posix/lib/psxdll/dirent/opendir.c

   1 /* $Id: opendir.c,v 1.2 2002/02/20 09:17:56 hyperion Exp $
   2  */
   3 /*
   4  * COPYRIGHT:   See COPYING in the top level directory
   5  * PROJECT:     ReactOS POSIX+ Subsystem
   6  * FILE:        subsys/psx/lib/psxdll/dirent/opendir.c
   7  * PURPOSE:     Open a directory
   8  * PROGRAMMER:  KJK::Hyperion <noog@libero.it>
   9  * UPDATE HISTORY:
  10  *              27/01/2002: Created
  11  *              13/02/2002: KJK::Hyperion: modified to use file descriptors
  12  */
  13
  14 #include <sys/types.h>
  15 #include <fcntl.h>
  16 #include <dirent.h>
  17 #include <wchar.h>
  18 #include <errno.h>
  19 #include <psx/debug.h>
  20 #include <psx/stdlib.h>
  21 #include <psx/dirent.h>
  22 #include <psx/safeobj.h>
  23
  24 DIR *opendir(const char *dirname)
  25 {
  26  ANSI_STRING    strDirName;
  27  UNICODE_STRING wstrDirName;
  28  DIR           *pdData;
  29
  30  RtlInitAnsiString(&strDirName, (PCSZ)dirname);
  31  RtlAnsiStringToUnicodeString(&wstrDirName, &strDirName, TRUE);
  32
  33  pdData = (DIR *)_Wopendir(wstrDirName.Buffer);
  34
  35  RtlFreeUnicodeString(&wstrDirName);
  36
  37  return (pdData);
  38
  39 }
  40
  41 DIR *_Wopendir(const wchar_t *dirname)
  42 {
  43  struct __internal_DIR *pidData;
  44  int                    nFileNo;
  45
  46  /* allocate internal object */
  47  pidData = __malloc(sizeof(*pidData));
  48
  49  /* allocation failed */
  50  if(pidData == 0)
  51  {
  52   errno = ENOMEM;
  53   return (0);
  54  }
  55
  56  /* open the directory */
  57  nFileNo = _Wopen(dirname, O_RDONLY | _O_DIRFILE);
  58
  59  /* failure */
  60  if(nFileNo < 0)
  61  {
  62   __free(pidData);
  63   return (0);
  64  }
  65
  66  /* directory file descriptors must be closed on exec() */
  67  if(fcntl(nFileNo, F_SETFD, FD_CLOEXEC) == -1)
  68   WARN
  69   (
  70    "couldn't set FD_CLOEXEC flag on file number %u, errno %u",
  71    nFileNo,
  72    errno
  73   );
  74
  75  /* associate the internal data to the file descriptor */
  76  if(fcntl(nFileNo, F_SETXP, pidData) == -1)
  77   WARN
  78   (
  79    "couldn't associate the object at 0x%X to the file number %u, errno %u",
  80    pidData,
  81    nFileNo,
  82    errno
  83   );
  84
  85  if(fcntl(nFileNo, F_SETXS, sizeof(*pidData)) == -1)
  86   WARN
  87   (
  88    "couldn't set the extra data size of the file number %u, errno %u",
  89    nFileNo,
  90    errno
  91   );
  92
  93  pidData->signature = __IDIR_MAGIC;
  94
  95  /* success */
  96  return ((DIR *)pidData);
  97 }
  98
  99 /* EOF */
 100