Difference between revisions of "List Directories Examples in Perl"

Revision as of 20:00, 20 June 2007

List Directories 1

#!/usr/bin/perl
# Derek Winterstien
# Tue May 24 09:16:19 CDT 2005 

$dirname = "/home";

opendir(DIR, $dirname) or die "can't opendir $dirname: $!";
while (defined($file = readdir(DIR))) {
  if ( -d "$dirname/$file" ) {
    
      print "$dirname/$file is a directory\n";
  
  }

}
closedir(DIR);

List Directories 2

#!/usr/bin/perl
# Derek Winterstien
# Tue May 24 09:16:19 CDT 2005

$dirname = "/home";

opendir(DIR,$dirname) or die "Can't open the current directory: $!\n";

@names = readdir(DIR) or die "Unable to read current dir:$!\n";

closedir(DIR);

foreach $file (@names) {
   next if ($file eq ".");   # skip the current directory entry
   next if ($file eq "..");  # skip the parent  directory entry

   if (-d "$dirname/$file"){            # is this a directory?
      print "found a directory: $file\n";
      next;                  # can skip to the next name in the for loop
   }
   if ($file eq "core") {    # is this a file named "core"?
     print "found one!\n";
  }
  print ".\n";
}

List Directories 3

#!/usr/bin/perl
$path=shift || ".";  # Get path from command line, or default to .

opendir (DIR, $path) or die "could not open directory";
@dirs = grep (!/^\.\.?$/ && (-d "$path/$_"), readdir(DIR));
close (DIR);

print "I found these dirs: @dirs\n";