Sponsored Content
Top Forums Shell Programming and Scripting How do I perform double substitution in bash? Post 302305716 by patjones on Thursday 9th of April 2009 02:40:51 PM
Old 04-09-2009
try declaring the array outside the while loop
and for double substitution, use eval statement
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

double variable substitution

Hi, I want to substitute variable in sed using combination of name and var_$name: name=Tom var_$name=1 sed -n "${var_"$name"}"p < myfile but it doesn't work, do you know what's wrong ? Thanks (1 Reply)
Discussion started by: asal_email2
1 Replies

2. Shell Programming and Scripting

Double Substitution variables in ksh

Hi I have a variable whose value is like this i=/test/test1/test2/myfile.cd.070505123457 i would like to have the value of myfile.cd stored into another variable my attempt is test=${i##*/} ;echo $test ##and i get myfile.cd.070505123457 since what i wnat is myfile.cd i try this... (19 Replies)
Discussion started by: xiamin
19 Replies

3. Shell Programming and Scripting

double substitution

Hello, I would like to dual subtitutes variables. I tried $serv="combo" combo_TYPE="mop" TYPENAME="$serv_TYPE" Now, I'd like to get "mop" from TYPENAME echo "${${TYPENAME}}" I have a bad substitution error :) (1 Reply)
Discussion started by: pppswing
1 Replies

4. Shell Programming and Scripting

/bin/bash - variable substitution.

Is it possible with a bash variable to perform multiple substitution strings to one variable? I have this variable: echo $clock TIMEZONE="US/Central" What I would like to do with bash only it pull out just the "US" part of the variable.. which could be any number of countries. this is... (6 Replies)
Discussion started by: trey85stang
6 Replies

5. Shell Programming and Scripting

Using echo to print double quotes along with variable substitution

Hi, I am generating html code using cshell, but i am having one problem while printing double quotes, I need to write following code in file. where $var contains list of web address <a href="$var">$var</a> So i am using echo "<a href="$var">$var</a>" > file.html But with this " in... (4 Replies)
Discussion started by: sarbjit
4 Replies

6. Shell Programming and Scripting

Correct bash substitution

Hello! I'm writing a shell script using #!/bin/bash instead of #!/bin/sh because of the substitution: ${!variable}, which won't work with sh. My main problem is the following (just a summarized example, the script is much more complex): # sourced from a configuration file, we have a lot of... (6 Replies)
Discussion started by: teresaejunior
6 Replies

7. Shell Programming and Scripting

bash, command line substitution

I have one script calling another with a set of strings that includes white space. Script A calls Script B with these input strings: one two "th ree" Script B pulls apart the arguments correctly: arg0 = one, arg1 = two, arg2 = "th ree" if I call it from within Script A like so:... (10 Replies)
Discussion started by: skippyV
10 Replies

8. UNIX for Dummies Questions & Answers

Double variable substitution

$ ABCel='abc@gmail.com' $ XYZel='xyz@gmail.com' $ MYel='my@yahoo.com' $ echo $ABCel abc@gmail.com $ echo $XYZel xyz@gmail.com $ echo $MYel my@yahoo.com I tried 3 variations, but not getting the expected result: $ for VAR in ABC XYZ; do echo -e "${VAR}el $MYel"; done ABCel... (1 Reply)
Discussion started by: bagnoble
1 Replies

9. Shell Programming and Scripting

How to Force command substitution evaluation in bash?

OK, I'm striving to abide by all the rules this time. Here is a fragment of my windows10/cygwin64/bash script: export BUPLOG=$(BackupRecords --log "$src") robocopy $(BackupRecords -mrbd "$src" --path "$src") $(BackupRecords --appSwitches "$src") "$src" "$dst" $(BackupRecords --fileSwitches... (0 Replies)
Discussion started by: siegfried
0 Replies

10. Shell Programming and Scripting

BASH script to read external file to perform text replacements?

Hi all, I have a moderate size (300 lines) BASH Shell script that performs various tasks on different source reports (CSV files). One of the tasks that it performs, is to use SED to replace 'non-conforming' titles with conformant ones. For example "How to format a RAW Report" needs to become... (3 Replies)
Discussion started by: richardsantink
3 Replies
LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME
libbash -- A bash shared libraries package. DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may want to load and use in scripts of your own. It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries. Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded using ldbash(1) must answer 4 requirments: 1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash). 2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library exports. I.e. all the function that will be usable after loading that library will be listed in that line. 3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are required for our library. I.e. every bash library that is in use in our bash library must be listed there. 4. The library must be listed (For more information, see ldbashconfig(8)). Basic guidelines for writing library of your own: 1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions. 2. Try to declare all variables intended for internal use as local. 3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with: __<library_name>_ For example, internal function myfoosort of hashstash library should be named as __hashstash_myfoosort This helps to avoid conflicts in global name space when using libraries that come from different vendors. 4. See html manual for full version of this guide. AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <ril@ran4.net> SEE ALSO
ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1) Linux Epoch Linux
All times are GMT -4. The time now is 09:00 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy