12-12-2007
I think you want this:
Quote:
$ MART=wall
$ DB_wall_USER=wallmart
$ eval eval export DB_ID=\${DB_${MART}_USER}
$ echo $DB_ID
wallmart
HTH.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hey All,
I'm trying to clean up a variable using sed but It dosn't seem to work. I'm trying to find all the spaces and replace them with "\ " (a slash and a space). For Example "Hello World" should become "Hello\ World". But it does nothing. If I put it directly into the command line it works... (3 Replies)
Discussion started by: spragueg
3 Replies
2. UNIX for Dummies Questions & Answers
Hi everyone,
I have a simple question to ask :
In a script that I'm writting, I need to create variables on-the-fly.
For instance, for every iterartion of the following loop a var_X variable should be generated :
#!/bin/ksh
a="1 2 3"
for i in $a
do
var_${i}=$i
echo "${var_$i}"
done
... (1 Reply)
Discussion started by: ck-18
1 Replies
3. Shell Programming and Scripting
I have run into a wall with my iptables firewall scripting.
I am blocking all of the private side IP addresses on the
WAN interface on systems running NAT. However, if the
system is not running NAT and needs to allow access to
the local LAN on the WAN interface, I need to block all
but one of... (2 Replies)
Discussion started by: garak
2 Replies
4. Shell Programming and Scripting
Hello,
i have another sed question.. I'm trying to do variable substition with sed and i'm running into a problem.
my var1 is a string constructed like this:
filename1 filerev1 filepath1
my var2 is another string constructed like this:
filename2 filerev2 filepath2
when i do... (2 Replies)
Discussion started by: alrinno
2 Replies
5. UNIX for Dummies Questions & Answers
Hi,
That might be pretty simple.
How can I generate a variable name and get their value ?
Thanks a lot.
Something like:
>CUSTOMER_NF=26
> object=CUSTOMER
> echo ${object}_NF
CUSTOMER_NF
> echo ${${object}_NF}
ksh: ${${object}_NF}: 0403-011 The specified substitution is... (7 Replies)
Discussion started by: Leo_NN
7 Replies
6. Shell Programming and Scripting
Hello everybody,
I've written the following script:
vOutputFile="subs_out.txt"
vAccount1="ebsemerg"
vAccount2="ebsemer2"
vAccount3="ebsemer3"
vAccount4="ebsemer4"
vAccount5="ebsemer5"
vAccount="vAccount"
vNumber=1234567
cd /opt/east/bin
echo ${print 'vAccount'${ind}}
for (( ind =... (3 Replies)
Discussion started by: jitu.jk
3 Replies
7. Shell Programming and Scripting
file1.ksh
#!/bin/ksh
test5_create="I am a man" # test5 will be dynamic and the value will be passed from command line
a=${1}_create
echo $a # i need the output as "I am a man"
./file1.ksh test5 # i run the script like this
any suggessions guys... (1 Reply)
Discussion started by: giri_luck
1 Replies
8. Shell Programming and Scripting
Hi ,
I have a variable as follows,
Temp=`cat ABC.txt | cut -c5-`
This will yeild a part of the date. say , 200912.
I would like to substitute this variable's value in a filename.
eg: File200912F.zip
when i say File$TempF.zip , it is not substituting.
Any help ?
Thanks in... (2 Replies)
Discussion started by: mohanpadamata
2 Replies
9. Shell Programming and Scripting
For example I have variable like below
echo $OUTPUT
/some/path/`uname -n`
when I try to use the variable OUTPUT like below
cd $OUTPUT or cd ${OUTPUT}
I am getting bad substituion error message
$ cd $OUTPUT
ksh: cd: bad substitution
$ cd ${OUTPUT}
ksh: cd: bad substitution
... (1 Reply)
Discussion started by: rajukv
1 Replies
10. Shell Programming and Scripting
Hi,
I have to write a shell script in which I have to substitute a variable within a variable. For example,
var1=aaa
var2=file.$var1.txt
The output should be,
echo $var2
file.aaa.txt
Can someone please help me in getting this. I tried using eval, but it didnt work. I might be using it... (2 Replies)
Discussion started by: grajp002
2 Replies
EVAL(P) POSIX Programmer's Manual EVAL(P)
NAME
eval - construct command by concatenating arguments
SYNOPSIS
eval [argument ...]
DESCRIPTION
The eval utility shall construct a command by concatenating arguments together, separating each with a <space>. The constructed command
shall be read and executed by the shell.
OPTIONS
None.
OPERANDS
See the DESCRIPTION.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
None.
ASYNCHRONOUS EVENTS
Default.
STDOUT
Not used.
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
If there are no arguments, or only null arguments, eval shall return a zero exit status; otherwise, it shall return the exit status of the
command defined by the string of concatenated arguments separated by <space>s.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
foo=10 x=foo
y='$'$x
echo $y
$fooeval y='$'$x
echo $y
10
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
Special Built-In Utilities
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE
/The Open Group 2003 EVAL(P)