Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to filter only comments while reading a file including line break characters.
Top Forums Shell Programming and Scripting How to filter only comments while reading a file including line break characters. Post 302418239 by Franklin52 on Monday 3rd of May 2010 03:24:14 PM
Old 05-03-2010
Quote:
Originally Posted by kchinnam
Code:
$> awk 'NF && $1 != "#"{sub("#.*","");print}' input.txt
awk: syntax error near line 1
awk: bailing out near line 1

I needed to use xpg4 version of awk on my Solaris8 box.

Code:
$>/usr/xpg4/bin/awk 'NF && $1 != "#"{sub("#.*","");print}' input.txt
one="1111111" 
two="22222222"
        three=333333333

Frank That is great., Its working..
Do you have any ideas to trim prefix spaces also?

I am not sure what we are getting by added complexity.. here.. Dan Please explain what the intent is ..

Code:
$>/usr/xpg4/bin/awk '$1!="#" && NF{gsub(/^ */,"",$0);sub("#.*",x);print}' input.txt
one="1111111" 
two="22222222"
        three=333333333

Again,, Please give me ideas to trim space characters at the beginning of lines. I know something line
Code:
cat input.txt | awk '{print $1}'

can do that,, but is there a more elegant one ?
Try:
Code:
awk 'NF && $1 != "#"{sub("#.*","");sub(/^ */,"");print}' file

 

10 More Discussions You Might Find Interesting

1. Programming

Reading special characters while converting sequential file to line sequential

We have to convert a sequential file to a 80 char line sequential file (HP UX platform).The sequential file contains special characters. which after conversion of the file to line sequential are getting coverted into "new line" or "tab" and file is getting distorted. Is there any way to read these... (2 Replies)
Discussion started by: Rajeshsu
2 Replies

2. Shell Programming and Scripting

Reading a path (including ref to shell variable) from file

Hi! 1. I have a parameter file containing path to log files. For this example both paths are the same, one is stated directly and the second using env variables. /oracle/admin/orcl/bdump/:atlas:trc:N ${ORACLE_BASE}/admin/${ORACLE_SID}/bdump/:${ORACLE_SID}:trc:N 2. I try to parse the path... (1 Reply)
Discussion started by: lojzev
1 Replies

3. Shell Programming and Scripting

Replacing characters in file with line break

Hi, Apologies if this has been asked before, but I searched and was not able to find an answer. It's probably a simple question to answer for those of you with some experience, though... I have a relatively long string where tokens are separated by the colon (':') character. Let's say the... (10 Replies)
Discussion started by: johnemb
10 Replies

4. UNIX for Dummies Questions & Answers

Reading a line including spaces

Hi All, I have a script that reads a file and echo it back to std out. Test.txt 1aaaaaaaaaaa . The script is ReadLine.sh #!/bin/ksh cat $1 | while read file do echo $file done I invoke the script as ReadLine.sh Test.txt The output that I get is (1 Reply)
Discussion started by: aksarben
1 Replies

5. Shell Programming and Scripting

Break line after last "/" if length > X characters

Hello. I am a french newbie in unix shell scripting (sorry if my english speaking is wrong). I have a file with path and filenames in it. I want to limit the number of characters on each line and break the line if necessary. But the "break" should occur after a slash caracter "/". Example of... (9 Replies)
Discussion started by: SportBilly
9 Replies

6. Shell Programming and Scripting

filter record from a file reading another file

Hi, I want to filter record from a file if the records in the second column matches the data in another file. I tried the below awk command but it filters the records in the filter file. I want the opposite, to include only the records in the filter file. I tried this: awk -F'|'... (8 Replies)
Discussion started by: gpaulose
8 Replies

7. Shell Programming and Scripting

[Solved] Problem in reading a file line by line till it reaches a white line

So, I want to read line-by-line a text file with unknown number of files.... So: a=1 b=1 while ; do b=`sed -n '$ap' test` a=`expr $a + 1` $here do something with b etc done the problem is that sed does not seem to recognise the $a, even when trying sed -n ' $a p' So, I cannot read... (3 Replies)
Discussion started by: hakermania
3 Replies

8. Shell Programming and Scripting

Add line break for each line in a file

I cannot seem to get this to work.. I have a file which has about 100 lines, and there is no end of line (line break \n) at the end of each line, and this is causing problem when i paste them into an application. the file looks like this this is a test that is a test balblblablblhblbha... (1 Reply)
Discussion started by: fedora
1 Replies

9. UNIX for Dummies Questions & Answers

add a string to a file without line break

I searched and found "echo -n" and "printf" are solution for this, but they are not here: $ echo "hello" >> test $ cat test hello $ echo -n "world" >> test $ cat test hello world $ echo -n " seriously?" >> test $ cat test hello world seriously? This is not successful... (15 Replies)
Discussion started by: stunn3r
15 Replies

10. UNIX for Beginners Questions & Answers

Including Hash / in sed command filter

Hello All, I want to print data in between two lines in a file sample.txt through more or cat command on the screen. For that I am using below sed command to give the BEGIN and END text. Content of sample.txt server01:~ # cat /proc/mdstat Hello this is a text message 1 Hello this is a... (5 Replies)
Discussion started by: Xtreme
5 Replies

LEARN ABOUT MOJAVE

locale::codes::langfam

Locale::Codes::LangFam(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangFam(3pm)

NAME

       Locale::Codes::LangFam - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangFam;

	  $lext = code2langfam('apa');		       # $lext gets 'Apache languages'
	  $code = langfam2code('Apache languages');    # $code gets 'apa'

	  @codes   = all_langfam_codes();
	  @names   = all_langfam_names();

DESCRIPTION

       The "Locale::Codes::LangFam" module provides access to standard codes used for identifying language families, such as those as defined in
       ISO 639-5.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639-5
       language family codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language families. A code set may be specified using either a name, or a
       constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langfam('apa','alpha');
	  $lext = code2langfam('apa',LOCALE_LANGFAM_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from ISO 639-5 such as 'apa' for Apache languages.

	   This is the default code set.

ROUTINES

       code2langfam ( CODE [,CODESET] )
       langfam2code ( NAME [,CODESET] )
       langfam_code2code ( CODE ,CODESET ,CODESET2 )
       all_langfam_codes ( [CODESET] )
       all_langfam_names ( [CODESET] )
       Locale::Codes::LangFam::rename_langfam  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangFam::add_langfam  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangFam::delete_langfam  ( CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangFam::delete_langfam_alias  ( NAME )
       Locale::Codes::LangFam::rename_langfam_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::delete_langfam_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.loc.gov/standards/iso639-5/id.php
	   ISO 639-5 .

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.18.2							    2013-11-04					       Locale::Codes::LangFam(3pm)
All times are GMT -4. The time now is 07:59 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy