statfs.c

/*	A part of the Windows CE C Extra Library (celibc)
	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/statfs.h>
#include <windows.h>
#include <errno.h>

int statfs(const char *path, struct statfs *buffer) {
	if(!path || !buffer) {
		errno = EFAULT;
		return -1;
	}

	ULARGE_INTEGER available, total;
	size_t len = strlen(path) + 1;
	wchar_t wpath[len];
	if((int)mbstowcs(wpath, path, len) < 0) return -1;
	if(!GetDiskFreeSpaceExW(wpath, &available, &total, NULL)) return -1;

	buffer->f_bsize = 512;		// XXX
	buffer->f_blocks = total.QuadPart / buffer->f_bsize;
	buffer->f_bfree = available.QuadPart / buffer->f_bsize;
	return 0;
}