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apt/apt-pkg/deb/dpkgpm.cc

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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
/* ######################################################################
DPKG Package Manager - Provide an interface to dpkg
##################################################################### */
/*}}}*/
// Includes /*{{{*/
#include <config.h>
#include <apt-pkg/cachefile.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/dpkgpm.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/install-progress.h>
#include <apt-pkg/packagemanager.h>
#include <apt-pkg/pkgrecords.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/cacheiterators.h>
#include <apt-pkg/macros.h>
#include <apt-pkg/pkgcache.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <pty.h>
#include <pwd.h>
#include <signal.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <algorithm>
#include <cstring>
#include <iostream>
#include <map>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include <apti18n.h>
/*}}}*/
using namespace std;
APT_PURE static unsigned int
EnvironmentSize()
{
unsigned int size = 0;
char **envp = environ;
while (*envp != NULL)
size += strlen (*envp++) + 1;
return size;
}
class pkgDPkgPMPrivate
{
public:
pkgDPkgPMPrivate() : stdin_is_dev_null(false), dpkgbuf_pos(0),
term_out(NULL), history_out(NULL),
progress(NULL), tt_is_valid(false), master(-1),
slave(NULL), protect_slave_from_dying(-1),
direct_stdin(false)
{
dpkgbuf[0] = '\0';
}
~pkgDPkgPMPrivate()
{
}
bool stdin_is_dev_null;
// the buffer we use for the dpkg status-fd reading
char dpkgbuf[1024];
int dpkgbuf_pos;
FILE *term_out;
FILE *history_out;
string dpkg_error;
APT::Progress::PackageManager *progress;
// pty stuff
struct termios tt;
bool tt_is_valid;
int master;
char * slave;
int protect_slave_from_dying;
// signals
sigset_t sigmask;
sigset_t original_sigmask;
bool direct_stdin;
};
namespace
{
// Maps the dpkg "processing" info to human readable names. Entry 0
// of each array is the key, entry 1 is the value.
const std::pair<const char *, const char *> PackageProcessingOps[] = {
std::make_pair("install", N_("Installing %s")),
std::make_pair("configure", N_("Configuring %s")),
std::make_pair("remove", N_("Removing %s")),
std::make_pair("purge", N_("Completely removing %s")),
std::make_pair("disappear", N_("Noting disappearance of %s")),
std::make_pair("trigproc", N_("Running post-installation trigger %s"))
};
const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
const std::pair<const char *, const char *> * const PackageProcessingOpsEnd = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
// Predicate to test whether an entry in the PackageProcessingOps
// array matches a string.
class MatchProcessingOp
{
const char *target;
public:
MatchProcessingOp(const char *the_target)
: target(the_target)
{
}
bool operator()(const std::pair<const char *, const char *> &pair) const
{
return strcmp(pair.first, target) == 0;
}
};
}
/* helper function to ionice the given PID
there is no C header for ionice yet - just the syscall interface
so we use the binary from util-linux
*/
static bool
ionice(int PID)
{
if (!FileExists("/usr/bin/ionice"))
return false;
pid_t Process = ExecFork();
if (Process == 0)
{
char buf[32];
snprintf(buf, sizeof(buf), "-p%d", PID);
const char *Args[4];
Args[0] = "/usr/bin/ionice";
Args[1] = "-c3";
Args[2] = buf;
Args[3] = 0;
execv(Args[0], (char **)Args);
}
return ExecWait(Process, "ionice");
}
static std::string getDpkgExecutable()
{
string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
size_t dpkgChrootLen = dpkgChrootDir.length();
if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
{
if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
--dpkgChrootLen;
Tmp = Tmp.substr(dpkgChrootLen);
}
return Tmp;
}
// dpkgChrootDirectory - chrooting for dpkg if needed /*{{{*/
static void dpkgChrootDirectory()
{
std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
if (chrootDir == "/")
return;
std::cerr << "Chrooting into " << chrootDir << std::endl;
if (chroot(chrootDir.c_str()) != 0)
_exit(100);
if (chdir("/") != 0)
_exit(100);
}
/*}}}*/
// FindNowVersion - Helper to find a Version in "now" state /*{{{*/
// ---------------------------------------------------------------------
/* This is helpful when a package is no longer installed but has residual
* config files
*/
static
pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
{
pkgCache::VerIterator Ver;
for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
for (pkgCache::VerFileIterator Vf = Ver.FileList(); Vf.end() == false; ++Vf)
for (pkgCache::PkgFileIterator F = Vf.File(); F.end() == false; ++F)
if (F->Archive != 0 && strcmp(F.Archive(), "now") == 0)
return Ver;
return Ver;
}
/*}}}*/
// DPkgPM::pkgDPkgPM - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
: pkgPackageManager(Cache), pkgFailures(0), PackagesDone(0), PackagesTotal(0)
{
d = new pkgDPkgPMPrivate();
}
/*}}}*/
// DPkgPM::pkgDPkgPM - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgDPkgPM::~pkgDPkgPM()
{
delete d;
}
/*}}}*/
// DPkgPM::Install - Install a package /*{{{*/
// ---------------------------------------------------------------------
/* Add an install operation to the sequence list */
bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
{
if (File.empty() == true || Pkg.end() == true)
return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
// If the filename string begins with DPkg::Chroot-Directory, return the
// substr that is within the chroot so dpkg can access it.
string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
if (chrootdir != "/" && File.find(chrootdir) == 0)
{
size_t len = chrootdir.length();
if (chrootdir.at(len - 1) == '/')
len--;
List.push_back(Item(Item::Install,Pkg,File.substr(len)));
}
else
List.push_back(Item(Item::Install,Pkg,File));
return true;
}
/*}}}*/
// DPkgPM::Configure - Configure a package /*{{{*/
// ---------------------------------------------------------------------
/* Add a configure operation to the sequence list */
bool pkgDPkgPM::Configure(PkgIterator Pkg)
{
if (Pkg.end() == true)
return false;
List.push_back(Item(Item::Configure, Pkg));
// Use triggers for config calls if we configure "smart"
// as otherwise Pre-Depends will not be satisfied, see #526774
if (_config->FindB("DPkg::TriggersPending", false) == true)
List.push_back(Item(Item::TriggersPending, PkgIterator()));
return true;
}
/*}}}*/
// DPkgPM::Remove - Remove a package /*{{{*/
// ---------------------------------------------------------------------
/* Add a remove operation to the sequence list */
bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
{
if (Pkg.end() == true)
return false;
if (Purge == true)
List.push_back(Item(Item::Purge,Pkg));
else
List.push_back(Item(Item::Remove,Pkg));
return true;
}
/*}}}*/
// DPkgPM::SendPkgInfo - Send info for install-pkgs hook /*{{{*/
// ---------------------------------------------------------------------
/* This is part of the helper script communication interface, it sends
very complete information down to the other end of the pipe.*/
bool pkgDPkgPM::SendV2Pkgs(FILE *F)
{
return SendPkgsInfo(F, 2);
}
bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version)
{
// This version of APT supports only v3, so don't sent higher versions
if (Version <= 3)
fprintf(F,"VERSION %u\n", Version);
else
fprintf(F,"VERSION 3\n");
/* Write out all of the configuration directives by walking the
configuration tree */
const Configuration::Item *Top = _config->Tree(0);
for (; Top != 0;)
{
if (Top->Value.empty() == false)
{
fprintf(F,"%s=%s\n",
QuoteString(Top->FullTag(),"=\"\n").c_str(),
QuoteString(Top->Value,"\n").c_str());
}
if (Top->Child != 0)
{
Top = Top->Child;
continue;
}
while (Top != 0 && Top->Next == 0)
Top = Top->Parent;
if (Top != 0)
Top = Top->Next;
}
fprintf(F,"\n");
// Write out the package actions in order.
for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
{
if(I->Pkg.end() == true)
continue;
pkgDepCache::StateCache &S = Cache[I->Pkg];
fprintf(F,"%s ",I->Pkg.Name());
// Current version which we are going to replace
pkgCache::VerIterator CurVer = I->Pkg.CurrentVer();
if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge))
CurVer = FindNowVersion(I->Pkg);
if (CurVer.end() == true)
{
if (Version <= 2)
fprintf(F, "- ");
else
fprintf(F, "- - none ");
}
else
{
fprintf(F, "%s ", CurVer.VerStr());
if (Version >= 3)
fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType());
}
// Show the compare operator between current and install version
if (S.InstallVer != 0)
{
pkgCache::VerIterator const InstVer = S.InstVerIter(Cache);
int Comp = 2;
if (CurVer.end() == false)
Comp = InstVer.CompareVer(CurVer);
if (Comp < 0)
fprintf(F,"> ");
else if (Comp == 0)
fprintf(F,"= ");
else if (Comp > 0)
fprintf(F,"< ");
fprintf(F, "%s ", InstVer.VerStr());
if (Version >= 3)
fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType());
}
else
{
if (Version <= 2)
fprintf(F, "> - ");
else
fprintf(F, "> - - none ");
}
// Show the filename/operation
if (I->Op == Item::Install)
{
// No errors here..
if (I->File[0] != '/')
fprintf(F,"**ERROR**\n");
else
fprintf(F,"%s\n",I->File.c_str());
}
else if (I->Op == Item::Configure)
fprintf(F,"**CONFIGURE**\n");
else if (I->Op == Item::Remove ||
I->Op == Item::Purge)
fprintf(F,"**REMOVE**\n");
if (ferror(F) != 0)
return false;
}
return true;
}
/*}}}*/
// DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
// ---------------------------------------------------------------------
/* This looks for a list of scripts to run from the configuration file
each one is run and is fed on standard input a list of all .deb files
that are due to be installed. */
bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
{
bool result = true;
Configuration::Item const *Opts = _config->Tree(Cnf);
if (Opts == 0 || Opts->Child == 0)
return true;
Opts = Opts->Child;
sighandler_t old_sigpipe = signal(SIGPIPE, SIG_IGN);
unsigned int Count = 1;
for (; Opts != 0; Opts = Opts->Next, Count++)
{
if (Opts->Value.empty() == true)
continue;
if(_config->FindB("Debug::RunScripts", false) == true)
std::clog << "Running external script with list of all .deb file: '"
<< Opts->Value << "'" << std::endl;
// Determine the protocol version
string OptSec = Opts->Value;
string::size_type Pos;
if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
Pos = OptSec.length();
OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
unsigned int Version = _config->FindI(OptSec+"::Version",1);
unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO);
// Create the pipes
std::set<int> KeepFDs;
MergeKeepFdsFromConfiguration(KeepFDs);
int Pipes[2];
if (pipe(Pipes) != 0) {
result = _error->Errno("pipe","Failed to create IPC pipe to subprocess");
break;
}
if (InfoFD != (unsigned)Pipes[0])
SetCloseExec(Pipes[0],true);
else
KeepFDs.insert(Pipes[0]);
SetCloseExec(Pipes[1],true);
// Purified Fork for running the script
pid_t Process = ExecFork(KeepFDs);
if (Process == 0)
{
// Setup the FDs
dup2(Pipes[0], InfoFD);
SetCloseExec(STDOUT_FILENO,false);
SetCloseExec(STDIN_FILENO,false);
SetCloseExec(STDERR_FILENO,false);
string hookfd;
strprintf(hookfd, "%d", InfoFD);
setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1);
dpkgChrootDirectory();
const char *Args[4];
Args[0] = "/bin/sh";
Args[1] = "-c";
Args[2] = Opts->Value.c_str();
Args[3] = 0;
execv(Args[0],(char **)Args);
_exit(100);
}
close(Pipes[0]);
FILE *F = fdopen(Pipes[1],"w");
if (F == 0) {
result = _error->Errno("fdopen","Faild to open new FD");
break;
}
// Feed it the filenames.
if (Version <= 1)
{
for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
{
// Only deal with packages to be installed from .deb
if (I->Op != Item::Install)
continue;
// No errors here..
if (I->File[0] != '/')
continue;
/* Feed the filename of each package that is pending install
into the pipe. */
fprintf(F,"%s\n",I->File.c_str());
if (ferror(F) != 0)
break;
}
}
else
SendPkgsInfo(F, Version);
fclose(F);
// Clean up the sub process
if (ExecWait(Process,Opts->Value.c_str()) == false) {
result = _error->Error("Failure running script %s",Opts->Value.c_str());
break;
}
}
signal(SIGPIPE, old_sigpipe);
return result;
}
/*}}}*/
// DPkgPM::DoStdin - Read stdin and pass to master pty /*{{{*/
// ---------------------------------------------------------------------
/*
*/
void pkgDPkgPM::DoStdin(int master)
{
unsigned char input_buf[256] = {0,};
ssize_t len = read(STDIN_FILENO, input_buf, sizeof(input_buf));
if (len)
FileFd::Write(master, input_buf, len);
else
d->stdin_is_dev_null = true;
}
/*}}}*/
// DPkgPM::DoTerminalPty - Read the terminal pty and write log /*{{{*/
// ---------------------------------------------------------------------
/*
* read the terminal pty and write log
*/
void pkgDPkgPM::DoTerminalPty(int master)
{
unsigned char term_buf[1024] = {0,0, };
ssize_t len=read(master, term_buf, sizeof(term_buf));
if(len == -1 && errno == EIO)
{
// this happens when the child is about to exit, we
// give it time to actually exit, otherwise we run
// into a race so we sleep for half a second.
struct timespec sleepfor = { 0, 500000000 };
nanosleep(&sleepfor, NULL);
return;
}
if(len <= 0)
return;
FileFd::Write(1, term_buf, len);
if(d->term_out)
fwrite(term_buf, len, sizeof(char), d->term_out);
}
/*}}}*/
// DPkgPM::ProcessDpkgStatusBuf /*{{{*/
// ---------------------------------------------------------------------
/*
*/
void pkgDPkgPM::ProcessDpkgStatusLine(char *line)
{
bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
if (Debug == true)
std::clog << "got from dpkg '" << line << "'" << std::endl;
/* dpkg sends strings like this:
'status: <pkg>: <pkg qstate>'
'status: <pkg>:<arch>: <pkg qstate>'
'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: pkg'
'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: trigger'
*/
// we need to split on ": " (note the appended space) as the ':' is
// part of the pkgname:arch information that dpkg sends
//
// A dpkg error message may contain additional ":" (like
// "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
// so we need to ensure to not split too much
std::vector<std::string> list = StringSplit(line, ": ", 4);
if(list.size() < 3)
{
if (Debug == true)
std::clog << "ignoring line: not enough ':'" << std::endl;
return;
}
// build the (prefix, pkgname, action) tuple, position of this
// is different for "processing" or "status" messages
std::string prefix = APT::String::Strip(list[0]);
std::string pkgname;
std::string action;
// "processing" has the form "processing: action: pkg or trigger"
// with action = ["install", "upgrade", "configure", "remove", "purge",
// "disappear", "trigproc"]
if (prefix == "processing")
{
pkgname = APT::String::Strip(list[2]);
action = APT::String::Strip(list[1]);
// we don't care for the difference (as dpkg doesn't really either)
if (action == "upgrade")
action = "install";
}
// "status" has the form: "status: pkg: state"
// with state in ["half-installed", "unpacked", "half-configured",
// "installed", "config-files", "not-installed"]
else if (prefix == "status")
{
pkgname = APT::String::Strip(list[1]);
action = APT::String::Strip(list[2]);
} else {
if (Debug == true)
std::clog << "unknown prefix '" << prefix << "'" << std::endl;
return;
}
/* handle the special cases first:
errors look like this:
'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
and conffile-prompt like this
'status:/etc/compiz.conf/compiz.conf : conffile-prompt: 'current-conffile' 'new-conffile' useredited distedited
*/
if (prefix == "status")
{
if(action == "error")
{
d->progress->Error(pkgname, PackagesDone, PackagesTotal,
list[3]);
pkgFailures++;
WriteApportReport(pkgname.c_str(), list[3].c_str());
return;
}
else if(action == "conffile-prompt")
{
d->progress->ConffilePrompt(pkgname, PackagesDone, PackagesTotal,
list[3]);
return;
}
}
// at this point we know that we should have a valid pkgname, so build all
// the info from it
// dpkg does not always send "pkgname:arch" so we add it here if needed
if (pkgname.find(":") == std::string::npos)
{
// find the package in the group that is touched by dpkg
// if there are multiple pkgs dpkg would send us a full pkgname:arch
pkgCache::GrpIterator Grp = Cache.FindGrp(pkgname);
if (Grp.end() == false)
{
pkgCache::PkgIterator P = Grp.PackageList();
for (; P.end() != true; P = Grp.NextPkg(P))
{
if(Cache[P].Keep() == false || Cache[P].ReInstall() == true)
{
pkgname = P.FullName();
break;
}
}
}
}
const char* const pkg = pkgname.c_str();
std::string short_pkgname = StringSplit(pkgname, ":")[0];
std::string arch = "";
if (pkgname.find(":") != string::npos)
arch = StringSplit(pkgname, ":")[1];
std::string i18n_pkgname = pkgname;
if (arch.size() != 0)
strprintf(i18n_pkgname, "%s (%s)", short_pkgname.c_str(), arch.c_str());
// 'processing' from dpkg looks like
// 'processing: action: pkg'
if(prefix == "processing")
{
const std::pair<const char *, const char *> * const iter =
std::find_if(PackageProcessingOpsBegin,
PackageProcessingOpsEnd,
MatchProcessingOp(action.c_str()));
if(iter == PackageProcessingOpsEnd)
{
if (Debug == true)
std::clog << "ignoring unknown action: " << action << std::endl;
return;
}
std::string msg;
strprintf(msg, _(iter->second), i18n_pkgname.c_str());
d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
// FIXME: this needs a muliarch testcase
// FIXME2: is "pkgname" here reliable with dpkg only sending us
// short pkgnames?
if (action == "disappear")
handleDisappearAction(pkgname);
return;
}
if (prefix == "status")
{
vector<struct DpkgState> const &states = PackageOps[pkg];
if(PackageOpsDone[pkg] < states.size())
{
char const * const next_action = states[PackageOpsDone[pkg]].state;
if (next_action && Debug == true)
std::clog << "(parsed from dpkg) pkg: " << short_pkgname
<< " action: " << action << " (expected: '" << next_action << "' "
<< PackageOpsDone[pkg] << " of " << states.size() << ")" << endl;
// check if the package moved to the next dpkg state
if(next_action && (action == next_action))
{
// only read the translation if there is actually a next action
char const * const translation = _(states[PackageOpsDone[pkg]].str);
// we moved from one dpkg state to a new one, report that
++PackageOpsDone[pkg];
++PackagesDone;
std::string msg;
strprintf(msg, translation, i18n_pkgname.c_str());
d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg);
}
}
}
}
/*}}}*/
// DPkgPM::handleDisappearAction /*{{{*/
void pkgDPkgPM::handleDisappearAction(string const &pkgname)
{
pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
if (unlikely(Pkg.end() == true))
return;
// record the package name for display and stuff later
disappearedPkgs.insert(Pkg.FullName(true));
// the disappeared package was auto-installed - nothing to do
if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
return;
pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
if (unlikely(PkgVer.end() == true))
return;
/* search in the list of dependencies for (Pre)Depends,
check if this dependency has a Replaces on our package
and if so transfer the manual installed flag to it */
for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
{
if (Dep->Type != pkgCache::Dep::Depends &&
Dep->Type != pkgCache::Dep::PreDepends)
continue;
pkgCache::PkgIterator Tar = Dep.TargetPkg();
if (unlikely(Tar.end() == true))
continue;
// the package is already marked as manual
if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
continue;
pkgCache::VerIterator TarVer = Cache[Tar].InstVerIter(Cache);
if (TarVer.end() == true)
continue;
for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
{
if (Rep->Type != pkgCache::Dep::Replaces)
continue;
if (Pkg != Rep.TargetPkg())
continue;
// okay, they are strongly connected - transfer manual-bit
if (Debug == true)
std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
Cache[Tar].Flags &= ~Flag::Auto;
break;
}
}
}
/*}}}*/
// DPkgPM::DoDpkgStatusFd /*{{{*/
// ---------------------------------------------------------------------
/*
*/
void pkgDPkgPM::DoDpkgStatusFd(int statusfd)
{
char *p, *q;
int len;
len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
d->dpkgbuf_pos += len;
if(len <= 0)
return;
// process line by line if we have a buffer
p = q = d->dpkgbuf;
while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
{
*q = 0;
ProcessDpkgStatusLine(p);
p=q+1; // continue with next line
}
// now move the unprocessed bits (after the final \n that is now a 0x0)
// to the start and update d->dpkgbuf_pos
p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
if(p == NULL)
return;
// we are interessted in the first char *after* 0x0
p++;
// move the unprocessed tail to the start and update pos
memmove(d->dpkgbuf, p, p-d->dpkgbuf);
d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
}
/*}}}*/
// DPkgPM::WriteHistoryTag /*{{{*/
void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
{
size_t const length = value.length();
if (length == 0)
return;
// poor mans rstrip(", ")
if (value[length-2] == ',' && value[length-1] == ' ')
value.erase(length - 2, 2);
fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
} /*}}}*/
// DPkgPM::OpenLog /*{{{*/
bool pkgDPkgPM::OpenLog()
{
string const logdir = _config->FindDir("Dir::Log");
if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
// FIXME: use a better string after freeze
return _error->Error(_("Directory '%s' missing"), logdir.c_str());
// get current time
char timestr[200];
time_t const t = time(NULL);
struct tm const * const tmp = localtime(&t);
strftime(timestr, sizeof(timestr), "%F %T", tmp);
// open terminal log
string const logfile_name = flCombine(logdir,
_config->Find("Dir::Log::Terminal"));
if (!logfile_name.empty())
{
d->term_out = fopen(logfile_name.c_str(),"a");
if (d->term_out == NULL)
return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
setvbuf(d->term_out, NULL, _IONBF, 0);
SetCloseExec(fileno(d->term_out), true);
if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it
{
struct passwd *pw = getpwnam("root");
struct group *gr = getgrnam("adm");
if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0)
_error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str());
}
if (chmod(logfile_name.c_str(), 0640) != 0)
_error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str());
fprintf(d->term_out, "\nLog started: %s\n", timestr);
}
// write your history
string const history_name = flCombine(logdir,
_config->Find("Dir::Log::History"));
if (!history_name.empty())
{
d->history_out = fopen(history_name.c_str(),"a");
if (d->history_out == NULL)
return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
SetCloseExec(fileno(d->history_out), true);
chmod(history_name.c_str(), 0644);
fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
string remove, purge, install, reinstall, upgrade, downgrade;
for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
{
enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
string *line = NULL;
#define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
if (Cache[I].NewInstall() == true)
HISTORYINFO(install, CANDIDATE_AUTO)
else if (Cache[I].ReInstall() == true)
HISTORYINFO(reinstall, CANDIDATE)
else if (Cache[I].Upgrade() == true)
HISTORYINFO(upgrade, CURRENT_CANDIDATE)
else if (Cache[I].Downgrade() == true)
HISTORYINFO(downgrade, CURRENT_CANDIDATE)
else if (Cache[I].Delete() == true)
HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
else
continue;
#undef HISTORYINFO
line->append(I.FullName(false)).append(" (");
switch (infostring) {
case CANDIDATE: line->append(Cache[I].CandVersion); break;
case CANDIDATE_AUTO:
line->append(Cache[I].CandVersion);
if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
line->append(", automatic");
break;
case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
case CURRENT: line->append(Cache[I].CurVersion); break;
}
line->append("), ");
}
if (_config->Exists("Commandline::AsString") == true)
WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
WriteHistoryTag("Install", install);
WriteHistoryTag("Reinstall", reinstall);
WriteHistoryTag("Upgrade", upgrade);
WriteHistoryTag("Downgrade",downgrade);
WriteHistoryTag("Remove",remove);
WriteHistoryTag("Purge",purge);
fflush(d->history_out);
}
return true;
}
/*}}}*/
// DPkg::CloseLog /*{{{*/
bool pkgDPkgPM::CloseLog()
{
char timestr[200];
time_t t = time(NULL);
struct tm *tmp = localtime(&t);
strftime(timestr, sizeof(timestr), "%F %T", tmp);
if(d->term_out)
{
fprintf(d->term_out, "Log ended: ");
fprintf(d->term_out, "%s", timestr);
fprintf(d->term_out, "\n");
fclose(d->term_out);
}
d->term_out = NULL;
if(d->history_out)
{
if (disappearedPkgs.empty() == false)
{
string disappear;
for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
d != disappearedPkgs.end(); ++d)
{
pkgCache::PkgIterator P = Cache.FindPkg(*d);
disappear.append(*d);
if (P.end() == true)
disappear.append(", ");
else
disappear.append(" (").append(Cache[P].CurVersion).append("), ");
}
WriteHistoryTag("Disappeared", disappear);
}
if (d->dpkg_error.empty() == false)
fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
fprintf(d->history_out, "End-Date: %s\n", timestr);
fclose(d->history_out);
}
d->history_out = NULL;
return true;
}
/*}}}*/
/*}}}*/
/*{{{*/
// This implements a racy version of pselect for those architectures
// that don't have a working implementation.
// FIXME: Probably can be removed on Lenny+1
static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, const struct timespec *timeout,
const sigset_t *sigmask)
{
sigset_t origmask;
struct timeval tv;
int retval;
tv.tv_sec = timeout->tv_sec;
tv.tv_usec = timeout->tv_nsec/1000;
sigprocmask(SIG_SETMASK, sigmask, &origmask);
retval = select(nfds, readfds, writefds, exceptfds, &tv);
sigprocmask(SIG_SETMASK, &origmask, 0);
return retval;
}
/*}}}*/
// DPkgPM::BuildPackagesProgressMap /*{{{*/
void pkgDPkgPM::BuildPackagesProgressMap()
{
// map the dpkg states to the operations that are performed
// (this is sorted in the same way as Item::Ops)
static const struct DpkgState DpkgStatesOpMap[][7] = {
// Install operation
{
{"half-installed", N_("Preparing %s")},
{"unpacked", N_("Unpacking %s") },
{NULL, NULL}
},
// Configure operation
{
{"unpacked",N_("Preparing to configure %s") },
{"half-configured", N_("Configuring %s") },
{ "installed", N_("Installed %s")},
{NULL, NULL}
},
// Remove operation
{
{"half-configured", N_("Preparing for removal of %s")},
{"half-installed", N_("Removing %s")},
{"config-files", N_("Removed %s")},
{NULL, NULL}
},
// Purge operation
{
{"config-files", N_("Preparing to completely remove %s")},
{"not-installed", N_("Completely removed %s")},
{NULL, NULL}
},
};
// init the PackageOps map, go over the list of packages that
// that will be [installed|configured|removed|purged] and add
// them to the PackageOps map (the dpkg states it goes through)
// and the PackageOpsTranslations (human readable strings)
for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
{
if((*I).Pkg.end() == true)
continue;
string const name = (*I).Pkg.FullName();
PackageOpsDone[name] = 0;
for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
{
PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
PackagesTotal++;
}
}
/* one extra: We don't want the progress bar to reach 100%, especially not
if we call dpkg --configure --pending and process a bunch of triggers
while showing 100%. Also, spindown takes a while, so never reaching 100%
is way more correct than reaching 100% while still doing stuff even if
doing it this way is slightly bending the rules */
++PackagesTotal;
}
/*}}}*/
bool pkgDPkgPM::Go(int StatusFd)
{
APT::Progress::PackageManager *progress = NULL;
if (StatusFd == -1)
progress = APT::Progress::PackageManagerProgressFactory();
else
progress = new APT::Progress::PackageManagerProgressFd(StatusFd);
return Go(progress);
}
void pkgDPkgPM::StartPtyMagic()
{
if (_config->FindB("Dpkg::Use-Pty", true) == false)
{
d->master = -1;
if (d->slave != NULL)
free(d->slave);
d->slave = NULL;
return;
}
if (isatty(STDIN_FILENO) == 0)
d->direct_stdin = true;
_error->PushToStack();
d->master = posix_openpt(O_RDWR | O_NOCTTY);
if (d->master == -1)
_error->Errno("posix_openpt", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
else if (unlockpt(d->master) == -1)
_error->Errno("unlockpt", "Unlocking the slave of master fd %d failed!", d->master);
else
{
char const * const slave_name = ptsname(d->master);
if (slave_name == NULL)
_error->Errno("ptsname", "Getting name for slave of master fd %d failed!", d->master);
else
{
d->slave = strdup(slave_name);
if (d->slave == NULL)
_error->Errno("strdup", "Copying name %s for slave of master fd %d failed!", slave_name, d->master);
else if (grantpt(d->master) == -1)
_error->Errno("grantpt", "Granting access to slave %s based on master fd %d failed!", slave_name, d->master);
else if (tcgetattr(STDIN_FILENO, &d->tt) == 0)
{
d->tt_is_valid = true;
struct termios raw_tt;
// copy window size of stdout if its a 'good' terminal
if (tcgetattr(STDOUT_FILENO, &raw_tt) == 0)
{
struct winsize win;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) < 0)
_error->Errno("ioctl", "Getting TIOCGWINSZ from stdout failed!");
if (ioctl(d->master, TIOCSWINSZ, &win) < 0)
_error->Errno("ioctl", "Setting TIOCSWINSZ for master fd %d failed!", d->master);
}
if (tcsetattr(d->master, TCSANOW, &d->tt) == -1)
_error->Errno("tcsetattr", "Setting in Start via TCSANOW for master fd %d failed!", d->master);
raw_tt = d->tt;
cfmakeraw(&raw_tt);
raw_tt.c_lflag &= ~ECHO;
raw_tt.c_lflag |= ISIG;
// block SIGTTOU during tcsetattr to prevent a hang if
// the process is a member of the background process group
// http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
sigemptyset(&d->sigmask);
sigaddset(&d->sigmask, SIGTTOU);
sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask);
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_tt) == -1)
_error->Errno("tcsetattr", "Setting in Start via TCSAFLUSH for stdin failed!");
sigprocmask(SIG_SETMASK, &d->original_sigmask, NULL);
}
if (d->slave != NULL)
{
/* on linux, closing (and later reopening) all references to the slave
makes the slave a death end, so we open it here to have one open all
the time. We could use this fd in SetupSlavePtyMagic() for linux, but
on kfreebsd we get an incorrect ("step like") output then while it has
no problem with closing all references… so to avoid platform specific
code here we combine both and be happy once more */
d->protect_slave_from_dying = open(d->slave, O_RDWR | O_CLOEXEC | O_NOCTTY);
}
}
}
if (_error->PendingError() == true)
{
if (d->master != -1)
{
close(d->master);
d->master = -1;
}
if (d->slave != NULL)
{
free(d->slave);
d->slave = NULL;
}
_error->DumpErrors(std::cerr);
}
_error->RevertToStack();
}
void pkgDPkgPM::SetupSlavePtyMagic()
{
if(d->master == -1 || d->slave == NULL)
return;
if (close(d->master) == -1)
_error->FatalE("close", "Closing master %d in child failed!", d->master);
d->master = -1;
if (setsid() == -1)
_error->FatalE("setsid", "Starting a new session for child failed!");
int const slaveFd = open(d->slave, O_RDWR | O_NOCTTY);
if (slaveFd == -1)
_error->FatalE("open", _("Can not write log (%s)"), _("Is /dev/pts mounted?"));
else if (ioctl(slaveFd, TIOCSCTTY, 0) < 0)
_error->FatalE("ioctl", "Setting TIOCSCTTY for slave fd %d failed!", slaveFd);
else
{
unsigned short i = 0;
if (d->direct_stdin == true)
++i;
for (; i < 3; ++i)
if (dup2(slaveFd, i) == -1)
_error->FatalE("dup2", "Dupping %d to %d in child failed!", slaveFd, i);
if (d->tt_is_valid == true && tcsetattr(STDIN_FILENO, TCSANOW, &d->tt) < 0)
_error->FatalE("tcsetattr", "Setting in Setup via TCSANOW for slave fd %d failed!", slaveFd);
}
if (slaveFd != -1)
close(slaveFd);
}
void pkgDPkgPM::StopPtyMagic()
{
if (d->slave != NULL)
free(d->slave);
d->slave = NULL;
if (d->protect_slave_from_dying != -1)
{
close(d->protect_slave_from_dying);
d->protect_slave_from_dying = -1;
}
if(d->master >= 0)
{
if (d->tt_is_valid == true && tcsetattr(STDIN_FILENO, TCSAFLUSH, &d->tt) == -1)
_error->FatalE("tcsetattr", "Setting in Stop via TCSAFLUSH for stdin failed!");
close(d->master);
d->master = -1;
}
}
// DPkgPM::Go - Run the sequence /*{{{*/
// ---------------------------------------------------------------------
/* This globs the operations and calls dpkg
*
* If it is called with a progress object apt will report the install
* progress to this object. It maps the dpkg states a package goes
* through to human readable (and i10n-able)
* names and calculates a percentage for each step.
*/
bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
{
pkgPackageManager::SigINTStop = false;
d->progress = progress;
// Generate the base argument list for dpkg
unsigned long StartSize = 0;
std::vector<const char *> Args;
std::string DpkgExecutable = getDpkgExecutable();
Args.push_back(DpkgExecutable.c_str());
StartSize += DpkgExecutable.length();
// Stick in any custom dpkg options
Configuration::Item const *Opts = _config->Tree("DPkg::Options");
if (Opts != 0)
{
Opts = Opts->Child;
for (; Opts != 0; Opts = Opts->Next)
{
if (Opts->Value.empty() == true)
continue;
Args.push_back(Opts->Value.c_str());
StartSize += Opts->Value.length();
}
}
size_t const BaseArgs = Args.size();
// we need to detect if we can qualify packages with the architecture or not
Args.push_back("--assert-multi-arch");
Args.push_back(NULL);
pid_t dpkgAssertMultiArch = ExecFork();
if (dpkgAssertMultiArch == 0)
{
dpkgChrootDirectory();
// redirect everything to the ultimate sink as we only need the exit-status
int const nullfd = open("/dev/null", O_RDONLY);
dup2(nullfd, STDIN_FILENO);
dup2(nullfd, STDOUT_FILENO);
dup2(nullfd, STDERR_FILENO);
execvp(Args[0], (char**) &Args[0]);
_error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!");
_exit(2);
}
fd_set rfds;
struct timespec tv;
// FIXME: do we really need this limit when we have MaxArgBytes?
unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",32*1024);
// try to figure out the max environment size
int OSArgMax = sysconf(_SC_ARG_MAX);
if(OSArgMax < 0)
OSArgMax = 32*1024;
OSArgMax -= EnvironmentSize() - 2*1024;
unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes", OSArgMax);
bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
if (RunScripts("DPkg::Pre-Invoke") == false)
return false;
if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
return false;
// support subpressing of triggers processing for special
// cases like d-i that runs the triggers handling manually
bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
if (_config->FindB("DPkg::ConfigurePending", true) == true)
List.push_back(Item(Item::ConfigurePending, PkgIterator()));
// for the progress
BuildPackagesProgressMap();
d->stdin_is_dev_null = false;
// create log
OpenLog();
bool dpkgMultiArch = false;
if (dpkgAssertMultiArch > 0)
{
int Status = 0;
while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch)
{
if (errno == EINTR)
continue;
_error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch");
break;
}
if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0)
dpkgMultiArch = true;
}
// start pty magic before the loop
StartPtyMagic();
// Tell the progress that its starting and fork dpkg
d->progress->Start(d->master);
// this loop is runs once per dpkg operation
vector<Item>::const_iterator I = List.begin();
while (I != List.end())
{
// Do all actions with the same Op in one run
vector<Item>::const_iterator J = I;
if (TriggersPending == true)
for (; J != List.end(); ++J)
{
if (J->Op == I->Op)
continue;
if (J->Op != Item::TriggersPending)
break;
vector<Item>::const_iterator T = J + 1;
if (T != List.end() && T->Op == I->Op)
continue;
break;
}
else
for (; J != List.end() && J->Op == I->Op; ++J)
/* nothing */;
// keep track of allocated strings for multiarch package names
std::vector<char *> Packages;
// start with the baseset of arguments
unsigned long Size = StartSize;
Args.erase(Args.begin() + BaseArgs, Args.end());
// Now check if we are within the MaxArgs limit
//
// this code below is problematic, because it may happen that
// the argument list is split in a way that A depends on B
// and they are in the same "--configure A B" run
// - with the split they may now be configured in different
// runs, using Immediate-Configure-All can help prevent this.
if (J - I > (signed)MaxArgs)
{
J = I + MaxArgs;
unsigned long const size = MaxArgs + 10;
Args.reserve(size);
Packages.reserve(size);
}
else
{
unsigned long const size = (J - I) + 10;
Args.reserve(size);
Packages.reserve(size);
}
int fd[2];
if (pipe(fd) != 0)
return _error->Errno("pipe","Failed to create IPC pipe to dpkg");
#define ADDARG(X) Args.push_back(X); Size += strlen(X)
#define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
ADDARGC("--status-fd");
char status_fd_buf[20];
snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
ADDARG(status_fd_buf);
unsigned long const Op = I->Op;
switch (I->Op)
{
case Item::Remove:
ADDARGC("--force-depends");
ADDARGC("--force-remove-essential");
ADDARGC("--remove");
break;
case Item::Purge:
ADDARGC("--force-depends");
ADDARGC("--force-remove-essential");
ADDARGC("--purge");
break;
case Item::Configure:
ADDARGC("--configure");
break;
case Item::ConfigurePending:
ADDARGC("--configure");
ADDARGC("--pending");
break;
case Item::TriggersPending:
ADDARGC("--triggers-only");
ADDARGC("--pending");
break;
case Item::Install:
ADDARGC("--unpack");
ADDARGC("--auto-deconfigure");
break;
}
if (NoTriggers == true && I->Op != Item::TriggersPending &&
I->Op != Item::ConfigurePending)
{
ADDARGC("--no-triggers");
}
#undef ADDARGC
// Write in the file or package names
if (I->Op == Item::Install)
{
for (;I != J && Size < MaxArgBytes; ++I)
{
if (I->File[0] != '/')
return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
Args.push_back(I->File.c_str());
Size += I->File.length();
}
}
else
{
string const nativeArch = _config->Find("APT::Architecture");
unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
for (;I != J && Size < MaxArgBytes; ++I)
{
if((*I).Pkg.end() == true)
continue;
if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end())
continue;
// We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian
if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch ||
strcmp(I->Pkg.Arch(), "all") == 0 ||
strcmp(I->Pkg.Arch(), "none") == 0))
{
char const * const name = I->Pkg.Name();
ADDARG(name);
}
else
{
pkgCache::VerIterator PkgVer;
std::string name = I->Pkg.Name();
if (Op == Item::Remove || Op == Item::Purge)
{
PkgVer = I->Pkg.CurrentVer();
if(PkgVer.end() == true)
PkgVer = FindNowVersion(I->Pkg);
}
else
PkgVer = Cache[I->Pkg].InstVerIter(Cache);
if (strcmp(I->Pkg.Arch(), "none") == 0)
; // never arch-qualify a package without an arch
else if (PkgVer.end() == false)
name.append(":").append(PkgVer.Arch());
else
_error->Warning("Can not find PkgVer for '%s'", name.c_str());
char * const fullname = strdup(name.c_str());
Packages.push_back(fullname);
ADDARG(fullname);
}
}
// skip configure action if all sheduled packages disappeared
if (oldSize == Size)
continue;
}
#undef ADDARG
J = I;
if (_config->FindB("Debug::pkgDPkgPM",false) == true)
{
for (std::vector<const char *>::const_iterator a = Args.begin();
a != Args.end(); ++a)
clog << *a << ' ';
clog << endl;
continue;
}
Args.push_back(NULL);
cout << flush;
clog << flush;
cerr << flush;
/* Mask off sig int/quit. We do this because dpkg also does when
it forks scripts. What happens is that when you hit ctrl-c it sends
it to all processes in the group. Since dpkg ignores the signal
it doesn't die but we do! So we must also ignore it */
sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
sighandler_t old_SIGINT = signal(SIGINT,SigINT);
// Check here for any SIGINT
if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
break;
// ignore SIGHUP as well (debian #463030)
sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
// now run dpkg
d->progress->StartDpkg();
std::set<int> KeepFDs;
KeepFDs.insert(fd[1]);
MergeKeepFdsFromConfiguration(KeepFDs);
pid_t Child = ExecFork(KeepFDs);
if (Child == 0)
{
// This is the child
SetupSlavePtyMagic();
close(fd[0]); // close the read end of the pipe
dpkgChrootDirectory();
if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
_exit(100);
if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
{
int Flags;
int dummy = 0;
if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
_exit(100);
// Discard everything in stdin before forking dpkg
if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
_exit(100);
while (read(STDIN_FILENO,&dummy,1) == 1);
if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
_exit(100);
}
/* No Job Control Stop Env is a magic dpkg var that prevents it
from using sigstop */
putenv((char *)"DPKG_NO_TSTP=yes");
execvp(Args[0], (char**) &Args[0]);
cerr << "Could not exec dpkg!" << endl;
_exit(100);
}
// apply ionice
if (_config->FindB("DPkg::UseIoNice", false) == true)
ionice(Child);
// Wait for dpkg
int Status = 0;
// we read from dpkg here
int const _dpkgin = fd[0];
close(fd[1]); // close the write end of the pipe
// setups fds
sigemptyset(&d->sigmask);
sigprocmask(SIG_BLOCK,&d->sigmask,&d->original_sigmask);
/* free vectors (and therefore memory) as we don't need the included data anymore */
for (std::vector<char *>::const_iterator p = Packages.begin();
p != Packages.end(); ++p)
free(*p);
Packages.clear();
// the result of the waitpid call
int res;
int select_ret;
while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
if(res < 0) {
// FIXME: move this to a function or something, looks ugly here
// error handling, waitpid returned -1
if (errno == EINTR)
continue;
RunScripts("DPkg::Post-Invoke");
// Restore sig int/quit
signal(SIGQUIT,old_SIGQUIT);
signal(SIGINT,old_SIGINT);
signal(SIGHUP,old_SIGHUP);
return _error->Errno("waitpid","Couldn't wait for subprocess");
}
// wait for input or output here
FD_ZERO(&rfds);
if (d->master >= 0 && d->direct_stdin == false && d->stdin_is_dev_null == false)
FD_SET(STDIN_FILENO, &rfds);
FD_SET(_dpkgin, &rfds);
if(d->master >= 0)
FD_SET(d->master, &rfds);
tv.tv_sec = 0;
tv.tv_nsec = d->progress->GetPulseInterval();
select_ret = pselect(max(d->master, _dpkgin)+1, &rfds, NULL, NULL,
&tv, &d->original_sigmask);
if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
select_ret = racy_pselect(max(d->master, _dpkgin)+1, &rfds, NULL,
NULL, &tv, &d->original_sigmask);
d->progress->Pulse();
if (select_ret == 0)
continue;
else if (select_ret < 0 && errno == EINTR)
continue;
else if (select_ret < 0)
{
perror("select() returned error");
continue;
}
if(d->master >= 0 && FD_ISSET(d->master, &rfds))
DoTerminalPty(d->master);
if(d->master >= 0 && FD_ISSET(0, &rfds))
DoStdin(d->master);
if(FD_ISSET(_dpkgin, &rfds))
DoDpkgStatusFd(_dpkgin);
}
close(_dpkgin);
// Restore sig int/quit
signal(SIGQUIT,old_SIGQUIT);
signal(SIGINT,old_SIGINT);
signal(SIGHUP,old_SIGHUP);
// Check for an error code.
if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
{
// if it was set to "keep-dpkg-runing" then we won't return
// here but keep the loop going and just report it as a error
// for later
bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
else if (WIFEXITED(Status) != 0)
strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
else
strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
_error->Error("%s", d->dpkg_error.c_str());
if(stopOnError)
break;
}
}
// dpkg is done at this point
d->progress->Stop();
StopPtyMagic();
CloseLog();
if (pkgPackageManager::SigINTStop)
_error->Warning(_("Operation was interrupted before it could finish"));
if (RunScripts("DPkg::Post-Invoke") == false)
return false;
if (_config->FindB("Debug::pkgDPkgPM",false) == false)
{
std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
unlink(oldpkgcache.c_str()) == 0)
{
std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
{
_error->PushToStack();
pkgCacheFile CacheFile;
CacheFile.BuildCaches(NULL, true);
_error->RevertToStack();
}
}
}
Cache.writeStateFile(NULL);
return d->dpkg_error.empty();
}
void SigINT(int /*sig*/) {
pkgPackageManager::SigINTStop = true;
}
/*}}}*/
// pkgDpkgPM::Reset - Dump the contents of the command list /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgDPkgPM::Reset()
{
List.erase(List.begin(),List.end());
}
/*}}}*/
// pkgDpkgPM::WriteApportReport - write out error report pkg failure /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
{
// If apport doesn't exist or isn't installed do nothing
// This e.g. prevents messages in 'universes' without apport
pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport");
if (apportPkg.end() == true || apportPkg->CurrentVer == 0)
return;
string pkgname, reportfile, pkgver, arch;
string::size_type pos;
FILE *report;
if (_config->FindB("Dpkg::ApportFailureReport", true) == false)
{
std::clog << "configured to not write apport reports" << std::endl;
return;
}
// only report the first errors
if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
{
std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
return;
}
// check if its not a follow up error
const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
if(strstr(errormsg, needle) != NULL) {
std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
return;
}
// do not report disk-full failures
if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
return;
}
// do not report out-of-memory failures
if(strstr(errormsg, strerror(ENOMEM)) != NULL ||
strstr(errormsg, "failed to allocate memory") != NULL) {
std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
return;
}
// do not report bugs regarding inaccessible local files
if(strstr(errormsg, strerror(ENOENT)) != NULL ||
strstr(errormsg, "cannot access archive") != NULL) {
std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
return;
}
// do not report errors encountered when decompressing packages
if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) {
std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl;
return;
}
// do not report dpkg I/O errors, this is a format string, so we compare
// the prefix and the suffix of the error with the dpkg error message
vector<string> io_errors;
io_errors.push_back(string("failed to read"));
io_errors.push_back(string("failed to write"));
io_errors.push_back(string("failed to seek"));
io_errors.push_back(string("unexpected end of file or stream"));
for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); ++I)
{
vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%');
if (list.size() > 1) {
// we need to split %s, VectorizeString only allows char so we need
// to kill the "s" manually
if (list[1].size() > 1) {
list[1].erase(0, 1);
if(strstr(errormsg, list[0].c_str()) &&
strstr(errormsg, list[1].c_str())) {
std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
return;
}
}
}
}
// get the pkgname and reportfile
pkgname = flNotDir(pkgpath);
pos = pkgname.find('_');
if(pos != string::npos)
pkgname = pkgname.substr(0, pos);
// find the package versin and source package name
pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
if (Pkg.end() == true)
return;
pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
if (Ver.end() == true)
return;
pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
// if the file exists already, we check:
// - if it was reported already (touched by apport).
// If not, we do nothing, otherwise
// we overwrite it. This is the same behaviour as apport
// - if we have a report with the same pkgversion already
// then we skip it
reportfile = flCombine("/var/crash",pkgname+".0.crash");
if(FileExists(reportfile))
{
struct stat buf;
char strbuf[255];
// check atime/mtime
stat(reportfile.c_str(), &buf);
if(buf.st_mtime > buf.st_atime)
return;
// check if the existing report is the same version
report = fopen(reportfile.c_str(),"r");
while(fgets(strbuf, sizeof(strbuf), report) != NULL)
{
if(strstr(strbuf,"Package:") == strbuf)
{
char pkgname[255], version[255];
if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2)
if(strcmp(pkgver.c_str(), version) == 0)
{
fclose(report);
return;
}
}
}
fclose(report);
}
// now write the report
arch = _config->Find("APT::Architecture");
report = fopen(reportfile.c_str(),"w");
if(report == NULL)
return;
if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
chmod(reportfile.c_str(), 0);
else
chmod(reportfile.c_str(), 0600);
fprintf(report, "ProblemType: Package\n");
fprintf(report, "Architecture: %s\n", arch.c_str());
time_t now = time(NULL);
fprintf(report, "Date: %s" , ctime(&now));
fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
#if APT_PKG_ABI >= 413
fprintf(report, "SourcePackage: %s\n", Ver.SourcePkgName());
#else
pkgRecords Recs(Cache);
pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
std::string srcpkgname = Parse.SourcePkg();
if(srcpkgname.empty())
srcpkgname = pkgname;
fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
#endif
fprintf(report, "ErrorMessage:\n %s\n", errormsg);
// ensure that the log is flushed
if(d->term_out)
fflush(d->term_out);
// attach terminal log it if we have it
string logfile_name = _config->FindFile("Dir::Log::Terminal");
if (!logfile_name.empty())
{
FILE *log = NULL;
fprintf(report, "DpkgTerminalLog:\n");
log = fopen(logfile_name.c_str(),"r");
if(log != NULL)
{
char buf[1024];
while( fgets(buf, sizeof(buf), log) != NULL)
fprintf(report, " %s", buf);
fprintf(report, " \n");
fclose(log);
}
}
// attach history log it if we have it
string histfile_name = _config->FindFile("Dir::Log::History");
if (!histfile_name.empty())
{
fprintf(report, "DpkgHistoryLog:\n");
FILE* log = fopen(histfile_name.c_str(),"r");
if(log != NULL)
{
char buf[1024];
while( fgets(buf, sizeof(buf), log) != NULL)
fprintf(report, " %s", buf);
fclose(log);
}
}
// log the ordering, see dpkgpm.h and the "Ops" enum there
const char *ops_str[] = {
"Install",
"Configure",
"Remove",
"Purge",
"ConfigurePending",
"TriggersPending",
};
fprintf(report, "AptOrdering:\n");
for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
if ((*I).Pkg != NULL)
fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
else
fprintf(report, " %s: %s\n", "NULL", ops_str[(*I).Op]);
// attach dmesg log (to learn about segfaults)
if (FileExists("/bin/dmesg"))
{
fprintf(report, "Dmesg:\n");
FILE *log = popen("/bin/dmesg","r");
if(log != NULL)
{
char buf[1024];
while( fgets(buf, sizeof(buf), log) != NULL)
fprintf(report, " %s", buf);
pclose(log);
}
}
// attach df -l log (to learn about filesystem status)
if (FileExists("/bin/df"))
{
fprintf(report, "Df:\n");
FILE *log = popen("/bin/df -l","r");
if(log != NULL)
{
char buf[1024];
while( fgets(buf, sizeof(buf), log) != NULL)
fprintf(report, " %s", buf);
pclose(log);
}
}
fclose(report);
}
/*}}}*/