[apt.git] / apt-pkg / deb / dpkgpm.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: dpkgpm.cc,v 1.18 2001/02/20 07:03:17 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 <apt-pkg/depcache.h>
#include <apt-pkg/strutl.h>
    
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <errno.h>
#include <stdio.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,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();
      else
	 Pos--;
      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);
      if (Die == true)
      {
	 kill(Process,SIGINT);
	 ExecWait(Process,Opts->Value.c_str(),true);
	 return _error->Error("Failure running script %s",Opts->Value.c_str());
      }
      
      // 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::Go - Run the sequence					/*{{{*/
// ---------------------------------------------------------------------
/* This globs the operations and calls dpkg */
bool pkgDPkgPM::Go()
{
   if (RunScripts("DPkg::Pre-Invoke") == false)
      return false;

   if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == 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::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]);
	 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);
	 
	 if (_config->FindB("DPkg::FlushSTDIN",true) == true)
	 {
	    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("DPKG_NO_TSTP=yes");
	 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 %s received a segmentation fault.",Args[0]);

	 if (WIFEXITED(Status) != 0)
	    return _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
	 
	 return _error->Error("Sub-process %s exited unexpectedly",Args[0]);
      }      
   }

   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());
}
									/*}}}*/
Commit	Line	Data
03e39e59 AL	1	// -- mode: cpp; mode: fold --
03e39e59 AL	2	// Description /{{{/
b2e465d6	3	// $Id: dpkgpm.cc,v 1.18 2001/02/20 07:03:17 jgg Exp $
03e39e59 AL	4	/* ######################################################################
	5
	6	DPKG Package Manager - Provide an interface to dpkg
	7
	8	##################################################################### */
	9	/}}}/
	10	// Includes /{{{/
	11	#ifdef __GNUG__
	12	#pragma implementation "apt-pkg/dpkgpm.h"
	13	#endif
	14	#include <apt-pkg/dpkgpm.h>
	15	#include <apt-pkg/error.h>
	16	#include <apt-pkg/configuration.h>
b2e465d6 AL	17	#include <apt-pkg/depcache.h>
	18	#include <apt-pkg/strutl.h>
	19
03e39e59 AL	20	#include <unistd.h>
	21	#include <stdlib.h>
	22	#include <fcntl.h>
	23	#include <sys/types.h>
	24	#include <sys/wait.h>
	25	#include <signal.h>
	26	#include <errno.h>
db0c350f	27	#include <stdio.h>
03e39e59 AL	28	/}}}/
	29
	30	// DPkgPM::pkgDPkgPM - Constructor /{{{/
	31	// ---------------------------------------------------------------------
	32	/* */
b2e465d6	33	pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache) : pkgPackageManager(Cache)
03e39e59 AL	34	{
	35	}
	36	/}}}/
	37	// DPkgPM::pkgDPkgPM - Destructor /{{{/
	38	// ---------------------------------------------------------------------
	39	/* */
	40	pkgDPkgPM::~pkgDPkgPM()
	41	{
	42	}
	43	/}}}/
	44	// DPkgPM::Install - Install a package /{{{/
	45	// ---------------------------------------------------------------------
	46	/* Add an install operation to the sequence list */
	47	bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
	48	{
	49	if (File.empty() == true \|\| Pkg.end() == true)
	50	return _error->Error("Internal Error, No file name for %s",Pkg.Name());
	51
	52	List.push_back(Item(Item::Install,Pkg,File));
	53	return true;
	54	}
	55	/}}}/
	56	// DPkgPM::Configure - Configure a package /{{{/
