Login or Register to Ask a Question and Join Our Community


Where can I find the program that runs the -wc command?


 
Thread Tools Search this Thread
Top Forums UNIX for Beginners Questions & Answers Where can I find the program that runs the -wc command?
# 1  
Old 04-17-2019
Where can I find the program that runs the -wc command?

Hey guys, I was wondering. When I enter a command in the terminal -wcl for a word count, where is that program located in the kernel?
# 2  
Old 04-17-2019
wc is not located in the kernel.

wc and similar shell builtins and other similar programs run in the shell, not the kernel.
# 3  
Old 04-17-2019
Ah I see so where might I go to look at the code itself, any idea? Would it even be possible?
# 4  
Old 04-17-2019
Hi Neo...

More to the point why is the OP interested in entering kernel space, (ring 0), at all?

@Circuits:
If you are running Linux you have two methods /dev/<device> for _direct_, (term used loosely), HW access and 'int 80' for assembly code...
Linux System Call Table
# 5  
Old 04-17-2019
Quote:
Originally Posted by Circuits
Ah I see so where might I go to look at the code itself, any idea? Would it even be possible?
You mean the code for wc ?

The start to the answer for that question depends on the operation system you are using / interested in.
# 6  
Old 04-17-2019
Yes wc, I am using Ubuntu 18.04.
# 7  
Old 04-17-2019
For Ubuntu, you can read the source code directly yourself.

For example, you can pull it down and search it using, like so:

Code:
apt-get source linux-source-3.2.0

or, you can go to the Ubuntu archive here:

Code:
http://archive.ubuntu.com/ubuntu/

Enjoy!
This User Gave Thanks to Neo For This Post:
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to return a message after command runs?

I have a script like this: echo "enter filername in lowercase" read -e filername exec 2>&1 echo "type the start date in format MM/DD/YYYY" read -e startdate exec 2>&1 echo "enter the end date in format MM/DD/YYYY" ... (2 Replies)
Discussion started by: newbie2010
2 Replies

2. Homework & Coursework Questions

create a program that runs two processes linked oven

I need help program in C... :create a program that runs two processes linked oven (1 Reply)
Discussion started by: gizmo16
1 Replies

3. Shell Programming and Scripting

crontab runs only one line in iterated program

I have a crontab as below: PATH=/usr/local/sbin:/bin/:..... etc etc 0 8 * * * /home/user/jobs/poll.sh 2>/dev/null 1>/dev/null Now the script poll.sh is called at correct time and executes. This is how poll.sh looks like #!/bin/bash... (2 Replies)
Discussion started by: chakrapani
2 Replies

4. Programming

getting Segmentation Fault (core dumped) error but Program runs fine.

i am executing following program int main() { char str; FILE * fp; int i=0; ... (4 Replies)
Discussion started by: bhavesh.sapra
4 Replies

5. Shell Programming and Scripting

How long screen command runs?

Does screen command run forever? Suppose I have following command inserted at my putty shell followed by screen # screen # export JAVA_HOME=/usr/java/jdk1.6.0_21 # export ANT_HOME=/usr/ant # export PATH=$PATH:$JAVA_HOME/bin:$ANT_HOME/bin # export... (0 Replies)
Discussion started by: ninadgac
0 Replies

6. Shell Programming and Scripting

command runs, no output

I have a script that searches for specific information from log files. #!/bin/sh sed -n '/*C/,/END/p' /sn/log/OMlog* > crit.out sed -n '/REPT INITIALIZATION/,/err:/p' /sn/log/OMlog* > switchcc.out ./start.awk /sn/log/OMlog* > ARs.out ./end.awk /sn/log/OMlog* > ARe.out cat crit.out... (1 Reply)
Discussion started by: grinds
1 Replies

7. UNIX for Advanced & Expert Users

Minutes a program runs.

I have a ksh script that executes a program with a predetermined timeout in minutes. If the program takes longer then the timeout then it still completes with a return code of 0. :confused: I would like to determine how long the program ran. Then if it takes longer than the timeout I would... (7 Replies)
Discussion started by: 2dumb
7 Replies

8. Shell Programming and Scripting

Check if a program runs on unix

Hi guys, I had a question last week where I asked how I check from a website hosted on windows if a process is running on on of our unix servers. Vino and Shell Life kindly replied with a perl script: if qm') -gt 0 ] ; then echo "Site is up" else echo "Site is down." # start the... (1 Reply)
Discussion started by: drchris
1 Replies

9. HP-UX

why does my program runs in conflicting mode?

my pragram runs with 3 threads, 2 work threads, one main thread. the 2 work threads run with the same mode and the same code. but now, one of the work thread can't work, and it uses the cpu more than 80%, sometimes uses 100% cpu resource. the another work thread work well. when I viewed the HP... (2 Replies)
Discussion started by: happylife365
2 Replies
Login or Register to Ask a Question

Featured Tech Videos