[SOLVED] How to assign a variable in csh shell for this specific situation?

[newbie01]

Dear All,

Thanks for reading my thread. My problem is the following:

I have a command, for example, mycommand. After running this command one has as string like 'my string'. 'my string' depends on some variables so that it is not a constant.
Now I want to assign myvar = 'my string', how do I do that?

what I tried is:

1/
(echo -n set myvar =; mycommand)>out
eval out
echo $myvar
2/
(echo -n set myvar =; mycommand)>out
chmod +x out
./out
echo $myvar

but both of them do not work.

Could you please help me with this problem?

Thank you in advance.

N

[drl]

Hi.

The special quote mark, " ` ", also called a backtic can be used. On many keyboards it is found upper left, on the same key as the tilde, " ~ ". One uses it in both sh and csh families to run a command and substitute the output:

#!/usr/bin/env tcsh

# @(#) s1	Demonstrate setting variable to output from command.

echo
setenv LC_ALL C ; setenv LANG C
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility version)"
sh -c "version >/dev/null 2>&1" && version "=o" tcsh
echo

set myvar = `date`
echo " date is $myvar"

exit 0

producing:

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility version)
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
tcsh 6.14.00

 date is Sat Oct 24 05:43:52 CDT 2009

See man csh. Best wishes ... cheers, drl

[newbie01]

Hi.

The special quote mark, " ` ", also called a backtic can be used. On many keyboards it is found upper left, on the same key as the tilde, " ~ ". One uses it in both sh and csh families to run a command and substitute the output:

#!/usr/bin/env tcsh

# @(#) s1	Demonstrate setting variable to output from command.

echo
setenv LC_ALL C ; setenv LANG C
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility version)"
sh -c "version >/dev/null 2>&1" && version "=o" tcsh
echo

set myvar = `date`
echo " date is $myvar"

exit 0

producing:

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility version)
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
tcsh 6.14.00

 date is Sat Oct 24 05:43:52 CDT 2009

See man csh. Best wishes ... cheers, drl

Hi drl,
It perfectly works. Thanks a lot.
Have a nice day.
N