You can try following code (untested)
my $separator = ($^O eq 'MSWin') ? '\' : '/';
sub readFiles {
my $ipath = shift;
my @files;
opendir(sDir, $ipath) ||
die "Unable to open directory '$ipath': $!";
for (readdir(sDir)) {
if (!/^\.{1,2}$/ && -d $iPath . $separator . $_) {
# recursive call for directory
readFiles($iPath . $separator . $_);
} else {
# collect matching files
push @files, $_ if /\.mat$/;
}
}
closedir(sDir);
for (@files){
print FILE $ipath, $separator, $_, "\n";
}
}
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