* apt-pkg/contrib/fileutl.cc:

  - Add a FileFd::FileSize() method to get the size of the underlying
    file and not the size of the content in the file as FileFd::Size()
    does - the sizes can differ since the direct gzip integration
* methods/{gzip,bzip2}.cc:
  - use FileSize() to determine if the file is invalid (Closes: #600852)

2 files changed, 13 insertions, 6 deletions

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index cbf1d64a9..f4ab066d7 100644
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -910,18 +910,24 @@ unsigned long FileFd::Tell()
    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;
-   unsigned long size;
-   off_t orig_pos;
 
    if (fstat(iFd,&Buf) != 0)
       return _error->Errno("fstat","Unable to determine the file size");
-   size = Buf.st_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
@@ -931,7 +937,7 @@ 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 */
-       orig_pos = lseek(iFd, 0, SEEK_CUR);
+       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)
diff --git a/apt-pkg/contrib/fileutl.h b/apt-pkg/contrib/fileutl.h
index 419506273..1380f06b4 100644
--- a/apt-pkg/contrib/fileutl.h
+++ b/apt-pkg/contrib/fileutl.h
@@ -63,6 +63,7 @@ class FileFd
    bool Truncate(unsigned long To);
    unsigned long Tell();
    unsigned long Size();
+   unsigned long FileSize();
    bool Open(string FileName,OpenMode Mode,unsigned long Perms = 0666);
    bool OpenDescriptor(int Fd, OpenMode Mode, bool AutoClose=false);
    bool Close();