common/sh/subshell.c

58 static struct subshell
61 	struct subshell	*prev;	/* previous subshell data */
62 	struct subshell	*pipe;	/* subshell where output goes to pipe on fork */
63 	Dt_t		*var;	/* variable table at time of subshell */
65 	Dt_t		*sfun;	/* function scope for subshell */
66 	Dt_t		*salias;/* alias scope for subshell */
106 	register struct subshell *sp = subshell_data->pipe;
183  * This routine creates a temp file if necessary and creates a subshell.
189 	register struct subshell *sp = subshell_data;
213 		/* setting subpid to 1 causes subshell to exit when reached */
219 		shp->subshell = 0;
228 	register struct subshell	*sp;
230 	for(sp = (struct subshell*)subshell_data; sp; sp=sp->prev)
250 	register struct subshell *sp = (struct subshell*)subshell_data;
267 		if(mp || !np->nvfun || np->nvfun->subshell>=sh.subshell)
311 	save = shp->subshell;
312 	shp->subshell = 0;
315 	shp->subshell = save;
322 static void nv_restore(struct subshell *sp)
381  * create new one if in a subshell and one doesn't exist and create is non-zero
385 	register struct subshell *sp = subshell_data;
399  * create new one if in a subshell and one doesn't exist and create is non-zero
403 	register struct subshell *sp = subshell_data;
436 	register struct subshell *sp = subshell_data;
448 	register struct subshell *sp = subshell_data;
472 	struct subshell sub_data;
473 	register struct subshell *sp = &sub_data;
477 	int16_t subshell;
495 	subshell = shp->subshell+1;
496 	SH_SUBSHELLNOD->nvalue.s = subshell;
497 	shp->subshell = subshell;
575 	if(comsub!=2 && jmpval!=SH_JMPSUB && shp->st.trapcom[0] && shp->subshell)
585 	if(shp->subshell==0)	/* must be child process */
721 	if(shp->subshell)
722 		SH_SUBSHELLNOD->nvalue.s = --shp->subshell;
723 	subshell = shp->subshell;