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