X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/a02db58fd50ef7fc2f0284852c6b3f98e458a232..61db48241f2d46697a291bfedaf398a1ca9a70e3:/apt-pkg/contrib/fileutl.h

diff --git a/apt-pkg/contrib/fileutl.h b/apt-pkg/contrib/fileutl.h
index 35f3ab0f4..4a1676dc2 100644
--- a/apt-pkg/contrib/fileutl.h
+++ b/apt-pkg/contrib/fileutl.h
@@ -41,6 +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;
  
@@ -60,6 +67,7 @@ class FileFd
 	Exclusive = (1 << 3),
 	Atomic = Exclusive | (1 << 4),
 	Empty = (1 << 5),
+	BufferedWrite = (1 << 6),
 
 	WriteEmpty = ReadWrite | Create | Empty,
 	WriteExists = ReadWrite,
@@ -68,7 +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)
    {
@@ -78,14 +86,18 @@ class FileFd
       return Read(To,Size);
    }   
    bool Read(void *To,unsigned long long Size,unsigned long long *Actual = 0);
+   bool static Read(int const Fd, void *To, unsigned long long Size, unsigned long long * const 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();
 
@@ -93,9 +105,9 @@ 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… */
-   bool Read(void *To,unsigned long long Size,unsigned long *Actual) APT_DEPRECATED
+   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);
@@ -103,10 +115,10 @@ 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);
@@ -119,7 +131,7 @@ class FileFd
    // Simple manipulators
    inline int Fd() {return iFd;};
    inline void Fd(int fd) { OpenDescriptor(fd, ReadWrite);};
-   gzFile gzFd() APT_DEPRECATED APT_PURE;
+   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;};
@@ -128,45 +140,40 @@ 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,...) APT_PRINTF(3) APT_COLD;
-   bool FileFdError(const char* Description,...) APT_PRINTF(2) APT_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) 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
  *
@@ -190,6 +197,34 @@ pid_t ExecFork(std::set<int> keep_fds);
 void MergeKeepFdsFromConfiguration(std::set<int> &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);
@@ -197,7 +232,25 @@ 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);
+/** \brief removes superfluous /./ and // from path */
+APT_HIDDEN std::string flNormalize(std::string file);
+
 // simple c++ glob
 std::vector<std::string> 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