I'd suggest not using eval at all, just code your own allowed expansions e.g.:
So here we support $var and not $(command)
OK, so I understand what expand=${expand:1} is doing (cannot do anything but manipulate variable in variable substitution), but what does expand=${!expand} do?
Im facing problem in assigning value of eval array variable as normal variable..
x=0
eval DATA${x}="FJSVcpcu"
x=`expr $x + 1`
eval DATA${x}="FJSVcsr"
if x=0, type -> eval echo \$DATA$x , its give me FJSVcpcu
i want assign this value into an variable as
variable=`eval echo... (3 Replies)
Hello,
I have a script that does an scp to a server and then gets the number of process running on that server, the o/P should be stored in a variable for further processing
eval `echo "ssh -q $Infa_user@$host 'csh -c $CMD '"`
where
CMD="ps -ef | grep -i ${INFA_REPO} | grep -v grep | wc... (2 Replies)
Help !!
First, Thanks in Advance
Here is what I have
I have an environment Variable, let's call it v_VALUE.
v_VALUE="\$ORACLE_HOME/bin" Hence, the location is ORACLE_HOME is not evaluated. ORACLE_HOME happens to be /app/oracle/product/10.1.2
I need a method of returning the... (1 Reply)
Hi,
i have an issue with eval and variable assignment.
1) i have a date value in a variable and that date is part of a filename,
var1=20100331
file1=${var1}-D1-0092.xml.zip
file2=${var2}-D2-0092.xml.zip
file3=${var3}-D3-0092.xml.zip
i am passing the above variables to a script via... (11 Replies)
Hi Gurus,
I am having 2 parameters as below
parm1=value1
parm2=parm1
I want to evaluate parm1 value using eval echo \$$parm2 and later i want to assign this value to other variable which i will be using in if statement like :
if ]; then
do this.......
fi
could you please suggest... (5 Replies)
According to the POSIX specifications eval is a special shell built-in, which should imply that variable assignments specified together with it should remain in effect after the built-in completes. Thus one would expect IFS to be changed after this:
var=$'a\nb c'
$ IFS=$'\n' eval '
for i in... (4 Replies)
background : Solaris, ksh
metresult="ooo
> pp"
ts=89
eval append_${ts}="$metresult"
bash: pp: command not found
I want to create a variable which has in a part of its name a dynamically-established number (stored in another variable) usually I do this with eval command. The problem I... (5 Replies)
pattern1=book
{
x=1
eval echo \$pattern$x
}
book (this is the output)
But when I assign a variable to the output of the eval it doesn't work unless I prefix 2 times backslash before $ as shown below.
{
a=`eval echo \\$pattern$x`
echo $a
}
book
Why here twice "\" has to be... (3 Replies)
Discussion started by: ravisingh
3 Replies
LEARN ABOUT SUSE
text::tabs
Text::Tabs(3pm) Perl Programmers Reference Guide Text::Tabs(3pm)NAME
Text::Tabs -- expand and unexpand tabs per the unix expand(1) and unexpand(1)SYNOPSIS
use Text::Tabs;
$tabstop = 4; # default = 8
@lines_without_tabs = expand(@lines_with_tabs);
@lines_with_tabs = unexpand(@lines_without_tabs);
DESCRIPTION
Text::Tabs does about what the unix utilities expand(1) and unexpand(1) do. Given a line with tabs in it, expand will replace the tabs
with the appropriate number of spaces. Given a line with or without tabs in it, unexpand will add tabs when it can save bytes by doing so
(just like "unexpand -a"). Invisible compression with plain ASCII!
EXAMPLE
#!perl
# unexpand -a
use Text::Tabs;
while (<>) {
print unexpand $_;
}
Instead of the "expand" comand, use:
perl -MText::Tabs -n -e 'print expand $_'
Instead of the "unexpand -a" command, use:
perl -MText::Tabs -n -e 'print unexpand $_'
LICENSE
Copyright (C) 1996-2002,2005,2006 David Muir Sharnoff. Copyright (C) 2005 Aristotle Pagaltzis This module may be modified, used, copied,
and redistributed at your own risk. Publicly redistributed modified versions must use a different name.
perl v5.12.1 2010-04-26 Text::Tabs(3pm)