sed command in unix

[SoundTheSurrender]

I'm trying to use the sed command in unix with variables. It takes my input but doesn't export the changes over. Obviously I have to get rid of the slashes but everything I've tried doesn't work. Does SED only work with manually enter words to look for and change? I need it to use variables. If that's not possible, what would be the best way to go about this?

#! /bin/csh

# Check to make sure the testfile exists

set list="testfile"

if ( -e $list) then
echo $list exists
else
echo $list does not exit
endif

# End Check to make sure the testfile exists

# Read each mispelled word
foreach name (`ispell -l < testfile`)
echo "'$name' is mispelled."
#Correct it
echo Correct the spelling
set name1 = $<

echo Name $name
# The echo command above and below just check to see if variables exist
echo Name1 $name1

# Replace the word inputted in name1 with the incorrect spelling of name
#sed -e 's/$name1/$name/g' < testfile > testfile.tmp
sed -e 's/$name/$name1/g' < testfile > testfile.tmp




/****** testfile

The dog is deadd

 

[Brazen]

you need to put brackets around your variables like this: ${name1} and ${name}

so your sed line would be like this:
sed -e 's/${name}/${name1}/g' < testfile > testfile.tmp

The only other thing is I'm not sure (I am a sed novice) that you can do the redirection with testfile the way you are. I think I've done it like this before:

cat testfile | sed -e 's/${name}/${name1}/g' > testfile.tmp

 

[SoundTheSurrender]

Thanks for the reply but it doesn't seem to work 🙁

just keeps everything the same.

Thanks

 

[Nothinman]

Along the same lines as what Brazen said, are you sure the right sed command is even being run? It sounds like what you're asking is more of a csh question than sed since it's csh that's supposed to handle the variables and run sed for you.

 

[Brazen]

oops, didn't realize he was using csh. I'm not sure about variable handling with csh; what I said would apply to BASH.

 

[SoundTheSurrender]

Damn 🙁

ya it's csh..

lx:~/assn3> ./wordfile
testfile exists
'deadd' is mispelled.
dead <---------My input
Name deadd
Name1 dead
lx:~/assn3> cat testfile.tmp
The dog is deadd
lx:~/assn3> cat testfile
The dog is deadd
lx:~/assn3>

 

[Brazen]

Also, in BASH anyway, variables will not be resolved when inside single quotes. So:

sed -e 's/${name}/${name1}/g'

would actually have to be:

sed -e "s/${name}/${name1}/g"

And keep in mind since it is in csh, I don't know if you need the brackets around the variables or not.