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 -- --------- 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/
