* apt-pkg/deb/dpkgpm.cc:
[ntk/apt.git] / apt-pkg / deb / dpkgpm.cc
1 // -*- mode: cpp; mode: fold -*-
2 // Description /*{{{*/
3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
4 /* ######################################################################
5
6 DPKG Package Manager - Provide an interface to dpkg
7
8 ##################################################################### */
9 /*}}}*/
10 // Includes /*{{{*/
11 #include <apt-pkg/dpkgpm.h>
12 #include <apt-pkg/error.h>
13 #include <apt-pkg/configuration.h>
14 #include <apt-pkg/depcache.h>
15 #include <apt-pkg/strutl.h>
16 #include <apti18n.h>
17 #include <apt-pkg/fileutl.h>
18
19 #include <unistd.h>
20 #include <stdlib.h>
21 #include <fcntl.h>
22 #include <sys/select.h>
23 #include <sys/types.h>
24 #include <sys/wait.h>
25 #include <signal.h>
26 #include <errno.h>
27 #include <stdio.h>
28 #include <string.h>
29 #include <algorithm>
30 #include <sstream>
31 #include <map>
32
33 #include <termios.h>
34 #include <unistd.h>
35 #include <sys/ioctl.h>
36 #include <pty.h>
37
38 #include <config.h>
39 #include <apti18n.h>
40 /*}}}*/
41
42 using namespace std;
43
44 namespace
45 {
46 // Maps the dpkg "processing" info to human readable names. Entry 0
47 // of each array is the key, entry 1 is the value.
48 const std::pair<const char *, const char *> PackageProcessingOps[] = {
49 std::make_pair("install", N_("Installing %s")),
50 std::make_pair("configure", N_("Configuring %s")),
51 std::make_pair("remove", N_("Removing %s")),
52 std::make_pair("trigproc", N_("Running post-installation trigger %s"))
53 };
54
55 const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
56 const std::pair<const char *, const char *> * const PackageProcessingOpsEnd = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
57
58 // Predicate to test whether an entry in the PackageProcessingOps
59 // array matches a string.
60 class MatchProcessingOp
61 {
62 const char *target;
63
64 public:
65 MatchProcessingOp(const char *the_target)
66 : target(the_target)
67 {
68 }
69
70 bool operator()(const std::pair<const char *, const char *> &pair) const
71 {
72 return strcmp(pair.first, target) == 0;
73 }
74 };
75 }
76
77 /* helper function to ionice the given PID
78
79 there is no C header for ionice yet - just the syscall interface
80 so we use the binary from util-linux
81 */
82 static bool
83 ionice(int PID)
84 {
85 if (!FileExists("/usr/bin/ionice"))
86 return false;
87 pid_t Process = ExecFork();
88 if (Process == 0)
89 {
90 char buf[32];
91 snprintf(buf, sizeof(buf), "-p%d", PID);
92 const char *Args[4];
93 Args[0] = "/usr/bin/ionice";
94 Args[1] = "-c3";
95 Args[2] = buf;
96 Args[3] = 0;
97 execv(Args[0], (char **)Args);
98 }
99 return ExecWait(Process, "ionice");
100 }
101
102 // DPkgPM::pkgDPkgPM - Constructor /*{{{*/
103 // ---------------------------------------------------------------------
104 /* */
105 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
106 : pkgPackageManager(Cache), dpkgbuf_pos(0),
107 term_out(NULL), PackagesDone(0), PackagesTotal(0)
108 {
109 }
110 /*}}}*/
111 // DPkgPM::pkgDPkgPM - Destructor /*{{{*/
112 // ---------------------------------------------------------------------
113 /* */
114 pkgDPkgPM::~pkgDPkgPM()
115 {
116 }
117 /*}}}*/
118 // DPkgPM::Install - Install a package /*{{{*/
119 // ---------------------------------------------------------------------
120 /* Add an install operation to the sequence list */
121 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
122 {
123 if (File.empty() == true || Pkg.end() == true)
124 return _error->Error("Internal Error, No file name for %s",Pkg.Name());
125
126 List.push_back(Item(Item::Install,Pkg,File));
127 return true;
128 }
129 /*}}}*/
130 // DPkgPM::Configure - Configure a package /*{{{*/
131 // ---------------------------------------------------------------------
132 /* Add a configure operation to the sequence list */
133 bool pkgDPkgPM::Configure(PkgIterator Pkg)
134 {
135 if (Pkg.end() == true)
136 return false;
137
138 List.push_back(Item(Item::Configure,Pkg));
139 return true;
140 }
141 /*}}}*/
142 // DPkgPM::Remove - Remove a package /*{{{*/
143 // ---------------------------------------------------------------------
144 /* Add a remove operation to the sequence list */
145 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
146 {
147 if (Pkg.end() == true)
148 return false;
149
150 if (Purge == true)
151 List.push_back(Item(Item::Purge,Pkg));
152 else
153 List.push_back(Item(Item::Remove,Pkg));
154 return true;
155 }
156 /*}}}*/
157 // DPkgPM::SendV2Pkgs - Send version 2 package info /*{{{*/
158 // ---------------------------------------------------------------------
159 /* This is part of the helper script communication interface, it sends
160 very complete information down to the other end of the pipe.*/
161 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
162 {
163 fprintf(F,"VERSION 2\n");
164
165 /* Write out all of the configuration directives by walking the
166 configuration tree */
167 const Configuration::Item *Top = _config->Tree(0);
168 for (; Top != 0;)
169 {
170 if (Top->Value.empty() == false)
171 {
172 fprintf(F,"%s=%s\n",
173 QuoteString(Top->FullTag(),"=\"\n").c_str(),
174 QuoteString(Top->Value,"\n").c_str());
175 }
176
177 if (Top->Child != 0)
178 {
179 Top = Top->Child;
180 continue;
181 }
182
183 while (Top != 0 && Top->Next == 0)
184 Top = Top->Parent;
185 if (Top != 0)
186 Top = Top->Next;
187 }
188 fprintf(F,"\n");
189
190 // Write out the package actions in order.
191 for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
192 {
193 pkgDepCache::StateCache &S = Cache[I->Pkg];
194
195 fprintf(F,"%s ",I->Pkg.Name());
196 // Current version
197 if (I->Pkg->CurrentVer == 0)
198 fprintf(F,"- ");
199 else
200 fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
201
202 // Show the compare operator
203 // Target version
204 if (S.InstallVer != 0)
205 {
206 int Comp = 2;
207 if (I->Pkg->CurrentVer != 0)
208 Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
209 if (Comp < 0)
210 fprintf(F,"> ");
211 if (Comp == 0)
212 fprintf(F,"= ");
213 if (Comp > 0)
214 fprintf(F,"< ");
215 fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
216 }
217 else
218 fprintf(F,"> - ");
219
220 // Show the filename/operation
221 if (I->Op == Item::Install)
222 {
223 // No errors here..
