[13232] in Perl-Users-Digest
Perl-Users Digest, Issue: 642 Volume: 9
daemon@ATHENA.MIT.EDU (Perl-Users Digest)
Wed Aug 25 17:16:43 1999
Date: Wed, 25 Aug 1999 14:10:21 -0700 (PDT)
From: Perl-Users Digest <Perl-Users-Request@ruby.OCE.ORST.EDU>
To: Perl-Users@ruby.OCE.ORST.EDU (Perl-Users Digest)
Perl-Users Digest Wed, 25 Aug 1999 Volume: 9 Number: 642
Today's topics:
Q: Automatically entering values when prompted?? <nsyte@netscape.net>
Re: Q: Automatically entering values when prompted?? <jerrad@networkengines.com>
Re: Question about date (Larry Rosler)
Re: Question about date (Matthew Bafford)
Re: recovering the query string while using CGI.pm <jeff@vpservices.com>
Re: rename with ActivePerl <dchristensen@california.com>
Re: Returning an absolute value from a variable <aqumsieh@matrox.com>
Re: script now failing for password protected site <jpeterson@office.colt.net>
semaphore manipulation <otis@my-deja.com>
Re: split inside split - can it be done ? <aqumsieh@matrox.com>
Re: subroutine and arrays (Bart Lateur)
Re: subroutine and arrays <chrisjur@AdProTech.com>
Re: test (Greg Bacon)
Re: textarea problem <ab@cd.com>
The extent of double-quotish interpolation (Alan Curry)
Re: uploading files using multipart/form-data with NT irf@netexecutive.com
Want to try perl-cgi on UNIX thumpsup@my-deja.com
Re: What are valid characters in hash keys <mcking@cajunbro.com>
where command is coming from <ab@cd.com>
Re: where command is coming from (Greg Bacon)
Re: Why $|++ <AgitatorsBand@yahoo.com>
Digest Administrivia (Last modified: 1 Jul 99) (Perl-Users-Digest Admin)
----------------------------------------------------------------------
Date: Wed, 25 Aug 1999 19:06:32 GMT
From: JThornton <nsyte@netscape.net>
Subject: Q: Automatically entering values when prompted??
Message-Id: <7q1erf$8qp$1@nnrp1.deja.com>
I'm using Perl for Win32 to write a simple script that logs on via ftp
to a unix system, and either downloads or uploads a file. I can
complete the script when I learn how to automatically enter values when
prompted. For example, after ftping to the desired IP, I'm prompted for
a username, I need this to be automatically entered, then I need to
automatically enter the password, then I need to automatically enter
the PUT or GET command etc...
I've been using "system" to run the commands, but when using this it
won't automatically enter the value at the first prompt. Should I use a
process or filehandle to do this?
Please help...I do not use Perl on a regular basis.
Thanks.
JThornton
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------------------------------
Date: Wed, 25 Aug 1999 15:24:44 -0400
From: jerrad pierce <jerrad@networkengines.com>
Subject: Re: Q: Automatically entering values when prompted??
Message-Id: <37C442FC.271974E9@networkengines.com>
Well if it's your ftp site, setup an anoymous user, or make it accessible via HTTP.
Also check out LWP, much more efficient than using system
------------------------------
Date: Wed, 25 Aug 1999 12:06:28 -0700
From: lr@hpl.hp.com (Larry Rosler)
Subject: Re: Question about date
Message-Id: <MPG.122dde8d13d867aa989e98@nntp.hpl.hp.com>
In article <7q16ke$q9i$1@pegasus.csx.cam.ac.uk> on 25 Aug 1999 16:46:06
GMT, M.J.T. Guy <mjtg@cus.cam.ac.uk> says...
> In article <FGr85A.Kx1@csc.liv.ac.uk>, I.J. Garlick <ijg@connect.org.uk> wrote:
> >lr@hpl.hp.com (Larry Rosler) writes:
> >>
> >> We discovered this recently:
> >>
> >> On Unix: perldoc -f -- -X
> >
> >I did try that but just got a perldoc usage message, (this is perl
> >5.004_04, which probably explains it).
>
> It's in all current Perls, i.e perl5.004_05 and perl5.005_03 onwards.
>
> >Once you have been bitten by the '-' at the front of a filename problem
> >you never forget about the -- option :-) In my case I was trying to help
> >some one who had reversed the arguments on split in someway and ended up
> >with a file named -
>
> Actually, Larry is wrong here. You don't want the '--' even on Unix.
> Just try
>
> perldoc -f -X
% perldoc -f -X
No documentation for perl function '-X' found
% perldoc -f -- -X
Unknown option: X
...
% perl -v
This is perl, version 5.005_03 built for PA-RISC1.1
...
Now, I'll swear that when I tried 'perldoc -f -- -X' before posting it
on August 7 (<URL:http://x28.deja.com/getdoc.xp?AN=509960850>, I got the
documentation for '-X'. Hmmm. So how *does* one make it work on Unix?
--
(Just Another Larry) Rosler
Hewlett-Packard Laboratories
http://www.hpl.hp.com/personal/Larry_Rosler/
lr@hpl.hp.com
------------------------------
Date: Wed, 25 Aug 1999 20:10:47 GMT
From: *@dragons.duesouth.net (Matthew Bafford)
Subject: Re: Question about date
Message-Id: <slrn7s8heg.q0.*@dragons.duesouth.net>
On Wed, 25 Aug 1999 12:06:28 -0700, Larry Rosler) was attempting to
recharge the laptop battery by typing:
: > Actually, Larry is wrong here. You don't want the '--' even on Unix.
: > perldoc -f -X
:
: % perldoc -f -X
: No documentation for perl function '-X' found
> perldoc -f -X
=item I<-X> FILEHANDLE
=item I<-X> EXPR
=item I<-X>
...
>
: % perldoc -f -- -X
: Unknown option: X
: ...
> perldoc -f -- -X
No documentation for perl function `--' found
>
: % perl -v
:
: This is perl, version 5.005_03 built for PA-RISC1.1
: ...
> perl -v
This is perl, version 5.005_03 built for i686-linux
...
>
> grep -i version $(which perldoc) | head -1
# Version 1.14: Wed Jul 15 01:50:20 EST 1998
>
: (Just Another Larry) Rosler
--Matthew
------------------------------
Date: 25 Aug 1999 18:59:17 GMT
From: Jeff Zucker <jeff@vpservices.com>
Subject: Re: recovering the query string while using CGI.pm
Message-Id: <37C43C09.FA16BB88@vpservices.com>
gmahler@my-deja.com wrote:
>
> In article <37C083DD.9FBD1373@vpservices.com>,
> Jeff Zucker <jeff@vpservices.com> wrote:
> >
> > #!/usr/local/bin/perl -wT
> > use strict;
> > use CGI qw(:standard);
> > my $x = query_string() || '';
> > print header, "[$x]";
> >
>
> When I try the above code, I get an error:
>
> Can't call method "param" without a package or
> object reference at (eval 2) line 4.
I doubt you get that message from that code since that code doesn't call
the method param. If you really do get that error message from that
exact code, what version of CGI.pm are you using?
> Maybe my Perl interpreter is deficient, but like
> I mentioned before, I thought query_string() is
> a method of the CGI class, and so must be associated
> with a CGI object to be called
There are two completely different ways to use CGI.pm: one based on
functions and one based on objects. In my example above, only the
functions are used, there is no object. In the function approach you
write things like $x = query_string() and in the object approach you
write things like $x = $y->query_string(). Notice that the second
format uses the arrow operator -> and the first does not. You probably
don't want to mix and match these two approaches, choose one or the
other. If you were to write the exact same thing as the
function-oriented code cited above using CGI objects instead of
functions, it would look like this:
#!/usr/local/bin/perl -wT
use strict;
use CGI;
my $x = new CGI;
print $x->header(),
"[",
$x->query_string(),
"]",
;
--
Jeff
------------------------------
Date: Wed, 25 Aug 1999 13:35:10 -0700
From: "David Christensen" <dchristensen@california.com>
Subject: Re: rename with ActivePerl
Message-Id: <37c450f6_2@news5.newsfeeds.com>
Christophe:
Likely causes:
1. The pwd isn't what you think it is when rename() is called.
2. Your directory seperator character is getting turned into a
control character somewhere along the way -- beware of saying "\"
when you really mean '\' or "\\".
Perl 5.005_03 (ASi519e) on Win98:
C:\david\code\perl\foo>type foo
#!/fsf/bin/perl -w
print "renaming file1 -> file2 ... ";
print rename ('c:\david\code\perl\foo\file1', 'file2');
print "\n";
print "renaming file2 -> file1 ... ";
print rename ("file2", "c:\\david\\code\\perl\\foo\\file1");
print "\n";
C:\david\code\perl\foo>dir /b
file1
foo
C:\david\code\perl\foo>perl foo
renaming file1 -> file2 ... 1
renaming file2 -> file1 ... 1
C:\david\code\perl\foo>dir /b
file1
foo
HTH,
--
David Christensen
dchristensen@california.com
PS it helps if you post your code and a sample run/ error messages.
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------------------------------
Date: Wed, 25 Aug 1999 13:38:03 -0400
From: Ala Qumsieh <aqumsieh@matrox.com>
Subject: Re: Returning an absolute value from a variable
Message-Id: <x3ywvujwykk.fsf@tigre.matrox.com>
chettah@msn.com ("willow") writes:
> I apologize for asking these questions here, but I don't have perldoc. I
> guess we don't have all of Perl but when I typed that in, it wasn't found.
Eeeek. Then go no further. Re-install the latest version of Perl
complete with documentation. You won't regret it.
Ala
------------------------------
Date: Wed, 25 Aug 1999 15:32:12 GMT
From: Jon Peterson <jpeterson@office.colt.net>
Subject: Re: script now failing for password protected site
Message-Id: <00Uw3.1$RY.273@news.colt.net>
Douglas Galbraith <douglas@home.com> wrote:
> Hello and thanks for the help in advance.
> I use the script below to retrieve data from web sites with passwords.
> The PERL script below worked until last Monday (the web site that it
> accesses was changed that day). Unfortunately, I do not know how to fix
> this script.
> Running this script now produces the error message:
> 416 Requested Range Not Satisfiable
Your script looks fine. It appears the remote server that it talks to has
changed, and is expecting the script to say something different. You will have
to find out more about the changes at the server end before you will be able
to alte your script to operate in the way you want.
------------------------------
Date: Wed, 25 Aug 1999 18:59:53 GMT
From: Otis Gospodnetic <otis@my-deja.com>
Subject: semaphore manipulation
Message-Id: <7q1ef1$8dr$1@nnrp1.deja.com>
Hello,
I'm looking for a perl script or module for handling semaphores (on DEC
UNIX).
So far I found IPC::Semaphore via www.cpan.org search interface, but
that module does not let me manipulate semaphores that other
applications have created, which is what I really need.
Does anyone know of an existing script or any other module that would
allow me to manipulate semaphores?
Thanks,
Otis
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------------------------------
Date: Wed, 25 Aug 1999 13:24:03 -0400
From: Ala Qumsieh <aqumsieh@matrox.com>
Subject: Re: split inside split - can it be done ?
Message-Id: <x3yyaezwz7w.fsf@tigre.matrox.com>
assakhof <assakhof@nospam.mimos.my> writes:
> #********** CUSTOMER[Customer Name-ID987] **********
>
> I want to get
> $cust = Customer Name and
> $id = ID987
>
> My idea is to use split inside split like this; (but it not work)
>
> open (CUST, $custFile) or die "ERROR: Cannot open $custFile";
> while (<CUST>) {
> if (/CUSTOMER/) {
> ($cust,$id) = split(/-/,split(/]/, split (/[/, $_)[1])[0]);
The first argument to split() is a regexp. ['s amd ]'s are special
characters in regexps, and have to be escaped:
($cust, $id) = split /-/ => (split /\]/ => (split /\[/)[1])[0];
> print "$cust:$id\n";
> }
> }
Btw, using a regexp might be easier in this case.
HTH,
Ala
------------------------------
Date: Wed, 25 Aug 1999 19:24:20 GMT
From: bart.lateur@skynet.be (Bart Lateur)
Subject: Re: subroutine and arrays
Message-Id: <37c44202.257872@news.skynet.be>
d!rk caspary wrote:
> sub routine_1 (@A,@B) { ... }
>
> ...
>
> &routine_1 (@X,@Y);
>
>so that @A=@X and @B=@y?
Use prototypes. But:
- do NOT use the ampersand prefix
- the prototype must be known before the call is encountered.
So, do
sub routine_1 (\@\@) {
local(*A,*B) = @_;
#now, access @X through @A, and @Y through @B
...
}
routine_1 (@X,@Y);
or:
sub routine_1 (\@\@);
routine_1 (@X,@Y);
sub routine_1 { # "(\@\@)" is optional
local(*A,*B) = @_;
#now, access @X through @A, and @Y through @B
...
}
Bart.
------------------------------
Date: Wed, 25 Aug 1999 21:07:26 GMT
From: "C.J. Uriarte" <chrisjur@AdProTech.com>
Subject: Re: subroutine and arrays
Message-Id: <iWYw3.17$wb.5038@typhoon1.gnilink.net>
I would say one of the easier ways to do it is to use refs, ie.
if you have sub_routine1, pass it:
sub_routine1(\@A, \@B)
Then you can get the arrays using using something like this:
sub_routine1 {
my ($A, $B) = @_;
@ARRAYA = @$A;
@ARRAYB = @$B;
}
That will pretty much do it for you, but if you are not comfortable with
refs, do a "man perlref" for more details.
Best,
Chris
--------------------------------------------
Christopher Uriarte, AdProTech, LLC.
web: http://www.AdProTech.com
eml: chrisjur@AdProTech.com
pgr: chrisjur@pager.AdProTech.com
web: http://www.cju.com (personal)
tel: (800) 808-2453
--------------------------------------------
d!rk caspary <dirk@leonardo.uni-pc.gwdg.de> wrote in message
news:7q18pc$1anq$1@gwdu67.gwdg.de...
> Hello,
> how can I send more then one array to an subroutine, e.g.
>
> sub routine_1 (@A,@B) { ... }
>
> ...
>
> &routine_1 (@X,@Y);
>
> so that @A=@X and @B=@y?
>
> thanks
>
> d!rk
------------------------------
Date: 25 Aug 1999 19:55:44 GMT
From: gbacon@itsc.uah.edu (Greg Bacon)
Subject: Re: test
Message-Id: <7q1ho0$kui$2@info2.uah.edu>
In article <37C401EA.6B0511B1@networkengines.com>,
jerrad pierce <jerrad@networkengines.com> writes:
: harvard net sucks
Off-topic posts suck.
Greg
--
Windows was created to keep the stoopid people away from Unix, you know.
An "MS advocate" is already beneath contempt.
-- Tom Christiansen
------------------------------
Date: Wed, 25 Aug 1999 14:25:44 -0500
From: "Blair Heuer" <ab@cd.com>
Subject: Re: textarea problem
Message-Id: <7q1g0o$pf5$1@ash.prod.itd.earthlink.net>
Thanks!
I removed the truncation and it all still worked fine, as you said.
And the quotes were causing the problem, and now it is fixed.
Tahnks Again,
Blair Heuer
David Cassell <cassell@mail.cor.epa.gov> wrote in message
news:37C32B08.45E6E0EA@mail.cor.epa.gov...
> Blair Heuer wrote:
> >
> > I have a script that opens a text file, and then puts that text file
into a
> > list with this code:
> >
> > open(FILE,"$in{'loc'}\\$in{'current'}"); #
> > "$in{'loc'}\\$in{'current'}" is the location of the file.
>
> You really ought to check the return value on any open(). And
> inside Perl you can use forward slashes in there, even on
> win32 systems.
>
> open(FILE,"$in{'loc'}/$in{'current'}") or die "Can't open: $!\n";
>
> > @file = <FILE>;
>
> This is reaosnable if FILE is never large, but you will
> often want to do this line-by-line instead.
>
> > close FILE;
>
> And you ought to check the return here too.
> As well as on the open() and close() below.
>
> > chomp @file;
> >
> > Then that is put into the textarea in the html file like so, which shows
up
> > just as it is in the file:
> >
> > <textarea>@file</textarea>
> >
> > Then when saved, the returned input is stored like so:
> >
> > open(FILE,">$in{'loc'}\\$in{'current'}");
> > truncate(FILE, 0);
>
> The truncate isn't needed. You open()ed the file for
> write-only, so it gets over-written.
>
> > print FILE "@file";
>
> print FILE @file;
>
> > close FILE;
>
> Putting unneeded quotes around variables isn't a good idea.
> Here, putting quotes around an array in a print() statement
> causes spaces to be inserted between elements (which here are
> your lines).
>
> HTH,
> David
> --
> David Cassell, OAO cassell@mail.cor.epa.gov
> Senior computing specialist
> mathematical statistician
------------------------------
Date: Wed, 25 Aug 1999 20:55:06 GMT
From: pacman@defiant.cqc.com (Alan Curry)
Subject: The extent of double-quotish interpolation
Message-Id: <KKYw3.24595$x04.1456615@typ11.nn.bcandid.com>
I find that double-quotish interpolation is not easy to predict. The
following sample program surprised me at least twice. If anyone can
successfully predict its output before trying it, I'd like to know how you
did it.
#!/usr/bin/perl -wl
use strict;
my @a=(1000, 10, 20, 30, 40, 50, 60);
my $i=2;
my $f=sub { return 4 };
my $r=\@a;
print "$i";
print "$a[0]";
print "@a";
print "$i+1";
print "$a[$i+1]";
print "$a[$i+1]+1";
print "$f->()+1";
print "$r->[1]";
print "$a[$f->()+1]+1";
print "@a[2..$f->()]";
__END__
--
Alan Curry |Declaration of | _../\. ./\.._ ____. ____.
pacman@cqc.com|bigotries (should| [ | | ] / _> / _>
--------------+save some time): | \__/ \__/ \___: \___:
Linux,vim,trn,GPL,zsh,qmail,^H | "Screw you guys, I'm going home" -- Cartman
------------------------------
Date: Wed, 25 Aug 1999 20:52:46 GMT
From: irf@netexecutive.com
Subject: Re: uploading files using multipart/form-data with NT
Message-Id: <7q1l2o$dp5$1@nnrp1.deja.com>
before when you get your data from STDIN, on NT, set it to
binary mode:
binmode(STDIN);
then when you write to the filehandle,
binmode(STDOUT);
windows distinguishes b/w ascii and binay, and will alter
your binary data unless you use the above.
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Share what you know. Learn what you don't.
------------------------------
Date: Wed, 25 Aug 1999 20:23:18 GMT
From: thumpsup@my-deja.com
Subject: Want to try perl-cgi on UNIX
Message-Id: <7q1jb7$cc1$1@nnrp1.deja.com>
Hi,
I am learning to write a perl-cgi programs. I work in the windows/PC
environment and want to know if there is any free unix server available
somewhere where I can upload my Unix Perl programs to test them and see
the output in my windows browser. If you know any, please let me know
how it works.
thanks
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Share what you know. Learn what you don't.
------------------------------
Date: Wed, 25 Aug 1999 20:52:36 +0000
From: Mark McCoy <mcking@cajunbro.com>
Subject: Re: What are valid characters in hash keys
Message-Id: <37C45794.C2AC828A@cajunbro.com>
Larry Rosler wrote:
>
> In article <37BDC174.E4E3132F@cajunbro.com> on Fri, 20 Aug 1999 20:58:28
> +0000, Mark McCoy <mcking@cajunbro.com> says...
> > Roger Musson wrote:
> > >
> > > $hash{key}='some_value';
> > >
> > > What are the valid characters for 'key'
> > >
> > > I can't find any reference to this anywhere, all examples use
> > > alphanumeric.
> ...
> > I believe it is the same as for the variable names themselves, no
> > "@$%[]{}<>()..." (unless you want to spend the whole time escaping the reserved
> > characters)
>
> There are no reserved characters.
>
> > Stick with alphanumeric and you will be ok.
>
> Yes, you will, but you are totally wrong about this. Absolutely any
> string will do, including even the null string "".
>
> --
> (Just Another Larry) Rosler
> Hewlett-Packard Laboratories
> http://www.hpl.hp.com/personal/Larry_Rosler/
> lr@hpl.hp.com
You are _technically_ correct, but I doubt anyone would really want to use '',
'$_', '@foo', '()', etc... as hash keys! I would like to see _you_ write a
fairly detailed (i.e. lengthy) script that uses keys such as these!
--
Mark McCoy -- Cajun Brothers Technology, llc
Proud to run Linux since February 1996
This message posted from snowdog, a 100% MS-free machine.
The views in this message do not necessarily reflect the views of my employer
------------------------------
Date: Wed, 25 Aug 1999 14:12:13 -0500
From: "Blair Heuer" <ab@cd.com>
Subject: where command is coming from
Message-Id: <7q1f78$obj$1@ash.prod.itd.earthlink.net>
How can I check to make sure the document that sent form to my script, is
not one other than the one I made?
If I could get the url of the file from which the form was sent, then I
could check to make sure it was the same, so that people do not edit the
files hidden inputs (if they do, it will cause a huge security issue...
anyone can freely go throughout my computer and read/delete/etc whatever
they want).
How do I find out the whole URL of the refering page? It can't be just the
domain/ip of the page, b/c this is a homepage script, so people could easily
make their own home page with the edited form inputs.
Just say that the script is located at http://255.255.255.255/cgi-bin/ghs.pl
Thanks,
Blair Heuer
------------------------------
Date: 25 Aug 1999 19:58:45 GMT
From: gbacon@itsc.uah.edu (Greg Bacon)
Subject: Re: where command is coming from
Message-Id: <7q1htl$kui$3@info2.uah.edu>
In article <7q1f78$obj$1@ash.prod.itd.earthlink.net>,
"Blair Heuer" <ab@cd.com> writes:
: If I could get the url of the file from which the form was sent, then I
: could check to make sure it was the same, so that people do not edit the
: files hidden inputs (if they do, it will cause a huge security issue...
: anyone can freely go throughout my computer and read/delete/etc whatever
: they want).
Do you have a Perl question at all? If you have CGI questions, maybe
you should find a newsgroup that, I don't know, has CGI in its name.
Maybe I'm just crazy.
Greg
--
Don't worry about people stealing your ideas. If your ideas are any good,
you'll have to ram them down people's throats.
-- Howard Aiken
------------------------------
Date: Wed, 25 Aug 1999 20:28:55 GMT
From: Scratchie <AgitatorsBand@yahoo.com>
Subject: Re: Why $|++
Message-Id: <bmYw3.212$1k5.61083@news.shore.net>
Abigail <abigail@delanet.com> wrote:
: Why "$|++;"? I've seen this before, and frankly, it baffles me why
: someone would want to use this instead of "$| = 1;".
Easier to type and, if you're used to it, easier to read. You might even
argue that it's more esthetically appealing.
--Art
--
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------------------------------
Date: 1 Jul 99 21:33:47 GMT (Last modified)
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Subject: Digest Administrivia (Last modified: 1 Jul 99)
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to almanac@ruby.oce.orst.edu with the command "send perl-users x.y",
where x is the volume number and y is the issue number.
The Meta-FAQ, an article containing information about the FAQ, is
available by requesting "send perl-users meta-faq" from
almanac@ruby.oce.orst.edu. The real FAQ, as it appeared last in the
newsgroup, can be retrieved with the request "send perl-users FAQ" from
almanac@ruby.oce.orst.edu. Due to their sizes, neither the Meta-FAQ nor
the FAQ are included in the digest.
The "mini-FAQ", which is an updated version of the Meta-FAQ, is
available by requesting "send perl-users mini-faq" from
almanac@ruby.oce.orst.edu.
For other requests pertaining to the digest, send mail to
perl-users-request@ruby.oce.orst.edu. Do not waste your time or mine
sending perl questions to the -request address, I don't have time to
answer them even if I did know the answer.
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End of Perl-Users Digest V9 Issue 642
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