Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

finding junk characters

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting finding junk characters
# 1  
Old 06-25-2010
finding junk characters
Hi,

Is there anyway to find the junk characters in a file.Consider the file has data as given below:

Code:
123|abc^M|Doctor^C #record 1
234|def|Med             #record 2
345|dfg^C|Wrong^V  #record 3

The junk characters are highlighted and this is a pipe delimited file.
Is there anyway to find the records with junk characters and move it to a file and good records to a separate file.

Thanks in advance
Last edited by Scott; 06-25-2010 at 08:34 AM.. Reason: Code tags
# 2  
Old 06-25-2010
Code:
grep - v "\^" input_file

# 3  
Old 06-25-2010
Hi,

That doesnt seem to work. These are control characters which are generally not visible in VI mode.
# 4  
Old 06-25-2010
If you know which special characters (like #,$,%) are permited for those lines, then you could use this:
Code:
awk '!/[^a-zA-Z|#$%]/' file

Add where marked any characters that are not "a-z" but are permited to be part of field's string.

Other way is:
Code:
awk '!/[[:cntrl:]]/' file

But it might not work with all AWK implementations.
# 5  
Old 06-25-2010
Further to bartus11. Two passes to achive the required result.

Code:
awk '!/[[:cntrl:]]/' filename > good_data
awk '/[[:cntrl:]]/' filename > bad_data

# 6  
Old 06-25-2010
Hi,

@methyl : It is not working.
The sample data is this:
15|Jsus
15|Susan

The first record has a special character in it which is actually a junk character ( ascii value is \032) which is invisible.

The above command doesnt catch that as a bad record.
Last edited by ashwin3086; 06-25-2010 at 10:07 AM..
# 7  
Old 06-25-2010
Did you try that?
Code:
awk '!/[^a-zA-Z|#$%]/' file
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Need to remove Junk characters

Hi All, I have a issue that we are getting Junk characters from source and i am not able to load that records to Database. Line breakers Junk Characters (Â and different every time) Japanese Characters Every time I am using grep command and awk -F "\007" to find them and delete that... (1 Reply)
Discussion started by: spradeep86
1 Replies

2. Solaris

Junk characters in Solaris 11

Hi, I rebooted a Solaris 11 box and after that date stamp is coming in junk in almost all directories. root@tstilp05 # ls -l total 112 drwxrwxr-x 9 root sys 19 juin 1 03:10 adm drwxr-xr-x 6 root sys 6 sept. 19 2012 ai drwxr-xr-x 3 root bin ... (3 Replies)
Discussion started by: solaris_1977
3 Replies

3. UNIX for Dummies Questions & Answers

How to remove JUNK characters (FROM�)

Hi I have to remove the junk characters from my file. Please help.. File content : CURITY_CODE_GSD) FROM� DL_CB_SOD_EOD_VALUATION WHERE� ASOF (1 Reply)
Discussion started by: arukuku
1 Replies

4. Shell Programming and Scripting

Junk characters in mailx output

I have script which send a mail with top output. The script look like $ cat health.sh #!/bin/sh maillist="email address" rm /home/rtq1/file top -n 1 | head 15 > file cat file | mailx -s "Daily Health Report from `hostname` ..." "${maillist}" But now i am getting some junk characters along... (1 Reply)
Discussion started by: Renjesh
1 Replies

5. Shell Programming and Scripting

Handling Junk Characters

Urgently ur help is needed. Actually my req is i have an input file, that input file may have junk characters (^M, ^Z) etc... eg: cat file name abc^Z addres name2 msdmskd^Z address2 I want to validate the record and display where exactly this junk character resides. I want to... (3 Replies)
Discussion started by: help_scr_seeker
3 Replies

6. UNIX for Dummies Questions & Answers

how to grep junk characters in a file

hi guys, I am generating a file from datastage (an etl tool). Now the file is having some junk characters like ( Á,L´±,ñ and so on).. I want to use the grep function to figure out all the junk characters and their location. Can somebody help me out in finding it out.. if possible i... (1 Reply)
Discussion started by: mac4rfree
1 Replies

7. Shell Programming and Scripting

Replacing junk characters

Hi, I have a file with data as given below $cat file1 123|abc|345 345|def|567 The first record is good record. The second record has an invisible junk character like \032. I was replace all the occurences of that invisible character with #. I want to do this for a set of... (16 Replies)
Discussion started by: ashwin3086
16 Replies

8. Shell Programming and Scripting

Remove junk characters using Perl

Guys, can you help me in removing the junk character "^S" from the below line using perl Reference Data Not Recognised ^S Where a value is provided by the consuming system, which is not reco Thanks, M.Mohan (1 Reply)
Discussion started by: mohan_xunil
1 Replies

9. Solaris

junk characters in ls -l output in solaris10

Dear all, I have installed Solaris10 in a x86 machine.When the ls -l output is taken,at the Month's place some junk characters appear.Rest everything is fine. Cna somebody help..? thanks :b: (7 Replies)
Discussion started by: ragtechy
7 Replies

10. UNIX for Dummies Questions & Answers

Email ends with Junk Characters

I have written the following code ...to include the Subject, Message Body and Attachment with sendmail. When I send mail from my Unix account to diffrent mail servers like Yahoo , Hotmail etc..I recv the Message Body but there is no newline character at the end of each line.... Also I recv the... (5 Replies)
Discussion started by: Amruta Pitkar
5 Replies
Login or Register to Ask a Question