nativelibc/statfs.c

/*	A part of the Native C Library for Windows NT
	Copyright 2015-2016 Rivoreo

	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 <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

int fstatfs(int fd, struct statfs *buffer) {
	if(!buffer) {
		errno = EFAULT;
		return -1;
	}

	struct statvfs st;
	if(fstatvfs(fd, &st) < 0) return -1;
	buffer->f_bsize = st.f_frsize;
	buffer->f_blocks = st.f_blocks;
	buffer->f_bfree = st.f_bfree;
	buffer->f_bavail = st.f_bavail;
	strncpy(buffer->f_mntfromname, st.f_mntfromname, MNAMELEN);

	return 0;
}

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

	int fd = open(path, O_RDONLY);
	if(fd == -1) return -1;

	int r = fstatfs(fd, buffer);
	int e = errno;
	close(fd);
	errno = e;
	return r;
}