X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/13394a16f5f5a5fc199a5633ac39c14c7709a7c4..f0e835998f21c315c5154da4e7f5c51b18929b3a:/apt-pkg/contrib/fileutl.cc?ds=inline diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc index a7de09c44..7a24b6bb0 100644 --- a/apt-pkg/contrib/fileutl.cc +++ b/apt-pkg/contrib/fileutl.cc @@ -11,21 +11,25 @@ Most of this source is placed in the Public Domain, do with it what you will It was originally written by Jason Gunthorpe . + FileFd gzip support added by Martin Pitt The exception is RunScripts() it is under the GPLv2 ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ +#include + #include +#include #include #include +#include #include -#include - #include #include +#include #include #include @@ -34,13 +38,51 @@ #include #include #include +#include #include #include #include +#include + +#ifdef HAVE_ZLIB + #include +#endif +#ifdef HAVE_BZ2 + #include +#endif + +#ifdef WORDS_BIGENDIAN +#include +#endif + +#include /*}}}*/ using namespace std; +class FileFdPrivate { + public: +#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; + unsigned int openmode; + unsigned long long seekpos; + FileFdPrivate() : gz(NULL), bz2(NULL), + compressed_fd(-1), compressor_pid(-1), pipe(false), + openmode(0), seekpos(0) {}; +}; + // RunScripts - Run a set of scripts from a configuration subtree /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -57,6 +99,15 @@ bool RunScripts(const char *Cnf) // This is the child if (Child == 0) { + if (_config->FindDir("DPkg::Chroot-Directory","/") != "/") + { + std::cerr << "Chrooting into " + << _config->FindDir("DPkg::Chroot-Directory") + << std::endl; + if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0) + _exit(100); + } + if (chdir("/tmp/") != 0) _exit(100); @@ -113,10 +164,10 @@ bool CopyFile(FileFd &From,FileFd &To) // Buffered copy between fds SPtrArray Buf = new unsigned char[64000]; - unsigned long Size = From.Size(); + unsigned long long Size = From.Size(); while (Size != 0) { - unsigned long ToRead = Size; + unsigned long long ToRead = Size; if (Size > 64000) ToRead = 64000; @@ -186,7 +237,7 @@ int GetLock(string File,bool Errors) /*}}}*/ // FileExists - Check if a file exists /*{{{*/ // --------------------------------------------------------------------- -/* */ +/* Beware: Directories are also files! */ bool FileExists(string File) { struct stat Buf; @@ -195,6 +246,303 @@ bool FileExists(string File) return true; } /*}}}*/ +// RealFileExists - Check if a file exists and if it is really a file /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool RealFileExists(string File) +{ + struct stat Buf; + if (stat(File.c_str(),&Buf) != 0) + return false; + return ((Buf.st_mode & S_IFREG) != 0); +} + /*}}}*/ +// DirectoryExists - Check if a directory exists and is really one /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool DirectoryExists(string const &Path) +{ + struct stat Buf; + if (stat(Path.c_str(),&Buf) != 0) + return false; + return ((Buf.st_mode & S_IFDIR) != 0); +} + /*}}}*/ +// CreateDirectory - poor man's mkdir -p guarded by a parent directory /*{{{*/ +// --------------------------------------------------------------------- +/* This method will create all directories needed for path in good old + mkdir -p style but refuses to do this if Parent is not a prefix of + this Path. Example: /var/cache/ and /var/cache/apt/archives are given, + so it will create apt/archives if /var/cache exists - on the other + hand if the parent is /var/lib the creation will fail as this path + is not a parent of the path to be generated. */ +bool CreateDirectory(string const &Parent, string const &Path) +{ + if (Parent.empty() == true || Path.empty() == true) + return false; + + if (DirectoryExists(Path) == true) + return true; + + if (DirectoryExists(Parent) == false) + return false; + + // we are not going to create directories "into the blue" + if (Path.find(Parent, 0) != 0) + return false; + + vector const dirs = VectorizeString(Path.substr(Parent.size()), '/'); + string progress = Parent; + for (vector::const_iterator d = dirs.begin(); d != dirs.end(); ++d) + { + if (d->empty() == true) + continue; + + progress.append("/").append(*d); + if (DirectoryExists(progress) == true) + continue; + + if (mkdir(progress.c_str(), 0755) != 0) + return false; + } + return true; +} + /*}}}*/ +// CreateAPTDirectoryIfNeeded - ensure that the given directory exists /*{{{*/ +// --------------------------------------------------------------------- +/* a small wrapper around CreateDirectory to check if it exists and to + remove the trailing "/apt/" from the parent directory if needed */ +bool CreateAPTDirectoryIfNeeded(string const &Parent, string const &Path) +{ + if (DirectoryExists(Path) == true) + return true; + + size_t const len = Parent.size(); + if (len > 5 && Parent.find("/apt/", len - 6, 5) == len - 5) + { + if (CreateDirectory(Parent.substr(0,len-5), Path) == true) + return true; + } + else if (CreateDirectory(Parent, Path) == true) + return true; + + return false; +} + /*}}}*/ +// GetListOfFilesInDir - returns a vector of files in the given dir /*{{{*/ +// --------------------------------------------------------------------- +/* If an extension is given only files with this extension are included + in the returned vector, otherwise every "normal" file is included. */ +std::vector GetListOfFilesInDir(string const &Dir, string const &Ext, + bool const &SortList, bool const &AllowNoExt) +{ + std::vector ext; + ext.reserve(2); + if (Ext.empty() == false) + ext.push_back(Ext); + if (AllowNoExt == true && ext.empty() == false) + ext.push_back(""); + return GetListOfFilesInDir(Dir, ext, SortList); +} +std::vector GetListOfFilesInDir(string const &Dir, std::vector const &Ext, + bool const &SortList) +{ + // Attention debuggers: need to be set with the environment config file! + bool const Debug = _config->FindB("Debug::GetListOfFilesInDir", false); + if (Debug == true) + { + std::clog << "Accept in " << Dir << " only files with the following " << Ext.size() << " extensions:" << std::endl; + if (Ext.empty() == true) + std::clog << "\tNO extension" << std::endl; + else + for (std::vector::const_iterator e = Ext.begin(); + e != Ext.end(); ++e) + std::clog << '\t' << (e->empty() == true ? "NO" : *e) << " extension" << std::endl; + } + + std::vector List; + + if (DirectoryExists(Dir.c_str()) == false) + { + _error->Error(_("List of files can't be created as '%s' is not a directory"), Dir.c_str()); + return List; + } + + Configuration::MatchAgainstConfig SilentIgnore("Dir::Ignore-Files-Silently"); + 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.c_str()) == false) + { + // do not show ignoration warnings for directories + if ( +#ifdef _DIRENT_HAVE_D_TYPE + Ent->d_type == DT_DIR || +#endif + DirectoryExists(File.c_str()) == 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; + } + } + + // check for accepted extension: + // no extension given -> periods are bad as hell! + // extensions given -> "" extension allows no extension + if (Ext.empty() == false) + { + string d_ext = flExtension(Ent->d_name); + if (d_ext == Ent->d_name) // no extension + { + if (std::find(Ext.begin(), Ext.end(), "") == Ext.end()) + { + if (Debug == true) + std::clog << "Bad file: " << Ent->d_name << " → no extension" << std::endl; + if (SilentIgnore.Match(Ent->d_name) == false) + _error->Notice(_("Ignoring file '%s' in directory '%s' as it has no filename extension"), Ent->d_name, Dir.c_str()); + continue; + } + } + else if (std::find(Ext.begin(), Ext.end(), d_ext) == Ext.end()) + { + if (Debug == true) + std::clog << "Bad file: " << Ent->d_name << " → bad extension »" << flExtension(Ent->d_name) << "«" << std::endl; + if (SilentIgnore.Match(Ent->d_name) == false) + _error->Notice(_("Ignoring file '%s' in directory '%s' as it has an invalid filename extension"), Ent->d_name, Dir.c_str()); + 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 != '-') { + // no required extension -> dot is a bad character + if (*C == '.' && Ext.empty() == false) + continue; + 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 (period allowed: " << (Ext.empty() ? "no" : "yes") << ")" << 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; +} +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.c_str()) == 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.c_str()) == 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; +} + /*}}}*/ // SafeGetCWD - This is a safer getcwd that returns a dynamic string /*{{{*/ // --------------------------------------------------------------------- /* We return / on failure. */ @@ -211,6 +559,17 @@ string SafeGetCWD() return S; } /*}}}*/ +// GetModificationTime - Get the mtime of the given file or -1 on error /*{{{*/ +// --------------------------------------------------------------------- +/* We return / on failure. */ +time_t GetModificationTime(string const &Path) +{ + struct stat St; + if (stat(Path.c_str(), &St) < 0) + return -1; + return St.st_mtime; +} + /*}}}*/ // flNotDir - Strip the directory from the filename /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -451,10 +810,12 @@ bool ExecWait(pid_t Pid,const char *Name,bool Reap) if (Reap == true) return false; if (WIFSIGNALED(Status) != 0) + { if( WTERMSIG(Status) == SIGSEGV) return _error->Error(_("Sub-process %s received a segmentation fault."),Name); else return _error->Error(_("Sub-process %s received signal %u."),Name, WTERMSIG(Status)); + } if (WIFEXITED(Status) != 0) return _error->Error(_("Sub-process %s returned an error code (%u)"),Name,WEXITSTATUS(Status)); @@ -469,47 +830,338 @@ bool ExecWait(pid_t Pid,const char *Name,bool Reap) // FileFd::Open - Open a file /*{{{*/ // --------------------------------------------------------------------- /* The most commonly used open mode combinations are given with Mode */ -bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms) +bool FileFd::Open(string FileName,unsigned int const Mode,CompressMode Compress, unsigned long const Perms) { - Close(); - Flags = AutoClose; - switch (Mode) + if (Mode == ReadOnlyGzip) + return Open(FileName, ReadOnly, Gzip, Perms); + + if (Compress == Auto && (Mode & WriteOnly) == WriteOnly) + return _error->Error("Autodetection on %s only works in ReadOnly openmode!", FileName.c_str()); + + std::vector const compressors = APT::Configuration::getCompressors(); + std::vector::const_iterator compressor = compressors.begin(); + if (Compress == Auto) { - case ReadOnly: - iFd = open(FileName.c_str(),O_RDONLY); - break; - - case WriteEmpty: + for (; compressor != compressors.end(); ++compressor) { - struct stat Buf; - if (lstat(FileName.c_str(),&Buf) == 0 && S_ISLNK(Buf.st_mode)) - unlink(FileName.c_str()); - iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_TRUNC,Perms); + std::string file = std::string(FileName).append(compressor->Extension); + if (FileExists(file) == false) + continue; + FileName = file; break; } - - case WriteExists: - iFd = open(FileName.c_str(),O_RDWR); - break; + } + else if (Compress == Extension) + { + std::string::size_type const found = FileName.find_last_of('.'); + std::string ext; + if (found != std::string::npos) + { + 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 + { + 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; + case Auto: + case Extension: + // Unreachable + return _error->Error("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()) + return _error->Error("Can't find a configured compressor %s for file %s", name.c_str(), FileName.c_str()); + } - case WriteAny: - iFd = open(FileName.c_str(),O_RDWR | O_CREAT,Perms); - break; + if (compressor == compressors.end()) + return _error->Error("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; - case WriteTemp: + 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()); + if ((Mode & ReadWrite) == 0) + return _error->Error("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)) + { + // for atomic, this will be done by rename in Close() unlink(FileName.c_str()); - iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_EXCL,Perms); - break; - } + } + if ((Mode & Empty) == Empty) + { + struct stat Buf; + if (lstat(FileName.c_str(),&Buf) == 0 && S_ISLNK(Buf.st_mode)) + unlink(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); + + if_FLAGGED_SET(Create, O_CREAT); + if_FLAGGED_SET(Empty, O_TRUNC); + if_FLAGGED_SET(Exclusive, O_EXCL); + else if_FLAGGED_SET(Atomic, O_EXCL); + #undef if_FLAGGED_SET + + if (TemporaryFileName.empty() == false) + iFd = open(TemporaryFileName.c_str(), fileflags, Perms); + else + iFd = open(FileName.c_str(), fileflags, Perms); - if (iFd < 0) - return _error->Errno("open",_("Could not open file %s"),FileName.c_str()); - this->FileName = FileName; + if (iFd == -1 || OpenInternDescriptor(Mode, compressor) == false) + { + if (iFd != -1) + { + close (iFd); + iFd = -1; + } + return _error->Errno("open",_("Could not open file %s"), FileName.c_str()); + } + SetCloseExec(iFd,true); return true; } /*}}}*/ +// FileFd::OpenDescriptor - Open a filedescriptor /*{{{*/ +// --------------------------------------------------------------------- +/* */ +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: + return _error->Error("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()) + return _error->Error("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(); + Flags = (AutoClose) ? FileFd::AutoClose : 0; + iFd = Fd; + this->FileName = ""; + if (OpenInternDescriptor(Mode, compressor) == false) + { + if (AutoClose) + close (iFd); + return _error->Errno("gzdopen",_("Could not open file descriptor %d"), Fd); + } + return true; +} +bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::Compressor const &compressor) +{ + if (d == NULL) + { + d = new FileFdPrivate(); + d->openmode = Mode; + d->compressor = compressor; + } + if (compressor.Name == "." || compressor.Binary.empty() == true) + return true; +#ifdef HAVE_ZLIB + else 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"); + if (d->gz == NULL) + return false; + Flags |= Compressed; + return true; + } +#endif +#ifdef HAVE_BZ2 + else 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) + { + Flags |= Fail; + return _error->Error("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) + { + Flags |= Fail; + return _error->Errno("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) + { + if (Comp == true) + { + dup2(d->compressed_fd,STDOUT_FILENO); + dup2(Pipe[0],STDIN_FILENO); + } + 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]); + if ((Comp == true || FileName.empty() == true) && d->compressed_fd != -1) + close(d->compressed_fd); + + return true; +} + /*}}}*/ // FileFd::~File - Closes the file /*{{{*/ // --------------------------------------------------------------------- /* If the proper modes are selected then we close the Fd and possibly @@ -523,26 +1175,56 @@ FileFd::~FileFd() // --------------------------------------------------------------------- /* We are carefull to handle interruption by a signal while reading gracefully. */ -bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual) +bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual) { int Res; errno = 0; if (Actual != 0) *Actual = 0; - + *((char *)To) = '\0'; do { - Res = read(iFd,To,Size); - if (Res < 0 && errno == EINTR) - continue; +#ifdef HAVE_ZLIB + if (d->gz != NULL) + Res = gzread(d->gz,To,Size); + else +#endif +#ifdef HAVE_BZ2 + if (d->bz2 != NULL) + Res = BZ2_bzread(d->bz2,To,Size); + else +#endif + Res = read(iFd,To,Size); + if (Res < 0) { + if (errno == EINTR) + continue; Flags |= Fail; +#ifdef HAVE_ZLIB + if (d->gz != NULL) + { + int err; + char const * const errmsg = gzerror(d->gz, &err); + if (err != Z_ERRNO) + return _error->Error("gzread: %s (%d: %s)", _("Read error"), err, errmsg); + } +#endif +#ifdef HAVE_BZ2 + if (d->bz2 != NULL) + { + int err; + char const * const errmsg = BZ2_bzerror(d->bz2, &err); + if (err != BZ_IO_ERROR) + return _error->Error("BZ2_bzread: %s (%d: %s)", _("Read error"), err, errmsg); + } +#endif return _error->Errno("read",_("Read error")); } To = (char *)To + Res; Size -= Res; + d->seekpos += Res; if (Actual != 0) *Actual += Res; } @@ -559,29 +1241,87 @@ bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual) } Flags |= Fail; - return _error->Error(_("read, still have %lu to read but none left"),Size); + return _error->Error(_("read, still have %llu to read but none left"), Size); +} + /*}}}*/ +// FileFd::ReadLine - Read a complete line from the file /*{{{*/ +// --------------------------------------------------------------------- +/* Beware: This method can be quiet slow for big buffers on UNcompressed + files because of the naive implementation! */ +char* FileFd::ReadLine(char *To, unsigned long long const Size) +{ + *To = '\0'; +#ifdef HAVE_ZLIB + if (d->gz != NULL) + return gzgets(d->gz, To, Size); +#endif + + unsigned long long read = 0; + 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; + To[read] = '\0'; + return To; } /*}}}*/ // FileFd::Write - Write to the file /*{{{*/ // --------------------------------------------------------------------- /* */ -bool FileFd::Write(const void *From,unsigned long Size) +bool FileFd::Write(const void *From,unsigned long long Size) { int Res; errno = 0; do { - Res = write(iFd,From,Size); +#ifdef HAVE_ZLIB + if (d->gz != NULL) + Res = gzwrite(d->gz,From,Size); + else +#endif +#ifdef HAVE_BZ2 + if (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; +#ifdef HAVE_ZLIB + if (d->gz != NULL) + { + int err; + char const * const errmsg = gzerror(d->gz, &err); + if (err != Z_ERRNO) + return _error->Error("gzwrite: %s (%d: %s)", _("Write error"), err, errmsg); + } +#endif +#ifdef HAVE_BZ2 + if (d->bz2 != NULL) + { + int err; + char const * const errmsg = BZ2_bzerror(d->bz2, &err); + if (err != BZ_IO_ERROR) + return _error->Error("BZ2_bzwrite: %s (%d: %s)", _("Write error"), err, errmsg); + } +#endif return _error->Errno("write",_("Write error")); } From = (char *)From + Res; Size -= Res; + d->seekpos += Res; } while (Res > 0 && Size > 0); @@ -589,46 +1329,165 @@ bool FileFd::Write(const void *From,unsigned long Size) return true; Flags |= Fail; - return _error->Error(_("write, still have %lu to write but couldn't"),Size); + return _error->Error(_("write, still have %llu to write but couldn't"), Size); +} +bool FileFd::Write(int Fd, const void *From, unsigned long long Size) +{ + int 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); } /*}}}*/ // FileFd::Seek - Seek in the file /*{{{*/ // --------------------------------------------------------------------- /* */ -bool FileFd::Seek(unsigned long To) +bool FileFd::Seek(unsigned long long To) { - if (lseek(iFd,To,SEEK_SET) != (signed)To) + if (d->pipe == true +#ifdef HAVE_BZ2 + || d->bz2 != NULL +#endif + ) + { + // 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) + { + Flags |= Fail; + return _error->Error("Reopen is only implemented for read-only files!"); + } +#ifdef HAVE_BZ2 + if (d->bz2 != NULL) + BZ2_bzclose(d->bz2); +#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) + { + Flags |= Fail; + return _error->Error("Reopen is not implemented for pipes opened with FileFd::OpenDescriptor()!"); + } + } + + if (OpenInternDescriptor(d->openmode, d->compressor) == false) + { + Flags |= Fail; + return _error->Error("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 HAVE_ZLIB + if (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 %lu",To); + return _error->Error("Unable to seek to %llu", To); } - + + d->seekpos = To; return true; } /*}}}*/ // FileFd::Skip - Seek in the file /*{{{*/ // --------------------------------------------------------------------- /* */ -bool FileFd::Skip(unsigned long Over) +bool FileFd::Skip(unsigned long long Over) { - if (lseek(iFd,Over,SEEK_CUR) < 0) + if (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) + { + Flags |= Fail; + return _error->Error("Unable to seek ahead %llu",Over); + } + Over -= toread; + } + return true; + } + + int res; +#ifdef HAVE_ZLIB + if (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 %lu",Over); + return _error->Error("Unable to seek ahead %llu",Over); } - + d->seekpos = res; + return true; } /*}}}*/ // FileFd::Truncate - Truncate the file /*{{{*/ // --------------------------------------------------------------------- /* */ -bool FileFd::Truncate(unsigned long To) +bool FileFd::Truncate(unsigned long long To) { +#if defined HAVE_ZLIB || defined HAVE_BZ2 + if (d->gz != NULL || d->bz2 != NULL) + { + Flags |= Fail; + return _error->Error("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 %lu",To); + return _error->Error("Unable to truncate to %llu",To); } return true; @@ -637,40 +1496,213 @@ bool FileFd::Truncate(unsigned long To) // FileFd::Tell - Current seek position /*{{{*/ // --------------------------------------------------------------------- /* */ -unsigned long FileFd::Tell() +unsigned long long FileFd::Tell() { - off_t Res = lseek(iFd,0,SEEK_CUR); + // 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->pipe == true +#ifdef HAVE_BZ2 + || d->bz2 != NULL +#endif + ) + return d->seekpos; + + off_t Res; +#ifdef HAVE_ZLIB + if (d->gz != NULL) + Res = gztell(d->gz); + else +#endif + Res = lseek(iFd,0,SEEK_CUR); if (Res == (off_t)-1) + { + Flags |= Fail; _error->Errno("lseek","Failed to determine the current file position"); + } + d->seekpos = Res; return Res; } /*}}}*/ -// FileFd::Size - Return the size of the file /*{{{*/ +// FileFd::FileSize - Return the size of the file /*{{{*/ // --------------------------------------------------------------------- /* */ -unsigned long FileFd::Size() +unsigned long long FileFd::FileSize() { struct stat Buf; - if (fstat(iFd,&Buf) != 0) + if (d->pipe == false && fstat(iFd,&Buf) != 0) + { + Flags |= Fail; return _error->Errno("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)) + { + // 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 (stat(FileName.c_str(), &Buf) != 0) + { + Flags |= Fail; + return _error->Errno("stat","Unable to determine the file size"); + } + } + return Buf.st_size; } /*}}}*/ +// FileFd::Size - Return the size of the content in the file /*{{{*/ +// --------------------------------------------------------------------- +/* */ +unsigned long long FileFd::Size() +{ + unsigned long long size = FileSize(); + + // 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 +#ifdef HAVE_BZ2 + || (d->bz2 && size > 0) +#endif + ) + { + unsigned long long const oldSeek = Tell(); + char ignore[1000]; + unsigned long long read = 0; + do { + Read(ignore, sizeof(ignore), &read); + } while(read != 0); + size = Tell(); + Seek(oldSeek); + } +#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) + { + 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 + if (lseek(iFd, -4, SEEK_END) < 0) + { + Flags |= Fail; + return _error->Errno("lseek","Unable to seek to end of gzipped file"); + } + size = 0L; + if (read(iFd, &size, 4) != 4) + { + Flags |= Fail; + return _error->Errno("read","Unable to read original size of gzipped file"); + } + +#ifdef WORDS_BIGENDIAN + uint32_t tmp_size = size; + uint8_t const * const p = (uint8_t const * const) &tmp_size; + tmp_size = (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]; + size = tmp_size; +#endif + + if (lseek(iFd, oldPos, SEEK_SET) < 0) + { + Flags |= Fail; + return _error->Errno("lseek","Unable to seek in gzipped file"); + } + + return size; + } +#endif + + return size; +} + /*}}}*/ +// FileFd::ModificationTime - Return the time of last touch /*{{{*/ +// --------------------------------------------------------------------- +/* */ +time_t FileFd::ModificationTime() +{ + struct stat Buf; + if (d->pipe == false && fstat(iFd,&Buf) != 0) + { + Flags |= Fail; + _error->Errno("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)) + { + // 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 (stat(FileName.c_str(), &Buf) != 0) + { + Flags |= Fail; + _error->Errno("fstat","Unable to determine the modification time of file %s", FileName.c_str()); + return 0; + } + } + + return Buf.st_mtime; +} + /*}}}*/ // FileFd::Close - Close the file if the close flag is set /*{{{*/ // --------------------------------------------------------------------- /* */ bool FileFd::Close() { + if (iFd == -1) + return true; + bool Res = true; if ((Flags & AutoClose) == AutoClose) - if (iFd >= 0 && close(iFd) != 0) - Res &= _error->Errno("close",_("Problem closing the file")); + { +#ifdef HAVE_ZLIB + if (d != NULL && d->gz != NULL) { + int const e = gzclose(d->gz); + // 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()); + } else +#endif +#ifdef HAVE_BZ2 + if (d != NULL && d->bz2 != NULL) + BZ2_bzclose(d->bz2); + else +#endif + if (iFd > 0 && close(iFd) != 0) + Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str()); + } + + if ((Flags & Replace) == Replace && iFd >= 0) { + 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()); + + FileName = TemporaryFileName; // for the unlink() below. + TemporaryFileName.clear(); + } + iFd = -1; - + if ((Flags & Fail) == Fail && (Flags & DelOnFail) == DelOnFail && FileName.empty() == false) if (unlink(FileName.c_str()) != 0) - Res &= _error->WarningE("unlnk",_("Problem unlinking the file")); + Res &= _error->WarningE("unlnk",_("Problem unlinking the file %s"), FileName.c_str()); + + if (d != NULL) + { + if (d->compressor_pid > 0) + ExecWait(d->compressor_pid, "FileFdCompressor", true); + delete d; + d = NULL; + } + + if (Res == false) + Flags |= Fail; return Res; } /*}}}*/ @@ -681,8 +1713,13 @@ bool FileFd::Sync() { #ifdef _POSIX_SYNCHRONIZED_IO if (fsync(iFd) != 0) + { + Flags |= Fail; return _error->Errno("sync",_("Problem syncing the file")); + } #endif return true; } /*}}}*/ + +gzFile FileFd::gzFd() { return (gzFile) d->gz; }