-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 27, 2002 6:16 PM
To: Beginners Perl Mailing List
Subject: RE: Testing for filehandles
On Wed, 27 Mar 2002, Bob Showalter wrote:
You can pass a filehandle glob to IO::Handle::opened
On Thu, 28 Mar 2002, Bob Showalter wrote:
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Thanks, Bob! After reading the IO::Handle man page, I decided
to distill this approach a bit further:
print F if fileno(F);
Of course, that's even simpler! Just to be nitpicky, the test
You'd probably have better luck testing for the open() command's success
use Getopts::Std;
getopts(n);
if($opt_n){
open(OPT_LOG,/tmp/foo.txt) || die Could not open foo.txt!\n;
}
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 27, 2002
On Wed, 2002-03-27 at 15:18, [EMAIL PROTECTED] wrote:
Hello, All:
I've looked around for an answer to this (The Camel Book, The Ram Book,
perldoc, google.com, etc.) but can't find a thing: Is it possible to test
for the existence of a filehandle?
I've got a small script that optionally
Tim:
I know, I know: I excluded the or die portion for
readability/simplicity.
On Wed, 27 Mar 2002, Timothy Johnson wrote:
You'd probably have better luck testing for the open() command's success
I wrote:
use Getopts::Std;
getopts(n);
open(OPT_LOG,/tmp/foo.txt) if ($opt_n);
while () {
Mailing List
[EMAIL PROTECTED]
Sent: Wednesday, March 27, 2002 1:32 PM
Subject: RE: Testing for filehandles
You'd probably have better luck testing for the open() command's success
use Getopts::Std;
getopts(n);
if($opt_n){
open(OPT_LOG,/tmp/foo.txt) || die Could not open foo.txt!\n
, 2002 1:46 PM
To: Timothy Johnson; Beginners Perl Mailing List
Subject: Re: Testing for filehandles
How would that work with use strict;? I tried it once and when I declared my
$opt_n before using getopts, it wouldn't work.
Agustin Rivera
Webmaster, Pollstar.com
http://www.pollstar.com
On Wed, 27 Mar 2002, Agustin Rivera wrote:
How would that work with use strict;? I tried it once and when I declared my
$opt_n before using getopts, it wouldn't work.
Agustin:
From the Getopt::Std man page:
Note that, if your code is running under the recommended
`use strict
]
Sent: Wednesday, March 27, 2002 1:32 PM
Subject: RE: Testing for filehandles
You'd probably have better luck testing for the open() command's success
use Getopts::Std;
getopts(n);
if($opt_n){
open(OPT_LOG,/tmp/foo.txt) || die Could not open foo.txt!\n;
}
-Original
On 27 Mar 2002, Chas Owens wrote:
Getopt::Std creates the $opt_n variables. To use it with use strict; in
place you must use the use vars ($opt_n); pragma as well. or just use
the getopts('n', \%opts); call. Then you can say $opts{n}.
Agustin:
Also from the Getopt::Std man page:
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 27, 2002 3:18 PM
To: Beginners Perl Mailing List
Subject: Testing for filehandles
Hello, All:
I've looked around for an answer to this (The Camel Book, The
Ram Book,
perldoc,
Owens [EMAIL PROTECTED]
To: Agustin Rivera [EMAIL PROTECTED]
Cc: Beginners Perl Mailing List [EMAIL PROTECTED]
Sent: Wednesday, March 27, 2002 1:51 PM
Subject: Re: Testing for filehandles
Getopt::Std creates the $opt_n variables. To use it with use strict; in
place you must use the use vars ($opt_n
On Wed, 27 Mar 2002, Agustin Rivera wrote:
Ok, I've tried it both ways and it returns 1 (true) as the value. What am I
doing wrong?
Agustin:
1. What *exactly* do you mean both ways?
2. References...
From the Getopt::Std man page:
getopt('oDI'); # -o, -D -I take arg. Sets
On Wed, 27 Mar 2002, Bob Showalter wrote:
You can pass a filehandle glob to IO::Handle::opened():
Thanks, Bob! After reading the IO::Handle man page, I decided to distill
this approach a bit further:
print F if fileno(F);
--
Eric P.
Los Gatos, CA
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