// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: dpkgpm.cc,v 1.3 1998/11/23 07:03:11 jgg Exp $
+// $Id: dpkgpm.cc,v 1.26 2003/04/27 03:02:40 doogie Exp $
/* ######################################################################
DPKG Package Manager - Provide an interface to dpkg
#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 <sys/wait.h>
#include <signal.h>
#include <errno.h>
+#include <stdio.h>
+#include <iostream>
/*}}}*/
+using namespace std;
+
// DPkgPM::pkgDPkgPM - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
-pkgDPkgPM::pkgDPkgPM(pkgDepCache &Cache) : pkgPackageManager(Cache)
+pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache) : pkgPackageManager(Cache)
{
}
/*}}}*/
// DPkgPM::Remove - Remove a package /*{{{*/
// ---------------------------------------------------------------------
/* Add a remove operation to the sequence list */
-bool pkgDPkgPM::Remove(PkgIterator Pkg)
+bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
{
if (Pkg.end() == true)
return false;
- List.push_back(Item(Item::Remove,Pkg));
+ 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;
}
/*}}}*/
/* This globs the operations and calls dpkg */
bool pkgDPkgPM::Go()
{
+ unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",350);
+ unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",8192);
+
+ 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;
+ const char *Args[MaxArgs + 50];
+ if (J - I > (signed)MaxArgs)
+ J = I + MaxArgs;
unsigned int n = 0;
unsigned long Size = 0;
- Args[n++] = _config->Find("Dir::Bin::dpkg","dpkg").c_str();
+ 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();
+ }
+ }
+
switch (I->Op)
{
case Item::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]);
// Write in the file or package names
if (I->Op == Item::Install)
{
- for (;I != J && Size < 1024; I++)
+ 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 < 1024; I++)
+ for (;I != J && Size < MaxArgBytes; I++)
{
Args[n++] = I->Pkg.Name();
Size += strlen(Args[n-1]);
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");
-
+ pid_t Child = ExecFork();
+
// 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("Dir::Cache::Archives").c_str()) != 0)
- exit(100);
+ 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 (_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);
+ }
- 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);
+ putenv("DPKG_NO_TSTP=yes");
+ execvp(Args[0],(char **)Args);
cerr << "Could not exec dpkg!" << endl;
- exit(100);
+ _exit(100);
}
// Wait for dpkg
{
if (errno == EINTR)
continue;
+ RunScripts("DPkg::Post-Invoke");
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);
+
+ // 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());
+}
+ /*}}}*/
projects / apt.git / blobdiff