224 if (I->File[0] != '/')
225 fprintf(F,"**ERROR**\n");
226 else
227 fprintf(F,"%s\n",I->File.c_str());
228 }
229 if (I->Op == Item::Configure)
230 fprintf(F,"**CONFIGURE**\n");
231 if (I->Op == Item::Remove ||
232 I->Op == Item::Purge)
233 fprintf(F,"**REMOVE**\n");
234
235 if (ferror(F) != 0)
236 return false;
237 }
238 return true;
239 }
240 /*}}}*/
241 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
242 // ---------------------------------------------------------------------
243 /* This looks for a list of scripts to run from the configuration file
244 each one is run and is fed on standard input a list of all .deb files
245 that are due to be installed. */
246 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
247 {
248 Configuration::Item const *Opts = _config->Tree(Cnf);
249 if (Opts == 0 || Opts->Child == 0)
250 return true;
251 Opts = Opts->Child;
252
253 unsigned int Count = 1;
254 for (; Opts != 0; Opts = Opts->Next, Count++)
255 {
256 if (Opts->Value.empty() == true)
257 continue;
258
259 // Determine the protocol version
260 string OptSec = Opts->Value;
261 string::size_type Pos;
262 if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
263 Pos = OptSec.length();
264 OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
265
266 unsigned int Version = _config->FindI(OptSec+"::Version",1);
267
268 // Create the pipes
269 int Pipes[2];
270 if (pipe(Pipes) != 0)
271 return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
272 SetCloseExec(Pipes[0],true);
273 SetCloseExec(Pipes[1],true);
274
275 // Purified Fork for running the script
276 pid_t Process = ExecFork();
277 if (Process == 0)
278 {
279 // Setup the FDs
280 dup2(Pipes[0],STDIN_FILENO);
281 SetCloseExec(STDOUT_FILENO,false);
282 SetCloseExec(STDIN_FILENO,false);
283 SetCloseExec(STDERR_FILENO,false);
284
285 const char *Args[4];
286 Args[0] = "/bin/sh";
287 Args[1] = "-c";
288 Args[2] = Opts->Value.c_str();
289 Args[3] = 0;
290 execv(Args[0],(char **)Args);
291 _exit(100);
292 }
293 close(Pipes[0]);
294 FILE *F = fdopen(Pipes[1],"w");
295 if (F == 0)
296 return _error->Errno("fdopen","Faild to open new FD");
297
298 // Feed it the filenames.
299 bool Die = false;
300 if (Version <= 1)
301 {
302 for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
303 {
304 // Only deal with packages to be installed from .deb
305 if (I->Op != Item::Install)
306 continue;
307
308 // No errors here..
309 if (I->File[0] != '/')
310 continue;
311
312 /* Feed the filename of each package that is pending install
313 into the pipe. */
314 fprintf(F,"%s\n",I->File.c_str());
315 if (ferror(F) != 0)
316 {
317 Die = true;
318 break;
319 }
320 }
321 }
322 else
323 Die = !SendV2Pkgs(F);
324
325 fclose(F);
326
327 // Clean up the sub process
328 if (ExecWait(Process,Opts->Value.c_str()) == false)
329 return _error->Error("Failure running script %s",Opts->Value.c_str());
330 }
331
332 return true;
333 }
334
335 /*}}}*/
336 // DPkgPM::DoStdin - Read stdin and pass to slave pty /*{{{*/
337 // ---------------------------------------------------------------------
338 /*
339 */
340 void pkgDPkgPM::DoStdin(int master)
341 {
342 unsigned char input_buf[256] = {0,};
343 ssize_t len = read(0, input_buf, sizeof(input_buf));
344 if (len)
345 write(master, input_buf, len);
346 else
347 stdin_is_dev_null = true;
348 }
349 /*}}}*/
350 // DPkgPM::DoTerminalPty - Read the terminal pty and write log /*{{{*/
351 // ---------------------------------------------------------------------
352 /*
353 * read the terminal pty and write log
354 */
355 void pkgDPkgPM::DoTerminalPty(int master)
356 {
357 unsigned char term_buf[1024] = {0,0, };
358
359 ssize_t len=read(master, term_buf, sizeof(term_buf));
360 if(len == -1 && errno == EIO)
361 {
362 // this happens when the child is about to exit, we
363 // give it time to actually exit, otherwise we run
364 // into a race
365 usleep(500000);
366 return;
367 }
368 if(len <= 0)
369 return;
370 write(1, term_buf, len);
371 if(term_out)
372 fwrite(term_buf, len, sizeof(char), term_out);
373 }
374 /*}}}*/
375 // DPkgPM::ProcessDpkgStatusBuf /*{{{*/
376 // ---------------------------------------------------------------------
377 /*
378 */
379 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
380 {
381 // the status we output
382 ostringstream status;
383
384 if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
385 std::clog << "got from dpkg '" << line << "'" << std::endl;
386
387
388 /* dpkg sends strings like this:
389 'status: <pkg>: <pkg qstate>'
390 errors look like this:
391 'status: /var/cache/apt/archives/krecipes_0.8.1-0ubuntu1_i386.deb : error : trying to overwrite `/usr/share/doc/kde/HTML/en/krecipes/krectip.png', which is also in package krecipes-data
392 and conffile-prompt like this
393 'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
394
395 Newer versions of dpkg sent also:
396 'processing: install: pkg'
397 'processing: configure: pkg'
398 'processing: remove: pkg'
399 'processing: trigproc: trigger'
400
401 */
402 char* list[5];
403 // dpkg sends multiline error messages sometimes (see
404 // #374195 for a example. we should support this by
405 // either patching dpkg to not send multiline over the
406 // statusfd or by rewriting the code here to deal with
407 // it. for now we just ignore it and not crash
408 TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
409 if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
410 {
411 if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
412 std::clog << "ignoring line: not enough ':'" << std::endl;
413 return;
414 }
415 char *pkg = list[1];
416 char *action = _strstrip(list[2]);
417
418 // 'processing' from dpkg looks like
419 // 'processing: action: pkg'
420 if(strncmp(list[0], "processing", strlen("processing")) == 0)
421 {
422 char s[200];
423 char *pkg_or_trigger = _strstrip(list[2]);
424 action =_strstrip( list[1]);
425 const std::pair<const char *, const char *> * const iter =
426 std::find_if(PackageProcessingOpsBegin,
427 PackageProcessingOpsEnd,
428 MatchProcessingOp(action));
429 if(iter == PackageProcessingOpsEnd)
430 {
431 if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
432 std::clog << "ignoring unknwon action: " << action << std::endl;
433 return;
434 }
435 snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
436
437 status << "pmstatus:" << pkg_or_trigger
438 << ":" << (PackagesDone/float(PackagesTotal)*100.0)
439 << ":" << s
440 << endl;
441 if(OutStatusFd > 0)
442 write(OutStatusFd, status.str().c_str(), status.str().size());
443 if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
444 std::clog << "send: '" << status.str() << "'" << endl;
445 return;
446 }
447
448 if(strncmp(action,"error",strlen("error")) == 0)
449 {
450 status << "pmerror:" << list[1]
451 << ":" << (PackagesDone/float(PackagesTotal)*100.0)
452 << ":" << list[3]
453 << endl;
454 if(OutStatusFd > 0)
455 write(OutStatusFd, status.str().c_str(), status.str().size());
456 if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
457 std::clog << "send: '" << status.str() << "'" << endl;
458 return;
459 }
460 if(strncmp(action,"conffile",strlen("conffile")) == 0)
461 {
462 status << "pmconffile:" << list[1]
463 << ":" << (PackagesDone/float(PackagesTotal)*100.0)
464 << ":" << list[3]
465 << endl;
466 if(OutStatusFd > 0)
467 write(OutStatusFd, status.str().c_str(), status.str().size());
468 if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
469 std::clog << "send: '" << status.str() << "'" << endl;
470 return;
471 }
472
473 vector<struct DpkgState> &states = PackageOps[pkg];
474 const char *next_action = NULL;
475 if(PackageOpsDone[pkg] < states.size())
476 next_action = states[PackageOpsDone[pkg]].state;
477 // check if the package moved to the next dpkg state
478 if(next_action && (strcmp(action, next_action) == 0))
479 {
480 // only read the translation if there is actually a next
481 // action
482 const char *translation = _(states[PackageOpsDone[pkg]].str);
483 char s[200];
484 snprintf(s, sizeof(s), translation, pkg);
485
486 // we moved from one dpkg state to a new one, report that
487 PackageOpsDone[pkg]++;
488 PackagesDone++;
489 // build the status str
490 status << "pmstatus:" << pkg
491 << ":" << (PackagesDone/float(PackagesTotal)*100.0)
492 << ":" << s
493 << endl;
494 if(OutStatusFd > 0)
495 write(OutStatusFd, status.str().c_str(), status.str().size());
496 if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
497 std::clog << "send: '" << status.str() << "'" << endl;
498 }
499 if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
500 std::clog << "(parsed from dpkg) pkg: " << pkg
501 << " action: " << action << endl;
502 }
503
504 // DPkgPM::DoDpkgStatusFd /*{{{*/
505 // ---------------------------------------------------------------------
506 /*
507 */
508 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
509 {
510 char *p, *q;
511 int len;
512
513 len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
514 dpkgbuf_pos += len;
515 if(len <= 0)
516 return;
517
518 // process line by line if we have a buffer
519 p = q = dpkgbuf;
520 while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
521 {
522 *q = 0;
523 ProcessDpkgStatusLine(OutStatusFd, p);
524 p=q+1; // continue with next line
525 }
526
527 // now move the unprocessed bits (after the final \n that is now a 0x0)
528 // to the start and update dpkgbuf_pos
529 p = (char*)memrchr(dpkgbuf, 0, dpkgbuf_pos);
530 if(p == NULL)
531 return;
532
533 // we are interessted in the first char *after* 0x0
534 p++;
535
536 // move the unprocessed tail to the start and update pos
537 memmove(dpkgbuf, p, p-dpkgbuf);
538 dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
539 }
540 /*}}}*/
541
542 bool pkgDPkgPM::OpenLog()
543 {
544 string logdir = _config->FindDir("Dir::Log");
545 if(not FileExists(logdir))
546 return _error->Error(_("Directory '%s' missing"), logdir.c_str());
547 string logfile_name = flCombine(logdir,
548 _config->Find("Dir::Log::Terminal"));
549 if (!logfile_name.empty())
550 {
551 term_out = fopen(logfile_name.c_str(),"a");
552 chmod(logfile_name.c_str(), 0600);
553 // output current time
554 char outstr[200];
555 time_t t = time(NULL);
556 struct tm *tmp = localtime(&t);
557 strftime(outstr, sizeof(outstr), "%F %T", tmp);
558 fprintf(term_out, "\nLog started: ");
559 fprintf(term_out, "%s", outstr);
560 fprintf(term_out, "\n");
561 }
562 return true;
563 }
564
565 bool pkgDPkgPM::CloseLog()
566 {
567 if(term_out)
568 {
569 char outstr[200];
570 time_t t = time(NULL);
571 struct tm *tmp = localtime(&t);
572 strftime(outstr, sizeof(outstr), "%F %T", tmp);
573 fprintf(term_out, "Log ended: ");
574 fprintf(term_out, "%s", outstr);
575 fprintf(term_out, "\n");
576 fclose(term_out);
577 }
578 term_out = NULL;
579 return true;
580 }
581
582 /*{{{*/
583 // This implements a racy version of pselect for those architectures
584 // that don't have a working implementation.
585 // FIXME: Probably can be removed on Lenny+1
586 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
587 fd_set *exceptfds, const struct timespec *timeout,
588 const sigset_t *sigmask)
589 {
590 sigset_t origmask;
591 struct timeval tv;
592 int retval;
593
594 tv.tv_sec = timeout->tv_sec;
595 tv.tv_usec = timeout->tv_nsec/1000;
596
597 sigprocmask(SIG_SETMASK, sigmask, &origmask);
598 retval = select(nfds, readfds, writefds, exceptfds, &tv);
599 sigprocmask(SIG_SETMASK, &origmask, 0);
600 return retval;
601 }
602 /*}}}*/
603
604 // DPkgPM::Go - Run the sequence /*{{{*/
605 // ---------------------------------------------------------------------
606 /* This globs the operations and calls dpkg
607 *
608 * If it is called with "OutStatusFd" set to a valid file descriptor
609 * apt will report the install progress over this fd. It maps the
610 * dpkg states a package goes through to human readable (and i10n-able)
611 * names and calculates a percentage for each step.
