X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/73437844e2f22a17203dac0ba72317769ec54398..e6645b9fb9ba3a7ff7b6663af3f5e1bcb6f23d78:/apt-pkg/contrib/fileutl.cc diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc index 25ac5275c..d2be276c7 100644 --- a/apt-pkg/contrib/fileutl.cc +++ b/apt-pkg/contrib/fileutl.cc @@ -41,15 +41,16 @@ #include #include #include +#include + #include #include -// FIXME: Compressor Fds have some speed disadvantages and are a bit buggy currently, -// so while the current implementation satisfies the testcases it is not a real option -// to disable it for now -#define APT_USE_ZLIB 1 -#ifdef APT_USE_ZLIB -#include +#ifdef HAVE_ZLIB + #include +#endif +#ifdef HAVE_BZ2 + #include #endif #ifdef WORDS_BIGENDIAN @@ -63,16 +64,50 @@ using namespace std; class FileFdPrivate { public: -#ifdef APT_USE_ZLIB +#ifdef HAVE_ZLIB gzFile gz; #else void* gz; #endif +#ifdef HAVE_BZ2 + BZFILE* bz2; +#else + void* bz2; +#endif + int compressed_fd; pid_t compressor_pid; bool pipe; APT::Configuration::Compressor compressor; - FileFd::OpenMode openmode; - FileFdPrivate() : gz(NULL), compressor_pid(-1), pipe(false) {}; + unsigned int openmode; + unsigned long long seekpos; + FileFdPrivate() : gz(NULL), bz2(NULL), + compressed_fd(-1), compressor_pid(-1), pipe(false), + openmode(0), seekpos(0) {}; + bool CloseDown(std::string const &FileName) + { + bool Res = true; +#ifdef HAVE_ZLIB + if (gz != NULL) { + int const e = gzclose(gz); + gz = NULL; + // gzdclose() on empty files always fails with "buffer error" here, ignore that + if (e != 0 && e != Z_BUF_ERROR) + Res &= _error->Errno("close",_("Problem closing the gzip file %s"), FileName.c_str()); + } +#endif +#ifdef HAVE_BZ2 + if (bz2 != NULL) { + BZ2_bzclose(bz2); + bz2 = NULL; + } +#endif + if (compressor_pid > 0) + ExecWait(compressor_pid, "FileFdCompressor", true); + compressor_pid = -1; + + return Res; + } + ~FileFdPrivate() { CloseDown(""); } }; // RunScripts - Run a set of scripts from a configuration subtree /*{{{*/ @@ -151,7 +186,8 @@ bool RunScripts(const char *Cnf) /* The caller is expected to set things so that failure causes erasure */ bool CopyFile(FileFd &From,FileFd &To) { - if (From.IsOpen() == false || To.IsOpen() == false) + if (From.IsOpen() == false || To.IsOpen() == false || + From.Failed() == true || To.Failed() == true) return false; // Buffered copy between fds @@ -210,17 +246,20 @@ int GetLock(string File,bool Errors) fl.l_len = 0; if (fcntl(FD,F_SETLK,&fl) == -1) { + // always close to not leak resources + int Tmp = errno; + close(FD); + errno = Tmp; + if (errno == ENOLCK) { _error->Warning(_("Not using locking for nfs mounted lock file %s"),File.c_str()); return dup(0); // Need something for the caller to close - } + } + if (Errors == true) _error->Errno("open",_("Could not get lock %s"),File.c_str()); - int Tmp = errno; - close(FD); - errno = Tmp; return -1; } @@ -354,7 +393,7 @@ std::vector GetListOfFilesInDir(string const &Dir, std::vector c std::vector List; - if (DirectoryExists(Dir.c_str()) == false) + if (DirectoryExists(Dir) == false) { _error->Error(_("List of files can't be created as '%s' is not a directory"), Dir.c_str()); return List; @@ -380,8 +419,15 @@ std::vector GetListOfFilesInDir(string const &Dir, std::vector c if (Ent->d_type != DT_REG) #endif { - if (RealFileExists(File.c_str()) == false) + if (RealFileExists(File) == false) { + // do not show ignoration warnings for directories + if ( +#ifdef _DIRENT_HAVE_D_TYPE + Ent->d_type == DT_DIR || +#endif + DirectoryExists(File) == true) + continue; if (SilentIgnore.Match(Ent->d_name) == false) _error->Notice(_("Ignoring '%s' in directory '%s' as it is not a regular file"), Ent->d_name, Dir.c_str()); continue; @@ -449,6 +495,80 @@ std::vector GetListOfFilesInDir(string const &Dir, std::vector c } closedir(D); + if (SortList == true) + std::sort(List.begin(),List.end()); + return List; +} +std::vector GetListOfFilesInDir(string const &Dir, bool SortList) +{ + bool const Debug = _config->FindB("Debug::GetListOfFilesInDir", false); + if (Debug == true) + std::clog << "Accept in " << Dir << " all regular files" << std::endl; + + std::vector List; + + if (DirectoryExists(Dir) == false) + { + _error->Error(_("List of files can't be created as '%s' is not a directory"), Dir.c_str()); + return List; + } + + DIR *D = opendir(Dir.c_str()); + if (D == 0) + { + _error->Errno("opendir",_("Unable to read %s"),Dir.c_str()); + return List; + } + + for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D)) + { + // skip "hidden" files + if (Ent->d_name[0] == '.') + continue; + + // Make sure it is a file and not something else + string const File = flCombine(Dir,Ent->d_name); +#ifdef _DIRENT_HAVE_D_TYPE + if (Ent->d_type != DT_REG) +#endif + { + if (RealFileExists(File) == false) + { + if (Debug == true) + std::clog << "Bad file: " << Ent->d_name << " → it is not a real file" << std::endl; + continue; + } + } + + // Skip bad filenames ala run-parts + const char *C = Ent->d_name; + for (; *C != 0; ++C) + if (isalpha(*C) == 0 && isdigit(*C) == 0 + && *C != '_' && *C != '-' && *C != '.') + break; + + // we don't reach the end of the name -> bad