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Full Discussion: Trouble using awk command
Top Forums Shell Programming and Scripting Trouble using awk command Post 302929531 by Ravindra Swan on Monday 22nd of December 2014 12:43:36 PM
Old 12-22-2014
Trouble using awk command
Hi,

I have 2 .txt pads containing data.
I need a script which reads content of one .txt file, performs some operations and calculates a number which is stored in a variable.
Now , all the content of another .txt pad should be appended to first .txt pad at pre calculated nth line number.

Below is sample data and commands i tried
Code:
> cat temp.dml
record
  decimal("\x01") lst_updt_run_id; /* INTEGER NOT NULL*/
decimal("\x01") invalid_data;
end;
 
cat > t.txt
this is the first line
[[this is second line]]
. h.ksh
 
expected O/P: If want to append at 1st line
 
this is the first line
[[this is second line]]
. h.ksh
record
  decimal("\x01") lst_updt_run_id; /* INTEGER NOT NULL*/
decimal("\x01") invalid_data;
end;
 
tried code:
> awk 'NR==1{file="t.txt";while ((getline<file) > 0) {print}}1' temp.dml | uniq
this is the first line
[[this is second line]]
. h.ksh
  decimal("\x01") lst_updt_run_id; /* INTEGER NOT NULL*/
decimal("\x01") invalid_data;
end;

there were couple of issues faced:
1. I tried matching NR with a variable which contains the line position to append but it was not working.
2.Last row of second .txt pad is repeating and hence i used uniq keyword.

Any solutions to this?
 

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LEARN ABOUT DEBIAN

hotswaprc

HOTSWAPRC(5)							File Formats Manual						      HOTSWAPRC(5)

NAME

       hotswaprc - configuration file for  hotswap

DESCRIPTION

       /etc/hotswaprc is the global configuration file for the hotswap utility.

       It  allows system administrators to specify arbitrary shell scripts to be run after a device is inserted, as well as before and after it is
       removed. Scripts are selected according to the model name retrieved from the device. This is particularly helpful for automatic	configura-
       tion of CD-RW drives, which require SCSI emulation and bypass normal access via the IDE subsystem.

       hotswaprc  is  implemented  as  an  Extensible Mark-up Language (XML) application.  XML documents are structured using elements of the form
       <tag-name> content <tag-name>. A Document Type Definition (DTD) describes the possible content of each element.

       Please refer to the XML specification for more information. The hotswap distribution also contains an example file,  doc/hotswaprc.example,
       which includes the DTD for the configuration file format.

ELEMENTS

       <hotswap>
	      This is the root element of the document. Each valid hotswaprc must contain exactly one <hotswap> element. The <hotswap> element may
	      contain an arbitrary number of <device> elements.

       <device>
	      The configuration file contains one <device> element for every device for which scripts are defined. The <device>  element  is  com-
	      posed of the following elements in this order: <name>, <post-insert>, <pre-remove>, <post-remove>. All but <name> are optional.

       <name> The content of this element is the model identification string of the IDE device the current <device> element refers to.

       <post-insert>
	      Contains the shell script that is to be executed after the device has been inserted and registered with the kernel.

       <pre-remove>
	      Contains the shell script that is to be run before hotswap attempts to unregister the device.

       <post-remove>
	      Contains the shell script that is to be run after the device had been unregistered.

REPORT BUGS

       Report bugs to t.stadelmann1@physics.ox.ac.uk.

AUTHOR

       Written by Tim Stadelmann.

SEE ALSO

       hotswap(1), xhotswap(1).

COPYRIGHT

       Copyright (c) 2002-2003 Tim Stadelmann.

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License (GPL), Version 2 or
       any later version published by the Free Software Foundation.

								26th November 2002						      HOTSWAPRC(5)
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