612 */
613 bool pkgDPkgPM::Go(int OutStatusFd)
614 {
615 fd_set rfds;
616 struct timespec tv;
617 sigset_t sigmask;
618 sigset_t original_sigmask;
619
620 unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
621 unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
622 bool NoTriggers = _config->FindB("DPkg::NoTriggers",false);
623
624 if (RunScripts("DPkg::Pre-Invoke") == false)
625 return false;
626
627 if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
628 return false;
629
630 // map the dpkg states to the operations that are performed
631 // (this is sorted in the same way as Item::Ops)
632 static const struct DpkgState DpkgStatesOpMap[][7] = {
633 // Install operation
634 {
635 {"half-installed", N_("Preparing %s")},
636 {"unpacked", N_("Unpacking %s") },
637 {NULL, NULL}
638 },
639 // Configure operation
640 {
641 {"unpacked",N_("Preparing to configure %s") },
642 {"half-configured", N_("Configuring %s") },
643 #if 0
644 {"triggers-awaited", N_("Processing triggers for %s") },
645 {"triggers-pending", N_("Processing triggers for %s") },
646 #endif
647 { "installed", N_("Installed %s")},
648 {NULL, NULL}
649 },
650 // Remove operation
651 {
652 {"half-configured", N_("Preparing for removal of %s")},
653 #if 0
654 {"triggers-awaited", N_("Preparing for removal of %s")},
655 {"triggers-pending", N_("Preparing for removal of %s")},
656 #endif
657 {"half-installed", N_("Removing %s")},
658 {"config-files", N_("Removed %s")},
659 {NULL, NULL}
660 },
661 // Purge operation
662 {
663 {"config-files", N_("Preparing to completely remove %s")},
664 {"not-installed", N_("Completely removed %s")},
665 {NULL, NULL}
666 },
667 };
668
669 // init the PackageOps map, go over the list of packages that
670 // that will be [installed|configured|removed|purged] and add
671 // them to the PackageOps map (the dpkg states it goes through)
672 // and the PackageOpsTranslations (human readable strings)
673 for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
674 {
675 string name = (*I).Pkg.Name();
676 PackageOpsDone[name] = 0;
677 for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; i++)
678 {
679 PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
680 PackagesTotal++;
681 }
682 }
683
684 stdin_is_dev_null = false;
685
686 // create log
687 OpenLog();
688
689 // this loop is runs once per operation
690 for (vector<Item>::iterator I = List.begin(); I != List.end();)
691 {
692 vector<Item>::iterator J = I;
693 for (; J != List.end() && J->Op == I->Op; J++);
694
695 // Generate the argument list
696 const char *Args[MaxArgs + 50];
697 if (J - I > (signed)MaxArgs)
698 J = I + MaxArgs;
699
700 unsigned int n = 0;
701 unsigned long Size = 0;
702 string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
703 Args[n++] = Tmp.c_str();
704 Size += strlen(Args[n-1]);
705
706 // Stick in any custom dpkg options
707 Configuration::Item const *Opts = _config->Tree("DPkg::Options");
708 if (Opts != 0)
709 {
710 Opts = Opts->Child;
711 for (; Opts != 0; Opts = Opts->Next)
712 {
713 if (Opts->Value.empty() == true)
714 continue;
715 Args[n++] = Opts->Value.c_str();
716 Size += Opts->Value.length();
717 }
718 }
719
720 char status_fd_buf[20];
721 int fd[2];
722 pipe(fd);
723
724 Args[n++] = "--status-fd";
725 Size += strlen(Args[n-1]);
726 snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
727 Args[n++] = status_fd_buf;
728 Size += strlen(Args[n-1]);
729
730 switch (I->Op)
731 {
732 case Item::Remove:
733 Args[n++] = "--force-depends";
734 Size += strlen(Args[n-1]);
735 Args[n++] = "--force-remove-essential";
736 Size += strlen(Args[n-1]);
737 Args[n++] = "--remove";
738 Size += strlen(Args[n-1]);
739 break;
740
741 case Item::Purge:
742 Args[n++] = "--force-depends";
743 Size += strlen(Args[n-1]);
744 Args[n++] = "--force-remove-essential";
745 Size += strlen(Args[n-1]);
746 Args[n++] = "--purge";
747 Size += strlen(Args[n-1]);
748 break;
749
750 case Item::Configure:
751 Args[n++] = "--configure";
752 if (NoTriggers)
753 Args[n++] = "--no-triggers";
754 Size += strlen(Args[n-1]);
755 break;
756
757 case Item::Install:
758 Args[n++] = "--unpack";
759 Size += strlen(Args[n-1]);
760 Args[n++] = "--auto-deconfigure";
761 Size += strlen(Args[n-1]);
762 break;
763 }
764
765 // Write in the file or package names
766 if (I->Op == Item::Install)
767 {
768 for (;I != J && Size < MaxArgBytes; I++)
769 {
770 if (I->File[0] != '/')
771 return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
772 Args[n++] = I->File.c_str();
773 Size += strlen(Args[n-1]);
774 }
775 }
776 else
777 {
778 for (;I != J && Size < MaxArgBytes; I++)
779 {
780 Args[n++] = I->Pkg.Name();
781 Size += strlen(Args[n-1]);
782 }
783 }
784 Args[n] = 0;
785 J = I;
786
787 if (_config->FindB("Debug::pkgDPkgPM",false) == true)
788 {
789 for (unsigned int k = 0; k != n; k++)
790 clog << Args[k] << ' ';
791 clog << endl;
792 continue;
793 }
794
795 cout << flush;
796 clog << flush;
797 cerr << flush;
798
799 /* Mask off sig int/quit. We do this because dpkg also does when
800 it forks scripts. What happens is that when you hit ctrl-c it sends
801 it to all processes in the group. Since dpkg ignores the signal
802 it doesn't die but we do! So we must also ignore it */
803 sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
804 sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
805
806 // ignore SIGHUP as well (debian #463030)
807 sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
808
809 struct termios tt;
810 struct winsize win;
811 int master;
812 int slave;
813
814 // FIXME: setup sensible signal handling (*ick*)
815 tcgetattr(0, &tt);
816 ioctl(0, TIOCGWINSZ, (char *)&win);
817 if (openpty(&master, &slave, NULL, &tt, &win) < 0)
818 {
819 const char *s = _("Can not write log, openpty() "
820 "failed (/dev/pts not mounted?)\n");
821 fprintf(stderr, "%s",s);
822 fprintf(term_out, "%s",s);
823 master = slave = -1;
824 } else {
825 struct termios rtt;
826 rtt = tt;
827 cfmakeraw(&rtt);
828 rtt.c_lflag &= ~ECHO;
829 // block SIGTTOU during tcsetattr to prevent a hang if
830 // the process is a member of the background process group
831 // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
832 sigemptyset(&sigmask);
833 sigaddset(&sigmask, SIGTTOU);
834 sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
835 tcsetattr(0, TCSAFLUSH, &rtt);
836 sigprocmask(SIG_SETMASK, &original_sigmask, 0);
837 }
838
839 // Fork dpkg
840 pid_t Child;
841 _config->Set("APT::Keep-Fds::",fd[1]);
842 Child = ExecFork();
843
844 // This is the child
845 if (Child == 0)
846 {
847 if(slave >= 0 && master >= 0)
848 {
849 setsid();
850 ioctl(slave, TIOCSCTTY, 0);
851 close(master);
852 dup2(slave, 0);
853 dup2(slave, 1);
854 dup2(slave, 2);
855 close(slave);
856 }
857 close(fd[0]); // close the read end of the pipe
858
859 if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
860 _exit(100);
861
862 if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
863 {
864 int Flags,dummy;
865 if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
866 _exit(100);
867
868 // Discard everything in stdin before forking dpkg
869 if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
870 _exit(100);
871
872 while (read(STDIN_FILENO,&dummy,1) == 1);
873
874 if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
875 _exit(100);
876 }
877
878 /* No Job Control Stop Env is a magic dpkg var that prevents it
879 from using sigstop */
880 putenv((char *)"DPKG_NO_TSTP=yes");
881 execvp(Args[0],(char **)Args);
882 cerr << "Could not exec dpkg!" << endl;
883 _exit(100);
884 }
885
886 // apply ionice
887 if (_config->FindB("DPkg::UseIoNice", false) == true)
888 ionice(Child);
889
890 // clear the Keep-Fd again
891 _config->Clear("APT::Keep-Fds",fd[1]);
892
893 // Wait for dpkg
894 int Status = 0;
895
896 // we read from dpkg here
897 int _dpkgin = fd[0];
898 close(fd[1]); // close the write end of the pipe
899
900 // the result of the waitpid call
901 int res;
902 if(slave > 0)
903 close(slave);
904
905 // setups fds
906 sigemptyset(&sigmask);
907 sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
908
909 int select_ret;
910 while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
911 if(res < 0) {
912 // FIXME: move this to a function or something, looks ugly here
913 // error handling, waitpid returned -1
914 if (errno == EINTR)
915 continue;
916 RunScripts("DPkg::Post-Invoke");
917
918 // Restore sig int/quit
919 signal(SIGQUIT,old_SIGQUIT);
920 signal(SIGINT,old_SIGINT);
921 signal(SIGHUP,old_SIGHUP);
922 return _error->Errno("waitpid","Couldn't wait for subprocess");
923 }
924
925 // wait for input or output here
926 FD_ZERO(&rfds);
927 if (!stdin_is_dev_null)
928 FD_SET(0, &rfds);
929 FD_SET(_dpkgin, &rfds);
930 if(master >= 0)
931 FD_SET(master, &rfds);
932 tv.tv_sec = 1;
933 tv.tv_nsec = 0;
934 select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
935 &tv, &original_sigmask);
936 if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
937 select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
938 NULL, &tv, &original_sigmask);
939 if (select_ret == 0)
940 continue;
941 else if (select_ret < 0 && errno == EINTR)
942 continue;
943 else if (select_ret < 0)
944 {
945 perror("select() returned error");
946 continue;
947 }
948
949 if(master >= 0 && FD_ISSET(master, &rfds))
950 DoTerminalPty(master);
951 if(master >= 0 && FD_ISSET(0, &rfds))
952 DoStdin(master);
953 if(FD_ISSET(_dpkgin, &rfds))
954 DoDpkgStatusFd(_dpkgin, OutStatusFd);
955 }
956 close(_dpkgin);
957
958 // Restore sig int/quit
959 signal(SIGQUIT,old_SIGQUIT);
960 signal(SIGINT,old_SIGINT);
961 signal(SIGHUP,old_SIGHUP);
962
963 if(master >= 0)
964 {
965 tcsetattr(0, TCSAFLUSH, &tt);
966 close(master);
967 }
968
969 // Check for an error code.
970 if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
971 {
972 // if it was set to "keep-dpkg-runing" then we won't return
973 // here but keep the loop going and just report it as a error
974 // for later
975 bool stopOnError = _config->FindB("Dpkg::StopOnError",true);
976
977 if(stopOnError)
978 RunScripts("DPkg::Post-Invoke");
979
980 if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
981 _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
982 else if (WIFEXITED(Status) != 0)
983 _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
984 else
985 _error->Error("Sub-process %s exited unexpectedly",Args[0]);
986
987 if(stopOnError)
988 {
989 CloseLog();
990 return false;
991 }
992 }
993 }
994 CloseLog();
995
996 if (RunScripts("DPkg::Post-Invoke") == false)
997 return false;
998
999 Cache.writeStateFile(NULL);
1000 return true;
1001 }
1002 /*}}}*/
1003 // pkgDpkgPM::Reset - Dump the contents of the command list /*{{{*/
1004 // ---------------------------------------------------------------------
1005 /* */
1006 void pkgDPkgPM::Reset()
1007 {
1008 List.erase(List.begin(),List.end());
1009 }
1010 /*}}}*/