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From: s/war/peace/g; on 4 Oct 2006 14:50
I'm in the midst of writing a ksh script. I've got a file of junk I
need to manipulate with some hash magic in perl, but I'm trying to keep
the perl code encapsulated in my ksh script. I'm trying to do
something like this...

perl -e 'magic' -i file

But I want the magic to look more like...

perl -e <<EOF
magic
EOF
-i file

This way the code is not cryptic. So far I can not seem to make this
work... am I on crack for thinking I should be able to do something
like this? Any suggestions?

From: Stephane CHAZELAS on 4 Oct 2006 14:59
2006-10-4, 11:50(-07), s/war/peace/g;:
> I'm in the midst of writing a ksh script. I've got a file of junk I
> need to manipulate with some hash magic in perl, but I'm trying to keep
> the perl code encapsulated in my ksh script. I'm trying to do
> something like this...
>
> perl -e 'magic' -i file
>
> But I want the magic to look more like...
>
> perl -e <<EOF
> magic
> EOF
> -i file
[...]

What about

perl -e '
magic
' -i file

Or

perl -e "$(
cat << \EOF
magic
EOF
)" -i file

Or

magic=$(
cat << \EOF
magic
EOF
)

perl -e "$magic" -i file

If your system supports the /dev/fd/<n> thing:

perl /dev/fd/3 -i file 3<< \EOF
magic
EOF

--
St?phane
From: anno4000 on 4 Oct 2006 15:18
s/war/peace/g; <smalder73(a)gmail.com> wrote in comp.lang.perl.misc:
> I'm in the midst of writing a ksh script. I've got a file of junk I
> need to manipulate with some hash magic in perl, but I'm trying to keep
> the perl code encapsulated in my ksh script. I'm trying to do
> something like this...
>
> perl -e 'magic' -i file
>
> But I want the magic to look more like...
>
> perl -e <<EOF
> magic
> EOF
> -i file
>
> This way the code is not cryptic. So far I can not seem to make this
> work... am I on crack for thinking I should be able to do something
> like this? Any suggestions?

You are misunderstanding ksh here documents. They don't return
a string, they supply the given text via standard input. Thus in a
ksh script

perl <<EOF
print "hihi\n";
print "haha\n";
EOF

would print the expected two lines. How well that mixes with -i
I don't know.

Anno
From: s/war/peace/g; on 4 Oct 2006 15:40
TYVM!

I had avoided using the multi line -e ' syntax because I have some
pipes and quotes in my code and other characters the shell seems to
like to interpret... hadn't thought about the cat <<EOF though that's a
neato trick. Many Thanks!

Stephane CHAZELAS wrote:
> 2006-10-4, 11:50(-07), s/war/peace/g;:
> > I'm in the midst of writing a ksh script. I've got a file of junk I
> > need to manipulate with some hash magic in perl, but I'm trying to keep
> > the perl code encapsulated in my ksh script. I'm trying to do
> > something like this...
> >
> > perl -e 'magic' -i file
> >
> > But I want the magic to look more like...
> >
> > perl -e <<EOF
> > magic
> > EOF
> > -i file
> [...]
>
> What about
>
> perl -e '
> magic
> ' -i file
>
> Or
>
> perl -e "$(
> cat << \EOF
> magic
> EOF
> )" -i file
>
> Or
>
> magic=$(
> cat << \EOF
> magic
> EOF
> )
>
> perl -e "$magic" -i file
>
> If your system supports the /dev/fd/<n> thing:
>
> perl /dev/fd/3 -i file 3<< \EOF
> magic
> EOF
>
> --
> Stéphane

From: Tad McClellan on 4 Oct 2006 15:43
anno4000(a)radom.zrz.tu-berlin.de <anno4000(a)radom.zrz.tu-berlin.de> wrote:
> s/war/peace/g; <smalder73(a)gmail.com> wrote in comp.lang.perl.misc:
>> I'm in the midst of writing a ksh script. I've got a file of junk I
>> need to manipulate with some hash magic in perl, but I'm trying to keep
>> the perl code encapsulated in my ksh script. I'm trying to do
>> something like this...
>>
>> perl -e 'magic' -i file
>>
>> But I want the magic to look more like...
>>
>> perl -e <<EOF
>> magic
>> EOF
>> -i file
>>
>> This way the code is not cryptic. So far I can not seem to make this
>> work... am I on crack for thinking I should be able to do something
>> like this? Any suggestions?
>
> You are misunderstanding ksh here documents. They don't return
> a string, they supply the given text via standard input.


they supply the given text right "here" (where the here-doc appears),
hence the name "here document".


--
Tad McClellan SGML consulting
tadmc(a)augustmail.com Perl programming
Fort Worth, Texas
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