want to use Variable as commandline

clsonnt · 10-27-2004, 06:31 PM

I would like to be able to load a commandline into an environmnetal variable and then runn the command using that variable.

It seems to work OK until I get special characters in the commandline. For instance

Code:

REMOVECOMMAND="rm -f $DESTINATIONDIR/$SOURCEHOSTNAME/$TARFILENAME{,.gz}"
$REMOVECOMMAND

runs just fine!! But

Code:

BACKUPCOMMAND="tar -cf $DESTINATIONDIR/$SOURCEHOSTNAME $TARFILENAME $SOURCEDIRECTORY > $DESTINATIONDIR/$SOURCEHOSTNAME/$LISTNAME 2>>$MAILFILE"
$BACKUPCOMMAND

fails!

Looking at the results of "set -x" shows that the redirects are being put in single quotes.

I have tried using

Code:

eval $BACKUPCOMMAND

my "set -x" output looks like this:

Code:

+ eval tar -cf /data2/iwapps2/admin-nitely2.tar /usr/local/admin '>' /data2/iwapps2/admin-nitely2.ls '2>>/root/mailfile-local-nitely-admin'
++ tar -cf /data2/iwapps2/admin-nitely2.tar /usr/local/admin
+ OURCEHOSTNAME/admin-nitely2.ls
+ status=127

I have tried various varations of the eval command and none seem to work. Would appreciate any guidence.

THNX

jlliagre · 10-28-2004, 02:38 AM

eval $variable where variable contain a command with redirections works for me.

Code:

pcjll:/tmp $ cat s
#!/bin/ksh
rm -f /tmp/out /tmp/err
a="date >/tmp/out 2>/tmp/err"
eval $a
ls -l /tmp/out /tmp/err

pcjll:/tmp $ s
-rw-r--r--   1 jlliagre  0 Oct 28 09:35 /tmp/err
-rw-r--r--   1 jlliagre 30 Oct 28 09:35 /tmp/out

clsonnt · 10-28-2004, 11:55 AM

THNX....That lead me to what works!!!