Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Copy file and evaluate its internal variables
Top Forums Shell Programming and Scripting Copy file and evaluate its internal variables Post 302763137 by steadyonabix on Tuesday 29th of January 2013 03:22:22 PM
Old 01-29-2013
Copy file and evaluate its internal variables
Hi

I have been trying to figure a way to copy a file, (a template), that has internal variables. Using the values as defined for those variables in another script.

So a file called x -

Code:
#! /bin/bash
D=aa.$X.bb

And file y

Code:
#! /bin/bash

X=6
while read line
do
    eval echo "$line" 
done < x

Output -

Code:
brad@TX5XN:~/wip$ y

D=aa.6.bb

brad@TX5XN:~/wip$

As you can see I lose the line with the #! from file x

If I redirect to a file -

Code:
brad@TX5XN:~/wip$ cat y
#! /bin/bash

X=6
while read line
do
    eval echo "$line"  > z
done < x

I lose all of the lines except the blank line from the end of the file -

Code:
brad@TX5XN:~/wip$ cat z

brad@TX5XN:~/wip$

Is there a simple and elegant way of doing this?

Thanks

Brad
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to evaluate the value read from a file?

Hi, Could someone please help me with how to do the following? Say I have a flat file test.lst and the content of the file is: Report Date - `date '+%m%d%Y'` I'm trying the following while read myLine do echo ${myLine} done<test.lst This prints Report Date - `date... (1 Reply)
Discussion started by: arunsoman80
1 Replies

2. UNIX for Advanced & Expert Users

Forwarding internal internet packets to internal webserver using iptables

Hi, I need to redirect internal internet requests to a auth client site siting on the gateway. Currently users that are authenticated to access the internet have there mac address listed in the FORWARD chain. All other users need to be redirected to a internal site for authentication. Can... (1 Reply)
Discussion started by: mshindo
1 Replies

3. UNIX for Dummies Questions & Answers

copy file using a variables

i am having a file name hello.txt i want to move it to some where in the destination folder suppose name is accnt i have done this things but not working , can't we assign a path to a variable #/bin/sh file =hello.txt dest ='accnt' cp $file $dest Thank & Regard Dina (3 Replies)
Discussion started by: Manabhanjan
3 Replies

4. Shell Programming and Scripting

File splitting, naming file according to internal field

Hi All, I have a rather stange set of requirements that I'm hoping someone here could help me with. We receive a file that is actually a concatenation of 4 files (don't believe this would change, but ideally the solution would handle n files). The super-file looks like:... (7 Replies)
Discussion started by: Leedor
7 Replies

5. UNIX for Dummies Questions & Answers

How to use sed to copy specific lines from a file using shell variables?

hello! I am trying to use sed to copy specific set of lines from a file for which the starting and ending line numbers of the lines to be copied are stored in shell variables. How can i copy those lines? if the input_file is something like this and if the following is the script a=2 b=4... (4 Replies)
Discussion started by: a_ba
4 Replies

6. Shell Programming and Scripting

Need help in writing a script that do internal grep on a log file..and extract acct no's from it..

I need to write a script, which takes the input a log file and create output file with acct no's line by line from selected records with text like (in red) : 18:51:18 | 217863|Acct 0110855565|RC 17608| 16 Subs| 1596 UsgRecs| 2 Secs| 430 CPUms| prmis2:26213 <MoveUsage d aemon needs to run... (7 Replies)
Discussion started by: rkrish
7 Replies

7. Shell Programming and Scripting

Copy file to SD card from internal flash.

Hi, At first I have to say that I know nothing about Linux :( But I am looking for solution how to copy one file from internal Lowrnace HDS flash memory. Lowrance HDS is Linux based device. Here is the link for firmware update files for this unit. At the end of main firmware file there... (62 Replies)
Discussion started by: PouchX
62 Replies

8. UNIX for Dummies Questions & Answers

Read a flat file, evaluate and create output. UNIX SCRIPT.

Hi all, I have a flat file as below; 470423495|1||TSA-A000073800||1|||1 471423495|1||TSA-A000073800||5|||5 472423495|1||TSA-A000073800||2|||7 473423495|1||TSA-A000073800||3|||3 I like to create a Unix script. The script have to valuate the last two columns, if the values are... (4 Replies)
Discussion started by: mrreds
4 Replies

9. Shell Programming and Scripting

How to evaluate expressions in file

I have a situation where i need to evaluate expression and do substitutions in file file.ports port1=`expr $STARTINGPORT + 1` port2=`expr $STARTINGPORT + 2` port3=`expr $STARTINGPORT + 3` Intended output If my STARINGPORT is 100 port1=101 port2=102 port3=103 Can anyone please... (1 Reply)
Discussion started by: sasiharitha
1 Replies

10. UNIX for Dummies Questions & Answers

Copy same file with different variables

Hi All, I have same file with like 1xyz_1 ,1xyz_2 , 2ghj_1, 2ghj_2, 4wer_1, 4wer1_2 etc with lots of file having similar type of name. I want to creat folder and copy similar file to that folder. for example folder 1xyz should contain only 1xyz_1 ,1xyz_2. :mad: Thank you in Advance. ... (7 Replies)
Discussion started by: XXLMMN
7 Replies

LEARN ABOUT MOJAVE

locale::codes::langext

Locale::Codes::LangExt(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangExt(3pm)

NAME

       Locale::Codes::LangExt - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangExt;

	  $lext = code2langext('acm');		       # $lext gets 'Mesopotamian Arabic'
	  $code = langext2code('Mesopotamian Arabic'); # $code gets 'acm'

	  @codes   = all_langext_codes();
	  @names   = all_langext_names();

DESCRIPTION

       The "Locale::Codes::LangExt" module provides access to standard codes used for identifying language extensions, such as those as defined in
       the IANA language registry.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language
       registry codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language extensions. A code set may be specified using either a name, or
       a constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langext('acm','alpha');
	  $lext = code2langext('acm',LOCALE_LANGEXT_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from the IANA language registry, such as 'acm' for Mesopotamian Arabic.

	   This is the default code set.

ROUTINES

       code2langext ( CODE [,CODESET] )
       langext2code ( NAME [,CODESET] )
       langext_code2code ( CODE ,CODESET ,CODESET2 )
       all_langext_codes ( [CODESET] )
       all_langext_names ( [CODESET] )
       Locale::Codes::LangExt::rename_langext  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangExt::add_langext  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangExt::delete_langext  ( CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangExt::delete_langext_alias  ( NAME )
       Locale::Codes::LangExt::rename_langext_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::add_langext_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangExt::delete_langext_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.iana.org/assignments/language-subtag-registry
	   The IANA language subtag registry.

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.18.2							    2013-11-04					       Locale::Codes::LangExt(3pm)
All times are GMT -4. The time now is 11:15 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy