run a perl script for all files in a folder

[lakssreedhar]

i have a perl program written for a file in a folder.i want to run this for all files in that folder. the code i have written doesnt seem to work

#!/usr/bin/perl
@files = glob("$ARGV[0]/*");
foreach $f (@files) {
 $cmd="perl addclause.pl < $f ";
system($cmd);
}

[Corion]

The most likely reason is that $ARGV[0] contains whitespace, but you haven't told us so.

If that really is the case, I recommend using File::Glob::bsd_glob which has far saner semantics than glob.

[2teez]

Hi,

Or you could either use opendir function to open up the folder in question and then, get each of the file with readdir function to "work" on like so:

use warnings;
use strict;

opendir my $dh, $ARGV[0] or die "can't open directory: $!";
while ( readdir $dh ) {
    chomp;
    next if $_ eq '.' or $_ eq '..';
    #..... get each file to work on ....
}
closedir $dh or die "can't close directory: $!";

### or use File::Find like so:

use File::Find qw(find);
find( sub { print $_, $/ }, $ARGV[0] );

The Anonymous subroutine, could be used to do what you want on each of the file in the folder.
Please check the following for more info:

• perldoc -f opendir
• perldoc -f readdir
• perldoc File::Find

Hope this helps.

[aaron_baugher]

Wrapping one perl script in another perl script just to loop through files tends to look like overkill to me. Just use the shell:

$ for i in folder/* ; do perl addclause.pl <$i; done

[lakssreedhar]

2 Aaron.I tried the shell but it produces an error like cannot open the file

[lakssreedhar]

Thanks Aaron,your shell script worked

[klightsey]

I am surprised no one listed this option. No need for a script, folks. perl -p -i -e 's/Municipality/City/g' * (The g is if you want all occurrences on the line to be changed, too, not just the first.)