Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Use while loop to read file and use ${file} for both filename input into awk and as string to print
Top Forums Shell Programming and Scripting Use while loop to read file and use ${file} for both filename input into awk and as string to print Post 302997587 by rovf on Wednesday 17th of May 2017 03:18:54 AM
Old 05-17-2017
You didn't say which awk you are using. If your awk is linked to nawk or gawk, there is also an alternative to the solution posted by Don Cragun, in that you could export your shell variable (so that it becomes an environment variable) and use awk's built-in ENVIRON array to access it. If you follow this route, I strongly recommend to write the variable in all-uppercase.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Awk+Grep Input file needs to match a column and print the entire line

I'm having problems since few days ago, and i'm not able to make it works with a simple awk+grep script (or other way to do this). For example, i have a input file1.txt: cat inputfile1.txt 218299910417 1172051195 1172070231 1172073514 1183135117 1183135118 1183135119 1281440202 ... (3 Replies)
Discussion started by: poliver
3 Replies

2. Shell Programming and Scripting

Awk to print on condition in input file

I need only those records which has $2 equal to "DEF" independent of case (i.e upper or lower) nawk -F"," '$2 ~ //{print $0}' file This returns 3rd record also which i dont want I tried this but this doesnt work as expected. nawk -F"," '$2 == ""{print $0}' file i dont... (3 Replies)
Discussion started by: pinnacle
3 Replies

3. Shell Programming and Scripting

Print only Filename based on given String on file name

Hi, I am new to this unix world. Any ways, I would like to write a shell script that can print the file name. Ex : directory will have 5 files with different name.No matter what are contents are. Now I need to find the file which will have particular name (sub string ).Please do not... (5 Replies)
Discussion started by: akb2010
5 Replies

4. Shell Programming and Scripting

Take input from read and place it a string in another file

Hi, This is most likely a dumb question but I could not find answer to it elsewhere. I'm building a simple menu with case /esac and want to read user's input: Please enter XYZ ; read XYZ How do I take the value of XYZ and insert it as a variable $XYZ in file file.txt ? I may need to... (9 Replies)
Discussion started by: svetoslav_sj
9 Replies

5. Shell Programming and Scripting

Using awk instead of while loop to read file

Hello, I have a huge file, I am currently using while loop to read and do some calculation on it, but it is taking a lot of time. I want to use AWK to read and do those calculations. Please suggest. currently doing: cat input2 | while read var1 do num=`echo $var1 | awk... (6 Replies)
Discussion started by: anand2308
6 Replies

6. Shell Programming and Scripting

For loop inside awk to read and print contents of files

Hello, I have a set of files Xfile0001 - Xfile0021, and the content of this files (one at a time) needs to be printed between some line (lines start with word "Generated") that I am extracting from another file called file7.txt and all the output goes into output.txt. First I tried creating a for... (5 Replies)
Discussion started by: jaldo0805
5 Replies

7. Shell Programming and Scripting

Read input file with in awk script not through command line

Hi All, Do we know how to read input file within awk script and send output toanother log file. All this needs to be in awk script, not in command line. I am running this awk through crontab. Cat my.awk #!/bin/awk -f function test(var){ some code} { } END { print"test code" } (5 Replies)
Discussion started by: random_thoughts
5 Replies

8. Shell Programming and Scripting

Failure using regex with awk in 'while read file' loop

I have a file1.txt with several 100k lines, each of which has a column 9 containing one of 60 "label" identifiers. Using an labels.txt file containing a list of labels, I'd like to extract 200 random lines from file1.txt for each of the labels in index.txt. Using a contrived mini-example: $ cat... (8 Replies)
Discussion started by: pathunkathunk
8 Replies

9. UNIX for Beginners Questions & Answers

How to make a loop to read the input from a file part by part?

Hi All, We've a VDI infrastructure in AWS (AWS workspaces) and we're planning to automate the process of provisioning workspaces. Instead of going to GUI console, and launching workspaces by selecting individual users is little time consuming. Thus, I want to create them in bunches from AWS CLI... (6 Replies)
Discussion started by: arun_adm
6 Replies

10. Shell Programming and Scripting

Read file input in while loop does not work on AIX system

I'm working on Aix 6.1 and using ksh shell. The below works fine on Linux bash or ksh shell . while IFS= read -r dirpath ; do echo "Hi" done <<<"$var" However, any such while loop that reads the input from file or variable using <<< fails on Aix system with the below error: Below... (2 Replies)
Discussion started by: mohtashims
2 Replies

LEARN ABOUT SUNOS

ucblinks

ucblinks(1B)					     SunOS/BSD Compatibility Package Commands					      ucblinks(1B)

NAME

       ucblinks - adds /dev entries to give SunOS 4.x compatible names to SunOS 5.x devices

SYNOPSIS

       /usr/ucb/ucblinks [-e rulebase] [-r rootdir]

DESCRIPTION

       ucblinks  creates symbolic links under the /dev directory for devices whose SunOS 5.x names differ from their SunOS 4.x names. Where possi-
       ble, these symbolic links point to the device's SunOS 5.x name rather than to the actual /devices entry.

       ucblinks does not remove unneeded compatibility links; these must be removed by hand.

       ucblinks should be called each time the system is reconfiguration-booted, after any new SunOS 5.x links that are needed have been  created,
       since the reconfiguration may have resulted in more compatibility names being needed.

       In  releases prior to SunOS 5.4, ucblinks used a  nawk rule-base to construct the SunOS 4.x compatible names. ucblinks no longer uses  nawk
       for the default operation, although  nawk rule-bases can still be specifed with the -e option.  The  nawk rule-base equivalent to the SunOS
       5.4 default operation can be found in /usr/ucblib/ucblinks.awk.

OPTIONS

       -e rulebase     Specify rulebase as the file containing nawk(1) pattern-action statements.

       -r rootdir      Specify rootdir as the directory under which dev and devices will be found, rather than the standard root directory /.

FILES

       /usr/ucblib/ucblinks.awk        sample rule-base for compatibility links

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       devlinks(1M), disks(1M), ports(1M), tapes(1M), attributes(5)

SunOS 5.10							    13 Apr 1994 						      ucblinks(1B)
All times are GMT -4. The time now is 04:50 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy