[pve-common.git] / src / PVE / PBSClient.pm

package PVE::PBSClient;
# utility functions for interaction with Proxmox Backup client CLI executable

use strict;
use warnings;

use Fcntl qw(F_GETFD F_SETFD FD_CLOEXEC);
use File::Temp qw(tempdir);
use IO::File;
use JSON;
use POSIX qw(mkfifo strftime ENOENT);

use PVE::JSONSchema qw(get_standard_option);
use PVE::Tools qw(run_command file_set_contents file_get_contents file_read_firstline $IPV6RE);

# returns a repository string suitable for proxmox-backup-client, pbs-restore, etc.
# $scfg must have the following structure:
# {
#     datastore
#     server
#     port        (optional defaults to 8007)
#     username    (optional defaults to 'root@pam')
# }
sub get_repository {
    my ($scfg) = @_;

    my $server = $scfg->{server};
    die "no server given\n" if !defined($server);

    $server = "[$server]" if $server =~ /^$IPV6RE$/;

    if (my $port = $scfg->{port}) {
	$server .= ":$port" if $port != 8007;
    }

    my $datastore = $scfg->{datastore};
    die "no datastore given\n" if !defined($datastore);

    my $username = $scfg->{username} // 'root@pam';

    return "$username\@$server:$datastore";
}

sub new {
    my ($class, $scfg, $storeid, $sdir) = @_;

    die "no section config provided\n" if ref($scfg) eq '';
    die "undefined store id\n" if !defined($storeid);

    my $secret_dir = $sdir // '/etc/pve/priv/storage';

    my $self = bless {
	scfg => $scfg,
	storeid => $storeid,
	secret_dir => $secret_dir
    }, $class;
    return $self;
}

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

    return "$self->{secret_dir}/$self->{storeid}.pw";
}

sub set_password {
    my ($self, $password) = @_;

    my $pwfile = password_file_name($self);
    mkdir $self->{secret_dir};

    PVE::Tools::file_set_contents($pwfile, "$password\n", 0600);
};

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

    my $pwfile = password_file_name($self);

    unlink $pwfile or die "deleting password file failed - $!\n";
};

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

    my $pwfile = password_file_name($self);

    return PVE::Tools::file_read_firstline($pwfile);
}

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

    return "$self->{secret_dir}/$self->{storeid}.enc";
};

sub set_encryption_key {
    my ($self, $key) = @_;

    my $encfile = $self->encryption_key_file_name();
    mkdir $self->{secret_dir};

    PVE::Tools::file_set_contents($encfile, "$key\n", 0600);
};

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

    my $encfile = $self->encryption_key_file_name();

    if (!unlink $encfile) {
	return if $! == ENOENT;
	die "failed to delete encryption key! $!\n";
    }
};

# Returns a file handle if there is an encryption key, or `undef` if there is not. Dies on error.
my sub open_encryption_key {
    my ($self) = @_;

    my $encryption_key_file = $self->encryption_key_file_name();

    my $keyfd;
    if (!open($keyfd, '<', $encryption_key_file)) {
	return undef if $! == ENOENT;
	die "failed to open encryption key: $encryption_key_file: $!\n";
    }

    return $keyfd;
}

my $USE_CRYPT_PARAMS = {
    backup => 1,
    restore => 1,
    'upload-log' => 1,
};

my sub do_raw_client_cmd {
    my ($self, $client_cmd, $param, %opts) = @_;

    my $use_crypto = $USE_CRYPT_PARAMS->{$client_cmd};

    my $client_exe = (delete $opts{binary}) || 'proxmox-backup-client';
    $client_exe = "/usr/bin/$client_exe";
    die "executable not found '$client_exe'! proxmox-backup-client or proxmox-backup-file-restore not installed?\n"
	if ! -x $client_exe;

    my $scfg = $self->{scfg};
    my $repo = get_repository($scfg);

    my $userns_cmd = delete $opts{userns_cmd};

    my $cmd = [];

    push @$cmd, @$userns_cmd if defined($userns_cmd);

    push @$cmd, $client_exe, $client_cmd;

    # This must live in the top scope to not get closed before the `run_command`
    my $keyfd;
    if ($use_crypto) {
	if (defined($keyfd = open_encryption_key($self))) {
	    my $flags = fcntl($keyfd, F_GETFD, 0)
		// die "failed to get file descriptor flags: $!\n";
	    fcntl($keyfd, F_SETFD, $flags & ~FD_CLOEXEC)
		or die "failed to remove FD_CLOEXEC from encryption key file descriptor\n";
	    push @$cmd, '--crypt-mode=encrypt', '--keyfd='.fileno($keyfd);
	} else {
	    push @$cmd, '--crypt-mode=none';
	}
    }

    push @$cmd, @$param if defined($param);

    push @$cmd, "--repository", $repo;

    local $ENV{PBS_PASSWORD} = $self->get_password();

    local $ENV{PBS_FINGERPRINT} = $scfg->{fingerprint};

    # no ascii-art on task logs
    local $ENV{PROXMOX_OUTPUT_NO_BORDER} = 1;
    local $ENV{PROXMOX_OUTPUT_NO_HEADER} = 1;

    if (my $logfunc = $opts{logfunc}) {
	$logfunc->("run: " . join(' ', @$cmd));
    }

    run_command($cmd, %opts);
}

my sub run_raw_client_cmd {
    my ($self, $client_cmd, $param, %opts) = @_;
    return do_raw_client_cmd($self, $client_cmd, $param, %opts);
}

my sub run_client_cmd {
    my ($self, $client_cmd, $param, $no_output, $binary) = @_;

    my $json_str = '';
    my $outfunc = sub { $json_str .= "$_[0]\n" };

    $binary //= 'proxmox-backup-client';

    $param = [] if !defined($param);
    $param = [ $param ] if !ref($param);

    $param = [@$param, '--output-format=json'] if !$no_output;

    do_raw_client_cmd(
	$self,
	$client_cmd,
	$param,
	outfunc => $outfunc,
	errmsg => "$binary failed",
	binary => $binary,
    );

    return undef if $no_output;

    my $res = decode_json($json_str);

    return $res;
}

sub autogen_encryption_key {
    my ($self) = @_;
    my $encfile = $self->encryption_key_file_name();
    run_command(
        ['proxmox-backup-client', 'key', 'create', '--kdf', 'none', $encfile],
        errmsg => 'failed to create encryption key'
    );
    return file_get_contents($encfile);
};

# lists all snapshots, optionally limited to a specific group
sub get_snapshots {
    my ($self, $group) = @_;

    my $param = [];
    push @$param, $group if defined($group);

    return run_client_cmd($self, "snapshots", $param);
};

# create a new PXAR backup of a FS directory tree - doesn't cross FS boundary
# by default.
sub backup_fs_tree {
    my ($self, $root, $id, $pxarname, $cmd_opts) = @_;

    die "backup-id not provided\n" if !defined($id);
    die "backup root dir not provided\n" if !defined($root);
    die "archive name not provided\n" if !defined($pxarname);

    my $param = [
	"$pxarname.pxar:$root",
	'--backup-type', 'host',
	'--backup-id', $id,
    ];

    $cmd_opts //= {};

    return run_raw_client_cmd($self, 'backup', $param, %$cmd_opts);
};

sub restore_pxar {
    my ($self, $snapshot, $pxarname, $target, $cmd_opts) = @_;

    die "snapshot not provided\n" if !defined($snapshot);
    die "archive name not provided\n" if !defined($pxarname);
    die "restore-target not provided\n" if !defined($target);

    my $param = [
	"$snapshot",
	"$pxarname.pxar",
	"$target",
	"--allow-existing-dirs", 0,
    ];
    $cmd_opts //= {};

    return run_raw_client_cmd($self, 'restore', $param, %$cmd_opts);
};

sub forget_snapshot {
    my ($self, $snapshot) = @_;

    die "snapshot not provided\n" if !defined($snapshot);

    return run_raw_client_cmd($self, 'forget', ["$snapshot"]);
};

sub prune_group {
    my ($self, $opts, $prune_opts, $group) = @_;

    die "group not provided\n" if !defined($group);

    # do nothing if no keep options specified for remote
    return [] if scalar(keys %$prune_opts) == 0;

    my $param = [];

    push @$param, "--quiet";

    if (defined($opts->{'dry-run'}) && $opts->{'dry-run'}) {
	push @$param, "--dry-run", $opts->{'dry-run'};
    }

    foreach my $keep_opt (keys %$prune_opts) {
	push @$param, "--$keep_opt", $prune_opts->{$keep_opt};
    }
    push @$param, "$group";

    return run_client_cmd($self, 'prune', $param);
};

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

    my $total = 0;
    my $free = 0;
    my $used = 0;
    my $active = 0;

    eval {
	my $res = run_client_cmd($self, "status");