	57	// ---------------------------------------------------------------------
	58	/* Add a configure operation to the sequence list */
	59	bool pkgDPkgPM::Configure(PkgIterator Pkg)
	60	{
	61	if (Pkg.end() == true)
	62	return false;
	63
	64	List.push_back(Item(Item::Configure,Pkg));
	65	return true;
	66	}
	67	/}}}/
	68	// DPkgPM::Remove - Remove a package /{{{/
	69	// ---------------------------------------------------------------------
	70	/* Add a remove operation to the sequence list */
fc4b5c9f	71	bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
03e39e59 AL	72	{
	73	if (Pkg.end() == true)
	74	return false;
	75
fc4b5c9f AL	76	if (Purge == true)
	77	List.push_back(Item(Item::Purge,Pkg));
	78	else
	79	List.push_back(Item(Item::Remove,Pkg));
6dd55be7 AL	80	return true;
	81	}
	82	/}}}/
	83	// DPkgPM::RunScripts - Run a set of scripts /{{{/
	84	// ---------------------------------------------------------------------
	85	/* This looks for a list of script sto run from the configuration file,
	86	each one is run with system from a forked child. */
	87	bool pkgDPkgPM::RunScripts(const char *Cnf)
	88	{
	89	Configuration::Item const *Opts = _config->Tree(Cnf);
	90	if (Opts == 0 \|\| Opts->Child == 0)
	91	return true;
	92	Opts = Opts->Child;
	93
	94	// Fork for running the system calls
54676e1a	95	pid_t Child = ExecFork();
6dd55be7 AL	96
	97	// This is the child
	98	if (Child == 0)
	99	{
6dd55be7 AL	100	if (chdir("/tmp/") != 0)
	101	_exit(100);
	102
6dd55be7 AL	103	unsigned int Count = 1;
	104	for (; Opts != 0; Opts = Opts->Next, Count++)
	105	{
	106	if (Opts->Value.empty() == true)
	107	continue;
	108
	109	if (system(Opts->Value.c_str()) != 0)
	110	_exit(100+Count);
	111	}
	112	_exit(0);
	113	}
	114
	115	// Wait for the child
	116	int Status = 0;
	117	while (waitpid(Child,&Status,0) != Child)
	118	{
	119	if (errno == EINTR)
	120	continue;
	121	return _error->Errno("waitpid","Couldn't wait for subprocess");
	122	}
	123
	124	// Restore sig int/quit
	125	signal(SIGQUIT,SIG_DFL);
	126	signal(SIGINT,SIG_DFL);
ddc1d8d0	127
6dd55be7 AL	128	// Check for an error code.
	129	if (WIFEXITED(Status) == 0 \|\| WEXITSTATUS(Status) != 0)
	130	{
	131	unsigned int Count = WEXITSTATUS(Status);
	132	if (Count > 100)
	133	{
	134	Count -= 100;
	135	for (; Opts != 0 && Count != 1; Opts = Opts->Next, Count--);
cf544e14	136	_error->Error("Problem executing scripts %s '%s'",Cnf,Opts->Value.c_str());
6dd55be7 AL	137	}
	138
	139	return _error->Error("Sub-process returned an error code");
	140	}
	141
03e39e59 AL	142	return true;
03e39e59 AL	143	}
db0c350f AL	144
db0c350f AL	145	/}}}/
b2e465d6 AL	146	// DPkgPM::SendV2Pkgs - Send version 2 package info /{{{/
	147	// ---------------------------------------------------------------------
	148	/* This is part of the helper script communication interface, it sends
	149	very complete information down to the other end of the pipe.*/
	150	bool pkgDPkgPM::SendV2Pkgs(FILE *F)
	151	{
	152	fprintf(F,"VERSION 2\n");
	153
	154	/* Write out all of the configuration directives by walking the
	155	configuration tree */
	156	const Configuration::Item *Top = _config->Tree(0);
	157	for (; Top != 0;)
	158	{
	159	if (Top->Value.empty() == false)
	160	{
	161	fprintf(F,"%s=%s\n",
	162	QuoteString(Top->FullTag(),"=\"\n").c_str(),
	163	QuoteString(Top->Value,"\n").c_str());
	164	}
	165
	166	if (Top->Child != 0)
	167	{
	168	Top = Top->Child;
	169	continue;
	170	}
	171
	172	while (Top != 0 && Top->Next == 0)
	173	Top = Top->Parent;
	174	if (Top != 0)
	175	Top = Top->Next;
	176	}
	177	fprintf(F,"\n");
	178
	179	// Write out the package actions in order.
