld · 12-13-2010, 06:51 AM

I am porting some of code from solaris to linux..
The following code compiles fine on linux

Code:

int parentinputfd;
int bytestoread = 0;
...

result = ioctl (parentinputfd, I_NREAD, &bytestoread);
...

But when i run my program i get errorno = 22..
which is present in errorno.h as

Quote:

#define EINVAL 22 /* Invalid argument */

And program print error as
ioctl: Invalid argument

I am not getting that why its working properly on solaris but not on linux ..

Is I_NREAD worls on linux..??
And what are the alternatives for I_NREAD

Vermidias · 12-13-2010, 09:25 AM

I dont know where I_NREAD is defined but i think that could be your problem. you can define the ioctl commands in a header like this one.

http://lxr.free-electrons.com/source...linux/cs5535.h

or like in this example

http://people.ee.ethz.ch/~arkeller/l...e_howto-4.html

i hope that helps you

rohandreamworld · 12-15-2010, 05:19 AM

Thanks Vermidias...
Thats link were very useful indeed..