safe_read_from: bump default size limit to 1 MiB to match pmxcfs
[pve-common.git] / src / PVE / Tools.pm
1 package PVE::Tools;
2
3 use strict;
4 use warnings;
5
6 use Date::Format qw(time2str);
7 use Digest::MD5;
8 use Digest::SHA;
9 use Encode;
10 use Fcntl qw(:DEFAULT :flock);
11 use File::Basename;
12 use File::Path qw(make_path);
13 use Filesys::Df (); # don't overwrite our df()
14 use IO::Dir;
15 use IO::File;
16 use IO::Handle;
17 use IO::Pipe;
18 use IO::Select;
19 use IO::Socket::IP;
20 use IPC::Open3;
21 use JSON;
22 use POSIX qw(EINTR EEXIST EOPNOTSUPP);
23 use Scalar::Util 'weaken';
24 use Socket qw(AF_INET AF_INET6 AI_ALL AI_V4MAPPED AI_CANONNAME SOCK_DGRAM IPPROTO_TCP);
25 use String::ShellQuote;
26 use Text::ParseWords;
27 use Time::HiRes qw(usleep gettimeofday tv_interval alarm);
28 use URI::Escape;
29 use base 'Exporter';
30
31 use PVE::Syscall;
32
33 # avoid warning when parsing long hex values with hex()
34 no warnings 'portable'; # Support for 64-bit ints required
35
36 our @EXPORT_OK = qw(
37 $IPV6RE
38 $IPV4RE
39 lock_file
40 lock_file_full
41 run_command
42 file_set_contents
43 file_get_contents
44 file_read_firstline
45 dir_glob_regex
46 dir_glob_foreach
47 split_list
48 template_replace
49 safe_print
50 trim
51 extract_param
52 extract_sensitive_params
53 file_copy
54 get_host_arch
55 O_PATH
56 O_TMPFILE
57 AT_EMPTY_PATH
58 AT_FDCWD
59 CLONE_NEWNS
60 CLONE_NEWUTS
61 CLONE_NEWIPC
62 CLONE_NEWUSER
63 CLONE_NEWPID
64 CLONE_NEWNET
65 );
66
67 my $pvelogdir = "/var/log/pve";
68 my $pvetaskdir = "$pvelogdir/tasks";
69
70 mkdir $pvelogdir;
71 mkdir $pvetaskdir;
72
73 my $IPV4OCTET = "(?:25[0-5]|(?:2[0-4]|1[0-9]|[1-9])?[0-9])";
74 our $IPV4RE = "(?:(?:$IPV4OCTET\\.){3}$IPV4OCTET)";
75 my $IPV6H16 = "(?:[0-9a-fA-F]{1,4})";
76 my $IPV6LS32 = "(?:(?:$IPV4RE|$IPV6H16:$IPV6H16))";
77
78 our $IPV6RE = "(?:" .
79 "(?:(?:" . "(?:$IPV6H16:){6})$IPV6LS32)|" .
80 "(?:(?:" . "::(?:$IPV6H16:){5})$IPV6LS32)|" .
81 "(?:(?:(?:" . "$IPV6H16)?::(?:$IPV6H16:){4})$IPV6LS32)|" .
82 "(?:(?:(?:(?:$IPV6H16:){0,1}$IPV6H16)?::(?:$IPV6H16:){3})$IPV6LS32)|" .
83 "(?:(?:(?:(?:$IPV6H16:){0,2}$IPV6H16)?::(?:$IPV6H16:){2})$IPV6LS32)|" .
84 "(?:(?:(?:(?:$IPV6H16:){0,3}$IPV6H16)?::(?:$IPV6H16:){1})$IPV6LS32)|" .
85 "(?:(?:(?:(?:$IPV6H16:){0,4}$IPV6H16)?::" . ")$IPV6LS32)|" .
86 "(?:(?:(?:(?:$IPV6H16:){0,5}$IPV6H16)?::" . ")$IPV6H16)|" .
87 "(?:(?:(?:(?:$IPV6H16:){0,6}$IPV6H16)?::" . ")))";
88
89 our $IPRE = "(?:$IPV4RE|$IPV6RE)";
90
91 our $EMAIL_USER_RE = qr/[\w\+\-\~]+(\.[\w\+\-\~]+)*/;
92 our $EMAIL_RE = qr/$EMAIL_USER_RE@[a-zA-Z0-9\-]+(\.[a-zA-Z0-9\-]+)*/;
93
94 use constant {CLONE_NEWNS => 0x00020000,
95 CLONE_NEWUTS => 0x04000000,
96 CLONE_NEWIPC => 0x08000000,
97 CLONE_NEWUSER => 0x10000000,
98 CLONE_NEWPID => 0x20000000,
99 CLONE_NEWNET => 0x40000000};
100
101 use constant {O_PATH => 0x00200000,
102 O_CLOEXEC => 0x00080000,
103 O_TMPFILE => 0x00410000}; # This includes O_DIRECTORY
104
105 use constant {AT_EMPTY_PATH => 0x1000,
106 AT_FDCWD => -100};
107
108 # from <linux/fs.h>
109 use constant {RENAME_NOREPLACE => (1 << 0),
110 RENAME_EXCHANGE => (1 << 1),
111 RENAME_WHITEOUT => (1 << 2)};
112
113 sub run_with_timeout {
114 my ($timeout, $code, @param) = @_;
115
116 die "got timeout\n" if $timeout <= 0;
117
118 my $prev_alarm = alarm 0; # suspend outer alarm early
119
120 my $sigcount = 0;
121
122 my $res;
123
124 eval {
125 local $SIG{ALRM} = sub { $sigcount++; die "got timeout\n"; };
126 local $SIG{PIPE} = sub { $sigcount++; die "broken pipe\n" };
127 local $SIG{__DIE__}; # see SA bug 4631
128
129 alarm($timeout);
130
131 eval { $res = &$code(@param); };
132
133 alarm(0); # avoid race conditions
134
135 die $@ if $@;
136 };
137
138 my $err = $@;
139
140 alarm $prev_alarm;
141
142 # this shouldn't happen anymore?
143 die "unknown error" if $sigcount && !$err; # seems to happen sometimes
144
145 die $err if $err;
146
147 return $res;
148 }
149
150 # flock: we use one file handle per process, so lock file
151 # can be nested multiple times and succeeds for the same process.
152 #
153 # Since this is the only way we lock now and we don't have the old
154 # 'lock(); code(); unlock();' pattern anymore we do not actually need to
155 # count how deep we're nesting. Therefore this hash now stores a weak reference
156 # to a boolean telling us whether we already have a lock.
157
158 my $lock_handles = {};
159
160 sub lock_file_full {
161 my ($filename, $timeout, $shared, $code, @param) = @_;
162
163 $timeout = 10 if !$timeout;
164
165 my $mode = $shared ? LOCK_SH : LOCK_EX;
166
167 my $lockhash = ($lock_handles->{$$} //= {});
168
169 # Returns a locked file handle.
170 my $get_locked_file = sub {
171 my $fh = IO::File->new(">>$filename")
172 or die "can't open file - $!\n";
173
174 if (!flock($fh, $mode|LOCK_NB)) {
175 print STDERR "trying to acquire lock...\n";
176 my $success;
177 while(1) {
178 $success = flock($fh, $mode);
179 # try again on EINTR (see bug #273)
180 if ($success || ($! != EINTR)) {
181 last;
182 }
183 }
184 if (!$success) {
185 print STDERR " failed\n";
186 die "can't acquire lock '$filename' - $!\n";
187 }
188 print STDERR " OK\n";
189 }
190
191 return $fh;
192 };
193
194 my $res;
195 my $checkptr = $lockhash->{$filename};
196 my $check = 0; # This must not go out of scope before running the code.
197 my $local_fh; # This must stay local
198 if (!$checkptr || !$$checkptr) {
199 # We cannot create a weak reference in a single atomic step, so we first
200 # create a false-value, then create a reference to it, then weaken it,
201 # and after successfully locking the file we change the boolean value.
202 #
203 # The reason for this is that if an outer SIGALRM throws an exception
204 # between creating the reference and weakening it, a subsequent call to
205 # lock_file_full() will see a leftover full reference to a valid
206 # variable. This variable must be 0 in order for said call to attempt to
207 # lock the file anew.
208 #
209 # An externally triggered exception elsewhere in the code will cause the
210 # weak reference to become 'undef', and since the file handle is only
211 # stored in the local scope in $local_fh, the file will be closed by
212 # perl's cleanup routines as well.
213 #
214 # This still assumes that an IO::File handle can properly deal with such
215 # exceptions thrown during its own destruction, but that's up to perls
216 # guts now.
217 $lockhash->{$filename} = \$check;
218 weaken $lockhash->{$filename};
219 $local_fh = eval { run_with_timeout($timeout, $get_locked_file) };
220 if ($@) {
221 $@ = "can't lock file '$filename' - $@";
222 return undef;
223 }
224 $check = 1;
225 }
226 $res = eval { &$code(@param); };
227 return undef if $@;
228 return $res;
229 }
230
231
232 sub lock_file {
233 my ($filename, $timeout, $code, @param) = @_;
234
235 return lock_file_full($filename, $timeout, 0, $code, @param);
236 }
237
238 sub file_set_contents {
239 my ($filename, $data, $perm) = @_;
240
241 $perm = 0644 if !defined($perm);
242
243 my $tmpname = "$filename.tmp.$$";
244
245 eval {
246 my ($fh, $tries) = (undef, 0);
247 while (!$fh && $tries++ < 3) {
248 $fh = IO::File->new($tmpname, O_WRONLY|O_CREAT|O_EXCL, $perm);
249 if (!$fh && $! == EEXIST) {
250 unlink($tmpname) or die "unable to delete old temp file: $!\n";
251 }
252 }
253 die "unable to open file '$tmpname' - $!\n" if !$fh;
254 die "unable to write '$tmpname' - $!\n" unless print $fh $data;
255 die "closing file '$tmpname' failed - $!\n" unless close $fh;
256 };
257 my $err = $@;
258
259 if ($err) {
260 unlink $tmpname;
261 die $err;
262 }
263
264 if (!rename($tmpname, $filename)) {
265 my $msg = "close (rename) atomic file '$filename' failed: $!\n";
266 unlink $tmpname;
267 die $msg;
268 }
269 }
270
271 sub file_get_contents {
272 my ($filename, $max) = @_;
273
274 my $fh = IO::File->new($filename, "r") ||
275 die "can't open '$filename' - $!\n";
276
277 my $content = safe_read_from($fh, $max, 0, $filename);
278
279 close $fh;
280
281 return $content;
282 }
283
284 sub file_copy {
285 my ($filename, $dst, $max, $perm) = @_;
286
287 file_set_contents ($dst, file_get_contents($filename, $max), $perm);
288 }
289
290 sub file_read_firstline {
291 my ($filename) = @_;
292
293 my $fh = IO::File->new ($filename, "r");
294 return undef if !$fh;
295 my $res = <$fh>;
296 chomp $res if $res;
297 $fh->close;
298 return $res;
299 }
300
301 sub safe_read_from {
302 my ($fh, $max, $oneline, $filename) = @_;
303
304 # pmxcfs file size limit
305 $max = 1024 * 1024 if !$max;
306
307 my $subject = defined($filename) ? "file '$filename'" : 'input';
308
309 my $br = 0;
310 my $input = '';
311 my $count;
312 while ($count = sysread($fh, $input, 8192, $br)) {
313 $br += $count;
314 die "$subject too long - aborting\n" if $br > $max;
315 if ($oneline && $input =~ m/^(.*)\n/) {
316 $input = $1;
317 last;
318 }
319 }
320 die "unable to read $subject - $!\n" if !defined($count);
321
322 return $input;
323 }
324
325 # The $cmd parameter can be:
326 # -) a string
327 # This is generally executed by passing it to the shell with the -c option.
328 # However, it can be executed in one of two ways, depending on whether
329 # there's a pipe involved:
330 # *) with pipe: passed explicitly to bash -c, prefixed with:
331 # set -o pipefail &&
332 # *) without a pipe: passed to perl's open3 which uses 'sh -c'
333 # (Note that this may result in two different syntax requirements!)
334 # FIXME?
335 # -) an array of arguments (strings)
336 # Will be executed without interference from a shell. (Parameters are passed
337 # as is, no escape sequences of strings will be touched.)
338 # -) an array of arrays
339 # Each array represents a command, and each command's output is piped into
340 # the following command's standard input.
341 # For this a shell command string is created with pipe symbols between each
342 # command.
343 # Each command is a list of strings meant to end up in the final command
344 # unchanged. In order to achieve this, every argument is shell-quoted.
345 # Quoting can be disabled for a particular argument by turning it into a
346 # reference, this allows inserting arbitrary shell options.
347 # For instance: the $cmd [ [ 'echo', 'hello', \'>/dev/null' ] ] will not
348 # produce any output, while the $cmd [ [ 'echo', 'hello', '>/dev/null' ] ]
349 # will literally print: hello >/dev/null
350 sub run_command {
351 my ($cmd, %param) = @_;
352
353 my $old_umask;
354 my $cmdstr;
355
356 if (my $ref = ref($cmd)) {
357 if (ref($cmd->[0])) {
358 $cmdstr = 'set -o pipefail && ';
359 my $pipe = '';
360 foreach my $command (@$cmd) {
361 # concatenate quoted parameters
362 # strings which are passed by reference are NOT shell quoted
363 $cmdstr .= $pipe . join(' ', map { ref($_) ? $$_ : shellquote($_) } @$command);
364 $pipe = ' | ';
365 }
366 $cmd = [ '/bin/bash', '-c', "$cmdstr" ];
367 } else {
368 $cmdstr = cmd2string($cmd);
369 }
370 } else {
371 $cmdstr = $cmd;
372 if ($cmd =~ m/\|/) {
373 # see 'man bash' for option pipefail
374 $cmd = [ '/bin/bash', '-c', "set -o pipefail && $cmd" ];
375 } else {
376 $cmd = [ $cmd ];
377 }
378 }
379
380 my $errmsg;
381 my $laststderr;
382 my $timeout;
383 my $oldtimeout;
384 my $pid;
385 my $exitcode = -1;
386
387 my $outfunc;
388 my $errfunc;
389 my $logfunc;
390 my $input;
391 my $output;
392 my $afterfork;
393 my $noerr;
394 my $keeplocale;
395 my $quiet;
396
397 eval {
398
399 foreach my $p (keys %param) {
400 if ($p eq 'timeout') {
401 $timeout = $param{$p};
402 } elsif ($p eq 'umask') {
403 $old_umask = umask($param{$p});
404 } elsif ($p eq 'errmsg') {
405 $errmsg = $param{$p};
406 } elsif ($p eq 'input') {
407 $input = $param{$p};
408 } elsif ($p eq 'output') {
409 $output = $param{$p};
410 } elsif ($p eq 'outfunc') {
411 $outfunc = $param{$p};
412 } elsif ($p eq 'errfunc') {
413 $errfunc = $param{$p};
414 } elsif ($p eq 'logfunc') {
415 $logfunc = $param{$p};
416 } elsif ($p eq 'afterfork') {
417 $afterfork = $param{$p};
418 } elsif ($p eq 'noerr') {
419 $noerr = $param{$p};
420 } elsif ($p eq 'keeplocale') {
421 $keeplocale = $param{$p};
422 } elsif ($p eq 'quiet') {
423 $quiet = $param{$p};
424 } else {
425 die "got unknown parameter '$p' for run_command\n";
426 }
427 }
428
429 if ($errmsg) {
430 my $origerrfunc = $errfunc;
431 $errfunc = sub {
432 if ($laststderr) {
433 if ($origerrfunc) {
434 &$origerrfunc("$laststderr\n");
435 } else {
436 print STDERR "$laststderr\n" if $laststderr;
437 }
438 }
439 $laststderr = shift;
440 };
441 }
442
443 my $reader = $output && $output =~ m/^>&/ ? $output : IO::File->new();
444 my $writer = $input && $input =~ m/^<&/ ? $input : IO::File->new();
445 my $error = IO::File->new();
446
447 my $orig_pid = $$;
448
449 eval {
450 local $ENV{LC_ALL} = 'C' if !$keeplocale;
451
452 # suppress LVM warnings like: "File descriptor 3 left open";
453 local $ENV{LVM_SUPPRESS_FD_WARNINGS} = "1";
454
455 $pid = open3($writer, $reader, $error, @$cmd) || die $!;
456
457 # if we pipe fron STDIN, open3 closes STDIN, so we get a perl warning like
458 # "Filehandle STDIN reopened as GENXYZ .. " as soon as we open a new file.
459 # to avoid that we open /dev/null
460 if (!ref($writer) && !defined(fileno(STDIN))) {
461 POSIX::close(0);
462 open(STDIN, '<', '/dev/null');
463 }
464 };
465
466 my $err = $@;
467
468 # catch exec errors
469 if ($orig_pid != $$) {
470 warn "ERROR: $err";
471 POSIX::_exit (1);
472 kill ('KILL', $$);
473 }
474
475 die $err if $err;
476
477 local $SIG{ALRM} = sub { die "got timeout\n"; } if $timeout;
478 $oldtimeout = alarm($timeout) if $timeout;
479
480 &$afterfork() if $afterfork;
481
482 if (ref($writer)) {
483 print $writer $input if defined $input;
484 close $writer;
485 }
486
487 my $select = IO::Select->new();
488 $select->add($reader) if ref($reader);
489 $select->add($error);
490
491 my $outlog = '';
492 my $errlog = '';
493
494 my $starttime = time();
495
496 while ($select->count) {
497 my @handles = $select->can_read(1);
498
499 foreach my $h (@handles) {
500 my $buf = '';
501 my $count = sysread ($h, $buf, 4096);
502 if (!defined ($count)) {
503 my $err = $!;
504 kill (9, $pid);
505 waitpid ($pid, 0);
506 die $err;
507 }
508 $select->remove ($h) if !$count;
509 if ($h eq $reader) {
510 if ($outfunc || $logfunc) {
511 eval {
512 while ($buf =~ s/^([^\010\r\n]*)(?:\n|(?:\010)+|\r\n?)//) {
513 my $line = $outlog . $1;
514 $outlog = '';
515 &$outfunc($line) if $outfunc;
516 &$logfunc($line) if $logfunc;
517 }
518 $outlog .= $buf;
519 };
520 my $err = $@;
521 if ($err) {
522 kill (9, $pid);
523 waitpid ($pid, 0);
524 die $err;
525 }
526 } elsif (!$quiet) {
527 print $buf;
528 *STDOUT->flush();
529 }
530 } elsif ($h eq $error) {
531 if ($errfunc || $logfunc) {
532 eval {
533 while ($buf =~ s/^([^\010\r\n]*)(?:\n|(?:\010)+|\r\n?)//) {
534 my $line = $errlog . $1;
535 $errlog = '';
536 &$errfunc($line) if $errfunc;
537 &$logfunc($line) if $logfunc;
538 }
539 $errlog .= $buf;
540 };
541 my $err = $@;
542 if ($err) {
543 kill (9, $pid);
544 waitpid ($pid, 0);
545 die $err;
546 }
547 } elsif (!$quiet) {
548 print STDERR $buf;
549 *STDERR->flush();
550 }
551 }
552 }
553 }
554
555 &$outfunc($outlog) if $outfunc && $outlog;
556 &$logfunc($outlog) if $logfunc && $outlog;
557
558 &$errfunc($errlog) if $errfunc && $errlog;
559 &$logfunc($errlog) if $logfunc && $errlog;
560
561 waitpid ($pid, 0);
562
563 if ($? == -1) {
564 die "failed to execute\n";
565 } elsif (my $sig = ($? & 127)) {
566 die "got signal $sig\n";
567 } elsif ($exitcode = ($? >> 8)) {
568 if (!($exitcode == 24 && ($cmdstr =~ m|^(\S+/)?rsync\s|))) {
569 if ($errmsg && $laststderr) {
570 my $lerr = $laststderr;
571 $laststderr = undef;
572 die "$lerr\n";
573 }
574 die "exit code $exitcode\n";
575 }
576 }
577
578 alarm(0);
579 };
580
581 my $err = $@;
582
583 alarm(0);
584
585 if ($errmsg && $laststderr) {
586 &$errfunc(undef); # flush laststderr
587 }
588
589 umask ($old_umask) if defined($old_umask);
590
591 alarm($oldtimeout) if $oldtimeout;
592
593 if ($err) {
594 if ($pid && ($err eq "got timeout\n")) {
595 kill (9, $pid);
596 waitpid ($pid, 0);
597 die "command '$cmdstr' failed: $err";
598 }
599
600 if ($errmsg) {
601 $err =~ s/^usermod:\s*// if $cmdstr =~ m|^(\S+/)?usermod\s|;
602 die "$errmsg: $err";
603 } elsif(!$noerr) {
604 die "command '$cmdstr' failed: $err";
605 }
606 }
607
608 return $exitcode;
609 }
610
611 # Run a command with a tcp socket as standard input.
612 sub pipe_socket_to_command {
613 my ($cmd, $ip, $port) = @_;
614
615 my $params = {
616 Listen => 1,
617 ReuseAddr => 1,
618 Proto => &Socket::IPPROTO_TCP,
619 GetAddrInfoFlags => 0,
620 LocalAddr => $ip,
621 LocalPort => $port,
622 };
623 my $socket = IO::Socket::IP->new(%$params) or die "failed to open socket: $!\n";
624
625 print "$ip\n$port\n"; # tell remote where to connect
626 *STDOUT->flush();
627
628 alarm 0;
629 local $SIG{ALRM} = sub { die "timed out waiting for client\n" };
630 alarm 30;
631 my $client = $socket->accept; # Wait for a client
632 alarm 0;
633 close($socket);
634
635 # We want that the command talks over the TCP socket and takes
636 # ownership of it, so that when it closes it the connection is
637 # terminated, so we need to be able to close the socket. So we
638 # can't really use PVE::Tools::run_command().
639 my $pid = fork() // die "fork failed: $!\n";
640 if (!$pid) {
641 POSIX::dup2(fileno($client), 0);
642 POSIX::dup2(fileno($client), 1);
643 close($client);
644 exec {$cmd->[0]} @$cmd or do {
645 warn "exec failed: $!\n";
646 POSIX::_exit(1);
647 };
648 }
649
650 close($client);
651 if (waitpid($pid, 0) != $pid) {
652 kill(15 => $pid); # if we got interrupted terminate the child
653 my $count = 0;
654 while (waitpid($pid, POSIX::WNOHANG) != $pid) {
655 usleep(100000);
656 $count++;
657 kill(9 => $pid), last if $count > 300; # 30 second timeout
658 }
659 }
660 if (my $sig = ($? & 127)) {
661 die "got signal $sig\n";
662 } elsif (my $exitcode = ($? >> 8)) {
663 die "exit code $exitcode\n";
664 }
665
666 return undef;
667 }
668
669 sub split_list {
670 my $listtxt = shift // '';
671
672 return split (/\0/, $listtxt) if $listtxt =~ m/\0/;
673
674 $listtxt =~ s/[,;]/ /g;
675 $listtxt =~ s/^\s+//;
676
677 my @data = split (/\s+/, $listtxt);
678
679 return @data;
680 }
681
682 sub trim {
683 my $txt = shift;
684
685 return $txt if !defined($txt);
686
687 $txt =~ s/^\s+//;
688 $txt =~ s/\s+$//;
689
690 return $txt;
691 }
692
693 # simple uri templates like "/vms/{vmid}"
694 sub template_replace {
695 my ($tmpl, $data) = @_;
696
697 return $tmpl if !$tmpl;
698
699 my $res = '';
700 while ($tmpl =~ m/([^{]+)?(\{([^}]+)\})?/g) {
701 $res .= $1 if $1;
702 $res .= ($data->{$3} || '-') if $2;
703 }
704 return $res;
705 }
706
707 sub safe_print {
708 my ($filename, $fh, $data) = @_;
709
710 return if !$data;
711
712 my $res = print $fh $data;
713
714 die "write to '$filename' failed\n" if !$res;
715 }
716
717 sub debmirrors {
718
719 return {
720 'at' => 'ftp.at.debian.org',
721 'au' => 'ftp.au.debian.org',
722 'be' => 'ftp.be.debian.org',
723 'bg' => 'ftp.bg.debian.org',
724 'br' => 'ftp.br.debian.org',
725 'ca' => 'ftp.ca.debian.org',
726 'ch' => 'ftp.ch.debian.org',
727 'cl' => 'ftp.cl.debian.org',
728 'cz' => 'ftp.cz.debian.org',
729 'de' => 'ftp.de.debian.org',
730 'dk' => 'ftp.dk.debian.org',
731 'ee' => 'ftp.ee.debian.org',
732 'es' => 'ftp.es.debian.org',
733 'fi' => 'ftp.fi.debian.org',
734 'fr' => 'ftp.fr.debian.org',
735 'gr' => 'ftp.gr.debian.org',
736 'hk' => 'ftp.hk.debian.org',
737 'hr' => 'ftp.hr.debian.org',
738 'hu' => 'ftp.hu.debian.org',
739 'ie' => 'ftp.ie.debian.org',
740 'is' => 'ftp.is.debian.org',
741 'it' => 'ftp.it.debian.org',
742 'jp' => 'ftp.jp.debian.org',
743 'kr' => 'ftp.kr.debian.org',
744 'mx' => 'ftp.mx.debian.org',
745 'nl' => 'ftp.nl.debian.org',
746 'no' => 'ftp.no.debian.org',
747 'nz' => 'ftp.nz.debian.org',
748 'pl' => 'ftp.pl.debian.org',
749 'pt' => 'ftp.pt.debian.org',
750 'ro' => 'ftp.ro.debian.org',
751 'ru' => 'ftp.ru.debian.org',
752 'se' => 'ftp.se.debian.org',
753 'si' => 'ftp.si.debian.org',
754 'sk' => 'ftp.sk.debian.org',
755 'tr' => 'ftp.tr.debian.org',
756 'tw' => 'ftp.tw.debian.org',
757 'gb' => 'ftp.uk.debian.org',
758 'us' => 'ftp.us.debian.org',
759 };
760 }
761
762 my $keymaphash = {
763 'dk' => ['Danish', 'da', 'qwerty/dk-latin1.kmap.gz', 'dk', 'nodeadkeys'],
764 'de' => ['German', 'de', 'qwertz/de-latin1-nodeadkeys.kmap.gz', 'de', 'nodeadkeys' ],
765 'de-ch' => ['Swiss-German', 'de-ch', 'qwertz/sg-latin1.kmap.gz', 'ch', 'de_nodeadkeys' ],
766 'en-gb' => ['United Kingdom', 'en-gb', 'qwerty/uk.kmap.gz' , 'gb', undef],
767 'en-us' => ['U.S. English', 'en-us', 'qwerty/us-latin1.kmap.gz', 'us', undef ],
768 'es' => ['Spanish', 'es', 'qwerty/es.kmap.gz', 'es', 'nodeadkeys'],
769 #'et' => [], # Ethopia or Estonia ??
770 'fi' => ['Finnish', 'fi', 'qwerty/fi-latin1.kmap.gz', 'fi', 'nodeadkeys'],
771 #'fo' => ['Faroe Islands', 'fo', ???, 'fo', 'nodeadkeys'],
772 'fr' => ['French', 'fr', 'azerty/fr-latin1.kmap.gz', 'fr', 'nodeadkeys'],
773 'fr-be' => ['Belgium-French', 'fr-be', 'azerty/be2-latin1.kmap.gz', 'be', 'nodeadkeys'],
774 'fr-ca' => ['Canada-French', 'fr-ca', 'qwerty/cf.kmap.gz', 'ca', 'fr-legacy'],
775 'fr-ch' => ['Swiss-French', 'fr-ch', 'qwertz/fr_CH-latin1.kmap.gz', 'ch', 'fr_nodeadkeys'],
776 #'hr' => ['Croatia', 'hr', 'qwertz/croat.kmap.gz', 'hr', ??], # latin2?
777 'hu' => ['Hungarian', 'hu', 'qwertz/hu.kmap.gz', 'hu', undef],
778 'is' => ['Icelandic', 'is', 'qwerty/is-latin1.kmap.gz', 'is', 'nodeadkeys'],
779 'it' => ['Italian', 'it', 'qwerty/it2.kmap.gz', 'it', 'nodeadkeys'],
780 'jp' => ['Japanese', 'ja', 'qwerty/jp106.kmap.gz', 'jp', undef],
781 'lt' => ['Lithuanian', 'lt', 'qwerty/lt.kmap.gz', 'lt', 'std'],
782 #'lv' => ['Latvian', 'lv', 'qwerty/lv-latin4.kmap.gz', 'lv', ??], # latin4 or latin7?
783 'mk' => ['Macedonian', 'mk', 'qwerty/mk.kmap.gz', 'mk', 'nodeadkeys'],
784 'nl' => ['Dutch', 'nl', 'qwerty/nl.kmap.gz', 'nl', undef],
785 #'nl-be' => ['Belgium-Dutch', 'nl-be', ?, ?, ?],
786 'no' => ['Norwegian', 'no', 'qwerty/no-latin1.kmap.gz', 'no', 'nodeadkeys'],
787 'pl' => ['Polish', 'pl', 'qwerty/pl.kmap.gz', 'pl', undef],
788 'pt' => ['Portuguese', 'pt', 'qwerty/pt-latin1.kmap.gz', 'pt', 'nodeadkeys'],
789 'pt-br' => ['Brazil-Portuguese', 'pt-br', 'qwerty/br-latin1.kmap.gz', 'br', 'nodeadkeys'],
790 #'ru' => ['Russian', 'ru', 'qwerty/ru.kmap.gz', 'ru', undef], # don't know?
791 'si' => ['Slovenian', 'sl', 'qwertz/slovene.kmap.gz', 'si', undef],
792 'se' => ['Swedish', 'sv', 'qwerty/se-latin1.kmap.gz', 'se', 'nodeadkeys'],
793 #'th' => [],
794 'tr' => ['Turkish', 'tr', 'qwerty/trq.kmap.gz', 'tr', undef],
795 };
796
797 my $kvmkeymaparray = [];
798 foreach my $lc (sort keys %$keymaphash) {
799 push @$kvmkeymaparray, $keymaphash->{$lc}->[1];
800 }
801
802 sub kvmkeymaps {
803 return $keymaphash;
804 }
805
806 sub kvmkeymaplist {
807 return $kvmkeymaparray;
808 }
809
810 sub extract_param {
811 my ($param, $key) = @_;
812
813 my $res = $param->{$key};
814 delete $param->{$key};
815
816 return $res;
817 }
818
819 # For extracting sensitive keys (e.g. password), to avoid writing them to www-data owned configs
820 sub extract_sensitive_params :prototype($$$) {
821 my ($param, $sensitive_list, $delete_list) = @_;
822
823 my %delete = map { $_ => 1 } ($delete_list || [])->@*;
824
825 my $sensitive = {};
826 for my $opt (@$sensitive_list) {
827 # handle deletions as explicitly setting `undef`, so subs which only have $param but not
828 # $delete_list available can recognize them. Afterwards new values may override.
829 if (exists($delete{$opt})) {
830 $sensitive->{$opt} = undef;
831 }
832
833 if (defined(my $value = extract_param($param, $opt))) {
834 $sensitive->{$opt} = $value;
835 }
836 }
837
838 return $sensitive;
839 }
840
841 # Note: we use this to wait until vncterm/spiceterm is ready
842 sub wait_for_vnc_port {
843 my ($port, $family, $timeout) = @_;
844
845 $timeout = 5 if !$timeout;
846 my $sleeptime = 0;
847 my $starttime = [gettimeofday];
848 my $elapsed;
849
850 my $cmd = ['/bin/ss', '-Htln', "sport = :$port"];
851 push @$cmd, $family == AF_INET6 ? '-6' : '-4' if defined($family);
852
853 my $found;
854 while (($elapsed = tv_interval($starttime)) < $timeout) {
855 # -Htln = don't print header, tcp, listening sockets only, numeric ports
856 run_command($cmd, outfunc => sub {
857 my $line = shift;
858 if ($line =~ m/^LISTEN\s+\d+\s+\d+\s+\S+:(\d+)\s/) {
859 $found = 1 if ($port == $1);
860 }
861 });
862 return 1 if $found;
863 $sleeptime += 100000 if $sleeptime < 1000000;
864 usleep($sleeptime);
865 }
866
867 die "Timeout while waiting for port '$port' to get ready!\n";
868 }
869
870 sub next_unused_port {
871 my ($range_start, $range_end, $family, $address) = @_;
872
873 # We use a file to register allocated ports.
874 # Those registrations expires after $expiretime.
875 # We use this to avoid race conditions between
876 # allocation and use of ports.
877
878 my $filename = "/var/tmp/pve-reserved-ports";
879
880 my $code = sub {
881
882 my $expiretime = 5;
883 my $ctime = time();
884
885 my $ports = {};
886
887 if (my $fh = IO::File->new ($filename, "r")) {
888 while (my $line = <$fh>) {
889 if ($line =~ m/^(\d+)\s(\d+)$/) {
890 my ($port, $timestamp) = ($1, $2);
891 if (($timestamp + $expiretime) > $ctime) {
892 $ports->{$port} = $timestamp; # not expired
893 }
894 }
895 }
896 }
897
898 my $newport;
899 my %sockargs = (Listen => 5,
900 ReuseAddr => 1,
901 Family => $family,
902 Proto => IPPROTO_TCP,
903 GetAddrInfoFlags => 0);
904 $sockargs{LocalAddr} = $address if defined($address);
905
906 for (my $p = $range_start; $p < $range_end; $p++) {
907 next if $ports->{$p}; # reserved
908
909 $sockargs{LocalPort} = $p;
910 my $sock = IO::Socket::IP->new(%sockargs);
911
912 if ($sock) {
913 close($sock);
914 $newport = $p;
915 $ports->{$p} = $ctime;
916 last;
917 }
918 }
919
920 my $data = "";
921 foreach my $p (keys %$ports) {
922 $data .= "$p $ports->{$p}\n";
923 }
924
925 file_set_contents($filename, $data);
926
927 return $newport;
928 };
929
930 my $p = lock_file('/var/lock/pve-ports.lck', 10, $code);
931 die $@ if $@;
932
933 die "unable to find free port (${range_start}-${range_end})\n" if !$p;
934
935 return $p;
936 }
937
938 sub next_migrate_port {
939 my ($family, $address) = @_;
940 return next_unused_port(60000, 60050, $family, $address);
941 }
942
943 sub next_vnc_port {
944 my ($family, $address) = @_;
945 return next_unused_port(5900, 6000, $family, $address);
946 }
947
948 sub spice_port_range {
949 return (61000, 61999);
950 }
951
952 sub next_spice_port {
953 my ($family, $address) = @_;
954 return next_unused_port(spice_port_range(), $family, $address);
955 }
956
957 sub must_stringify {
958 my ($value) = @_;
959 eval { $value = "$value" };
960 return "error turning value into a string: $@" if $@;
961 return $value;
962 }
963
964 # sigkill after $timeout a $sub running in a fork if it can't write a pipe
965 # the $sub has to return a single scalar
966 sub run_fork_with_timeout {
967 my ($timeout, $sub) = @_;
968
969 my $res;
970 my $error;
971 my $pipe_out = IO::Pipe->new();
972
973 # disable pending alarms, save their remaining time
974 my $prev_alarm = alarm 0;
975
976 # avoid leaving a zombie if the parent gets interrupted
977 my $sig_received;
978
979 my $child = fork();
980 if (!defined($child)) {
981 die "fork failed: $!\n";
982 return $res;
983 }
984
985 if (!$child) {
986 $pipe_out->writer();
987
988 eval {
989 $res = $sub->();
990 print {$pipe_out} encode_json({ result => $res });
991 $pipe_out->flush();
992 };
993 if (my $err = $@) {
994 print {$pipe_out} encode_json({ error => must_stringify($err) });
995 $pipe_out->flush();
996 POSIX::_exit(1);
997 }
998 POSIX::_exit(0);
999 }
1000
1001 local $SIG{INT} = sub { $sig_received++; };
1002 local $SIG{TERM} = sub {
1003 $error //= "interrupted by unexpected signal\n";
1004 kill('TERM', $child);
1005 };
1006
1007 $pipe_out->reader();
1008
1009 my $readvalues = sub {
1010 local $/ = undef;
1011 my $child_res = decode_json(readline_nointr($pipe_out));
1012 $res = $child_res->{result};
1013 $error = $child_res->{error};
1014 };
1015 eval {
1016 if (defined($timeout)) {
1017 run_with_timeout($timeout, $readvalues);
1018 } else {
1019 $readvalues->();
1020 }
1021 };
1022 warn $@ if $@;
1023 $pipe_out->close();
1024 kill('KILL', $child);
1025 waitpid($child, 0);
1026
1027 alarm $prev_alarm;
1028 die "interrupted by unexpected signal\n" if $sig_received;
1029
1030 die $error if $error;
1031 return $res;
1032 }
1033
1034 sub run_fork {
1035 my ($code) = @_;
1036 return run_fork_with_timeout(undef, $code);
1037 }
1038
1039 # NOTE: NFS syscall can't be interrupted, so alarm does
1040 # not work to provide timeouts.
1041 # from 'man nfs': "Only SIGKILL can interrupt a pending NFS operation"
1042 # So fork() before using Filesys::Df
1043 sub df {
1044 my ($path, $timeout) = @_;
1045
1046 my $df = sub { return Filesys::Df::df($path, 1) };
1047
1048 my $res = eval { run_fork_with_timeout($timeout, $df) } // {};
1049 warn $@ if $@;
1050
1051 # untaint, but be flexible: PB usage can result in scientific notation
1052 my ($blocks, $used, $bavail) = map { defined($_) ? (/^([\d\.e\-+]+)$/) : 0 }
1053 $res->@{qw(blocks used bavail)};
1054
1055 return {
1056 total => $blocks,
1057 used => $used,
1058 avail => $bavail,
1059 };
1060 }
1061
1062 sub du {
1063 my ($path, $timeout) = @_;
1064
1065 my $size;
1066
1067 $timeout //= 10;
1068
1069 my $parser = sub {
1070 my $line = shift;
1071
1072 if ($line =~ m/^(\d+)\s+total$/) {
1073 $size = $1;
1074 }
1075 };
1076
1077 run_command(['du', '-scb', $path], outfunc => $parser, timeout => $timeout);
1078
1079 return $size;
1080 }
1081
1082 # UPID helper
1083 # We use this to uniquely identify a process.
1084 # An 'Unique Process ID' has the following format:
1085 # "UPID:$node:$pid:$pstart:$startime:$dtype:$id:$user"
1086
1087 sub upid_encode {
1088 my $d = shift;
1089
1090 # Note: pstart can be > 32bit if uptime > 497 days, so this can result in
1091 # more that 8 characters for pstart
1092 return sprintf("UPID:%s:%08X:%08X:%08X:%s:%s:%s:", $d->{node}, $d->{pid},
1093 $d->{pstart}, $d->{starttime}, $d->{type}, $d->{id},
1094 $d->{user});
1095 }
1096
1097 sub upid_decode {
1098 my ($upid, $noerr) = @_;
1099
1100 my $res;
1101 my $filename;
1102
1103 # "UPID:$node:$pid:$pstart:$startime:$dtype:$id:$user"
1104 # Note: allow up to 9 characters for pstart (work until 20 years uptime)
1105 if ($upid =~ m/^UPID:([a-zA-Z0-9]([a-zA-Z0-9\-]*[a-zA-Z0-9])?):([0-9A-Fa-f]{8}):([0-9A-Fa-f]{8,9}):([0-9A-Fa-f]{8}):([^:\s]+):([^:\s]*):([^:\s]+):$/) {
1106 $res->{node} = $1;
1107 $res->{pid} = hex($3);
1108 $res->{pstart} = hex($4);
1109 $res->{starttime} = hex($5);
1110 $res->{type} = $6;
1111 $res->{id} = $7;
1112 $res->{user} = $8;
1113
1114 my $subdir = substr($5, 7, 8);
1115 $filename = "$pvetaskdir/$subdir/$upid";
1116
1117 } else {
1118 return undef if $noerr;
1119 die "unable to parse worker upid '$upid'\n";
1120 }
1121
1122 return wantarray ? ($res, $filename) : $res;
1123 }
1124
1125 sub upid_open {
1126 my ($upid) = @_;
1127
1128 my ($task, $filename) = upid_decode($upid);
1129
1130 my $dirname = dirname($filename);
1131 make_path($dirname);
1132
1133 my $wwwid = getpwnam('www-data') ||
1134 die "getpwnam failed";
1135
1136 my $perm = 0640;
1137
1138 my $outfh = IO::File->new ($filename, O_WRONLY|O_CREAT|O_EXCL, $perm) ||
1139 die "unable to create output file '$filename' - $!\n";
1140 chown $wwwid, -1, $outfh;
1141
1142 return $outfh;
1143 };
1144
1145 sub upid_read_status {
1146 my ($upid) = @_;
1147
1148 my ($task, $filename) = upid_decode($upid);
1149 my $fh = IO::File->new($filename, "r");
1150 return "unable to open file - $!" if !$fh;
1151 my $maxlen = 4096;
1152 sysseek($fh, -$maxlen, 2);
1153 my $readbuf = '';
1154 my $br = sysread($fh, $readbuf, $maxlen);
1155 close($fh);
1156 if ($br) {
1157 return "unable to extract last line"
1158 if $readbuf !~ m/\n?(.+)$/;
1159 my $line = $1;
1160 if ($line =~ m/^TASK OK$/) {
1161 return 'OK';
1162 } elsif ($line =~ m/^TASK ERROR: (.+)$/) {
1163 return $1;
1164 } elsif ($line =~ m/^TASK (WARNINGS: \d+)$/) {
1165 return $1;
1166 } else {
1167 return "unexpected status";
1168 }
1169 }
1170 return "unable to read tail (got $br bytes)";
1171 }
1172
1173 # Check if the status returned by upid_read_status is an error status.
1174 # If the status could not be parsed it's also treated as an error.
1175 sub upid_status_is_error {
1176 my ($status) = @_;
1177
1178 return !($status eq 'OK' || $status =~ m/^WARNINGS: \d+$/);
1179 }
1180
1181 # takes the parsed status and returns the type, either ok, warning, error or unknown
1182 sub upid_normalize_status_type {
1183 my ($status) = @_;
1184
1185 if (!$status) {
1186 return 'unknown';
1187 } elsif ($status eq 'OK') {
1188 return 'ok';
1189 } elsif ($status =~ m/^WARNINGS: \d+$/) {
1190 return 'warning';
1191 } elsif ($status eq 'unexpected status') {
1192 return 'unknown';
1193 } else {
1194 return 'error';
1195 }
1196 }
1197
1198 # useful functions to store comments in config files
1199 sub encode_text {
1200 my ($text) = @_;
1201
1202 # all control and hi-bit characters, and ':'
1203 my $unsafe = "^\x20-\x39\x3b-\x7e";
1204 return uri_escape(Encode::encode("utf8", $text), $unsafe);
1205 }
1206
1207 sub decode_text {
1208 my ($data) = @_;
1209
1210 return Encode::decode("utf8", uri_unescape($data));
1211 }
1212
1213 # depreciated - do not use!
1214 # we now decode all parameters by default
1215 sub decode_utf8_parameters {
1216 my ($param) = @_;
1217
1218 foreach my $p (qw(comment description firstname lastname)) {
1219 $param->{$p} = decode('utf8', $param->{$p}) if $param->{$p};
1220 }
1221
1222 return $param;
1223 }
1224
1225 sub random_ether_addr {
1226 my ($prefix) = @_;
1227
1228 my ($seconds, $microseconds) = gettimeofday;
1229
1230 my $rand = Digest::SHA::sha1($$, rand(), $seconds, $microseconds);
1231
1232 # clear multicast, set local id
1233 vec($rand, 0, 8) = (vec($rand, 0, 8) & 0xfe) | 2;
1234
1235 my $addr = sprintf("%02X:%02X:%02X:%02X:%02X:%02X", unpack("C6", $rand));
1236 if (defined($prefix)) {
1237 $addr = uc($prefix) . substr($addr, length($prefix));
1238 }
1239 return $addr;
1240 }
1241
1242 sub shellquote {
1243 my $str = shift;
1244
1245 return String::ShellQuote::shell_quote($str);
1246 }
1247
1248 sub cmd2string {
1249 my ($cmd) = @_;
1250
1251 die "no arguments" if !$cmd;
1252
1253 return $cmd if !ref($cmd);
1254
1255 my @qa = ();
1256 foreach my $arg (@$cmd) { push @qa, shellquote($arg); }
1257
1258 return join (' ', @qa);
1259 }
1260
1261 # split an shell argument string into an array,
1262 sub split_args {
1263 my ($str) = @_;
1264
1265 return $str ? [ Text::ParseWords::shellwords($str) ] : [];
1266 }
1267
1268 sub dump_logfile {
1269 my ($filename, $start, $limit, $filter) = @_;
1270
1271 my $lines = [];
1272 my $count = 0;
1273
1274 my $fh = IO::File->new($filename, "r");
1275 if (!$fh) {
1276 $count++;
1277 push @$lines, { n => $count, t => "unable to open file - $!"};
1278 return ($count, $lines);
1279 }
1280
1281 $start = 0 if !$start;
1282 $limit = 50 if !$limit;
1283
1284 my $line;
1285
1286 if ($filter) {
1287 # duplicate code, so that we do not slow down normal path
1288 while (defined($line = <$fh>)) {
1289 next if $line !~ m/$filter/;
1290 next if $count++ < $start;
1291 next if $limit <= 0;
1292 chomp $line;
1293 push @$lines, { n => $count, t => $line};
1294 $limit--;
1295 }
1296 } else {
1297 while (defined($line = <$fh>)) {
1298 next if $count++ < $start;
1299 next if $limit <= 0;
1300 chomp $line;
1301 push @$lines, { n => $count, t => $line};
1302 $limit--;
1303 }
1304 }
1305
1306 close($fh);
1307
1308 # HACK: ExtJS store.guaranteeRange() does not like empty array
1309 # so we add a line
1310 if (!$count) {
1311 $count++;
1312 push @$lines, { n => $count, t => "no content"};
1313 }
1314
1315 return ($count, $lines);
1316 }
1317
1318 sub dump_journal {
1319 my ($start, $limit, $since, $until, $service) = @_;
1320
1321 my $lines = [];
1322 my $count = 0;
1323
1324 $start = 0 if !$start;
1325 $limit = 50 if !$limit;
1326
1327 my $parser = sub {
1328 my $line = shift;
1329
1330 return if $count++ < $start;
1331 return if $limit <= 0;
1332 push @$lines, { n => int($count), t => $line};
1333 $limit--;
1334 };
1335
1336 my $cmd = ['journalctl', '-o', 'short', '--no-pager'];
1337
1338 push @$cmd, '--unit', $service if $service;
1339 push @$cmd, '--since', $since if $since;
1340 push @$cmd, '--until', $until if $until;
1341 run_command($cmd, outfunc => $parser);
1342
1343 # HACK: ExtJS store.guaranteeRange() does not like empty array
1344 # so we add a line
1345 if (!$count) {
1346 $count++;
1347 push @$lines, { n => $count, t => "no content"};
1348 }
1349
1350 return ($count, $lines);
1351 }
1352
1353 sub dir_glob_regex {
1354 my ($dir, $regex) = @_;
1355
1356 my $dh = IO::Dir->new ($dir);
1357 return wantarray ? () : undef if !$dh;
1358
1359 while (defined(my $tmp = $dh->read)) {
1360 if (my @res = $tmp =~ m/^($regex)$/) {
1361 $dh->close;
1362 return wantarray ? @res : $tmp;
1363 }
1364 }
1365 $dh->close;
1366
1367 return wantarray ? () : undef;
1368 }
1369
1370 sub dir_glob_foreach {
1371 my ($dir, $regex, $func) = @_;
1372
1373 my $dh = IO::Dir->new ($dir);
1374 if (defined $dh) {
1375 while (defined(my $tmp = $dh->read)) {
1376 if (my @res = $tmp =~ m/^($regex)$/) {
1377 &$func (@res);
1378 }
1379 }
1380 }
1381 }
1382
1383 sub assert_if_modified {
1384 my ($digest1, $digest2) = @_;
1385
1386 if ($digest1 && $digest2 && ($digest1 ne $digest2)) {
1387 die "detected modified configuration - file changed by other user? Try again.\n";
1388 }
1389 }
1390
1391 # Digest for short strings
1392 # like FNV32a, but we only return 31 bits (positive numbers)
1393 sub fnv31a {
1394 my ($string) = @_;
1395
1396 my $hval = 0x811c9dc5;
1397
1398 foreach my $c (unpack('C*', $string)) {
1399 $hval ^= $c;
1400 $hval += (
1401 (($hval << 1) ) +
1402 (($hval << 4) ) +
1403 (($hval << 7) ) +
1404 (($hval << 8) ) +
1405 (($hval << 24) ) );
1406 $hval = $hval & 0xffffffff;
1407 }
1408 return $hval & 0x7fffffff;
1409 }
1410
1411 sub fnv31a_hex { return sprintf("%X", fnv31a(@_)); }
1412
1413 sub unpack_sockaddr_in46 {
1414 my ($sin) = @_;
1415 my $family = Socket::sockaddr_family($sin);
1416 my ($port, $host) = ($family == AF_INET6 ? Socket::unpack_sockaddr_in6($sin)
1417 : Socket::unpack_sockaddr_in($sin));
1418 return ($family, $port, $host);
1419 }
1420
1421 sub getaddrinfo_all {
1422 my ($hostname, @opts) = @_;
1423 my %hints = (
1424 flags => AI_V4MAPPED | AI_ALL,
1425 @opts,
1426 );
1427 my ($err, @res) = Socket::getaddrinfo($hostname, '0', \%hints);
1428 die "failed to get address info for: $hostname: $err\n" if $err;
1429 return @res;
1430 }
1431
1432 sub get_host_address_family {
1433 my ($hostname, $socktype) = @_;
1434 my @res = getaddrinfo_all($hostname, socktype => $socktype);
1435 return $res[0]->{family};
1436 }
1437
1438 # get the fully qualified domain name of a host
1439 # same logic as hostname(1): The FQDN is the name getaddrinfo(3) returns,
1440 # given a nodename as a parameter
1441 sub get_fqdn {
1442 my ($nodename) = @_;
1443
1444 my $hints = {
1445 flags => AI_CANONNAME,
1446 socktype => SOCK_DGRAM
1447 };
1448
1449 my ($err, @addrs) = Socket::getaddrinfo($nodename, undef, $hints);
1450
1451 die "getaddrinfo: $err" if $err;
1452
1453 return $addrs[0]->{canonname};
1454 }
1455
1456 # Parses any sane kind of host, or host+port pair:
1457 # The port is always optional and thus may be undef.
1458 sub parse_host_and_port {
1459 my ($address) = @_;
1460 if ($address =~ /^($IPV4RE|[[:alnum:]\-.]+)(?::(\d+))?$/ || # ipv4 or host with optional ':port'
1461 $address =~ /^\[($IPV6RE|$IPV4RE|[[:alnum:]\-.]+)\](?::(\d+))?$/ || # anything in brackets with optional ':port'
1462 $address =~ /^($IPV6RE)(?:\.(\d+))?$/) # ipv6 with optional port separated by dot
1463 {
1464 return ($1, $2, 1); # end with 1 to support simple if(parse...) tests
1465 }
1466 return; # nothing
1467 }
1468
1469 sub setresuid($$$) {
1470 my ($ruid, $euid, $suid) = @_;
1471 return 0 == syscall(PVE::Syscall::setresuid, $ruid, $euid, $suid);
1472 }
1473
1474 sub unshare($) {
1475 my ($flags) = @_;
1476 return 0 == syscall(PVE::Syscall::unshare, $flags);
1477 }
1478
1479 sub setns($$) {
1480 my ($fileno, $nstype) = @_;
1481 return 0 == syscall(PVE::Syscall::setns, $fileno, $nstype);
1482 }
1483
1484 sub syncfs($) {
1485 my ($fileno) = @_;
1486 return 0 == syscall(PVE::Syscall::syncfs, $fileno);
1487 }
1488
1489 sub fsync($) {
1490 my ($fileno) = @_;
1491 return 0 == syscall(PVE::Syscall::fsync, $fileno);
1492 }
1493
1494 sub renameat2($$$$$) {
1495 my ($olddirfd, $oldpath, $newdirfd, $newpath, $flags) = @_;
1496 return 0 == syscall(PVE::Syscall::renameat2, $olddirfd, $oldpath, $newdirfd, $newpath, $flags);
1497 }
1498
1499 sub sync_mountpoint {
1500 my ($path) = @_;
1501 sysopen my $fd, $path, O_RDONLY|O_CLOEXEC or die "failed to open $path: $!\n";
1502 my $syncfs_err;
1503 if (!syncfs(fileno($fd))) {
1504 $syncfs_err = "$!";
1505 }
1506 close($fd);
1507 die "syncfs '$path' failed - $syncfs_err\n" if defined $syncfs_err;
1508 }
1509
1510 my sub check_mail_addr {
1511 my ($addr) = @_;
1512 die "'$addr' does not look like a valid email address or username\n"
1513 if $addr !~ /^$EMAIL_RE$/ && $addr !~ /^$EMAIL_USER_RE$/;
1514 }
1515
1516 # support sending multi-part mail messages with a text and or a HTML part
1517 # mailto may be a single email string or an array of receivers
1518 sub sendmail {
1519 my ($mailto, $subject, $text, $html, $mailfrom, $author) = @_;
1520
1521 $mailto = [ $mailto ] if !ref($mailto);
1522
1523 check_mail_addr($_) for $mailto->@*;
1524 my $to_quoted = [ map { shellquote($_) } $mailto->@* ];
1525
1526 $mailfrom = $mailfrom || "root";
1527 check_mail_addr($mailfrom);
1528 my $from_quoted = shellquote($mailfrom);
1529
1530 $author = $author // 'Proxmox VE';
1531
1532 open (my $mail, "|-", "sendmail", "-B", "8BITMIME", "-f", $from_quoted, "--", $to_quoted->@*)
1533 or die "unable to open 'sendmail' - $!";
1534
1535 my $is_multipart = $text && $html;
1536 my $boundary = "----_=_NextPart_001_" . int(time()) . $$; # multipart spec, see rfc 1521
1537
1538 $subject = Encode::encode('MIME-Header', $subject) if $subject =~ /[^[:ascii:]]/;
1539
1540 print $mail "MIME-Version: 1.0\n" if $subject =~ /[^[:ascii:]]/ || $is_multipart;
1541
1542 print $mail "From: $author <$mailfrom>\n";
1543 print $mail "To: " . join(', ', @$mailto) ."\n";
1544 print $mail "Date: " . time2str('%a, %d %b %Y %H:%M:%S %z', time()) . "\n";
1545 print $mail "Subject: $subject\n";
1546
1547 if ($is_multipart) {
1548 print $mail "Content-Type: multipart/alternative;\n";
1549 print $mail "\tboundary=\"$boundary\"\n";
1550 print $mail "\n";
1551 print $mail "This is a multi-part message in MIME format.\n\n";
1552 print $mail "--$boundary\n";
1553 }
1554
1555 if (defined($text)) {
1556 print $mail "Content-Type: text/plain;\n";
1557 print $mail "\tcharset=\"UTF-8\"\n";
1558 print $mail "Content-Transfer-Encoding: 8bit\n";
1559 print $mail "\n";
1560
1561 # avoid 'remove extra line breaks' issue (MS Outlook)
1562 my $fill = ' ';
1563 $text =~ s/^/$fill/gm;
1564
1565 print $mail $text;
1566
1567 print $mail "\n--$boundary\n" if $is_multipart;
1568 }
1569
1570 if (defined($html)) {
1571 print $mail "Content-Type: text/html;\n";
1572 print $mail "\tcharset=\"UTF-8\"\n";
1573 print $mail "Content-Transfer-Encoding: 8bit\n";
1574 print $mail "\n";
1575
1576 print $mail $html;
1577
1578 print $mail "\n--$boundary--\n" if $is_multipart;
1579 }
1580
1581 close($mail);
1582 }
1583
1584 # creates a temporary file that does not shows up on the file system hierarchy.
1585 #
1586 # Uses O_TMPFILE if available, which makes it just an anon inode that never shows up in the FS.
1587 # If O_TMPFILE is not available, which unlikely nowadays (added in 3.11 kernel and all FS relevant
1588 # for us support it) back to open-create + immediate unlink while still holding the file handle.
1589 #
1590 # TODO: to avoid FS dependent features we could (transparently) switch to memfd_create as backend
1591 sub tempfile {
1592 my ($perm, %opts) = @_;
1593
1594 # default permissions are stricter than with file_set_contents
1595 $perm = 0600 if !defined($perm);
1596
1597 my $dir = $opts{dir};
1598 if (!$dir) {
1599 if (-d "/run/user/$<") {
1600 $dir = "/run/user/$<";
1601 } elsif ($< == 0) {
1602 $dir = "/run";
1603 } else {
1604 $dir = "/tmp";
1605 }
1606 }
1607 my $mode = $opts{mode} // O_RDWR;
1608 $mode |= O_EXCL if !$opts{allow_links};
1609
1610 my $fh = IO::File->new($dir, $mode | O_TMPFILE, $perm);
1611 if (!$fh && $! == EOPNOTSUPP) {
1612 $dir = '/tmp' if !defined($opts{dir});
1613 $dir .= "/.tmpfile.$$";
1614 $fh = IO::File->new($dir, $mode | O_CREAT | O_EXCL, $perm);
1615 unlink($dir) if $fh;
1616 }
1617 die "failed to create tempfile: $!\n" if !$fh;
1618 return $fh;
1619 }
1620
1621 # create an (ideally) anon file with the $data as content and return its FD-path and FH
1622 sub tempfile_contents {
1623 my ($data, $perm, %opts) = @_;
1624
1625 my $fh = tempfile($perm, %opts);
1626 eval {
1627 die "unable to write to tempfile: $!\n" if !print {$fh} $data;
1628 die "unable to flush to tempfile: $!\n" if !defined($fh->flush());
1629 };
1630 if (my $err = $@) {
1631 close $fh;
1632 die $err;
1633 }
1634
1635 return ("/proc/$$/fd/".$fh->fileno, $fh);
1636 }
1637
1638 sub validate_ssh_public_keys {
1639 my ($raw) = @_;
1640 my @lines = split(/\n/, $raw);
1641
1642 foreach my $line (@lines) {
1643 next if $line =~ m/^\s*$/;
1644 eval {
1645 my ($filename, $handle) = tempfile_contents($line);
1646 run_command(["ssh-keygen", "-l", "-f", $filename],
1647 outfunc => sub {}, errfunc => sub {});
1648 };
1649 die "SSH public key validation error\n" if $@;
1650 }
1651 }
1652
1653 sub openat($$$;$) {
1654 my ($dirfd, $pathname, $flags, $mode) = @_;
1655 my $fd = syscall(PVE::Syscall::openat, $dirfd, $pathname, $flags, $mode//0);
1656 return undef if $fd < 0;
1657 # sysopen() doesn't deal with numeric file descriptors apparently
1658 # so we need to convert to a mode string for IO::Handle->new_from_fd
1659 my $flagstr = ($flags & O_RDWR) ? 'rw' : ($flags & O_WRONLY) ? 'w' : 'r';
1660 my $handle = IO::Handle->new_from_fd($fd, $flagstr);
1661 return $handle if $handle;
1662 my $err = $!; # save error before closing the raw fd
1663 syscall(PVE::Syscall::close, $fd); # close
1664 $! = $err;
1665 return undef;
1666 }
1667
1668 sub mkdirat($$$) {
1669 my ($dirfd, $name, $mode) = @_;
1670 return syscall(PVE::Syscall::mkdirat, $dirfd, $name, $mode) == 0;
1671 }
1672
1673 sub fchownat($$$$$) {
1674 my ($dirfd, $pathname, $owner, $group, $flags) = @_;
1675 return syscall(PVE::Syscall::fchownat, $dirfd, $pathname, $owner, $group, $flags) == 0;
1676 }
1677
1678 my $salt_starter = time();
1679
1680 sub encrypt_pw {
1681 my ($pw) = @_;
1682
1683 $salt_starter++;
1684 my $salt = substr(Digest::SHA::sha1_base64(time() + $salt_starter + $$), 0, 8);
1685
1686 # crypt does not want '+' in salt (see 'man crypt')
1687 $salt =~ s/\+/X/g;
1688
1689 return crypt(encode("utf8", $pw), "\$5\$$salt\$");
1690 }
1691
1692 # intended usage: convert_size($val, "kb" => "gb")
1693 # we round up to the next integer by default
1694 # E.g. `convert_size(1023, "b" => "kb")` returns 1
1695 # use $no_round_up to switch this off, above example would then return 0
1696 # this is also true for converting down e.g. 0.0005 gb to mb returns 1
1697 # (0 if $no_round_up is true)
1698 # allowed formats for value:
1699 # 1234
1700 # 1234.
1701 # 1234.1234
1702 # .1234
1703 sub convert_size {
1704 my ($value, $from, $to, $no_round_up) = @_;
1705
1706 my $units = {
1707 b => 0,
1708 kb => 1,
1709 mb => 2,
1710 gb => 3,
1711 tb => 4,
1712 pb => 5,
1713 };
1714
1715 die "no value given"
1716 if !defined($value) || $value eq "";
1717
1718 $from = lc($from // ''); $to = lc($to // '');
1719 die "unknown 'from' and/or 'to' units ($from => $to)"
1720 if !defined($units->{$from}) || !defined($units->{$to});
1721
1722 die "value '$value' is not a valid, positive number"
1723 if $value !~ m/^(?:[0-9]+\.?[0-9]*|[0-9]*\.[0-9]+)$/;
1724
1725 my $shift_amount = ($units->{$from} - $units->{$to}) * 10;
1726
1727 $value *= 2**$shift_amount;
1728 $value++ if !$no_round_up && ($value - int($value)) > 0.0;
1729
1730 return int($value);
1731 }
1732
1733 # uninterruptible readline
1734 # retries on EINTR
1735 sub readline_nointr {
1736 my ($fh) = @_;
1737 my $line;
1738 while (1) {
1739 $line = <$fh>;
1740 last if defined($line) || ($! != EINTR);
1741 }
1742 return $line;
1743 }
1744
1745 my $host_arch;
1746 sub get_host_arch {
1747 $host_arch = (POSIX::uname())[4] if !$host_arch;
1748 return $host_arch;
1749 }
1750
1751 # Devices are: [ (12 bits minor) (12 bits major) (8 bits minor) ]
1752 sub dev_t_major($) {
1753 my ($dev_t) = @_;
1754 return (int($dev_t) & 0xfff00) >> 8;
1755 }
1756
1757 sub dev_t_minor($) {
1758 my ($dev_t) = @_;
1759 $dev_t = int($dev_t);
1760 return (($dev_t >> 12) & 0xfff00) | ($dev_t & 0xff);
1761 }
1762
1763 # Given an array of array refs [ \[a b c], \[a b b], \[e b a] ]
1764 # Returns the intersection of elements as a single array [a b]
1765 sub array_intersect {
1766 my ($arrays) = @_;
1767
1768 if (!ref($arrays->[0])) {
1769 $arrays = [ grep { ref($_) eq 'ARRAY' } @_ ];
1770 }
1771
1772 return [] if scalar(@$arrays) == 0;
1773 return $arrays->[0] if scalar(@$arrays) == 1;
1774
1775 my $array_unique = sub {
1776 my %seen = ();
1777 return grep { ! $seen{ $_ }++ } @_;
1778 };
1779
1780 # base idea is to get all unique members from the first array, then
1781 # check the common elements with the next (uniquely made) one, only keep
1782 # those. Repeat for every array and at the end we only have those left
1783 # which exist in all arrays
1784 my $return_arr = [ $array_unique->(@{$arrays->[0]}) ];
1785 for my $i (1 .. $#$arrays) {
1786 my %count = ();
1787 # $return_arr is already unique, explicit at before the loop, implicit below.
1788 foreach my $element (@$return_arr, $array_unique->(@{$arrays->[$i]})) {
1789 $count{$element}++;
1790 }
1791 $return_arr = [];
1792 foreach my $element (keys %count) {
1793 push @$return_arr, $element if $count{$element} > 1;
1794 }
1795 last if scalar(@$return_arr) == 0; # empty intersection, early exit
1796 }
1797
1798 return $return_arr;
1799 }
1800
1801 sub open_tree($$$) {
1802 my ($dfd, $pathname, $flags) = @_;
1803 return PVE::Syscall::file_handle_result(syscall(
1804 &PVE::Syscall::open_tree,
1805 $dfd,
1806 $pathname,
1807 $flags,
1808 ));
1809 }
1810
1811 sub move_mount($$$$$) {
1812 my ($from_dirfd, $from_pathname, $to_dirfd, $to_pathname, $flags) = @_;
1813 return 0 == syscall(
1814 &PVE::Syscall::move_mount,
1815 $from_dirfd,
1816 $from_pathname,
1817 $to_dirfd,
1818 $to_pathname,
1819 $flags,
1820 );
1821 }
1822
1823 sub fsopen($$) {
1824 my ($fsname, $flags) = @_;
1825 return PVE::Syscall::file_handle_result(syscall(&PVE::Syscall::fsopen, $fsname, $flags));
1826 }
1827
1828 sub fsmount($$$) {
1829 my ($fd, $flags, $mount_attrs) = @_;
1830 return PVE::Syscall::file_handle_result(syscall(
1831 &PVE::Syscall::fsmount,
1832 $fd,
1833 $flags,
1834 $mount_attrs,
1835 ));
1836 }
1837
1838 sub fspick($$$) {
1839 my ($dirfd, $pathname, $flags) = @_;
1840 return PVE::Syscall::file_handle_result(syscall(
1841 &PVE::Syscall::fspick,
1842 $dirfd,
1843 $pathname,
1844 $flags,
1845 ));
1846 }
1847
1848 sub fsconfig($$$$$) {
1849 my ($fd, $command, $key, $value, $aux) = @_;
1850 return 0 == syscall(&PVE::Syscall::fsconfig, $fd, $command, $key, $value, $aux);
1851 }
1852
1853 # "raw" mount, old api, not for generic use (as it does not invoke any helpers).
1854 # use for lower level stuff such as bind/remount/... or simple tmpfs mounts
1855 sub mount($$$$$) {
1856 my ($source, $target, $filesystemtype, $mountflags, $data) = @_;
1857 return 0 == syscall(
1858 &PVE::Syscall::mount,
1859 $source,
1860 $target,
1861 $filesystemtype,
1862 $mountflags,
1863 $data,
1864 );
1865 }
1866
1867 # size is optional and defaults to 256, note that xattr limits are FS specific and that xattrs can
1868 # get arbitrary long. pass `0` for $size in array context to get the actual size of a value
1869 sub getxattr($$;$) {
1870 my ($path_or_handle, $name, $size) = @_;
1871 $size //= 256;
1872 my $buf = pack("x${size}");
1873
1874 my $xattr_size = -1; # the actual size of the xattr, can be zero
1875 if (defined(my $fd = fileno($path_or_handle))) {
1876 $xattr_size = syscall(&PVE::Syscall::fgetxattr, $fd, $name, $buf, $size);
1877 } else {
1878 $xattr_size = syscall(&PVE::Syscall::getxattr, $path_or_handle, $name, $buf, $size);
1879 }
1880 if ($xattr_size < 0) {
1881 return undef;
1882 }
1883 return wantarray ? ($buf, $xattr_size) : $buf;
1884 }
1885
1886 # NOTE: can take either a path or an open file handle, i.e., its multiplexing setxattr and fsetxattr
1887 sub setxattr($$$;$) {
1888 my ($path_or_handle, $name, $value, $flags) = @_;
1889 my $size = length($value); # NOTE: seems to get correct length also for wide-characters in text..
1890
1891 if (defined(my $fd = fileno($path_or_handle))) {
1892 return 0 == syscall(&PVE::Syscall::fsetxattr, $fd, $name, $value, $size, $flags // 0);
1893 } else {
1894 return 0 == syscall(&PVE::Syscall::setxattr, $path_or_handle, $name, $value, $size, $flags // 0);
1895 }
1896 }
1897
1898 sub safe_compare {
1899 my ($left, $right, $cmp) = @_;
1900
1901 return 0 if !defined($left) && !defined($right);
1902 return -1 if !defined($left);
1903 return 1 if !defined($right);
1904 return $cmp->($left, $right);
1905 }
1906
1907
1908 # opts is a hash ref with the following known properties
1909 # allow_overwrite - if 1, overwriting existing files is allowed, use with care. Default to false
1910 # hash_required - if 1, at least one checksum has to be specified otherwise an error will be thrown
1911 # http_proxy
1912 # https_proxy
1913 # verify_certificates - if 0 (false) we tell wget to ignore untrusted TLS certs. Default to true
1914 # md5sum|sha(1|224|256|384|512)sum - the respective expected checksum string
1915 sub download_file_from_url {
1916 my ($dest, $url, $opts) = @_;
1917
1918 my ($checksum_algorithm, $checksum_expected);
1919 for ('sha512', 'sha384', 'sha256', 'sha224', 'sha1', 'md5') {
1920 if (defined($opts->{"${_}sum"})) {
1921 $checksum_algorithm = $_;
1922 $checksum_expected = $opts->{"${_}sum"};
1923 last;
1924 }
1925 }
1926 die "checksum required but not specified\n" if ($opts->{hash_required} && !$checksum_algorithm);
1927
1928 print "downloading $url to $dest\n";
1929
1930 if (-f $dest) {
1931 if ($checksum_algorithm) {
1932 print "calculating checksum of existing file...";
1933 my $checksum_got = get_file_hash($checksum_algorithm, $dest);
1934
1935 if (lc($checksum_got) eq lc($checksum_expected)) {
1936 print "OK, got correct file already, no need to download\n";
1937 return;
1938 } elsif ($opts->{allow_overwrite}) {
1939 print "checksum mismatch: got '$checksum_got' != expect '$checksum_expected', re-download\n";
1940 } else {
1941 print "\n"; # the front end expects the error to reside at the last line without any noise
1942 die "checksum mismatch: got '$checksum_got' != expect '$checksum_expected', aborting\n";
1943 }
1944 } elsif (!$opts->{allow_overwrite}) {
1945 die "refusing to override existing file '$dest'\n";
1946 }
1947 }
1948
1949 my $tmpdest = "$dest.tmp.$$";
1950 eval {
1951 local $SIG{INT} = sub {
1952 unlink $tmpdest or warn "could not cleanup temporary file: $!";
1953 die "got interrupted by signal\n";
1954 };
1955
1956 { # limit the scope of the ENV change
1957 local %ENV;
1958 if ($opts->{http_proxy}) {
1959 $ENV{http_proxy} = $opts->{http_proxy};
1960 }
1961 if ($opts->{https_proxy}) {
1962 $ENV{https_proxy} = $opts->{https_proxy};
1963 }
1964
1965 my $cmd = ['wget', '--progress=dot:giga', '-O', $tmpdest, $url];
1966
1967 if (!($opts->{verify_certificates} // 1)) { # default to true
1968 push @$cmd, '--no-check-certificate';
1969 }
1970
1971 run_command($cmd, errmsg => "download failed");
1972 }
1973
1974 if ($checksum_algorithm) {
1975 print "calculating checksum...";
1976
1977 my $checksum_got = get_file_hash($checksum_algorithm, $tmpdest);
1978
1979 if (lc($checksum_got) eq lc($checksum_expected)) {
1980 print "OK, checksum verified\n";
1981 } else {
1982 print "\n"; # the front end expects the error to reside at the last line without any noise
1983 die "checksum mismatch: got '$checksum_got' != expect '$checksum_expected'\n";
1984 }
1985 }
1986
1987 rename($tmpdest, $dest) or die "unable to rename temporary file: $!\n";
1988 };
1989 if (my $err = $@) {
1990 unlink $tmpdest or warn "could not cleanup temporary file: $!";
1991 die $err;
1992 }
1993
1994 print "download of '$url' to '$dest' finished\n";
1995 }
1996
1997 sub get_file_hash {
1998 my ($algorithm, $filename) = @_;
1999
2000 my $algorithm_map = {
2001 'md5' => sub { Digest::MD5->new },
2002 'sha1' => sub { Digest::SHA->new(1) },
2003 'sha224' => sub { Digest::SHA->new(224) },
2004 'sha256' => sub { Digest::SHA->new(256) },
2005 'sha384' => sub { Digest::SHA->new(384) },
2006 'sha512' => sub { Digest::SHA->new(512) },
2007 };
2008
2009 my $digester = $algorithm_map->{$algorithm}->() or die "unknown algorithm '$algorithm'\n";
2010
2011 open(my $fh, '<', $filename) or die "unable to open '$filename': $!\n";
2012 binmode($fh);
2013
2014 my $digest = $digester->addfile($fh)->hexdigest;
2015
2016 return lc($digest);
2017 }
2018
2019 1;