	180	for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
	181	{
	182	pkgDepCache::StateCache &S = Cache[I->Pkg];
	183
	184	fprintf(F,"%s ",I->Pkg.Name());
	185	// Current version
	186	if (I->Pkg->CurrentVer == 0)
	187	fprintf(F,"- ");
	188	else
	189	fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
	190
	191	// Show the compare operator
	192	// Target version
	193	if (S.InstallVer != 0)
	194	{
	195	int Comp = 2;
	196	if (I->Pkg->CurrentVer != 0)
	197	Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
	198	if (Comp < 0)
	199	fprintf(F,"> ");
	200	if (Comp == 0)
	201	fprintf(F,"= ");
	202	if (Comp > 0)
	203	fprintf(F,"< ");
	204	fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
	205	}
	206	else
	207	fprintf(F,"> - ");
	208
	209	// Show the filename/operation
210	if (I->Op == Item::Install)
211	{
212	// No errors here..
213	if (I->File[0] != '/')
214	fprintf(F,"ERROR\n");
215	else
216	fprintf(F,"%s\n",I->File.c_str());
217	}
218	if (I->Op == Item::Configure)
219	fprintf(F,"CONFIGURE\n");
220	if (I->Op == Item::Remove \|\|
221	I->Op == Item::Purge)
222	fprintf(F,"REMOVE\n");
223
224	if (ferror(F) != 0)
225	return false;
226	}
227	return true;
228	}
229	/}}}/
db0c350f AL	230	// DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /{{{/
	231	// ---------------------------------------------------------------------
	232	/* This looks for a list of scripts to run from the configuration file
	233	each one is run and is fed on standard input a list of all .deb files
	234	that are due to be installed. */
	235	bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
	236	{
	237	Configuration::Item const *Opts = _config->Tree(Cnf);
	238	if (Opts == 0 \|\| Opts->Child == 0)
	239	return true;
	240	Opts = Opts->Child;
	241
	242	unsigned int Count = 1;
	243	for (; Opts != 0; Opts = Opts->Next, Count++)
	244	{
	245	if (Opts->Value.empty() == true)
	246	continue;
b2e465d6 AL	247
	248	// Determine the protocol version
	249	string OptSec = Opts->Value;
	250	string::size_type Pos;
	251	if ((Pos = OptSec.find(' ')) == string::npos \|\| Pos == 0)
	252	Pos = OptSec.length();
	253	else
	254	Pos--;
	255	OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
	256
	257	unsigned int Version = _config->FindI(OptSec+"::Version",1);
	258
db0c350f AL	259	// Create the pipes
	260	int Pipes[2];
	261	if (pipe(Pipes) != 0)
	262	return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
	263	SetCloseExec(Pipes[0],true);
	264	SetCloseExec(Pipes[1],true);
	265
	266	// Purified Fork for running the script
	267	pid_t Process = ExecFork();
	268	if (Process == 0)
	269	{
	270	// Setup the FDs
	271	dup2(Pipes[0],STDIN_FILENO);
	272	SetCloseExec(STDOUT_FILENO,false);
	273	SetCloseExec(STDIN_FILENO,false);
	274	SetCloseExec(STDERR_FILENO,false);
90ecbd7d AL	275
90ecbd7d AL	276	const char *Args[4];
db0c350f	277	Args[0] = "/bin/sh";
90ecbd7d AL	278	Args[1] = "-c";
	279	Args[2] = Opts->Value.c_str();
	280	Args[3] = 0;
db0c350f AL	281	execv(Args[0],(char **)Args);
	282	_exit(100);
	283	}
	284	close(Pipes[0]);
b2e465d6 AL	285	FILE *F = fdopen(Pipes[1],"w");
	286	if (F == 0)
	287	return _error->Errno("fdopen","Faild to open new FD");
	288
db0c350f	289	// Feed it the filenames.
b2e465d6 AL	290	bool Die = false;
b2e465d6 AL	291	if (Version <= 1)
db0c350f	292	{
b2e465d6	293	for (vector<Item>::iterator I = List.begin(); I != List.end(); I++)
db0c350f	294	{
b2e465d6 AL	295	// Only deal with packages to be installed from .deb
	296	if (I->Op != Item::Install)
	297	continue;
	298
	299	// No errors here..
	300	if (I->File[0] != '/')
	301	continue;
	302
	303	/* Feed the filename of each package that is pending install
	304	into the pipe. */
	305	fprintf(F,"%s\n",I->File.c_str());
	306	if (ferror(F) != 0)
	307	{
	308	Die = true;
	309	break;
	310	}
90ecbd7d	311	}
db0c350f	312	}
b2e465d6 AL	313	else
	314	Die = !SendV2Pkgs(F);
	315
	316	fclose(F);
	317	if (Die == true)
	318	{
	319	kill(Process,SIGINT);
	320	ExecWait(Process,Opts->Value.c_str(),true);
	321	return _error->Error("Failure running script %s",Opts->Value.c_str());
	322	}
db0c350f AL	323
	324	// Clean up the sub process
	325	if (ExecWait(Process,Opts->Value.c_str()) == false)
90ecbd7d	326	return _error->Error("Failure running script %s",Opts->Value.c_str());
db0c350f AL	327	}
	328
	329	return true;
	330	}
	331
03e39e59 AL	332	/}}}/
	333	// DPkgPM::Go - Run the sequence /{{{/
	334	// ---------------------------------------------------------------------
	335	/* This globs the operations and calls dpkg */
	336	bool pkgDPkgPM::Go()
	337	{
6dd55be7 AL	338	if (RunScripts("DPkg::Pre-Invoke") == false)
6dd55be7 AL	339	return false;
db0c350f AL	340
	341	if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
	342	return false;
	343
03e39e59 AL	344	for (vector<Item>::iterator I = List.begin(); I != List.end();)
	345	{
	346	vector<Item>::iterator J = I;
	347	for (; J != List.end() && J->Op == I->Op; J++);
30e1eab5	348
03e39e59 AL	349	// Generate the argument list
	350	const char *Args[400];
	351	if (J - I > 350)
	352	J = I + 350;
	353
30e1eab5 AL	354	unsigned int n = 0;
	355	unsigned long Size = 0;
	356	Args[n++] = _config->Find("Dir::Bin::dpkg","dpkg").c_str();
	357	Size += strlen(Args[n-1]);
03e39e59	358
6dd55be7 AL	359	// Stick in any custom dpkg options
	360	Configuration::Item const *Opts = _config->Tree("DPkg::Options");
	361	if (Opts != 0)
	362	{
	363	Opts = Opts->Child;
	364	for (; Opts != 0; Opts = Opts->Next)
	365	{
	366	if (Opts->Value.empty() == true)
	367	continue;
	368	Args[n++] = Opts->Value.c_str();
	369	Size += Opts->Value.length();
	370	}
	371	}
	372
03e39e59 AL	373	switch (I->Op)
	374	{
	375	case Item::Remove:
	376	Args[n++] = "--force-depends";
30e1eab5	377	Size += strlen(Args[n-1]);
03e39e59	378	Args[n++] = "--force-remove-essential";
30e1eab5	379	Size += strlen(Args[n-1]);
03e39e59	380	Args[n++] = "--remove";
30e1eab5	381	Size += strlen(Args[n-1]);
03e39e59 AL	382	break;
03e39e59 AL	383
fc4b5c9f AL	384	case Item::Purge:
	385	Args[n++] = "--force-depends";
	386	Size += strlen(Args[n-1]);
	387	Args[n++] = "--force-remove-essential";
	388	Size += strlen(Args[n-1]);
	389	Args[n++] = "--purge";
	390	Size += strlen(Args[n-1]);
	391	break;
	392
03e39e59 AL	393	case Item::Configure:
03e39e59 AL	394	Args[n++] = "--configure";
30e1eab5	395	Size += strlen(Args[n-1]);
03e39e59 AL	396	break;
	397
	398	case Item::Install:
	399	Args[n++] = "--unpack";
30e1eab5	400	Size += strlen(Args[n-1]);
03e39e59 AL	401	break;
	402	}
	403
	404	// Write in the file or package names
	405	if (I->Op == Item::Install)
30e1eab5 AL	406	{
	407	for (;I != J && Size < 1024; I++)
	408	{
cf544e14 AL	409	if (I->File[0] != '/')
cf544e14 AL	410	return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
03e39e59	411	Args[n++] = I->File.c_str();
30e1eab5 AL	412	Size += strlen(Args[n-1]);
	413	}
	414	}
03e39e59	415	else
30e1eab5 AL	416	{
	417	for (;I != J && Size < 1024; I++)
	418	{
03e39e59	419	Args[n++] = I->Pkg.Name();
30e1eab5 AL	420	Size += strlen(Args[n-1]);
	421	}
	422	}
03e39e59	423	Args[n] = 0;
30e1eab5 AL	424	J = I;
	425
	426	if (_config->FindB("Debug::pkgDPkgPM",false) == true)
	427	{
	428	for (unsigned int k = 0; k != n; k++)
	429	clog << Args[k] << ' ';
	430	clog << endl;
	431	continue;
	432	}
03e39e59	433
03e39e59 AL	434	cout << flush;
	435	clog << flush;
	436	cerr << flush;
	437
	438	/* Mask off sig int/quit. We do this because dpkg also does when
	439	it forks scripts. What happens is that when you hit ctrl-c it sends
	440	it to all processes in the group. Since dpkg ignores the signal
	441	it doesn't die but we do! So we must also ignore it */
	442	signal(SIGQUIT,SIG_IGN);
	443	signal(SIGINT,SIG_IGN);
6dd55be7	444
03e39e59	445	// Fork dpkg
54676e1a	446	pid_t Child = ExecFork();
6dd55be7	447
03e39e59 AL	448	// This is the child
	449	if (Child == 0)
	450	{
cf544e14	451	if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
0dbb95d8	452	_exit(100);
03e39e59	453
8b5fe26c AL	454	if (_config->FindB("DPkg::FlushSTDIN",true) == true)
	455	{
	456	int Flags,dummy;
	457	if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
	458	_exit(100);
	459
	460	// Discard everything in stdin before forking dpkg
	461	if (fcntl(STDIN_FILENO,F_SETFL,Flags \| O_NONBLOCK) < 0)
	462	_exit(100);
	463
	464	while (read(STDIN_FILENO,&dummy,1) == 1);
	465
	466	if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
	467	_exit(100);
	468	}
03e39e59	469
03e39e59 AL	470	/* No Job Control Stop Env is a magic dpkg var that prevents it
03e39e59 AL	471	from using sigstop */
101030ab	472	putenv("DPKG_NO_TSTP=yes");
d568ed2d	473	execvp(Args[0],(char **)Args);
03e39e59	474	cerr << "Could not exec dpkg!" << endl;
0dbb95d8	475	_exit(100);
03e39e59 AL	476	}
	477
	478	// Wait for dpkg
	479	int Status = 0;
	480	while (waitpid(Child,&Status,0) != Child)
	481	{
	482	if (errno == EINTR)
	483	continue;
6dd55be7	484	RunScripts("DPkg::Post-Invoke");
03e39e59 AL	485	return _error->Errno("waitpid","Couldn't wait for subprocess");
03e39e59 AL	486	}
03e39e59 AL	487
	488	// Restore sig int/quit
	489	signal(SIGQUIT,SIG_DFL);
	490	signal(SIGINT,SIG_DFL);
6dd55be7 AL	491
	492	// Check for an error code.
	493	if (WIFEXITED(Status) == 0 \|\| WEXITSTATUS(Status) != 0)
	494	{
	495	RunScripts("DPkg::Post-Invoke");
f956efb4	496	if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
b2e465d6 AL	497	return _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
b2e465d6 AL	498
f956efb4	499	if (WIFEXITED(Status) != 0)
0410b3d5	500	return _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
f956efb4	501
0410b3d5	502	return _error->Error("Sub-process %s exited unexpectedly",Args[0]);
6dd55be7	503	}
03e39e59	504	}
6dd55be7 AL	505
	506	if (RunScripts("DPkg::Post-Invoke") == false)
	507	return false;
03e39e59 AL	508	return true;
	509	}
	510	/}}}/
281daf46 AL	511	// pkgDpkgPM::Reset - Dump the contents of the command list /{{{/
	512	// ---------------------------------------------------------------------
	513	/* */
	514	void pkgDPkgPM::Reset()
	515	{
	516	List.erase(List.begin(),List.end());
	517	}
	518	/}}}/