On 9/13/07, Bachman Kharazmi <[EMAIL PROTECTED]> wrote:
> int main(int argc){
> int fd,err;
> char* myString = "helloworld\n";
> fd = open("rtser0", O_RDWR);
> printf("fd is %d\n", fd);
> ioctl(fd, RTSER_RTIOC_SET_CONFIG, &write_config);
> err=write(fd, myString, strlen(myString));
> printf("err is %d\n", err);
> close(fd);
> return 0;
> }
>
> gives
> sandbox:/home/bkw/code/driver_v4# ./simpledriver_v4
> fd is -1
> err is -1
>
> Which means that fd didn't open the device successfully? :/
> /B
This is POSIX, when a function call returns -1, check errno to see the
failure reason. BTW, you did not check the return value of ioctl.
--
Gilles Chanteperdrix
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