nativelibc/time/utimes.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 <sys/time.h>
#include <windows.h>
#include <nt.h>
#include <errno.h>
#include <pathname.h>

int utimes(const char *filename, const struct timeval *times) {
	if(!filename) {
		errno = EFAULT;
		return -1;
	}
	if(!*filename) {
		errno = ENOENT;
		return -1;
	}

	if(*filename != '/') {
		errno = ENOSYS;
		return -1;
	}

	FILE_BASIC_INFORMATION fbi;
	memset(&fbi, 0, sizeof fbi);
	if(times) {
		__timeval_to_hurdred_nanoseconds_since_1601(times, &fbi.LastAccessTime);
		__timeval_to_hurdred_nanoseconds_since_1601(times + 1, &fbi.LastWriteTime);
	} else {
		long int status = NtQuerySystemTime(&fbi.LastAccessTime);
		if(status < 0) {
			__set_errno_from_ntstatus(status);
			return -1;
		}
		fbi.LastWriteTime = fbi.LastAccessTime;
	}

	void *handle;
	IO_STATUS_BLOCK io_status;
	unsigned long int file_access = GENERIC_WRITE | SYNCHRONIZE;
	unsigned long int file_share = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
	unsigned long int options = FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_FOR_BACKUP_INTENT;
	UNICODE_STRING name1;
	if(!RtlCreateUnicodeStringFromAsciiz(&name1, filename)) {
		errno = ENOMEM;
		return -1;
	}
	PATHNAME_UNIX2NT_UTF16_STRUCT(name1);
	OBJECT_ATTRIBUTES object_attrib = { sizeof(OBJECT_ATTRIBUTES), NULL, &name1, 0, NULL, NULL };
	long int status = NtOpenFile(&handle, file_access, &object_attrib, &io_status, file_share, options);
	RtlFreeUnicodeString(&name1);
	if(status < 0) {
		__set_errno_from_ntstatus(status);
		return -1;
	}
	status = NtSetInformationFile(handle, &io_status, &fbi, sizeof fbi, FileBasicInformation);
	if(status < 0) {
		__set_errno_from_ntstatus(status);
		return -1;
	}
	return __set_errno_from_ntstatus(NtClose(handle)) ? -1 : 0;
}