mountfs
if (mountfs(fs->fs_vfstype, fs->fs_spec,
rval = mountfs(mntbuf->f_fstypename, mntfromname,
rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
rval = mountfs(vfstype,
int mountfs(const char *, const char *, const char *,