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Edit File: delpop

#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/delpop                          Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

package scripts::delpop;

use strict;
use warnings;

use Cpanel::AcctUtils::DomainOwner::Tiny ();
use Cpanel::PwCache                      ();
use Cpanel::SafetyBits                   ();
use Cpanel::SafeFile                     ();
use Cpanel::Email::Validate              ();
use Cpanel::Usage                        ();
use Cpanel::Sys::Setsid::Fast            ();
use Cpanel::Hooks                        ();

my @attributes = qw{ email user owner domain file };

# call binary
run(@ARGV) unless caller();

sub run {
    my (@args) = @_;

my $debug;
    my $verbose;
    my $email;

my $opts = {
        email   => \$email,
        debug   => \$debug,
        verbose => \$verbose,
    };

# compatibility with previous binary version
    if ( scalar @args == 1 && $args[0] !~ /^\-/ ) {
        $email = $args[0];
    }
    else {
        Cpanel::Usage::wrap_options( \@args, \&usage, $opts );
    }

my $pop = scripts::delpop->new( email => $email || undef );

# interactive fields
    my $interactive_fields = {
        email => 'Please enter the pop account to be removed (e.g. bob@sally.com)? ',
    };
    foreach my $field ( sort keys %$interactive_fields ) {
        while ( !$pop->$field() ) {
            print $interactive_fields->{$field};
            my $input;
            chomp( $input = <STDIN> );
            $pop->$field($input) if length($input);
        }
    }

Cpanel::Hooks::hook(
        {
            'category' => 'scripts',
            'event'    => 'delpop',
            'stage'    => 'pre',
        },
        { 'email' => $email },
    );

$pop->delete();

Cpanel::Hooks::hook(
        {
            'category' => 'scripts',
            'event'    => 'delpop',
            'stage'    => 'post',
        },
        { 'email' => $email },
    );

exit;
}

sub usage {
    my $prog = $0;
    print <<USAGE;
$0 [--email=]<user\@domain.com>

Delete the specified email account.

--help  : display this documentation
    --email : a valid address email ( format: user\@domain.com )
USAGE
    exit 1;
}

sub new {
    my ( $package, %opts ) = @_;
    my $self = bless {}, __PACKAGE__;

# create accessor and hooks
    $self->_set_attributes();

# set values
    map { $self->$_( $opts{$_} ) } keys %opts;

return $self;
}

sub _set_attributes {

# call once at first init
    return unless @attributes;
    foreach my $att (@attributes) {
        my $accessor = __PACKAGE__ . "::$att";

# allow symbolic refs to typeglob
        no strict 'refs';
        *$accessor = sub {
            my ( $self, $v ) = @_;
            if ( defined $v ) {
                foreach (qw{before validate set after}) {
                    if ( $_ eq 'set' ) {
                        $self->{$att} = $v;
                        next;
                    }
                    my $sub = '_' . $_ . '_' . $att;
                    if ( defined &{ __PACKAGE__ . '::' . $sub } ) {
                        return unless $self->$sub($v);
                    }
                }
            }
            return $self->{$att};
        };
    }
    @attributes = undef;
    return 1;
}

sub _validate_email {
    my ( $self, $email ) = @_;

Cpanel::Email::Validate::valid_email($email)
      or die "'$email' is an invalid email";
    return 1;
}

sub _after_email {
    my ($self) = @_;

# mix validation and before_save :)
    my ( $user, $domain ) = split( /\@/, $self->email );
    $self->user($user);
    $self->domain($domain);
    return 1;
}

# we need to have access to the domain, when setting an owner
sub _after_domain {
    my ($self) = @_;

my $owner = Cpanel::AcctUtils::DomainOwner::Tiny::getdomainowner( $self->domain(), { 'default' => '' } );
    die "Cannot find the owner of " . $self->domain() . ", try rebuilding /etc/userdomains first with /usr/local/cpanel/scripts/updateuserdomains"
      unless $owner;
    $self->owner($owner);
    return 1;
}

sub _before_owner {
    my ( $self, $owner ) = @_;

# setuids
    my ( $uid, $gid ) = ( getpwnam($owner) )[ 2, 3 ];
    die "cannot find user ", $owner unless defined $uid && defined $gid;

Cpanel::Sys::Setsid::Fast::fast_setsid();
    Cpanel::SafetyBits::setuids( $uid, $gid );

# This is very similar to the code in Cpanel::Email::_pop_exists
    # but it would be a chore to make that module available just for
    # this script.
    my $ownerhomedir = ( Cpanel::PwCache::getpwnam($owner) )[7];
    die "cannot find home dir for user $owner" unless defined $ownerhomedir;
    my $file = join '/', $ownerhomedir, 'etc', $self->domain(), 'passwd';
    $file =~ s/\.\.//g;

$self->file($file);
    return 1;
}

sub _before_file {
    my ( $self, $file ) = @_;

die "Unable to determine domain owner's passwd file.\n" unless -e $file;
    return 1;
}

sub _after_file {
    my ($self) = @_;

# Untaint the value
    if ( $self->file() =~ m/^(.*)$/ ) {

# direct access to untaint ( to avoid infinite loop )
        $self->{file} = $1;
    }
    return 1;
}

sub _check_if_account_exists {
    my ($self) = @_;

my $sflock = Cpanel::SafeFile::safeopen( \*PASSWD, '<', $self->file() );
    die "Unable to read from domain owner's passwd file.\n" unless $sflock;
    my $found;
    my $user        = $self->user();
    my $match_regex = qr/^\Q$user\E:/;
    while ( my $line = <PASSWD> ) {
        chomp $line;
        if ( $line =~ $match_regex ) {
            $found = 1;
            last;
        }
    }
    Cpanel::SafeFile::safeclose( \*PASSWD, $sflock );
    die "Account does not exist.\n" unless $found;
    return 1;
}

sub delete {
    my ($self) = @_;

$self->_check_if_account_exists();

# perform the deletion
    $ENV{'REMOTE_USER'} = $self->owner();
    system '/usr/local/cpanel/cpanel-email', 'delpop', $self->email();
    die "\nEmail account deletion failed ($?)\n" if ( $? != 0 );
    print "Deleted " . $self->email() . " for user " . $self->owner() . "\n";
    return 1;
}