Subject:
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Re: perl file copy question
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Wed, 5 Oct 2005 21:50:18 GMT
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Viewed:
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5901 times
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In lugnet.off-topic.geek, Larry Pieniazek wrote:
> I have a need from within a perl module to copy a large (and variable, it's
> wildcard driven) number of files from one directory to another. TMTOWTDI of
> course. What's the best way under the following constraints?
>
> - the OS is linux
> - The wildcard varies from run to run so it's going to need to be a variable
> (that seems like no big deal at all just mentioning it)
> - I want to avoid system() or backtick, as I do not want to spawn a subprocess,
> too expensive in the context I am in
> - I prefer not to schlep around with digging up filenames and separating them
> from the directories from what glob returned
> - I prefer to use only standard perl and the default module set, not stuff I'll
> have to install, getting stuff installed is a major pain (it took months to get
> DBI and DBD onto the production systems)
>
>
> I thought of using glob($wildcardExpression) to get an array of filehandles and
> then using File::Copy but where I broke down there is that copy wants two
> filehandles or file names and the target names aren't individually known,
> necssarily, unless I dug into the filehandle to find the name, then separated
> the directory off or something.
Try File::NCopy (although I dont think it's a standard module) -
http://search.cpan.org/~gabor/File-NCopy0.32/lib/File/NCopy.pm
Note however that you can easily obtain directory and filename from the path
string - you don't need the file handle (I'm pretty sure File::Basename is
standard):
use File::Basename;
$fullname = "/usr/local/src/perl-5.6.1.tar.gz";
$file = basename($fullname);
# file="perl-5.6.1.tar.gz"
$dir = dirname($fullname);
# dir="/usr/local/src"
> This is something that seems easy in .sh or .ksh. I bet it's easy here too I'm
> just not finding it, although I have been reading docs and searching for it for
> a while.
It is easy - if you're able to call the OS. The OS is, after all, designed as a
program for handling files. But without that as an option, it becomes harder.
HTH
ROSCO
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Message has 1 Reply:
 | | Re: perl file copy question
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| (...) that does help! (meanwhile I got a version working that uses system(), just as a stopgap...) However I really don't want to use system() (or any process spawning things) and since I want to wildcard aren't I going to have to use glob() to get (...) (21 years ago, 5-Oct-05, to lugnet.off-topic.geek)
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Message is in Reply To:
| | perl file copy question
|
| I have a need from within a perl module to copy a large (and variable, it's wildcard driven) number of files from one directory to another. TMTOWTDI of course. What's the best way under the following constraints? - the OS is linux - The wildcard (...) (21 years ago, 5-Oct-05, to lugnet.off-topic.geek)
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