Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk call in bash function called with arugments not working, something lost in translation?
Top Forums Shell Programming and Scripting awk call in bash function called with arugments not working, something lost in translation? Post 303043600 by LMHmedchem on Saturday 1st of February 2020 01:56:58 PM
Old 02-01-2020
Quote:
Originally Posted by vgersh99
I see a couple of potential issue with this approach.
I still don't understand why you can't use the usual paradigm of passing vars with -v to awk and have to use this somewhat convoluted approach.
Any chance you can attach a sample file?
I will put together a sample directory and post it.

The -v method works for the comments and replace line, no matter if there are special characters or spaces. It is the $look_for line that is the problem. This version of the code does not work. The $look_for line is never found.
Code:
#! /bin/bash

# value determined elsewhere
total_outputs_p1=100
# file being modified
filename='./common_depend/UTILPARAMS.DAT'
# comment lines to ignore
comment_ch="C"
# line being searched for to replace
look_for="      PARAMETER \(SIZEXX = "
# value of replacement line
replace_with="      PARAMETER (SIZEXX = $total_outputs_p1)"

# process file with awk to find $look_for and replace with $replace_with
awk -v comment="$comment_ch" \
    -v find_line="$look_for" \
    -v replace_line="$replace_with" \
' { if( substr($0,1,1) == comment || if( substr($0,1,2) == comment )
       print $0;
    else if($0 ~ find_line)
       print replace_line;
    else
       print $0;
  } ' $filename > tmp
# overwrite original file
mv tmp $filename

If you replace,

else if($0 ~ find_line)

with,

else if($0 ~ / PARAMETER \(SIZEXX = /)

then it will function. This is hard coding specifically for each item to find and so can't be used in a function. I read that the -v option presented difficulties when using characters that need to be escaped and that is when I switched to the temporary environment variables that I read about on a stackexchange post (I think). I don't understand why it works, but not in the function.

I will post some samples in a few minutes. I need another cup of coffee.

LMHmedchem
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Passing global variable to a function which is called by another function

Hi , I have three funcions f1, f2 and f3 . f1 calls f2 and f2 calls f3 . I have a global variable "period" which i want to pass to f3 . Can i pass the variable directly in the definition of f3 ? Pls help . sars (4 Replies)
Discussion started by: sars
4 Replies

2. UNIX for Dummies Questions & Answers

How to call a local function within Awk

Hi, I have the following statement which parses a string for me and prints it out: l_comp="dc000.runksh.test.ksh| $g_sql/dc0000.runksh_test.sql|new.dat|control.ctl" echo $l_comp | awk -F"|" '{ for ( i = 1; i <= NF; i++) { print $i; } } ' Rather then printing the data, I would like to... (5 Replies)
Discussion started by: CAGIRL
5 Replies

3. Shell Programming and Scripting

Bash: how to call function having it's name in variable?

Hello. Looking for a method of modularizing my bash script, I am stuck with such a problem. For example, I have: MODULE_NAME="test" FUNCTION_NAME="run" How do I can a function with name test_run? (4 Replies)
Discussion started by: FractalizeR
4 Replies

4. Infrastructure Monitoring

diffrence between method call and function call in perl

Hello, I have a problem with package and name space. require "/Mehran/DSGateEngineLib/general.pl"; use strict; sub System_Status_Main_Service_Status_Intrusion_Prevention { my %idpstatus; my @result; &General_ReadHash("/var/dsg/idp/settings",\%idpstatus); #print... (4 Replies)
Discussion started by: Zaxon
4 Replies

5. Shell Programming and Scripting

awk , function call problem

#!/bin/bash awk ' function ad(t,r){ return (t+r); } BEGIN{ print ad(5,3); } { print ad(5,3); } ' Doesn't print anything for the last print ad(5,3); (6 Replies)
Discussion started by: cola
6 Replies

6. Shell Programming and Scripting

Return a value from called function to the calling function

I have two scripts. script1.sh looks -------------------------------- #!/bin/bash display() { echo "Welcome to Unix" } display ----------------------------- Script2.sh #!/bin/bash sh script1.sh //simply calling script1.sh ------------------------------ (1 Reply)
Discussion started by: mvictorvijayan
1 Replies

7. Shell Programming and Scripting

error when call function in bash script

Dear all, Could you please advice as I when call function i found the following error " refills: command not found" note that refills is function name. following also the function and how i call it function refills { echo "formatting refills and telepin" >> $log awk -F,... (20 Replies)
Discussion started by: ahmed.gad
20 Replies