	$active = 1;
	$total = $res->{total};
	$used = $res->{used};
	$free = $res->{avail};
    };
    if (my $err = $@) {
	warn $err;
    }

    return ($total, $free, $used, $active);
};

sub file_restore_list {
    my ($self, $snapshot, $filepath, $base64) = @_;
    return run_client_cmd(
	$self,
	"list",
	[ $snapshot, $filepath, "--base64", $base64 ? 1 : 0 ],
	0,
	"proxmox-file-restore",
    );
}

# call sync from API, returns a fifo path for streaming data to clients,
# pass it to file_restore_extract to start transfering data
sub file_restore_extract_prepare {
    my ($self) = @_;

    my $tmpdir = tempdir();
    mkfifo("$tmpdir/fifo", 0600)
	or die "creating file download fifo '$tmpdir/fifo' failed: $!\n";

    # allow reading data for proxy user
    my $wwwid = getpwnam('www-data') ||
	die "getpwnam failed";
    chown $wwwid, -1, "$tmpdir"
	or die "changing permission on fifo dir '$tmpdir' failed: $!\n";
    chown $wwwid, -1, "$tmpdir/fifo"
	or die "changing permission on fifo '$tmpdir/fifo' failed: $!\n";

    return "$tmpdir/fifo";
}

# this blocks while data is transfered, call this from a background worker
sub file_restore_extract {
    my ($self, $output_file, $snapshot, $filepath, $base64) = @_;

    my $ret = eval {
	local $SIG{ALRM} = sub { die "got timeout\n" };
	alarm(30);
	sysopen(my $fh, "$output_file", O_WRONLY)
	    or die "open target '$output_file' for writing failed: $!\n";
	alarm(0);

	my $fn = fileno($fh);
	my $errfunc = sub { print $_[0], "\n"; };

	return run_raw_client_cmd(
	    $self,
            "extract",
	    [ $snapshot, $filepath, "-", "--base64", $base64 ? 1 : 0 ],
	    binary => "proxmox-file-restore",
	    errfunc => $errfunc,
	    output => ">&$fn",
	);
    };
    my $err = $@;

    unlink($output_file);
    $output_file =~ s/fifo$//;
    rmdir($output_file) if -d $output_file;

