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

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: dpkgpm.cc,v 1.7 1999/01/31 08:55:53 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 = fork();
   if (Child < 0)
      return _error->Errno("fork","Could't fork");
   
   // This is the child
   if (Child == 0)
   {
      signal(SIGPIPE,SIG_DFL);
      signal(SIGQUIT,SIG_DFL);
      signal(SIGINT,SIG_DFL);
      signal(SIGWINCH,SIG_DFL);
      signal(SIGCONT,SIG_DFL);
      signal(SIGTSTP,SIG_DFL);
      
      if (chdir("/tmp/") != 0)
	 _exit(100);
	 
      // Close all of our FDs - just in case
      for (int K = 3; K != 40; K++)
	 fcntl(K,F_SETFD,FD_CLOEXEC);

      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 = fork();
      if (Child < 0)
	 return _error->Errno("fork","Could't fork");
            
      // This is the child
      if (Child == 0)
      {
	 signal(SIGPIPE,SIG_DFL);
	 signal(SIGQUIT,SIG_DFL);
	 signal(SIGINT,SIG_DFL);
	 signal(SIGWINCH,SIG_DFL);
	 signal(SIGCONT,SIG_DFL);
	 signal(SIGTSTP,SIG_DFL);
	 
	 if (chdir(_config->FindDir("DPkg::Run-Directory","/").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(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");
	 return _error->Error("Sub-process returned an error code");
      }      
   }

