Fix incorrect comparison between signed/unsigned

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

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index c9d419fc4b9cfe99e0f76f71612e9e1d306d58ee..1ba4674e583194155be2477097188fff8775e19f 100644 (file)
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -58,13 +58,10 @@
        #include <bzlib.h>
 #endif
 #ifdef HAVE_LZMA
-       #include <stdint.h>
        #include <lzma.h>
 #endif
-
-#ifdef WORDS_BIGENDIAN
-#include <inttypes.h>
-#endif
+#include <endian.h>
+#include <stdint.h>
 
 #include <apti18n.h>
                                                                        /*}}}*/
@@ -1244,7 +1241,8 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
         if (d->lzma == NULL)
            d->lzma = new FileFdPrivate::LZMAFILE;
         d->lzma->file = (FILE*) compress_struct;
-        d->lzma->stream = LZMA_STREAM_INIT;
+         lzma_stream tmp_stream = LZMA_STREAM_INIT;
+        d->lzma->stream = tmp_stream;
 
         if ((Mode & ReadWrite) == ReadWrite)
            return FileFdError("ReadWrite mode is not supported for file %s", FileName.c_str());
@@ -1360,7 +1358,10 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
         Args.push_back(a->c_str());
       if (Comp == false && FileName.empty() == false)
       {
-        Args.push_back("--stdout");
+        // commands not needing arguments, do not need to be told about using standard output
+        // in reality, only testcases with tools like cat, rev, rot13, … are able to trigger this
+        if (compressor.CompressArgs.empty() == false && compressor.UncompressArgs.empty() == false)
+           Args.push_back("--stdout");
         if (TemporaryFileName.empty() == false)
            Args.push_back(TemporaryFileName.c_str());
         else
@@ -1653,6 +1654,8 @@ bool FileFd::Write(int Fd, const void *From, unsigned long long Size)
 /* */
 bool FileFd::Seek(unsigned long long To)
 {
+   Flags &= ~HitEof;
+
    if (d != NULL && (d->pipe == true || d->InternalStream() == true))
    {
       // Our poor man seeking in pipes is costly, so try to avoid it
@@ -1795,7 +1798,8 @@ static bool StatFileFd(char const * const msg, int const iFd, std::string const
         // higher-level code will generate more meaningful messages,
         // even translated this would be meaningless for users
         return _error->Errno("fstat", "Unable to determine %s for fd %i", msg, iFd);
-      ispipe = S_ISFIFO(Buf.st_mode);
+      if (FileName.empty() == false)
+        ispipe = S_ISFIFO(Buf.st_mode);
    }
 
    // for compressor pipes st_size is undefined and at 'best' zero
@@ -1875,19 +1879,13 @@ unsigned long long FileFd::Size()
          FileFdErrno("lseek","Unable to seek to end of gzipped file");
          return 0;
        }
-       size = 0;
+       uint32_t size = 0;
        if (read(iFd, &size, 4) != 4)
        {
          FileFdErrno("read","Unable to read original size of gzipped file");
          return 0;
        }
-
-#ifdef WORDS_BIGENDIAN
-       uint32_t tmp_size = size;
-       uint8_t const * const p = (uint8_t const * const) &tmp_size;
-       tmp_size = (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0];
-       size = tmp_size;
-#endif
+       size = le32toh(size);
 
        if (lseek(iFd, oldPos, SEEK_SET) < 0)
        {