EmbLogic's Blog

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1.2
date    2014.01.06.16.46.49;    author root;    state Exp;
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1.1
date    2014.01.06.15.17.49;    author root;    state Exp;
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desc
@Device driver unregistered using unregister_chrdev_region
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1.2
log
@dealloction of memory using KFREE
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Implemented the following:

1.Register the driver by using the new mechanism, allocate the memory , initialise and add the cdev to device table.

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1.2
date    2014.01.06.11.00.57;    author root;    state Exp;
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1.1
date    2014.01.06.10.57.33;    author root;    state Exp;
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desc
@this is source code for register device by the new mechnism and allocate the the memory by using kmalloc and add cdev to the device table.
@

1.2
log
@removed the  errors.
@

2.After registration, allocation, and adding the cdev to device table, delete the cdev form device table, deallocate the memory and unregister the driver.

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1.2
date    2014.01.06.11.03.44;    author root;    state Exp;
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1.1
date    2014.01.06.10.58.52;    author root;    state Exp;
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desc
@this is souce code for cleanup function in which unregister the driver by new mechnism and deallocate the mem.& cdev remove it in cleanup function.
@

1.2
log
@removed the errors.
@

Implemented the following:

1.Register the driver by using the new mechanism, allocate the memory and initialise and add the cdev to device table.

2.After registration, allocation, and adding the cdev to device table, delete the cdev form device table, deallocate the memory and unregister the driver.

Log file for init.c:

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1.3
date    2014.01.06.15.38.44;    author root;    state Exp;
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1.2
date    2014.01.06.14.16.20;    author root;    state Exp;
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1.1
date    2014.01.06.13.06.31;    author root;    state Exp;
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desc
@This is the source file of initialization file of driver initialization by new mechanism.
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1.3
log
@After register the driver and allocating the memory, initialize the cdev structure and add cdev to device table using cdev_init and cdev_add respectively.
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1.2
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@After registering the driver, allocate the memory using kmalloc by representing a structure in driver called ScullDev.
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Log file for exit.c:

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1.3
date    2014.01.06.15.41.04;    author root;    state Exp;
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1.2
date    2014.01.06.14.20.34;    author root;    state Exp;
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1.1
date    2014.01.06.13.07.52;    author root;    state Exp;
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desc
@This is the source file of exit file of driver initialization by new mechanism.
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1.3
log
@After allocating the memory and adding the cdev to device table, remove the cdev from device table using cdev_del and deallocate the memory too and unregister the driver.
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1.2
log
@After registering and allocating the size to driver, deallocate and unregister the driver.
@

INITIALIZATION  LOG FILE

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1.1
date    2014.01.06.15.15.50;    author root;    state Exp;
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desc
@Device Driver registration using alloc_chrdev_region
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1.1
log
@Initial revision
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CLEAN-UP LOG FILE
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1.1
date    2014.01.06.15.17.49;    author root;    state Exp;
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desc
@Device driver unregistered using unregister_chrdev_region
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1.1
log
@Initial revision
@

RCS file: requesting_client.c,v
Working file: requesting_client.c
head: 1.6
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total revisions: 6;    selected revisions: 6
description:
Requesting clients enter their data here.
Data includes the two operands and one operator.
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revision 1.6
date: 2014/01/06 00:33:13;  author: root;  state: Exp;  lines: +13 -5
Code is optimized by reducing the number of statements.
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revision 1.5
date: 2014/01/04 16:28:38;  author: root;  state: Exp;  lines: +7 -5
Final result is read by the requesting client from the pipe
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revision 1.4
date: 2014/01/03 18:46:50;  author: root;  state: Exp;  lines: +2 -2
Name of the variable is changed.
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revision 1.3
date: 2014/01/03 18:39:54;  author: root;  state: Exp;  lines: +2 -0
Statement is included to indicate that we are taking the data from requesting clients.
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revision 1.2
date: 2014/01/03 16:16:27;  author: root;  state: Exp;  lines: +6 -1
Previously arguments to main() function are incorrect.
Both error and warning are fixed.
file descriptor is collected from main() in string form and it is converted
back to integer.All the data from the structure is converted to a string using sprintf.
write() system call is used to write to the pipe.
Issue: Segmentation fault.
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revision 1.1
date: 2014/01/03 15:37:39;  author: root;  state: Exp;
Initial revision
=============================================================================
RCS file: processing_client.c,v
Working file: processing_client.c
head: 1.4
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total revisions: 4;    selected revisions: 4
description:
Processing client is created for single client.
checking whether the functionality is correct or not.
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revision 1.4    locked by: root;
date: 2014/01/06 00:37:30;  author: root;  state: Exp;  lines: +0 -9
Code for processing client is optimized.
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revision 1.3
date: 2014/01/04 18:20:04;  author: root;  state: Exp;  lines: +17 -2
Subtract operation added in the processing client.
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revision 1.2
date: 2014/01/04 16:38:24;  author: root;  state: Exp;  lines: +1 -1
syntax error present.
bug fixed.
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revision 1.1
date: 2014/01/04 16:18:32;  author: root;  state: Exp;
Initial revision
=============================================================================

