Evening all,
Have been trying to create the following environment variable:
${MD_SYSTEM}_ZZ_EMAIL_SUPPORT="myname@domain.com"
However when the script that contains the above is executed it returns:
ksh: MDQA_ZZ_EMAIL_SUPPORT=myname@domain.com: not found
Is what I'm trying to do... (2 Replies)
Bit of a newbie :D with regard to unix scripting and need some advice. Hopefully someone can help with the following:
I have a predefined set of variables as follows:
AAA_IP_ADD=1.1.1.1
BBB_IP_ADD=2.2.2.2
I have a funnction call which retrieves a value into $SUPPLIER which would be... (3 Replies)
Hi All,
I have the below scenario:
A file test.cfg with three fields>>
DATA1 DATA2 DATA3
In the script I need to assign each of the fields to variables. The number of fields will not be constant (this case we have three). Im trying to do something like this:
NUM=1
OUT_DAT_NO=3
... (4 Replies)
I found one post in another site with a solution for my problem
the below solution should explain what I want.
#!/bin/sh
first="one"
second="two"
third="three"
myvar="first"
echo ${!myvar}
But this gives error 'bad substitution'
System info
SunOS sundev2 5.9... (3 Replies)
Hi all,
I’m very new to UNIX programming. I have a question on dynamic variable
1. I’m having delimited file (only one row). First of all, I want to count number of columns based on delimiter. Then I want to create number of variables equal to number of fields.
Say number of... (5 Replies)
QUERY IN BRIEF
Listing the query in short
#! /bin/csh -f
#say i have invoked the script with two arguments : a1 and 2
set arg = $1 # that means arg = a1
echo "$arg" #it prints a1
#now what i want is:
echo "$a1"
#it will give error message :a1 undefined.
#however what i need is that the... (2 Replies)
Hi guys.
i have a requirment as below.
I have a scripts which perform for loop
for i in /backup/logs -- it will give all the logs file
SC_RIO_RWVM_20120413064217303.LOG
SC_RIO_RWXM_20120413064225493.LOG
SC_RIO_RXXM_20120413064233273.LOG
...
do
open script.sh ---- in this file... (3 Replies)
I have a small program which needs to pass variable dynamically to form the name of a second variable whose value wil be passed on to a third variable.
***************** Program Start ******************
LOC1=/loc1
PAT1IN=/loc2
PAT2IN=/loc3
if ; then
for fpattern in `cat... (5 Replies)
My Code :
--------------------------------------------
#!/bin/bash
for i in `echo server1 server2`
do
eval ${i}_name = "apache"
echo ${i}_name
done
--------------------------------------------
Current output :
>./test.sh
./test.sh: line 5: server1_name: command not found... (3 Replies)
Hello,
I'm trying to build a small script to store a command into a dynamic variable, and I have trouble assigning the variable.
#!/bin/bash
declare -a var1array=("value1" "value2" "value3")
var1arraylength=${#var1array}
for (( i=1; i<${var1arraylength}+1; i++ ));
do
mkdir... (7 Replies)
Discussion started by: alex2005
7 Replies
LEARN ABOUT OSX
eval
eval(n) Tcl Built-In Commands eval(n)
__________________________________________________________________________________________________________________________________________________NAME
eval - Evaluate a Tcl script
SYNOPSIS
eval arg ?arg ...?
_________________________________________________________________DESCRIPTION
Eval takes one or more arguments, which together comprise a Tcl script containing one or more commands. Eval concatenates all its argu-
ments in the same fashion as the concat command, passes the concatenated string to the Tcl interpreter recursively, and returns the result
of that evaluation (or any error generated by it). Note that the list command quotes sequences of words in such a way that they are not
further expanded by the eval command.
EXAMPLES
Often, it is useful to store a fragment of a script in a variable and execute it later on with extra values appended. This technique is
used in a number of places throughout the Tcl core (e.g. in fcopy, lsort and trace command callbacks). This example shows how to do this
using core Tcl commands:
set script {
puts "logging now"
lappend $myCurrentLogVar
}
set myCurrentLogVar log1
# Set up a switch of logging variable part way through!
after 20000 set myCurrentLogVar log2
for {set i 0} {$i<10} {incr i} {
# Introduce a random delay
after [expr {int(5000 * rand())}]
update ;# Check for the asynch log switch
eval $script $i [clock clicks]
}
Note that in the most common case (where the script fragment is actually just a list of words forming a command prefix), it is better to |
use {*}$script when doing this sort of invocation pattern. It is less general than the eval command, and hence easier to make robust in |
practice. The following procedure acts in a way that is analogous to the lappend command, except it inserts the argument values at the
start of the list in the variable:
proc lprepend {varName args} {
upvar 1 $varName var
# Ensure that the variable exists and contains a list
lappend var
# Now we insert all the arguments in one go
set var [eval [list linsert $var 0] $args]
}
However, the last line would now normally be written without eval, like this: |
set var [linsert $var 0 {*}$args] |
SEE ALSO
catch(n), concat(n), error(n), interp(n), list(n), namespace(n), subst(n), tclvars(n), uplevel(n)
KEYWORDS
concatenate, evaluate, script
Tcl eval(n)