[TriLUG] HERE document question

[Joseph Mack NA3T]

Here's my script

#!/bin/bash
.
.
partition=/dev/sda1

cat > restore.sh << EOF
 	count=`df | grep -c $partition`
EOF
# ----end script

if $partition is not mounted at the time the generating 
script is run, then the output is

count=0

I want the HERE document to be

count=`df | grep -c /dev/sda1`

so that the mount state is determined at the time the HERE 
document is run, not at the time the HERE document is 
generated. (There HERE document has other variables whose 
value should be substituted at the time the file is 
generated.)

if instead I stop substitution by using the construct

cat > restore.sh <<\EOF
 	count=`df | grep -c $partition`
EOF

the HERE document then is the literal line above

 	count=`df | grep -c $partition`

which requires me to get the value of $partition into the 
HERE document somehow.

I've tried a few other variations eg

command="df | grep -c $partition"
count=`eval $command`

where `eval $command` comes out null in the HERE document

Any ideas?

Thanks Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!