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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 <apt-pkg/dpkgpm.h>
#include <apt-pkg/error.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/strutl.h>
#include <apti18n.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <errno.h>
#include <stdio.h>
#include <sstream>
#include <map>
#include <termios.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <pty.h>
#include <config.h>
#include <apti18n.h>
/*}}}*/
using namespace std;
// DPkgPM::pkgDPkgPM - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
: pkgPackageManager(Cache), dpkgbuf_pos(0),
term_out(NULL), PackagesDone(0), PackagesTotal(0)
{
}
/*}}}*/
// DPkgPM::pkgDPkgPM - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgDPkgPM::~pkgDPkgPM()
{
}
/*}}}*/
// 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.Name());
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));
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::RunScripts - Run a set of scripts /*{{{*/
// ---------------------------------------------------------------------
/* This looks for a list of script sto run from the configuration file,
each one is run with system from a forked child. */
bool pkgDPkgPM::RunScripts(const char *Cnf)
{
Configuration::Item const *Opts = _config->Tree(Cnf);
if (Opts == 0 || Opts->Child == 0)
return true;
Opts = Opts->Child;
// Fork for running the system calls
pid_t Child = ExecFork();
// This is the child
if (Child == 0)
{
if (chdir("/tmp/") != 0)
_exit(100);
unsigned int Count = 1;
for (; Opts != 0; Opts = Opts->Next, Count++)
{
if (Opts->Value.empty() == true)
continue;
if (system(Opts->Value.c_str()) != 0)
_exit(100+Count);
}
_exit(0);
}
// Wait for the child
int Status = 0;
while (waitpid(Child,&Status,0) != Child)
{
if (errno == EINTR)
continue;
return _error->Errno("waitpid","Couldn't wait for subprocess");
}
// Restore sig int/quit
signal(SIGQUIT,SIG_DFL);
signal(SIGINT,SIG_DFL);
// Check for an error code.
if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
{
unsigned int Count = WEXITSTATUS(Status);
if (Count > 100)
{
Count -= 100;
for (; Opts != 0 && Count != 1; Opts = Opts->Next, Count--);
_error->Error("Problem executing scripts %s '%s'",Cnf,Opts->Value.c_str());
}
return _error->Error("Sub-process returned an error code");
}
return true;
}
/*}}}*/
// DPkgPM::SendV2Pkgs - Send version 2 package info /*{{{*/
// ---------------------------------------------------------------------
/* 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)
{
fprintf(F,"VERSION 2\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++)
{
pkgDepCache::StateCache &S = Cache[I->Pkg];
fprintf(F,"%s ",I->Pkg.Name());
// Current version
if (I->Pkg->CurrentVer == 0)
fprintf(F,"- ");
else
fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
// Show the compare operator
// Target version
if (S.InstallVer != 0)
{
int Comp = 2;
if (I->Pkg->CurrentVer != 0)
Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
if (Comp < 0)
fprintf(F,"> ");
if (Comp == 0)
fprintf(F,"= ");
if (Comp > 0)
fprintf(F,"< ");
fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
}
else
fprintf(F,"> - ");
// 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());
}
if (I->Op == Item::Configure)
fprintf(F,"**CONFIGURE**\n");
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)
{
Configuration::Item const *Opts = _config->Tree(Cnf);
if (Opts == 0 || Opts->Child == 0)
return true;
Opts = Opts->Child;
unsigned int Count = 1;
for (; Opts != 0; Opts = Opts->Next, Count++)
{
if (Opts->Value.empty() == true)
continue;
// 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);
// Create the pipes
int Pipes[2];
if (pipe(Pipes) != 0)
return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
SetCloseExec(Pipes[0],true);
SetCloseExec(Pipes[1],true);
// Purified Fork for running the script
pid_t Process = ExecFork();
if (Process == 0)
{
// Setup the FDs
dup2(Pipes[0],STDIN_FILENO);
SetCloseExec(STDOUT_FILENO,false);
SetCloseExec(STDIN_FILENO,false);
SetCloseExec(STDERR_FILENO,false);
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)
return _error->Errno("fdopen","Faild to open new FD");
// Feed it the filenames.
bool Die = false;
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)
{
Die = true;
break;
}
}
}
else
Die = !SendV2Pkgs(F);
fclose(F);
// Clean up the sub process
if (ExecWait(Process,Opts->Value.c_str()) == false)
return _error->Error("Failure running script %s",Opts->Value.c_str());
}
return true;
}
/*}}}*/
// DPkgPM::DoStdin - Read stdin and pass to slave pty /*{{{*/
// ---------------------------------------------------------------------
/*
*/
void pkgDPkgPM::DoStdin(int master)
{
unsigned char input_buf[256] = {0,};
ssize_t len = read(0, input_buf, sizeof(input_buf));
if (len)
write(master, input_buf, len);
else
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
usleep(500000);
return;
}
if(len <= 0)
return;
write(1, term_buf, len);
if(term_out)
fwrite(term_buf, len, sizeof(char), term_out);
}
/*}}}*/
// DPkgPM::ProcessDpkgStatusBuf /*{{{*/
// ---------------------------------------------------------------------
/*
*/
void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
{
// the status we output
ostringstream status;
if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
std::clog << "got from dpkg '" << line << "'" << std::endl;
/* dpkg sends strings like this:
'status: <pkg>: <pkg qstate>'
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: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
*/
char* list[5];
// dpkg sends multiline error messages sometimes (see
// #374195 for a example. we should support this by
// either patching dpkg to not send multiline over the
// statusfd or by rewriting the code here to deal with
// it. for now we just ignore it and not crash
TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
{
if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
std::clog << "ignoring line: not enough ':'" << std::endl;
return;
}
char *pkg = list[1];
char *action = _strstrip(list[2]);
if(strncmp(action,"error",strlen("error")) == 0)
{
status << "pmerror:" << list[1]
<< ":" << (PackagesDone/float(PackagesTotal)*100.0)
<< ":" << list[3]
<< endl;
if(OutStatusFd > 0)
write(OutStatusFd, status.str().c_str(), status.str().size());
if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
std::clog << "send: '" << status.str() << "'" << endl;
return;
}
if(strncmp(action,"conffile",strlen("conffile")) == 0)
{
status << "pmconffile:" << list[1]
<< ":" << (PackagesDone/float(PackagesTotal)*100.0)
<< ":" << list[3]
<< endl;
if(OutStatusFd > 0)
write(OutStatusFd, status.str().c_str(), status.str().size());
if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
std::clog << "send: '" << status.str() << "'" << endl;
return;
}
vector<struct DpkgState> &states = PackageOps[pkg];
const char *next_action = NULL;
if(PackageOpsDone[pkg] < states.size())
next_action = states[PackageOpsDone[pkg]].state;
// check if the package moved to the next dpkg state
if(next_action && (strcmp(action, next_action) == 0))
{
// only read the translation if there is actually a next
// action
const char *translation = _(states[PackageOpsDone[pkg]].str);
char s[200];
snprintf(s, sizeof(s), translation, pkg);
// we moved from one dpkg state to a new one, report that
PackageOpsDone[pkg]++;
PackagesDone++;
// build the status str
status << "pmstatus:" << pkg
<< ":" << (PackagesDone/float(PackagesTotal)*100.0)
<< ":" << s
<< endl;
if(OutStatusFd > 0)
write(OutStatusFd, status.str().c_str(), status.str().size());
if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
std::clog << "send: '" << status.str() << "'" << endl;
}
if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
std::clog << "(parsed from dpkg) pkg: " << pkg
<< " action: " << action << endl;
}
// DPkgPM::DoDpkgStatusFd /*{{{*/
// ---------------------------------------------------------------------
/*
*/
void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
{
char *p, *q;
int len;
len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos);
dpkgbuf_pos += len;
if(len <= 0)
return;
// process line by line if we have a buffer
p = q = dpkgbuf;
while((q=(char*)memchr(p, '\n', dpkgbuf+dpkgbuf_pos-p)) != NULL)
{
*q = 0;
ProcessDpkgStatusLine(OutStatusFd, 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 dpkgbuf_pos
p = (char*)memrchr(dpkgbuf, 0, 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(dpkgbuf, p, p-dpkgbuf);
dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p;
}
/*}}}*/
bool pkgDPkgPM::OpenLog()
{
string logdir = _config->FindDir("Dir::Log");
if(not FileExists(logdir))
return _error->Error(_("Directory '%s' missing"), logdir.c_str());
string logfile_name = flCombine(logdir,
_config->Find("Dir::Log::Terminal"));
if (!logfile_name.empty())
{
term_out = fopen(logfile_name.c_str(),"a");
chmod(logfile_name.c_str(), 0600);
// output current time
char outstr[200];
time_t t = time(NULL);
struct tm *tmp = localtime(&t);
strftime(outstr, sizeof(outstr), "%F %T", tmp);
fprintf(term_out, "\nLog started: ");
fprintf(term_out, outstr);
fprintf(term_out, "\n");
}
return true;
}
bool pkgDPkgPM::CloseLog()
{
if(term_out)
{
char outstr[200];
time_t t = time(NULL);
struct tm *tmp = localtime(&t);
strftime(outstr, sizeof(outstr), "%F %T", tmp);
fprintf(term_out, "Log ended: ");
fprintf(term_out, outstr);
fprintf(term_out, "\n");
fclose(term_out);
}
term_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::Go - Run the sequence /*{{{*/
// ---------------------------------------------------------------------
/* This globs the operations and calls dpkg
*
* If it is called with "OutStatusFd" set to a valid file descriptor
* apt will report the install progress over this fd. 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(int OutStatusFd)
{
unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
if (RunScripts("DPkg::Pre-Invoke") == false)
return false;
if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
return false;
// 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") },
#if 0
{"triggers-awaited", N_("Processing triggers for %s") },
{"triggers-pending", N_("Processing triggers for %s") },
#endif
{ "installed", N_("Installed %s")},
{NULL, NULL}
},
// Remove operation
{
{"half-configured", N_("Preparing for removal of %s")},
#if 0
{"triggers-awaited", N_("Preparing for removal of %s")},
{"triggers-pending", N_("Preparing for removal of %s")},
#endif
{"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>::iterator I = List.begin(); I != List.end();I++)
{
string name = (*I).Pkg.Name();
PackageOpsDone[name] = 0;
for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; i++)
{
PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
PackagesTotal++;
}
}
stdin_is_dev_null = false;
// create log
OpenLog();
// this loop is runs once per operation
for (vector<Item>::iterator I = List.begin(); I != List.end();)
{
vector<Item>::iterator J = I;
for (; J != List.end() && J->Op == I->Op; J++);
// Generate the argument list
const char *Args[MaxArgs + 50];
if (J - I > (signed)MaxArgs)
J = I + MaxArgs;
unsigned int n = 0;
unsigned long Size = 0;
string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
Args[n++] = Tmp.c_str();
Size += strlen(Args[n-1]);
// 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[n++] = Opts->Value.c_str();
Size += Opts->Value.length();
}
}
char status_fd_buf[20];
int fd[2];
pipe(fd);
Args[n++] = "--status-fd";
Size += strlen(Args[n-1]);
snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
Args[n++] = status_fd_buf;
Size += strlen(Args[n-1]);
switch (I->Op)
{
case Item::Remove:
Args[n++] = "--force-depends";
Size += strlen(Args[n-1]);
Args[n++] = "--force-remove-essential";
Size += strlen(Args[n-1]);
Args[n++] = "--remove";
Size += strlen(Args[n-1]);
break;
case Item::Purge:
Args[n++] = "--force-depends";
Size += strlen(Args[n-1]);
Args[n++] = "--force-remove-essential";
Size += strlen(Args[n-1]);
Args[n++] = "--purge";
Size += strlen(Args[n-1]);
break;
case Item::Configure:
Args[n++] = "--configure";
Size += strlen(Args[n-1]);
break;
case Item::Install:
Args[n++] = "--unpack";
Size += strlen(Args[n-1]);
Args[n++] = "--auto-deconfigure";
Size += strlen(Args[n-1]);
break;
}
// 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[n++] = I->File.c_str();
Size += strlen(Args[n-1]);
}
}
else
{
for (;I != J && Size < MaxArgBytes; I++)
{
Args[n++] = I->Pkg.Name();
Size += strlen(Args[n-1]);
}
}
Args[n] = 0;
J = I;
if (_config->FindB("Debug::pkgDPkgPM",false) == true)
{
for (unsigned int k = 0; k != n; k++)
clog << Args[k] << ' ';
clog << endl;
continue;
}
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,SIG_IGN);
struct termios tt;
struct winsize win;
int master;
int slave;
// FIXME: setup sensible signal handling (*ick*)
tcgetattr(0, &tt);
ioctl(0, TIOCGWINSZ, (char *)&win);
if (openpty(&master, &slave, NULL, &tt, &win) < 0)
{
const char *s = _("Can not write log, openpty() "
"failed (/dev/pts not mounted?)\n");
fprintf(stderr, "%s",s);
fprintf(term_out, "%s",s);
master = slave = -1;
} else {
struct termios rtt;
rtt = tt;
cfmakeraw(&rtt);
rtt.c_lflag &= ~ECHO;
tcsetattr(0, TCSAFLUSH, &rtt);
}
// Fork dpkg
pid_t Child;
_config->Set("APT::Keep-Fds::",fd[1]);
Child = ExecFork();
// This is the child
if (Child == 0)
{
if(slave >= 0 && master >= 0)
{
setsid();
ioctl(slave, TIOCSCTTY, 0);
close(master);
dup2(slave, 0);
dup2(slave, 1);
dup2(slave, 2);
close(slave);
}
close(fd[0]); // close the read end of the pipe
if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
_exit(100);
if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
{
int Flags,dummy;
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);
cerr << "Could not exec dpkg!" << endl;
_exit(100);
}
// clear the Keep-Fd again
_config->Clear("APT::Keep-Fds",fd[1]);
// Wait for dpkg
int Status = 0;
// we read from dpkg here
int _dpkgin = fd[0];
close(fd[1]); // close the write end of the pipe
// the result of the waitpid call
int res;
if(slave > 0)
close(slave);
// setups fds
fd_set rfds;
struct timespec tv;
sigset_t sigmask;
sigset_t original_sigmask;
sigemptyset(&sigmask);
sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
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);
return _error->Errno("waitpid","Couldn't wait for subprocess");
}
// wait for input or output here
FD_ZERO(&rfds);
if (!stdin_is_dev_null)
FD_SET(0, &rfds);
FD_SET(_dpkgin, &rfds);
if(master >= 0)
FD_SET(master, &rfds);
tv.tv_sec = 1;
tv.tv_nsec = 0;
select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
&tv, &original_sigmask);
if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
NULL, &tv, &original_sigmask);
if (select_ret == 0)
continue;
else if (select_ret < 0 && errno == EINTR)
continue;
else if (select_ret < 0)
{
perror("select() returned error");
continue;
}
if(master >= 0 && FD_ISSET(master, &rfds))
DoTerminalPty(master);
if(master >= 0 && FD_ISSET(0, &rfds))
DoStdin(master);
if(FD_ISSET(_dpkgin, &rfds))
DoDpkgStatusFd(_dpkgin, OutStatusFd);
}
close(_dpkgin);
// Restore sig int/quit
signal(SIGQUIT,old_SIGQUIT);
signal(SIGINT,old_SIGINT);
if(master >= 0)
{
tcsetattr(0, TCSAFLUSH, &tt);
close(master);
}
// 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 stopOnError = _config->FindB("Dpkg::StopOnError",true);
if(stopOnError)
RunScripts("DPkg::Post-Invoke");
if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
_error->Error("Sub-process %s received a segmentation fault.",Args[0]);
else if (WIFEXITED(Status) != 0)
_error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
else
_error->Error("Sub-process %s exited unexpectedly",Args[0]);
if(stopOnError)
{
CloseLog();
return false;
}
}
}
CloseLog();
if (RunScripts("DPkg::Post-Invoke") == false)
return false;
return true;
}
/*}}}*/
// pkgDpkgPM::Reset - Dump the contents of the command list /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgDPkgPM::Reset()
{
List.erase(List.begin(),List.end());
}
/*}}}*/