src/PVE/Tools.pm

   1 package PVE::Tools;
   2
   3 use strict;
   4 use warnings;
   5 use POSIX qw(EINTR);
   6 use IO::Socket::IP;
   7 use Socket qw(AF_INET AF_INET6 AI_ALL AI_V4MAPPED);
   8 use IO::Select;
   9 use File::Basename;
  10 use File::Path qw(make_path);
  11 use Filesys::Df (); # don't overwrite our df()
  12 use IO::Pipe;
  13 use IO::File;
  14 use IO::Dir;
  15 use IPC::Open3;
  16 use Fcntl qw(:DEFAULT :flock);
  17 use base 'Exporter';
  18 use URI::Escape;
  19 use Encode;
  20 use Digest::SHA;
  21 use Text::ParseWords;
  22 use String::ShellQuote;
  23 use Time::HiRes qw(usleep gettimeofday tv_interval alarm);
  24
  25 # avoid warning when parsing long hex values with hex()
  26 no warnings 'portable'; # Support for 64-bit ints required
  27
  28 our @EXPORT_OK = qw(
  29 $IPV6RE
  30 $IPV4RE
  31 lock_file
  32 lock_file_full
  33 run_command
  34 file_set_contents
  35 file_get_contents
  36 file_read_firstline
  37 dir_glob_regex
  38 dir_glob_foreach
  39 split_list
  40 template_replace
  41 safe_print
  42 trim
  43 extract_param
  44 file_copy
  45 );
  46
  47 my $pvelogdir = "/var/log/pve";
  48 my $pvetaskdir = "$pvelogdir/tasks";
  49
  50 mkdir $pvelogdir;
  51 mkdir $pvetaskdir;
  52
  53 my $IPV4OCTET = "(?:25[0-5]|(?:2[0-4]|1[0-9]|[1-9])?[0-9])";
  54 our $IPV4RE = "(?:(?:$IPV4OCTET\\.){3}$IPV4OCTET)";
  55 my $IPV6H16 = "(?:[0-9a-fA-F]{1,4})";
  56 my $IPV6LS32 = "(?:(?:$IPV4RE|$IPV6H16:$IPV6H16))";
  57
  58 our $IPV6RE = "(?:" .
  59     "(?:(?:" .                             "(?:$IPV6H16:){6})$IPV6LS32)|" .
  60     "(?:(?:" .                           "::(?:$IPV6H16:){5})$IPV6LS32)|" .
  61     "(?:(?:(?:" .              "$IPV6H16)?::(?:$IPV6H16:){4})$IPV6LS32)|" .
  62     "(?:(?:(?:(?:$IPV6H16:){0,1}$IPV6H16)?::(?:$IPV6H16:){3})$IPV6LS32)|" .
  63     "(?:(?:(?:(?:$IPV6H16:){0,2}$IPV6H16)?::(?:$IPV6H16:){2})$IPV6LS32)|" .
  64     "(?:(?:(?:(?:$IPV6H16:){0,3}$IPV6H16)?::(?:$IPV6H16:){1})$IPV6LS32)|" .
  65     "(?:(?:(?:(?:$IPV6H16:){0,4}$IPV6H16)?::" .           ")$IPV6LS32)|" .
  66     "(?:(?:(?:(?:$IPV6H16:){0,5}$IPV6H16)?::" .            ")$IPV6H16)|" .
  67     "(?:(?:(?:(?:$IPV6H16:){0,6}$IPV6H16)?::" .                    ")))";
  68
  69 our $IPRE = "(?:$IPV4RE|$IPV6RE)";
  70
  71 use constant {CLONE_NEWNS   => 0x00020000,
  72               CLONE_NEWUTS  => 0x04000000,
  73               CLONE_NEWIPC  => 0x08000000,
  74               CLONE_NEWUSER => 0x10000000,
  75               CLONE_NEWPID  => 0x20000000,
  76               CLONE_NEWNET  => 0x40000000};
  77
  78 sub run_with_timeout {
  79     my ($timeout, $code, @param) = @_;
  80
  81     die "got timeout\n" if $timeout <= 0;
  82
  83     my $prev_alarm = alarm 0; # suspend outer alarm early
  84
  85     my $sigcount = 0;
  86
  87     my $res;
  88
  89     eval {
  90         local $SIG{ALRM} = sub { $sigcount++; die "got timeout\n"; };
  91         local $SIG{PIPE} = sub { $sigcount++; die "broken pipe\n" };
  92         local $SIG{__DIE__};   # see SA bug 4631
  93
  94         alarm($timeout);
  95
  96         eval { $res = &$code(@param); };
  97
  98         alarm(0); # avoid race conditions
  99
 100         die $@ if $@;
 101     };
 102
 103     my $err = $@;
 104
 105     alarm $prev_alarm;
 106
 107     # this shouldn't happen anymore?
 108     die "unknown error" if $sigcount && !$err; # seems to happen sometimes
 109
 110     die $err if $err;
 111
 112     return $res;
 113 }
 114
 115 # flock: we use one file handle per process, so lock file
 116 # can be called multiple times and succeeds for the same process.
 117
 118 my $lock_handles =  {};
 119
 120 sub lock_file_full {
 121     my ($filename, $timeout, $shared, $code, @param) = @_;
 122
 123     $timeout = 10 if !$timeout;
 124
 125     my $mode = $shared ? LOCK_SH : LOCK_EX;
 126
 127     my $lock_func = sub {
 128         if (!$lock_handles->{$$}->{$filename}) {
 129             $lock_handles->{$$}->{$filename} = new IO::File (">>$filename") ||
 130                 die "can't open file - $!\n";
 131         }
 132
 133         if (!flock ($lock_handles->{$$}->{$filename}, $mode|LOCK_NB)) {
 134             print STDERR "trying to aquire lock...";
 135             my $success;
 136             while(1) {
 137                 $success = flock($lock_handles->{$$}->{$filename}, $mode);
 138                 # try again on EINTR (see bug #273)
 139                 if ($success || ($! != EINTR)) {
 140                     last;
 141                 }
 142             }
 143             if (!$success) {
 144                 print STDERR " failed\n";
 145                 die "can't aquire lock - $!\n";
 146             }
 147             print STDERR " OK\n";
 148         }
 149     };
 150
 151     my $res;
 152
 153     eval { run_with_timeout($timeout, $lock_func); };
 154     my $err = $@;
 155     if ($err) {
 156         $err = "can't lock file '$filename' - $err";
 157     } else {
 158         eval { $res = &$code(@param) };
 159         $err = $@;
 160     }
 161
 162     if (my $fh = $lock_handles->{$$}->{$filename}) {
 163         $lock_handles->{$$}->{$filename} = undef;
 164         close ($fh);
 165     }
 166
 167     if ($err) {
 168         $@ = $err;
 169         return undef;
 170     }
 171
 172     $@ = undef;
 173
 174     return $res;
 175 }
 176
 177
 178 sub lock_file {
 179     my ($filename, $timeout, $code, @param) = @_;
 180
 181     return lock_file_full($filename, $timeout, 0, $code, @param);
 182 }
 183
 184 sub file_set_contents {
 185     my ($filename, $data, $perm)  = @_;
 186
 187     $perm = 0644 if !defined($perm);
 188
 189     my $tmpname = "$filename.tmp.$$";
 190
 191     eval {
 192         my $fh = IO::File->new($tmpname, O_WRONLY|O_CREAT, $perm);
 193         die "unable to open file '$tmpname' - $!\n" if !$fh;
 194         die "unable to write '$tmpname' - $!\n" unless print $fh $data;
 195         die "closing file '$tmpname' failed - $!\n" unless close $fh;
 196     };
 197     my $err = $@;
 198
 199     if ($err) {
 200         unlink $tmpname;
 201         die $err;
 202     }
 203
 204     if (!rename($tmpname, $filename)) {
 205         my $msg = "close (rename) atomic file '$filename' failed: $!\n";
 206         unlink $tmpname;
 207         die $msg;
 208     }
 209 }
 210
 211 sub file_get_contents {
 212     my ($filename, $max) = @_;
 213
 214     my $fh = IO::File->new($filename, "r") ||
 215         die "can't open '$filename' - $!\n";
 216
 217     my $content = safe_read_from($fh, $max);
 218
 219     close $fh;
 220
 221     return $content;
 222 }
 223
 224 sub file_copy {
 225     my ($filename, $dst, $max, $perm) = @_;
 226
 227     file_set_contents ($dst, file_get_contents($filename, $max), $perm);
 228 }
 229
 230 sub file_read_firstline {
 231     my ($filename) = @_;
 232
 233     my $fh = IO::File->new ($filename, "r");
 234     return undef if !$fh;
 235     my $res = <$fh>;
 236     chomp $res if $res;
 237     $fh->close;
 238     return $res;
 239 }
 240
 241 sub safe_read_from {
 242     my ($fh, $max, $oneline) = @_;
 243
 244     $max = 32768 if !$max;
 245
 246     my $br = 0;
 247     my $input = '';
 248     my $count;
 249     while ($count = sysread($fh, $input, 8192, $br)) {
 250         $br += $count;
 251         die "input too long - aborting\n" if $br > $max;
 252         if ($oneline && $input =~ m/^(.*)\n/) {
 253             $input = $1;
 254             last;
 255         }
 256     }
 257     die "unable to read input - $!\n" if !defined($count);
 258
 259     return $input;
 260 }
 261
 262 # The $cmd parameter can be:
 263 #  -) a string
 264 #    This is generally executed by passing it to the shell with the -c option.
 265 #    However, it can be executed in one of two ways, depending on whether
 266 #    there's a pipe involved:
 267 #      *) with pipe: passed explicitly to bash -c, prefixed with:
 268 #          set -o pipefail &&
 269 #      *) without a pipe: passed to perl's open3 which uses 'sh -c'
 270 #      (Note that this may result in two different syntax requirements!)
 271 #      FIXME?
 272 #  -) an array of arguments (strings)
 273 #    Will be executed without interference from a shell. (Parameters are passed
 274 #    as is, no escape sequences of strings will be touched.)
 275 #  -) an array of arrays
 276 #    Each array represents a command, and each command's output is piped into
 277 #    the following command's standard input.
 278 #    For this a shell command string is created with pipe symbols between each
 279 #    command.
 280 #    Each command is a list of strings meant to end up in the final command
 281 #    unchanged. In order to achieve this, every argument is shell-quoted.
 282 #    Quoting can be disabled for a particular argument by turning it into a
 283 #    reference, this allows inserting arbitrary shell options.
 284 #    For instance: the $cmd [ [ 'echo', 'hello', \'>/dev/null' ] ] will not
 285 #    produce any output, while the $cmd [ [ 'echo', 'hello', '>/dev/null' ] ]
 286 #    will literally print: hello >/dev/null
 287 sub run_command {
 288     my ($cmd, %param) = @_;
 289
 290     my $old_umask;
 291     my $cmdstr;
 292
 293     if (my $ref = ref($cmd)) {
 294         if (ref($cmd->[0])) {
 295             $cmdstr = 'set -o pipefail && ';
 296             my $pipe = '';
 297             foreach my $command (@$cmd) {
 298                 # concatenate quoted parameters
 299                 # strings which are passed by reference are NOT shell quoted
 300                 $cmdstr .= $pipe .  join(' ', map { ref($_) ? $$_ : shellquote($_) } @$command);
 301                 $pipe = ' | ';
 302             }
 303             $cmd = [ '/bin/bash', '-c', "set -o pipefail && $cmdstr" ];
 304         } else {
 305             $cmdstr = cmd2string($cmd);
 306         }
 307     } else {
 308         $cmdstr = $cmd;
 309         if ($cmd =~ m/\|/) {
 310             # see 'man bash' for option pipefail
 311             $cmd = [ '/bin/bash', '-c', "set -o pipefail && $cmd" ];
 312         } else {
 313             $cmd = [ $cmd ];
 314         }
 315     }
 316
 317     my $errmsg;
 318     my $laststderr;
 319     my $timeout;
 320     my $oldtimeout;
 321     my $pid;
 322     my $exitcode;
 323
 324     my $outfunc;
 325     my $errfunc;
 326     my $logfunc;
 327     my $input;
 328     my $output;
 329     my $afterfork;
 330     my $noerr;
 331
 332     eval {
 333
 334         foreach my $p (keys %param) {
 335             if ($p eq 'timeout') {
 336                 $timeout = $param{$p};
 337             } elsif ($p eq 'umask') {
 338                 $old_umask = umask($param{$p});
 339             } elsif ($p eq 'errmsg') {
 340                 $errmsg = $param{$p};
 341             } elsif ($p eq 'input') {
 342                 $input = $param{$p};
 343             } elsif ($p eq 'output') {
 344                 $output = $param{$p};
 345             } elsif ($p eq 'outfunc') {
 346                 $outfunc = $param{$p};
 347             } elsif ($p eq 'errfunc') {
 348                 $errfunc = $param{$p};
 349             } elsif ($p eq 'logfunc') {
 350                 $logfunc = $param{$p};
 351             } elsif ($p eq 'afterfork') {
 352                 $afterfork = $param{$p};
 353             } elsif ($p eq 'noerr') {
 354                 $noerr = $param{$p};
 355             } else {
 356                 die "got unknown parameter '$p' for run_command\n";
 357             }
 358         }
 359
 360         if ($errmsg) {
 361             my $origerrfunc = $errfunc;
 362             $errfunc = sub {
 363                 if ($laststderr) {
 364                     if ($origerrfunc) {
 365                         &$origerrfunc("$laststderr\n");
 366                     } else {
 367                         print STDERR "$laststderr\n" if $laststderr;
 368                     }
 369                 }
 370                 $laststderr = shift;
 371             };
 372         }
 373
 374         my $reader = $output && $output =~ m/^>&/ ? $output : IO::File->new();
 375         my $writer = $input && $input =~ m/^<&/ ? $input : IO::File->new();
 376         my $error  = IO::File->new();
 377
 378         # try to avoid locale related issues/warnings
 379         my $lang = $param{lang} || 'C';
 380
 381         my $orig_pid = $$;
 382
 383         eval {
 384             local $ENV{LC_ALL} = $lang;
 385
 386             # suppress LVM warnings like: "File descriptor 3 left open";
 387             local $ENV{LVM_SUPPRESS_FD_WARNINGS} = "1";
 388
 389             $pid = open3($writer, $reader, $error, @$cmd) || die $!;
 390
 391             # if we pipe fron STDIN, open3 closes STDIN, so we we
 392             # a perl warning "Filehandle STDIN reopened as GENXYZ .. "
 393             # as soon as we open a new file.
 394             # to avoid that we open /dev/null
 395             if (!ref($writer) && !defined(fileno(STDIN))) {
 396                 POSIX::close(0);
 397                 open(STDIN, "</dev/null");
 398             }
 399         };
 400
 401         my $err = $@;
 402
 403         # catch exec errors
 404         if ($orig_pid != $$) {
 405             warn "ERROR: $err";
 406             POSIX::_exit (1);
 407             kill ('KILL', $$);
 408         }
 409
 410         die $err if $err;
 411
 412         local $SIG{ALRM} = sub { die "got timeout\n"; } if $timeout;
 413         $oldtimeout = alarm($timeout) if $timeout;
 414
 415         &$afterfork() if $afterfork;
 416
 417         if (ref($writer)) {
 418             print $writer $input if defined $input;
 419             close $writer;
 420         }
 421
 422         my $select = new IO::Select;
 423         $select->add($reader) if ref($reader);
 424         $select->add($error);
 425
 426         my $outlog = '';
 427         my $errlog = '';
 428
 429         my $starttime = time();
 430
 431         while ($select->count) {
 432             my @handles = $select->can_read(1);
 433
 434             foreach my $h (@handles) {
 435                 my $buf = '';
 436                 my $count = sysread ($h, $buf, 4096);
 437                 if (!defined ($count)) {
 438                     my $err = $!;
 439                     kill (9, $pid);
 440                     waitpid ($pid, 0);
 441                     die $err;
 442                 }
 443                 $select->remove ($h) if !$count;
 444                 if ($h eq $reader) {
 445                     if ($outfunc || $logfunc) {
 446                         eval {
 447                             $outlog .= $buf;
 448                             while ($outlog =~ s/^([^\010\r\n]*)(\r|\n|(\010)+|\r\n)//s) {
 449                                 my $line = $1;
 450                                 &$outfunc($line) if $outfunc;
 451                                 &$logfunc($line) if $logfunc;
 452                             }
 453                         };
 454                         my $err = $@;
 455                         if ($err) {
 456                             kill (9, $pid);
 457                             waitpid ($pid, 0);
 458                             die $err;
 459                         }
 460                     } else {
 461                         print $buf;
 462                         *STDOUT->flush();
 463                     }
 464                 } elsif ($h eq $error) {
 465                     if ($errfunc || $logfunc) {
 466                         eval {
 467                             $errlog .= $buf;
 468                             while ($errlog =~ s/^([^\010\r\n]*)(\r|\n|(\010)+|\r\n)//s) {
 469                                 my $line = $1;
 470                                 &$errfunc($line) if $errfunc;
 471                                 &$logfunc($line) if $logfunc;
 472                             }
 473                         };
 474                         my $err = $@;
 475                         if ($err) {
 476                             kill (9, $pid);
 477                             waitpid ($pid, 0);
 478                             die $err;
 479                         }
 480                     } else {
 481                         print STDERR $buf;
 482                         *STDERR->flush();
 483                     }
 484                 }
 485             }
 486         }
 487
 488         &$outfunc($outlog) if $outfunc && $outlog;
 489         &$logfunc($outlog) if $logfunc && $outlog;
 490
 491         &$errfunc($errlog) if $errfunc && $errlog;
 492         &$logfunc($errlog) if $logfunc && $errlog;
 493
 494         waitpid ($pid, 0);
 495
 496         if ($? == -1) {
 497             die "failed to execute\n";
 498         } elsif (my $sig = ($? & 127)) {
 499             die "got signal $sig\n";
 500         } elsif ($exitcode = ($? >> 8)) {
 501             if (!($exitcode == 24 && ($cmdstr =~ m|^(\S+/)?rsync\s|))) {
 502                 if ($errmsg && $laststderr) {
 503                     my $lerr = $laststderr;
 504                     $laststderr = undef;
 505                     die "$lerr\n";
 506                 }
 507                 die "exit code $exitcode\n";
 508             }
 509         }
 510
 511         alarm(0);
 512     };
 513
 514     my $err = $@;
 515
 516     alarm(0);
 517
 518     if ($errmsg && $laststderr) {
 519         &$errfunc(undef); # flush laststderr
 520     }
 521
 522     umask ($old_umask) if defined($old_umask);
 523
 524     alarm($oldtimeout) if $oldtimeout;
 525
 526     if ($err) {
 527         if ($pid && ($err eq "got timeout\n")) {
 528             kill (9, $pid);
 529             waitpid ($pid, 0);
 530             die "command '$cmdstr' failed: $err";
 531         }
 532
 533         if ($errmsg) {
 534             $err =~ s/^usermod:\s*// if $cmdstr =~ m|^(\S+/)?usermod\s|;
 535             die "$errmsg: $err";
 536         } elsif(!$noerr) {
 537             die "command '$cmdstr' failed: $err";
 538         }
 539     }
 540
 541     return $exitcode;
 542 }
 543
 544 sub split_list {
 545     my $listtxt = shift || '';
 546
 547     return split (/\0/, $listtxt) if $listtxt =~ m/\0/;
 548
 549     $listtxt =~ s/[,;]/ /g;
 550     $listtxt =~ s/^\s+//;
 551
 552     my @data = split (/\s+/, $listtxt);
 553
 554     return @data;
 555 }
 556
 557 sub trim {
 558     my $txt = shift;
 559
 560     return $txt if !defined($txt);
 561
 562     $txt =~ s/^\s+//;
 563     $txt =~ s/\s+$//;
 564
 565     return $txt;
 566 }
 567
 568 # simple uri templates like "/vms/{vmid}"
 569 sub template_replace {
 570     my ($tmpl, $data) = @_;
 571
 572     return $tmpl if !$tmpl;
 573
 574     my $res = '';
 575     while ($tmpl =~ m/([^{]+)?({([^}]+)})?/g) {
 576         $res .= $1 if $1;
 577         $res .= ($data->{$3} || '-') if $2;
 578     }
 579     return $res;
 580 }
 581
 582 sub safe_print {
 583     my ($filename, $fh, $data) = @_;
 584
 585     return if !$data;
 586
 587     my $res = print $fh $data;
 588
 589     die "write to '$filename' failed\n" if !$res;
 590 }
 591
 592 sub debmirrors {
 593
 594     return {
 595         'at' => 'ftp.at.debian.org',
 596         'au' => 'ftp.au.debian.org',
 597         'be' => 'ftp.be.debian.org',
 598         'bg' => 'ftp.bg.debian.org',
 599         'br' => 'ftp.br.debian.org',
 600         'ca' => 'ftp.ca.debian.org',
 601         'ch' => 'ftp.ch.debian.org',
 602         'cl' => 'ftp.cl.debian.org',
 603         'cz' => 'ftp.cz.debian.org',
 604         'de' => 'ftp.de.debian.org',
 605         'dk' => 'ftp.dk.debian.org',
 606         'ee' => 'ftp.ee.debian.org',
 607         'es' => 'ftp.es.debian.org',
 608         'fi' => 'ftp.fi.debian.org',
 609         'fr' => 'ftp.fr.debian.org',
 610         'gr' => 'ftp.gr.debian.org',
 611         'hk' => 'ftp.hk.debian.org',
 612         'hr' => 'ftp.hr.debian.org',
 613         'hu' => 'ftp.hu.debian.org',
 614         'ie' => 'ftp.ie.debian.org',
 615         'is' => 'ftp.is.debian.org',
 616         'it' => 'ftp.it.debian.org',
 617         'jp' => 'ftp.jp.debian.org',
 618         'kr' => 'ftp.kr.debian.org',
 619         'mx' => 'ftp.mx.debian.org',
 620         'nl' => 'ftp.nl.debian.org',
 621         'no' => 'ftp.no.debian.org',
 622         'nz' => 'ftp.nz.debian.org',
 623         'pl' => 'ftp.pl.debian.org',
 624         'pt' => 'ftp.pt.debian.org',
 625         'ro' => 'ftp.ro.debian.org',
 626         'ru' => 'ftp.ru.debian.org',
 627         'se' => 'ftp.se.debian.org',
 628         'si' => 'ftp.si.debian.org',
 629         'sk' => 'ftp.sk.debian.org',
 630         'tr' => 'ftp.tr.debian.org',
 631         'tw' => 'ftp.tw.debian.org',
 632         'gb' => 'ftp.uk.debian.org',
 633         'us' => 'ftp.us.debian.org',
 634     };
 635 }
 636
 637 my $keymaphash =  {
 638     'dk'     => ['Danish', 'da', 'qwerty/dk-latin1.kmap.gz', 'dk', 'nodeadkeys'],
 639     'de'     => ['German', 'de', 'qwertz/de-latin1-nodeadkeys.kmap.gz', 'de', 'nodeadkeys' ],
 640     'de-ch'  => ['Swiss-German', 'de-ch', 'qwertz/sg-latin1.kmap.gz',  'ch', 'de_nodeadkeys' ],
 641     'en-gb'  => ['United Kingdom', 'en-gb', 'qwerty/uk.kmap.gz' , 'gb', undef],
 642     'en-us'  => ['U.S. English', 'en-us', 'qwerty/us-latin1.kmap.gz',  'us', undef ],
 643     'es'     => ['Spanish', 'es', 'qwerty/es.kmap.gz', 'es', 'nodeadkeys'],
 644     #'et'     => [], # Ethopia or Estonia ??
 645     'fi'     => ['Finnish', 'fi', 'qwerty/fi-latin1.kmap.gz', 'fi', 'nodeadkeys'],
 646     #'fo'     => ['Faroe Islands', 'fo', ???, 'fo', 'nodeadkeys'],
 647     'fr'     => ['French', 'fr', 'azerty/fr-latin1.kmap.gz', 'fr', 'nodeadkeys'],
 648     'fr-be'  => ['Belgium-French', 'fr-be', 'azerty/be2-latin1.kmap.gz', 'be', 'nodeadkeys'],
 649     'fr-ca'  => ['Canada-French', 'fr-ca', 'qwerty/cf.kmap.gz', 'ca', 'fr-legacy'],
 650     'fr-ch'  => ['Swiss-French', 'fr-ch', 'qwertz/fr_CH-latin1.kmap.gz', 'ch', 'fr_nodeadkeys'],
 651     #'hr'     => ['Croatia', 'hr', 'qwertz/croat.kmap.gz', 'hr', ??], # latin2?
 652     'hu'     => ['Hungarian', 'hu', 'qwertz/hu.kmap.gz', 'hu', undef],
 653     'is'     => ['Icelandic', 'is', 'qwerty/is-latin1.kmap.gz', 'is', 'nodeadkeys'],
 654     'it'     => ['Italian', 'it', 'qwerty/it2.kmap.gz', 'it', 'nodeadkeys'],
 655     'jp'     => ['Japanese', 'ja', 'qwerty/jp106.kmap.gz', 'jp', undef],
 656     'lt'     => ['Lithuanian', 'lt', 'qwerty/lt.kmap.gz', 'lt', 'std'],
 657     #'lv'     => ['Latvian', 'lv', 'qwerty/lv-latin4.kmap.gz', 'lv', ??], # latin4 or latin7?
 658     'mk'     => ['Macedonian', 'mk', 'qwerty/mk.kmap.gz', 'mk', 'nodeadkeys'],
 659     'nl'     => ['Dutch', 'nl', 'qwerty/nl.kmap.gz', 'nl', undef],
 660     #'nl-be'  => ['Belgium-Dutch', 'nl-be', ?, ?, ?],
 661     'no'   => ['Norwegian', 'no', 'qwerty/no-latin1.kmap.gz', 'no', 'nodeadkeys'],
 662     'pl'     => ['Polish', 'pl', 'qwerty/pl.kmap.gz', 'pl', undef],
 663     'pt'     => ['Portuguese', 'pt', 'qwerty/pt-latin1.kmap.gz', 'pt', 'nodeadkeys'],
 664     'pt-br'  => ['Brazil-Portuguese', 'pt-br', 'qwerty/br-latin1.kmap.gz', 'br', 'nodeadkeys'],
 665     #'ru'     => ['Russian', 'ru', 'qwerty/ru.kmap.gz', 'ru', undef], # dont know?
 666     'si'     => ['Slovenian', 'sl', 'qwertz/slovene.kmap.gz', 'si', undef],
 667     'se'     => ['Swedish', 'sv', 'qwerty/se-latin1.kmap.gz', 'se', 'nodeadkeys'],
 668     #'th'     => [],
 669     'tr'     => ['Turkish', 'tr', 'qwerty/trq.kmap.gz', 'tr', undef],
 670 };
 671
 672 my $kvmkeymaparray = [];
 673 foreach my $lc (keys %$keymaphash) {
 674     push @$kvmkeymaparray, $keymaphash->{$lc}->[1];
 675 }
 676
 677 sub kvmkeymaps {
 678     return $keymaphash;
 679 }
 680
 681 sub kvmkeymaplist {
 682     return $kvmkeymaparray;
 683 }
 684
 685 sub extract_param {
 686     my ($param, $key) = @_;
 687
 688     my $res = $param->{$key};
 689     delete $param->{$key};
 690
 691     return $res;
 692 }
 693
 694 # Note: we use this to wait until vncterm/spiceterm is ready
 695 sub wait_for_vnc_port {
 696     my ($port, $timeout) = @_;
 697
 698     $timeout = 5 if !$timeout;
 699     my $sleeptime = 0;
 700     my $starttime = [gettimeofday];
 701     my $elapsed;
 702
 703     while (($elapsed = tv_interval($starttime)) < $timeout) {
 704         if (my $fh = IO::File->new ("/proc/net/tcp", "r")) {
 705             while (defined (my $line = <$fh>)) {
 706                 if ($line =~ m/^\s*\d+:\s+([0-9A-Fa-f]{8}):([0-9A-Fa-f]{4})\s/) {
 707                     if ($port == hex($2)) {
 708                         close($fh);
 709                         return 1;
 710                     }
 711                 }
 712             }
 713             close($fh);
 714         }
 715         $sleeptime += 100000 if  $sleeptime < 1000000;
 716         usleep($sleeptime);
 717     }
 718
 719     return undef;
 720 }
 721
 722 sub next_unused_port {
 723     my ($range_start, $range_end, $family) = @_;
 724
 725     # We use a file to register allocated ports.
 726     # Those registrations expires after $expiretime.
 727     # We use this to avoid race conditions between
 728     # allocation and use of ports.
 729
 730     my $filename = "/var/tmp/pve-reserved-ports";
 731
 732     my $code = sub {
 733
 734         my $expiretime = 5;
 735         my $ctime = time();
 736
 737         my $ports = {};
 738
 739         if (my $fh = IO::File->new ($filename, "r")) {
 740             while (my $line = <$fh>) {
 741                 if ($line =~ m/^(\d+)\s(\d+)$/) {
 742                     my ($port, $timestamp) = ($1, $2);
 743                     if (($timestamp + $expiretime) > $ctime) {
 744                         $ports->{$port} = $timestamp; # not expired
 745                     }
 746                 }
 747             }
 748         }
 749
 750         my $newport;
 751
 752         for (my $p = $range_start; $p < $range_end; $p++) {
 753             next if $ports->{$p}; # reserved
 754
 755             my $sock = IO::Socket::IP->new(Listen => 5,
 756                                            LocalPort => $p,
 757                                            ReuseAddr => 1,
 758                                            Family    => $family,
 759                                            Proto     => 0,
 760                                            GetAddrInfoFlags => 0);
 761
 762             if ($sock) {
 763                 close($sock);
 764                 $newport = $p;
 765                 $ports->{$p} = $ctime;
 766                 last;
 767             }
 768         }
 769
 770         my $data = "";
 771         foreach my $p (keys %$ports) {
 772             $data .= "$p $ports->{$p}\n";
 773         }
 774
 775         file_set_contents($filename, $data);
 776
 777         return $newport;
 778     };
 779
 780     my $p = lock_file($filename, 10, $code);
 781     die $@ if $@;
 782
 783     die "unable to find free port (${range_start}-${range_end})\n" if !$p;
 784
 785     return $p;
 786 }
 787
 788 sub next_migrate_port {
 789     my ($family) = @_;
 790     return next_unused_port(60000, 60050, $family);
 791 }
 792
 793 sub next_vnc_port {
 794     my ($family) = @_;
 795     return next_unused_port(5900, 6000, $family);
 796 }
 797
 798 sub next_spice_port {
 799     my ($family) = @_;
 800     return next_unused_port(61000, 61099, $family);
 801 }
 802
 803 # NOTE: NFS syscall can't be interrupted, so alarm does
 804 # not work to provide timeouts.
 805 # from 'man nfs': "Only SIGKILL can interrupt a pending NFS operation"
 806 # So fork() before using Filesys::Df
 807 sub df {
 808     my ($path, $timeout) = @_;
 809
 810     my $res = {
 811         total => 0,
 812         used => 0,
 813         avail => 0,
 814     };
 815
 816     my $pipe = IO::Pipe->new();
 817     my $child = fork();
 818     if (!defined($child)) {
 819         warn "fork failed: $!\n";
 820         return $res;
 821     }
 822
 823     if (!$child) {
 824         $pipe->writer();
 825         eval {
 826             my $df = Filesys::Df::df($path, 1);
 827             print {$pipe} "$df->{blocks}\n$df->{used}\n$df->{bavail}\n";
 828             $pipe->close();
 829         };
 830         if (my $err = $@) {
 831             warn $err;
 832             POSIX::_exit(1);
 833         }
 834         POSIX::_exit(0);
 835     }
 836
 837     $pipe->reader();
 838
 839     my $readvalues = sub {
 840         $res->{total} = int(<$pipe>);
 841         $res->{used}  = int(<$pipe>);
 842         $res->{avail} = int(<$pipe>);
 843     };
 844     eval {
 845         run_with_timeout($timeout, $readvalues);
 846     };
 847     warn $@ if $@;
 848     $pipe->close();
 849     kill('KILL', $child);
 850     waitpid($child, 0);
 851     return $res;
 852 }
 853
 854 # UPID helper
 855 # We use this to uniquely identify a process.
 856 # An 'Unique Process ID' has the following format:
 857 # "UPID:$node:$pid:$pstart:$startime:$dtype:$id:$user"
 858
 859 sub upid_encode {
 860     my $d = shift;
 861
 862     # Note: pstart can be > 32bit if uptime > 497 days, so this can result in
 863     # more that 8 characters for pstart
 864     return sprintf("UPID:%s:%08X:%08X:%08X:%s:%s:%s:", $d->{node}, $d->{pid},
 865                    $d->{pstart}, $d->{starttime}, $d->{type}, $d->{id},
 866                    $d->{user});
 867 }
 868
 869 sub upid_decode {
 870     my ($upid, $noerr) = @_;
 871
 872     my $res;
 873     my $filename;
 874
 875     # "UPID:$node:$pid:$pstart:$startime:$dtype:$id:$user"
 876     # Note: allow up to 9 characters for pstart (work until 20 years uptime)
 877     if ($upid =~ m/^UPID:([a-zA-Z0-9]([a-zA-Z0-9\-]*[a-zA-Z0-9])?):([0-9A-Fa-f]{8}):([0-9A-Fa-f]{8,9}):([0-9A-Fa-f]{8}):([^:\s]+):([^:\s]*):([^:\s]+):$/) {
 878         $res->{node} = $1;
 879         $res->{pid} = hex($3);
 880         $res->{pstart} = hex($4);
 881         $res->{starttime} = hex($5);
 882         $res->{type} = $6;
 883         $res->{id} = $7;
 884         $res->{user} = $8;
 885
 886         my $subdir = substr($5, 7, 8);
 887         $filename = "$pvetaskdir/$subdir/$upid";
 888
 889     } else {
 890         return undef if $noerr;
 891         die "unable to parse worker upid '$upid'\n";
 892     }
 893
 894     return wantarray ? ($res, $filename) : $res;
 895 }
 896
 897 sub upid_open {
 898     my ($upid) = @_;
 899
 900     my ($task, $filename) = upid_decode($upid);
 901
 902     my $dirname = dirname($filename);
 903     make_path($dirname);
 904
 905     my $wwwid = getpwnam('www-data') ||
 906         die "getpwnam failed";
 907
 908     my $perm = 0640;
 909
 910     my $outfh = IO::File->new ($filename, O_WRONLY|O_CREAT|O_EXCL, $perm) ||
 911         die "unable to create output file '$filename' - $!\n";
 912     chown $wwwid, -1, $outfh;
 913
 914     return $outfh;
 915 };
 916
 917 sub upid_read_status {
 918     my ($upid) = @_;
 919
 920     my ($task, $filename) = upid_decode($upid);
 921     my $fh = IO::File->new($filename, "r");
 922     return "unable to open file - $!" if !$fh;
 923     my $maxlen = 4096;
 924     sysseek($fh, -$maxlen, 2);
 925     my $readbuf = '';
 926     my $br = sysread($fh, $readbuf, $maxlen);
 927     close($fh);
 928     if ($br) {
 929         return "unable to extract last line"
 930             if $readbuf !~ m/\n?(.+)$/;
 931         my $line = $1;
 932         if ($line =~ m/^TASK OK$/) {
 933             return 'OK';
 934         } elsif ($line =~ m/^TASK ERROR: (.+)$/) {
 935             return $1;
 936         } else {
 937             return "unexpected status";
 938         }
 939     }
 940     return "unable to read tail (got $br bytes)";
 941 }
 942
 943 # useful functions to store comments in config files
 944 sub encode_text {
 945     my ($text) = @_;
 946
 947     # all control and hi-bit characters, and ':'
 948     my $unsafe = "^\x20-\x39\x3b-\x7e";
 949     return uri_escape(Encode::encode("utf8", $text), $unsafe);
 950 }
 951
 952 sub decode_text {
 953     my ($data) = @_;
 954
 955     return Encode::decode("utf8", uri_unescape($data));
 956 }
 957
 958 sub decode_utf8_parameters {
 959     my ($param) = @_;
 960
 961     foreach my $p (qw(comment description firstname lastname)) {
 962         $param->{$p} = decode('utf8', $param->{$p}) if $param->{$p};
 963     }
 964
 965     return $param;
 966 }
 967
 968 sub random_ether_addr {
 969
 970     my ($seconds, $microseconds) = gettimeofday;
 971
 972     my $rand = Digest::SHA::sha1_hex($$, rand(), $seconds, $microseconds);
 973
 974     # clear multicast, set local id
 975     vec($rand, 0, 8) = (vec($rand, 0, 8) & 0xfe) | 2;
 976
 977     return sprintf("%02X:%02X:%02X:%02X:%02X:%02X", unpack("C6", $rand));
 978 }
 979
 980 sub shellquote {
 981     my $str = shift;
 982
 983     return String::ShellQuote::shell_quote($str);
 984 }
 985
 986 sub cmd2string {
 987     my ($cmd) = @_;
 988
 989     die "no arguments" if !$cmd;
 990
 991     return $cmd if !ref($cmd);
 992
 993     my @qa = ();
 994     foreach my $arg (@$cmd) { push @qa, shellquote($arg); }
 995
 996     return join (' ', @qa);
 997 }
 998
 999 # split an shell argument string into an array,
1000 sub split_args {
1001     my ($str) = @_;
1002
1003     return $str ? [ Text::ParseWords::shellwords($str) ] : [];
1004 }
1005
1006 sub dump_logfile {
1007     my ($filename, $start, $limit, $filter) = @_;
1008
1009     my $lines = [];
1010     my $count = 0;
1011
1012     my $fh = IO::File->new($filename, "r");
1013     if (!$fh) {
1014         $count++;
1015         push @$lines, { n => $count, t => "unable to open file - $!"};
1016         return ($count, $lines);
1017     }
1018
1019     $start = 0 if !$start;
1020     $limit = 50 if !$limit;
1021
1022     my $line;
1023
1024     if ($filter) {
1025         # duplicate code, so that we do not slow down normal path
1026         while (defined($line = <$fh>)) {
1027             next if $line !~ m/$filter/;
1028             next if $count++ < $start;
1029             next if $limit <= 0;
1030             chomp $line;
1031             push @$lines, { n => $count, t => $line};
1032             $limit--;
1033         }
1034     } else {
1035         while (defined($line = <$fh>)) {
1036             next if $count++ < $start;
1037             next if $limit <= 0;
1038             chomp $line;
1039             push @$lines, { n => $count, t => $line};
1040             $limit--;
1041         }
1042     }
1043
1044     close($fh);
1045
1046     # HACK: ExtJS store.guaranteeRange() does not like empty array
1047     # so we add a line
1048     if (!$count) {
1049         $count++;
1050         push @$lines, { n => $count, t => "no content"};
1051     }
1052
1053     return ($count, $lines);
1054 }
1055
1056 sub dump_journal {
1057     my ($start, $limit, $filter) = @_;
1058
1059     my $lines = [];
1060     my $count = 0;
1061
1062     $start = 0 if !$start;
1063     $limit = 50 if !$limit;
1064
1065     my $parser = sub {
1066         my $line = shift;
1067
1068         return if $count++ < $start;
1069         return if $limit <= 0;
1070         push @$lines, { n => int($count), t => $line};
1071         $limit--;
1072     };
1073
1074     my $cmd = ['journalctl', '-o', 'short', '--no-pager'];
1075     run_command($cmd, outfunc => $parser);
1076
1077     # HACK: ExtJS store.guaranteeRange() does not like empty array
1078     # so we add a line
1079     if (!$count) {
1080         $count++;
1081         push @$lines, { n => $count, t => "no content"};
1082     }
1083
1084     return ($count, $lines);
1085 }
1086
1087 sub dir_glob_regex {
1088     my ($dir, $regex) = @_;
1089
1090     my $dh = IO::Dir->new ($dir);
1091     return wantarray ? () : undef if !$dh;
1092
1093     while (defined(my $tmp = $dh->read)) {
1094         if (my @res = $tmp =~ m/^($regex)$/) {
1095             $dh->close;
1096             return wantarray ? @res : $tmp;
1097         }
1098     }
1099     $dh->close;
1100
1101     return wantarray ? () : undef;
1102 }
1103
1104 sub dir_glob_foreach {
1105     my ($dir, $regex, $func) = @_;
1106
1107     my $dh = IO::Dir->new ($dir);
1108     if (defined $dh) {
1109         while (defined(my $tmp = $dh->read)) {
1110             if (my @res = $tmp =~ m/^($regex)$/) {
1111                 &$func (@res);
1112             }
1113         }
1114     }
1115 }
1116
1117 sub assert_if_modified {
1118     my ($digest1, $digest2) = @_;
1119
1120     if ($digest1 && $digest2 && ($digest1 ne $digest2)) {
1121         die "detected modified configuration - file changed by other user? Try again.\n";
1122     }
1123 }
1124
1125 # Digest for short strings
1126 # like FNV32a, but we only return 31 bits (positive numbers)
1127 sub fnv31a {
1128     my ($string) = @_;
1129
1130     my $hval = 0x811c9dc5;
1131
1132     foreach my $c (unpack('C*', $string)) {
1133         $hval ^= $c;
1134         $hval += (
1135             (($hval << 1) ) +
1136             (($hval << 4) ) +
1137             (($hval << 7) ) +
1138             (($hval << 8) ) +
1139             (($hval << 24) ) );
1140         $hval = $hval & 0xffffffff;
1141     }
1142     return $hval & 0x7fffffff;
1143 }
1144
1145 sub fnv31a_hex { return sprintf("%X", fnv31a(@_)); }
1146
1147 sub unpack_sockaddr_in46 {
1148     my ($sin) = @_;
1149     my $family = Socket::sockaddr_family($sin);
1150     my ($port, $host) = ($family == AF_INET6 ? Socket::unpack_sockaddr_in6($sin)
1151                                              : Socket::unpack_sockaddr_in($sin));
1152     return ($family, $port, $host);
1153 }
1154
1155 sub getaddrinfo_all {
1156     my ($hostname, @opts) = @_;
1157     my %hints = ( flags => AI_V4MAPPED | AI_ALL,
1158                   @opts );
1159     my ($err, @res) = Socket::getaddrinfo($hostname, '0', \%hints);
1160     die "failed to get address info for: $hostname: $err\n" if $err;
1161     return @res;
1162 }
1163
1164 sub get_host_address_family {
1165     my ($hostname, $socktype) = @_;
1166     my @res = getaddrinfo_all($hostname, socktype => $socktype);
1167     return $res[0]->{family};
1168 }
1169
1170 # Parses any sane kind of host, or host+port pair:
1171 # The port is always optional and thus may be undef.
1172 sub parse_host_and_port {
1173     my ($address) = @_;
1174     if ($address =~ /^($IPV4RE|[[:alnum:]\-.]+)(?::(\d+))?$/ ||             # ipv4 or host with optional ':port'
1175         $address =~ /^\[($IPV6RE|$IPV4RE|[[:alnum:]\-.]+)\](?::(\d+))?$/ || # anything in brackets with optional ':port'
1176         $address =~ /^($IPV6RE)(?:\.(\d+))?$/)                              # ipv6 with optional port separated by dot
1177     {
1178         return ($1, $2, 1); # end with 1 to support simple if(parse...) tests
1179     }
1180     return; # nothing
1181 }
1182
1183 sub unshare($) {
1184     my ($flags) = @_;
1185     return 0 == syscall(272, $flags);
1186 }
1187
1188 1;