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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: dpkgpm.cc,v 1.10 1999/07/03 03:10:35 jgg Exp $
/* ######################################################################
DPKG Package Manager - Provide an interface to dpkg
##################################################################### */
/*}}}*/
// Includes /*{{{*/
#ifdef __GNUG__
#pragma implementation "apt-pkg/dpkgpm.h"
#endif
#include <apt-pkg/dpkgpm.h>
#include <apt-pkg/error.h>
#include <apt-pkg/configuration.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <errno.h>
/*}}}*/
// DPkgPM::pkgDPkgPM - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgDPkgPM::pkgDPkgPM(pkgDepCache &Cache) : pkgPackageManager(Cache)
{
}
/*}}}*/
// 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)
{
if (Pkg.end() == true)
return false;
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::Go - Run the sequence /*{{{*/
// ---------------------------------------------------------------------
/* This globs the operations and calls dpkg */
bool pkgDPkgPM::Go()
{
if (RunScripts("DPkg::Pre-Invoke") == false)
return false;
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[400];
if (J - I > 350)
J = I + 350;
unsigned int n = 0;
unsigned long Size = 0;
Args[n++] = _config->Find("Dir::Bin::dpkg","dpkg").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();
}
}
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::Configure:
Args[n++] = "--configure";
Size += strlen(Args[n-1]);
break;
case Item::Install:
Args[n++] = "--unpack";
Size += strlen(Args[n-1]);
break;
}
// Write in the file or package names
if (I->Op == Item::Install)
{
for (;I != J && Size < 1024; 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 < 1024; 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 */
signal(SIGQUIT,SIG_IGN);
signal(SIGINT,SIG_IGN);
// Fork dpkg
pid_t Child = ExecFork();
// This is the child
if (Child == 0)
{
if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
_exit(100);
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 */
setenv("DPKG_NO_TSTP","yes",1);
execvp(Args[0],(char **)Args);
cerr << "Could not exec dpkg!" << endl;
_exit(100);
}
// Wait for dpkg
int Status = 0;
while (waitpid(Child,&Status,0) != Child)
{
if (errno == EINTR)
continue;
RunScripts("DPkg::Post-Invoke");
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)
{
RunScripts("DPkg::Post-Invoke");
if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
return _error->Error("Sub-process recieved a segmentation fault.");
if (WIFEXITED(Status) != 0)
return _error->Error("Sub-process returned an error code (%u)",WEXITSTATUS(Status));
return _error->Error("Sub-process exited unexpectedly");
}
}
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());
}
/*}}}*/