Hi, >Proc files are dynamic files, their data is not stored on HDD, there >contents are generated by kernel when they are open or read, actually >they are the medium for processes to communicate with kernel (to read >the kernel specific data or set the kernel specific parameters) This is true....but incomplete. You can also write into a proc file as long as the implementation of the particular proc file provides a write functionality. For ex: Setting some debugging level masks for /proc/scsi to get debug messages. You would need to write into the particular /proc file for that! You can indeed do this from user land. Hope this helps. Thanks, Vinod >you should not use them as normal files. > > > >Can you tell me what exactly you want to do, if you want normal file >behavior, what's the problem in using a normal file which is maintained >by file system. > > > >Regards, > >Gaurav > > > > _____ > > From: kernelnewbies-bounce@xxxxxxxxxxxx >[mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of linux lover >Sent: Tuesday, September 14, 2004 12:23 PM >To: Shakthi Kannan >Cc: kernelnewbies >Subject: Re: Re: Device driver query > > > >Hello Shakthi, > > But does it allow me to add or delete contents in file like >as usual normal file(I KNOW U SAID PROC FILE). What i want to update >contents of file periodically from user programs? Does /proc allows to >do that thing to me??? > >regards, > >linux_lover. > > > >On Mon, 13 Sep 2004 Shakthi Kannan wrote : > >Hi! > > > > > > You said that you want to create a file at loading > > > > time and want to > > > > remove that file forom file system at unloading > > > > time > > > >Why not use the /proc filesystem for this? It is quite simple. > > > >Example: > > > >int scull_read_procmem (char *buf, char **start, off_t offset, int > >count, int *eof, void *data) { > > int len = 0; > > len += sprintf (buf+len, "\nFrom scull_read_procmem"); > > return len; > >} > > > >static void scull_create_proc() { > > create_proc_read_entry ("scullmem", > > 0, > > NULL, > > scull_read_procmem, > > NULL); > >} > > > >Regards, > > > >Shaks > > > >-- > >Kernelnewbies: Help each other learn about the Linux kernel. > >Archive: http://mail.nl.linux.org/kernelnewbies/ > >FAQ: http://kernelnewbies.org/faq/ > > > > > >__________________________________________________ >Do You Yahoo!? >Tired of spam? Yahoo! Mail has the best spam protection around >http://mail.yahoo.com >
