bin/sh/var.c

77 	int flags;
145 static void setvareq_const(const char *s, int flags);
169 		vp->flags = ip->flags | VSTRFIXED | VTEXTFIXED;
179 		vps1.flags = VSTRFIXED|VTEXTFIXED;
196 setvarsafe(const char *name, const char *val, int flags)
208 		setvar(name, val, flags);
216  * Set the value of a variable.  The flags argument is stored with the
217  * flags of the variable.  If val is NULL, the variable is unset.
221 setvar(const char *name, const char *val, int flags)
248 		flags |= VUNSET;
262 	setvareq(nameeq, flags);
319 setvareq(char *s, int flags)
325 		flags |= VEXPORT;
326 	if (forcelocal && !(flags & (VNOSET | VNOLOCAL)))
330 		if (vp->flags & VREADONLY) {
331 			if ((flags & (VTEXTFIXED|VSTACK)) == 0)
335 		if (flags & VNOSET) {
336 			if ((flags & (VTEXTFIXED|VSTACK)) == 0)
342 		if (vp->func && (flags & VNOFUNC) == 0)
345 		if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
348 		vp->flags &= ~(VTEXTFIXED|VSTACK|VUNSET);
349 		vp->flags |= flags;
363 		if ((vp->flags & VEXPORT) && localevar(s)) {
372 	if (flags & VNOSET) {
373 		if ((flags & (VTEXTFIXED|VSTACK)) == 0)
379 	vp->flags = flags;
385 	if ((vp->flags & VEXPORT) && localevar(s)) {
395 setvareq_const(const char *s, int flags)
397 	setvareq(__DECONST(char *, s), flags | VTEXTFIXED);
406 listsetvar(struct arglist *list, int flags)
412 		setvareq(savestr(list->args[i]), flags);
428 	if (v == NULL || v->flags & VUNSET)
457 	if (v == NULL || v->flags & VUNSET ||
458 	    (!doall && (v->flags & VEXPORT) == 0))
556 			if (vp->flags & VEXPORT)
562 			if (vp->flags & VEXPORT)
606 			if (!(vp->flags & VUNSET))
616 			if (!(vp->flags & VUNSET))
678 					vp->flags |= flag;
679 					if ((vp->flags & VEXPORT) && localevar(vp->text)) {
692 				if (vp->flags & flag) {
704 					if (values && !(vp->flags & VUNSET)) {
742  * value and flags are saved in a localvar structure.  The saved values
769 			lvp->flags = VUNSET;
772 			lvp->flags = vp->flags;
773 			vp->flags |= VSTRFIXED|VTEXTFIXED;
804 		} else if ((lvp->flags & (VUNSET|VSTRFIXED)) == VUNSET) {
805 			vp->flags &= ~VREADONLY;
808 			islocalevar = (vp->flags | lvp->flags) & VEXPORT &&
810 			if ((vp->flags & VTEXTFIXED) == 0)
812 			vp->flags = lvp->flags;
817 				change_env(vp->text, vp->flags & VEXPORT &&
818 				    (vp->flags & VUNSET) == 0);
890 	if (vp->flags & VREADONLY)
894 	if ((vp->flags & VEXPORT) && localevar(vp->text)) {
899 	vp->flags &= ~VEXPORT;
900 	vp->flags |= VUNSET;
901 	if ((vp->flags & VSTRFIXED) == 0) {
902 		if ((vp->flags & VTEXTFIXED) == 0)