Re: Using wildcards to open files.

[kcott]

in reply to Using wildcards to open files.

G'day starface245,

That's not really enough information to provide a definitive answer.

Do you get that error once or multiple times? Is script.pl in the same directory as the *.msg files or accessible via $PATH? Have you tried anything to track down why the file(s) can't be found? Is the error being emitted by the code you posted or script.pl? Can you show us the code in script.pl?

You could try something like the following (redirecting the output to a temporary file and searching for No such file or directory).

$ perl -e '
use strict;
use warnings;
my @files = glob("*.msg");
for my $file (@files) {
    my $cmd = "ls -l $file";
    system($cmd);
}
'
-rw-r--r--  1 ken  staff  10 26 Oct 03:01 a.msg
-rw-r--r--  1 ken  staff  10 26 Oct 03:01 b.msg
-rw-r--r--  1 ken  staff  10 26 Oct 03:02 c.msg

With a script.pl like this:

$ cat script.pl
while (<>) {
    print "$_\n";
}

This code works fine for me:

$ perl -e '
use strict;
use warnings;
my @files = glob("*.msg");
for my $file (@files) {
    my $cmd = "perl script.pl < $file";
    system($cmd);
}
'
Message A

Message B

Message C

But I also get the same output with a single line:

$ perl script.pl *.msg
Message A

Message B

Message C

Consider whether you really need thousands of shell and Perl processes if a single Perl process would do the same job.

[starface245]

Your code works for me, how do I escape with filenames that has spaces and special characters? such as "A_name sub.msg"

[kennethk]

As aitap said above, quotemeta will do that, a la my $escaped  = quotemeta($file); or even $cmd = "perl script.pl < \Q$file\E";

[starface245]

Both methods doesn't seem to work. It not escaping the space correctly. It doing "A_name\"

[NodeReaper]

This node was taken out by the NodeReaper on Oct 28, 2012 at 07:29 UTC
Reason: [kcott]: Reap: Virtual duplicate of Re^4: Using wildcards to open files. Slightly different wording - same info.

You may view the original node and the consideration vote tally.