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minor update

#!/usr/bin/perl
#
# lcuserdel
#
# Scott Harrison
# October 27, 2000

use strict;

# This script is a setuid script (chmod 6755) that should
# be run by user 'www'.  It DOES NOT delete directories.
# All it does is remove a user's entries from
# /etc/passwd, /etc/groups, and /etc/smbpasswd.



# Standard input usage
# First line is USERNAME

# Command-line arguments [USERNAME]
# Yes, but be very careful here (don't pass shell commands)
# and this is only supported to allow perl-system calls.

# Usage within code
#
# $exitcode=system("NAME")/256;
# print "uh-oh" if $exitcode;

# These are the exit codes.

# Security
$ENV{'PATH'}=""; # Nullify path information.
$ENV{'BASH_ENV'}=""; # Nullify shell environment information.

# Do not print error messages if there are command-line arguments
my $noprint=0;
if (@ARGV) {
    $noprint=1;
}

open (IN, "</etc/passwd");
my @lines=<IN>;
close IN;
my $wwwid;
for my $l (@lines) {
    chop $l;
    my @F=split(/\:/,$l);
    if ($F[0] eq 'www') {$wwwid=$F[2];}
}
if ($wwwid!=$<) {
    print("User ID mismatch.  This program must be run as user 'www'\n") unless $noprint;
    exit 1;
}
&disable_root_capability;

# Gather input.  Should only be 3 values.
my @input;
if (@ARGV==3) {
    @input=@ARGV;
}
elsif (@ARGV) {
    print("Error. This program needs 3 command-line arguments (username, old password, new password).\n") unless $noprint;
    exit 2;
}
else {
    @input=<>;
    if (@input!=3) {
	print("Error. Three lines need to be entered into standard input.\n") unless $noprint;
	exit 3;
    }
    map {chop} @input;
}
# Handle case of another lcpasswd process
unless (&try_to_lock("/tmp/lock_lcpasswd")) {
    print "Error. Too many other simultaneous password change requests being made.\n" unless $noprint;
    exit 4;
}