X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/f39daeb1f66b8910f91274055bf07c3d008cdc50..3383ef4d30b3fb1057e21f5598d3128b9afbe34d:/apt-pkg/contrib/fileutl.h diff --git a/apt-pkg/contrib/fileutl.h b/apt-pkg/contrib/fileutl.h index 3ec01dd9a..f33f7804b 100644 --- a/apt-pkg/contrib/fileutl.h +++ b/apt-pkg/contrib/fileutl.h @@ -26,6 +26,8 @@ #include #include +#include +#include #include @@ -39,6 +41,13 @@ using std::string; class FileFdPrivate; class FileFd { + friend class FileFdPrivate; + friend class GzipFileFdPrivate; + friend class Bz2FileFdPrivate; + friend class LzmaFileFdPrivate; + friend class Lz4FileFdPrivate; + friend class DirectFileFdPrivate; + friend class PipedFileFdPrivate; protected: int iFd; @@ -58,6 +67,7 @@ class FileFd Exclusive = (1 << 3), Atomic = Exclusive | (1 << 4), Empty = (1 << 5), + BufferedWrite = (1 << 6), WriteEmpty = ReadWrite | Create | Empty, WriteExists = ReadWrite, @@ -66,7 +76,7 @@ class FileFd ReadOnlyGzip, WriteAtomic = ReadWrite | Create | Atomic }; - enum CompressMode { Auto = 'A', None = 'N', Extension = 'E', Gzip = 'G', Bzip2 = 'B', Lzma = 'L', Xz = 'X' }; + enum CompressMode { Auto = 'A', None = 'N', Extension = 'E', Gzip = 'G', Bzip2 = 'B', Lzma = 'L', Xz = 'X', Lz4='4' }; inline bool Read(void *To,unsigned long long Size,bool AllowEof) { @@ -77,13 +87,16 @@ class FileFd } bool Read(void *To,unsigned long long Size,unsigned long long *Actual = 0); char* ReadLine(char *To, unsigned long long const Size); + bool Flush(); bool Write(const void *From,unsigned long long Size); bool static Write(int Fd, const void *From, unsigned long long Size); bool Seek(unsigned long long To); bool Skip(unsigned long long To); bool Truncate(unsigned long long To); unsigned long long Tell(); + // the size of the file content (compressed files will be uncompressed first) unsigned long long Size(); + // the size of the file itself unsigned long long FileSize(); time_t ModificationTime(); @@ -91,9 +104,9 @@ class FileFd to be able to support large files (>2 or >4 GB) properly. This shouldn't happen all to often for the indexes, but deb's might be… And as the auto-conversation converts a 'unsigned long *' to a 'bool' - instead of 'unsigned long long *' we need to provide this explicitely - + instead of 'unsigned long long *' we need to provide this explicitly - otherwise applications magically start to fail… */ - __deprecated bool Read(void *To,unsigned long long Size,unsigned long *Actual) + bool Read(void *To,unsigned long long Size,unsigned long *Actual) APT_DEPRECATED_MSG("The Actual variable you pass in should be an unsigned long long") { unsigned long long R; bool const T = Read(To, Size, &R); @@ -101,10 +114,10 @@ class FileFd return T; } - bool Open(std::string FileName,unsigned int const Mode,CompressMode Compress,unsigned long const Perms = 0666); - bool Open(std::string FileName,unsigned int const Mode,APT::Configuration::Compressor const &compressor,unsigned long const Perms = 0666); - inline bool Open(std::string const &FileName,unsigned int const Mode, unsigned long const Perms = 0666) { - return Open(FileName, Mode, None, Perms); + bool Open(std::string FileName,unsigned int const Mode,CompressMode Compress,unsigned long const AccessMode = 0666); + bool Open(std::string FileName,unsigned int const Mode,APT::Configuration::Compressor const &compressor,unsigned long const AccessMode = 0666); + inline bool Open(std::string const &FileName,unsigned int const Mode, unsigned long const AccessMode = 0666) { + return Open(FileName, Mode, None, AccessMode); }; bool OpenDescriptor(int Fd, unsigned int const Mode, CompressMode Compress, bool AutoClose=false); bool OpenDescriptor(int Fd, unsigned int const Mode, APT::Configuration::Compressor const &compressor, bool AutoClose=false); @@ -117,7 +130,7 @@ class FileFd // Simple manipulators inline int Fd() {return iFd;}; inline void Fd(int fd) { OpenDescriptor(fd, ReadWrite);}; - __deprecated gzFile gzFd(); + gzFile gzFd() APT_DEPRECATED_MSG("Implementation detail, do not use to be able to support bzip2, xz and co") APT_PURE; inline bool IsOpen() {return iFd >= 0;}; inline bool Failed() {return (Flags & Fail) == Fail;}; @@ -126,43 +139,40 @@ class FileFd inline bool Eof() {return (Flags & HitEof) == HitEof;}; inline bool IsCompressed() {return (Flags & Compressed) == Compressed;}; inline std::string &Name() {return FileName;}; - - FileFd(std::string FileName,unsigned int const Mode,unsigned long Perms = 0666) : iFd(-1), Flags(0), d(NULL) - { - Open(FileName,Mode, None, Perms); - }; - FileFd(std::string FileName,unsigned int const Mode, CompressMode Compress, unsigned long Perms = 0666) : iFd(-1), Flags(0), d(NULL) - { - Open(FileName,Mode, Compress, Perms); - }; - FileFd() : iFd(-1), Flags(AutoClose), d(NULL) {}; - FileFd(int const Fd, unsigned int const Mode = ReadWrite, CompressMode Compress = None) : iFd(-1), Flags(0), d(NULL) - { - OpenDescriptor(Fd, Mode, Compress); - }; - FileFd(int const Fd, bool const AutoClose) : iFd(-1), Flags(0), d(NULL) - { - OpenDescriptor(Fd, ReadWrite, None, AutoClose); - }; + + FileFd(std::string FileName,unsigned int const Mode,unsigned long AccessMode = 0666); + FileFd(std::string FileName,unsigned int const Mode, CompressMode Compress, unsigned long AccessMode = 0666); + FileFd(); + FileFd(int const Fd, unsigned int const Mode = ReadWrite, CompressMode Compress = None); + FileFd(int const Fd, bool const AutoClose); virtual ~FileFd(); private: - FileFdPrivate* d; - bool OpenInternDescriptor(unsigned int const Mode, APT::Configuration::Compressor const &compressor); + FileFdPrivate * d; + APT_HIDDEN FileFd & operator=(const FileFd &); + APT_HIDDEN bool OpenInternDescriptor(unsigned int const Mode, APT::Configuration::Compressor const &compressor); // private helpers to set Fail flag and call _error->Error - bool FileFdErrno(const char* Function, const char* Description,...) __like_printf(3) __cold; - bool FileFdError(const char* Description,...) __like_printf(2) __cold; + APT_HIDDEN bool FileFdErrno(const char* Function, const char* Description,...) APT_PRINTF(3) APT_COLD; + APT_HIDDEN bool FileFdError(const char* Description,...) APT_PRINTF(2) APT_COLD; }; bool RunScripts(const char *Cnf); bool CopyFile(FileFd &From,FileFd &To); +bool RemoveFile(char const * const Function, std::string const &FileName); int GetLock(std::string File,bool Errors = true); bool FileExists(std::string File); bool RealFileExists(std::string File); -bool DirectoryExists(std::string const &Path) __attrib_const; +bool DirectoryExists(std::string const &Path) APT_CONST; bool CreateDirectory(std::string const &Parent, std::string const &Path); time_t GetModificationTime(std::string const &Path); +bool Rename(std::string From, std::string To); + +std::string GetTempDir(); +std::string GetTempDir(std::string const &User); +FileFd* GetTempFile(std::string const &Prefix = "", + bool ImmediateUnlink = true, + FileFd * const TmpFd = NULL); /** \brief Ensure the existence of the given Path * @@ -182,8 +192,38 @@ void SetCloseExec(int Fd,bool Close); void SetNonBlock(int Fd,bool Block); bool WaitFd(int Fd,bool write = false,unsigned long timeout = 0); pid_t ExecFork(); +pid_t ExecFork(std::set keep_fds); +void MergeKeepFdsFromConfiguration(std::set &keep_fds); bool ExecWait(pid_t Pid,const char *Name,bool Reap = false); +// check if the given file starts with a PGP cleartext signature +bool StartsWithGPGClearTextSignature(std::string const &FileName); + +/** change file attributes to requested known good values + * + * The method skips the user:group setting if not root. + * + * @param requester is printed as functionname in error cases + * @param file is the file to be modified + * @param user is the (new) owner of the file, e.g. _apt + * @param group is the (new) group owning the file, e.g. root + * @param mode is the access mode of the file, e.g. 0644 + */ +bool ChangeOwnerAndPermissionOfFile(char const * const requester, char const * const file, char const * const user, char const * const group, mode_t const mode); + +/** + * \brief Drop privileges + * + * Drop the privileges to the user _apt (or the one specified in + * APT::Sandbox::User). This does not set the supplementary group + * ids up correctly, it only uses the default group. Also prevent + * the process from gaining any new privileges afterwards, at least + * on Linux. + * + * \return true on success, false on failure with _error set + */ +bool DropPrivileges(); + // File string manipulators std::string flNotDir(std::string File); std::string flNotFile(std::string File); @@ -191,4 +231,23 @@ std::string flNoLink(std::string File); std::string flExtension(std::string File); std::string flCombine(std::string Dir,std::string File); +/** \brief Takes a file path and returns the absolute path + */ +std::string flAbsPath(std::string File); + +// simple c++ glob +std::vector Glob(std::string const &pattern, int flags=0); + +/** \brief Popen() implementation that execv() instead of using a shell + * + * \param Args the execv style command to run + * \param FileFd is a referenz to the FileFd to use for input or output + * \param Child a reference to the integer that stores the child pid + * Note that you must call ExecWait() or similar to cleanup + * \param Mode is either FileFd::ReadOnly or FileFd::WriteOnly + * \return true on success, false on failure with _error set + */ +bool Popen(const char* Args[], FileFd &Fd, pid_t &Child, FileFd::OpenMode Mode); + + #endif