moved permission check code from REST.pm
[pve-access-control.git] / PVE / RPCEnvironment.pm
CommitLineData
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1package PVE::RPCEnvironment;
2
3use strict;
4use warnings;
8d6e045f 5use POSIX qw(:sys_wait_h EINTR);
b28410fc 6use IO::Handle;
2c3a6c0a 7use IO::File;
b28410fc 8use IO::Select;
2c3a6c0a 9use Fcntl qw(:flock);
37d45deb 10use PVE::Exception qw(raise raise_perm_exc);
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11use PVE::SafeSyslog;
12use PVE::Tools;
13use PVE::INotify;
14use PVE::Cluster;
15use PVE::ProcFSTools;
16use PVE::AccessControl;
7b24102d 17use CGI;
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18
19# we use this singleton class to pass RPC related environment values
20
21my $pve_env;
22
23# save $SIG{CHLD} handler implementation.
24# simply set $SIG{CHLD} = $worker_reaper;
25# and register forked processes with &$register_worker(pid)
26# Note: using $SIG{CHLD} = 'IGNORE' or $SIG{CHLD} = sub { wait (); } or ...
27# has serious side effects, because perls built in system() and open()
28# functions can't get the correct exit status of a child. So we cant use
29# that (also see perlipc)
30
31my $WORKER_PIDS;
32
33my $log_task_result = sub {
34 my ($upid, $user, $status) = @_;
35
36 my $msg = 'successful';
37 my $pri = 'info';
38 if ($status != 0) {
39 my $ec = $status >> 8;
40 my $ic = $status & 255;
41 $msg = $ec ? "failed ($ec)" : "interrupted ($ic)";
42 $pri = 'err';
43 }
44 my $tlist = active_workers($upid);
45 PVE::Cluster::broadcast_tasklist($tlist);
46 my $task;
47 foreach my $t (@$tlist) {
48 if ($t->{upid} eq $upid) {
49 $task = $t;
50 last;
51 }
52 }
53 if ($task && $task->{status}) {
54 $msg = $task->{status};
55 }
56 PVE::Cluster::log_msg($pri, $user, "end task $upid $msg");
57};
58
59my $worker_reaper = sub {
60 local $!; local $?;
61 foreach my $pid (keys %$WORKER_PIDS) {
62 my $waitpid = waitpid ($pid, WNOHANG);
63 if (defined($waitpid) && ($waitpid == $pid)) {
64 my $info = $WORKER_PIDS->{$pid};
65 if ($info && $info->{upid} && $info->{user}) {
66 &$log_task_result($info->{upid}, $info->{user}, $?);
67 }
68 delete ($WORKER_PIDS->{$pid});
69 }
70 }
71};
72
73my $register_worker = sub {
74 my ($pid, $user, $upid) = @_;
75
76 return if !$pid;
77
78 # do not register if already finished
79 my $waitpid = waitpid ($pid, WNOHANG);
80 if (defined($waitpid) && ($waitpid == $pid)) {
81 delete ($WORKER_PIDS->{$pid});
82 return;
83 }
84
85 $WORKER_PIDS->{$pid} = {
86 user => $user,
87 upid => $upid,
88 };
89};
90
91# ACL cache
92
93my $compile_acl = sub {
94 my ($self, $user) = @_;
95
96 my $res = {};
97 my $cfg = $self->{user_cfg};
98
99 return undef if !$cfg->{roles};
100
101 if ($user eq 'root@pam') { # root can do anything
102 return {'/' => $cfg->{roles}->{'Administrator'}};
103 }
104
105 foreach my $path (sort keys %{$cfg->{acl}}) {
106 my @ra = PVE::AccessControl::roles($cfg, $user, $path);
107
108 my $privs = {};
109 foreach my $role (@ra) {
110 if (my $privset = $cfg->{roles}->{$role}) {
111 foreach my $p (keys %$privset) {
112 $privs->{$p} = 1;
113 }
114 }
115 }
116
117 $res->{$path} = $privs;
118 }
119
120 return $res;
121};
122
123sub permissions {
124 my ($self, $user, $path) = @_;
125
126 $user = PVE::AccessControl::verify_username($user, 1);
127 return {} if !$user;
128
129 my $cache = $self->{aclcache};
130
131 my $acl = $cache->{$user};
132
133 if (!$acl) {
134 if (!($acl = &$compile_acl($self, $user))) {
135 return {};
136 }
137 $cache->{$user} = $acl;
138 }
139
140 my $perm;
141
142 if (!($perm = $acl->{$path})) {
143 $perm = {};
144 foreach my $p (sort keys %$acl) {
145 my $final = ($path eq $p);
146
147 next if !(($p eq '/') || $final || ($path =~ m|^$p/|));
148
149 $perm = $acl->{$p};
150 }
151 $acl->{$path} = $perm;
152 }
153
154 return $perm;
155}
156
157sub check {
37d45deb 158 my ($self, $user, $path, $privs, $noerr) = @_;
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159
160 my $perm = $self->permissions($user, $path);
161
162 foreach my $priv (@$privs) {
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163 PVE::AccessControl::verify_privname($priv);
164 if (!$perm->{$priv}) {
165 return undef if $noerr;
166 raise_perm_exc("$path, $priv");
167 }
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168 };
169
170 return 1;
171};
172
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173sub check_any {
174 my ($self, $user, $path, $privs, $noerr) = @_;
175
176 my $perm = $self->permissions($user, $path);
177
178 my $found = 0;
179 foreach my $priv (@$privs) {
180 PVE::AccessControl::verify_privname($priv);
181 if ($perm->{$priv}) {
182 $found = 1;
183 last;
184 }
185 };
186
187 return 1 if $found;
188
189 return undef if $noerr;
190
191 raise_perm_exc("$path, " . join("|", @$privs));
192};
193
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194sub check_user_enabled {
195 my ($self, $user, $noerr) = @_;
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196
197 my $cfg = $self->{user_cfg};
7070c1ae 198 return PVE::AccessControl::check_user_enabled($cfg, $user, $noerr);
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199}
200
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201sub check_user_exist {
202 my ($self, $user, $noerr) = @_;
203
204 my $cfg = $self->{user_cfg};
205 return PVE::AccessControl::check_user_exist($cfg, $user, $noerr);
206}
207
208sub is_group_member {
209 my ($self, $group, $user) = @_;
210
211 my $cfg = $self->{user_cfg};
212
213 return 0 if !$cfg->{groups}->{$group};
214
215 return defined($cfg->{groups}->{$group}->{users}->{$user});
216}
217
218sub filter_groups {
b9180ed2 219 my ($self, $user, $privs, $any) = @_;
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220
221 my $cfg = $self->{user_cfg};
222
223 my $groups = {};
224 foreach my $group (keys %{$cfg->{groups}}) {
b9180ed2 225 my $path = "/access/groups/$group";
37d45deb 226 if ($any) {
b9180ed2 227 if ($self->check_any($user, $path, $privs, 1)) {
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228 $groups->{$group} = $cfg->{groups}->{$group};
229 }
230 } else {
b9180ed2 231 if ($self->check($user, $path, $privs, 1)) {
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232 $groups->{$group} = $cfg->{groups}->{$group};
233 }
234 }
235 }
236
237 return $groups;
238}
239
240sub group_member_join {
241 my ($self, $grouplist) = @_;
242
243 my $users = {};
244
245 my $cfg = $self->{user_cfg};
246 foreach my $group (@$grouplist) {
247 my $data = $cfg->{groups}->{$group};
248 next if !$data;
249 foreach my $user (keys %{$data->{users}}) {
250 $users->{$user} = 1;
251 }
252 }
253
254 return $users;
255}
256
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257sub exec_api2_perm_check {
258 my ($self, $check, $username, $param, $noerr) = @_;
259
260 # syslog("info", "CHECK " . join(', ', @$check));
261
262 my $ind = 0;
263 my $test = $check->[$ind++];
264 die "no permission test specified" if !$test;
265
266 if ($test eq 'and') {
267 while (my $subcheck = $check->[$ind++]) {
268 $self->exec_api2_perm_check($subcheck, $username, $param);
269 }
270 return 1;
271 } elsif ($test eq 'or') {
272 while (my $subcheck = $check->[$ind++]) {
273 return 1 if $self->exec_api2_perm_check($subcheck, $username, $param, 1);
274 }
275 return 0 if $noerr;
276 raise_perm_exc();
277 } elsif ($test eq 'perm') {
278 my ($t, $tmplpath, $privs, %options) = @$check;
279 my $any = $options{any};
280 die "missing parameters" if !($tmplpath && $privs);
281 my $path = PVE::Tools::template_replace($tmplpath, $param);
282 if ($any) {
283 return $self->check_any($username, $path, $privs, $noerr);
284 } else {
285 return $self->check($username, $path, $privs, $noerr);
286 }
287 } elsif ($test eq 'userid-group') {
288 my $userid = $param->{userid};
289 my ($t, $privs, %options) = @$check;
290 return if !$options{groups_param} && !$self->check_user_exist($userid, $noerr);
291 if (!$self->check_any($username, "/access", $privs, 1)) {
292 my $groups = $self->filter_groups($username, $privs, 1);
293 if ($options{groups_param}) {
294 my @group_param = PVE::Tools::split_list($param->{groups});
295 raise_perm_exc("/access, " . join("|", @$privs)) if !scalar(@group_param);
296 foreach my $pg (@group_param) {
297 raise_perm_exc("/access/groups/$pg, " . join("|", @$privs))
298 if !$groups->{$pg};
299 }
300 } else {
301 my $allowed_users = $self->group_member_join([keys %$groups]);
302 if (!$allowed_users->{$userid}) {
303 return 0 if $noerr;
304 raise_perm_exc();
305 }
306 }
307 }
308 return 1;
309 } elsif ($test eq 'userid-param') {
310 my $userid = $param->{userid};
311 return if !$self->check_user_exist($userid, $noerr);
312 my ($t, $subtest) = @$check;
313 die "missing parameters" if !$subtest;
314 if ($subtest eq 'self') {
315 return 1 if $username eq 'userid';
316 return 0 if $noerr;
317 raise_perm_exc();
318 } else {
319 die "unknown userid-param test";
320 }
321 } else {
322 die "unknown permission test";
323 }
324};
325
326sub check_api2_permissions {
327 my ($self, $perm, $username, $param) = @_;
328
329 return 1 if !$username && $perm->{user} eq 'world';
330
331 raise_perm_exc("user != null") if !$username;
332
333 return 1 if $username eq 'root@pam';
334
335 raise_perm_exc('user != root@pam') if !$perm;
336
337 return 1 if $perm->{user} && $perm->{user} eq 'all';
338
339 return $self->exec_api2_perm_check($perm->{check}, $username, $param)
340 if $perm->{check};
341
342 raise_perm_exc();
343}
344
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345# initialize environment - must be called once at program startup
346sub init {
347 my ($class, $type, %params) = @_;
348
349 $class = ref($class) || $class;
350
351 die "already initialized" if $pve_env;
352
e42eedbc 353 die "unknown environment type" if !$type || $type !~ m/^(cli|pub|priv|ha)$/;
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354
355 $SIG{CHLD} = $worker_reaper;
356
357 # environment types
358 # cli ... command started fron command line
359 # pub ... access from public server (apache)
360 # priv ... access from private server (pvedaemon)
e42eedbc 361 # ha ... access from HA resource manager agent (rgmanager)
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362
363 my $self = {
364 user_cfg => {},
365 aclcache => {},
366 aclversion => undef,
367 type => $type,
368 };
369
370 bless $self, $class;
371
372 foreach my $p (keys %params) {
373 if ($p eq 'atfork') {
374 $self->{$p} = $params{$p};
375 } else {
376 die "unknown option '$p'";
377 }
378 }
379
380 $pve_env = $self;
381
382 my ($sysname, $nodename) = POSIX::uname();
383
384 $nodename =~ s/\..*$//; # strip domain part, if any
385
386 $self->{nodename} = $nodename;
387
388 return $self;
389};
390
391# get the singleton
392sub get {
393
394 die "not initialized" if !$pve_env;
395
396 return $pve_env;
397}
398
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399sub parse_params {
400 my ($self, $enable_upload) = @_;
401
402 if ($self->{request_rec}) {
403 my $cgi;
404 if ($enable_upload) {
405 $cgi = CGI->new($self->{request_rec});
406 } else {
407 # disable upload using empty upload_hook
408 $cgi = CGI->new($self->{request_rec}, sub {}, undef, 0);
409 }
410 $self->{cgi} = $cgi;
411 my $params = $cgi->Vars();
76c377c1 412 return PVE::Tools::decode_utf8_parameters($params);
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413 } elsif ($self->{params}) {
414 return $self->{params};
415 } else {
416 die "no parameters registered";
417 }
418}
419
420sub get_upload_info {
421 my ($self, $param) = @_;
422
423 my $cgi = $self->{cgi};
424 die "CGI not initialized" if !$cgi;
425
426 my $pd = $cgi->param($param);
427 die "unable to get cgi parameter info\n" if !$pd;
428 my $info = $cgi->uploadInfo($pd);
429 die "unable to get cgi upload info\n" if !$info;
430
431 my $res = { %$info };
432
433 my $tmpfilename = $cgi->tmpFileName($pd);
434 die "unable to get cgi upload file name\n" if !$tmpfilename;
435 $res->{tmpfilename} = $tmpfilename;
436
437 #my $hndl = $cgi->upload($param);
438 #die "unable to get cgi upload handle\n" if !$hndl;
439 #$res->{handle} = $hndl->handle;
440
441 return $res;
442}
443
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444# init_request - must be called before each RPC request
445sub init_request {
446 my ($self, %params) = @_;
447
448 PVE::Cluster::cfs_update();
449
be6ea723 450 $self->{result_attributes} = {};
272fe9ff 451
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452 my $userconfig; # we use this for regression tests
453 foreach my $p (keys %params) {
454 if ($p eq 'userconfig') {
455 $userconfig = $params{$p};
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456 } elsif ($p eq 'request_rec') {
457 # pass Apache2::RequestRec
458 $self->{request_rec} = $params{$p};
459 } elsif ($p eq 'params') {
460 $self->{params} = $params{$p};
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461 } else {
462 die "unknown parameter '$p'";
463 }
464 }
465
466 eval {
467 $self->{aclcache} = {};
468 if ($userconfig) {
469 my $ucdata = PVE::Tools::file_get_contents($userconfig);
470 my $cfg = PVE::AccessControl::parse_user_config($userconfig, $ucdata);
471 $self->{user_cfg} = $cfg;
472 } else {
473 my $ucvers = PVE::Cluster::cfs_file_version('user.cfg');
474 if (!$self->{aclcache} || !defined($self->{aclversion}) ||
475 !defined($ucvers) || ($ucvers ne $self->{aclversion})) {
476 $self->{aclversion} = $ucvers;
477 my $cfg = PVE::Cluster::cfs_read_file('user.cfg');
478 $self->{user_cfg} = $cfg;
479 }
480 }
481 };
482 if (my $err = $@) {
483 $self->{user_cfg} = {};
484 die "Unable to load access control list: $err";
485 }
486}
487
488sub set_client_ip {
489 my ($self, $ip) = @_;
490
491 $self->{client_ip} = $ip;
492}
493
494sub get_client_ip {
495 my ($self) = @_;
496
497 return $self->{client_ip};
498}
499
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500sub set_result_attrib {
501 my ($self, $key, $value) = @_;
2c3a6c0a 502
be6ea723 503 $self->{result_attributes}->{$key} = $value;
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504}
505
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506sub get_result_attrib {
507 my ($self, $key) = @_;
272fe9ff 508
be6ea723 509 return $self->{result_attributes}->{$key};
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510}
511
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512sub set_language {
513 my ($self, $lang) = @_;
514
515 # fixme: initialize I18N
516
517 $self->{language} = $lang;
518}
519
520sub get_language {
521 my ($self) = @_;
522
523 return $self->{language};
524}
525
526sub set_user {
527 my ($self, $user) = @_;
528
529 # fixme: get ACLs
530
531 $self->{user} = $user;
532}
533
534sub get_user {
535 my ($self) = @_;
536
537 die "user name not set\n" if !$self->{user};
538
539 return $self->{user};
540}
541
542# read/update list of active workers
543# we move all finished tasks to the archive index,
544# but keep aktive and most recent task in the active file.
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545# $nocheck ... consider $new_upid still running (avoid that
546# we try to read the reult to early.
2c3a6c0a 547sub active_workers {
5bf71a96 548 my ($new_upid, $nocheck) = @_;
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549
550 my $lkfn = "/var/log/pve/tasks/.active.lock";
551
552 my $timeout = 10;
553
554 my $code = sub {
555
556 my $tasklist = PVE::INotify::read_file('active');
557
558 my @ta;
559 my $tlist = [];
560 my $thash = {}; # only list task once
561
562 my $check_task = sub {
d33d0735 563 my ($task, $running) = @_;
2c3a6c0a 564
d33d0735 565 if ($running || PVE::ProcFSTools::check_process_running($task->{pid}, $task->{pstart})) {
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566 push @$tlist, $task;
567 } else {
568 delete $task->{pid};
569 push @ta, $task;
570 }
571 delete $task->{pstart};
572 };
573
574 foreach my $task (@$tasklist) {
575 my $upid = $task->{upid};
576 next if $thash->{$upid};
577 $thash->{$upid} = $task;
578 &$check_task($task);
579 }
580
581 if ($new_upid && !(my $task = $thash->{$new_upid})) {
582 $task = PVE::Tools::upid_decode($new_upid);
583 $task->{upid} = $new_upid;
584 $thash->{$new_upid} = $task;
d33d0735 585 &$check_task($task, $nocheck);
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586 }
587
588
589 @ta = sort { $b->{starttime} cmp $a->{starttime} } @ta;
590
591 my $save = defined($new_upid);
592
593 foreach my $task (@ta) {
594 next if $task->{endtime};
595 $task->{endtime} = time();
596 $task->{status} = PVE::Tools::upid_read_status($task->{upid});
597 $save = 1;
598 }
599
600 my $archive = '';
601 my @arlist = ();
602 foreach my $task (@ta) {
603 if (!$task->{saved}) {
604 $archive .= sprintf("$task->{upid} %08X $task->{status}\n", $task->{endtime});
605 $save = 1;
606 push @arlist, $task;
607 $task->{saved} = 1;
608 }
609 }
610
611 if ($archive) {
612 my $size = 0;
613 my $filename = "/var/log/pve/tasks/index";
614 eval {
615 my $fh = IO::File->new($filename, '>>', 0644) ||
616 die "unable to open file '$filename' - $!\n";
617 PVE::Tools::safe_print($filename, $fh, $archive);
618 $size = -s $fh;
619 close($fh) ||
620 die "unable to close file '$filename' - $!\n";
621 };
622 my $err = $@;
623 if ($err) {
624 syslog('err', $err);
625 foreach my $task (@arlist) { # mark as not saved
626 $task->{saved} = 0;
627 }
628 }
629 my $maxsize = 50000; # about 1000 entries
630 if ($size > $maxsize) {
631 rename($filename, "$filename.1");
632 }
633 }
634
635 # we try to reduce the amount of data
636 # list all running tasks and task and a few others
637 # try to limit to 25 tasks
638 my $ctime = time();
639 my $max = 25 - scalar(@$tlist);
640 foreach my $task (@ta) {
641 last if $max <= 0;
642 push @$tlist, $task;
643 $max--;
644 }
645
646 PVE::INotify::write_file('active', $tlist) if $save;
647
648 return $tlist;
649 };
650
651 my $res = PVE::Tools::lock_file($lkfn, $timeout, $code);
652 die $@ if $@;
653
654 return $res;
655}
656
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657my $kill_process_group = sub {
658 my ($pid, $pstart) = @_;
659
660 # send kill to process group (negative pid)
661 my $kpid = -$pid;
662
663 # always send signal to all pgrp members
664 kill(15, $kpid); # send TERM signal
665
666 # give max 5 seconds to shut down
667 for (my $i = 0; $i < 5; $i++) {
668 return if !PVE::ProcFSTools::check_process_running($pid, $pstart);
669 sleep (1);
670 }
671
672 # to be sure
673 kill(9, $kpid);
674};
675
676sub check_worker {
677 my ($upid, $killit) = @_;
678
679 my $task = PVE::Tools::upid_decode($upid);
680
681 my $running = PVE::ProcFSTools::check_process_running($task->{pid}, $task->{pstart});
682
683 return 0 if !$running;
684
685 if ($killit) {
686 &$kill_process_group($task->{pid});
687 return 0;
688 }
689
690 return 1;
691}
692
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693# start long running workers
694# STDIN is redirected to /dev/null
695# STDOUT,STDERR are redirected to the filename returned by upid_decode
696# NOTE: we simulate running in foreground if ($self->{type} eq 'cli')
697sub fork_worker {
698 my ($self, $dtype, $id, $user, $function) = @_;
699
700 $dtype = 'unknown' if !defined ($dtype);
701 $id = '' if !defined ($id);
702
703 $user = 'root@pve' if !defined ($user);
704
705 my $sync = $self->{type} eq 'cli' ? 1 : 0;
706
707 local $SIG{INT} =
708 local $SIG{QUIT} =
709 local $SIG{PIPE} =
710 local $SIG{TERM} = 'IGNORE';
711
712 my $starttime = time ();
713
714 my @psync = POSIX::pipe();
715 my @csync = POSIX::pipe();
716
717 my $node = $self->{nodename};
718
719 my $cpid = fork();
720 die "unable to fork worker - $!" if !defined($cpid);
721
722 my $workerpuid = $cpid ? $cpid : $$;
723
724 my $pstart = PVE::ProcFSTools::read_proc_starttime($workerpuid) ||
725 die "unable to read process start time";
726
727 my $upid = PVE::Tools::upid_encode ({
728 node => $node, pid => $workerpuid, pstart => $pstart,
729 starttime => $starttime, type => $dtype, id => $id, user => $user });
730
731 my $outfh;
732
733 if (!$cpid) { # child
734
735 $0 = "task $upid";
736
737 $SIG{INT} = $SIG{QUIT} = $SIG{TERM} = sub { die "received interrupt\n"; };
738
739 $SIG{CHLD} = $SIG{PIPE} = 'DEFAULT';
740
741 # set sess/process group - we want to be able to kill the
742 # whole process group
743 POSIX::setsid();
744
745 POSIX::close ($psync[0]);
746 POSIX::close ($csync[1]);
747
748 $outfh = $sync ? $psync[1] : undef;
749
750 eval {
751 PVE::INotify::inotify_close();
752
753 if (my $atfork = $self->{atfork}) {
754 &$atfork();
755 }
756
757 # same algorythm as used inside SA
758 # STDIN = /dev/null
759 my $fd = fileno (STDIN);
2c3a6c0a 760
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761 if (!$sync) {
762 close STDIN;
763 POSIX::close(0) if $fd != 0;
764
765 die "unable to redirect STDIN - $!"
766 if !open(STDIN, "</dev/null");
767
768 $outfh = PVE::Tools::upid_open($upid);
769 }
2c3a6c0a 770
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771
772 # redirect STDOUT
773 $fd = fileno(STDOUT);
774 close STDOUT;
775 POSIX::close (1) if $fd != 1;
776
777 die "unable to redirect STDOUT - $!"
778 if !open(STDOUT, ">&", $outfh);
779
780 STDOUT->autoflush (1);
781
782 # redirect STDERR to STDOUT
783 $fd = fileno (STDERR);
784 close STDERR;
785 POSIX::close(2) if $fd != 2;
786
787 die "unable to redirect STDERR - $!"
788 if !open(STDERR, ">&1");
789
790 STDERR->autoflush(1);
791 };
792 if (my $err = $@) {
793 my $msg = "ERROR: $err";
794 POSIX::write($psync[1], $msg, length ($msg));
795 POSIX::close($psync[1]);
796 POSIX::_exit(1);
b9e47e57 797 kill(-9, $$);
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798 }
799
f6f2d51f 800 # sync with parent (signal that we are ready)
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801 if ($sync) {
802 print "$upid\n";
803 } else {
804 POSIX::write($psync[1], $upid, length ($upid));
805 POSIX::close($psync[1]);
806 }
807
808 my $readbuf = '';
809 # sync with parent (wait until parent is ready)
810 POSIX::read($csync[0], $readbuf, 4096);
811 die "parent setup error\n" if $readbuf ne 'OK';
812
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813 if ($self->{type} eq 'ha') {
814 print "task started by HA resource agent\n";
815 }
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816 eval { &$function($upid); };
817 my $err = $@;
818 if ($err) {
819 chomp $err;
820 $err =~ s/\n/ /mg;
821 syslog('err', $err);
822 print STDERR "TASK ERROR: $err\n";
823 POSIX::_exit(-1);
824 } else {
825 print STDERR "TASK OK\n";
b9e47e57 826 POSIX::_exit(0);
2c3a6c0a 827 }
b9e47e57 828 kill(-9, $$);
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829 }
830
831 # parent
832
833 POSIX::close ($psync[1]);
834 POSIX::close ($csync[0]);
835
836 my $readbuf = '';
837 # sync with child (wait until child starts)
838 POSIX::read($psync[0], $readbuf, 4096);
839
840 if (!$sync) {
841 POSIX::close($psync[0]);
842 &$register_worker($cpid, $user, $upid);
843 } else {
844 chomp $readbuf;
845 }
846
847 eval {
848 die "got no worker upid - start worker failed\n" if !$readbuf;
849
850 if ($readbuf =~ m/^ERROR:\s*(.+)$/m) {
851 die "starting worker failed: $1\n";
852 }
853
854 if ($readbuf ne $upid) {
855 die "got strange worker upid ('$readbuf' != '$upid') - start worker failed\n";
856 }
857
858 if ($sync) {
859 $outfh = PVE::Tools::upid_open($upid);
860 }
861 };
862 my $err = $@;
863
864 if (!$err) {
865 my $msg = 'OK';
866 POSIX::write($csync[1], $msg, length ($msg));
867 POSIX::close($csync[1]);
868
869 } else {
870 POSIX::close($csync[1]);
b9e47e57 871 kill(-9, $cpid); # make sure it gets killed
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872 die $err;
873 }
874
875 PVE::Cluster::log_msg('info', $user, "starting task $upid");
876
5bf71a96 877 my $tlist = active_workers($upid, $sync);
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878 PVE::Cluster::broadcast_tasklist($tlist);
879
880 my $res = 0;
881
882 if ($sync) {
883 my $count;
884 my $outbuf = '';
8d6e045f 885 my $int_count = 0;
2c3a6c0a 886 eval {
8d6e045f 887 local $SIG{INT} = local $SIG{QUIT} = local $SIG{TERM} = sub {
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888 # always send signal to all pgrp members
889 my $kpid = -$cpid;
8d6e045f 890 if ($int_count < 3) {
527b2e7a 891 kill(15, $kpid); # send TERM signal
8d6e045f 892 } else {
527b2e7a 893 kill(9, $kpid); # send KILL signal
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894 }
895 $int_count++;
896 };
2c3a6c0a 897 local $SIG{PIPE} = sub { die "broken pipe\n"; };
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898
899 my $select = new IO::Select;
900 my $fh = IO::Handle->new_from_fd($psync[0], 'r');
901 $select->add($fh);
902
903 while ($select->count) {
904 my @handles = $select->can_read(1);
905 if (scalar(@handles)) {
906 my $count = sysread ($handles[0], $readbuf, 4096);
907 if (!defined ($count)) {
908 my $err = $!;
909 die "sync pipe read error: $err\n";
2c3a6c0a 910 }
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911 last if $count == 0; # eof
912
913 $outbuf .= $readbuf;
914 while ($outbuf =~ s/^(([^\010\r\n]*)(\r|\n|(\010)+|\r\n))//s) {
915 my $line = $1;
916 my $data = $2;
917 if ($data =~ m/^TASK OK$/) {
918 # skip
919 } elsif ($data =~ m/^TASK ERROR: (.+)$/) {
920 print STDERR "$1\n";
921 } else {
922 print $line;
923 }
924 if ($outfh) {
925 print $outfh $line;
926 $outfh->flush();
927 }
2c3a6c0a 928 }
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929 } else {
930 # some commands daemonize without closing stdout
931 last if !PVE::ProcFSTools::check_process_running($cpid);
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932 }
933 }
934 };
935 my $err = $@;
936
937 POSIX::close($psync[0]);
938
939 if ($outbuf) { # just to be sure
940 print $outbuf;
941 if ($outfh) {
942 print $outfh $outbuf;
943 }
944 }
945
946 if ($err) {
947 $err =~ s/\n/ /mg;
948 print STDERR "$err\n";
949 if ($outfh) {
950 print $outfh "TASK ERROR: $err\n";
951 }
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952 }
953
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954 &$kill_process_group($cpid, $pstart); # make sure it gets killed
955
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956 close($outfh);
957
b9e47e57 958 waitpid($cpid, 0);
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959 $res = $?;
960 &$log_task_result($upid, $user, $res);
961 }
962
963 return wantarray ? ($upid, $res) : $upid;
964}
965
9661;