reactos/posix/lib/psxdll/dirent/opendir.c
2002-10-29 04:45:58 +00:00

101 lines
2 KiB
C

/* $Id: opendir.c,v 1.4 2002/10/29 04:45:28 rex Exp $
*/
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS POSIX+ Subsystem
* FILE: subsys/psx/lib/psxdll/dirent/opendir.c
* PURPOSE: Open a directory
* PROGRAMMER: KJK::Hyperion <noog@libero.it>
* UPDATE HISTORY:
* 27/01/2002: Created
* 13/02/2002: KJK::Hyperion: modified to use file descriptors
*/
#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <wchar.h>
#include <errno.h>
#include <psx/debug.h>
#include <psx/stdlib.h>
#include <psx/dirent.h>
#include <psx/safeobj.h>
DIR *opendir(const char *dirname)
{
ANSI_STRING strDirName;
UNICODE_STRING wstrDirName;
DIR *pdData;
RtlInitAnsiString(&strDirName, (PCSZ)dirname);
RtlAnsiStringToUnicodeString(&wstrDirName, &strDirName, TRUE);
pdData = (DIR *)_Wopendir(wstrDirName.Buffer);
RtlFreeUnicodeString(&wstrDirName);
return (pdData);
}
DIR *_Wopendir(const wchar_t *dirname)
{
struct __internal_DIR *pidData;
int nFileNo;
/* allocate internal object */
pidData = __malloc(sizeof(*pidData));
/* allocation failed */
if(pidData == 0)
{
errno = ENOMEM;
return (0);
}
/* open the directory */
nFileNo = _Wopen(dirname, O_RDONLY | _O_DIRFILE);
/* failure */
if(nFileNo < 0)
{
__free(pidData);
return (0);
}
/* directory file descriptors must be closed on exec() */
if(fcntl(nFileNo, F_SETFD, FD_CLOEXEC) == -1)
WARN
(
"couldn't set FD_CLOEXEC flag on file number %u, errno %u",
nFileNo,
errno
);
/* associate the internal data to the file descriptor */
if(fcntl(nFileNo, F_SETXP, pidData) == -1)
WARN
(
"couldn't associate the object at 0x%X to the file number %u, errno %u",
pidData,
nFileNo,
errno
);
if(fcntl(nFileNo, F_SETXS, sizeof(*pidData)) == -1)
WARN
(
"couldn't set the extra data size of the file number %u, errno %u",
nFileNo,
errno
);
pidData->signature = __IDIR_MAGIC;
/* success */
return ((DIR *)pidData);
}
/* EOF */