// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: dpkgpm.cc,v 1.11 1999/07/09 04:11:34 jgg Exp $
+// $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz 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 <sstream>
+#include <map>
+
+#include <config.h>
+#include <apti18n.h>
/*}}}*/
+using namespace std;
+
// DPkgPM::pkgDPkgPM - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
-pkgDPkgPM::pkgDPkgPM(pkgDepCache &Cache) : pkgPackageManager(Cache)
+pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache) : pkgPackageManager(Cache)
{
}
/*}}}*/
// Restore sig int/quit
signal(SIGQUIT,SIG_DFL);
signal(SIGINT,SIG_DFL);
-
+
// Check for an error code.
if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
{
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;
}
/*}}}*/
// DPkgPM::Go - Run the sequence /*{{{*/
// ---------------------------------------------------------------------
-/* This globs the operations and calls dpkg */
-bool pkgDPkgPM::Go()
+/* This globs the operations and calls dpkg
+ *
+ * If it is called with "OutStatusFd" set to a valid file descriptor
+ * apt will report the install progress over this fd. It maps the
+ * dpkg states a package goes through to human readable (and i10n-able)
+ * names and calculates a percentage for each step.
+*/
+bool pkgDPkgPM::Go(int OutStatusFd)
{
+ unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
+ unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
+
if (RunScripts("DPkg::Pre-Invoke") == false)
return false;
+
+ if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
+ return false;
+ // prepare the progress reporting
+ int Done = 0;
+ int Total = 0;
+ // map the dpkg states to the operations that are performed
+ // (this is sorted in the same way as Item::Ops)
+ static const struct DpkgState DpkgStatesOpMap[][5] = {
+ // Install operation
+ {
+ {"half-installed", _("Preparing %s")},
+ {"unpacked", _("Unpacking %s") },
+ NULL
+ },
+ // Configure operation
+ {
+ {"unpacked",_("Preparing to configure %s") },
+ {"half-configured", _("Configuring %s") },
+ { "installed", _("Installed %s")},
+ NULL
+ },
+ // Remove operation
+ {
+ {"half-configured", _("Preparing for removal of %s")},
+ {"half-installed", _("Removing %s")},
+ {"config-files", _("Removed %s")},
+ NULL
+ },
+ // Purge operation
+ {
+ {"config-files", _("Preparing for remove with config %s")},
+ {"not-installed", _("Removed with config %s")},
+ NULL
+ },
+ };
+
+ // the dpkg states that the pkg will run through, the string is
+ // the package, the vector contains the dpkg states that the package
+ // will go through
+ map<string,vector<struct DpkgState> > PackageOps;
+ // the dpkg states that are already done; the string is the package
+ // the int is the state that is already done (e.g. a package that is
+ // going to be install is already in state "half-installed")
+ map<string,int> PackageOpsDone;
+
+ // init the PackageOps map, go over the list of packages that
+ // that will be [installed|configured|removed|purged] and add
+ // them to the PackageOps map (the dpkg states it goes through)
+ // and the PackageOpsTranslations (human readable strings)
+ for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
+ {
+ string name = (*I).Pkg.Name();
+ PackageOpsDone[name] = 0;
+ for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; i++)
+ {
+ PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
+ Total++;
+ }
+ }
+
+ // this loop is runs once per operation
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
}
}
+ char status_fd_buf[20];
+ int fd[2];
+ pipe(fd);
+
+ Args[n++] = "--status-fd";
+ Size += strlen(Args[n-1]);
+ snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
+ Args[n++] = status_fd_buf;
+ Size += strlen(Args[n-1]);
+
switch (I->Op)
{
case Item::Remove:
// 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());
}
else
{
- for (;I != J && Size < 1024; I++)
+ for (;I != J && Size < MaxArgBytes; I++)
{
Args[n++] = I->Pkg.Name();
Size += strlen(Args[n-1]);
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();
+ sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
+ sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
+
+ // Fork dpkg
+ pid_t Child;
+ _config->Set("APT::Keep-Fds::",fd[1]);
+ 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);
+ close(fd[0]); // close the read end of the pipe
- // Discard everything in stdin before forking dpkg
- if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
+ if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
_exit(100);
- while (read(STDIN_FILENO,&dummy,1) == 1);
+ if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
+ {
+ 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);
+ putenv("DPKG_NO_TSTP=yes");
execvp(Args[0],(char **)Args);
cerr << "Could not exec dpkg!" << endl;
_exit(100);
}
+ // clear the Keep-Fd again
+ _config->Clear("APT::Keep-Fds",fd[1]);
+
// Wait for dpkg
int Status = 0;
- while (waitpid(Child,&Status,0) != Child)
- {
- if (errno == EINTR)
+
+ // we read from dpkg here
+ int _dpkgin = fd[0];
+ fcntl(_dpkgin, F_SETFL, O_NONBLOCK);
+ close(fd[1]); // close the write end of the pipe
+
+ // the read buffers for the communication with dpkg
+ char line[1024] = {0,};
+ char buf[2] = {0,0};
+
+ // the result of the waitpid call
+ int res;
+
+ while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
+ if(res < 0) {
+ // FIXME: move this to a function or something, looks ugly here
+ // error handling, waitpid returned -1
+ if (errno == EINTR)
+ continue;
+ RunScripts("DPkg::Post-Invoke");
+
+ // Restore sig int/quit
+ signal(SIGQUIT,old_SIGQUIT);
+ signal(SIGINT,old_SIGINT);
+ return _error->Errno("waitpid","Couldn't wait for subprocess");
+ }
+
+ // read a single char, make sure that the read can't block
+ // (otherwise we may leave zombies)
+ int len = read(_dpkgin, buf, 1);
+
+ // nothing to read, wait a bit for more
+ if(len <= 0)
+ {
+ usleep(1000);
continue;
- RunScripts("DPkg::Post-Invoke");
- return _error->Errno("waitpid","Couldn't wait for subprocess");
+ }
+
+ // sanity check (should never happen)
+ if(strlen(line) >= sizeof(line)-10)
+ {
+ _error->Error("got a overlong line from dpkg: '%s'",line);
+ line[0]=0;
+ }
+ // append to line, check if we got a complete line
+ strcat(line, buf);
+ if(buf[0] != '\n')
+ continue;
+
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ std::clog << "got from dpkg '" << line << "'" << std::endl;
+
+ // pass "error" and "conffile-prompt" messages from dpkg verbatim
+ if((strncmp(line,"error",strlen("error")) == 0) ||
+ (strncmp(line,"conffile-prompt",strlen("conffile-prompt")) == 0))
+ {
+ write(OutStatusFd, line, strlen(line));
+ line[0]=0;
+ continue;
+ }
+ // line contains the dpkg status info now. it has the form:
+ // 'status: <pkg>: <pkg qstate>' (see dpkg(1) for details)
+ char* list[5];
+ TokSplitString(':', line, list, 5);
+ char *pkg = list[1];
+ char *action = list[2];
+ vector<struct DpkgState> &states = PackageOps[pkg];
+ const char *next_action = states[PackageOpsDone[pkg]].state;
+ const char *translation = states[PackageOpsDone[pkg]].str;
+ char s[200];
+ snprintf(s, sizeof(s), translation, pkg);
+ // check if the package moved to the next dpkg state
+ if(next_action && (strcmp(action, next_action) == 0))
+ {
+ // we moved from one dpkg state to a new one, report that
+ PackageOpsDone[pkg]++;
+ Done++;
+ ostringstream status;
+ // build the status str
+ status << "pmstatus:" << pkg
+ << ":" << (Done/float(Total)*100.0)
+ << ":" << s
+ << endl;
+ if(OutStatusFd > 0)
+ write(OutStatusFd, status.str().c_str(), status.str().size());
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ {
+ std::clog << "send to fd: '" << status.str()
+ << "'" << std::endl;
+
+ }
+
+ }
+ if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
+ std::clog << "(parsed from dpkg) pkg: " << pkg
+ << " action: " << action << endl;
+
+ // reset the line buffer
+ line[0]=0;
}
+ close(_dpkgin);
// Restore sig int/quit
- signal(SIGQUIT,SIG_DFL);
- signal(SIGINT,SIG_DFL);
+ signal(SIGQUIT,old_SIGQUIT);
+ signal(SIGINT,old_SIGINT);
// 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.");
-
+ return _error->Error("Sub-process %s received a segmentation fault.",Args[0]);
+
if (WIFEXITED(Status) != 0)
- return _error->Error("Sub-process returned an error code (%u)",WEXITSTATUS(Status));
+ return _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
- return _error->Error("Sub-process exited unexpectedly");
+ return _error->Error("Sub-process %s exited unexpectedly",Args[0]);
}
}
projects / apt.git / blobdiff