Help Fix Mknod Kernel Bug

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    kernel mknod

    No, you cannot select Mknod and rm cli from kernel space. These are bash commands. However, all other options are to create and extract the device node file of the actual module from kernel space. In the component’s initialization function, you can create functions like class_create(), then device_create() after you’ve registered your device. After calling cdev_init() , you can use this event to create a file with two nodes. Similarly, you can use device_destroy() in addition to class_destroy() in the module_exit function to disable a node file.

    kernel mknod

    Here are examples of laws that create /dev/kmem in the best character device initialization function:

    integer base number;dev_t devNr; // Merge 32-bit and main seconddevice power symbolsThe structure of the educational environment *pClass; // class_create matches thisstatic integer __init devkoInit(void)  * pDev computer structure;  // Save the temperature device  majorNum = register_chrdev(0, "devko", &fileOps);  if (number older < 0)    printk(KERN_ALERT Instead of "Device registration failed: %dn", majorNum);    return the base number;    devNo = MKDEV (major number, 0); // create version dev_t, 32 pieces of numbers  // Create /sys/class/kmem, earn to /dev/kmem  pClass = class_create(THIS_MODULE, "kmem");  just in case if (is_err(pclass))   printk(KERN_WARNING "nUnable to create class");    unregister_chrdev_region(devNo, 1);    repay -1;    // Create /dev/kmem for char dev  if (IS_ERR(pDev = device_create(pClass, NULL, devNo, NULL, "kmem")))    printk(KERN_WARNING "devko.ko can create /dev/kmemn"); not class_destroy(pClass);    unregister_chrdev_region(devNo, 1);    return -1;    King 0; // ends devkoInitstatic void __exit devkoExit(void)  // clean up after ourselves  device_destroy(pClass, devNo); // Delete /dev/kmem  class_destroy(pClass); // Delete module /sys/class/kmem  unregister_chrdev(majorNum, DEVICE_NAME); // Unregister the device // Final reference to devkoExit

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    replied March 20, 2018 at 9:36 am

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