lfs_truncate
int lfs_truncate(struct vnode *, off_t, int, kauth_cred_t);
(void) lfs_truncate(ovp, osize,
(void) lfs_truncate(ovp, osize,
error = lfs_truncate(tvp, (off_t)0, IO_SYNC, cred);
lfs_truncate(vp, (off_t)0, 0, NOCRED);
lfs_truncate(vp, lfs_dino_getsize(fs, dip), 0,
lfs_truncate(ivp, ivp->v_size + (noff << lfs_sb_getbshift(fs)), 0,
error = lfs_truncate(vp, (off_t)0, 0, NOCRED);
(void) lfs_truncate(dvp, (off_t)ulr->ulr_endoff, IO_SYNC, cr);
(void) lfs_truncate(vp, osize, ioflag & IO_SYNC, cred);
error = lfs_truncate(vp, vap->va_size, 0, cred);
error = lfs_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred);