nativelibc/mkdir.c

/*	A part of the Native C Library for Windows NT
	Copyright 2007-2015 PC GO Ld.

	This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
*/

#include <windows.h>
#include <nt.h>
#include <sys/stat.h>
#include <pathname.h>
#include <errno.h>
#include <stdio.h>
#include <ntstatus.h>
#include <string.h>

int mkdir(const char *pathname, mode_t mode) {
	if(!pathname) {
		errno = EFAULT;
		return -1;
	}
	if(!*pathname) {
		errno = ENOENT;
		return -1;
	}

	if(*pathname != '/') {
		if(strcmp(pathname, ".") == 0 || strcmp(pathname, "./") == 0) {
			errno = EEXIST;
			return -1;
		}
		errno = ENOSYS;
		return -1;
	}

	if(!pathname[1]) {
		// mkdir / ??
		errno = EEXIST;
		return -1;
	}

	UNICODE_STRING ntpathname;
	if(!RtlCreateUnicodeStringFromAsciiz(&ntpathname, pathname)) {
		errno = ENOMEM;
		return -1;
	}
	if(ntpathname.Buffer[ntpathname.Length / sizeof(wchar_t) - 1] == L'/') {
		ntpathname.Buffer[ntpathname.Length / sizeof(wchar_t) - 1] = 0;
		ntpathname.Length -= sizeof(wchar_t);
		ntpathname.MaximumLength -= sizeof(wchar_t);
	}
	PATHNAME_UNIX2NT_UTF16_STRUCT(ntpathname);
	void *handle;
	OBJECT_ATTRIBUTES object_attrib = { sizeof(OBJECT_ATTRIBUTES), NULL, &ntpathname, OBJ_PERMANENT, NULL, NULL };

	// Try to create a directory object first
	long int status = NtCreateDirectoryObject(&handle, 0, &object_attrib);
	//printf("nativelibc debug: mkdir: status = 0x%lx\n", status);
	if(status != STATUS_OBJECT_TYPE_MISMATCH) {
		RtlFreeUnicodeString(&ntpathname);
		if(status >= 0) NtClose(handle);
		return __set_errno_from_ntstatus(status) ? -1 : 0;
	}

	// Try to create a directory file in a regular file system
	unsigned long int file_access = SYNCHRONIZE;
	unsigned long int file_attrib = 0;
	unsigned long int file_share = 0;
	unsigned long int file_create_disposition = FILE_CREATE;
	unsigned long int file_create_options = FILE_DIRECTORY_FILE;
	IO_STATUS_BLOCK io_status;
	object_attrib.Attributes = 0;
	switch(mode & (S_IREAD | S_IWRITE | S_IEXEC)) {
		case 0:			// XXX
		case S_IREAD:
			file_attrib |= FILE_ATTRIBUTE_READONLY;
			break;
		case S_IWRITE:		// XXX
		case S_IREAD | S_IWRITE:
			file_attrib |= FILE_ATTRIBUTE_NORMAL;
			break;
		case S_IEXEC:
			//file_access |= FILE_TRAVERSE;
			file_attrib |= FILE_ATTRIBUTE_READONLY;		// ?
			break;
		case S_IREAD | S_IEXEC:
			//file_access |= FILE_LIST_DIRECTORY;
			file_attrib |= FILE_ATTRIBUTE_READONLY;
			break;
		case S_IREAD | S_IWRITE | S_IEXEC:
			//file_access |= FILE_LIST_DIRECTORY;
		case S_IWRITE | S_IEXEC:
			//file_access |= FILE_TRAVERSE;
			file_attrib |= FILE_ATTRIBUTE_NORMAL;
			break;
		default:
			puts(__FILE__": Unexpected code path");
			abort();
	}
	status = NtCreateFile(&handle, file_access, &object_attrib, &io_status, NULL, file_attrib, file_share, file_create_disposition, file_create_options, NULL, 0);
	//printf("nativelibc debug: mkdir: status = 0x%lx\n", status);
	RtlFreeUnicodeString(&ntpathname);
	if(status >= 0) NtClose(handle);
	return __set_errno_from_ntstatus(status) ? -1 : 0;
}