posix/lib/psxdll/unistd/read.c

   1 /* $Id:
   2  */
   3 /*
   4  * COPYRIGHT:   See COPYING in the top level directory
   5  * PROJECT:     ReactOS POSIX+ Subsystem
   6  * FILE:        subsys/psx/lib/psxdll/unistd/read.c
   7  * PURPOSE:     Read from a file
   8  * PROGRAMMER:  KJK::Hyperion <noog@libero.it>
   9  * UPDATE HISTORY:
  10  *              15/02/2002: Created
  11  */
  12
  13 #include <ddk/ntddk.h>
  14 #include <unistd.h>
  15 #include <sys/types.h>
  16
  17 ssize_t read(int fildes, void *buf, size_t nbyte)
  18 {
  19 }
  20
  21 ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset)
  22 {
  23  HANDLE          hFile;
  24  NTSTATUS        nErrCode;
  25  IO_STATUS_BLOCK isbStatus;
  26
  27  /* get the file handle for the specified file descriptor */
  28  if(fcntl(fildes, F_GETFH, &hFile) == -1)
  29   return (-1);
  30
  31  /* read data from file */
  32  nErrCode = NtReadFile
  33  (
  34   hFile,
  35   NULL,
  36   NULL,
  37   NULL,
  38   &isbStatus,
  39   buf,
  40   nbyte,
  41   (PLARGE_INTEGER)&off_t,
  42   NULL
  43  );
  44
  45  return ((ssize_t)isbStatus.Information);
  46 }
  47
  48 /* EOF */
  49