character included + if (*C != 0) + { + if (Debug == true) + std::clog << "Bad file: " << Ent->d_name << " → bad character »" << *C << "« in filename" << std::endl; + continue; + } + + // skip filenames which end with a period. These are never valid + if (*(C - 1) == '.') + { + if (Debug == true) + std::clog << "Bad file: " << Ent->d_name << " → Period as last character" << std::endl; + continue; + } + + if (Debug == true) + std::clog << "Accept file: " << Ent->d_name << " in " << Dir << std::endl; + List.push_back(File); + } + closedir(D); + if (SortList == true) std::sort(List.begin(),List.end()); return List; @@ -536,9 +656,9 @@ string flNoLink(string File) while (1) { // Read the link - int Res; + ssize_t Res; if ((Res = readlink(NFile.c_str(),Buffer,sizeof(Buffer))) <= 0 || - (unsigned)Res >= sizeof(Buffer)) + (size_t)Res >= sizeof(Buffer)) return File; // Append or replace the previous path @@ -646,6 +766,26 @@ bool WaitFd(int Fd,bool write,unsigned long timeout) child, it fixes up the important signals and nukes all of the fds, otherwise acts like normal fork. */ pid_t ExecFork() +{ + set KeepFDs; + + // FIXME: remove looking at APT::Keep-Fds eventually, its a hack + Configuration::Item const *Opts = _config->Tree("APT::Keep-Fds"); + if (Opts != 0 && Opts->Child != 0) + { + Opts = Opts->Child; + for (; Opts != 0; Opts = Opts->Next) + { + if (Opts->Value.empty() == true) + continue; + int fd = atoi(Opts->Value.c_str()); + KeepFDs.insert(fd); + } + } + return ExecFork(KeepFDs); +} + +pid_t ExecFork(std::set KeepFDs) { // Fork off the process pid_t Process = fork(); @@ -666,22 +806,8 @@ pid_t ExecFork() signal(SIGCONT,SIG_DFL); signal(SIGTSTP,SIG_DFL); - set KeepFDs; - Configuration::Item const *Opts = _config->Tree("APT::Keep-Fds"); - if (Opts != 0 && Opts->Child != 0) - { - Opts = Opts->Child; - for (; Opts != 0; Opts = Opts->Next) - { - if (Opts->Value.empty() == true) - continue; - int fd = atoi(Opts->Value.c_str()); - KeepFDs.insert(fd); - } - } - // Close all of our FDs - just in case - for (int K = 3; K != 40; K++) + for (int K = 3; K != sysconf(_SC_OPEN_MAX); K++) { if(KeepFDs.find(K) == KeepFDs.end()) fcntl(K,F_SETFD,FD_CLOEXEC); @@ -738,278 +864,94 @@ bool ExecWait(pid_t Pid,const char *Name,bool Reap) } /*}}}*/ -// ExecCompressor - Open a de/compressor pipe /*{{{*/ -// --------------------------------------------------------------------- -/* This opens the compressor, either in compress mode or decompress - mode. FileFd is always the compressor input/output file, - OutFd is the created pipe, Input for Compress, Output for Decompress. */ -bool ExecCompressor(APT::Configuration::Compressor const &Prog, - pid_t *Pid, int const FileFd, int &OutFd, bool const Comp) -{ - if (Pid != NULL) - *Pid = -1; - - // No compression - if (Prog.Binary.empty() == true) - { - OutFd = dup(FileFd); - return true; - } - - // Handle 'decompression' of empty files - if (Comp == false) - { - struct stat Buf; - fstat(FileFd, &Buf); - if (Buf.st_size == 0 && S_ISFIFO(Buf.st_mode) == false) - { - OutFd = FileFd; - return true; - } - } - - // Create a data pipe - int Pipe[2] = {-1,-1}; - if (pipe(Pipe) != 0) - return _error->Errno("pipe",_("Failed to create subprocess IPC")); - for (int J = 0; J != 2; J++) - SetCloseExec(Pipe[J],true); - - if (Comp == true) - OutFd = Pipe[1]; - else - OutFd = Pipe[0]; - - // The child.. - pid_t child = ExecFork(); - if (Pid != NULL) - *Pid = child; - if (child == 0) - { - if (Comp == true) - { - dup2(FileFd,STDOUT_FILENO); - dup2(Pipe[0],STDIN_FILENO); - } - else - { - dup2(FileFd,STDIN_FILENO); - dup2(Pipe[1],STDOUT_FILENO); - } - - SetCloseExec(STDOUT_FILENO,false); - SetCloseExec(STDIN_FILENO,false); - - std::vector Args; - Args.push_back(Prog.Binary.c_str()); - std::vector const * const addArgs = - (Comp == true) ? &(Prog.CompressArgs) : &(Prog.UncompressArgs); - for (std::vector::const_iterator a = addArgs->begin(); - a != addArgs->end(); ++a) - Args.push_back(a->c_str()); - Args.push_back(NULL); - - execvp(Args[0],(char **)&Args[0]); - cerr << _("Failed to exec compressor ") << Args[0] << endl; - _exit(100); - } - if (Comp == true) - close(Pipe[0]); - else - close(Pipe[1]); - - if (Pid == NULL) - ExecWait(child, Prog.Binary.c_str(), true); - - return true; -} -bool ExecCompressor(APT::Configuration::Compressor const &Prog, - pid_t *Pid, std::string const &FileName, int &OutFd, bool const Comp) -{ - if (Pid != NULL) - *Pid = -1; - - // No compression - if (Prog.Binary.empty() == true) - { - if (Comp == true) - OutFd = open(FileName.c_str(), O_WRONLY, 0666); - else - OutFd = open(FileName.c_str(), O_RDONLY); - return true; - } - - // Handle 'decompression' of empty files - if (Comp == false) - { - struct stat Buf; - stat(FileName.c_str(), &Buf); - if (Buf.st_size == 0) - { - OutFd = open(FileName.c_str(), O_RDONLY); - return true; - } - } - - // Create a data pipe - int Pipe[2] = {-1,-1}; - if (pipe(Pipe) != 0) - return _error->Errno("pipe",_("Failed to create subprocess IPC")); - for (int J = 0; J != 2; J++) - SetCloseExec(Pipe[J],true); - - if (Comp == true) - OutFd = Pipe[1]; - else - OutFd = Pipe[0]; - - // The child.. - pid_t child = ExecFork(); - if (Pid != NULL) - *Pid = child; - if (child == 0) - { - if (Comp == true) - { - dup2(Pipe[0],STDIN_FILENO); - SetCloseExec(STDIN_FILENO,false); - } - else - { - dup2(Pipe[1],STDOUT_FILENO); - SetCloseExec(STDOUT_FILENO,false); - } - - std::vector Args; - Args.push_back(Prog.Binary.c_str()); - std::vector const * const addArgs = - (Comp == true) ? &(Prog.CompressArgs) : &(Prog.UncompressArgs); - for (std::vector::const_iterator a = addArgs->begin(); - a != addArgs->end(); ++a) - Args.push_back(a->c_str()); - Args.push_back("--stdout"); - Args.push_back(FileName.c_str()); - Args.push_back(NULL); - - execvp(Args[0],(char **)&Args[0]); - cerr << _("Failed to exec compressor ") << Args[0] << endl; - _exit(100); - } - if (Comp == true) - close(Pipe[0]); - else - close(Pipe[1]); - - if (Pid == NULL) - ExecWait(child, Prog.Binary.c_str(), false); - - return true; -} - /*}}}*/ - // FileFd::Open - Open a file /*{{{*/ // --------------------------------------------------------------------- /* The most commonly used open mode combinations are given with Mode */ -bool FileFd::Open(string FileName,OpenMode Mode,CompressMode Compress, unsigned long const Perms) +bool FileFd::Open(string FileName,unsigned int const Mode,CompressMode Compress, unsigned long const Perms) { if (Mode == ReadOnlyGzip) return Open(FileName, ReadOnly, Gzip, Perms); - Close(); - d = new FileFdPrivate; - d->openmode = Mode; - Flags = AutoClose; if (Compress == Auto && (Mode & WriteOnly) == WriteOnly) - return _error->Error("Autodetection on %s only works in ReadOnly openmode!", FileName.c_str()); - if ((Mode & WriteOnly) != WriteOnly && (Mode & (Atomic | Create | Empty | Exclusive)) != 0) - return _error->Error("ReadOnly mode for %s doesn't accept additional flags!", FileName.c_str()); - - int fileflags = 0; -#define if_FLAGGED_SET(FLAG, MODE) if ((Mode & FLAG) == FLAG) fileflags |= MODE - if_FLAGGED_SET(ReadWrite, O_RDWR); - else if_FLAGGED_SET(ReadOnly, O_RDONLY); - else if_FLAGGED_SET(WriteOnly, O_WRONLY); - else return _error->Error("No openmode provided in FileFd::Open for %s", FileName.c_str()); - - if_FLAGGED_SET(Create, O_CREAT); - if_FLAGGED_SET(Exclusive, O_EXCL); - else if_FLAGGED_SET(Atomic, O_EXCL); - if_FLAGGED_SET(Empty, O_TRUNC); -#undef if_FLAGGED_SET + return FileFdError("Autodetection on %s only works in ReadOnly openmode!", FileName.c_str()); - // FIXME: Denote inbuilt compressors somehow - as we don't need to have the binaries for them std::vector const compressors = APT::Configuration::getCompressors(); std::vector::const_iterator compressor = compressors.begin(); if (Compress == Auto) { - Compress = None; for (; compressor != compressors.end(); ++compressor) { std::string file = std::string(FileName).append(compressor->Extension); if (FileExists(file) == false) continue; FileName = file; - if (compressor->Binary == ".") - Compress = None; - else - Compress = Extension; break; } } else if (Compress == Extension) { - Compress = None; - std::string ext = flExtension(FileName); - if (ext != FileName) + std::string::size_type const found = FileName.find_last_of('.'); + std::string ext; + if (found != std::string::npos) { - ext = "." + ext; - for (; compressor != compressors.end(); ++compressor) - if (ext == compressor->Extension) - break; + ext = FileName.substr(found); + if (ext == ".new" || ext == ".bak") + { + std::string::size_type const found2 = FileName.find_last_of('.', found - 1); + if (found2 != std::string::npos) + ext = FileName.substr(found2, found - found2); + else + ext.clear(); + } } + for (; compressor != compressors.end(); ++compressor) + if (ext == compressor->Extension) + break; + // no matching extension - assume uncompressed (imagine files like 'example.org_Packages') + if (compressor == compressors.end()) + for (compressor = compressors.begin(); compressor != compressors.end(); ++compressor) + if (compressor->Name == ".") + break; } - else if (Compress != None) + else { std::string name; switch (Compress) { + case None: name = "."; break; case Gzip: name = "gzip"; break; case Bzip2: name = "bzip2"; break; case Lzma: name = "lzma"; break; case Xz: name = "xz"; break; - default: return _error->Error("Can't find a match for specified compressor mode for file %s", FileName.c_str()); + case Auto: + case Extension: + // Unreachable + return FileFdError("Opening File %s in None, Auto or Extension should be already handled?!?", FileName.c_str()); } for (; compressor != compressors.end(); ++compressor) if (compressor->Name == name) break; - if (compressor == compressors.end() && name != "gzip") - return _error->Error("Can't find a configured compressor %s for file %s", name.c_str(), FileName.c_str()); + if (compressor == compressors.end()) + return FileFdError("Can't find a configured compressor %s for file %s", name.c_str(), FileName.c_str()); } - // if we have them, use inbuilt compressors instead of forking - if (compressor != compressors.end()) - { -#ifdef APT_USE_ZLIB - if (compressor->Name == "gzip") - { - Compress = Gzip; - compressor = compressors.end(); - } - else -#endif - if (compressor->Name == ".") - { - Compress = None; - compressor = compressors.end(); - } - } + if (compressor == compressors.end()) + return FileFdError("Can't find a match for specified compressor mode for file %s", FileName.c_str()); + return Open(FileName, Mode, *compressor, Perms); +} +bool FileFd::Open(string FileName,unsigned int const Mode,APT::Configuration::Compressor const &compressor, unsigned long const Perms) +{ + Close(); + Flags = AutoClose; + + if ((Mode & WriteOnly) != WriteOnly && (Mode & (Atomic | Create | Empty | Exclusive)) != 0) + return FileFdError("ReadOnly mode for %s doesn't accept additional flags!", FileName.c_str()); + if ((Mode & ReadWrite) == 0) + return FileFdError("No openmode provided in FileFd::Open for %s", FileName.c_str()); if ((Mode & Atomic) == Atomic) { Flags |= Replace; - char *name = strdup((FileName + ".XXXXXX").c_str()); - TemporaryFileName = string(mktemp(name)); - free(name); } else if ((Mode & (Exclusive | Create)) == (Exclusive | Create)) { @@ -1023,37 +965,47 @@ bool FileFd::Open(string FileName,OpenMode Mode,CompressMode Compress, unsigned unlink(FileName.c_str()); } - if (compressor != compressors.end()) + int fileflags = 0; + #define if_FLAGGED_SET(FLAG, MODE) if ((Mode & FLAG) == FLAG) fileflags |= MODE + if_FLAGGED_SET(ReadWrite, O_RDWR); + else if_FLAGGED_SET(ReadOnly, O_RDONLY); + else if_FLAGGED_SET(WriteOnly, O_WRONLY); + + if_FLAGGED_SET(Create, O_CREAT); + if_FLAGGED_SET(Empty, O_TRUNC); + if_FLAGGED_SET(Exclusive, O_EXCL); + #undef if_FLAGGED_SET + + if ((Mode & Atomic) == Atomic) { - if ((Mode & ReadWrite) == ReadWrite) - return _error->Error("External compressors like %s do not support readwrite mode for file %s", compressor->Name.c_str(), FileName.c_str()); + char *name = strdup((FileName + ".XXXXXX").c_str()); - if (ExecCompressor(*compressor, NULL /*d->compressor_pid*/, FileName, iFd, ((Mode & ReadOnly) != ReadOnly)) == false) - return _error->Error("Forking external compressor %s is not implemented for %s", compressor->Name.c_str(), FileName.c_str()); - d->pipe = true; - d->compressor = *compressor; + if((iFd = mkstemp(name)) == -1) + { + free(name); + return FileFdErrno("mkstemp", "Could not create temporary file for %s", FileName.c_str()); + } + + TemporaryFileName = string(name); + free(name); + + if(Perms != 600 && fchmod(iFd, Perms) == -1) + return FileFdErrno("fchmod", "Could not change permissions for temporary file %s", TemporaryFileName.c_str()); } else - { - if (TemporaryFileName.empty() == false) - iFd = open(TemporaryFileName.c_str(), fileflags, Perms); - else - iFd = open(FileName.c_str(), fileflags, Perms); + iFd = open(FileName.c_str(), fileflags, Perms); + this->FileName = FileName; + if (iFd == -1 || OpenInternDescriptor(Mode, compressor) == false) + { if (iFd != -1) { - if (OpenInternDescriptor(Mode, Compress) == false) - { - close (iFd); - iFd = -1; - } + close (iFd); + iFd = -1; } + return FileFdErrno("open",_("Could not open file %s"), FileName.c_str()); } - if (iFd == -1) - return _error->Errno("open",_("Could not open file %s"),FileName.c_str()); - - this->FileName = FileName; SetCloseExec(iFd,true); return true; } @@ -1061,62 +1013,221 @@ bool FileFd::Open(string FileName,OpenMode Mode,CompressMode Compress, unsigned // FileFd::OpenDescriptor - Open a filedescriptor /*{{{*/ // --------------------------------------------------------------------- /* */ -bool FileFd::OpenDescriptor(int Fd, OpenMode Mode, CompressMode Compress, bool AutoClose) +bool FileFd::OpenDescriptor(int Fd, unsigned int const Mode, CompressMode Compress, bool AutoClose) +{ + std::vector const compressors = APT::Configuration::getCompressors(); + std::vector::const_iterator compressor = compressors.begin(); + std::string name; + + // compat with the old API + if (Mode == ReadOnlyGzip && Compress == None) + Compress = Gzip; + + switch (Compress) + { + case None: name = "."; break; + case Gzip: name = "gzip"; break; + case Bzip2: name = "bzip2"; break; + case Lzma: name = "lzma"; break; + case Xz: name = "xz"; break; + case Auto: + case Extension: + if (AutoClose == true && Fd != -1) + close(Fd); + return FileFdError("Opening Fd %d in Auto or Extension compression mode is not supported", Fd); + } + for (; compressor != compressors.end(); ++compressor) + if (compressor->Name == name) + break; + if (compressor == compressors.end()) + { + if (AutoClose == true && Fd != -1) + close(Fd); + return FileFdError("Can't find a configured compressor %s for file %s", name.c_str(), FileName.c_str()); + } + return OpenDescriptor(Fd, Mode, *compressor, AutoClose); +} +bool FileFd::OpenDescriptor(int Fd, unsigned int const Mode, APT::Configuration::Compressor const &compressor, bool AutoClose) { Close(); - d = new FileFdPrivate; - d->openmode = Mode; Flags = (AutoClose) ? FileFd::AutoClose : 0; - iFd = Fd; - if (OpenInternDescriptor(Mode, Compress) == false) + if (AutoClose == false && ( +#ifdef HAVE_ZLIB + compressor.Name == "gzip" || +#endif +#ifdef HAVE_BZ2 + compressor.Name == "bzip2" || +#endif + false)) { - if (AutoClose) - close (iFd); - return _error->Errno("gzdopen",_("Could not open file descriptor %d"), Fd); + // Need to duplicate fd here or gzclose for cleanup will close the fd as well + iFd = dup(Fd); } + else + iFd = Fd; this->FileName = ""; + if (Fd == -1 || OpenInternDescriptor(Mode, compressor) == false) + { + if (iFd != -1 && ( +#ifdef HAVE_ZLIB + compressor.Name == "gzip" || +#endif +#ifdef HAVE_BZ2 + compressor.Name == "bzip2" || +#endif + AutoClose == true)) + { + close (iFd); + iFd = -1; + } + return FileFdError(_("Could not open file descriptor %d"), Fd); + } return true; } -bool FileFd::OpenInternDescriptor(OpenMode Mode, CompressMode Compress) +bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::Compressor const &compressor) { - if (Compress == None) + if (compressor.Name == "." || compressor.Binary.empty() == true) return true; -#ifdef APT_USE_ZLIB - else if (Compress == Gzip) + + if (d == NULL) { + d = new FileFdPrivate(); + d->openmode = Mode; + d->compressor = compressor; + } + +#ifdef HAVE_ZLIB + if (compressor.Name == "gzip") + { + if (d->gz != NULL) + { + gzclose(d->gz); + d->gz = NULL; + } if ((Mode & ReadWrite) == ReadWrite) d->gz = gzdopen(iFd, "r+"); else if ((Mode & WriteOnly) == WriteOnly) d->gz = gzdopen(iFd, "w"); else - d->gz = gzdopen (iFd, "r"); + d->gz = gzdopen(iFd, "r"); if (d->gz == NULL) return false; Flags |= Compressed; + return true; + } +#endif +#ifdef HAVE_BZ2 + if (compressor.Name == "bzip2") + { + if (d->bz2 != NULL) + { + BZ2_bzclose(d->bz2); + d->bz2 = NULL; + } + if ((Mode & ReadWrite) == ReadWrite) + d->bz2 = BZ2_bzdopen(iFd, "r+"); + else if ((Mode & WriteOnly) == WriteOnly) + d->bz2 = BZ2_bzdopen(iFd, "w"); + else + d->bz2 = BZ2_bzdopen(iFd, "r"); + if (d->bz2 == NULL) + return false; + Flags |= Compressed; + return true; } #endif + + // collect zombies here in case we reopen + if (d->compressor_pid > 0) + ExecWait(d->compressor_pid, "FileFdCompressor", true); + + if ((Mode & ReadWrite) == ReadWrite) + return FileFdError("ReadWrite mode is not supported for file %s", FileName.c_str()); + + bool const Comp = (Mode & WriteOnly) == WriteOnly; + if (Comp == false) + { + // Handle 'decompression' of empty files + struct stat Buf; + fstat(iFd, &Buf); + if (Buf.st_size == 0 && S_ISFIFO(Buf.st_mode) == false) + return true; + + // We don't need the file open - instead let the compressor open it + // as he properly knows better how to efficiently read from 'his' file + if (FileName.empty() == false) + { + close(iFd); + iFd = -1; + } + } + + // Create a data pipe + int Pipe[2] = {-1,-1}; + if (pipe(Pipe) != 0) + return FileFdErrno("pipe",_("Failed to create subprocess IPC")); + for (int J = 0; J != 2; J++) + SetCloseExec(Pipe[J],true); + + d->compressed_fd = iFd; + d->pipe = true; + + if (Comp == true) + iFd = Pipe[1]; else + iFd = Pipe[0]; + + // The child.. + d->compressor_pid = ExecFork(); + if (d->compressor_pid == 0) { - std::string name; - switch (Compress) + if (Comp == true) { - case Gzip: name = "gzip"; break; - case Bzip2: name = "bzip2"; break; - case Lzma: name = "lzma"; break; - case Xz: name = "xz"; break; - default: return _error->Error("Can't find a match for specified compressor mode for file %s", FileName.c_str()); + dup2(d->compressed_fd,STDOUT_FILENO); + dup2(Pipe[0],STDIN_FILENO); } - std::vector const compressors = APT::Configuration::getCompressors(); - std::vector::const_iterator compressor = compressors.begin(); - for (; compressor != compressors.end(); ++compressor) - if (compressor->Name == name) - break; - if (compressor == compressors.end() || - ExecCompressor(*compressor, NULL /*&(d->compressor_pid)*/, - FileName, iFd, ((Mode & ReadOnly) != ReadOnly)) == false) - return _error->Error("Forking external compressor %s is not implemented for %s", name.c_str(), FileName.c_str()); - d->pipe = true; + else + { + if (FileName.empty() == true) + dup2(d->compressed_fd,STDIN_FILENO); + dup2(Pipe[1],STDOUT_FILENO); + } + int const nullfd = open("/dev/null", O_WRONLY); + if (nullfd != -1) + { + dup2(nullfd,STDERR_FILENO); + close(nullfd); + } + + SetCloseExec(STDOUT_FILENO,false); + SetCloseExec(STDIN_FILENO,false); + + std::vector Args; + Args.push_back(compressor.Binary.c_str()); + std::vector const * const addArgs = + (Comp == true) ? &(compressor.CompressArgs) : &(compressor.UncompressArgs); + for (std::vector::const_iterator a = addArgs->begin(); + a != addArgs->end(); ++a) + Args.push_back(a->c_str()); + if (Comp == false && FileName.empty() == false) + { + Args.push_back("--stdout"); + if (TemporaryFileName.empty() == false) + Args.push_back(TemporaryFileName.c_str()); + else + Args.push_back(FileName.c_str()); + } + Args.push_back(NULL); + + execvp(Args[0],(char **)&Args[0]); + cerr << _("Failed to exec compressor ") << Args[0] << endl; + _exit(100); } + if (Comp == true) + close(Pipe[0]); + else + close(Pipe[1]); + return true; } /*}}}*/ @@ -1127,6 +1238,10 @@ bool FileFd::OpenInternDescriptor(OpenMode Mode, CompressMode Compress) FileFd::~FileFd() { Close(); + if (d != NULL) + d->CloseDown(FileName); + delete d; + d = NULL; } /*}}}*/ // FileFd::Read - Read a bit of the file /*{{{*/ @@ -1135,29 +1250,54 @@ FileFd::~FileFd() gracefully. */ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual) { - int Res; + ssize_t Res; errno = 0; if (Actual != 0) *Actual = 0; *((char *)To) = '\0'; do { -#ifdef APT_USE_ZLIB - if (d->gz != NULL) - Res = gzread(d->gz,To,Size); +#ifdef HAVE_ZLIB + if (d != NULL && d->gz != NULL) + Res = gzread(d->gz,To,Size); + else +#endif +#ifdef HAVE_BZ2 + if (d != NULL && d->bz2 != NULL) + Res = BZ2_bzread(d->bz2,To,Size); else #endif Res = read(iFd,To,Size); - if (Res < 0 && errno == EINTR) - continue; + if (Res < 0) { - Flags |= Fail; - return _error->Errno("read",_("Read error")); + if (errno == EINTR) + continue; +#ifdef HAVE_ZLIB + if (d != NULL && d->gz != NULL) + { + int err; + char const * const errmsg = gzerror(d->gz, &err); + if (err != Z_ERRNO) + return FileFdError("gzread: %s (%d: %s)", _("Read error"), err, errmsg); + } +#endif +#ifdef HAVE_BZ2 + if (d != NULL && d->bz2 != NULL) + { + int err; + char const * const errmsg = BZ2_bzerror(d->bz2, &err); + if (err != BZ_IO_ERROR) + return FileFdError("BZ2_bzread: %s (%d: %s)", _("Read error"), err, errmsg); + } +#endif + return FileFdErrno("read",_("Read error")); } To = (char *)To + Res; Size -= Res; + if (d != NULL) + d->seekpos += Res; if (Actual != 0) *Actual += Res; } @@ -1172,9 +1312,8 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual) Flags |= HitEof; return true; } - - Flags |= Fail; - return _error->Error(_("read, still have %llu to read but none left"), Size); + + return FileFdError(_("read, still have %llu to read but none left"), Size); } /*}}}*/ // FileFd::ReadLine - Read a complete line from the file /*{{{*/ @@ -1184,21 +1323,25 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual) char* FileFd::ReadLine(char *To, unsigned long long const Size) { *To = '\0'; -#ifdef APT_USE_ZLIB - if (d->gz != NULL) +#ifdef HAVE_ZLIB + if (d != NULL && d->gz != NULL) return gzgets(d->gz, To, Size); #endif unsigned long long read = 0; - if (Read(To, Size, &read) == false) + while ((Size - 1) != read) + { + unsigned long long done = 0; + if (Read(To + read, 1, &done) == false) + return NULL; + if (done == 0) + break; + if (To[read++] == '\n') + break; + } + if (read == 0) return NULL; - char* c = To; - for (; *c != '\n' && *c != '\0' && read != 0; --read, ++c) - ; // find the end of the line - if (*c != '\0') - *c = '\0'; - if (read != 0) - Seek(Tell() - read); + To[read] = '\0'; return To; } /*}}}*/ @@ -1207,33 +1350,78 @@ char* FileFd::ReadLine(char *To, unsigned long long const Size) /* */ bool FileFd::Write(const void *From,unsigned long long Size) { - int Res; + ssize_t Res; errno = 0; do { -#ifdef APT_USE_ZLIB - if (d->gz != NULL) +#ifdef HAVE_ZLIB + if (d != NULL && d->gz != NULL) Res = gzwrite(d->gz,From,Size); else +#endif +#ifdef HAVE_BZ2 + if (d != NULL && d->bz2 != NULL) + Res = BZ2_bzwrite(d->bz2,(void*)From,Size); + else #endif Res = write(iFd,From,Size); if (Res < 0 && errno == EINTR) continue; if (Res < 0) { - Flags |= Fail; - return _error->Errno("write",_("Write error")); +#ifdef HAVE_ZLIB + if (d != NULL && d->gz != NULL) + { + int err; + char const * const errmsg = gzerror(d->gz, &err); + if (err != Z_ERRNO) + return FileFdError("gzwrite: %s (%d: %s)", _("Write error"), err, errmsg); + } +#endif +#ifdef HAVE_BZ2 + if (d != NULL && d->bz2 != NULL) + { + int err; + char const * const errmsg = BZ2_bzerror(d->bz2, &err); + if (err != BZ_IO_ERROR) + return FileFdError("BZ2_bzwrite: %s (%d: %s)", _("Write error"), err, errmsg); + } +#endif + return FileFdErrno("write",_("Write error")); } From = (char *)From + Res; Size -= Res; + if (d != NULL) + d->seekpos += Res; } while (Res > 0 && Size > 0); if (Size == 0) return true; - - Flags |= Fail; + + return FileFdError(_("write, still have %llu to write but couldn't"), Size); +} +bool FileFd::Write(int Fd, const void *From, unsigned long long Size) +{ + ssize_t Res; + errno = 0; + do + { + Res = write(Fd,From,Size); + if (Res < 0 && errno == EINTR) + continue; + if (Res < 0) + return _error->Errno("write",_("Write error")); + + From = (char *)From + Res; + Size -= Res; + } + while (Res > 0 && Size > 0); + + if (Size == 0) + return true; + return _error->Error(_("write, still have %llu to write but couldn't"), Size); } /*}}}*/ @@ -1242,28 +1430,65 @@ bool FileFd::Write(const void *From,unsigned long long Size) /* */ bool FileFd::Seek(unsigned long long To) { - if (d->pipe == true) + if (d != NULL && (d->pipe == true +#ifdef HAVE_BZ2 + || d->bz2 != NULL +#endif + )) { - // FIXME: What about OpenDescriptor() stuff here? - close(iFd); - bool result = ExecCompressor(d->compressor, NULL, FileName, iFd, (d->openmode & ReadOnly) != ReadOnly); - if (result == true && To != 0) - result &= Skip(To); - return result; + // Our poor man seeking in pipes is costly, so try to avoid it + unsigned long long seekpos = Tell(); + if (seekpos == To) + return true; + else if (seekpos < To) + return Skip(To - seekpos); + + if ((d->openmode & ReadOnly) != ReadOnly) + return FileFdError("Reopen is only implemented for read-only files!"); +#ifdef HAVE_BZ2 + if (d->bz2 != NULL) + { + BZ2_bzclose(d->bz2); + d->bz2 = NULL; + } +#endif + if (iFd != -1) + close(iFd); + iFd = -1; + if (TemporaryFileName.empty() == false) + iFd = open(TemporaryFileName.c_str(), O_RDONLY); + else if (FileName.empty() == false) + iFd = open(FileName.c_str(), O_RDONLY); + else + { + if (d->compressed_fd > 0) + if (lseek(d->compressed_fd, 0, SEEK_SET) != 0) + iFd = d->compressed_fd; + if (iFd < 0) + return FileFdError("Reopen is not implemented for pipes opened with FileFd::OpenDescriptor()!"); + } + + if (OpenInternDescriptor(d->openmode, d->compressor) == false) + return FileFdError("Seek on file %s because it couldn't be reopened", FileName.c_str()); + + if (To != 0) + return Skip(To); + + d->seekpos = To; + return true; } - int res; -#ifdef APT_USE_ZLIB - if (d->gz) + off_t res; +#ifdef HAVE_ZLIB + if (d != NULL && d->gz) res = gzseek(d->gz,To,SEEK_SET); else #endif res = lseek(iFd,To,SEEK_SET); - if (res != (signed)To) - { - Flags |= Fail; - return _error->Error("Unable to seek to %llu", To); - } - + if (res != (off_t)To) + return FileFdError("Unable to seek to %llu", To); + + if (d != NULL) + d->seekpos = To; return true; } /*}}}*/ @@ -1272,19 +1497,36 @@ bool FileFd::Seek(unsigned long long To) /* */ bool FileFd::Skip(unsigned long long Over) { - int res; -#ifdef APT_USE_ZLIB - if (d->gz != NULL) + if (d != NULL && (d->pipe == true +#ifdef HAVE_BZ2 + || d->bz2 != NULL +#endif + )) + { + d->seekpos += Over; + char buffer[1024]; + while (Over != 0) + { + unsigned long long toread = std::min((unsigned long long) sizeof(buffer), Over); + if (Read(buffer, toread) == false) + return FileFdError("Unable to seek ahead %llu",Over); + Over -= toread; + } + return true; + } + + off_t res; +#ifdef HAVE_ZLIB + if (d != NULL && d->gz != NULL) res = gzseek(d->gz,Over,SEEK_CUR); else #endif res = lseek(iFd,Over,SEEK_CUR); if (res < 0) - { - Flags |= Fail; - return _error->Error("Unable to seek ahead %llu",Over); - } - + return FileFdError("Unable to seek ahead %llu",Over); + if (d != NULL) + d->seekpos = res; + return true; } /*}}}*/ @@ -1293,17 +1535,13 @@ bool FileFd::Skip(unsigned long long Over) /* */ bool FileFd::Truncate(unsigned long long To) { - if (d->gz != NULL) - { - Flags |= Fail; - return _error->Error("Truncating gzipped files is not implemented (%s)", FileName.c_str()); - } +#if defined HAVE_ZLIB || defined HAVE_BZ2 + if (d != NULL && (d->gz != NULL || d->bz2 != NULL)) + return FileFdError("Truncating compressed files is not implemented (%s)", FileName.c_str()); +#endif if (ftruncate(iFd,To) != 0) - { - Flags |= Fail; - return _error->Error("Unable to truncate to %llu",To); - } - + return FileFdError("Unable to truncate to %llu",To); + return true; } /*}}}*/ @@ -1312,15 +1550,28 @@ bool FileFd::Truncate(unsigned long long To) /* */ unsigned long long FileFd::Tell() { + // In theory, we could just return seekpos here always instead of + // seeking around, but not all users of FileFd use always Seek() and co + // so d->seekpos isn't always true and we can just use it as a hint if + // we have nothing else, but not always as an authority… + if (d != NULL && (d->pipe == true +#ifdef HAVE_BZ2 + || d->bz2 != NULL +#endif + )) + return d->seekpos; + off_t Res; -#ifdef APT_USE_ZLIB - if (d->gz != NULL) +#ifdef HAVE_ZLIB + if (d != NULL && d->gz != NULL) Res = gztell(d->gz); else #endif Res = lseek(iFd,0,SEEK_CUR); if (Res == (off_t)-1) - _error->Errno("lseek","Failed to determine the current file position"); + FileFdErrno("lseek","Failed to determine the current file position"); + if (d != NULL) + d->seekpos = Res; return Res; } /*}}}*/ @@ -1330,17 +1581,18 @@ unsigned long long FileFd::Tell() unsigned long long FileFd::FileSize() { struct stat Buf; - if (d->pipe == false && fstat(iFd,&Buf) != 0) - return _error->Errno("fstat","Unable to determine the file size"); + if ((d == NULL || d->pipe == false) && fstat(iFd,&Buf) != 0) + return FileFdErrno("fstat","Unable to determine the file size"); // for compressor pipes st_size is undefined and at 'best' zero - if (d->pipe == true || S_ISFIFO(Buf.st_mode)) + if ((d != NULL && d->pipe == true) || S_ISFIFO(Buf.st_mode)) { // we set it here, too, as we get the info here for free // in theory the Open-methods should take care of it already - d->pipe = true; + if (d != NULL) + d->pipe = true; if (stat(FileName.c_str(), &Buf) != 0) - return _error->Errno("stat","Unable to determine the file size"); + return FileFdErrno("stat","Unable to determine the file size"); } return Buf.st_size; @@ -1355,34 +1607,47 @@ unsigned long long FileFd::Size() // for compressor pipes st_size is undefined and at 'best' zero, // so we 'read' the content and 'seek' back - see there - if (d->pipe == true) + if (d != NULL && (d->pipe == true +#ifdef HAVE_BZ2 + || (d->bz2 && size > 0) +#endif + )) { - // FIXME: If we have read first and then FileSize() the report is wrong - size = 0; + unsigned long long const oldSeek = Tell(); char ignore[1000]; unsigned long long read = 0; do { - Read(ignore, sizeof(ignore), &read); - size += read; + if (Read(ignore, sizeof(ignore), &read) == false) + { + Seek(oldSeek); + return 0; + } } while(read != 0); - Seek(0); + size = Tell(); + Seek(oldSeek); } -#ifdef APT_USE_ZLIB +#ifdef HAVE_ZLIB // only check gzsize if we are actually a gzip file, just checking for // "gz" is not sufficient as uncompressed files could be opened with // gzopen in "direct" mode as well - else if (d->gz && !gzdirect(d->gz) && size > 0) + else if (d != NULL && d->gz && !gzdirect(d->gz) && size > 0) { + off_t const oldPos = lseek(iFd,0,SEEK_CUR); /* unfortunately zlib.h doesn't provide a gzsize(), so we have to do * this ourselves; the original (uncompressed) file size is the last 32 * bits of the file */ // FIXME: Size for gz-files is limited by 32bit… no largefile support - off_t orig_pos = lseek(iFd, 0, SEEK_CUR); if (lseek(iFd, -4, SEEK_END) < 0) - return _error->Errno("lseek","Unable to seek to end of gzipped file"); - size = 0L; + { + FileFdErrno("lseek","Unable to seek to end of gzipped file"); + return 0; + } + size = 0; if (read(iFd, &size, 4) != 4) - return _error->Errno("read","Unable to read original size of gzipped file"); + { + FileFdErrno("read","Unable to read original size of gzipped file"); + return 0; + } #ifdef WORDS_BIGENDIAN uint32_t tmp_size = size; @@ -1391,8 +1656,12 @@ unsigned long long FileFd::Size() size = tmp_size; #endif - if (lseek(iFd, orig_pos, SEEK_SET) < 0) - return _error->Errno("lseek","Unable to seek in gzipped file"); + if (lseek(iFd, oldPos, SEEK_SET) < 0) + { + FileFdErrno("lseek","Unable to seek in gzipped file"); + return 0; + } + return size; } #endif @@ -1406,21 +1675,22 @@ unsigned long long FileFd::Size() time_t FileFd::ModificationTime() { struct stat Buf; - if (d->pipe == false && fstat(iFd,&Buf) != 0) + if ((d == NULL || d->pipe == false) && fstat(iFd,&Buf) != 0) { - _error->Errno("fstat","Unable to determine the modification time of file %s", FileName.c_str()); + FileFdErrno("fstat","Unable to determine the modification time of file %s", FileName.c_str()); return 0; } // for compressor pipes st_size is undefined and at 'best' zero - if (d->pipe == true || S_ISFIFO(Buf.st_mode)) + if ((d != NULL && d->pipe == true) || S_ISFIFO(Buf.st_mode)) { // we set it here, too, as we get the info here for free // in theory the Open-methods should take care of it already - d->pipe = true; + if (d != NULL) + d->pipe = true; if (stat(FileName.c_str(), &Buf) != 0) { - _error->Errno("fstat","Unable to determine the modification time of file %s", FileName.c_str()); + FileFdErrno("fstat","Unable to determine the modification time of file %s", FileName.c_str()); return 0; } } @@ -1439,19 +1709,18 @@ bool FileFd::Close() bool Res = true; if ((Flags & AutoClose) == AutoClose) { -#ifdef APT_USE_ZLIB - if (d != NULL && d->gz != NULL) { - int const e = gzclose(d->gz); - // gzdopen() on empty files always fails with "buffer error" here, ignore that - if (e != 0 && e != Z_BUF_ERROR) - Res &= _error->Errno("close",_("Problem closing the gzip file %s"), FileName.c_str()); - } else -#endif - if (iFd > 0 && close(iFd) != 0) - Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str()); + if ((Flags & Compressed) != Compressed && iFd > 0 && close(iFd) != 0) + Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str()); + + if (d != NULL) + { + Res &= d->CloseDown(FileName); + delete d; + d = NULL; + } } - if ((Flags & Replace) == Replace && iFd >= 0) { + if ((Flags & Replace) == Replace) { if (rename(TemporaryFileName.c_str(), FileName.c_str()) != 0) Res &= _error->Errno("rename",_("Problem renaming the file %s to %s"), TemporaryFileName.c_str(), FileName.c_str()); @@ -1466,14 +1735,8 @@ bool FileFd::Close() if (unlink(FileName.c_str()) != 0) Res &= _error->WarningE("unlnk",_("Problem unlinking the file %s"), FileName.c_str()); - if (d != NULL) - { -// if (d->compressor_pid != -1) -// ExecWait(d->compressor_pid, "FileFdCompressor", true); - delete d; - d = NULL; - } - + if (Res == false) + Flags |= Fail; return Res; } /*}}}*/ @@ -1482,12 +1745,72 @@ bool FileFd::Close() /* */ bool FileFd::Sync() { -#ifdef _POSIX_SYNCHRONIZED_IO if (fsync(iFd) != 0) - return _error->Errno("sync",_("Problem syncing the file")); -#endif + return FileFdErrno("sync",_("Problem syncing the file")); return true; } /*}}}*/ +// FileFd::FileFdErrno - set Fail and call _error->Errno *{{{*/ +bool FileFd::FileFdErrno(const char *Function, const char *Description,...) +{ + Flags |= Fail; + va_list args; + size_t msgSize = 400; + int const errsv = errno; + while (true) + { + va_start(args,Description); + if (_error->InsertErrno(GlobalError::ERROR, Function, Description, args, errsv, msgSize) == false) + break; + va_end(args); + } + return false; +} + /*}}}*/ +// FileFd::FileFdError - set Fail and call _error->Error *{{{*/ +bool FileFd::FileFdError(const char *Description,...) { + Flags |= Fail; + va_list args; + size_t msgSize = 400; + while (true) + { + va_start(args,Description); + if (_error->Insert(GlobalError::ERROR, Description, args, msgSize) == false) + break; + va_end(args); + } + return false; +} + /*}}}*/ gzFile FileFd::gzFd() { return (gzFile) d->gz; } + + +// Glob - wrapper around "glob()" /*{{{*/ +// --------------------------------------------------------------------- +/* */ +std::vector Glob(std::string const &pattern, int flags) +{ + std::vector result; + glob_t globbuf; + int glob_res; + unsigned int i; + + glob_res = glob(pattern.c_str(), flags, NULL, &globbuf); + + if (glob_res != 0) + { + if(glob_res != GLOB_NOMATCH) { + _error->Errno("glob", "Problem with glob"); + return result; + } + } + + // append results + for(i=0;i