   if (RunScripts("DPkg::Post-Invoke") == false)
      return false;
   return true;
}
									/*}}}*/
Commit	Line	Data
03e39e59 AL	1	// -- mode: cpp; mode: fold --
03e39e59 AL	2	// Description /{{{/
cf544e14	3	// $Id: dpkgpm.cc,v 1.7 1999/01/31 08:55:53 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>
	17
	18	#include <unistd.h>
	19	#include <stdlib.h>
	20	#include <fcntl.h>
	21	#include <sys/types.h>
	22	#include <sys/wait.h>
	23	#include <signal.h>
	24	#include <errno.h>
	25	/}}}/
	26
	27	// DPkgPM::pkgDPkgPM - Constructor /{{{/
	28	// ---------------------------------------------------------------------
	29	/* */
	30	pkgDPkgPM::pkgDPkgPM(pkgDepCache &Cache) : pkgPackageManager(Cache)
	31	{
	32	}
	33	/}}}/
	34	// DPkgPM::pkgDPkgPM - Destructor /{{{/
	35	// ---------------------------------------------------------------------
	36	/* */
	37	pkgDPkgPM::~pkgDPkgPM()
	38	{
	39	}
	40	/}}}/
	41	// DPkgPM::Install - Install a package /{{{/
	42	// ---------------------------------------------------------------------
	43	/* Add an install operation to the sequence list */
	44	bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
	45	{
	46	if (File.empty() == true \|\| Pkg.end() == true)
	47	return _error->Error("Internal Error, No file name for %s",Pkg.Name());
	48
	49	List.push_back(Item(Item::Install,Pkg,File));
	50	return true;
	51	}
	52	/}}}/
	53	// DPkgPM::Configure - Configure a package /{{{/
	54	// ---------------------------------------------------------------------
	55	/* Add a configure operation to the sequence list */
	56	bool pkgDPkgPM::Configure(PkgIterator Pkg)
	57	{
	58	if (Pkg.end() == true)
	59	return false;
	60
	61	List.push_back(Item(Item::Configure,Pkg));
	62	return true;
	63	}
	64	/}}}/
	65	// DPkgPM::Remove - Remove a package /{{{/
	66	// ---------------------------------------------------------------------
	67	/* Add a remove operation to the sequence list */
68	bool pkgDPkgPM::Remove(PkgIterator Pkg)
69	{
70	if (Pkg.end() == true)
71	return false;
72
73	List.push_back(Item(Item::Remove,Pkg));
6dd55be7 AL	74	return true;
	75	}
	76	/}}}/
	77	// DPkgPM::RunScripts - Run a set of scripts /{{{/
	78	// ---------------------------------------------------------------------
	79	/* This looks for a list of script sto run from the configuration file,
	80	each one is run with system from a forked child. */
	81	bool pkgDPkgPM::RunScripts(const char *Cnf)
	82	{
	83	Configuration::Item const *Opts = _config->Tree(Cnf);
	84	if (Opts == 0 \|\| Opts->Child == 0)
	85	return true;
	86	Opts = Opts->Child;
	87
	88	// Fork for running the system calls
	89	pid_t Child = fork();
	90	if (Child < 0)
	91	return _error->Errno("fork","Could't fork");
	92
	93	// This is the child
	94	if (Child == 0)
	95	{
	96	signal(SIGPIPE,SIG_DFL);
	97	signal(SIGQUIT,SIG_DFL);
	98	signal(SIGINT,SIG_DFL);
	99	signal(SIGWINCH,SIG_DFL);
	100	signal(SIGCONT,SIG_DFL);
	101	signal(SIGTSTP,SIG_DFL);
	102
	103	if (chdir("/tmp/") != 0)
	104	_exit(100);
	105
	106	// Close all of our FDs - just in case
	107	for (int K = 3; K != 40; K++)
	108	fcntl(K,F_SETFD,FD_CLOEXEC);
	109
	110	unsigned int Count = 1;
	111	for (; Opts != 0; Opts = Opts->Next, Count++)
	112	{
	113	if (Opts->Value.empty() == true)
	114	continue;
	115
	116	if (system(Opts->Value.c_str()) != 0)
	117	_exit(100+Count);
	118	}
	119	_exit(0);
	120	}
	121
	122	// Wait for the child
	123	int Status = 0;
	124	while (waitpid(Child,&Status,0) != Child)
	125	{
	126	if (errno == EINTR)
	127	continue;
	128	return _error->Errno("waitpid","Couldn't wait for subprocess");
	129	}
	130
	131	// Restore sig int/quit
	132	signal(SIGQUIT,SIG_DFL);
	133	signal(SIGINT,SIG_DFL);
	134
	135	// Check for an error code.
	136	if (WIFEXITED(Status) == 0 \|\| WEXITSTATUS(Status) != 0)
	137	{
138	unsigned int Count = WEXITSTATUS(Status);
139	if (Count > 100)
140	{
141	Count -= 100;
142	for (; Opts != 0 && Count != 1; Opts = Opts->Next, Count--);
cf544e14	143	_error->Error("Problem executing scripts %s '%s'",Cnf,Opts->Value.c_str());
6dd55be7 AL	144	}
	145
	146	return _error->Error("Sub-process returned an error code");
	147	}
	148
03e39e59 AL	149	return true;
	150	}
	151	/}}}/
	152	// DPkgPM::Go - Run the sequence /{{{/
	153	// ---------------------------------------------------------------------
	154	/* This globs the operations and calls dpkg */
	155	bool pkgDPkgPM::Go()
	156	{
6dd55be7 AL	157	if (RunScripts("DPkg::Pre-Invoke") == false)
	158	return false;
	159
03e39e59 AL	160	for (vector<Item>::iterator I = List.begin(); I != List.end();)
	161	{
	162	vector<Item>::iterator J = I;
	163	for (; J != List.end() && J->Op == I->Op; J++);
30e1eab5	164
03e39e59 AL	165	// Generate the argument list
	166	const char *Args[400];
	167	if (J - I > 350)
	168	J = I + 350;
	169
30e1eab5 AL	170	unsigned int n = 0;
	171	unsigned long Size = 0;
	172	Args[n++] = _config->Find("Dir::Bin::dpkg","dpkg").c_str();
	173	Size += strlen(Args[n-1]);
03e39e59	174
6dd55be7 AL	175	// Stick in any custom dpkg options
	176	Configuration::Item const *Opts = _config->Tree("DPkg::Options");
	177	if (Opts != 0)
	178	{
	179	Opts = Opts->Child;
	180	for (; Opts != 0; Opts = Opts->Next)
	181	{
	182	if (Opts->Value.empty() == true)
	183	continue;
	184	Args[n++] = Opts->Value.c_str();
	185	Size += Opts->Value.length();
	186	}
	187	}
	188
03e39e59 AL	189	switch (I->Op)
	190	{
	191	case Item::Remove:
	192	Args[n++] = "--force-depends";
30e1eab5	193	Size += strlen(Args[n-1]);
03e39e59	194	Args[n++] = "--force-remove-essential";
30e1eab5	195	Size += strlen(Args[n-1]);
03e39e59	196	Args[n++] = "--remove";
30e1eab5	197	Size += strlen(Args[n-1]);
03e39e59 AL	198	break;
	199
	200	case Item::Configure:
	201	Args[n++] = "--configure";
30e1eab5	202	Size += strlen(Args[n-1]);
03e39e59 AL	203	break;
	204
	205	case Item::Install:
	206	Args[n++] = "--unpack";
30e1eab5	207	Size += strlen(Args[n-1]);
03e39e59 AL	208	break;
	209	}
	210
	211	// Write in the file or package names
	212	if (I->Op == Item::Install)
30e1eab5 AL	213	{
	214	for (;I != J && Size < 1024; I++)
	215	{
cf544e14 AL	216	if (I->File[0] != '/')
cf544e14 AL	217	return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
03e39e59	218	Args[n++] = I->File.c_str();
30e1eab5 AL	219	Size += strlen(Args[n-1]);
	220	}
	221	}
03e39e59	222	else
30e1eab5 AL	223	{
	224	for (;I != J && Size < 1024; I++)
	225	{
03e39e59	226	Args[n++] = I->Pkg.Name();
30e1eab5 AL	227	Size += strlen(Args[n-1]);
	228	}
	229	}
03e39e59	230	Args[n] = 0;
30e1eab5 AL	231	J = I;
	232
	233	if (_config->FindB("Debug::pkgDPkgPM",false) == true)
	234	{
	235	for (unsigned int k = 0; k != n; k++)
	236	clog << Args[k] << ' ';
	237	clog << endl;
	238	continue;
	239	}
03e39e59	240
03e39e59 AL	241	cout << flush;
	242	clog << flush;
	243	cerr << flush;
	244
	245	/* Mask off sig int/quit. We do this because dpkg also does when
	246	it forks scripts. What happens is that when you hit ctrl-c it sends
	247	it to all processes in the group. Since dpkg ignores the signal
	248	it doesn't die but we do! So we must also ignore it */
	249	signal(SIGQUIT,SIG_IGN);
	250	signal(SIGINT,SIG_IGN);
6dd55be7	251
03e39e59 AL	252	// Fork dpkg
	253	pid_t Child = fork();
	254	if (Child < 0)
	255	return _error->Errno("fork","Could't fork");
6dd55be7	256
03e39e59 AL	257	// This is the child
	258	if (Child == 0)
	259	{
d38b7b3d	260	signal(SIGPIPE,SIG_DFL);
03e39e59 AL	261	signal(SIGQUIT,SIG_DFL);
	262	signal(SIGINT,SIG_DFL);
	263	signal(SIGWINCH,SIG_DFL);
	264	signal(SIGCONT,SIG_DFL);
	265	signal(SIGTSTP,SIG_DFL);
6dd55be7	266
cf544e14	267	if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
0dbb95d8	268	_exit(100);
03e39e59 AL	269
	270	// Close all of our FDs - just in case
	271	for (int K = 3; K != 40; K++)
	272	fcntl(K,F_SETFD,FD_CLOEXEC);
	273
	274	int Flags,dummy;
	275	if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
0dbb95d8	276	_exit(100);
03e39e59 AL	277
	278	// Discard everything in stdin before forking dpkg
	279	if (fcntl(STDIN_FILENO,F_SETFL,Flags \| O_NONBLOCK) < 0)
0dbb95d8	280	_exit(100);
03e39e59 AL	281
	282	while (read(STDIN_FILENO,&dummy,1) == 1);
	283
	284	if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
0dbb95d8	285	_exit(100);
03e39e59 AL	286
	287	/* No Job Control Stop Env is a magic dpkg var that prevents it
	288	from using sigstop */
	289	setenv("DPKG_NO_TSTP","yes",1);
d568ed2d	290	execvp(Args[0],(char **)Args);
03e39e59	291	cerr << "Could not exec dpkg!" << endl;
0dbb95d8	292	_exit(100);
03e39e59 AL	293	}
	294
	295	// Wait for dpkg
	296	int Status = 0;
	297	while (waitpid(Child,&Status,0) != Child)
	298	{
	299	if (errno == EINTR)
	300	continue;
6dd55be7	301	RunScripts("DPkg::Post-Invoke");
03e39e59 AL	302	return _error->Errno("waitpid","Couldn't wait for subprocess");
03e39e59 AL	303	}
03e39e59 AL	304
	305	// Restore sig int/quit
	306	signal(SIGQUIT,SIG_DFL);
	307	signal(SIGINT,SIG_DFL);
6dd55be7 AL	308
	309	// Check for an error code.
	310	if (WIFEXITED(Status) == 0 \|\| WEXITSTATUS(Status) != 0)
	311	{
	312	RunScripts("DPkg::Post-Invoke");
	313	return _error->Error("Sub-process returned an error code");
	314	}
03e39e59	315	}
6dd55be7 AL	316
	317	if (RunScripts("DPkg::Post-Invoke") == false)
	318	return false;
03e39e59 AL	319	return true;
	320	}
	321	/}}}/