Control Characters


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Control Characters
# 1  
Old 06-21-2011
Data Control Characters

Can somebody please help me with the query. ?

I want a part of program of which should look for control characters in the flat file , when it finds it, displaying message that Control Characters found..!

Please help me
# 2  
Old 06-21-2011
Try this Insert ^M by using ^v and ^M
Code:
 
perl -0ne 'print "Control Chars found in $ARGV" if /^M/g' txt.txt

This User Gave Thanks to getmmg For This Post:
# 3  
Old 06-21-2011
Use the [:cntrl:] character class with any tool that supports regular expressions.

Regards,
Alister
These 3 Users Gave Thanks to alister For This Post:
# 4  
Old 06-22-2011
Question

Thanks Alister.. I am actually beginner in scripting.Smilie. so could you please help me writing the block which shill i do the required work ?Smilie
# 5  
Old 06-22-2011
Show your attempts first, and where you're stuck. Read the man pages for grep, awk, ... Otherwise we'd have to assume this is some kind of homework, and any help cheating is prohibited.
# 6  
Old 06-28-2011
I tried that part but its not working..
# 7  
Old 06-28-2011
Quote:
I want a part of program of which should look for control characters in the flat file , when it finds it, displaying message that Control Characters found..!
The line terminator for a normal unix text file is ctrl/J (linefeed).
Are these text files or something else?
Can you give an example?
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Control Characters

Hallo Team, I am trying to get rid of the dollar sign. I managed to remove all the other special characters but i am struggling with this one. -bash-3.2$ cat -e missing_revenue_20141112.csv|less|head BW0522168531211141180935668@196.23.110.141$ BW092218784121114-370120610@196.23.110.141$... (4 Replies)
Discussion started by: kekanap
4 Replies

2. UNIX for Dummies Questions & Answers

Control characters in UNIX

Hi, My files are showing some control characters in vi editor ^M ^@ and somtimes ^H I removed ^M with %s/^M//g command but how to represent ^@ and ^H e.g. for ^M it is hold ctrl then v and m.. Please help.. I am very new to unix.. (7 Replies)
Discussion started by: prabhat.diwaker
7 Replies

3. Shell Programming and Scripting

Control characters -weird problem

I am using Korn shell on Linux 2.6x platform , and I am suing the following code to capture the lines which contain CONTROL CHARACTERS in my file : awk '/]/ {print NR}' EROLLMENT_INPUT.txt The problem is that this code shows the file has control characters when the file is in folder A ,... (2 Replies)
Discussion started by: kumarjt
2 Replies

4. Shell Programming and Scripting

sed replacing specific characters and control characters by escaping

sed -e "s// /g" old.txt > new.txt While I do know some control characters need to be escaped, can normal characters also be escaped and still work the same way? Basically I do not know all control characters that have a special meaning, for example, ?, ., % have a meaning and have to be escaped... (11 Replies)
Discussion started by: ijustneeda
11 Replies

5. Shell Programming and Scripting

Urgent : Control Characters

Can somebody please help me with the query. ? I want a part of program of which should look for control characters in the flat file , when it finds it, displaying message that Control Characters found..! Please help me (1 Reply)
Discussion started by: iamnoone
1 Replies

6. Shell Programming and Scripting

screen control characters

Hi, Can anyone help me with controlling the cursor position from a shell script. Things like moving left,right,up,down etc Anyone have any ideas? (2 Replies)
Discussion started by: ajcannon
2 Replies

7. Shell Programming and Scripting

how to replace control characters using sed?

How can I use sed to replace a ctrl character such as 'new line' (\0a) to something else? Or any other good command can do this job? Thanks, Hillxy (5 Replies)
Discussion started by: hillxy
5 Replies

8. UNIX for Dummies Questions & Answers

Remove control characters

Hi, When I do a man and save it into a file, I end up getting a lot of control characters. How can I remove them?? I tried this: /1,$ s/^H//g But I get an error saying "no previous regular expression". Can someone help me with this. Thanks, Aravind (5 Replies)
Discussion started by: aravind_mg
5 Replies

9. UNIX for Dummies Questions & Answers

getting rid of control characters

how can i get rid of the control characters , ex. ^M, ^G, in a file? thanks... (2 Replies)
Discussion started by: apalex
2 Replies

10. UNIX for Dummies Questions & Answers

printing control characters

using c-shell, does anyone know how to send control characters to the printer before the job? I need to set a printer to print in condensed mode HELP (1 Reply)
Discussion started by: mglinsk
1 Replies
Login or Register to Ask a Question