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#!/usr/bin/perl
use strict;
use warnings;
use Email::Valid::Loose qw( );
my ( $email, $username, $password );
# Configure the strictness of our email checks.
my $checker = Email::Valid::Loose->new
( "-fqdn" => 1
, "-fudge" => 0
, "-local_rules" => 0
, "-mxcheck" => 1
, "-tldcheck" => 0
);
# Check to see if we're in batch mode.
if ( scalar @ARGV == 3 and $ARGV[0] eq "--batch" ) {
( undef, $email, $username ) = @ARGV;
$email = $checker->address( $email );
chomp( $password = <STDIN> );
# Some other incorrect argument arrangement.
} elsif ( scalar @ARGV ) {
print "You can't pass any arguments to this script!\n";
exit 2;
} else {
# If they didn't provide a terminal definition, then assume xterm.
# Everybody emulates xterm to at least a basic extent.
if ( not exists $ENV{"TERM"} ) {
$ENV{"TERM"} = "xterm";
print "I don't know what terminal you're using; guessing xterm...\n";
};
# Disable buffering.
$|++;
my ( $password2 );
while ( 1 ) {
print "Email address to associate with new user: ";
chomp ( $email = <STDIN> );
if ( $email eq "" ) {
print "You must provide an email address!\n";
next;
};
$email = $checker->address( $email );
if ( not defined $email ) {
print "Please, at least pretend to provide a valid email address.\n";
next;
};
last;
};
while ( 1 ) {
print "Desired username: ";
chomp ( $username = <STDIN> );
if ( $username eq "" ) {
print "You have to enter a username!\n";
next;
};
if ( $username =~ /^(git|iki)-/ ) {
print "Your username cannot start with git- or iki-!\n";
next;
};
if ( $username !~ /^[a-zA-Z0-9_.][a-zA-Z0-9_.-]+$/ ) {
print "Usernames must consist only of letters, digits, underscores, periods, and dashes, and not start with a dash. Usernames are case sensitive.\n";
next
};
last;
};
while ( 1 ) {
system( "stty", "-echo" );
print "Desired password: ";
chomp ( $password = <STDIN> );
print "\nRetype password: ";
chomp ( $password2 = <STDIN> );
print "\n";
system( "stty", "echo" );
if ( $password ne $password2 ) {
print "Provided passwords do not match; try again.\n";
next;
};
if ( $password eq "" ) {
print "You have to enter a password!\n";
next;
};
last;
};
};
# All the correctness checks should be repeated here. There are multiple
# pathways to get to this point, but only a single path from here on down.
if ( not defined $email or $email eq "" ) { print "Email address is undefined!\n"; exit 3; };
if ( not defined $username or $username eq "" ) { print "Username is undefined!\n"; exit 3; };
if ( $username =~ /^(git|iki)-/ ) { print "Username must not begin with git- or iki-!\n"; exit 3; };
if ( $username !~ /^[a-zA-Z0-9_.][a-zA-Z0-9_.-]+$/ ) { print "Usernames must consist only of letters, digits, underscores, periods, and dashes, and not start with a dash. Usernames are case sensitive.\n" };
if ( not defined $password or $password eq "" ) { print "Password is undefined!\n"; exit 3; };
# Here on down is the actual creation code.
my @saltchars =
( 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
, 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
, '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'
, '.', '/'
);
my $salt = "\$6\$";
foreach my $n ( 1 .. 16 ) {
$salt .= $saltchars[int ( rand ( scalar @saltchars ) )];
};
$salt .= "\$";
my $crypt = crypt( $password, $salt );
my $ret = system( "/usr/sbin/useradd", "-c", "$email", "-k", "/var/empty", "-g", "users", "-m", "-p", $crypt, "-s", "/usr/bin/pinyshell", $username );
if ( $ret ) {
print "An error occured creating the user; most likely, that username is already taken.\n";
exit 1;
};
print "Your user has been created. Try logging in!\n";
exit 0;
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