From 7187074bfc7a6932ab21c33546e71b61abe258e3 Mon Sep 17 00:00:00 2001 From: John Ogness Date: Mon, 21 Apr 2014 11:54:34 +0200 Subject: [PATCH 1/1] properly undo CD-ROM mount in all error cases In bug #740673 various issues in the CD-ROM handling code were identified, while most the issues ended up being fixed in another way, the unmounting of the CD-ROM in error cases was not tackled so far. (The patch was modified by the commiter to apply) --- apt-pkg/cdrom.cc | 66 ++++++++++++++++++++++++++++++------------------ apt-pkg/cdrom.h | 1 + 2 files changed, 42 insertions(+), 25 deletions(-) diff --git a/apt-pkg/cdrom.cc b/apt-pkg/cdrom.cc index 2635ede76..a5ad6a9ff 100644 --- a/apt-pkg/cdrom.cc +++ b/apt-pkg/cdrom.cc @@ -563,6 +563,15 @@ bool pkgCdrom::WriteSourceList(string Name,vector &List,bool Source) return true; } /*}}}*/ +bool pkgCdrom::UnmountCDROM(std::string const &CDROM, pkgCdromStatus * const log)/*{{{*/ +{ + if (_config->FindB("APT::CDROM::NoMount",false) == true) + return true; + if (log != NULL) + log->Update(_("Unmounting CD-ROM...\n"), STEP_LAST); + return UnmountCdrom(CDROM); +} + /*}}}*/ bool pkgCdrom::MountAndIdentCDROM(Configuration &Database, std::string &CDROM, std::string &ident, pkgCdromStatus * const log, bool const interactive)/*{{{*/ { // Startup @@ -583,9 +592,7 @@ bool pkgCdrom::MountAndIdentCDROM(Configuration &Database, std::string &CDROM, s { if (interactive == true) { - if(log != NULL) - log->Update(_("Unmounting CD-ROM...\n"), STEP_LAST); - UnmountCdrom(CDROM); + UnmountCDROM(CDROM, log); if(log != NULL) { @@ -605,6 +612,9 @@ bool pkgCdrom::MountAndIdentCDROM(Configuration &Database, std::string &CDROM, s return _error->Error("Failed to mount the cdrom."); } + if (IsMounted(CDROM) == false) + return _error->Error("Failed to mount the cdrom."); + // Hash the CD to get an ID if (log != NULL) log->Update(_("Identifying... "), STEP_IDENT); @@ -614,6 +624,7 @@ bool pkgCdrom::MountAndIdentCDROM(Configuration &Database, std::string &CDROM, s ident = ""; if (log != NULL) log->Update("\n"); + UnmountCDROM(CDROM, NULL); return false; } @@ -629,8 +640,11 @@ bool pkgCdrom::MountAndIdentCDROM(Configuration &Database, std::string &CDROM, s if (FileExists(DFile) == true) { if (ReadConfigFile(Database,DFile) == false) + { + UnmountCDROM(CDROM, NULL); return _error->Error("Unable to read the cdrom database %s", DFile.c_str()); + } } return true; } @@ -651,13 +665,7 @@ bool pkgCdrom::Ident(string &ident, pkgCdromStatus *log) /*{{{*/ } // Unmount and finish - if (_config->FindB("APT::CDROM::NoMount",false) == false) - { - if (log != NULL) - log->Update(_("Unmounting CD-ROM...\n"), STEP_LAST); - UnmountCdrom(CDROM); - } - + UnmountCDROM(CDROM, log); return true; } /*}}}*/ @@ -682,11 +690,15 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ { if (log != NULL) log->Update("\n"); + UnmountCDROM(CDROM, NULL); return false; } if (chdir(StartDir.c_str()) != 0) + { + UnmountCDROM(CDROM, NULL); return _error->Errno("chdir","Unable to change to %s", StartDir.c_str()); + } if (_config->FindB("Debug::aptcdrom",false) == true) { @@ -728,8 +740,7 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ if (List.empty() == true && SourceList.empty() == true) { - if (_config->FindB("APT::CDROM::NoMount",false) == false) - UnmountCdrom(CDROM); + UnmountCDROM(CDROM, NULL); return _error->Error(_("Unable to locate any package files, perhaps this is not a Debian Disc or the wrong architecture?")); } @@ -769,14 +780,14 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ { if(log == NULL) { - if (_config->FindB("APT::CDROM::NoMount",false) == false) - UnmountCdrom(CDROM); + UnmountCDROM(CDROM, NULL); return _error->Error("No disc name found and no way to ask for it"); } while(true) { if(!log->AskCdromName(Name)) { // user canceld + UnmountCDROM(CDROM, NULL); return false; } cout << "Name: '" << Name << "'" << endl; @@ -813,7 +824,10 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ string const partialListDir = listDir + "partial/"; if (CreateAPTDirectoryIfNeeded(_config->FindDir("Dir::State"), partialListDir) == false && CreateAPTDirectoryIfNeeded(listDir, partialListDir) == false) + { + UnmountCDROM(CDROM, NULL); return _error->Errno("cdrom", _("List directory %spartial is missing."), listDir.c_str()); + } // take care of the signatures and copy them if they are ok // (we do this before PackageCopy as it modifies "List" and "SourceList") @@ -827,7 +841,10 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ if (Copy.CopyPackages(CDROM,Name,List, log) == false || SrcCopy.CopyPackages(CDROM,Name,SourceList, log) == false || TransCopy.CopyTranslations(CDROM,Name,TransList, log) == false) + { + UnmountCDROM(CDROM, NULL); return false; + } // reduce the List so that it takes less space in sources.list ReduceSourcelist(CDROM,List); @@ -837,13 +854,19 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ if (_config->FindB("APT::cdrom::NoAct",false) == false) { if (WriteDatabase(Database) == false) + { + UnmountCDROM(CDROM, NULL); return false; - + } + if(log != NULL) log->Update(_("Writing new source list\n"), STEP_WRITE); if (WriteSourceList(Name,List,false) == false || WriteSourceList(Name,SourceList,true) == false) + { + UnmountCDROM(CDROM, NULL); return false; + } } // Print the sourcelist entries @@ -855,8 +878,7 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ string::size_type Space = (*I).find(' '); if (Space == string::npos) { - if (_config->FindB("APT::CDROM::NoMount",false) == false) - UnmountCdrom(CDROM); + UnmountCDROM(CDROM, NULL); return _error->Error("Internal error"); } @@ -874,8 +896,7 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ string::size_type Space = (*I).find(' '); if (Space == string::npos) { - if (_config->FindB("APT::CDROM::NoMount",false) == false) - UnmountCdrom(CDROM); + UnmountCDROM(CDROM, NULL); return _error->Error("Internal error"); } @@ -888,12 +909,7 @@ bool pkgCdrom::Add(pkgCdromStatus *log) /*{{{*/ } // Unmount and finish - if (_config->FindB("APT::CDROM::NoMount",false) == false) { - if (log != NULL) - log->Update(_("Unmounting CD-ROM...\n"), STEP_LAST); - UnmountCdrom(CDROM); - } - + UnmountCDROM(CDROM, log); return true; } /*}}}*/ diff --git a/apt-pkg/cdrom.h b/apt-pkg/cdrom.h index 0f2c2cd02..bd0902176 100644 --- a/apt-pkg/cdrom.h +++ b/apt-pkg/cdrom.h @@ -77,6 +77,7 @@ class pkgCdrom /*{{{*/ private: APT_HIDDEN bool MountAndIdentCDROM(Configuration &Database, std::string &CDROM, std::string &ident, pkgCdromStatus * const log, bool const interactive); + APT_HIDDEN bool UnmountCDROM(std::string const &CDROM, pkgCdromStatus * const log); }; /*}}}*/ -- 2.45.2