05-17-2017
Not sure I understand what you're after, and not sure either if that sort of redirection is the best way to do what you want.
You might want to try using eval to evaluate / expand variable twice, but this has its imponderabilia attached to it and may become dangerous, so be sure what exactly you're doing.
Another option is a sort of redirection that ksh offers, using ${!vname} expansion.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
While concatenating 2 values, one which expanded to fixed width & other not, I am not getting value expanded as fixed width.
Following is script for the same :
#!/bin/sh
var1="abc"
var2="def"
var1Fxd=`echo $var1 | awk '{printf("%-6s",$0)}'`
echo $var1Fxd""$var2
But, if I try -
echo... (2 Replies)
Discussion started by: videsh77
2 Replies
2. UNIX for Dummies Questions & Answers
hi
the code i ve written is as follows:
command="egrep ',100,|,200,' | wc -l"
count =`cat trial.txt | $command`
echo "$count"
the contents of
trial.txt is :
000,100,200,300,
001,200,100,201,
002,200,100,400,
i need to get the count using the command stored in a variable and using... (2 Replies)
Discussion started by: Syms
2 Replies
3. Shell Programming and Scripting
Hi all,
I want to search for a data type in a line.For this in a loop i am checking for $DATA_TYPE in a line using grep.But grep is not able to find when i give this.
Can any one tell me how to check string in $DATA_TYPE variable in line usign grep (or) any other way to do the above task.
... (4 Replies)
Discussion started by: jisha
4 Replies
4. Linux
Hi all,
I have a variable with date as 20080831 . Now I want to increment it as 20080901 and so on.Is there any command for this. Please help me.
thanks
rameez (1 Reply)
Discussion started by: rameezrajas
1 Replies
5. Shell Programming and Scripting
Greetings,
I've visited this forums for a long time and normally got an right answer but this time my problem doesn't seem to go away. What I'm trying to do is the following:
VAR="\n\nline1\nline2\nline3\nline4\nline5\nline6\nline7\n\n"
(The count of newlines is varying!)
If I echo this i... (3 Replies)
Discussion started by: ph1l
3 Replies
6. Shell Programming and Scripting
Hi all,
I have a variable say var1 (output from somewhere, which I can't change)which store something like this:
echo $var1
name=fred
age=25
address="123 abc"
password=pass1234
how can I make the variable $name, $age, $address and $password contain the info?
I mean do this in a... (1 Reply)
Discussion started by: freddy1228
1 Replies
7. Shell Programming and Scripting
I have a user name that is stored in variable $i
and i want to use that user's home dirctor in case command
something like this
find ~"$i" |while read p
do
case "$p" in
( ~"$i"/myDir )
echo "$p"
;;
(*)
esac
done
but it doesn't work
some help please (7 Replies)
Discussion started by: testman84
7 Replies
8. Shell Programming and Scripting
can anyone please help me with this:
i have written a shell script and a stored procedure which has one OUT parameter. now i want to use that out parameter as an input to the unix script but i am getting an error as variable not found. below are the unix scripts and stored procedure...
... (4 Replies)
Discussion started by: swap21783
4 Replies
9. Red Hat
hey, i have stored values of query like this
val_2=$( sqlplus -s rte/rted1@rel75d1 << EOF
set heading off
select source_id from cvt_istats where istat_id > $val_1;
exit
EOF
)
echo $val_2
now , val_2 has five values displayed like this
1
2
3
4
5
what i have to do is to check the... (1 Reply)
Discussion started by: ramsavi
1 Replies
10. Shell Programming and Scripting
Hi All,
I have below variable,
xyz=\$AI_XFR
Now, if you will run the below command
=> echo $xyz
$AI_XFR
It is returning hardcoded string value.
Whereas in environment, there is value in it. Like below:
=> echo $AI_XFR
/home/aditya/sandbox/xfr/
I need to resolve this... (4 Replies)
Discussion started by: adgangwar
4 Replies
LEARN ABOUT OPENSOLARIS
escape
escape(1) Mail Avenger 0.8.3 escape(1)
NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO
avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)