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Top Forums Shell Programming and Scripting Help, while loop and sed not producing desired output Post 302483531 by packetjockey on Monday 27th of December 2010 03:42:26 PM
Old 12-27-2010
Help, while loop and sed not producing desired output

Hello everyone,

I need some assistance with what I thought would have been a very simple script.

Purpose of Script:
Script will parse through a source file and modify (search/replace) certain patterns and output to stdout or a file. Script will utilize a "control file" which will contain what to search for and what to replace it with. "Control file" will be used against the "source file".

Script Goals:
  1. Comments (lines beginning with #) and blank lines in the "control file" should be ignored by the script. [DONE]
  2. "Control file" will contain structured data. Deliminator with be initially a blank space, will be changed to a semi-colon. [DONE]
  3. The script works Smilie [This is where I need help]
Example of "Control file"
Code:
#this is a comment, should be skipped



#blank lines should also be skipped


#data is structured as SEARCH REPLACE

#ok, here is some data
search1 replace1
search2 replace2


search3 replace3


#more data 
search4 replace4

Example of "Source file"
Code:
search1


search2
search3



search4

Example of the script
Code:
#!/bin/bash

while read SEARCH REPLACE
    do
        sed -e 's/$SEARCH/$REPLACE/' sourcefile
    done < <(awk '!/^#|^$/ { print $0}' controlfile)

Example of script output to stdout
Code:
search1


search2
search3



search4
search1


search2
search3



search4
search1


search2
search3



search4
search1


search2
search3



search4

Here I would have expected a bunch of replaces outputted (replace1, replace2, replace3, ...).

I can't seem to figure out what I am doing wrong. Any help would be greatly appreciated. Thanks in advanced.
 

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Locale::Script(3pm)					 Perl Programmers Reference Guide				       Locale::Script(3pm)

NAME
Locale::Script - standard codes for script identification SYNOPSIS
use Locale::Script; $script = code2script('phnx'); # 'Phoenician' $code = script2code('Phoenician'); # 'Phnx' $code = script2code('Phoenician', LOCALE_CODE_NUMERIC); # 115 @codes = all_script_codes(); @scripts = all_script_names(); DESCRIPTION
The "Locale::Script" module provides access to standards codes used for identifying scripts, such as those defined in ISO 15924. Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 15924 four-letter codes will be used. SUPPORTED CODE SETS
There are several different code sets you can use for identifying scripts. 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: $script = code2script('phnx','alpha'); $script = code2script('phnx',LOCALE_SCRIPT_ALPHA); The codesets currently supported are: alpha, LOCALE_SCRIPT_ALPHA This is a set of four-letter (capitalized) codes from ISO 15924 such as 'Phnx' for Phoenician. It also includes additions to this set included in the IANA language registry. The Zxxx, Zyyy, and Zzzz codes are not used. This is the default code set. num, LOCALE_SCRIPT_NUMERIC This is a set of three-digit numeric codes from ISO 15924 such as 115 for Phoenician. ROUTINES
code2script ( CODE [,CODESET] ) script2code ( NAME [,CODESET] ) script_code2code ( CODE ,CODESET ,CODESET2 ) all_script_codes ( [CODESET] ) all_script_names ( [CODESET] ) Locale::Script::rename_script ( CODE ,NEW_NAME [,CODESET] ) Locale::Script::add_script ( CODE ,NAME [,CODESET] ) Locale::Script::delete_script ( CODE [,CODESET] ) Locale::Script::add_script_alias ( NAME ,NEW_NAME ) Locale::Script::delete_script_alias ( NAME ) Locale::Script::rename_script_code ( CODE ,NEW_CODE [,CODESET] ) Locale::Script::add_script_code_alias ( CODE ,NEW_CODE [,CODESET] ) Locale::Script::delete_script_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.unicode.org/iso15924/ Home page for ISO 15924. 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) 1997-2001 Canon Research Centre Europe (CRE). Copyright (c) 2001-2010 Neil Bowers Copyright (c) 2010-2013 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::Script(3pm)
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