8. Shell Programming and Scripting

Ceil not working as function in awk statement

Hi, I have the following code in which i am trying to find ceil of 10th & 11th fields. For finding ceil i have a function in the awk statement. When i test it for some values say on command line it gives correct response(say $10=0 & $11=750). But when the same value occurs in a file having more 3... (5 Replies)
Discussion started by: siramitsharma
5 Replies

9. Shell Programming and Scripting

Bash script from makefile - it is called each time i call make

I've created a tag in the makefile: mytag: $(shell ${PWD}/script.sh) When i do: make clean - the script is executed When i perform make or make mytag the script is again executed with the output: make: Nothing to be done for mytag What i want ? I want script.sh to be executed only... (0 Replies)
Discussion started by: Pufo
0 Replies

10. UNIX for Beginners Questions & Answers

Call user defined function from awk

My requirement is to call function ("fun1") from awk, and print its returned value along with $0. fun1() { t=$1 printf "%02d\n", $t % 60; } echo "Hi There 23" | awk '{print $0; system(fun1 $3)}' Any suggestions what to be modified in above code to achieve requirement.. (5 Replies)
Discussion started by: JSKOBS
5 Replies

LEARN ABOUT CENTOS

grub2-mkrescue

GRUB-MKRESCUE(3)					     Library Functions Manual						  GRUB-MKRESCUE(3)

NAME

       grub-mkrescue -- Generate a GRUB rescue image using GNU Xorriso.

SYNOPSIS

       grub-mkrescue [-o | --output=FILE] [--modules=MODULES]
		      [--install-modules=MODULES] [--themes=THEMES]
		      [--fonts=FONTS] [--locales=LOCALES]
		      [--compress[=no,xz,gz,lzo]] [-d | --directory=DIR]
		      [--grub-mkimage=FILE] [--rom-directory=DIR]
		      [--xorriso=FILE] [--grub-glue-efi=FILE]
		      [--grub-render-label=FILE] [--label-font=FILE]
		      [--label-color=COLOR] [--label-bgcolor=FILE]
		      [--product-name=STRING] [--product-version=STRING]
		      [--sparc-boot] [--arcs-boot]

DESCRIPTION

       grub-mkrescue can be used to generate a rescue image with the GRUB bootloader.

OPTIONS

       --output=FILE
	      Write the generated file to FILE.  The default is to write to standard output.

       --modules=MODULES
	      Pre-load modules specified by MODULES.

       --install-modules=MODULES
	      Install only MODULES and their dependencies.  The default is to install all available modules.

       --themes=THEMES
	      Install THEMES.  The default is to install the starfield theme, if available.

       --fonts=FONTS
	      Install FONTS.  The default is to install the unicode font.

       --locales=LOCALES
	      Install only locales listed in LOCALES.  The default is to install all available locales.

       --compress[=no,xz,gz,lzo]
	      Compress GRUB files using the specified compression algorithm.

       --directory=DIR
	      Use images and modules in DIR.

       --grub-mkimage=FILE
	      Use FILE as grub-mkimage(1).  The default is /usr/bin/grub-mkimage.

       --rom-directory=DIR
	      Save ROM images in DIR.

       --xorriso=FILE
	      Use FILE as xorriso.

       --grub-glue-efi=FILE
	      Use FILE as grub-glue-efi(3).

       --grub-render-label=FILE
	      Use FILE as grub-render-label(3).

       --label-font=FILE
	      Use FILE as the font file for generated labels.

       --label-color=COLOR
	      Use COLOR as the color for generated labels.

       --label-bgcolor=COLOR
	      Use COLOR as the background color for generated labels.

       --product-name=STRING
	      Use STRING as the product name in generated labels.

       --product-version=STRING
	      Use STRING as the product version in generated labels.

       --sparc-boot
	      Enable booting the SPARC platform.  This disables HFS+, APM, ARCS, and "boot as disk image" on the i386-pc target platform.

       --arcs-boot
	      Enable  ARCS  booting.  This is typically for big-endian MIPS machines, and disables HFS+, APM, sparc64, and "boot as disk image" on
	      the i386-pc target platform.

       --     All options after a -- will be passed directly to xorriso's command line when generating the image.

SEE ALSO

       info grub

								  Wed Feb 26 2014						  GRUB-MKRESCUE(3)
All times are GMT -4. The time now is 01:55 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy