* apt-pkg/contrib/mmap.cc:

[apt.git] / apt-pkg / contrib / fileutl.cc

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 62d42e4da8abe8e84a6706273e13a9da6fac22df..52f517ee07784ca2578e445b3041a8679a48ef1e 100644 (file)
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -11,6 +11,7 @@
    Most of this source is placed in the Public Domain, do with it what 
    you will
    It was originally written by Jason Gunthorpe <jgg@debian.org>.
    Most of this source is placed in the Public Domain, do with it what 
    you will
    It was originally written by Jason Gunthorpe <jgg@debian.org>.

+   FileFd gzip support added by Martin Pitt <martin.pitt@canonical.com>

    
    The exception is RunScripts() it is under the GPLv2
 
    
    The exception is RunScripts() it is under the GPLv2
 


@@ -190,7 +191,7 @@ int GetLock(string File,bool Errors)
                                                                        /*}}}*/
 // FileExists - Check if a file exists                                 /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // FileExists - Check if a file exists                                 /*{{{*/
 // ---------------------------------------------------------------------

-/* */
+/* Beware: Directories are also files! */

 bool FileExists(string File)
 {
    struct stat Buf;
 bool FileExists(string File)
 {
    struct stat Buf;


@@ -199,6 +200,17 @@ bool FileExists(string File)
    return true;
 }
                                                                        /*}}}*/
    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     /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // DirectoryExists - Check if a directory exists and is really one     /*{{{*/
 // ---------------------------------------------------------------------
 /* */


@@ -250,6 +262,27 @@ bool CreateDirectory(string const &Parent, string const &Path)
    return true;
 }
                                                                        /*}}}*/
    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
 // GetListOfFilesInDir - returns a vector of files in the given dir    /*{{{*/
 // ---------------------------------------------------------------------
 /* If an extension is given only files with this extension are included


@@ -282,6 +315,13 @@ std::vector<string> GetListOfFilesInDir(string const &Dir, std::vector<string> c
    }
 
    std::vector<string> List;
    }
 
    std::vector<string> 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) 
    Configuration::MatchAgainstConfig SilentIgnore("Dir::Ignore-Files-Silently");
    DIR *D = opendir(Dir.c_str());
    if (D == 0) 


@@ -296,6 +336,20 @@ std::vector<string> GetListOfFilesInDir(string const &Dir, std::vector<string> c
       if (Ent->d_name[0] == '.')
         continue;
 
       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 (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
       // check for accepted extension:
       // no extension given -> periods are bad as hell!
       // extensions given -> "" extension allows no extension


@@ -308,7 +362,8 @@ std::vector<string> GetListOfFilesInDir(string const &Dir, std::vector<string> c
            {
               if (Debug == true)
                  std::clog << "Bad file: " << Ent->d_name << " → no extension" << std::endl;
            {
               if (Debug == true)
                  std::clog << "Bad file: " << Ent->d_name << " → no extension" << std::endl;

-              _error->Notice("Ignoring file '%s' in directory '%s' as it has no filename extension", Ent->d_name, Dir.c_str());
+              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;
            }
         }
               continue;
            }
         }


@@ -317,7 +372,7 @@ std::vector<string> GetListOfFilesInDir(string const &Dir, std::vector<string> c
            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)
            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());
+              _error->Notice(_("Ignoring file '%s' in directory '%s' as it has an invalid filename extension"), Ent->d_name, Dir.c_str());

            continue;
         }
       }
            continue;
         }
       }


@@ -350,16 +405,6 @@ std::vector<string> GetListOfFilesInDir(string const &Dir, std::vector<string> c
         continue;
       }
 
         continue;
       }
 

-      // Make sure it is a file and not something else
-      string const File = flCombine(Dir,Ent->d_name);
-      struct stat St;
-      if (stat(File.c_str(),&St) != 0 || S_ISREG(St.st_mode) == 0)
-      {
-        if (Debug == true)
-           std::clog << "Bad file: " << Ent->d_name << " → stat says not a good file" << std::endl;
-        continue;
-      }
-

       if (Debug == true)
         std::clog << "Accept file: " << Ent->d_name << " in " << Dir << std::endl;
       List.push_back(File);
       if (Debug == true)
         std::clog << "Accept file: " << Ent->d_name << " in " << Dir << std::endl;
       List.push_back(File);


@@ -656,8 +701,19 @@ bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms)
       case ReadOnly:
       iFd = open(FileName.c_str(),O_RDONLY);
       break;
       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 WriteEmpty:
+      case WriteAtomic:

       {
         Flags |= Replace;
         char *name = strdup((FileName + ".XXXXXX").c_str());
       {
         Flags |= Replace;
         char *name = strdup((FileName + ".XXXXXX").c_str());


@@ -666,6 +722,15 @@ bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms)
         free(name);
         break;
       }
         free(name);
         break;
       }

+
+      case WriteEmpty:
+      {
+        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;
+      }

       
       case WriteExists:
       iFd = open(FileName.c_str(),O_RDWR);
       
       case WriteExists:
       iFd = open(FileName.c_str(),O_RDWR);


@@ -688,6 +753,24 @@ bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms)
    SetCloseExec(iFd,true);
    return true;
 }
    SetCloseExec(iFd,true);
    return true;
 }

+
+bool FileFd::OpenDescriptor(int Fd, OpenMode Mode, 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);
+      }
+   }
+   this->FileName = "";
+   return true;
+}

                                                                        /*}}}*/
 // FileFd::~File - Closes the file                                     /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // FileFd::~File - Closes the file                                     /*{{{*/
 // ---------------------------------------------------------------------


@@ -711,7 +794,10 @@ bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual)
    
    do
    {
    
    do
    {

-      Res = read(iFd,To,Size);
+      if (gz != NULL)
+         Res = gzread(gz,To,Size);
+      else
+         Res = read(iFd,To,Size);

       if (Res < 0 && errno == EINTR)
         continue;
       if (Res < 0)
       if (Res < 0 && errno == EINTR)
         continue;
       if (Res < 0)


@@ -750,7 +836,10 @@ bool FileFd::Write(const void *From,unsigned long Size)
    errno = 0;
    do
    {
    errno = 0;
    do
    {

-      Res = write(iFd,From,Size);
+      if (gz != NULL)
+         Res = gzwrite(gz,From,Size);
+      else
+         Res = write(iFd,From,Size);

       if (Res < 0 && errno == EINTR)
         continue;
       if (Res < 0)
       if (Res < 0 && errno == EINTR)
         continue;
       if (Res < 0)


@@ -776,7 +865,12 @@ bool FileFd::Write(const void *From,unsigned long Size)
 /* */
 bool FileFd::Seek(unsigned long To)
 {
 /* */
 bool FileFd::Seek(unsigned long To)
 {

-   if (lseek(iFd,To,SEEK_SET) != (signed)To)
+   int res;
+   if (gz)
+      res = gzseek(gz,To,SEEK_SET);
+   else
+      res = lseek(iFd,To,SEEK_SET);
+   if (res != (signed)To)

    {
       Flags |= Fail;
       return _error->Error("Unable to seek to %lu",To);
    {
       Flags |= Fail;
       return _error->Error("Unable to seek to %lu",To);


@@ -790,7 +884,12 @@ bool FileFd::Seek(unsigned long To)
 /* */
 bool FileFd::Skip(unsigned long Over)
 {
 /* */
 bool FileFd::Skip(unsigned long Over)
 {

-   if (lseek(iFd,Over,SEEK_CUR) < 0)
+   int res;
+   if (gz)
+      res = gzseek(gz,Over,SEEK_CUR);
+   else
+      res = lseek(iFd,Over,SEEK_CUR);
+   if (res < 0)

    {
       Flags |= Fail;
       return _error->Error("Unable to seek ahead %lu",Over);
    {
       Flags |= Fail;
       return _error->Error("Unable to seek ahead %lu",Over);


@@ -804,6 +903,11 @@ bool FileFd::Skip(unsigned long Over)
 /* */
 bool FileFd::Truncate(unsigned long To)
 {
 /* */
 bool FileFd::Truncate(unsigned long To)
 {

+   if (gz)
+   {
+      Flags |= Fail;
+      return _error->Error("Truncating gzipped files is not implemented (%s)", FileName.c_str());
+   }

    if (ftruncate(iFd,To) != 0)
    {
       Flags |= Fail;
    if (ftruncate(iFd,To) != 0)
    {
       Flags |= Fail;


@@ -818,23 +922,58 @@ bool FileFd::Truncate(unsigned long To)
 /* */
 unsigned long FileFd::Tell()
 {
 /* */
 unsigned long FileFd::Tell()
 {

-   off_t Res = lseek(iFd,0,SEEK_CUR);
+   off_t Res;
+   if (gz)
+     Res = gztell(gz);
+   else
+     Res = lseek(iFd,0,SEEK_CUR);

    if (Res == (off_t)-1)
       _error->Errno("lseek","Failed to determine the current file position");
    return Res;
 }
                                                                        /*}}}*/
    if (Res == (off_t)-1)
       _error->Errno("lseek","Failed to determine the current file position");
    return Res;
 }
                                                                        /*}}}*/

-// FileFd::Size - Return the size of the file                          /*{{{*/
+// FileFd::FileSize - Return the size of the file                      /*{{{*/

 // ---------------------------------------------------------------------
 /* */
 // ---------------------------------------------------------------------
 /* */

-unsigned long FileFd::Size()
+unsigned long FileFd::FileSize()

 {
    struct stat Buf;
 {
    struct stat Buf;

+

    if (fstat(iFd,&Buf) != 0)
       return _error->Errno("fstat","Unable to determine the file size");
    return Buf.st_size;
 }
                                                                        /*}}}*/
    if (fstat(iFd,&Buf) != 0)
       return _error->Errno("fstat","Unable to determine the file size");
    return Buf.st_size;
 }
                                                                        /*}}}*/

+// FileFd::Size - Return the size of the content in the file           /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+unsigned long FileFd::Size()
+{
+   unsigned 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
+   // gzopen in "direct" mode as well
+   if (gz && !gzdirect(gz) && size > 0)
+   {
+       /* 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 */
+       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");
+       if (read(iFd, &size, 4) != 4)
+          return _error->Errno("read","Unable to read original size of gzipped file");
+       size &= 0xFFFFFFFF;
+
+       if (lseek(iFd, orig_pos, SEEK_SET) < 0)
+          return _error->Errno("lseek","Unable to seek in gzipped file");
+       return size;
+   }
+
+   return size;
+}
+                                                                       /*}}}*/

 // FileFd::Close - Close the file if the close flag is set             /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // FileFd::Close - Close the file if the close flag is set             /*{{{*/
 // ---------------------------------------------------------------------
 /* */


@@ -842,20 +981,31 @@ bool FileFd::Close()
 {
    bool Res = true;
    if ((Flags & AutoClose) == AutoClose)
 {
    bool Res = true;
    if ((Flags & AutoClose) == AutoClose)

-      if (iFd >= 0 && close(iFd) != 0)
-        Res &= _error->Errno("close",_("Problem closing the file"));
-   iFd = -1;
+   {
+      if (gz != NULL) {
+        int const e = gzclose(gz);
+        // gzdopen() 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
+        if (iFd > 0 && close(iFd) != 0)
+           Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str());
+   }

 
 

-   if ((Flags & Replace) == Replace) {
+   if ((Flags & Replace) == Replace && iFd >= 0) {

       if (rename(TemporaryFileName.c_str(), FileName.c_str()) != 0)
       if (rename(TemporaryFileName.c_str(), FileName.c_str()) != 0)

-        Res &= _error->Errno("rename",_("Problem renaming the file"));
+        Res &= _error->Errno("rename",_("Problem renaming the file %s to %s"), TemporaryFileName.c_str(), FileName.c_str());
+

       FileName = TemporaryFileName; // for the unlink() below.
    }
       FileName = TemporaryFileName; // for the unlink() below.
    }

-           
+
+   iFd = -1;
+   gz = NULL;
+

    if ((Flags & Fail) == Fail && (Flags & DelOnFail) == DelOnFail &&
        FileName.empty() == false)
       if (unlink(FileName.c_str()) != 0)
    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());

 
 
    return Res;
 
 
    return Res;