Date: Fri, 24 Dec 2010 17:01:44 +0100 From: Gary Jennejohn <gljennjohn@googlemail.com> To: Mohammad Hedayati <hedayati.mo@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Inappropriate ioctl for device Message-ID: <20101224170144.1d734e3c@ernst.jennejohn.org> In-Reply-To: <AANLkTimuz3KWG80yXR8gmg%2BYxVKW0pQyF2wtfwXqKU3K@mail.gmail.com> References: <AANLkTimuz3KWG80yXR8gmg%2BYxVKW0pQyF2wtfwXqKU3K@mail.gmail.com>
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On Fri, 24 Dec 2010 18:17:18 +0330
Mohammad Hedayati <hedayati.mo@gmail.com> wrote:
> I'm writing a simple char device. So far everything went so good
> (read/write), but here I'm going to add support for ioctl.
>
> int
> ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td)
> {
> int error = 0;
> uprintf("Here...\n");
> return(error);
> }
> and I'm calling it here:
>
> len = ioctl(cd, 0);
> perror("ioctl");
>
> but when runnig it says:
>
> ioctl: Inappropriate ioctl for device
Carefully read ioctl(2) and consider that you're passing in 0 as the cmd.
If you still don't understand your error, post again.
Hint: look at /sys/kern/sys_generic.c:^ioctl
--
Gary Jennejohn
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