Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: [Solved] cp command with dollar variable in ksh
Top Forums Shell Programming and Scripting [Solved] cp command with dollar variable in ksh Post 302682225 by bakunin on Sunday 5th of August 2012 10:10:18 PM
Old 08-05-2012
Quote:
Originally Posted by abdulhusein
the reason being that this would necessitate to know all the environment variable names that are going to be used. Any new variable added would require an update to the main script..
To be honest i don't quite get it. Actually this is the case in your proposed solution, not in mine: just because i denominate it "DEST" in the file as well as in the variables name doesn't mean they have to be equal: try it out and rename the variable "DEST" throughout the script and you will see that it still works as expected.

Quote:
but what would really help me is something which would replace any environment variable with its value without the check and replace in the script.
I have already told you how this works: use "eval" like i explained at length in the link i gave. But be warned: this works ONLY, if the variable you use in the configuration file is predefined in the script with the exact name to match. In fact this behavior - every change to the environment will make a script change necessary - is true for your solution, because you define the value to which the variable should expand only in the script, not in the configuration file. As you can have many configuration files, but only need one script to run them, i think my solution will be more flexible than yours, but anyway, do as you like.

But maybe i got your requirement wrong (if so: please explain in detail what you want to do - the thing with "any environment variable" is obviously not part of the "i write a script to copy files" requirement, because it wouldn't be necessary for that), so please post your script and the intended input file alonw with its expected output or effect. This might help to understand better what you want to do.

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
abdulhusein
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

[SOLVED] Scope of KSH Variable in Perl?

cat test.ksh #!/usr/bin/ksh VAR="Dear Friends \n How are you? \n Have a nice day \n" export VAR echo "Inside test.ksh"; ./test.pl cat test.pl #!/usr/bin/perl print "Inside test.pl \n"; print "$VAR"; Output: ./test.ksh Inside test.ksh Inside test.plWhat I want to achieve is, I... (1 Reply)
Discussion started by: dahlia84
1 Replies

2. Shell Programming and Scripting

[Solved] Command Substitution and Variable Expansion within a Case

Hello All, I don't write scripts very often, and in this case I am stumped, although it may be a bug in the version of bash I have to use (it's not my system). I want to extract a specific string snippet from a block of text (coming from a log file) that is dependent on a bunch of other... (1 Reply)
Discussion started by: jaimielives
1 Replies

3. Shell Programming and Scripting

substitute the starting dollar sign in command with blank

Hi,, Let example cmd: $$config/all Here I want to replace or subsitute blank space and also with any other character in place of "$" sign...and also want to replace backslash (/) with forward (\)......in expect script please could any one help on this.....thank you (2 Replies)
Discussion started by: swethakast
2 Replies

4. Shell Programming and Scripting

[Solved] Help with Sort command (ksh)

hello everyone, I have file with de-limited values in random order shown below, where C1V0 represents column1 value1, C2V0 represents column2 value 2, and so on. Column0 is a constant value which i didn't represent in the sample input format. Column1 is a numeric column. Column2 is a... (0 Replies)
Discussion started by: angie1234
0 Replies

5. Shell Programming and Scripting

Variable to command to Variable Question KSH

Hello, First post for Newbie as I am stumped. I need to get certain elements for a specific PID from the ps command. I am attempting to pass the value for the PID I want to retrieve the information for as a variable. When the following is run without using a variable, setting a specific PID,... (3 Replies)
Discussion started by: Coyote270WSM
3 Replies

6. UNIX for Dummies Questions & Answers

[Solved] Help needed to have changing value to the command prompt string variable PS1

Hi, I am using git bash terminal window to do git operations. I have set the prompt string variable PS1 in the ~/.bashrc file as follows: export PS1=" " This is intended to show me the current git branch's name which is active as part of the prompt string. But, the problem is when I do a git... (2 Replies)
Discussion started by: royalibrahim
2 Replies

7. Shell Programming and Scripting

[Solved] KSH: Array/If Help

RedHat 5 KSH I am creating an array, and then using case to go through and count for specific words. Then the count gets stored as an expression. string='ftp rcp rsh telnet ftp ftp' set -A myarray $string FTPCOUNT="0" for command in ${myarray} do case $command in ftp) FTPCOUNT=`expr... (2 Replies)
Discussion started by: nitrobass24
2 Replies

8. Shell Programming and Scripting

[Solved] How to increment and add variable length numbers to a variable in a loop?

Hi All, I have a file which has hundred of records with fixed number of fields. In each record there is set of 8 characters which represent the duration of that activity. I want to sum up the duration present in all the records for a report. The problem is the duration changes per record so I... (5 Replies)
Discussion started by: danish0909
5 Replies

9. Shell Programming and Scripting

Grep and dollar command

Hello there, first of all, don't hesitate to notify me if I misbehave. I'm a newbe in the use of this site, and in unix too (in english as well :-) Well, if someone hat a little time to waste, could he explain to me this strange behavior. I'm using ksh under AIX. cdeset=$(su - db2inst1 -c... (8 Replies)
Discussion started by: skitoc
8 Replies

10. Shell Programming and Scripting

Dollar symbol in Shell Script Variable

Hi, I am working on PGP encryption. I am getting public keys from some file. One of the key has dollar sign in it "$" Example: "abc$123" echo 'passphrase='$passphrase --> Giving correct value abc$123 But if I use $passphrase in PGP command getting Invalid passphrase error. If I... (10 Replies)
Discussion started by: Sreehari
10 Replies

LEARN ABOUT X11R4

times

times(1)							   User Commands							  times(1)

NAME

       times - shell built-in function to report time usages of the current shell

SYNOPSIS

   sh
       times

   ksh
       times

DESCRIPTION

   sh
       Print the accumulated user and system times for processes run from the shell.

   ksh
       Print the accumulated user and system times for the shell and for processes run from the shell.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words,  following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
	   able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation  are  not
	   performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), sh(1), time(1), attributes(5)

SunOS 5.10							    15 Apr 1994 							  times(1)
All times are GMT -4. The time now is 11:32 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy