texec
texec(*av, av);
texec(dp, av);
static void texec(Char *, Char **);
struct op texec;
memset(&texec, 0, sizeof(texec));
texec.type = TEXEC;
texec.left = t; /* for tprint */
texec.str = tp->val.s;
texec.args = ap;
rv = exchild(&texec, flags, xerrok, -1);