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Full Discussion: how to expand environment variables in a file?
Top Forums UNIX for Dummies Questions & Answers how to expand environment variables in a file? Post 302330577 by debbie15 on Wednesday 1st of July 2009 05:00:47 PM
Old 07-01-2009
Hi Jim,
I want to substitute the value for ${SourceFilePath} and not create a file with the variable name. file.txt is already existing.

My scenario is like this.

file.txt is present on the TEST & DEV
I want to use the environment variable to point either to TEST or DEV.
So i will have one parameter file
PATH=$SourceFilePath/file.txt

I want to write a script which will generate a new file for the following system
TEST server should create a new file abc.txt with the following content

PATH=/db1/Src/test/file.txt

DEV server should create a new file xyx.txt with the following content

PATH=/db1/Src/dev/file.txt

The command or script must only substitute the value for the environment variable.

Thanks for your input.
 

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LEARN ABOUT DEBIAN

trcs

trcs(1) 							   User Manuals 							   trcs(1)

NAME

       trcs - convert text files from one codeset to other

SYNOPSIS

       trcs -C | -l | -h

       trcs [-s] [-f input-codeset ] [-t output-codeset ] [ file ]...

DESCRIPTION

       trcs  is a program for translation of text files from one codeset to other.  When exact translation is impossible it tries to make approxi-
       mations.  For example pseudographic characters are approximated by ASCII characters in codesets that have no pseudographic  characters  and
       characters with diacritical marks are approximated by existing characters.

       If the option -s or --gen-script is given trcs will generate simple script that invokes tr(1) This is useful if you want to include this in
       your script or for faster conversion of many files.

       If none of -C, -s, -l, -h and their equivalents is given each file will be read assuming it is coded with codeset input-codeset On standard
       output  it will be recoded so to use codeset output-codeset If there is no file given trcs will act as filter.  Both input-codeset and out-
       put-codeset are case insensitive and default to `cp1251'.

OPTIONS

       -C, --copyright
	      Display copying conditions and warranty information.

       -s, --gen-script
	      Generates conversion script for given input and output encodings instead to convert text files.

       -l, --list
	      List all known codesets with their aliases.

       -h, --help
	      Display this help and exit.

       -f input-codeset, --from[=]input-codeset
	      Codeset of the source.

       -f output-codeset, --to[=]output-codeset
	      Codeset of the output.

EXAMPLES

       trcs -fcyrillic -t koi8-r letter.txt
	      Convert letter.txt from ISO-8859-5 (cyrillic) to KOI8-R and output the result on standard output.

       trcs --from cp437 --to=mik --gen-script >ibm2mik
	      Generates script ibm2mik for converting from CP437 to MIK.

       sh ibm2mik screen.txt
	      Convert screen.txt from CP437 to MIK.  Output the result on standard output.  Without parameters ibm2mik acts as filter.

AUTHOR

       Anton Zinoviev <anton@lml.bas.bg>, <zinoviev@fmi.uni-sofia.bg>

SEE ALSO

       tr(1)

Linux								     JUN 2000								   trcs(1)
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