src/kits/package/hpkg/AttributeDataReader.cpp

   1 /*
   2  * Copyright 2009-2011, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include <package/hpkg/DataReader.h>
   8
   9 #include <errno.h>
  10
  11 #include <fs_attr.h>
  12
  13
  14 namespace BPackageKit {
  15
  16 namespace BHPKG {
  17
  18
  19 BAttributeDataReader::BAttributeDataReader(int fd, const char* attribute,
  20         uint32 type)
  21         :
  22         fFD(fd),
  23         fType(type),
  24         fAttribute(attribute)
  25 {
  26 }
  27
  28
  29 status_t
  30 BAttributeDataReader::ReadData(off_t offset, void* buffer, size_t size)
  31 {
  32         ssize_t bytesRead = fs_read_attr(fFD, fAttribute, fType, offset, buffer,
  33                 size);
  34         if (bytesRead < 0)
  35                 return errno;
  36         return (size_t)bytesRead == size ? B_OK : B_ERROR;
  37 }
  38
  39
  40 }       // namespace BHPKG
  41
  42 }       // namespace BPackageKit