Sponsored Content
Top Forums UNIX for Beginners Questions & Answers awk Command to add Carriage Return and Line Feed Post 303024743 by Scrutinizer on Tuesday 16th of October 2018 06:20:42 AM
Old 10-16-2018
Quote:
Originally Posted by Don Cragun
Neither awk nor sed have defined behavior according to the standards if the file being processed is not a text file. If an input file contains any characters and the last character in the file is not a <newline> character, that input file is not a text file. (So the code Scrutinizer suggested also depends on GNU extensions to awk that are not portable and not required by the standards.)
[..]
Hi Don, I see where you are going, I may have read the question wrong, I interpreted it as "add a carriage return is it is missing at the end of a line (which ends in linefeed)". So for that, my suggestion does not use extensions - GNU or otherwise - to the standard. I did not mean to also correct a missing newline at the end of the file.

It may be good to note that even though the latter case is not defined by the standards, every implementation of awk on every OS I know does read the unterminated last line and adds the newline at the end of the file, so IMO this behavior cannot be labeled as a GNU extension.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

carriage return/line feeds

Hello, I have a file that has got carriage returns in it and I want to take them out. Anyone know how I can do this in a ksh? thanks (4 Replies)
Discussion started by: pitstop
4 Replies

2. Shell Programming and Scripting

Removing Carriage Return and or line feed from a file

Hello I'm trying to write a shell script which can remove a carriage return and/or line feed from a file, so the resulting file all ends up on one line. So, I begin with a file like this text in file!<CR> line two!<CR> line three!<CR> END!<CR> And I want to end up with a file... (1 Reply)
Discussion started by: tbone231
1 Replies

3. Shell Programming and Scripting

How to insert carriage return before line feed?

I am doing some edi where translations had to be run on unix. Generally when I run the translations on windows, the output file has both carriage returns and line feed where as when ran on unix will have only line feed. I need to insert carriage return before the line feed. Is there some tool... (2 Replies)
Discussion started by: huey ing
2 Replies

4. UNIX for Dummies Questions & Answers

To remove carriage return between the line

Hi, I have a situation where I need to remove the carriage return between the lines. For.eg. The input file: 1,ad,"adc sdfd",edf 2,asd,"def fde",asd The output file should be 1,ad,adc sdfd,edf 2,asd,def fde,asd Thanks Shash (5 Replies)
Discussion started by: shash
5 Replies

5. Shell Programming and Scripting

Insert a line including Variable & Carriage Return / sed command as Variable

I want to instert Category:XXXXX into the 2. line something like this should work, but I have somewhere the wrong sytanx. something with the linebreak goes wrong: sed "2i\\${n}Category:$cat\n" Sample: Titel Blahh Blahh abllk sdhsd sjdhf Blahh Blah Blahh Blahh Should look like... (2 Replies)
Discussion started by: lowmaster
2 Replies

6. Programming

Carriage return or line feed issues

I keep running into the same problem with the following script. Every time it prints the carrage (line feed) char when I test. I believe that the issue is in the group by but I do not see it. The code is as follows. SET FEED OFF SET ECHO OFF SET HEADING OFF SET LINESIZE 1000 SET PAGESIZE... (1 Reply)
Discussion started by: sherrod6970
1 Replies

7. Shell Programming and Scripting

Why sed command deletes last line in a file if no carriage return?

Hi I am using sed command to make SCORE=somevalue to SCORE=blank in a file. Please see the attached lastline.txt file. After executing the below command on the file, it removes the last line. cat lastline.txt | sed 's/SCORE=.*$/SCORE=/g' > newfile.txt Why does sed command remove the... (3 Replies)
Discussion started by: ashok.k
3 Replies

8. Shell Programming and Scripting

refine awk command in replacing carriage return

Hi, need your help in below,I have 4 types of file need to be processed so that it will replace carriage return in Remarks column with <:::> Remarks column position may varies in different types of file. sample file: col1|col2|col3|col4|col5|col6|col7|Remarks|col9|col10... (8 Replies)
Discussion started by: agathaeleanor
8 Replies

9. Shell Programming and Scripting

line carriage return characters

Hi, I would like to insert the line carriage retrun characters on each line. (2 Replies)
Discussion started by: koti_rama
2 Replies

10. Shell Programming and Scripting

Losing carriage return (X0D) after running awk command

Hi Forum. I'm running the following awk command to extract the suffix value (pos 38) from the "AM00" record and append to the end of the "AM01" record. awk 'substr($0,13,4)=="AM00" {SUFFIX = substr($0,38,2)} substr($0,13,4)=="AM01" {$0 = $0 SUFFIX} 1' before.txt > after.txt Before.txt:... (2 Replies)
Discussion started by: pchang
2 Replies
asa(1)							      General Commands Manual							    asa(1)

NAME
asa - Interprets carriage-control characters SYNOPSIS
asa [file...] STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: asa: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None OPERANDS
The pathname of a file to be read. If this parameter is omitted, standard input is read. DESCRIPTION
The asa command writes its input files to standard output, mapping carriage-control characters from the text files to line-printer control sequences. The first character of every input line is removed and, depending on the character removed, an action performed on that character and the rest of the line. If the character removed is: The rest of the line is output without change. A newline character is output, followed by the rest of the input line. A form-feed character is output, followed by the rest of the input line. The newline character of the previ- ous line is replaced with a carriage-return character, which is output, followed by the rest of the input line. If + is the first character in the input, + has the same effect as the space character. [Tru64 UNIX] The character is output, followed by the rest of the input line. EXIT STATUS
The following exit values are returned: Successful completion. An error occurred. EXAMPLES
To view a file (created by a program using FORTRAN-style carriage control characters) on a terminal: asa file To format the FORTRAN output of a.out and direct it to the printer: a.out | asa | lp ENVIRONMENT VARIABLES
The following environment variables affect the execution of asa: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari- ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multi-byte characters in arguments and input files). Determines the locale for the format and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES. SEE ALSO
Commands: lp(1) Standards: standards(5) asa(1)
All times are GMT -4. The time now is 04:03 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy