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1 | package PVE::Tools; | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | use POSIX qw(EINTR EEXIST EOPNOTSUPP); | |
6 | use IO::Socket::IP; | |
7 | use Socket qw(AF_INET AF_INET6 AI_ALL AI_V4MAPPED AI_CANONNAME SOCK_DGRAM | |
8 | IPPROTO_TCP); | |
9 | use IO::Select; | |
10 | use File::Basename; | |
11 | use File::Path qw(make_path); | |
12 | use Filesys::Df (); # don't overwrite our df() | |
13 | use IO::Pipe; | |
14 | use IO::File; | |
15 | use IO::Dir; | |
16 | use IO::Handle; | |
17 | use IPC::Open3; | |
18 | use Fcntl qw(:DEFAULT :flock); | |
19 | use base 'Exporter'; | |
20 | use URI::Escape; | |
21 | use Encode; | |
22 | use Digest::SHA; | |
23 | use JSON; | |
24 | use Text::ParseWords; | |
25 | use String::ShellQuote; | |
26 | use Time::HiRes qw(usleep gettimeofday tv_interval alarm); | |
27 | use Scalar::Util 'weaken'; | |
28 | use Date::Format qw(time2str); | |
29 | ||
30 | use PVE::Syscall; | |
31 | ||
32 | # avoid warning when parsing long hex values with hex() | |
33 | no warnings 'portable'; # Support for 64-bit ints required | |
34 | ||
35 | our @EXPORT_OK = qw( | |
36 | $IPV6RE | |
37 | $IPV4RE | |
38 | lock_file | |
39 | lock_file_full | |
40 | run_command | |
41 | file_set_contents | |
42 | file_get_contents | |
43 | file_read_firstline | |
44 | dir_glob_regex | |
45 | dir_glob_foreach | |
46 | split_list | |
47 | template_replace | |
48 | safe_print | |
49 | trim | |
50 | extract_param | |
51 | file_copy | |
52 | get_host_arch | |
53 | O_PATH | |
54 | O_TMPFILE | |
55 | AT_EMPTY_PATH | |
56 | AT_FDCWD | |
57 | CLONE_NEWNS | |
58 | CLONE_NEWUTS | |
59 | CLONE_NEWIPC | |
60 | CLONE_NEWUSER | |
61 | CLONE_NEWPID | |
62 | CLONE_NEWNET | |
63 | ); | |
64 | ||
65 | my $pvelogdir = "/var/log/pve"; | |
66 | my $pvetaskdir = "$pvelogdir/tasks"; | |
67 | ||
68 | mkdir $pvelogdir; | |
69 | mkdir $pvetaskdir; | |
70 | ||
71 | my $IPV4OCTET = "(?:25[0-5]|(?:2[0-4]|1[0-9]|[1-9])?[0-9])"; | |
72 | our $IPV4RE = "(?:(?:$IPV4OCTET\\.){3}$IPV4OCTET)"; | |
73 | my $IPV6H16 = "(?:[0-9a-fA-F]{1,4})"; | |
74 | my $IPV6LS32 = "(?:(?:$IPV4RE|$IPV6H16:$IPV6H16))"; | |
75 | ||
76 | our $IPV6RE = "(?:" . | |
77 | "(?:(?:" . "(?:$IPV6H16:){6})$IPV6LS32)|" . | |
78 | "(?:(?:" . "::(?:$IPV6H16:){5})$IPV6LS32)|" . | |
79 | "(?:(?:(?:" . "$IPV6H16)?::(?:$IPV6H16:){4})$IPV6LS32)|" . | |
80 | "(?:(?:(?:(?:$IPV6H16:){0,1}$IPV6H16)?::(?:$IPV6H16:){3})$IPV6LS32)|" . | |
81 | "(?:(?:(?:(?:$IPV6H16:){0,2}$IPV6H16)?::(?:$IPV6H16:){2})$IPV6LS32)|" . | |
82 | "(?:(?:(?:(?:$IPV6H16:){0,3}$IPV6H16)?::(?:$IPV6H16:){1})$IPV6LS32)|" . | |
83 | "(?:(?:(?:(?:$IPV6H16:){0,4}$IPV6H16)?::" . ")$IPV6LS32)|" . | |
84 | "(?:(?:(?:(?:$IPV6H16:){0,5}$IPV6H16)?::" . ")$IPV6H16)|" . | |
85 | "(?:(?:(?:(?:$IPV6H16:){0,6}$IPV6H16)?::" . ")))"; | |
86 | ||
87 | our $IPRE = "(?:$IPV4RE|$IPV6RE)"; | |
88 | ||
89 | use constant {CLONE_NEWNS => 0x00020000, | |
90 | CLONE_NEWUTS => 0x04000000, | |
91 | CLONE_NEWIPC => 0x08000000, | |
92 | CLONE_NEWUSER => 0x10000000, | |
93 | CLONE_NEWPID => 0x20000000, | |
94 | CLONE_NEWNET => 0x40000000}; | |
95 | ||
96 | use constant {O_PATH => 0x00200000, | |
97 | O_TMPFILE => 0x00410000}; # This includes O_DIRECTORY | |
98 | ||
99 | use constant {AT_EMPTY_PATH => 0x1000, | |
100 | AT_FDCWD => -100}; | |
101 | ||
102 | sub run_with_timeout { | |
103 | my ($timeout, $code, @param) = @_; | |
104 | ||
105 | die "got timeout\n" if $timeout <= 0; | |
106 | ||
107 | my $prev_alarm = alarm 0; # suspend outer alarm early | |
108 | ||
109 | my $sigcount = 0; | |
110 | ||
111 | my $res; | |
112 | ||
113 | eval { | |
114 | local $SIG{ALRM} = sub { $sigcount++; die "got timeout\n"; }; | |
115 | local $SIG{PIPE} = sub { $sigcount++; die "broken pipe\n" }; | |
116 | local $SIG{__DIE__}; # see SA bug 4631 | |
117 | ||
118 | alarm($timeout); | |
119 | ||
120 | eval { $res = &$code(@param); }; | |
121 | ||
122 | alarm(0); # avoid race conditions | |
123 | ||
124 | die $@ if $@; | |
125 | }; | |
126 | ||
127 | my $err = $@; | |
128 | ||
129 | alarm $prev_alarm; | |
130 | ||
131 | # this shouldn't happen anymore? | |
132 | die "unknown error" if $sigcount && !$err; # seems to happen sometimes | |
133 | ||
134 | die $err if $err; | |
135 | ||
136 | return $res; | |
137 | } | |
138 | ||
139 | # flock: we use one file handle per process, so lock file | |
140 | # can be nested multiple times and succeeds for the same process. | |
141 | # | |
142 | # Since this is the only way we lock now and we don't have the old | |
143 | # 'lock(); code(); unlock();' pattern anymore we do not actually need to | |
144 | # count how deep we're nesting. Therefore this hash now stores a weak reference | |
145 | # to a boolean telling us whether we already have a lock. | |
146 | ||
147 | my $lock_handles = {}; | |
148 | ||
149 | sub lock_file_full { | |
150 | my ($filename, $timeout, $shared, $code, @param) = @_; | |
151 | ||
152 | $timeout = 10 if !$timeout; | |
153 | ||
154 | my $mode = $shared ? LOCK_SH : LOCK_EX; | |
155 | ||
156 | my $lockhash = ($lock_handles->{$$} //= {}); | |
157 | ||
158 | # Returns a locked file handle. | |
159 | my $get_locked_file = sub { | |
160 | my $fh = IO::File->new(">>$filename") | |
161 | or die "can't open file - $!\n"; | |
162 | ||
163 | if (!flock($fh, $mode|LOCK_NB)) { | |
164 | print STDERR "trying to acquire lock...\n"; | |
165 | my $success; | |
166 | while(1) { | |
167 | $success = flock($fh, $mode); | |
168 | # try again on EINTR (see bug #273) | |
169 | if ($success || ($! != EINTR)) { | |
170 | last; | |
171 | } | |
172 | } | |
173 | if (!$success) { | |
174 | print STDERR " failed\n"; | |
175 | die "can't acquire lock '$filename' - $!\n"; | |
176 | } | |
177 | print STDERR " OK\n"; | |
178 | } | |
179 | ||
180 | return $fh; | |
181 | }; | |
182 | ||
183 | my $res; | |
184 | my $checkptr = $lockhash->{$filename}; | |
185 | my $check = 0; # This must not go out of scope before running the code. | |
186 | my $local_fh; # This must stay local | |
187 | if (!$checkptr || !$$checkptr) { | |
188 | # We cannot create a weak reference in a single atomic step, so we first | |
189 | # create a false-value, then create a reference to it, then weaken it, | |
190 | # and after successfully locking the file we change the boolean value. | |
191 | # | |
192 | # The reason for this is that if an outer SIGALRM throws an exception | |
193 | # between creating the reference and weakening it, a subsequent call to | |
194 | # lock_file_full() will see a leftover full reference to a valid | |
195 | # variable. This variable must be 0 in order for said call to attempt to | |
196 | # lock the file anew. | |
197 | # | |
198 | # An externally triggered exception elsewhere in the code will cause the | |
199 | # weak reference to become 'undef', and since the file handle is only | |
200 | # stored in the local scope in $local_fh, the file will be closed by | |
201 | # perl's cleanup routines as well. | |
202 | # | |
203 | # This still assumes that an IO::File handle can properly deal with such | |
204 | # exceptions thrown during its own destruction, but that's up to perls | |
205 | # guts now. | |
206 | $lockhash->{$filename} = \$check; | |
207 | weaken $lockhash->{$filename}; | |
208 | $local_fh = eval { run_with_timeout($timeout, $get_locked_file) }; | |
209 | if ($@) { | |
210 | $@ = "can't lock file '$filename' - $@"; | |
211 | return undef; | |
212 | } | |
213 | $check = 1; | |
214 | } | |
215 | $res = eval { &$code(@param); }; | |
216 | return undef if $@; | |
217 | return $res; | |
218 | } | |
219 | ||
220 | ||
221 | sub lock_file { | |
222 | my ($filename, $timeout, $code, @param) = @_; | |
223 | ||
224 | return lock_file_full($filename, $timeout, 0, $code, @param); | |
225 | } | |
226 | ||
227 | sub file_set_contents { | |
228 | my ($filename, $data, $perm) = @_; | |
229 | ||
230 | $perm = 0644 if !defined($perm); | |
231 | ||
232 | my $tmpname = "$filename.tmp.$$"; | |
233 | ||
234 | eval { | |
235 | my ($fh, $tries) = (undef, 0); | |
236 | while (!$fh && $tries++ < 3) { | |
237 | $fh = IO::File->new($tmpname, O_WRONLY|O_CREAT|O_EXCL, $perm); | |
238 | if (!$fh && $! == EEXIST) { | |
239 | unlink($tmpname) or die "unable to delete old temp file: $!\n"; | |
240 | } | |
241 | } | |
242 | die "unable to open file '$tmpname' - $!\n" if !$fh; | |
243 | die "unable to write '$tmpname' - $!\n" unless print $fh $data; | |
244 | die "closing file '$tmpname' failed - $!\n" unless close $fh; | |
245 | }; | |
246 | my $err = $@; | |
247 | ||
248 | if ($err) { | |
249 | unlink $tmpname; | |
250 | die $err; | |
251 | } | |
252 | ||
253 | if (!rename($tmpname, $filename)) { | |
254 | my $msg = "close (rename) atomic file '$filename' failed: $!\n"; | |
255 | unlink $tmpname; | |
256 | die $msg; | |
257 | } | |
258 | } | |
259 | ||
260 | sub file_get_contents { | |
261 | my ($filename, $max) = @_; | |
262 | ||
263 | my $fh = IO::File->new($filename, "r") || | |
264 | die "can't open '$filename' - $!\n"; | |
265 | ||
266 | my $content = safe_read_from($fh, $max, 0, $filename); | |
267 | ||
268 | close $fh; | |
269 | ||
270 | return $content; | |
271 | } | |
272 | ||
273 | sub file_copy { | |
274 | my ($filename, $dst, $max, $perm) = @_; | |
275 | ||
276 | file_set_contents ($dst, file_get_contents($filename, $max), $perm); | |
277 | } | |
278 | ||
279 | sub file_read_firstline { | |
280 | my ($filename) = @_; | |
281 | ||
282 | my $fh = IO::File->new ($filename, "r"); | |
283 | return undef if !$fh; | |
284 | my $res = <$fh>; | |
285 | chomp $res if $res; | |
286 | $fh->close; | |
287 | return $res; | |
288 | } | |
289 | ||
290 | sub safe_read_from { | |
291 | my ($fh, $max, $oneline, $filename) = @_; | |
292 | ||
293 | # pmxcfs file size limit | |
294 | $max = 512*1024 if !$max; | |
295 | ||
296 | my $subject = defined($filename) ? "file '$filename'" : 'input'; | |
297 | ||
298 | my $br = 0; | |
299 | my $input = ''; | |
300 | my $count; | |
301 | while ($count = sysread($fh, $input, 8192, $br)) { | |
302 | $br += $count; | |
303 | die "$subject too long - aborting\n" if $br > $max; | |
304 | if ($oneline && $input =~ m/^(.*)\n/) { | |
305 | $input = $1; | |
306 | last; | |
307 | } | |
308 | } | |
309 | die "unable to read $subject - $!\n" if !defined($count); | |
310 | ||
311 | return $input; | |
312 | } | |
313 | ||
314 | # The $cmd parameter can be: | |
315 | # -) a string | |
316 | # This is generally executed by passing it to the shell with the -c option. | |
317 | # However, it can be executed in one of two ways, depending on whether | |
318 | # there's a pipe involved: | |
319 | # *) with pipe: passed explicitly to bash -c, prefixed with: | |
320 | # set -o pipefail && | |
321 | # *) without a pipe: passed to perl's open3 which uses 'sh -c' | |
322 | # (Note that this may result in two different syntax requirements!) | |
323 | # FIXME? | |
324 | # -) an array of arguments (strings) | |
325 | # Will be executed without interference from a shell. (Parameters are passed | |
326 | # as is, no escape sequences of strings will be touched.) | |
327 | # -) an array of arrays | |
328 | # Each array represents a command, and each command's output is piped into | |
329 | # the following command's standard input. | |
330 | # For this a shell command string is created with pipe symbols between each | |
331 | # command. | |
332 | # Each command is a list of strings meant to end up in the final command | |
333 | # unchanged. In order to achieve this, every argument is shell-quoted. | |
334 | # Quoting can be disabled for a particular argument by turning it into a | |
335 | # reference, this allows inserting arbitrary shell options. | |
336 | # For instance: the $cmd [ [ 'echo', 'hello', \'>/dev/null' ] ] will not | |
337 | # produce any output, while the $cmd [ [ 'echo', 'hello', '>/dev/null' ] ] | |
338 | # will literally print: hello >/dev/null | |
339 | sub run_command { | |
340 | my ($cmd, %param) = @_; | |
341 | ||
342 | my $old_umask; | |
343 | my $cmdstr; | |
344 | ||
345 | if (my $ref = ref($cmd)) { | |
346 | if (ref($cmd->[0])) { | |
347 | $cmdstr = 'set -o pipefail && '; | |
348 | my $pipe = ''; | |
349 | foreach my $command (@$cmd) { | |
350 | # concatenate quoted parameters | |
351 | # strings which are passed by reference are NOT shell quoted | |
352 | $cmdstr .= $pipe . join(' ', map { ref($_) ? $$_ : shellquote($_) } @$command); | |
353 | $pipe = ' | '; | |
354 | } | |
355 | $cmd = [ '/bin/bash', '-c', "$cmdstr" ]; | |
356 | } else { | |
357 | $cmdstr = cmd2string($cmd); | |
358 | } | |
359 | } else { | |
360 | $cmdstr = $cmd; | |
361 | if ($cmd =~ m/\|/) { | |
362 | # see 'man bash' for option pipefail | |
363 | $cmd = [ '/bin/bash', '-c', "set -o pipefail && $cmd" ]; | |
364 | } else { | |
365 | $cmd = [ $cmd ]; | |
366 | } | |
367 | } | |
368 | ||
369 | my $errmsg; | |
370 | my $laststderr; | |
371 | my $timeout; | |
372 | my $oldtimeout; | |
373 | my $pid; | |
374 | my $exitcode = -1; | |
375 | ||
376 | my $outfunc; | |
377 | my $errfunc; | |
378 | my $logfunc; | |
379 | my $input; | |
380 | my $output; | |
381 | my $afterfork; | |
382 | my $noerr; | |
383 | my $keeplocale; | |
384 | my $quiet; | |
385 | ||
386 | eval { | |
387 | ||
388 | foreach my $p (keys %param) { | |
389 | if ($p eq 'timeout') { | |
390 | $timeout = $param{$p}; | |
391 | } elsif ($p eq 'umask') { | |
392 | $old_umask = umask($param{$p}); | |
393 | } elsif ($p eq 'errmsg') { | |
394 | $errmsg = $param{$p}; | |
395 | } elsif ($p eq 'input') { | |
396 | $input = $param{$p}; | |
397 | } elsif ($p eq 'output') { | |
398 | $output = $param{$p}; | |
399 | } elsif ($p eq 'outfunc') { | |
400 | $outfunc = $param{$p}; | |
401 | } elsif ($p eq 'errfunc') { | |
402 | $errfunc = $param{$p}; | |
403 | } elsif ($p eq 'logfunc') { | |
404 | $logfunc = $param{$p}; | |
405 | } elsif ($p eq 'afterfork') { | |
406 | $afterfork = $param{$p}; | |
407 | } elsif ($p eq 'noerr') { | |
408 | $noerr = $param{$p}; | |
409 | } elsif ($p eq 'keeplocale') { | |
410 | $keeplocale = $param{$p}; | |
411 | } elsif ($p eq 'quiet') { | |
412 | $quiet = $param{$p}; | |
413 | } else { | |
414 | die "got unknown parameter '$p' for run_command\n"; | |
415 | } | |
416 | } | |
417 | ||
418 | if ($errmsg) { | |
419 | my $origerrfunc = $errfunc; | |
420 | $errfunc = sub { | |
421 | if ($laststderr) { | |
422 | if ($origerrfunc) { | |
423 | &$origerrfunc("$laststderr\n"); | |
424 | } else { | |
425 | print STDERR "$laststderr\n" if $laststderr; | |
426 | } | |
427 | } | |
428 | $laststderr = shift; | |
429 | }; | |
430 | } | |
431 | ||
432 | my $reader = $output && $output =~ m/^>&/ ? $output : IO::File->new(); | |
433 | my $writer = $input && $input =~ m/^<&/ ? $input : IO::File->new(); | |
434 | my $error = IO::File->new(); | |
435 | ||
436 | my $orig_pid = $$; | |
437 | ||
438 | eval { | |
439 | local $ENV{LC_ALL} = 'C' if !$keeplocale; | |
440 | ||
441 | # suppress LVM warnings like: "File descriptor 3 left open"; | |
442 | local $ENV{LVM_SUPPRESS_FD_WARNINGS} = "1"; | |
443 | ||
444 | $pid = open3($writer, $reader, $error, @$cmd) || die $!; | |
445 | ||
446 | # if we pipe fron STDIN, open3 closes STDIN, so we we | |
447 | # a perl warning "Filehandle STDIN reopened as GENXYZ .. " | |
448 | # as soon as we open a new file. | |
449 | # to avoid that we open /dev/null | |
450 | if (!ref($writer) && !defined(fileno(STDIN))) { | |
451 | POSIX::close(0); | |
452 | open(STDIN, "</dev/null"); | |
453 | } | |
454 | }; | |
455 | ||
456 | my $err = $@; | |
457 | ||
458 | # catch exec errors | |
459 | if ($orig_pid != $$) { | |
460 | warn "ERROR: $err"; | |
461 | POSIX::_exit (1); | |
462 | kill ('KILL', $$); | |
463 | } | |
464 | ||
465 | die $err if $err; | |
466 | ||
467 | local $SIG{ALRM} = sub { die "got timeout\n"; } if $timeout; | |
468 | $oldtimeout = alarm($timeout) if $timeout; | |
469 | ||
470 | &$afterfork() if $afterfork; | |
471 | ||
472 | if (ref($writer)) { | |
473 | print $writer $input if defined $input; | |
474 | close $writer; | |
475 | } | |
476 | ||
477 | my $select = new IO::Select; | |
478 | $select->add($reader) if ref($reader); | |
479 | $select->add($error); | |
480 | ||
481 | my $outlog = ''; | |
482 | my $errlog = ''; | |
483 | ||
484 | my $starttime = time(); | |
485 | ||
486 | while ($select->count) { | |
487 | my @handles = $select->can_read(1); | |
488 | ||
489 | foreach my $h (@handles) { | |
490 | my $buf = ''; | |
491 | my $count = sysread ($h, $buf, 4096); | |
492 | if (!defined ($count)) { | |
493 | my $err = $!; | |
494 | kill (9, $pid); | |
495 | waitpid ($pid, 0); | |
496 | die $err; | |
497 | } | |
498 | $select->remove ($h) if !$count; | |
499 | if ($h eq $reader) { | |
500 | if ($outfunc || $logfunc) { | |
501 | eval { | |
502 | while ($buf =~ s/^([^\010\r\n]*)(?:\n|(?:\010)+|\r\n?)//) { | |
503 | my $line = $outlog . $1; | |
504 | $outlog = ''; | |
505 | &$outfunc($line) if $outfunc; | |
506 | &$logfunc($line) if $logfunc; | |
507 | } | |
508 | $outlog .= $buf; | |
509 | }; | |
510 | my $err = $@; | |
511 | if ($err) { | |
512 | kill (9, $pid); | |
513 | waitpid ($pid, 0); | |
514 | die $err; | |
515 | } | |
516 | } elsif (!$quiet) { | |
517 | print $buf; | |
518 | *STDOUT->flush(); | |
519 | } | |
520 | } elsif ($h eq $error) { | |
521 | if ($errfunc || $logfunc) { | |
522 | eval { | |
523 | while ($buf =~ s/^([^\010\r\n]*)(?:\n|(?:\010)+|\r\n?)//) { | |
524 | my $line = $errlog . $1; | |
525 | $errlog = ''; | |
526 | &$errfunc($line) if $errfunc; | |
527 | &$logfunc($line) if $logfunc; | |
528 | } | |
529 | $errlog .= $buf; | |
530 | }; | |
531 | my $err = $@; | |
532 | if ($err) { | |
533 | kill (9, $pid); | |
534 | waitpid ($pid, 0); | |
535 | die $err; | |
536 | } | |
537 | } elsif (!$quiet) { | |
538 | print STDERR $buf; | |
539 | *STDERR->flush(); | |
540 | } | |
541 | } | |
542 | } | |
543 | } | |
544 | ||
545 | &$outfunc($outlog) if $outfunc && $outlog; | |
546 | &$logfunc($outlog) if $logfunc && $outlog; | |
547 | ||
548 | &$errfunc($errlog) if $errfunc && $errlog; | |
549 | &$logfunc($errlog) if $logfunc && $errlog; | |
550 | ||
551 | waitpid ($pid, 0); | |
552 | ||
553 | if ($? == -1) { | |
554 | die "failed to execute\n"; | |
555 | } elsif (my $sig = ($? & 127)) { | |
556 | die "got signal $sig\n"; | |
557 | } elsif ($exitcode = ($? >> 8)) { | |
558 | if (!($exitcode == 24 && ($cmdstr =~ m|^(\S+/)?rsync\s|))) { | |
559 | if ($errmsg && $laststderr) { | |
560 | my $lerr = $laststderr; | |
561 | $laststderr = undef; | |
562 | die "$lerr\n"; | |
563 | } | |
564 | die "exit code $exitcode\n"; | |
565 | } | |
566 | } | |
567 | ||
568 | alarm(0); | |
569 | }; | |
570 | ||
571 | my $err = $@; | |
572 | ||
573 | alarm(0); | |
574 | ||
575 | if ($errmsg && $laststderr) { | |
576 | &$errfunc(undef); # flush laststderr | |
577 | } | |
578 | ||
579 | umask ($old_umask) if defined($old_umask); | |
580 | ||
581 | alarm($oldtimeout) if $oldtimeout; | |
582 | ||
583 | if ($err) { | |
584 | if ($pid && ($err eq "got timeout\n")) { | |
585 | kill (9, $pid); | |
586 | waitpid ($pid, 0); | |
587 | die "command '$cmdstr' failed: $err"; | |
588 | } | |
589 | ||
590 | if ($errmsg) { | |
591 | $err =~ s/^usermod:\s*// if $cmdstr =~ m|^(\S+/)?usermod\s|; | |
592 | die "$errmsg: $err"; | |
593 | } elsif(!$noerr) { | |
594 | die "command '$cmdstr' failed: $err"; | |
595 | } | |
596 | } | |
597 | ||
598 | return $exitcode; | |
599 | } | |
600 | ||
601 | # Run a command with a tcp socket as standard input. | |
602 | sub pipe_socket_to_command { | |
603 | my ($cmd, $ip, $port) = @_; | |
604 | ||
605 | my $params = { | |
606 | Listen => 1, | |
607 | ReuseAddr => 1, | |
608 | Proto => &Socket::IPPROTO_TCP, | |
609 | GetAddrInfoFlags => 0, | |
610 | LocalAddr => $ip, | |
611 | LocalPort => $port, | |
612 | }; | |
613 | my $socket = IO::Socket::IP->new(%$params) or die "failed to open socket: $!\n"; | |
614 | ||
615 | print "$ip\n$port\n"; # tell remote where to connect | |
616 | *STDOUT->flush(); | |
617 | ||
618 | alarm 0; | |
619 | local $SIG{ALRM} = sub { die "timed out waiting for client\n" }; | |
620 | alarm 30; | |
621 | my $client = $socket->accept; # Wait for a client | |
622 | alarm 0; | |
623 | close($socket); | |
624 | ||
625 | # We want that the command talks over the TCP socket and takes | |
626 | # ownership of it, so that when it closes it the connection is | |
627 | # terminated, so we need to be able to close the socket. So we | |
628 | # can't really use PVE::Tools::run_command(). | |
629 | my $pid = fork() // die "fork failed: $!\n"; | |
630 | if (!$pid) { | |
631 | POSIX::dup2(fileno($client), 0); | |
632 | POSIX::dup2(fileno($client), 1); | |
633 | close($client); | |
634 | exec {$cmd->[0]} @$cmd or do { | |
635 | warn "exec failed: $!\n"; | |
636 | POSIX::_exit(1); | |
637 | }; | |
638 | } | |
639 | ||
640 | close($client); | |
641 | if (waitpid($pid, 0) != $pid) { | |
642 | kill(15 => $pid); # if we got interrupted terminate the child | |
643 | my $count = 0; | |
644 | while (waitpid($pid, POSIX::WNOHANG) != $pid) { | |
645 | usleep(100000); | |
646 | $count++; | |
647 | kill(9 => $pid), last if $count > 300; # 30 second timeout | |
648 | } | |
649 | } | |
650 | if (my $sig = ($? & 127)) { | |
651 | die "got signal $sig\n"; | |
652 | } elsif (my $exitcode = ($? >> 8)) { | |
653 | die "exit code $exitcode\n"; | |
654 | } | |
655 | ||
656 | return undef; | |
657 | } | |
658 | ||
659 | sub split_list { | |
660 | my $listtxt = shift // ''; | |
661 | ||
662 | return split (/\0/, $listtxt) if $listtxt =~ m/\0/; | |
663 | ||
664 | $listtxt =~ s/[,;]/ /g; | |
665 | $listtxt =~ s/^\s+//; | |
666 | ||
667 | my @data = split (/\s+/, $listtxt); | |
668 | ||
669 | return @data; | |
670 | } | |
671 | ||
672 | sub trim { | |
673 | my $txt = shift; | |
674 | ||
675 | return $txt if !defined($txt); | |
676 | ||
677 | $txt =~ s/^\s+//; | |
678 | $txt =~ s/\s+$//; | |
679 | ||
680 | return $txt; | |
681 | } | |
682 | ||
683 | # simple uri templates like "/vms/{vmid}" | |
684 | sub template_replace { | |
685 | my ($tmpl, $data) = @_; | |
686 | ||
687 | return $tmpl if !$tmpl; | |
688 | ||
689 | my $res = ''; | |
690 | while ($tmpl =~ m/([^{]+)?(\{([^}]+)\})?/g) { | |
691 | $res .= $1 if $1; | |
692 | $res .= ($data->{$3} || '-') if $2; | |
693 | } | |
694 | return $res; | |
695 | } | |
696 | ||
697 | sub safe_print { | |
698 | my ($filename, $fh, $data) = @_; | |
699 | ||
700 | return if !$data; | |
701 | ||
702 | my $res = print $fh $data; | |
703 | ||
704 | die "write to '$filename' failed\n" if !$res; | |
705 | } | |
706 | ||
707 | sub debmirrors { | |
708 | ||
709 | return { | |
710 | 'at' => 'ftp.at.debian.org', | |
711 | 'au' => 'ftp.au.debian.org', | |
712 | 'be' => 'ftp.be.debian.org', | |
713 | 'bg' => 'ftp.bg.debian.org', | |
714 | 'br' => 'ftp.br.debian.org', | |
715 | 'ca' => 'ftp.ca.debian.org', | |
716 | 'ch' => 'ftp.ch.debian.org', | |
717 | 'cl' => 'ftp.cl.debian.org', | |
718 | 'cz' => 'ftp.cz.debian.org', | |
719 | 'de' => 'ftp.de.debian.org', | |
720 | 'dk' => 'ftp.dk.debian.org', | |
721 | 'ee' => 'ftp.ee.debian.org', | |
722 | 'es' => 'ftp.es.debian.org', | |
723 | 'fi' => 'ftp.fi.debian.org', | |
724 | 'fr' => 'ftp.fr.debian.org', | |
725 | 'gr' => 'ftp.gr.debian.org', | |
726 | 'hk' => 'ftp.hk.debian.org', | |
727 | 'hr' => 'ftp.hr.debian.org', | |
728 | 'hu' => 'ftp.hu.debian.org', | |
729 | 'ie' => 'ftp.ie.debian.org', | |
730 | 'is' => 'ftp.is.debian.org', | |
731 | 'it' => 'ftp.it.debian.org', | |
732 | 'jp' => 'ftp.jp.debian.org', | |
733 | 'kr' => 'ftp.kr.debian.org', | |
734 | 'mx' => 'ftp.mx.debian.org', | |
735 | 'nl' => 'ftp.nl.debian.org', | |
736 | 'no' => 'ftp.no.debian.org', | |
737 | 'nz' => 'ftp.nz.debian.org', | |
738 | 'pl' => 'ftp.pl.debian.org', | |
739 | 'pt' => 'ftp.pt.debian.org', | |
740 | 'ro' => 'ftp.ro.debian.org', | |
741 | 'ru' => 'ftp.ru.debian.org', | |
742 | 'se' => 'ftp.se.debian.org', | |
743 | 'si' => 'ftp.si.debian.org', | |
744 | 'sk' => 'ftp.sk.debian.org', | |
745 | 'tr' => 'ftp.tr.debian.org', | |
746 | 'tw' => 'ftp.tw.debian.org', | |
747 | 'gb' => 'ftp.uk.debian.org', | |
748 | 'us' => 'ftp.us.debian.org', | |
749 | }; | |
750 | } | |
751 | ||
752 | my $keymaphash = { | |
753 | 'dk' => ['Danish', 'da', 'qwerty/dk-latin1.kmap.gz', 'dk', 'nodeadkeys'], | |
754 | 'de' => ['German', 'de', 'qwertz/de-latin1-nodeadkeys.kmap.gz', 'de', 'nodeadkeys' ], | |
755 | 'de-ch' => ['Swiss-German', 'de-ch', 'qwertz/sg-latin1.kmap.gz', 'ch', 'de_nodeadkeys' ], | |
756 | 'en-gb' => ['United Kingdom', 'en-gb', 'qwerty/uk.kmap.gz' , 'gb', undef], | |
757 | 'en-us' => ['U.S. English', 'en-us', 'qwerty/us-latin1.kmap.gz', 'us', undef ], | |
758 | 'es' => ['Spanish', 'es', 'qwerty/es.kmap.gz', 'es', 'nodeadkeys'], | |
759 | #'et' => [], # Ethopia or Estonia ?? | |
760 | 'fi' => ['Finnish', 'fi', 'qwerty/fi-latin1.kmap.gz', 'fi', 'nodeadkeys'], | |
761 | #'fo' => ['Faroe Islands', 'fo', ???, 'fo', 'nodeadkeys'], | |
762 | 'fr' => ['French', 'fr', 'azerty/fr-latin1.kmap.gz', 'fr', 'nodeadkeys'], | |
763 | 'fr-be' => ['Belgium-French', 'fr-be', 'azerty/be2-latin1.kmap.gz', 'be', 'nodeadkeys'], | |
764 | 'fr-ca' => ['Canada-French', 'fr-ca', 'qwerty/cf.kmap.gz', 'ca', 'fr-legacy'], | |
765 | 'fr-ch' => ['Swiss-French', 'fr-ch', 'qwertz/fr_CH-latin1.kmap.gz', 'ch', 'fr_nodeadkeys'], | |
766 | #'hr' => ['Croatia', 'hr', 'qwertz/croat.kmap.gz', 'hr', ??], # latin2? | |
767 | 'hu' => ['Hungarian', 'hu', 'qwertz/hu.kmap.gz', 'hu', undef], | |
768 | 'is' => ['Icelandic', 'is', 'qwerty/is-latin1.kmap.gz', 'is', 'nodeadkeys'], | |
769 | 'it' => ['Italian', 'it', 'qwerty/it2.kmap.gz', 'it', 'nodeadkeys'], | |
770 | 'jp' => ['Japanese', 'ja', 'qwerty/jp106.kmap.gz', 'jp', undef], | |
771 | 'lt' => ['Lithuanian', 'lt', 'qwerty/lt.kmap.gz', 'lt', 'std'], | |
772 | #'lv' => ['Latvian', 'lv', 'qwerty/lv-latin4.kmap.gz', 'lv', ??], # latin4 or latin7? | |
773 | 'mk' => ['Macedonian', 'mk', 'qwerty/mk.kmap.gz', 'mk', 'nodeadkeys'], | |
774 | 'nl' => ['Dutch', 'nl', 'qwerty/nl.kmap.gz', 'nl', undef], | |
775 | #'nl-be' => ['Belgium-Dutch', 'nl-be', ?, ?, ?], | |
776 | 'no' => ['Norwegian', 'no', 'qwerty/no-latin1.kmap.gz', 'no', 'nodeadkeys'], | |
777 | 'pl' => ['Polish', 'pl', 'qwerty/pl.kmap.gz', 'pl', undef], | |
778 | 'pt' => ['Portuguese', 'pt', 'qwerty/pt-latin1.kmap.gz', 'pt', 'nodeadkeys'], | |
779 | 'pt-br' => ['Brazil-Portuguese', 'pt-br', 'qwerty/br-latin1.kmap.gz', 'br', 'nodeadkeys'], | |
780 | #'ru' => ['Russian', 'ru', 'qwerty/ru.kmap.gz', 'ru', undef], # don't know? | |
781 | 'si' => ['Slovenian', 'sl', 'qwertz/slovene.kmap.gz', 'si', undef], | |
782 | 'se' => ['Swedish', 'sv', 'qwerty/se-latin1.kmap.gz', 'se', 'nodeadkeys'], | |
783 | #'th' => [], | |
784 | 'tr' => ['Turkish', 'tr', 'qwerty/trq.kmap.gz', 'tr', undef], | |
785 | }; | |
786 | ||
787 | my $kvmkeymaparray = []; | |
788 | foreach my $lc (sort keys %$keymaphash) { | |
789 | push @$kvmkeymaparray, $keymaphash->{$lc}->[1]; | |
790 | } | |
791 | ||
792 | sub kvmkeymaps { | |
793 | return $keymaphash; | |
794 | } | |
795 | ||
796 | sub kvmkeymaplist { | |
797 | return $kvmkeymaparray; | |
798 | } | |
799 | ||
800 | sub extract_param { | |
801 | my ($param, $key) = @_; | |
802 | ||
803 | my $res = $param->{$key}; | |
804 | delete $param->{$key}; | |
805 | ||
806 | return $res; | |
807 | } | |
808 | ||
809 | # Note: we use this to wait until vncterm/spiceterm is ready | |
810 | sub wait_for_vnc_port { | |
811 | my ($port, $family, $timeout) = @_; | |
812 | ||
813 | $timeout = 5 if !$timeout; | |
814 | my $sleeptime = 0; | |
815 | my $starttime = [gettimeofday]; | |
816 | my $elapsed; | |
817 | ||
818 | my $cmd = ['/bin/ss', '-Htln', "sport = :$port"]; | |
819 | push @$cmd, $family == AF_INET6 ? '-6' : '-4' if defined($family); | |
820 | ||
821 | my $found; | |
822 | while (($elapsed = tv_interval($starttime)) < $timeout) { | |
823 | # -Htln = don't print header, tcp, listening sockets only, numeric ports | |
824 | run_command($cmd, outfunc => sub { | |
825 | my $line = shift; | |
826 | if ($line =~ m/^LISTEN\s+\d+\s+\d+\s+\S+:(\d+)\s/) { | |
827 | $found = 1 if ($port == $1); | |
828 | } | |
829 | }); | |
830 | return 1 if $found; | |
831 | $sleeptime += 100000 if $sleeptime < 1000000; | |
832 | usleep($sleeptime); | |
833 | } | |
834 | ||
835 | die "Timeout while waiting for port '$port' to get ready!\n"; | |
836 | } | |
837 | ||
838 | sub next_unused_port { | |
839 | my ($range_start, $range_end, $family, $address) = @_; | |
840 | ||
841 | # We use a file to register allocated ports. | |
842 | # Those registrations expires after $expiretime. | |
843 | # We use this to avoid race conditions between | |
844 | # allocation and use of ports. | |
845 | ||
846 | my $filename = "/var/tmp/pve-reserved-ports"; | |
847 | ||
848 | my $code = sub { | |
849 | ||
850 | my $expiretime = 5; | |
851 | my $ctime = time(); | |
852 | ||
853 | my $ports = {}; | |
854 | ||
855 | if (my $fh = IO::File->new ($filename, "r")) { | |
856 | while (my $line = <$fh>) { | |
857 | if ($line =~ m/^(\d+)\s(\d+)$/) { | |
858 | my ($port, $timestamp) = ($1, $2); | |
859 | if (($timestamp + $expiretime) > $ctime) { | |
860 | $ports->{$port} = $timestamp; # not expired | |
861 | } | |
862 | } | |
863 | } | |
864 | } | |
865 | ||
866 | my $newport; | |
867 | my %sockargs = (Listen => 5, | |
868 | ReuseAddr => 1, | |
869 | Family => $family, | |
870 | Proto => IPPROTO_TCP, | |
871 | GetAddrInfoFlags => 0); | |
872 | $sockargs{LocalAddr} = $address if defined($address); | |
873 | ||
874 | for (my $p = $range_start; $p < $range_end; $p++) { | |
875 | next if $ports->{$p}; # reserved | |
876 | ||
877 | $sockargs{LocalPort} = $p; | |
878 | my $sock = IO::Socket::IP->new(%sockargs); | |
879 | ||
880 | if ($sock) { | |
881 | close($sock); | |
882 | $newport = $p; | |
883 | $ports->{$p} = $ctime; | |
884 | last; | |
885 | } | |
886 | } | |
887 | ||
888 | my $data = ""; | |
889 | foreach my $p (keys %$ports) { | |
890 | $data .= "$p $ports->{$p}\n"; | |
891 | } | |
892 | ||
893 | file_set_contents($filename, $data); | |
894 | ||
895 | return $newport; | |
896 | }; | |
897 | ||
898 | my $p = lock_file('/var/lock/pve-ports.lck', 10, $code); | |
899 | die $@ if $@; | |
900 | ||
901 | die "unable to find free port (${range_start}-${range_end})\n" if !$p; | |
902 | ||
903 | return $p; | |
904 | } | |
905 | ||
906 | sub next_migrate_port { | |
907 | my ($family, $address) = @_; | |
908 | return next_unused_port(60000, 60050, $family, $address); | |
909 | } | |
910 | ||
911 | sub next_vnc_port { | |
912 | my ($family, $address) = @_; | |
913 | return next_unused_port(5900, 6000, $family, $address); | |
914 | } | |
915 | ||
916 | sub spice_port_range { | |
917 | return (61000, 61999); | |
918 | } | |
919 | ||
920 | sub next_spice_port { | |
921 | my ($family, $address) = @_; | |
922 | return next_unused_port(spice_port_range(), $family, $address); | |
923 | } | |
924 | ||
925 | sub must_stringify { | |
926 | my ($value) = @_; | |
927 | eval { $value = "$value" }; | |
928 | return "error turning value into a string: $@" if $@; | |
929 | return $value; | |
930 | } | |
931 | ||
932 | # sigkill after $timeout a $sub running in a fork if it can't write a pipe | |
933 | # the $sub has to return a single scalar | |
934 | sub run_fork_with_timeout { | |
935 | my ($timeout, $sub) = @_; | |
936 | ||
937 | my $res; | |
938 | my $error; | |
939 | my $pipe_out = IO::Pipe->new(); | |
940 | ||
941 | # disable pending alarms, save their remaining time | |
942 | my $prev_alarm = alarm 0; | |
943 | ||
944 | # avoid leaving a zombie if the parent gets interrupted | |
945 | my $sig_received; | |
946 | ||
947 | my $child = fork(); | |
948 | if (!defined($child)) { | |
949 | die "fork failed: $!\n"; | |
950 | return $res; | |
951 | } | |
952 | ||
953 | if (!$child) { | |
954 | $pipe_out->writer(); | |
955 | ||
956 | eval { | |
957 | $res = $sub->(); | |
958 | print {$pipe_out} encode_json({ result => $res }); | |
959 | $pipe_out->flush(); | |
960 | }; | |
961 | if (my $err = $@) { | |
962 | print {$pipe_out} encode_json({ error => must_stringify($err) }); | |
963 | $pipe_out->flush(); | |
964 | POSIX::_exit(1); | |
965 | } | |
966 | POSIX::_exit(0); | |
967 | } | |
968 | ||
969 | local $SIG{INT} = sub { $sig_received++; }; | |
970 | local $SIG{TERM} = sub { | |
971 | $error //= "interrupted by unexpected signal\n"; | |
972 | kill('TERM', $child); | |
973 | }; | |
974 | ||
975 | $pipe_out->reader(); | |
976 | ||
977 | my $readvalues = sub { | |
978 | local $/ = undef; | |
979 | my $child_res = decode_json(readline_nointr($pipe_out)); | |
980 | $res = $child_res->{result}; | |
981 | $error = $child_res->{error}; | |
982 | }; | |
983 | eval { | |
984 | if (defined($timeout)) { | |
985 | run_with_timeout($timeout, $readvalues); | |
986 | } else { | |
987 | $readvalues->(); | |
988 | } | |
989 | }; | |
990 | warn $@ if $@; | |
991 | $pipe_out->close(); | |
992 | kill('KILL', $child); | |
993 | waitpid($child, 0); | |
994 | ||
995 | alarm $prev_alarm; | |
996 | die "interrupted by unexpected signal\n" if $sig_received; | |
997 | ||
998 | die $error if $error; | |
999 | return $res; | |
1000 | } | |
1001 | ||
1002 | sub run_fork { | |
1003 | my ($code) = @_; | |
1004 | return run_fork_with_timeout(undef, $code); | |
1005 | } | |
1006 | ||
1007 | # NOTE: NFS syscall can't be interrupted, so alarm does | |
1008 | # not work to provide timeouts. | |
1009 | # from 'man nfs': "Only SIGKILL can interrupt a pending NFS operation" | |
1010 | # So fork() before using Filesys::Df | |
1011 | sub df { | |
1012 | my ($path, $timeout) = @_; | |
1013 | ||
1014 | my $df = sub { return Filesys::Df::df($path, 1) }; | |
1015 | ||
1016 | my $res = eval { run_fork_with_timeout($timeout, $df) } // {}; | |
1017 | warn $@ if $@; | |
1018 | ||
1019 | # untaint, but be flexible: PB usage can result in scientific notation | |
1020 | my ($blocks, $used, $bavail) = map { defined($_) ? (/^([\d\.e\-+]+)$/) : 0 } | |
1021 | $res->@{qw(blocks used bavail)}; | |
1022 | ||
1023 | return { | |
1024 | total => $blocks, | |
1025 | used => $used, | |
1026 | avail => $bavail, | |
1027 | }; | |
1028 | } | |
1029 | ||
1030 | sub du { | |
1031 | my ($path, $timeout) = @_; | |
1032 | ||
1033 | my $size; | |
1034 | ||
1035 | $timeout //= 10; | |
1036 | ||
1037 | my $parser = sub { | |
1038 | my $line = shift; | |
1039 | ||
1040 | if ($line =~ m/^(\d+)\s+total$/) { | |
1041 | $size = $1; | |
1042 | } | |
1043 | }; | |
1044 | ||
1045 | run_command(['du', '-scb', $path], outfunc => $parser, timeout => $timeout); | |
1046 | ||
1047 | return $size; | |
1048 | } | |
1049 | ||
1050 | # UPID helper | |
1051 | # We use this to uniquely identify a process. | |
1052 | # An 'Unique Process ID' has the following format: | |
1053 | # "UPID:$node:$pid:$pstart:$startime:$dtype:$id:$user" | |
1054 | ||
1055 | sub upid_encode { | |
1056 | my $d = shift; | |
1057 | ||
1058 | # Note: pstart can be > 32bit if uptime > 497 days, so this can result in | |
1059 | # more that 8 characters for pstart | |
1060 | return sprintf("UPID:%s:%08X:%08X:%08X:%s:%s:%s:", $d->{node}, $d->{pid}, | |
1061 | $d->{pstart}, $d->{starttime}, $d->{type}, $d->{id}, | |
1062 | $d->{user}); | |
1063 | } | |
1064 | ||
1065 | sub upid_decode { | |
1066 | my ($upid, $noerr) = @_; | |
1067 | ||
1068 | my $res; | |
1069 | my $filename; | |
1070 | ||
1071 | # "UPID:$node:$pid:$pstart:$startime:$dtype:$id:$user" | |
1072 | # Note: allow up to 9 characters for pstart (work until 20 years uptime) | |
1073 | 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]+):$/) { | |
1074 | $res->{node} = $1; | |
1075 | $res->{pid} = hex($3); | |
1076 | $res->{pstart} = hex($4); | |
1077 | $res->{starttime} = hex($5); | |
1078 | $res->{type} = $6; | |
1079 | $res->{id} = $7; | |
1080 | $res->{user} = $8; | |
1081 | ||
1082 | my $subdir = substr($5, 7, 8); | |
1083 | $filename = "$pvetaskdir/$subdir/$upid"; | |
1084 | ||
1085 | } else { | |
1086 | return undef if $noerr; | |
1087 | die "unable to parse worker upid '$upid'\n"; | |
1088 | } | |
1089 | ||
1090 | return wantarray ? ($res, $filename) : $res; | |
1091 | } | |
1092 | ||
1093 | sub upid_open { | |
1094 | my ($upid) = @_; | |
1095 | ||
1096 | my ($task, $filename) = upid_decode($upid); | |
1097 | ||
1098 | my $dirname = dirname($filename); | |
1099 | make_path($dirname); | |
1100 | ||
1101 | my $wwwid = getpwnam('www-data') || | |
1102 | die "getpwnam failed"; | |
1103 | ||
1104 | my $perm = 0640; | |
1105 | ||
1106 | my $outfh = IO::File->new ($filename, O_WRONLY|O_CREAT|O_EXCL, $perm) || | |
1107 | die "unable to create output file '$filename' - $!\n"; | |
1108 | chown $wwwid, -1, $outfh; | |
1109 | ||
1110 | return $outfh; | |
1111 | }; | |
1112 | ||
1113 | sub upid_read_status { | |
1114 | my ($upid) = @_; | |
1115 | ||
1116 | my ($task, $filename) = upid_decode($upid); | |
1117 | my $fh = IO::File->new($filename, "r"); | |
1118 | return "unable to open file - $!" if !$fh; | |
1119 | my $maxlen = 4096; | |
1120 | sysseek($fh, -$maxlen, 2); | |
1121 | my $readbuf = ''; | |
1122 | my $br = sysread($fh, $readbuf, $maxlen); | |
1123 | close($fh); | |
1124 | if ($br) { | |
1125 | return "unable to extract last line" | |
1126 | if $readbuf !~ m/\n?(.+)$/; | |
1127 | my $line = $1; | |
1128 | if ($line =~ m/^TASK OK$/) { | |
1129 | return 'OK'; | |
1130 | } elsif ($line =~ m/^TASK ERROR: (.+)$/) { | |
1131 | return $1; | |
1132 | } else { | |
1133 | return "unexpected status"; | |
1134 | } | |
1135 | } | |
1136 | return "unable to read tail (got $br bytes)"; | |
1137 | } | |
1138 | ||
1139 | # useful functions to store comments in config files | |
1140 | sub encode_text { | |
1141 | my ($text) = @_; | |
1142 | ||
1143 | # all control and hi-bit characters, and ':' | |
1144 | my $unsafe = "^\x20-\x39\x3b-\x7e"; | |
1145 | return uri_escape(Encode::encode("utf8", $text), $unsafe); | |
1146 | } | |
1147 | ||
1148 | sub decode_text { | |
1149 | my ($data) = @_; | |
1150 | ||
1151 | return Encode::decode("utf8", uri_unescape($data)); | |
1152 | } | |
1153 | ||
1154 | # depreciated - do not use! | |
1155 | # we now decode all parameters by default | |
1156 | sub decode_utf8_parameters { | |
1157 | my ($param) = @_; | |
1158 | ||
1159 | foreach my $p (qw(comment description firstname lastname)) { | |
1160 | $param->{$p} = decode('utf8', $param->{$p}) if $param->{$p}; | |
1161 | } | |
1162 | ||
1163 | return $param; | |
1164 | } | |
1165 | ||
1166 | sub random_ether_addr { | |
1167 | my ($prefix) = @_; | |
1168 | ||
1169 | my ($seconds, $microseconds) = gettimeofday; | |
1170 | ||
1171 | my $rand = Digest::SHA::sha1($$, rand(), $seconds, $microseconds); | |
1172 | ||
1173 | # clear multicast, set local id | |
1174 | vec($rand, 0, 8) = (vec($rand, 0, 8) & 0xfe) | 2; | |
1175 | ||
1176 | my $addr = sprintf("%02X:%02X:%02X:%02X:%02X:%02X", unpack("C6", $rand)); | |
1177 | if (defined($prefix)) { | |
1178 | $addr = uc($prefix) . substr($addr, length($prefix)); | |
1179 | } | |
1180 | return $addr; | |
1181 | } | |
1182 | ||
1183 | sub shellquote { | |
1184 | my $str = shift; | |
1185 | ||
1186 | return String::ShellQuote::shell_quote($str); | |
1187 | } | |
1188 | ||
1189 | sub cmd2string { | |
1190 | my ($cmd) = @_; | |
1191 | ||
1192 | die "no arguments" if !$cmd; | |
1193 | ||
1194 | return $cmd if !ref($cmd); | |
1195 | ||
1196 | my @qa = (); | |
1197 | foreach my $arg (@$cmd) { push @qa, shellquote($arg); } | |
1198 | ||
1199 | return join (' ', @qa); | |
1200 | } | |
1201 | ||
1202 | # split an shell argument string into an array, | |
1203 | sub split_args { | |
1204 | my ($str) = @_; | |
1205 | ||
1206 | return $str ? [ Text::ParseWords::shellwords($str) ] : []; | |
1207 | } | |
1208 | ||
1209 | sub dump_logfile { | |
1210 | my ($filename, $start, $limit, $filter) = @_; | |
1211 | ||
1212 | my $lines = []; | |
1213 | my $count = 0; | |
1214 | ||
1215 | my $fh = IO::File->new($filename, "r"); | |
1216 | if (!$fh) { | |
1217 | $count++; | |
1218 | push @$lines, { n => $count, t => "unable to open file - $!"}; | |
1219 | return ($count, $lines); | |
1220 | } | |
1221 | ||
1222 | $start = 0 if !$start; | |
1223 | $limit = 50 if !$limit; | |
1224 | ||
1225 | my $line; | |
1226 | ||
1227 | if ($filter) { | |
1228 | # duplicate code, so that we do not slow down normal path | |
1229 | while (defined($line = <$fh>)) { | |
1230 | next if $line !~ m/$filter/; | |
1231 | next if $count++ < $start; | |
1232 | next if $limit <= 0; | |
1233 | chomp $line; | |
1234 | push @$lines, { n => $count, t => $line}; | |
1235 | $limit--; | |
1236 | } | |
1237 | } else { | |
1238 | while (defined($line = <$fh>)) { | |
1239 | next if $count++ < $start; | |
1240 | next if $limit <= 0; | |
1241 | chomp $line; | |
1242 | push @$lines, { n => $count, t => $line}; | |
1243 | $limit--; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | close($fh); | |
1248 | ||
1249 | # HACK: ExtJS store.guaranteeRange() does not like empty array | |
1250 | # so we add a line | |
1251 | if (!$count) { | |
1252 | $count++; | |
1253 | push @$lines, { n => $count, t => "no content"}; | |
1254 | } | |
1255 | ||
1256 | return ($count, $lines); | |
1257 | } | |
1258 | ||
1259 | sub dump_journal { | |
1260 | my ($start, $limit, $since, $until, $service) = @_; | |
1261 | ||
1262 | my $lines = []; | |
1263 | my $count = 0; | |
1264 | ||
1265 | $start = 0 if !$start; | |
1266 | $limit = 50 if !$limit; | |
1267 | ||
1268 | my $parser = sub { | |
1269 | my $line = shift; | |
1270 | ||
1271 | return if $count++ < $start; | |
1272 | return if $limit <= 0; | |
1273 | push @$lines, { n => int($count), t => $line}; | |
1274 | $limit--; | |
1275 | }; | |
1276 | ||
1277 | my $cmd = ['journalctl', '-o', 'short', '--no-pager']; | |
1278 | ||
1279 | push @$cmd, '--unit', $service if $service; | |
1280 | push @$cmd, '--since', $since if $since; | |
1281 | push @$cmd, '--until', $until if $until; | |
1282 | run_command($cmd, outfunc => $parser); | |
1283 | ||
1284 | # HACK: ExtJS store.guaranteeRange() does not like empty array | |
1285 | # so we add a line | |
1286 | if (!$count) { | |
1287 | $count++; | |
1288 | push @$lines, { n => $count, t => "no content"}; | |
1289 | } | |
1290 | ||
1291 | return ($count, $lines); | |
1292 | } | |
1293 | ||
1294 | sub dir_glob_regex { | |
1295 | my ($dir, $regex) = @_; | |
1296 | ||
1297 | my $dh = IO::Dir->new ($dir); | |
1298 | return wantarray ? () : undef if !$dh; | |
1299 | ||
1300 | while (defined(my $tmp = $dh->read)) { | |
1301 | if (my @res = $tmp =~ m/^($regex)$/) { | |
1302 | $dh->close; | |
1303 | return wantarray ? @res : $tmp; | |
1304 | } | |
1305 | } | |
1306 | $dh->close; | |
1307 | ||
1308 | return wantarray ? () : undef; | |
1309 | } | |
1310 | ||
1311 | sub dir_glob_foreach { | |
1312 | my ($dir, $regex, $func) = @_; | |
1313 | ||
1314 | my $dh = IO::Dir->new ($dir); | |
1315 | if (defined $dh) { | |
1316 | while (defined(my $tmp = $dh->read)) { | |
1317 | if (my @res = $tmp =~ m/^($regex)$/) { | |
1318 | &$func (@res); | |
1319 | } | |
1320 | } | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | sub assert_if_modified { | |
1325 | my ($digest1, $digest2) = @_; | |
1326 | ||
1327 | if ($digest1 && $digest2 && ($digest1 ne $digest2)) { | |
1328 | die "detected modified configuration - file changed by other user? Try again.\n"; | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | # Digest for short strings | |
1333 | # like FNV32a, but we only return 31 bits (positive numbers) | |
1334 | sub fnv31a { | |
1335 | my ($string) = @_; | |
1336 | ||
1337 | my $hval = 0x811c9dc5; | |
1338 | ||
1339 | foreach my $c (unpack('C*', $string)) { | |
1340 | $hval ^= $c; | |
1341 | $hval += ( | |
1342 | (($hval << 1) ) + | |
1343 | (($hval << 4) ) + | |
1344 | (($hval << 7) ) + | |
1345 | (($hval << 8) ) + | |
1346 | (($hval << 24) ) ); | |
1347 | $hval = $hval & 0xffffffff; | |
1348 | } | |
1349 | return $hval & 0x7fffffff; | |
1350 | } | |
1351 | ||
1352 | sub fnv31a_hex { return sprintf("%X", fnv31a(@_)); } | |
1353 | ||
1354 | sub unpack_sockaddr_in46 { | |
1355 | my ($sin) = @_; | |
1356 | my $family = Socket::sockaddr_family($sin); | |
1357 | my ($port, $host) = ($family == AF_INET6 ? Socket::unpack_sockaddr_in6($sin) | |
1358 | : Socket::unpack_sockaddr_in($sin)); | |
1359 | return ($family, $port, $host); | |
1360 | } | |
1361 | ||
1362 | sub getaddrinfo_all { | |
1363 | my ($hostname, @opts) = @_; | |
1364 | my %hints = ( flags => AI_V4MAPPED | AI_ALL, | |
1365 | @opts ); | |
1366 | my ($err, @res) = Socket::getaddrinfo($hostname, '0', \%hints); | |
1367 | die "failed to get address info for: $hostname: $err\n" if $err; | |
1368 | return @res; | |
1369 | } | |
1370 | ||
1371 | sub get_host_address_family { | |
1372 | my ($hostname, $socktype) = @_; | |
1373 | my @res = getaddrinfo_all($hostname, socktype => $socktype); | |
1374 | return $res[0]->{family}; | |
1375 | } | |
1376 | ||
1377 | # get the fully qualified domain name of a host | |
1378 | # same logic as hostname(1): The FQDN is the name getaddrinfo(3) returns, | |
1379 | # given a nodename as a parameter | |
1380 | sub get_fqdn { | |
1381 | my ($nodename) = @_; | |
1382 | ||
1383 | my $hints = { | |
1384 | flags => AI_CANONNAME, | |
1385 | socktype => SOCK_DGRAM | |
1386 | }; | |
1387 | ||
1388 | my ($err, @addrs) = Socket::getaddrinfo($nodename, undef, $hints); | |
1389 | ||
1390 | die "getaddrinfo: $err" if $err; | |
1391 | ||
1392 | return $addrs[0]->{canonname}; | |
1393 | } | |
1394 | ||
1395 | # Parses any sane kind of host, or host+port pair: | |
1396 | # The port is always optional and thus may be undef. | |
1397 | sub parse_host_and_port { | |
1398 | my ($address) = @_; | |
1399 | if ($address =~ /^($IPV4RE|[[:alnum:]\-.]+)(?::(\d+))?$/ || # ipv4 or host with optional ':port' | |
1400 | $address =~ /^\[($IPV6RE|$IPV4RE|[[:alnum:]\-.]+)\](?::(\d+))?$/ || # anything in brackets with optional ':port' | |
1401 | $address =~ /^($IPV6RE)(?:\.(\d+))?$/) # ipv6 with optional port separated by dot | |
1402 | { | |
1403 | return ($1, $2, 1); # end with 1 to support simple if(parse...) tests | |
1404 | } | |
1405 | return; # nothing | |
1406 | } | |
1407 | ||
1408 | sub setresuid($$$) { | |
1409 | my ($ruid, $euid, $suid) = @_; | |
1410 | return 0 == syscall(PVE::Syscall::setresuid, $ruid, $euid, $suid); | |
1411 | } | |
1412 | ||
1413 | sub unshare($) { | |
1414 | my ($flags) = @_; | |
1415 | return 0 == syscall(PVE::Syscall::unshare, $flags); | |
1416 | } | |
1417 | ||
1418 | sub setns($$) { | |
1419 | my ($fileno, $nstype) = @_; | |
1420 | return 0 == syscall(PVE::Syscall::setns, $fileno, $nstype); | |
1421 | } | |
1422 | ||
1423 | sub syncfs($) { | |
1424 | my ($fileno) = @_; | |
1425 | return 0 == syscall(PVE::Syscall::syncfs, $fileno); | |
1426 | } | |
1427 | ||
1428 | sub fsync($) { | |
1429 | my ($fileno) = @_; | |
1430 | return 0 == syscall(PVE::Syscall::fsync, $fileno); | |
1431 | } | |
1432 | ||
1433 | sub sync_mountpoint { | |
1434 | my ($path) = @_; | |
1435 | sysopen my $fd, $path, O_PATH or die "failed to open $path: $!\n"; | |
1436 | my $result = syncfs(fileno($fd)); | |
1437 | close($fd); | |
1438 | return $result; | |
1439 | } | |
1440 | ||
1441 | # support sending multi-part mail messages with a text and or a HTML part | |
1442 | # mailto may be a single email string or an array of receivers | |
1443 | sub sendmail { | |
1444 | my ($mailto, $subject, $text, $html, $mailfrom, $author) = @_; | |
1445 | my $mail_re = qr/[^-a-zA-Z0-9+._@]/; | |
1446 | ||
1447 | $mailto = [ $mailto ] if !ref($mailto); | |
1448 | ||
1449 | foreach (@$mailto) { | |
1450 | die "illegal character in mailto address\n" | |
1451 | if ($_ =~ $mail_re); | |
1452 | } | |
1453 | ||
1454 | my $rcvrtxt = join (', ', @$mailto); | |
1455 | ||
1456 | $mailfrom = $mailfrom || "root"; | |
1457 | die "illegal character in mailfrom address\n" | |
1458 | if $mailfrom =~ $mail_re; | |
1459 | ||
1460 | $author = $author // 'Proxmox VE'; | |
1461 | ||
1462 | open (MAIL, "|-", "sendmail", "-B", "8BITMIME", "-f", $mailfrom, "--", @$mailto) || | |
1463 | die "unable to open 'sendmail' - $!"; | |
1464 | ||
1465 | my $date = time2str('%a, %d %b %Y %H:%M:%S %z', time()); | |
1466 | ||
1467 | my $is_multipart = $text && $html; | |
1468 | ||
1469 | # multipart spec see https://www.ietf.org/rfc/rfc1521.txt | |
1470 | my $boundary = "----_=_NextPart_001_".int(time).$$; | |
1471 | ||
1472 | if ($subject =~ /[^[:ascii:]]/) { | |
1473 | $subject = Encode::encode('MIME-Header', $subject); | |
1474 | } | |
1475 | ||
1476 | if ($subject =~ /[^[:ascii:]]/ || $is_multipart) { | |
1477 | print MAIL "MIME-Version: 1.0\n"; | |
1478 | } | |
1479 | print MAIL "From: $author <$mailfrom>\n"; | |
1480 | print MAIL "To: $rcvrtxt\n"; | |
1481 | print MAIL "Date: $date\n"; | |
1482 | print MAIL "Subject: $subject\n"; | |
1483 | ||
1484 | if ($is_multipart) { | |
1485 | print MAIL "Content-Type: multipart/alternative;\n"; | |
1486 | print MAIL "\tboundary=\"$boundary\"\n"; | |
1487 | print MAIL "\n"; | |
1488 | print MAIL "This is a multi-part message in MIME format.\n\n"; | |
1489 | print MAIL "--$boundary\n"; | |
1490 | } | |
1491 | ||
1492 | if (defined($text)) { | |
1493 | print MAIL "Content-Type: text/plain;\n"; | |
1494 | print MAIL "\tcharset=\"UTF-8\"\n"; | |
1495 | print MAIL "Content-Transfer-Encoding: 8bit\n"; | |
1496 | print MAIL "\n"; | |
1497 | ||
1498 | # avoid 'remove extra line breaks' issue (MS Outlook) | |
1499 | my $fill = ' '; | |
1500 | $text =~ s/^/$fill/gm; | |
1501 | ||
1502 | print MAIL $text; | |
1503 | ||
1504 | print MAIL "\n--$boundary\n" if $is_multipart; | |
1505 | } | |
1506 | ||
1507 | if (defined($html)) { | |
1508 | print MAIL "Content-Type: text/html;\n"; | |
1509 | print MAIL "\tcharset=\"UTF-8\"\n"; | |
1510 | print MAIL "Content-Transfer-Encoding: 8bit\n"; | |
1511 | print MAIL "\n"; | |
1512 | ||
1513 | print MAIL $html; | |
1514 | ||
1515 | print MAIL "\n--$boundary--\n" if $is_multipart; | |
1516 | } | |
1517 | ||
1518 | close(MAIL); | |
1519 | } | |
1520 | ||
1521 | sub tempfile { | |
1522 | my ($perm, %opts) = @_; | |
1523 | ||
1524 | # default permissions are stricter than with file_set_contents | |
1525 | $perm = 0600 if !defined($perm); | |
1526 | ||
1527 | my $dir = $opts{dir} // '/run'; | |
1528 | my $mode = $opts{mode} // O_RDWR; | |
1529 | $mode |= O_EXCL if !$opts{allow_links}; | |
1530 | ||
1531 | my $fh = IO::File->new($dir, $mode | O_TMPFILE, $perm); | |
1532 | if (!$fh && $! == EOPNOTSUPP) { | |
1533 | $dir = '/tmp' if !defined($opts{dir}); | |
1534 | $dir .= "/.tmpfile.$$"; | |
1535 | $fh = IO::File->new($dir, $mode | O_CREAT | O_EXCL, $perm); | |
1536 | unlink($dir) if $fh; | |
1537 | } | |
1538 | die "failed to create tempfile: $!\n" if !$fh; | |
1539 | return $fh; | |
1540 | } | |
1541 | ||
1542 | sub tempfile_contents { | |
1543 | my ($data, $perm, %opts) = @_; | |
1544 | ||
1545 | my $fh = tempfile($perm, %opts); | |
1546 | eval { | |
1547 | die "unable to write to tempfile: $!\n" if !print {$fh} $data; | |
1548 | die "unable to flush to tempfile: $!\n" if !defined($fh->flush()); | |
1549 | }; | |
1550 | if (my $err = $@) { | |
1551 | close $fh; | |
1552 | die $err; | |
1553 | } | |
1554 | ||
1555 | return ("/proc/$$/fd/".$fh->fileno, $fh); | |
1556 | } | |
1557 | ||
1558 | sub validate_ssh_public_keys { | |
1559 | my ($raw) = @_; | |
1560 | my @lines = split(/\n/, $raw); | |
1561 | ||
1562 | foreach my $line (@lines) { | |
1563 | next if $line =~ m/^\s*$/; | |
1564 | eval { | |
1565 | my ($filename, $handle) = tempfile_contents($line); | |
1566 | run_command(["ssh-keygen", "-l", "-f", $filename], | |
1567 | outfunc => sub {}, errfunc => sub {}); | |
1568 | }; | |
1569 | die "SSH public key validation error\n" if $@; | |
1570 | } | |
1571 | } | |
1572 | ||
1573 | sub openat($$$;$) { | |
1574 | my ($dirfd, $pathname, $flags, $mode) = @_; | |
1575 | my $fd = syscall(PVE::Syscall::openat, $dirfd, $pathname, $flags, $mode//0); | |
1576 | return undef if $fd < 0; | |
1577 | # sysopen() doesn't deal with numeric file descriptors apparently | |
1578 | # so we need to convert to a mode string for IO::Handle->new_from_fd | |
1579 | my $flagstr = ($flags & O_RDWR) ? 'rw' : ($flags & O_WRONLY) ? 'w' : 'r'; | |
1580 | my $handle = IO::Handle->new_from_fd($fd, $flagstr); | |
1581 | return $handle if $handle; | |
1582 | my $err = $!; # save error before closing the raw fd | |
1583 | syscall(PVE::Syscall::close, $fd); # close | |
1584 | $! = $err; | |
1585 | return undef; | |
1586 | } | |
1587 | ||
1588 | sub mkdirat($$$) { | |
1589 | my ($dirfd, $name, $mode) = @_; | |
1590 | return syscall(PVE::Syscall::mkdirat, $dirfd, $name, $mode) == 0; | |
1591 | } | |
1592 | ||
1593 | sub fchownat($$$$$) { | |
1594 | my ($dirfd, $pathname, $owner, $group, $flags) = @_; | |
1595 | return syscall(PVE::Syscall::fchownat, $dirfd, $pathname, $owner, $group, $flags) == 0; | |
1596 | } | |
1597 | ||
1598 | my $salt_starter = time(); | |
1599 | ||
1600 | sub encrypt_pw { | |
1601 | my ($pw) = @_; | |
1602 | ||
1603 | $salt_starter++; | |
1604 | my $salt = substr(Digest::SHA::sha1_base64(time() + $salt_starter + $$), 0, 8); | |
1605 | ||
1606 | # crypt does not want '+' in salt (see 'man crypt') | |
1607 | $salt =~ s/\+/X/g; | |
1608 | ||
1609 | return crypt(encode("utf8", $pw), "\$5\$$salt\$"); | |
1610 | } | |
1611 | ||
1612 | # intended usage: convert_size($val, "kb" => "gb") | |
1613 | # we round up to the next integer by default | |
1614 | # E.g. `convert_size(1023, "b" => "kb")` returns 1 | |
1615 | # use $no_round_up to switch this off, above example would then return 0 | |
1616 | # this is also true for converting down e.g. 0.0005 gb to mb returns 1 | |
1617 | # (0 if $no_round_up is true) | |
1618 | # allowed formats for value: | |
1619 | # 1234 | |
1620 | # 1234. | |
1621 | # 1234.1234 | |
1622 | # .1234 | |
1623 | sub convert_size { | |
1624 | my ($value, $from, $to, $no_round_up) = @_; | |
1625 | ||
1626 | my $units = { | |
1627 | b => 0, | |
1628 | kb => 1, | |
1629 | mb => 2, | |
1630 | gb => 3, | |
1631 | tb => 4, | |
1632 | pb => 5, | |
1633 | }; | |
1634 | ||
1635 | die "no value given" | |
1636 | if !defined($value) || $value eq ""; | |
1637 | ||
1638 | $from = lc($from // ''); $to = lc($to // ''); | |
1639 | die "unknown 'from' and/or 'to' units ($from => $to)" | |
1640 | if !defined($units->{$from}) || !defined($units->{$to}); | |
1641 | ||
1642 | die "value '$value' is not a valid, positive number" | |
1643 | if $value !~ m/^(?:[0-9]+\.?[0-9]*|[0-9]*\.[0-9]+)$/; | |
1644 | ||
1645 | my $shift_amount = ($units->{$from} - $units->{$to}) * 10; | |
1646 | ||
1647 | $value *= 2**$shift_amount; | |
1648 | $value++ if !$no_round_up && ($value - int($value)) > 0.0; | |
1649 | ||
1650 | return int($value); | |
1651 | } | |
1652 | ||
1653 | # uninterruptible readline | |
1654 | # retries on EINTR | |
1655 | sub readline_nointr { | |
1656 | my ($fh) = @_; | |
1657 | my $line; | |
1658 | while (1) { | |
1659 | $line = <$fh>; | |
1660 | last if defined($line) || ($! != EINTR); | |
1661 | } | |
1662 | return $line; | |
1663 | } | |
1664 | ||
1665 | my $host_arch; | |
1666 | sub get_host_arch { | |
1667 | $host_arch = (POSIX::uname())[4] if !$host_arch; | |
1668 | return $host_arch; | |
1669 | } | |
1670 | ||
1671 | # Devices are: [ (12 bits minor) (12 bits major) (8 bits minor) ] | |
1672 | sub dev_t_major($) { | |
1673 | my ($dev_t) = @_; | |
1674 | return (int($dev_t) & 0xfff00) >> 8; | |
1675 | } | |
1676 | ||
1677 | sub dev_t_minor($) { | |
1678 | my ($dev_t) = @_; | |
1679 | $dev_t = int($dev_t); | |
1680 | return (($dev_t >> 12) & 0xfff00) | ($dev_t & 0xff); | |
1681 | } | |
1682 | ||
1683 | # Given an array of array refs [ \[a b c], \[a b b], \[e b a] ] | |
1684 | # Returns the intersection of elements as a single array [a b] | |
1685 | sub array_intersect { | |
1686 | my ($arrays) = @_; | |
1687 | ||
1688 | if (!ref($arrays->[0])) { | |
1689 | $arrays = [ grep { ref($_) eq 'ARRAY' } @_ ]; | |
1690 | } | |
1691 | ||
1692 | return [] if scalar(@$arrays) == 0; | |
1693 | return $arrays->[0] if scalar(@$arrays) == 1; | |
1694 | ||
1695 | my $array_unique = sub { | |
1696 | my %seen = (); | |
1697 | return grep { ! $seen{ $_ }++ } @_; | |
1698 | }; | |
1699 | ||
1700 | # base idea is to get all unique members from the first array, then | |
1701 | # check the common elements with the next (uniquely made) one, only keep | |
1702 | # those. Repeat for every array and at the end we only have those left | |
1703 | # which exist in all arrays | |
1704 | my $return_arr = [ $array_unique->(@{$arrays->[0]}) ]; | |
1705 | for my $i (1 .. $#$arrays) { | |
1706 | my %count = (); | |
1707 | # $return_arr is already unique, explicit at before the loop, implicit below. | |
1708 | foreach my $element (@$return_arr, $array_unique->(@{$arrays->[$i]})) { | |
1709 | $count{$element}++; | |
1710 | } | |
1711 | $return_arr = []; | |
1712 | foreach my $element (keys %count) { | |
1713 | push @$return_arr, $element if $count{$element} > 1; | |
1714 | } | |
1715 | last if scalar(@$return_arr) == 0; # empty intersection, early exit | |
1716 | } | |
1717 | ||
1718 | return $return_arr; | |
1719 | } | |
1720 | ||
1721 | sub open_tree($$$) { | |
1722 | my ($dfd, $pathname, $flags) = @_; | |
1723 | return PVE::Syscall::file_handle_result(syscall( | |
1724 | &PVE::Syscall::open_tree, | |
1725 | $dfd, | |
1726 | $pathname, | |
1727 | $flags, | |
1728 | )); | |
1729 | } | |
1730 | ||
1731 | sub move_mount($$$$$) { | |
1732 | my ($from_dirfd, $from_pathname, $to_dirfd, $to_pathname, $flags) = @_; | |
1733 | return 0 == syscall( | |
1734 | &PVE::Syscall::move_mount, | |
1735 | $from_dirfd, | |
1736 | $from_pathname, | |
1737 | $to_dirfd, | |
1738 | $to_pathname, | |
1739 | $flags, | |
1740 | ); | |
1741 | } | |
1742 | ||
1743 | sub fsopen($$) { | |
1744 | my ($fsname, $flags) = @_; | |
1745 | return PVE::Syscall::file_handle_result(syscall(&PVE::Syscall::fsopen, $fsname, $flags)); | |
1746 | } | |
1747 | ||
1748 | sub fsmount($$$) { | |
1749 | my ($fd, $flags, $mount_attrs) = @_; | |
1750 | return PVE::Syscall::file_handle_result(syscall( | |
1751 | &PVE::Syscall::fsmount, | |
1752 | $fd, | |
1753 | $flags, | |
1754 | $mount_attrs, | |
1755 | )); | |
1756 | } | |
1757 | ||
1758 | sub fspick($$$) { | |
1759 | my ($dirfd, $pathname, $flags) = @_; | |
1760 | return PVE::Syscall::file_handle_result(syscall( | |
1761 | &PVE::Syscall::fspick, | |
1762 | $dirfd, | |
1763 | $pathname, | |
1764 | $flags, | |
1765 | )); | |
1766 | } | |
1767 | ||
1768 | sub fsconfig($$$$$) { | |
1769 | my ($fd, $command, $key, $value, $aux) = @_; | |
1770 | return 0 == syscall(&PVE::Syscall::fsconfig, $fd, $command, $key, $value, $aux); | |
1771 | } | |
1772 | ||
1773 | # "raw" mount, old api, not for generic use (as it does not invoke any helpers). | |
1774 | # use for lower level stuff such as bind/remount/... or simple tmpfs mounts | |
1775 | sub mount($$$$$) { | |
1776 | my ($source, $target, $filesystemtype, $mountflags, $data) = @_; | |
1777 | return 0 == syscall( | |
1778 | &PVE::Syscall::mount, | |
1779 | $source, | |
1780 | $target, | |
1781 | $filesystemtype, | |
1782 | $mountflags, | |
1783 | $data, | |
1784 | ); | |
1785 | } | |
1786 | ||
1787 | sub safe_compare { | |
1788 | my ($left, $right, $cmp) = @_; | |
1789 | ||
1790 | return 0 if !defined($left) && !defined($right); | |
1791 | return -1 if !defined($left); | |
1792 | return 1 if !defined($right); | |
1793 | return $cmp->($left, $right); | |
1794 | } | |
1795 | ||
1796 | 1; |