Added special strdup to liboptions, to prevent memory leaks for option strings

If you are doing memory leak debugging you don't want to see any leaks when
stopping the program.

src/liboptions/options.c

@@ -36,6 +36,27 @@ static option_t *option_head = NULL;
 static option_t **option_tailp = &option_head;
 static int first_option = 1;
 
+static struct options_strdup_entry {
+	struct options_strdup_entry *next;
+	char s[1];
+} *options_strdup_list = NULL;
+
+char *options_strdup(const char *s)
+{
+	struct options_strdup_entry *o;
+
+	o = malloc(sizeof(struct options_strdup_entry) + strlen(s));
+	if (!o) {
+		PDEBUG(DOPTIONS, DEBUG_ERROR, "No mem!\n");
+		abort();
+	}
+	o->next = options_strdup_list;
+	options_strdup_list = o;
+	strcpy(o->s, s);
+
+	return o->s;
+}
+
 void option_add(int short_option, const char *long_option, int parameter_count)
 {
 	option_t *option;
@@ -158,7 +179,7 @@ int options_config_file(const char *config_file, int (*handle_options)(int short
 				param[j++] = *p++;
 			}
 			param[j] = '\0';
-			argv[i] = strdup(param);
+			argv[i] = options_strdup(param);
 			sprintf(strchr(params, '\0'), " '%s'", param);
 			/* skip white spaces behind option */
 			while (*p > '\0' && *p <= ' ')
@@ -273,3 +294,21 @@ int option_is_first(void)
 	return first_option;
 }
 
+void options_free(void)
+{
+	while (options_strdup_list) {
+		struct options_strdup_entry *o;
+		o = options_strdup_list;
+		options_strdup_list = o->next;
+		free(o);
+	}
+
+	while (option_head) {
+		option_t *o;
+		o = option_head;
+		option_head = o->next;
+		free(o);
+	}
+	option_tailp = &option_head;
+}
+

src/liboptions/options.h

@@ -1,6 +1,8 @@
 
+char *options_strdup(const char *s);
 void option_add(int short_option, const char *long_option, int parameter_count);
 int options_config_file(const char *config_file, int (*handle_options)(int short_option, int argi, char *argv[]));
 int options_command_line(int argc, char *argv[], int (*handle_options)(int short_option, int argi, char *argv[]));
 int option_is_first(void);
+void options_free(void);