>There is *NO* Copyto_User. There are copy_to_user and copy_from_user. >>>And anway, these are NOT a method of communication -- they are the >>low-level mechanizm under some of them. The mechanizms available are: >>1) Character device 2>>) ioctl on character device >>3) procfs file >>4) Netlink socket See i think we are talking about kernel programming . What i mean to say is that there is only two ways to communiacte to user space . One through a registerd read or write functions & other one through proc file system . copy_to_user is used when the user tries to read from the kernel space (usually its implemented through devices and proc files ). And i am quite sure that we can read or write to a file from kernel space using the internal file_read() or XXX_write() functions . regards, shyam ----- Original Message ----- From: "Jan Hudec" <bulb@xxxxxx> To: "shyamjith" <shyamjithe@xxxxxxxxxxxxxxx> Cc: <kernelnewbies@xxxxxxxxxxxx> Sent: Wednesday, February 02, 2005 1:20 PM Subject: Re: How to read file in kernel module? -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
