X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/67da93c38eb3904b36537e025e2f63f77d830e20..468720c59fcf48b20332cdb7b601b2b0d7cbbfbb:/apt-pkg/contrib/fileutl.cc diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc index 50019872e..1cb3fab1e 100644 --- a/apt-pkg/contrib/fileutl.cc +++ b/apt-pkg/contrib/fileutl.cc @@ -18,14 +18,15 @@ ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ +#include + #include #include #include #include +#include #include -#include - #include #include #include @@ -43,10 +44,11 @@ #include #include -#include #ifdef WORDS_BIGENDIAN #include #endif + +#include /*}}}*/ using namespace std; @@ -132,10 +134,10 @@ 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; @@ -446,6 +448,17 @@ 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 /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -706,84 +719,181 @@ 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,OpenMode Mode,CompressMode Compress, unsigned long Perms) { + if (Mode == ReadOnlyGzip) + return Open(FileName, ReadOnly, Gzip, Perms); Close(); Flags = AutoClose; - switch (Mode) - { - case ReadOnly: - iFd = open(FileName.c_str(),O_RDONLY); - break; - case ReadOnlyGzip: - iFd = open(FileName.c_str(),O_RDONLY); - if (iFd > 0) { - gz = gzdopen (iFd, "r"); - if (gz == NULL) { - close (iFd); - iFd = -1; - } - } - break; - - case WriteAtomic: + 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 + + // 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) { - Flags |= Replace; - char *name = strdup((FileName + ".XXXXXX").c_str()); - TemporaryFileName = string(mktemp(name)); - iFd = open(TemporaryFileName.c_str(),O_RDWR | O_CREAT | O_EXCL,Perms); - free(name); + 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; } - - case WriteEmpty: + } + else if (Compress == Extension) + { + Compress = None; + std::string ext = flExtension(FileName); + if (ext != FileName) { - 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); - break; + ext = "." + ext; + for (; compressor != compressors.end(); ++compressor) + if (ext == compressor->Extension) + break; } - - case WriteExists: - iFd = open(FileName.c_str(),O_RDWR); - break; + } + else if (Compress != None) + { + std::string name; + switch (Compress) + { + 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()); + } + 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()); + } - case WriteAny: - iFd = open(FileName.c_str(),O_RDWR | O_CREAT,Perms); - break; + // if we have them, use inbuilt compressors instead of forking + if (compressor != compressors.end()) + { + if (compressor->Name == "gzip") + { + Compress = Gzip; + compressor = compressors.end(); + } + else if (compressor->Name == "." || Compress == None) + { + Compress = None; + compressor = compressors.end(); + } + } - case WriteTemp: + 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()); + } + + if (compressor != compressors.end()) + { + if ((Mode & ReadWrite) == ReadWrite) + _error->Error("External compressors like %s do not support readwrite mode for file %s", compressor->Name.c_str(), FileName.c_str()); + + _error->Error("Forking external compressor %s is not implemented for %s", compressor->Name.c_str(), FileName.c_str()); + } + else + { + if (TemporaryFileName.empty() == false) + iFd = open(TemporaryFileName.c_str(), fileflags, Perms); + else + iFd = open(FileName.c_str(), fileflags, Perms); + + if (iFd != -1) + { + if (OpenInternDescriptor(Mode, Compress) == false) + { + close (iFd); + iFd = -1; + } + } + } - if (iFd < 0) + if (iFd == -1) return _error->Errno("open",_("Could not open file %s"),FileName.c_str()); - + this->FileName = FileName; SetCloseExec(iFd,true); return true; } - -bool FileFd::OpenDescriptor(int Fd, OpenMode Mode, bool AutoClose) + /*}}}*/ +// FileFd::OpenDescriptor - Open a filedescriptor /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool FileFd::OpenDescriptor(int Fd, OpenMode Mode, CompressMode Compress, bool AutoClose) { Close(); Flags = (AutoClose) ? FileFd::AutoClose : 0; iFd = Fd; - if (Mode == ReadOnlyGzip) { - gz = gzdopen (iFd, "r"); - if (gz == NULL) { - if (AutoClose) - close (iFd); - return _error->Errno("gzdopen",_("Could not open file descriptor %d"), - Fd); - } + if (OpenInternDescriptor(Mode, Compress) == false) + { + if (AutoClose) + close (iFd); + return _error->Errno("gzdopen",_("Could not open file descriptor %d"), Fd); } this->FileName = ""; return true; +} +bool FileFd::OpenInternDescriptor(OpenMode Mode, CompressMode Compress) +{ + if (Compress == None) + return true; + else if (Compress == Gzip) + { + if ((Mode & ReadWrite) == ReadWrite) + gz = gzdopen(iFd, "r+"); + else if ((Mode & WriteOnly) == WriteOnly) + gz = gzdopen(iFd, "w"); + else + gz = gzdopen (iFd, "r"); + if (gz == NULL) + return false; + } + else + return false; + return true; } /*}}}*/ // FileFd::~File - Closes the file /*{{{*/ @@ -799,7 +909,7 @@ 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; @@ -838,13 +948,13 @@ 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::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; @@ -871,13 +981,13 @@ 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); } /*}}}*/ // FileFd::Seek - Seek in the file /*{{{*/ // --------------------------------------------------------------------- /* */ -bool FileFd::Seek(unsigned long To) +bool FileFd::Seek(unsigned long long To) { int res; if (gz) @@ -887,7 +997,7 @@ bool FileFd::Seek(unsigned long To) if (res != (signed)To) { Flags |= Fail; - return _error->Error("Unable to seek to %lu",To); + return _error->Error("Unable to seek to %llu", To); } return true; @@ -896,7 +1006,7 @@ bool FileFd::Seek(unsigned long To) // FileFd::Skip - Seek in the file /*{{{*/ // --------------------------------------------------------------------- /* */ -bool FileFd::Skip(unsigned long Over) +bool FileFd::Skip(unsigned long long Over) { int res; if (gz) @@ -906,7 +1016,7 @@ bool FileFd::Skip(unsigned long Over) if (res < 0) { Flags |= Fail; - return _error->Error("Unable to seek ahead %lu",Over); + return _error->Error("Unable to seek ahead %llu",Over); } return true; @@ -915,7 +1025,7 @@ bool FileFd::Skip(unsigned long Over) // FileFd::Truncate - Truncate the file /*{{{*/ // --------------------------------------------------------------------- /* */ -bool FileFd::Truncate(unsigned long To) +bool FileFd::Truncate(unsigned long long To) { if (gz) { @@ -925,7 +1035,7 @@ bool FileFd::Truncate(unsigned long To) 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; @@ -934,7 +1044,7 @@ bool FileFd::Truncate(unsigned long To) // FileFd::Tell - Current seek position /*{{{*/ // --------------------------------------------------------------------- /* */ -unsigned long FileFd::Tell() +unsigned long long FileFd::Tell() { off_t Res; if (gz) @@ -949,7 +1059,7 @@ unsigned long FileFd::Tell() // FileFd::FileSize - Return the size of the file /*{{{*/ // --------------------------------------------------------------------- /* */ -unsigned long FileFd::FileSize() +unsigned long long FileFd::FileSize() { struct stat Buf; @@ -961,9 +1071,9 @@ unsigned long FileFd::FileSize() // FileFd::Size - Return the size of the content in the file /*{{{*/ // --------------------------------------------------------------------- /* */ -unsigned long FileFd::Size() +unsigned long long FileFd::Size() { - unsigned long size = FileSize(); + unsigned long long size = FileSize(); // only check gzsize if we are actually a gzip file, just checking for // "gz" is not sufficient as uncompressed files will be opened with @@ -973,6 +1083,7 @@ unsigned long FileFd::Size() /* 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"); @@ -1018,6 +1129,7 @@ bool FileFd::Close() 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;