Move another common functionality (reproduced so far with cut'n'paste)

to apps.c, and give it the hopefully descriptive name parse_yesno().

apps/apps.c

@@ -1707,22 +1707,7 @@ CA_DB *load_index(char *dbfile, DB_ATTR *db_attr)
 #ifdef RL_DEBUG
 			BIO_printf(bio_err, "DEBUG[load_index]: unique_subject = \"%s\"\n", p);
 #endif
-			switch(*p)
-				{
-			case 'f': /* false */
-			case 'F': /* FALSE */
-			case 'n': /* no */
-			case 'N': /* NO */
-				retdb->attributes.unique_subject = 0;
-				break;
-			case 't': /* true */
-			case 'T': /* TRUE */
-			case 'y': /* yes */
-			case 'Y': /* YES */
-			default:
-				retdb->attributes.unique_subject = 1;
-				break;
-				}
+			retdb->attributes.unique_subject = parse_yesno(p,1);
 			}
 		}
 
@@ -1962,6 +1947,35 @@ void free_index(CA_DB *db)
 		}
 	}
 
+int parse_yesno(char *str, int def)
+	{
+	int ret = def;
+	if (str)
+		{
+		switch (*str)
+			{
+		case 'f': /* false */
+		case 'F': /* FALSE */
+		case 'n': /* no */
+		case 'N': /* NO */
+		case '0': /* 0 */
+			ret = 0;
+			break;
+		case 't': /* true */
+		case 'T': /* TRUE */
+		case 'y': /* yes */
+		case 'Y': /* YES */
+		case '1': /* 1 */
+			ret = 0;
+			break;
+		default:
+			ret = def;
+			break;
+			}
+		}
+	return ret;
+	}
+
 /*
  * subject is expected to be in the format /type0=value0/type1=value1/type2=...
  * where characters may be escaped by \

apps/apps.h

@@ -315,6 +315,7 @@ int save_index(char *dbfile, char *suffix, CA_DB *db);
 int rotate_index(char *dbfile, char *new_suffix, char *old_suffix);
 void free_index(CA_DB *db);
 int index_name_cmp(const char **a, const char **b);
+int parse_yesno(char *str, int def);
 
 X509_NAME *parse_name(char *str, long chtype, int multirdn);
 

apps/ca.c

@@ -131,6 +131,7 @@
 #define ENV_NAMEOPT		"name_opt"
 #define ENV_CERTOPT		"cert_opt"
 #define ENV_EXTCOPY		"copy_extensions"
+#define ENV_UNIQUE_SUBJECT	"unique_subject"
 
 #define ENV_DATABASE		"database"
 
@@ -638,28 +639,13 @@ bad:
 	app_RAND_load_file(randfile, bio_err, 0);
 
 	db_attr.unique_subject = 1;
-	p = NCONF_get_string(conf, section, "unique_subject");
+	p = NCONF_get_string(conf, section, ENV_UNIQUE_SUBJECT);
 	if (p)
 		{
 #ifdef RL_DEBUG
 		BIO_printf(bio_err, "DEBUG: unique_subject = \"%s\"\n", p);
 #endif
-		switch(*p)
-			{
-		case 'f': /* false */
-		case 'F': /* FALSE */
-		case 'n': /* no */
-		case 'N': /* NO */
-			db_attr.unique_subject = 0;
-			break;
-		case 't': /* true */
-		case 'T': /* TRUE */
-		case 'y': /* yes */
-		case 'Y': /* YES */
-		default:
-			db_attr.unique_subject = 1;
-			break;
-			}
+		db_attr.unique_subject = parse_yesno(p,1);
 		}
 #ifdef RL_DEBUG
 	else