Rather than relying on the shell, if you have BSD::Resouce installed, you could: 

#!/usr/bin/perl

use strict;
use warnings;

use BSD::Resource;

my $max = getrlimit( RLIMIT_NOFILE );
print "$max\n";

[download]
or if you're feeling really adventurous, with Inline::C 
#!/usr/bin/perl

use Inline C;
use strict;

my $max = get_max_files();
print $max, "\n";

__END__
__C__
#include <sys/resource.h>

int get_max_files() {

  struct rlimit rl;
  if (getrlimit( RLIMIT_NOFILE, &rl) == 0) {
    return rl.rlim_cur;
  } else {
    return -1;
  }
}

[download]
(that needs more error checking).

-derby

In reply to Re: ulimit output? by derby
in thread ulimit output? by davee123

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