One thing that everybody here is forgetting is that unless you are doing a readdir on the current directory, you must prepend the directory name for -M, -C, stat, etc.
Here are some ways to do it:
#!perl -w
use strict;
use File::stat;
# Method 1:
my $input_directory_lowest = "pridir";
opendir (LOWEST, $input_directory_lowest)
or die "Error opening directory: $!";
my @files;
while (my $fname = readdir LOWEST) {
if ($fname =~ /^Flat_file.*\.txt$/) {
push @files,
[stat("$input_directory_lowest/$fname")->ctime, $fname];
}
}
closedir(LOWEST);
my @low1 =
map { $_->[1] }
sort {$a->[0] <=> $b->[0]} @files;
print join("\n ", "low1=", @low1), "\n";
# Method 2: same as 1, but without explicit loop
opendir (LOWEST, $input_directory_lowest)
or die "Error opening directory: $!";
my @low2 =
map { $_->[1] }
sort {$a->[0] <=> $b->[0]}
map { [ stat("$input_directory_lowest/$_")->ctime, $_ ] }
grep /^Flat_file.*txt$/,
readdir(LOWEST);
closedir(LOWEST);
print join("\n ", "low2=", @low2), "\n";
# Method 3: outputs file names with directory; uses 'glob'
my @low3 =
map { $_->[1] }
sort {$a->[0] <=> $b->[0]}
map { [ stat($_)->ctime, $_ ] }
glob("$input_directory_lowest/Flat_file*.txt");
print join("\n ", "low3=", @low3), "\n";