to duplicate this functionality without running a separate process.
#! /usr/bin/perl -w
eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
if 0; #$running_under_some_shell
use strict;
use File::Find ();
# Set the variable $File::Find::dont_use_nlink if you're using AFS,
# since AFS cheats.
# for the convenience of &wanted calls, including -eval statements:
use vars qw/*name *dir *prune/;
*name = *File::Find::name;
*dir = *File::Find::dir;
*prune = *File::Find::prune;
sub wanted;
sub ls ();
my @rwx = qw(--- --x -w- -wx r-- r-x rw- rwx);
my @moname = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec);
my (%uid, %user);
while (my ($name, $pw, $uid) = getpwent) {
$user{$uid} = $name unless exists $user{$uid};
}
my (%gid, %group);
while (my ($name, $pw, $gid) = getgrent) {
$group{$gid} = $name unless exists $group{$gid};
}
# Traverse desired filesystems
File::Find::find({wanted => \&wanted}, '.');
exit;
sub wanted {
my ($dev,$ino,$mode,$nlink,$uid,$gid);
(($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
-f _ &&
(
(($mode & 020) == 020)
||
(($mode & 04) == 04)
||
(($mode & 02) == 02)
||
(($mode & 01) == 01)
||
(($mode & 01000) == 01000)
) &&
ls;
}
sub sizemm {
my $rdev = shift;
sprintf("=, =", ($rdev >> 8) & 0xff, $rdev & 0xff);
}
sub ls () {
my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
$atime,$mtime,$ctime,$blksize,$blocks) = lstat(_);
my $pname = $name;
$blocks
or $blocks = int(($size + 1023) / 1024);
my $perms = $rwx[$mode & 7];
$mode >>= 3;
$perms = $rwx[$mode & 7] . $perms;
$mode >>= 3;
$perms = $rwx[$mode & 7] . $perms;
substr($perms, 2, 1) =~ tr/-x/Ss/ if -u _;
substr($perms, 5, 1) =~ tr/-x/Ss/ if -g _;
substr($perms, 8, 1) =~ tr/-x/Tt/ if -k _;
if (-f _) { $perms = '-' . $perms; }
elsif (-d _) { $perms = 'd' . $perms; }
elsif (-l _) { $perms = 'l' . $perms; $pname .= ' -> ' . readlink(
+$_); }
elsif (-c _) { $perms = 'c' . $perms; $size = sizemm($rdev); }
elsif (-b _) { $perms = 'b' . $perms; $size = sizemm($rdev); }
elsif (-p _) { $perms = 'p' . $perms; }
elsif (-S _) { $perms = 's' . $perms; }
else { $perms = '?' . $perms; }
my $user = $user{$uid} || $uid;
my $group = $group{$gid} || $gid;
my ($sec,$min,$hour,$mday,$mon,$timeyear) = localtime($mtime);
if (-M _ > 365.25 / 2) {
$timeyear += 1900;
} else {
$timeyear = sprintf("d:d", $hour, $min);
}
printf "%5lu %4ld %-10s = %-8s %-8s %8s %s - %5s %s\n",
$ino,
$blocks,
$perms,
$nlink,
$user,
$group,
$size,
$moname[$mon],
$mday,
$timeyear,
$pname;
1;
}