Sponsored Content
Top Forums Shell Programming and Scripting Shell script variable names created dynamically Post 302561491 by u671296 on Tuesday 4th of October 2011 09:42:40 AM
Old 10-04-2011
Shell script variable names created dynamically

Hi,

I'm trying to use a config file to define frequencies for checking log files. If the config file contains a frequency it will be used else a default value. The format of the config file (and hence the environment variable) is
FREQ_log_logname=value

A test shell script as below:
Code:
FREQ_log_aaa="DAILY"
FREQ_log_bbb="WEEKLY"
FREQ_log_ccc="DAILY"
for i in aaa bbb ccc
do
logfreq="$FREQ_log_$i"
echo "$logfreq";
done

outputs:
Code:
aaa
bbb
ccc

rather than the desired:
Code:
DAILY
WEEKLY
DAILY

I've spent the last hour trying eval but get the same or bad substitution errors. Does anybody know how to do this ? Thanks.


Moderator's Comments:
Mod Comment Video tutorial on how to use code tags in The UNIX and Linux Forums.

Last edited by Franklin52; 10-04-2011 at 11:07 AM.. Reason: Please use code tags, thank you
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to set dynamically keys names in perl %hash

hello I have loop , in this loop im picking names , this names I want to be keys in %hash but I don't know how to set in every loop entertain different key in the %hash (1 Reply)
Discussion started by: umen
1 Replies

2. Shell Programming and Scripting

Shell script dynamically case in VAR

Hallo, I am working on a kdialog. This shall be able to load the required commands from a .conf file. First step runs good by loading the entries (selectabel entries) in a variable: MIRRORSELECT=$(kdialog --radiolist "Select your nearest mirror" $VAR1) The kdialog is accordingly correct... (2 Replies)
Discussion started by: ACTGADE
2 Replies

3. Shell Programming and Scripting

Dynamically creating text files using shell script

Hi All, I want to create a shell script which dynamically create text files. i am using the following script $i=1 while do cat > test_$i.txt done but while running the script it was stopping(the cursor not going to next step, i have to enter ctrl+c to make it stop). it is creating only... (2 Replies)
Discussion started by: KiranKumarKarre
2 Replies

4. Shell Programming and Scripting

how to create the files dynamically in c shell script

how can i CREATE a txt file dynamically in c shell: for instance: #! /bin/csh for each i (*) cat>file$i.txt for each j do .... (1 Reply)
Discussion started by: jdsignature88
1 Replies

5. Shell Programming and Scripting

Evaluate string containing shell variable names

Hello, I have this: #!/usr/bin/ksh V1=ABC str="hello 123;${V1}" eval "echo $str" i get hello 123 /script.sh ABC not found However eval works if $str variable doesn't contain a semicolumn (eg if str="hello 123~${v1}" running the eval statement above would produce (2 Replies)
Discussion started by: endorphin
2 Replies

6. Shell Programming and Scripting

Passing filename dynamically in SPOOL of SQL*PLUS in shell script

Hi all, I am executing shell script in which I am using SQLLDR In this SQLLDR I am passing text file having PL/SQL script. This script will produce some formated output, this output I have to spool in another text file. Currently I have given this in script file as following Spool... (2 Replies)
Discussion started by: shekharjchandra
2 Replies

7. Shell Programming and Scripting

[SHELL: /bin/sh] For loop using variable variable names

Simple enough problem I think, I just can't seem to get it right. The below doesn't work as intended, it's just a function defined in a much larger script: CheckValues() { for field in \ Group_ID \ Group_Title \ Rule_ID \ Rule_Severity \ ... (2 Replies)
Discussion started by: Vryali
2 Replies

8. Shell Programming and Scripting

Korn Shell help - Using parameter to create variable names

I'm using korn shell and I am wondering if it's possible to use a parameter passed into a function to build a variable name in a configuration file. I have the function in one source file, I'd like to have a global configuration file instead of hardcoding logins to each script. So I have a... (7 Replies)
Discussion started by: mrevello
7 Replies

9. Shell Programming and Scripting

Creating IN list in PLSQL script dynamically by using shell script

Hi all, I have a PLSQL script which has a IN list where it takes some ids as input. For example SELECT * FROM EMPLOYEE WHERE EMPLOYEE_ID IN (comma separated list ) I want to run this quest inside a shell script but I would like to prepare the IN list dynamically where the employee ids... (1 Reply)
Discussion started by: LoneRanger
1 Replies

10. Homework & Coursework Questions

How to Dynamically Pass Parameter to plsql Function & Capture its Output Value in a Shell Variable?

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: 2. Relevant commands, code, scripts, algorithms: #! /bin/ksh v="ORG_ID" ... (2 Replies)
Discussion started by: sujitdas2104
2 Replies
FC-PATTERN(1)                                                                                                                        FC-PATTERN(1)

NAME
fc-pattern - parse and show pattern SYNOPSIS
fc-pattern [ -cdVh ] [ --config ] [ --default ] [ -f format | --format format ] [ --version ] [ --help ] [ pattern [ element ... ] ] DESCRIPTION
fc-pattern parses pattern (empty pattern by default) and shows the parsed result. If --config is given, config substitution is performed on the pattern before being displayed. If --default is given, default substitution is performed on the pattern before being displayed. If any elements are specified, only those are printed. OPTIONS
This program follows the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. -c --config Perform config substitution on pattern. -d --default Perform default substitution on pattern. -f --format format Format output according to the format specifier format. -V --version Show version of the program and exit. -h --help Show summary of options. pattern Parses and displays pattern (uses empty pattern by default). element If set, the element property is displayed for parsed pattern. SEE ALSO
FcNameParse(3) FcConfigSubstitute(3) FcDefaultSubstitute(3) FcPatternPrint(3) FcPatternFormat(3) fc-cat(1) fc-cache(1) fc-list(1) fc- match(1) fc-query(1) fc-scan(1) The fontconfig user's guide, in HTML format: /usr/share/doc/fontconfig/fontconfig-user.html. AUTHOR
This manual page was updated by Behdad Esfahbod <behdad@behdad.org>. 16 April 2012 FC-PATTERN(1)
All times are GMT -4. The time now is 02:56 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy