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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: dpkgpm.cc,v 1.1 1998/11/13 04:23:39 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::Go - Run the sequence /*{{{*/
// ---------------------------------------------------------------------
/* This globs the operations and calls dpkg */
bool pkgDPkgPM::Go()
{
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;
int n= 0;
Args[n++] = "dpkg";
switch (I->Op)
{
case Item::Remove:
Args[n++] = "--force-depends";
Args[n++] = "--force-remove-essential";
Args[n++] = "--remove";
break;
case Item::Configure:
Args[n++] = "--configure";
break;
case Item::Install:
Args[n++] = "--unpack";
break;
}
// Write in the file or package names
if (I->Op == Item::Install)
for (;I != J; I++)
Args[n++] = I->File.c_str();
else
for (;I != J; I++)
Args[n++] = I->Pkg.Name();
Args[n] = 0;
/* for (int k = 0; k != n; k++)
cout << Args[k] << ' ';
cout << endl;*/
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 = fork();
if (Child < 0)
return _error->Errno("fork","Could't fork");
// This is the child
if (Child == 0)
{
signal(SIGQUIT,SIG_DFL);
signal(SIGINT,SIG_DFL);
signal(SIGWINCH,SIG_DFL);
signal(SIGCONT,SIG_DFL);
signal(SIGTSTP,SIG_DFL);
if (chdir(_config->FindDir("Dir::Cache::Archives").c_str()) != 0)
exit(100);
// Close all of our FDs - just in case
for (int K = 3; K != 40; K++)
fcntl(K,F_SETFD,FD_CLOEXEC);
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("dpkg",(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;
return _error->Errno("waitpid","Couldn't wait for subprocess");
}
// Check for an error code.
if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
return _error->Error("Sub-process returned an error code");
// Restore sig int/quit
signal(SIGQUIT,SIG_DFL);
signal(SIGINT,SIG_DFL);
}
return true;
}
/*}}}*/
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