topic using <STDIN> in PERL in Operating System - OpenVMS

using in PERL

Barry McClintock — Thu, 17 Mar 2005 12:35:49 GMT

I have a PERL routine which takes input from . Run standalone...eg "PERL works fine.

However, I need to call the PERL routine from a DCL procedure...in this situation doesn't take input from the keyboard....how can I define SYS$INPUT/SYS$COMMAND so that STDIN will work in this circumstance?

Re: using in PERL

Hein van den Heuvel — Thu, 17 Mar 2005 13:11:01 GMT

Hmmm, works fine for me by doing nothing special.
For example a file tmp.com containing:

$ create tmp.pl
$deck
$param=shift @ARGV;
while () {
print "hello : $param : ".$_;
}
$eod
$ perl tmp.pl xyz
aap
noot
mies
$delete tmp.pl.
$exit

$ @tmp
hello : xyz : aap
hello : xyz : noot
hello : xyz : mies

Now if you wanted the input to come from the terminal that started the command file, then you have to tell DCL that with:
$define/user sys$input sys$command

This is NOT speecific to perl, but standard practice for any DCL command file.
The whole solution then becomes:

$ type tmp.com
$ create tmp.pl
$deck
$param=shift @ARGV;
while () {
print "hello : $param : ".$_;
}
$eod
$define/user sys$input sys$command
$perl tmp.pl xyz
$delete tmp.pl.
$exit

And runs as:

$ @tmp
aap
hello : xyz : aap
noot
hello : xyz : noot
mies
hello : xyz : mies
$

hth,
Hein.

Re: using in PERL

Jan van den Ende — Thu, 17 Mar 2005 13:13:56 GMT

Barry,

Already tried

$ DEFINE SYS$INPUT SYS$COMMAND
?

Just meaning, equate the SYS$INPUT (which I guess would be called stdin in the *IXian parlance used by perl) to SYS$COMMAND (the master command level; in interactive sessions equated to the keyboard).

For single-image activities this can be defined /USER_MODE ; if not, then do not forget to DEASSIGN !!

hth

Proost.

Have one on me.

Jan

Re: using in PERL

Jan van den Ende — Thu, 17 Mar 2005 13:23:18 GMT

Barry,

obviously you were helped well in your question about C header files.

Maybe you should take the time to thank those who helped by assigning some points.

For the "WHY?" and "HOW?", please see:
http://forums1.itrc.hp.com/service/forums/helptips.do?#28

PS. you will have to re-open the thread before you can give points. Afterwards you can close it again.

Proost.

Have one on me.

Jan

Re: using in PERL

Barry McClintock — Thu, 17 Mar 2005 15:30:57 GMT

thanks again...I had gotten this but greatly appreciate your prompt reply.

Barry