#include <fuse.h>
#include <errno.h>
#include <string.h>

int lfs_getattr( const char *, struct stat * );
int lfs_readdir( const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info * );
int lfs_open( const char *, struct fuse_file_info * );
int lfs_read( const char *, char *, size_t, off_t, struct fuse_file_info * );

static struct fuse_operations lfs_oper = {
	.getattr	= lfs_getattr,
	.readdir	= lfs_readdir,
	.mknod = NULL,
	.mkdir = NULL,
	.unlink = NULL,
	.rmdir = NULL,
	.truncate = NULL,
	.open	= lfs_open,
	.read	= lfs_read,
	.write = NULL,
	.rename = NULL,
	.utime = NULL
};

int lfs_getattr( const char *path, struct stat *stbuf ) {
	int res = 0;

	memset(stbuf, 0, sizeof(struct stat));
	if( strcmp( path, "/" ) == 0 ) {
		stbuf->st_mode = S_IFDIR | 0755;
		stbuf->st_nlink = 2;
	} else if( strcmp( path, "/hello" ) == 0 ) {
		stbuf->st_mode = S_IFREG | 0444;
		stbuf->st_nlink = 1;
		stbuf->st_size = 12;
	} else
		res = -ENOENT;

	return res;
}

int lfs_readdir( const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi ) {
	(void) offset;
	(void) fi;

	if(strcmp(path, "/") != 0)
		return -ENOENT;

	filler(buf, ".", NULL, 0);
	filler(buf, "..", NULL, 0);
	filler(buf, "hello", NULL, 0);

	return 0;
}

int lfs_open( const char *path, struct fuse_file_info *fi ) {
	return 0;
}

int lfs_read( const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi ) {
	memcpy( buf, "Hello World\n", size );

	return 12;
}

int main( int argc, char *argv[] ) {
	fuse_main( argc, argv, &lfs_oper );

	return 0;
}