posix/lib/psxdll/unistd/access.c

   1 /* $Id: access.c,v 1.3 2002/10/29 04:45:46 rex Exp $
   2  */
   3 /*
   4  * COPYRIGHT:   See COPYING in the top level directory
   5  * PROJECT:     ReactOS POSIX+ Subsystem
   6  * FILE:        subsys/psx/lib/psxdll/unistd/access.c
   7  * PURPOSE:     Determine accessibility of a file
   8  * PROGRAMMER:  KJK::Hyperion <noog@libero.it>
   9  * UPDATE HISTORY:
  10  *              13/02/2002: Created
  11  */
  12
  13 #include <ddk/ntddk.h>
  14 #include <unistd.h>
  15 #include <fcntl.h>
  16 #include <psx/errno.h>
  17
  18 int access(const char *path, int amode)
  19 {
  20  OBJECT_ATTRIBUTES oaFileAttribs;
  21  IO_STATUS_BLOCK isbStatus;
  22  ACCESS_MASK amDesiredAccess = 0;
  23  NTSTATUS nErrCode;
  24  HANDLE hFile;
  25
  26  if(amode != F_OK)
  27  {
  28   if(amode && R_OK) amDesiredAccess |= GENERIC_READ;
  29   if(amode && W_OK) amDesiredAccess |= GENERIC_WRITE;
  30   if(amode && X_OK) amDesiredAccess |= GENERIC_EXECUTE;
  31  }
  32
  33  nErrCode = NtCreateFile
  34  (
  35   &hFile,
  36   amDesiredAccess,
  37   &oaFileAttribs,
  38   &isbStatus,
  39   0,
  40   0,
  41   FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
  42   FILE_OPEN,
  43   0,
  44   0,
  45   0
  46  );
  47
  48  if(NT_SUCCESS(nErrCode))
  49  {
  50   NtClose(hFile);
  51   return (0);
  52  }
  53
  54  errno = __status_to_errno(nErrCode);
  55  return (-1);
  56 }
  57
  58 /* EOF */
  59