Sponsored Content
Top Forums Programming which function copies data from user to kernel mode Post 302431656 by rupeshkp728 on Tuesday 22nd of June 2010 11:56:46 AM
Old 06-22-2010
thanks jim for the reply.
when a write request is issued from an application in user mode then while transitioning from user to kernel mode after the software interrupt is generated the buffer data is copied from user to kernel mode
actually I want which function does this copying
 

10 More Discussions You Might Find Interesting

1. Filesystems, Disks and Memory

k_trap - kernel mode trap type 0x0000000E

HELP is urgently required, I run on SCO Unix 3 and this is the panic message that I get every time that I reboot 10U k_trap - kernel mode trap type 0x0000000E I have checked the swap already having the following results: #swap -l path dev swaplo blocks free... (3 Replies)
Discussion started by: alex_slb
3 Replies

2. SCO

unexpected trap in kernel mode

hi, I am trying to install sco openserver 5.0.4 on an old system. However, l was not able to proceed after putting the bootstr l have this panic message of PANIC: K_trap - kernel mode trap tupe 0x00000006 will someone kindly help to decode this error kayode (1 Reply)
Discussion started by: kayode
1 Replies

3. Programming

Aplication user and kernel mode (data access)

Hi all, I am trying to setup a program to use a device driver and am confusing buffer access between User and Kernel mode. I think all applications running in User space have to communicate with the device drivers using io control calls and then have some functions called back from the driver... (1 Reply)
Discussion started by: Brendan Kennedy
1 Replies

4. UNIX for Dummies Questions & Answers

Kernel Mode

Hi all i have queastion. Can anybody pease help me what is user mode and kernel mode and the term "De-mountable volumes" means? Thanks Palash (2 Replies)
Discussion started by: palash2k
2 Replies

5. Shell Programming and Scripting

MODE function in awk

Hello, Can someone pls help me with some statistical calculation in awk In excel there is a statistical function called "Mode". How Mode works: MODE returns the most frequently occurring, or repetitive, value in array or range. Eg if we have 5 numbers in 5 different columns... (12 Replies)
Discussion started by: Needhelp2
12 Replies

6. SCO

PANIC: k_trap - Kernel mode trap type 0x0000000E

Hi, i'm another question: I'm a directory /usr/data on my server sco unix 5.0.5: # du /usr/data 4386948 /usr/data I'm tried to connect to ftp directory /usr/data to this server and: PANIC: k_trap - Kernel mode trap type 0x0000000E Cannot dump 262040 pages to dumpdev hd(1/41):space... (3 Replies)
Discussion started by: sebpes
3 Replies

7. Programming

Execute code in kernel mode.

Hi everyone. I would like to hook a system function (gettimeofday) to modify it. I guess I'll need kernel mode to do that. By the way, how could I do it (c++ or c)? I want to modify that function for one process which I know the PID. So I need to return my own value for that PID and real value... (29 Replies)
Discussion started by: lilezek
29 Replies

8. Programming

HELP!!: CPU resource allocation between kernel modules and user mode process

Hi,all: I run my program which consists of one kernel module and one user mode process on a dual core server. The problem here is the kernel module consumes 100% of one core while the user mode process only consumes 10% of the other core, is there any solution that I can assign some computing... (1 Reply)
Discussion started by: neyshule
1 Replies

9. UNIX for Dummies Questions & Answers

Kernel Stack vs User Mode Stack

Hi, I am new to the linux kernel development area. I want to know what is the difference between kernel mode stack and user mode stack? Does each process has a user mode stack and a kernel mode stack?? Or Each process has a user mode stack and there is only one kernel mode stack that is shared by... (4 Replies)
Discussion started by: saurabhkoar
4 Replies

10. UNIX for Advanced & Expert Users

Precaution to access user mode buffers from kernel

When accessing a user mode buffers from kernel space drivers what precautions must we take and how those precautions need to be implemented? (0 Replies)
Discussion started by: rupeshkp728
0 Replies
WRITE(1)						    BSD General Commands Manual 						  WRITE(1)

NAME
write -- send a message to another user SYNOPSIS
write user [ttyname] DESCRIPTION
The write utility allows you to communicate with other users, by copying lines from your terminal to theirs. When you run the write command, the user you are writing to gets a message of the form: Message from yourname@yourhost on yourtty at hh:mm ... Any further lines you enter will be copied to the specified user's terminal. If the other user wants to reply, they must run write as well. When you are done, type an end-of-file or interrupt character. The other user will see the message 'EOF' indicating that the conversation is over. You can prevent people (other than the super-user) from writing to you with the mesg(1) command. If the user you want to write to is logged in on more than one terminal, you can specify which terminal to write to by specifying the termi- nal name as the second operand to the write command. Alternatively, you can let write select one of the terminals - it will pick the one with the shortest idle time. This is so that if the user is logged in at work and also dialed up from home, the message will go to the right place. The traditional protocol for writing to someone is that the string '-o', either at the end of a line or on a line by itself, means that it's the other person's turn to talk. The string 'oo' means that the person believes the conversation to be over. SEE ALSO
mesg(1), talk(1), wall(1), who(1) HISTORY
A write command appeared in Version 1 AT&T UNIX. BSD
June 6, 1993 BSD
All times are GMT -4. The time now is 01:50 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy