Adding upstream version 2.6.1.upstream/2.6.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 287 insertions, 0 deletions

diff --git a/apt-pkg/contrib/fileutl.h b/apt-pkg/contrib/fileutl.h
new file mode 100644
index 0000000..970b118
--- /dev/null
+++ b/apt-pkg/contrib/fileutl.h
@@ -0,0 +1,287 @@
+// -*- mode: cpp; mode: fold -*-
+// SPDX-License-Identifier: GPL-2.0+
+// Description								/*{{{*/
+/* ######################################################################
+   
+   File Utilities
+   
+   CopyFile - Buffered copy of a single file
+   GetLock - dpkg compatible lock file manipulation (fcntl)
+   FileExists - Returns true if the file exists
+   SafeGetCWD - Returns the CWD in a string with overrun protection 
+   
+   The file class is a handy abstraction for various functions+classes
+   that need to accept filenames.
+   
+   This file had this historic note, but now includes further changes
+   under the GPL-2.0+:
+
+   This source is placed in the Public Domain, do with it what you will
+   It was originally written by Jason Gunthorpe.
+   
+   ##################################################################### */
+									/*}}}*/
+#ifndef PKGLIB_FILEUTL_H
+#define PKGLIB_FILEUTL_H
+
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/macros.h>
+
+#include <set>
+#include <string>
+#include <vector>
+#include <sys/stat.h>
+#include <time.h>
+
+/* Define this for python-apt */
+#define APT_HAS_GZIP 1
+
+class FileFdPrivate;
+class APT_PUBLIC FileFd
+{
+   friend class FileFdPrivate;
+   friend class GzipFileFdPrivate;
+   friend class Bz2FileFdPrivate;
+   friend class LzmaFileFdPrivate;
+   friend class Lz4FileFdPrivate;
+   friend class ZstdFileFdPrivate;
+   friend class DirectFileFdPrivate;
+   friend class PipedFileFdPrivate;
+   protected:
+   int iFd;
+ 
+   enum LocalFlags {AutoClose = (1<<0),Fail = (1<<1),DelOnFail = (1<<2),
+                    HitEof = (1<<3), Replace = (1<<4), Compressed = (1<<5) };
+   unsigned long Flags;
+   std::string FileName;
+   std::string TemporaryFileName;
+
+   public:
+   enum OpenMode {
+	ReadOnly = (1 << 0),
+	WriteOnly = (1 << 1),
+	ReadWrite = ReadOnly | WriteOnly,
+
+	Create = (1 << 2),
+	Exclusive = (1 << 3),
+	Atomic = Exclusive | (1 << 4),
+	Empty = (1 << 5),
+	BufferedWrite = (1 << 6),
+
+	WriteEmpty = ReadWrite | Create | Empty,
+	WriteExists = ReadWrite,
+	WriteAny = ReadWrite | Create,
+	WriteTemp = ReadWrite | Create | Exclusive,
+	ReadOnlyGzip,
+	WriteAtomic = ReadWrite | Create | Atomic
+   };
+   enum CompressMode
+   {
+      Auto = 'A',
+      None = 'N',
+      Extension = 'E',
+      Gzip = 'G',
+      Bzip2 = 'B',
+      Lzma = 'L',
+      Xz = 'X',
+      Lz4 = '4',
+      Zstd = 'Z'
+   };
+
+   inline bool Read(void *To,unsigned long long Size,bool AllowEof)
+   {
+      unsigned long long Jnk;
+      if (AllowEof)
+	 return Read(To,Size,&Jnk);
+      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);
+   /** read a complete line or until buffer is full
+    *
+    * The buffer will always be \\0 terminated, so at most Size-1 characters are read.
+    * If the buffer holds a complete line the last character (before \\0) will be
+    * the newline character \\n otherwise the line was longer than the buffer.
+    *
+    * @param To buffer which will hold the line
+    * @param Size of the buffer to fill
+    * @param \b nullptr is returned in error cases, otherwise
+    * the parameter \b To now filled with the line.
+    */
+   char* ReadLine(char *To, unsigned long long const Size);
+   /** read a complete line from the file
+    *
+    *  Similar to std::getline() the string does \b not include
+    *  the newline, but just the content of the line as the newline
+    *  is not needed to distinguish cases as for the other #ReadLine method.
+    *
+    *  @param To string which will hold the line
+    *  @return \b true if successful, otherwise \b false
+    */
+   bool ReadLine(std::string &To);
+   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();
+
+   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);
+   inline bool OpenDescriptor(int Fd, unsigned int const Mode, bool AutoClose=false) {
+      return OpenDescriptor(Fd, Mode, None, AutoClose);
+   };
+   bool Close();
+   bool Sync();
+   
+   // Simple manipulators
+   inline int Fd() {return iFd;};
+   inline void Fd(int fd) { OpenDescriptor(fd, ReadWrite);};
+
+   inline bool IsOpen() {return iFd >= 0;};
+   inline bool Failed() {return (Flags & Fail) == Fail;};
+   inline void EraseOnFailure() {Flags |= DelOnFail;};
+   inline void OpFail() {Flags |= Fail;};
+   inline bool Eof() {return (Flags & HitEof) == HitEof;};
+   inline bool IsCompressed() {return (Flags & Compressed) == Compressed;};
+   inline std::string &Name() {return FileName;};
+   inline void SetFileName(std::string const &name) { FileName = name; };
+
+   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;
+   APT_HIDDEN FileFd(const FileFd &);
+   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
+   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;
+};
+
+APT_PUBLIC bool RunScripts(const char *Cnf);
+APT_PUBLIC bool CopyFile(FileFd &From,FileFd &To);
+APT_PUBLIC bool RemoveFile(char const * const Function, std::string const &FileName);
+APT_PUBLIC bool RemoveFileAt(char const * const Function, int const dirfd, std::string const &FileName);
+APT_PUBLIC int GetLock(std::string File,bool Errors = true);
+APT_PUBLIC bool FileExists(std::string File);
+APT_PUBLIC bool RealFileExists(std::string File);
+APT_PUBLIC bool DirectoryExists(std::string const &Path);
+APT_PUBLIC bool CreateDirectory(std::string const &Parent, std::string const &Path);
+APT_PUBLIC time_t GetModificationTime(std::string const &Path);
+APT_PUBLIC bool Rename(std::string From, std::string To);
+
+APT_PUBLIC std::string GetTempDir();
+APT_PUBLIC std::string GetTempDir(std::string const &User);
+APT_PUBLIC FileFd* GetTempFile(std::string const &Prefix = "",
+                    bool ImmediateUnlink = true,
+		    FileFd * const TmpFd = NULL);
+
+// FIXME: GetTempFile should always return a buffered file
+APT_HIDDEN FileFd* GetTempFile(std::string const &Prefix,
+                    bool ImmediateUnlink ,
+		    FileFd * const TmpFd,
+          bool Buffered);
+
+/** \brief Ensure the existence of the given Path
+ *
+ *  \param Parent directory of the Path directory - a trailing
+ *  /apt/ will be removed before CreateDirectory call.
+ *  \param Path which should exist after (successful) call
+ */
+APT_PUBLIC bool CreateAPTDirectoryIfNeeded(std::string const &Parent, std::string const &Path);
+
+APT_PUBLIC std::vector<std::string> GetListOfFilesInDir(std::string const &Dir, std::string const &Ext,
+					bool const &SortList, bool const &AllowNoExt=false);
+APT_PUBLIC std::vector<std::string> GetListOfFilesInDir(std::string const &Dir, std::vector<std::string> const &Ext,
+					bool const &SortList);
+APT_PUBLIC std::vector<std::string> GetListOfFilesInDir(std::string const &Dir, bool SortList);
+APT_PUBLIC std::string SafeGetCWD();
+APT_PUBLIC void SetCloseExec(int Fd,bool Close);
+APT_PUBLIC void SetNonBlock(int Fd,bool Block);
+APT_PUBLIC bool WaitFd(int Fd,bool write = false,unsigned long timeout = 0);
+APT_PUBLIC pid_t ExecFork();
+APT_PUBLIC pid_t ExecFork(std::set<int> keep_fds);
+APT_PUBLIC void MergeKeepFdsFromConfiguration(std::set<int> &keep_fds);
+APT_PUBLIC bool ExecWait(pid_t Pid,const char *Name,bool Reap = false);
+
+// check if the given file starts with a PGP cleartext signature
+APT_PUBLIC 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
+ */
+APT_PUBLIC 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
+ */
+APT_PUBLIC bool DropPrivileges();
+
+// File string manipulators
+APT_PUBLIC std::string flNotDir(std::string File);
+APT_PUBLIC std::string flNotFile(std::string File);
+APT_PUBLIC std::string flNoLink(std::string File);
+APT_PUBLIC std::string flExtension(std::string File);
+APT_PUBLIC std::string flCombine(std::string Dir,std::string File);
+
+/** \brief Takes a file path and returns the absolute path
+ */
+APT_PUBLIC std::string flAbsPath(std::string File);
+/** \brief removes superfluous /./ and // from path */
+APT_HIDDEN std::string flNormalize(std::string file);
+
+// simple c++ glob
+APT_PUBLIC 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 reference 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
+ * \param CaptureStderr True if we should capture stderr in addition to stdout.
+ *                      (default: True).
+ * \param Sandbox True if this should run sandboxed
+ * \return true on success, false on failure with _error set
+ */
+APT_PUBLIC bool Popen(const char *Args[], FileFd &Fd, pid_t &Child, FileFd::OpenMode Mode, bool CaptureStderr = true, bool Sandbox = false);
+
+APT_HIDDEN bool OpenConfigurationFileFd(std::string const &File, FileFd &Fd);
+
+APT_HIDDEN int Inhibit(const char *what, const char *who, const char *why, const char *mode);
+
+#endif