Inappropriate ioctl for device
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
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Re: Inappropriate ioctl for device
On Fri, 24 Dec 2010 18:17:18 +0330
Mohammad Hedayati hedayati...@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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Re: Inappropriate ioctl for device
On Fri, Dec 24, 2010 at 7:31 PM, Gary Jennejohn
gljennj...@googlemail.comwrote:
On Fri, 24 Dec 2010 18:17:18 +0330
Mohammad Hedayati hedayati...@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
It was a misspelling, I'm doing as bellow, if you mean the u_long.
unsinged long cmd = 0;
len = ioctl(cd, cmd);
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Re: Inappropriate ioctl for device
On Fri, 24 Dec 2010 19:37:37 +0330
Mohammad Hedayati hedayati...@gmail.com wrote:
On Fri, Dec 24, 2010 at 7:31 PM, Gary Jennejohn
gljennj...@googlemail.comwrote:
On Fri, 24 Dec 2010 18:17:18 +0330
Mohammad Hedayati hedayati...@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
It was a misspelling, I'm doing as bellow, if you mean the u_long.
unsinged long cmd = 0;
len = ioctl(cd, cmd);
No, that isn't what I meant. Read the kernel code - cmd = 0 is not
legal.
--
Gary Jennejohn
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Re: Inappropriate ioctl for device
On Fri, Dec 24, 2010 at 7:37 PM, Mohammad Hedayati hedayati...@gmail.comwrote:
On Fri, Dec 24, 2010 at 7:31 PM, Gary Jennejohn gljennj...@googlemail.com
wrote:
On Fri, 24 Dec 2010 18:17:18 +0330
Mohammad Hedayati hedayati...@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
It was a misspelling, I'm doing as bellow, if you mean the u_long.
unsinged long cmd = 0;
len = ioctl(cd, cmd);
Thanks, Problem is solved!
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