if file is inaccessible for _apt, disable privilege drop in acquire

[apt.git] / cmdline / apt-internal-solver.cc

diff --git a/cmdline/apt-internal-solver.cc b/cmdline/apt-internal-solver.cc
index bf5b8c1feacdbf233dfd556ebd5b43056e6e2172..af301dbcd7dd0201e7d5478a43cb8ff07c3a7f74 100644 (file)
--- a/cmdline/apt-internal-solver.cc
+++ b/cmdline/apt-internal-solver.cc
@@ -20,9 +20,22 @@
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/pkgsystem.h>
 #include <apt-pkg/upgrade.h>
-
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/cacheiterators.h>
+
+#include <apt-private/private-output.h>
+#include <apt-private/private-cmndline.h>
+
+#include <string.h>
+#include <iostream>
+#include <sstream>
+#include <list>
+#include <string>
 #include <unistd.h>
 #include <cstdio>
+#include <stdlib.h>
 
 #include <apti18n.h>
                                                                        /*}}}*/
@@ -30,9 +43,8 @@
 // ShowHelp - Show a help screen                                       /*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool ShowHelp(CommandLine &CmdL) {
-       ioprintf(std::cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,PACKAGE_VERSION,
-                COMMON_ARCH,__DATE__,__TIME__);
+static bool ShowHelp(CommandLine &) {
+       ioprintf(std::cout, "%s %s (%s)\n", PACKAGE, PACKAGE_VERSION, COMMON_ARCH);
 
        std::cout <<
                _("Usage: apt-internal-solver\n"
@@ -48,6 +60,12 @@ bool ShowHelp(CommandLine &CmdL) {
        return true;
 }
                                                                        /*}}}*/
+APT_NORETURN static void DIE(std::string const &message) {             /*{{{*/
+       std::cerr << "ERROR: " << message << std::endl;
+       _error->DumpErrors(std::cerr);
+       exit(EXIT_FAILURE);
+}
+                                                                       /*}}}*/
 int main(int argc,const char *argv[])                                  /*{{{*/
 {
        CommandLine::Args Args[] = {
@@ -59,19 +77,11 @@ int main(int argc,const char *argv[])                                       /*{{{*/
                {'o',"option",0,CommandLine::ArbItem},
                {0,0,0,0}};
 
-       CommandLine CmdL(Args,_config);
-       if (pkgInitConfig(*_config) == false ||
-           CmdL.Parse(argc,argv) == false) {
-               _error->DumpErrors();
-               return 2;
-       }
+        // we really don't need anything
+        DropPrivileges();
 
-       // See if the help should be shown
-       if (_config->FindB("help") == true ||
-           _config->FindB("version") == true) {
-               ShowHelp(CmdL);
-               return 1;
-       }
+       CommandLine CmdL;
+       ParseCommandLine(CmdL, NULL, Args, &_config, NULL, argc, argv, ShowHelp);
 
        if (CmdL.FileList[0] != 0 && strcmp(CmdL.FileList[0], "scenario") == 0)
        {
@@ -99,6 +109,7 @@ int main(int argc,const char *argv[])                                        /*{{{*/
        if (_config->FindI("quiet", 0) < 1)
                _config->Set("Debug::EDSP::WriteSolution", true);
 
+       _config->Set("APT::System", "Debian APT solver interface");
        _config->Set("APT::Solver", "internal");
        _config->Set("edsp::scenario", "stdin");
        int input = STDIN_FILENO;
@@ -107,34 +118,29 @@ int main(int argc,const char *argv[])                                     /*{{{*/
 
        EDSP::WriteProgress(0, "Start up solver…", output);
 
-       if (pkgInitSystem(*_config,_system) == false) {
-               std::cerr << "System could not be initialized!" << std::endl;
-               return 1;
-       }
+       if (pkgInitSystem(*_config,_system) == false)
+               DIE("System could not be initialized!");
 
        EDSP::WriteProgress(1, "Read request…", output);
 
        if (WaitFd(input, false, 5) == false)
-               std::cerr << "WAIT timed out in the resolver" << std::endl;
+               DIE("WAIT timed out in the resolver");
 
        std::list<std::string> install, remove;
        bool upgrade, distUpgrade, autoRemove;
-       if (EDSP::ReadRequest(input, install, remove, upgrade, distUpgrade, autoRemove) == false) {
-               std::cerr << "Parsing the request failed!" << std::endl;
-               return 2;
-       }
+       if (EDSP::ReadRequest(input, install, remove, upgrade, distUpgrade, autoRemove) == false)
+               DIE("Parsing the request failed!");
 
        EDSP::WriteProgress(5, "Read scenario…", output);
 
        pkgCacheFile CacheFile;
-       CacheFile.Open(NULL, false);
+       if (CacheFile.Open(NULL, false) == false)
+               DIE("Failed to open CacheFile!");
 
        EDSP::WriteProgress(50, "Apply request on scenario…", output);
 
-       if (EDSP::ApplyRequest(install, remove, CacheFile) == false) {
-               std::cerr << "Failed to apply request to depcache!" << std::endl;
-               return 3;
-       }
+       if (EDSP::ApplyRequest(install, remove, CacheFile) == false)
+               DIE("Failed to apply request to depcache!");
 
        pkgProblemResolver Fix(CacheFile);
        for (std::list<std::string>::const_iterator i = remove.begin();
@@ -158,27 +164,27 @@ int main(int argc,const char *argv[])                                     /*{{{*/
 
        EDSP::WriteProgress(60, "Call problemresolver on current scenario…", output);
 
+       std::string failure;
        if (upgrade == true) {
-               if (pkgAllUpgrade(CacheFile) == false) {
-                       EDSP::WriteError("ERR_UNSOLVABLE_UPGRADE", "An upgrade error occurred", output);
-                       return 0;
-               }
+               if (APT::Upgrade::Upgrade(CacheFile, APT::Upgrade::FORBID_REMOVE_PACKAGES | APT::Upgrade::FORBID_INSTALL_NEW_PACKAGES) == false)
+                       failure = "ERR_UNSOLVABLE_UPGRADE";
        } else if (distUpgrade == true) {
-               if (pkgDistUpgrade(CacheFile) == false) {
-                       EDSP::WriteError("ERR_UNSOLVABLE_DIST_UPGRADE", "An dist-upgrade error occurred", output);
-                       return 0;
-               }
-       } else if (Fix.Resolve() == false) {
-               EDSP::WriteError("ERR_UNSOLVABLE", "An error occurred", output);
+               if (APT::Upgrade::Upgrade(CacheFile, APT::Upgrade::ALLOW_EVERYTHING) == false)
+                       failure = "ERR_UNSOLVABLE_DIST_UPGRADE";
+       } else if (Fix.Resolve() == false)
+               failure = "ERR_UNSOLVABLE";
+
+       if (failure.empty() == false) {
+               std::ostringstream broken;
+               ShowBroken(broken, CacheFile, false);
+               EDSP::WriteError(failure.c_str(), broken.str(), output);
                return 0;
        }
 
        EDSP::WriteProgress(95, "Write solution…", output);
 
-       if (EDSP::WriteSolution(CacheFile, output) == false) {
-               std::cerr << "Failed to output the solution!" << std::endl;
-               return 4;
-       }
+       if (EDSP::WriteSolution(CacheFile, output) == false)
+               DIE("Failed to output the solution!");
 
        EDSP::WriteProgress(100, "Done", output);