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Full Discussion: awk gsub with variables
Top Forums UNIX for Dummies Questions & Answers awk gsub with variables Post 302778965 by somu_june on Monday 11th of March 2013 10:52:39 PM
Old 03-11-2013
awk gsub with variables

Hello,

I'm trying to substitute a string with leading zero for all the records except the trailer record using awk command and with variables. The input file test_med1.txt has data like below

Code:
1234ABC...........................9200............LF
456789.............................0401............LF

And I want to replace 9200 with 09200 and 0401 with 00401

Code:
1234ABC...........................09200............LF
456789.............................00401............LF

I tried below command but not successfull

Command :

Code:
a= cat test_med1.txt | awk '!/TLR/' |
  cut -c 65-84 b= `cat test_med1.txt |
  awk '!/TLR/' |
  cut -c 65-84 |
  awk '{$0=0$0;print}'`; awk -v rvar=${a} -v svar=${b} '{gsub(rvar,svar); print}' test_med1.txt

Error:
Code:
cut: 0653-132 Cannot open b=.
cut: 0653-132 Cannot open 09200.
cut: 0653-132 Cannot open 00401.
cut: 0653-132 Cannot open 07803.
cut: 0653-132 Cannot open 05400.
cut: 0653-132 Cannot open 02500.
cut: 0653-132 Cannot open 09901.
cut: 0653-132 Cannot open 00700.
awk: 0602-533 Cannot find or open file 07803.
The source line number is 1.


Please let me know where the command in failing and if it is complete wrong then let me know how to get above output using awk and gsub command


Thanks,
Somaraju

Last edited by Scott; 03-12-2013 at 12:33 AM.. Reason: You forgot to add code tags...
 

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XCUTSEL(1)						      General Commands Manual							XCUTSEL(1)

NAME
xcutsel - interchange between cut buffer and selection SYNOPSIS
xcutsel [ -toolkitoption ...] [-selection selection] [-cutbuffer number] DESCRIPTION
The xcutsel program is used to copy the current selection into a cut buffer and to make a selection that contains the current contents of the cut buffer. It acts as a bridge between applications that don't support selections and those that do. By default, xcutsel will use the selection named PRIMARY and the cut buffer CUT_BUFFER0. Either or both of these can be overridden by com- mand line arguments or by resources. An xcutsel window has the following buttons: quit When this button is pressed, xcutsel exits. Any selections held by xcutsel are automatically released. copy PRIMARY to 0 When this button is pressed, xcutsel copies the current selection into the cut buffer. copy 0 to PRIMARY When this button is pressed, xcutsel converts the current contents of the cut buffer into the selection. The button labels reflect the selection and cutbuffer selected by command line options or through the resource database. When the ``copy 0 to PRIMARY'' button is activated, the button will remain inverted as long as xcutsel remains the owner of the selection. This serves to remind you which client owns the current selection. Note that the value of the selection remains constant; if the cutbuffer is changed, you must again activate the copy button to retrieve the new value when desired. OPTIONS
Xcutsel accepts all of the standard X Toolkit command line options as well as the following: -selection name This option specifies the name of the selection to use. The default is PRIMARY. The only supported abbreviations for this option are ``-select'', ``-sel'' and ``-s'', as the standard toolkit option ``-selectionTimeout'' has a similar name. -cutbuffer number This option specifies the cut buffer to use. The default is cut buffer 0. X DEFAULTS
This program accepts all of the standard X Toolkit resource names and classes as well as: selection (class Selection) This resource specifies the name of the selection to use. The default is PRIMARY. cutBuffer (class CutBuffer) This resource specifies the number of the cut buffer to use. The default is 0. WIDGET NAMES
The following instance names may be used when user configuration of the labels in them is desired: sel-cut (class Command) This is the ``copy SELECTION to BUFFER'' button. cut-sel (class Command) This is the ``copy BUFFER to SELECTION'' button. quit (class Command) This is the ``quit'' button. SEE ALSO
X(7), xclipboard(1), xterm(1), text widget documentation, individual client documentation for how to make a selection. BUGS
There is no way to change the name of the selection or the number of the cut buffer while the program is running. AUTHOR
Ralph R. Swick, DEC/MIT Project Athena XFree86 Version 4.7.0 XCUTSEL(1)
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