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In article <16289@s.ms.uky.edu> kherron@ms.uky.edu (Kenneth Herron) writes:
>line="this is 'a test'"
>
>for word in $line
>do
>	echo $word
>done
>
>I *want* it to produce:
>this
>is
>a test

Try something like this:

$ IFS='
'
$ line='this
is
a test'
$ for i in $line
> do
> echo $i
> done
this
is
a test
$ ...


--
Paul Falstad, pfalstad@phoenix.princeton.edu PLink:HYPNOS GEnie:P.FALSTAD
I would bring back hanging, and go into rope.  I would cut off the more
disreputable parts of the body and use the space for playing fields.

In article <16289@s.ms.uky.edu> kherron@ms.uky.edu (Kenneth Herron) writes:
>I'm having a problem with quoting in shell scripts, exemplified by
>the following:
>
>line="this is 'a test'"
>
>for word in $line
>do
>	echo $word
>done
>
>I *want* it to produce:
>this
>is
>a test

For ksh, you can use an array:

	$ set -A  line  this is 'a test'
	$ for word in "${line[@]}"
	$ do
	$   echo $word
	$ done
	this
	is
	a test

Watch out though, in early version of ksh (earlier than ksh 11/16/88a)
using set -A will ALSO clobber your positional parameters ($1, $2, $*, $@)
and set them to the contents of your array in addition to setting your array.
If you have such a version of ksh you MAY have to do:

	$ set -A argv "$@"                         ## save $@
	$ set -A  line  this is 'a test'           ## set my array
	$ set --  "$@"                             ## restore $@

For sh, there are all sorts of tricks you can use but they are just that,
tricks. In the Bourne shell only "$@" preserves whitespace/IFS characters
in its arguments (whereas "${array[@]}" preserves whitespace/IFS characters
in ksh arrays).

A common Bourne shell trick is:

	$ line1=this
	$ line2=is
	$ line3='a test'

	$ i=0
	$ while [ $i -lt 3 ] ; do
	$   i=`expr $i + 1`
	$   eval echo \$line$i
	$ done
	this
	is
	a test

There are other "obscure" Bourne shell trick as well!
Hope this helps!
______________________ "And miles to go before I sleep." ______________________
 Brad Appleton           brad@ssd.csd.harris.com       Harris Computer Systems
                             uunet!hcx1!brad           Fort Lauderdale, FL USA
~~~~~~~~~~~~~~~~~~~~ Disclaimer: I said it, not my company! ~~~~~~~~~~~~~~~~~~~

In article <16289@s.ms.uky.edu> kherron@ms.uky.edu (Kenneth Herron) writes:
>	line="this is 'a test'"
>	...
>I *want* it to produce:
>this
>is
>a test

Nice challenge.  I finally got it, and you don't have to change things
as dramatically as other people had posted.  My method works like this:

	line='this is "a test"'
	eval set -- $line
	for word
	do
		echo $word
	done

I couldn't figure out how to get eval to work like this:

	eval for word in $line
	...

I'm gonna start calling myself "The Shell Answer-man".

Paul Chamberlain | I do NOT represent IBM.     tif@doorstop, sc30661 at ausvm6
512/838-7008     | ...!cs.utexas.edu!ibmchs!auschs!doorstop.austin.ibm.com!tif

In article <4101@awdprime.UUCP> tif@doorstop.austin.ibm.com (Paul Chamberlain) writes:
>
>I couldn't figure out how to get eval to work like this:
>
>	eval for word in $line
>	...
>
you hafta do this:

	eval "for word in $line; do echo \$word; done"

works for bash and sh, don't have a ksh to try it on.

>I'm gonna start calling myself "The Shell Answer-man".

--
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In article <4101@awdprime.UUCP> tif@doorstop.austin.ibm.com (Paul Chamberlain) writes:
>In article <16289@s.ms.uky.edu> kherron@ms.uky.edu (Kenneth Herron) writes:
>>	line="this is 'a test'"
>>	...
>>I *want* it to produce:
>>this
>>is
>>a test
>
>Nice challenge.  I finally got it, and you don't have to change things
>as dramatically as other people had posted.  My method works like this:
>
>	line='this is "a test"'
>	eval set -- $line
>	for word
>	do
>		echo $word
>	done
>
This is fine and dandy except that you have now LOST your positional parameters
(and if you are in a script - you may still need them). Furthermore - saving
your parameters first by doing something like:

	save_args="$*"

Is no help because now you will need to exercise some even fancier footwork to
get the parameters back the way they were if any contained IFS characters.

Like I said before - if you have the Korn shell, this is all *very* simple
if you create an array using "set -A" (or "set +A") and iterate your for-loop
based on "$array[@}" (the quotes are needed here). If you are using the
Bourne shell AND no longer need your postional parameters, then the method
described above will suit you just fine - If you still need the positional
positonal parameters (with sh) though - you'd better find another way (two
have been posted already).

______________________ "And miles to go before I sleep." ______________________
 Brad Appleton           brad@ssd.csd.harris.com       Harris Computer Systems
                             uunet!hcx1!brad           Fort Lauderdale, FL USA
~~~~~~~~~~~~~~~~~~~~ Disclaimer: I said it, not my company! ~~~~~~~~~~~~~~~~~~~