On 5/3/06, Richard <field1227@xxxxxxxxx> wrote:
Hi, I want to write a module, and the module can read a lot of data from a generic file. I don't want to read through /proc file, because the generic file is a configure file for the module. So , how to write a module which reads data from a file ?
Don't do that. kernel code borrows the context of whatever userspace application they run on behalf of, it has no explicit process context of its own, so manipulating files will always happen on behalf of a userspace process (and likely a different one each time your code is invoked) - it's going to be a mess and has all the potential in the world of blowing up. Just don't do it. Use netlink sockets, procfs, sysfs etc, don't manipulate plain files directly from kernel code. Please search both the LKML & kernelnewbies archives, this has been discussed to death already. -- Jesper Juhl <jesper.juhl@xxxxxxxxx> Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please http://www.expita.com/nomime.html -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
