===================================================================
RCS file: /cvs/cvs/blind/parse.y,v
retrieving revision 1.18
retrieving revision 1.19
diff -u -p -r1.18 -r1.19
--- blind/parse.y	2022/04/10 21:20:24	1.18
+++ blind/parse.y	2022/04/17 21:23:34	1.19
@@ -40,6 +40,7 @@ int		yyerror(const char *, ...)
 		__attribute__((__format__ (printf, 1, 2)))
 		__attribute__((__nonnull__ (1)));
 
+int		symset(const char *, const char *, int);
 char	       *symget(const char *);
 
 int		config_load(struct blind *);
@@ -77,10 +78,28 @@ typedef struct {
 
 grammar	:
 	| grammar '\n'
+	| grammar varset '\n'
 	| grammar set '\n'
 	| grammar error '\n'	{ errors++; }
 	;
 
+varset	: STRING '=' STRING {
+		char *s = $1;
+		while (*s++) {
+                        if (isspace((unsigned char)*s)) {
+                                yyerror("macro contain whitespace");
+                                free($1);
+                                free($3);
+                                YYERROR;
+                        }
+                }
+                if (symset($1, $3, 0) == -1)
+                        log_fatal("cannot store variable");
+                free($1);
+                free($3);
+}
+;               
+
 set	: SET EXPIRE NUMBER {
 	env->bl_ttl = $3;
 }
@@ -141,6 +160,46 @@ lookup(char *s)
 		return (p->k_val);
 	else
 		return (STRING);
+}
+
+int
+symset(const char *nam, const char *val, int persist)
+{
+	struct sym	*sym;
+
+	TAILQ_FOREACH(sym, &symhead, entry) {
+		if (strcmp(nam, sym->nam) == 0)
+			break;
+	}
+
+	if (sym != NULL) {
+		if (sym->persist == 1)
+			return (0);
+		else {
+			free(sym->nam);
+			free(sym->val);
+			TAILQ_REMOVE(&symhead, sym, entry);
+			free(sym);
+		}
+	}
+	if ((sym = calloc(1, sizeof(*sym))) == NULL)
+		return (-1);
+
+	sym->nam = strdup(nam);
+	if (sym->nam == NULL) {
+		free(sym);
+		return (-1);
+	}
+	sym->val = strdup(val);
+	if (sym->val == NULL) {
+		free(sym->nam);
+		free(sym);
+		return (-1);
+	}
+	sym->used = 0;
+	sym->persist = persist;
+	TAILQ_INSERT_TAIL(&symhead, sym, entry);
+	return (0);
 }
 
 char *