what error do u get value of errno -SIGTERM amit ----- Original Message ----- From: "vishwas manral" <vishwas.manral@lycos.com> To: <kernelnewbies@nl.linux.org> Sent: Tuesday, February 10, 2004 4:43 PM Subject: Re: Problem with open > 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 > > --------- Original Message --------- > > DATE: Mon, 9 Feb 2004 02:36:58 > From: prasanna wakhare <prasannawakhare@yahoo.com> > To: vishwas.manral@lycos.com > Cc: kernelnewbies@nl.linux.org > > >hi, > >u confirm yrself what's this error > >by giving errno to strerror > >might be coz > >the file is not in existance,but u have succesfull > >make the mknod, > >if u r giving major number statically, > >then rather try to allot it dynamically > >check /proc/devices file > >lsmod , > >and rather some dependancy problem is still there > >then u include "sysdep.h" file of rubini > >which is nearly have resolved all symbols from 2.2 > >kernels, > >i given u all possibilities which i could think. > > > >--- vishwas manral <vishwas.manral@lycos.com> wrote: > >> Hi Prasanna, > >> > >> Going ahead from the previous after creating a > >> device file using mknod, if I try to do an open from > >> user space I get the fd as -1. > >> > >> Do let me know what you think I have done wrong? > >> > >> Thanks, > >> Vishwas > >> > >> > > > ____________________________________________________________ > Find what you are looking for with the Lycos Yellow Pages > http://r.lycos.com/r/yp_emailfooter/http://yellowpages.lycos.com/default.asp ?SRC=lycos10 > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
