Just to clarify things. Are you saying *errno* is 1 or just that the return value from your open() is -1? It is errno's value that is needed before anyone here can answer your question. On Tuesday 10 February 2004 06:59, vishwas manral wrote: > Amit, > > I get the error -1 as I said, which maps to > #define EPERM 1 /* Operation not permitted */ > in error.h if I understand things correctly? > > Thanks, > Vishwas > > -----Original Message----- > From: kernelnewbies-bounce@nl.linux.org > [mailto:kernelnewbies-bounce@nl.linux.org]On Behalf Of Amit Limaye > Sent: Tuesday, February 10, 2004 5:13 PM > To: vishwas.manral@lycos.com; kernelnewbies@nl.linux.org > Subject: Re: Problem with open > > > what error do u get value of errno > > -SIGTERM > amit > > ---------------------------------------------- > Hi folks, > > I am unable to open the device file and any help here would be great. > > 1. I insert the module using insmod get the dynamic Major number > seeing /proc/devices. > > 2. Using the major number I add the device special file using mknod. > mknod- m /dev/devName c 254 0. > > 3. I now do an open on the device in the user space. I am unable to > open the file it returns -1. I tried to do open with O_RDONLY yet I > get the same error. > > Please let me know what I am doing wrong(link would be great too). I > checked the archives but found nothing useful. > > Thanks, > Vishwas -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
