On 12/01/07, Jan Engelhardt <[EMAIL PROTECTED]> wrote:
On Jan 12 2007 11:27, Jesper Juhl wrote: > On 12/01/07, congwen <[EMAIL PROTECTED]> wrote: >> Hello everyone, I want to create and read/write a file in Linux kernel or >> device driver, > > Don't read/write user space files from kernel space. > > Please search the archives, this get asked a lot and it has been > explained a million times why it's a bad idea. > You can also read http://www.linuxjournal.com/article/8110 The article does it the bad way. IMHO filp_open() and vfs_read/vfs_write() are much less problematic wrt. to userspace. FWIW see ftp://ftp-1.gwdg.de/pub/linux/misc/suser-jengelh/kernel/quad_dsp-1.5.1.tar.bz2
There is no good way. You simply should NOT do it. -- Jesper Juhl <[EMAIL PROTECTED]> 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
