Hi all I have a doubt I have checked the Char Driver from Linux Device Drivers 3rd edition and I can not understand how does the char driver is register in the newst way, I just have done by the Linux Kernel Module programing guide example
http://tldp.org/LDP/lkmpg/2.6/html/x569.html with the function int init_module(void) { Major = register_chrdev(0, DEVICE_NAME, &fops); if (Major < 0) { printk(KERN_ALERT "Registering char device failed with %d\n", Major); return Major; } printk(KERN_INFO "I was assigned major number %d. To talk to\n", Major); printk(KERN_INFO "the driver, create a dev file with\n"); printk(KERN_INFO "'mknod /dev/%s c %d 0'.\n", DEVICE_NAME, Major); printk(KERN_INFO "Try various minor numbers. Try to cat and echo to\n"); printk(KERN_INFO "the device file.\n"); printk(KERN_INFO "Remove the device file and module when done.\n"); return SUCCESS; } but the new way is with alloc_chrdev_region and struct cdev *my_cdev = cdev_alloc( ); my_cdev->ops = &my_fops; but i can not see any good and easy example on the internet Does anybody has seen any one ? One more thing After insert the module on the kernel I need to run mknod in order to make the node to interact with cat and echo instructions Is there another automatic way to do that ? I have read a litle bit from udev, but I wonder how does the /dev char drivers are created when linux start ? Thanks for all the help Sincerely yours Victor Rodriguez -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
