Any application that runs on a Linux system is assigned a process ID or PID. This is a numerical representation of the instance of the application on the system. It is used by the system administrator who may have to … Continue reading →

doing structure pointer includeing arrays in loop with functions making linklist

1. Compatibility Mode This mode defines the protocol used by most PCs to transfer data to a printer. It is commonly called the “Centronics” mode and is the method utilized with the standard parallel port. In this mode, data is … Continue reading →

Completed my master array declaring functions of each type.

The IEEE 1284 standard allows for faster throughput and bidirectional data flow with a theoretical maximum throughput of 4 megabytes per second; actual throughput is around 2 megabytes/second, depending on hardware. In the printer venue, this allows for faster printing … Continue reading →

Driver Modules can take command line arguments, but not with the argc/argv you might be used to. To allow arguments to be passed to your module, declare the variables that will take the values of the command line arguments as … Continue reading →

I have created master array. But the main problem to create master array by pointer. Let see how it is done.

i have installed fedora 17 but my pc  heats up too much.I have tried all things.And one more thing brighness key dont work also.

#include #include #include #include #include #include #include #include #include MODULE_LICENSE(“GPL”); MODULE_AUTHOR(“KERNEL_CODE”); #define DEBUG #define NAME “char_dev” #define NODE 5 #define SCULL_MAJOR 0 #define SCULL_MINOR 0 #define QUANTUM 8 #define SIZE 0 #define QSET 8 #define DEV_SIZE 1024 #define DEVICE_NAME “char_dev” … Continue reading →

RCS file: x.c,v Working file: x.c raghav: 1.5 access list: keyword substitution: kv total revisions: 5;    selected revisions: 5 description: Program to delete any file using file handling in c With function remove() we can delete/remove any file from the … Continue reading →

There are few steps to follow to open a file inside kernel from application layer. 1. Insert your character device driver inside the kernel using insmod and check its entry in the device driver table using cat /proc/devices and note … Continue reading →

CHARACTER DEVICE DEVELOPMENT: OPEN: CLOSE: —————————- revision 1.6 date: 2014/02/15 09:26:13; author: root; state: Exp; lines: +3 -0 *** empty log message *** —————————- revision 1.5 date: 2014/02/15 09:19:22; author: root; state: Exp; lines: +3 -1 release prototype use and … Continue reading →

There are some points which we have to note down while working in character device driver: 1. The second argument of unregister_chrdev_region function means the number of devices to unregister from the device table ….  should be matched with the … Continue reading →

Implementing cdev_add and cdev_init RCS file: header.h,v Working file: header.h head: 1.4 branch: locks: strict raghav: 1.4 access list: symbolic names: keyword substitution: kv total revisions: 4;    selected revisions: 4 description: This is a seperate header file where i have … Continue reading →