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#! /usr/bin/perl use strict; use warnings; use File::Find; File::Find->find(&main::wanted, '/'); sub wanted { if (-T $File::Find::name) { open ("FILE", "< $File::Find::name") or die ("$!: Could not open " . $File::Find::name); my $first_line = <FILE>"; unless ($first_line =~ m(^\#\!\s{0,1}/usr/bin/perl\n$) { return 0; } $first_line =~ s[perl][perl5]i; while (<FILE>) { $first_line .= $_; } close ("FILE") or die ("Could not close file " . $File::Find::name . " because $!"); # create a temp file so if we get interrupted # we won't lose our data `cp $File::Find::name $File::Find::name~`; open ("FILE", "> $File::Find::name") or die("Can't open $File::Find::name for " . "writing because $!"); print FILE $first_line; close ("FILE") or die ("Cannot close $File::Find::name " . "because $!"); # get rid of the temp file unlink ("$File::Find::name~"); } }

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In reply to Re: Re: Re: Re: Re: Ensuring forward compatibility by Vautrin
in thread Ensuring forward compatibility by DrHyde

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