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/*****************************************************************************/
/* */
/* opendir.h */
/* */
/* Open a directory */
/* */
/* */
/* */
/* (C) 2005 Oliver Schmidt, <ol.sc@web.de> */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include "dir.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
extern char _cwd[FILENAME_MAX];
/*****************************************************************************/
/* Code */
/*****************************************************************************/
DIR* __fastcall__ opendir (register const char* name)
{
register DIR* dir;
/* Alloc DIR */
if ((dir = malloc (sizeof (*dir))) == NULL) {
/* May not have been done by malloc() */
_directerrno (ENOMEM);
/* Return failure */
return NULL;
}
/* Interpret dot as current working directory */
if (*name == '.') {
name = _cwd;
}
/* Open directory file */
if ((dir->fd = open (name, O_RDONLY)) != -1) {
/* Read directory key block */
if (read (dir->fd,
dir->block.bytes,
sizeof (dir->block)) == sizeof (dir->block)) {
/* Get directory entry infos from directory header */
dir->entry_length = dir->block.bytes[0x23];
dir->entries_per_block = dir->block.bytes[0x24];
/* Skip directory header entry */
dir->current_entry = 1;
/* Return success */
return dir;
}
/* EOF: Most probably no directory file at all */
if (_oserror == 0) {
_directerrno (EINVAL);
}
/* Cleanup directory file */
close (dir->fd);
}
/* Cleanup DIR */
free (dir);
/* Return failure */
return NULL;
}
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