 
RCS file: server_process.c,v
Working file: server_process.c
head: 1.9
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total revisions: 9;    selected revisions: 9
description:
Child process is created using fork() system call.
execl() is done in the child process and the file descriptor to write to pipe are passed.
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revision 1.9    locked by: root;
date: 2014/01/06 00:44:03;  author: root;  state: Exp;  lines: +20 -22
Code is optimized by reducing the number of redundant statements.
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revision 1.8
date: 2014/01/04 17:57:59;  author: root;  state: Exp;  lines: +8 -2
Logical error:Only one file descriptor is passed to the requesting client.
Bug fixed successfully result is coming as expected for the add operation.
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revision 1.7
date: 2014/01/04 17:24:38;  author: root;  state: Exp;  lines: +8 -4
Escape sequence \n is added to make the code more readable.
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revision 1.6
date: 2014/01/04 17:19:10;  author: root;  state: Exp;  lines: +8 -3
Segmentation fault was occurring earlier because of absence of & operator.
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revision 1.5
date: 2014/01/04 16:58:34;  author: root;  state: Exp;  lines: +6 -7
syntax error:Missing semicolon.
error fixed.
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revision 1.4
date: 2014/01/04 16:55:06;  author: root;  state: Exp;  lines: +7 -5
Requesting client is working properly to some extent but the
control is not coming back to the parent.
Logical error.
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revision 1.3
date: 2014/01/04 16:22:44;  author: root;  state: Exp;  lines: +11 -5
File descriptors are passed to processing clients.
A new child is created using fork() and then execl() is done.
The result is read by the server from the pipe.
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revision 1.2
date: 2014/01/03 18:47:55;  author: root;  state: Exp;  lines: +61 -4
Logical error is fixed.
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revision 1.1
date: 2014/01/03 16:22:40;  author: root;  state: Exp;
Initial revision
=============================================================================

log file of init function

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1.1
date    2014.01.04.11.18.09;    author root;    state Exp;
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desc
@this is the source code of init function for initialization in device driver
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1.1
log
@Initial revision
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log file of exit function

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1.1
date    2014.01.04.11.18.43;    author root;    state Exp;
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desc
@this is the source of exit function for clean up the device driver
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1.1
log
@Initial revision

Implemented the insertion and registration of basic device driver.

Log file for initialization:

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1.2
date    2014.01.04.16.35.51;    author root;    state Exp;
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1.1
date    2014.01.04.16.04.11;    author root;    state Exp;
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desc
@This file contains source code for initialization of drivers while we insert our driver to kernel.
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1.2
log
@The error are removed for initialisation file and the registration of simple driver is implemented.
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Log file for clean_up:

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1.2
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1.1
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desc
@This file contains source code for cleanup  of drivers while we insert our driver to kernel.
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1.2
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@The error are removed for exit file and the registration of simple driver is implemented.
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RCS file: SIGINTsignal.c,v
Working file: SIGINTsignal.c
head: 1.5
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total revisions: 5;    selected revisions: 5
description:
Program to understand the functionality of signal.
In this program,signal is received and caught by the system handler.
User is intimated for the signal generated by the kernel.
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revision 1.5    locked by: root;
date: 2014/01/02 19:09:21;  author: root;  state: Exp;  lines: +3 -0
SIGKILL signal is added to test the functionality.
Ensuring that it is a special type of a message.
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revision 1.4
date: 2014/01/02 19:02:05;  author: root;  state: Exp;  lines: +4 -0
SIGQUIT signal is also added and handler function is changed.
It will display an appropriate message for the signal generated.
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revision 1.3
date: 2014/01/02 18:57:39;  author: root;  state: Exp;  lines: +1 -0
sleep() system call is introduced so that the message can be read easily.
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revision 1.2
date: 2014/01/02 18:56:20;  author: root;  state: Exp;  lines: +1 -0
Header file for supporting the signal system call is added to the program.
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revision 1.1
date: 2014/01/02 18:55:22;  author: root;  state: Exp;
Initial revision
=============================================================================