    die "file restore task failed: $err" if $err;
    return $ret;
}

1;
Commit	Line	Data
0904f388	1	package PVE::PBSClient;
243568ca	2	# utility functions for interaction with Proxmox Backup client CLI executable
0904f388 SI	3
	4	use strict;
	5	use warnings;
243568ca	6
0904f388	7	use Fcntl qw(F_GETFD F_SETFD FD_CLOEXEC);
77e402f0	8	use File::Temp qw(tempdir);
0904f388 SI	9	use IO::File;
0904f388 SI	10	use JSON;
77e402f0	11	use POSIX qw(mkfifo strftime ENOENT);
0904f388	12
0904f388	13	use PVE::JSONSchema qw(get_standard_option);
5640c3db DC	14	use PVE::Tools qw(run_command file_set_contents file_get_contents file_read_firstline $IPV6RE);
	15
	16	# returns a repository string suitable for proxmox-backup-client, pbs-restore, etc.
	17	# $scfg must have the following structure:
	18	# {
	19	# datastore
	20	# server
	21	# port (optional defaults to 8007)
	22	# username (optional defaults to 'root@pam')
	23	# }
	24	sub get_repository {
	25	my ($scfg) = @_;
	26
	27	my $server = $scfg->{server};
	28	die "no server given\n" if !defined($server);
	29
	30	$server = "[$server]" if $server =~ /^$IPV6RE$/;
	31
	32	if (my $port = $scfg->{port}) {
	33	$server .= ":$port" if $port != 8007;
	34	}
	35
	36	my $datastore = $scfg->{datastore};
	37	die "no datastore given\n" if !defined($datastore);
	38
	39	my $username = $scfg->{username} // 'root@pam';
	40
	41	return "$username\@$server:$datastore";
	42	}
0904f388 SI	43
	44	sub new {
	45	my ($class, $scfg, $storeid, $sdir) = @_;
	46
	47	die "no section config provided\n" if ref($scfg) eq '';
	48	die "undefined store id\n" if !defined($storeid);
	49
	50	my $secret_dir = $sdir // '/etc/pve/priv/storage';
	51
243568ca TL	52	my $self = bless {
	53	scfg => $scfg,
	54	storeid => $storeid,
	55	secret_dir => $secret_dir
	56	}, $class;
	57	return $self;
0904f388 SI	58	}
	59
	60	my sub password_file_name {
	61	my ($self) = @_;
	62
	63	return "$self->{secret_dir}/$self->{storeid}.pw";
	64	}
	65
	66	sub set_password {
	67	my ($self, $password) = @_;
	68
69a3a585	69	my $pwfile = password_file_name($self);
0904f388 SI	70	mkdir $self->{secret_dir};
	71
	72	PVE::Tools::file_set_contents($pwfile, "$password\n", 0600);
	73	};
	74
	75	sub delete_password {
	76	my ($self) = @_;
	77
69a3a585	78	my $pwfile = password_file_name($self);
0904f388	79
69a3a585	80	unlink $pwfile or die "deleting password file failed - $!\n";
0904f388 SI	81	};
	82
	83	sub get_password {
	84	my ($self) = @_;
	85
69a3a585	86	my $pwfile = password_file_name($self);
0904f388 SI	87
	88	return PVE::Tools::file_read_firstline($pwfile);
	89	}
	90
	91	sub encryption_key_file_name {
	92	my ($self) = @_;
	93
	94	return "$self->{secret_dir}/$self->{storeid}.enc";
	95	};
	96
	97	sub set_encryption_key {
	98	my ($self, $key) = @_;
	99
243568ca	100	my $encfile = $self->encryption_key_file_name();
0904f388 SI	101	mkdir $self->{secret_dir};
	102
	103	PVE::Tools::file_set_contents($encfile, "$key\n", 0600);
	104	};
	105
	106	sub delete_encryption_key {
	107	my ($self) = @_;
	108
243568ca	109	my $encfile = $self->encryption_key_file_name();
0904f388 SI	110
	111	if (!unlink $encfile) {
	112	return if $! == ENOENT;
	113	die "failed to delete encryption key! $!\n";
	114	}
	115	};
	116
	117	# Returns a file handle if there is an encryption key, or `undef` if there is not. Dies on error.
	118	my sub open_encryption_key {
	119	my ($self) = @_;
	120
243568ca	121	my $encryption_key_file = $self->encryption_key_file_name();
0904f388 SI	122
	123	my $keyfd;
	124	if (!open($keyfd, '<', $encryption_key_file)) {
	125	return undef if $! == ENOENT;
	126	die "failed to open encryption key: $encryption_key_file: $!\n";
	127	}
	128
	129	return $keyfd;
	130	}
	131
	132	my $USE_CRYPT_PARAMS = {
	133	backup => 1,
	134	restore => 1,
	135	'upload-log' => 1,
	136	};
	137
	138	my sub do_raw_client_cmd {
	139	my ($self, $client_cmd, $param, %opts) = @_;
	140
	141	my $use_crypto = $USE_CRYPT_PARAMS->{$client_cmd};
	142
b15abdfe SR	143	my $client_exe = (delete $opts{binary}) \|\| 'proxmox-backup-client';
b15abdfe SR	144	$client_exe = "/usr/bin/$client_exe";
9f727e55	145	die "executable not found '$client_exe'! proxmox-backup-client or proxmox-backup-file-restore not installed?\n"
0904f388 SI	146	if ! -x $client_exe;
	147
	148	my $scfg = $self->{scfg};
5640c3db	149	my $repo = get_repository($scfg);
0904f388 SI	150
	151	my $userns_cmd = delete $opts{userns_cmd};
	152
	153	my $cmd = [];
	154
	155	push @$cmd, @$userns_cmd if defined($userns_cmd);
	156
	157	push @$cmd, $client_exe, $client_cmd;
	158
	159	# This must live in the top scope to not get closed before the `run_command`
	160	my $keyfd;
	161	if ($use_crypto) {
69a3a585	162	if (defined($keyfd = open_encryption_key($self))) {
0904f388 SI	163	my $flags = fcntl($keyfd, F_GETFD, 0)
	164	// die "failed to get file descriptor flags: $!\n";
	165	fcntl($keyfd, F_SETFD, $flags & ~FD_CLOEXEC)
	166	or die "failed to remove FD_CLOEXEC from encryption key file descriptor\n";
	167	push @$cmd, '--crypt-mode=encrypt', '--keyfd='.fileno($keyfd);
	168	} else {
	169	push @$cmd, '--crypt-mode=none';
	170	}
	171	}
	172
	173	push @$cmd, @$param if defined($param);
	174
5640c3db	175	push @$cmd, "--repository", $repo;
0904f388	176
243568ca	177	local $ENV{PBS_PASSWORD} = $self->get_password();
0904f388 SI	178
	179	local $ENV{PBS_FINGERPRINT} = $scfg->{fingerprint};
	180
	181	# no ascii-art on task logs
	182	local $ENV{PROXMOX_OUTPUT_NO_BORDER} = 1;
	183	local $ENV{PROXMOX_OUTPUT_NO_HEADER} = 1;
	184
	185	if (my $logfunc = $opts{logfunc}) {
	186	$logfunc->("run: " . join(' ', @$cmd));
	187	}
	188
	189	run_command($cmd, %opts);
	190	}
	191
	192	my sub run_raw_client_cmd {
	193	my ($self, $client_cmd, $param, %opts) = @_;
69a3a585	194	return do_raw_client_cmd($self, $client_cmd, $param, %opts);
0904f388 SI	195	}
	196
	197	my sub run_client_cmd {
b15abdfe	198	my ($self, $client_cmd, $param, $no_output, $binary) = @_;
0904f388 SI	199
	200	my $json_str = '';
	201	my $outfunc = sub { $json_str .= "$_[0]\n" };
	202
b15abdfe SR	203	$binary //= 'proxmox-backup-client';
b15abdfe SR	204
0904f388 SI	205	$param = [] if !defined($param);
	206	$param = [ $param ] if !ref($param);
	207
	208	$param = [@$param, '--output-format=json'] if !$no_output;
	209
69a3a585	210	do_raw_client_cmd(
b15abdfe SR	211	$self,
	212	$client_cmd,
	213	$param,
	214	outfunc => $outfunc,
	215	errmsg => "$binary failed",
	216	binary => $binary,
243568ca	217	);
0904f388 SI	218
	219	return undef if $no_output;
	220
	221	my $res = decode_json($json_str);
	222
	223	return $res;
	224	}
	225
	226	sub autogen_encryption_key {
	227	my ($self) = @_;
243568ca	228	my $encfile = $self->encryption_key_file_name();
0cc6c7e0 TL	229	run_command(
	230	['proxmox-backup-client', 'key', 'create', '--kdf', 'none', $encfile],
	231	errmsg => 'failed to create encryption key'
	232	);
	233	return file_get_contents($encfile);
0904f388 SI	234	};
0904f388 SI	235
2113c7e8	236	# lists all snapshots, optionally limited to a specific group
0904f388	237	sub get_snapshots {
2113c7e8	238	my ($self, $group) = @_;
0904f388 SI	239
0904f388 SI	240	my $param = [];
2113c7e8	241	push @$param, $group if defined($group);
0904f388	242
69a3a585	243	return run_client_cmd($self, "snapshots", $param);
0904f388 SI	244	};
0904f388 SI	245
6674eb1e TL	246	# create a new PXAR backup of a FS directory tree - doesn't cross FS boundary
	247	# by default.
	248	sub backup_fs_tree {
	249	my ($self, $root, $id, $pxarname, $cmd_opts) = @_;
0904f388	250
0904f388	251	die "backup-id not provided\n" if !defined($id);
6674eb1e	252	die "backup root dir not provided\n" if !defined($root);
0904f388	253	die "archive name not provided\n" if !defined($pxarname);
0904f388	254
ad6b3237 TL	255	my $param = [
ad6b3237 TL	256	"$pxarname.pxar:$root",
6674eb1e	257	'--backup-type', 'host',
ad6b3237 TL	258	'--backup-id', $id,
ad6b3237 TL	259	];
0904f388	260
6674eb1e TL	261	$cmd_opts //= {};
	262
	263	return run_raw_client_cmd($self, 'backup', $param, %$cmd_opts);
0904f388 SI	264	};
	265
	266	sub restore_pxar {
8b88b2f6	267	my ($self, $snapshot, $pxarname, $target, $cmd_opts) = @_;
0904f388	268
0904f388	269	die "snapshot not provided\n" if !defined($snapshot);
0904f388	270	die "archive name not provided\n" if !defined($pxarname);
0904f388	271	die "restore-target not provided\n" if !defined($target);
0904f388	272
ad6b3237 TL	273	my $param = [
	274	"$snapshot",
	275	"$pxarname.pxar",
	276	"$target",
	277	"--allow-existing-dirs", 0,
	278	];
8b88b2f6	279	$cmd_opts //= {};
0904f388	280
69a3a585	281	return run_raw_client_cmd($self, 'restore', $param, %$cmd_opts);
0904f388 SI	282	};
	283
	284	sub forget_snapshot {
	285	my ($self, $snapshot) = @_;
	286
	287	die "snapshot not provided\n" if !defined($snapshot);
	288
69a3a585	289	return run_raw_client_cmd($self, 'forget', ["$snapshot"]);
0904f388 SI	290	};
	291
	292	sub prune_group {
	293	my ($self, $opts, $prune_opts, $group) = @_;
	294
	295	die "group not provided\n" if !defined($group);
	296
	297	# do nothing if no keep options specified for remote
	298	return [] if scalar(keys %$prune_opts) == 0;
	299
	300	my $param = [];
	301
	302	push @$param, "--quiet";
	303
	304	if (defined($opts->{'dry-run'}) && $opts->{'dry-run'}) {
	305	push @$param, "--dry-run", $opts->{'dry-run'};
	306	}
	307
	308	foreach my $keep_opt (keys %$prune_opts) {
	309	push @$param, "--$keep_opt", $prune_opts->{$keep_opt};
	310	}
	311	push @$param, "$group";
	312
69a3a585	313	return run_client_cmd($self, 'prune', $param);
0904f388 SI	314	};
	315
	316	sub status {
	317	my ($self) = @_;
	318
	319	my $total = 0;
	320	my $free = 0;
	321	my $used = 0;
	322	my $active = 0;
	323
	324	eval {
69a3a585	325	my $res = run_client_cmd($self, "status");
0904f388 SI	326
	327	$active = 1;
	328	$total = $res->{total};
	329	$used = $res->{used};
	330	$free = $res->{avail};
	331	};
	332	if (my $err = $@) {
	333	warn $err;
	334	}
	335
	336	return ($total, $free, $used, $active);
	337	};
	338
67252649 SR	339	sub file_restore_list {
	340	my ($self, $snapshot, $filepath, $base64) = @_;
	341	return run_client_cmd(
	342	$self,
	343	"list",
	344	[ $snapshot, $filepath, "--base64", $base64 ? 1 : 0 ],
	345	0,
	346	"proxmox-file-restore",
	347	);
	348	}
	349
77e402f0 SR	350	# call sync from API, returns a fifo path for streaming data to clients,
	351	# pass it to file_restore_extract to start transfering data
	352	sub file_restore_extract_prepare {
	353	my ($self) = @_;
	354
	355	my $tmpdir = tempdir();
	356	mkfifo("$tmpdir/fifo", 0600)
	357	or die "creating file download fifo '$tmpdir/fifo' failed: $!\n";
	358
	359	# allow reading data for proxy user
	360	my $wwwid = getpwnam('www-data') \|\|
	361	die "getpwnam failed";
	362	chown $wwwid, -1, "$tmpdir"
	363	or die "changing permission on fifo dir '$tmpdir' failed: $!\n";
	364	chown $wwwid, -1, "$tmpdir/fifo"
	365	or die "changing permission on fifo '$tmpdir/fifo' failed: $!\n";
	366
	367	return "$tmpdir/fifo";
	368	}
	369
	370	# this blocks while data is transfered, call this from a background worker
	371	sub file_restore_extract {
	372	my ($self, $output_file, $snapshot, $filepath, $base64) = @_;
	373
	374	my $ret = eval {
	375	local $SIG{ALRM} = sub { die "got timeout\n" };
	376	alarm(30);
	377	sysopen(my $fh, "$output_file", O_WRONLY)
	378	or die "open target '$output_file' for writing failed: $!\n";
	379	alarm(0);
	380
	381	my $fn = fileno($fh);
	382	my $errfunc = sub { print $_[0], "\n"; };
	383
	384	return run_raw_client_cmd(
	385	$self,
	386	"extract",
	387	[ $snapshot, $filepath, "-", "--base64", $base64 ? 1 : 0 ],
	388	binary => "proxmox-file-restore",
	389	errfunc => $errfunc,
	390	output => ">&$fn",
	391	);
	392	};
	393	my $err = $@;
	394
	395	unlink($output_file);
	396	$output_file =~ s/fifo$//;
	397	rmdir($output_file) if -d $output_file;
	398
	399	die "file restore task failed: $err" if $err;
	400	return $ret;
	401	}
	402
0904f388	403	1;