getopt32: fix llist_t options ordering. llist_rev is not unused.

function                                             old     new   delta
tar_main                                             705     695     -10
sort_main                                            928     918     -10
decode_format_string                                 886     876     -10
run_parts_main                                       197     185     -12
ps_main                                              513     500     -13
wget_main                                           2764    2750     -14
awk_main                                            1014    1000     -14
od_main                                             2886    2866     -20
llist_rev                                             25       -     -25
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/8 up/down: 0/-128)           Total: -128 bytes

archival/tar.c

@@ -864,10 +864,9 @@ int tar_main(int argc, char **argv)
 		char *cp = last_char_is(argv[optind], '/');
 		if (cp > argv[optind])
 			*cp = '\0';
-		llist_add_to(&tar_handle->accept, argv[optind]);
+		llist_add_to_end(&tar_handle->accept, argv[optind]);
 		optind++;
 	}
-	tar_handle->accept = llist_rev(tar_handle->accept);
 
 	if (tar_handle->accept || tar_handle->reject)
 		tar_handle->filter = filter_accept_reject_list;

coreutils/od_bloaty.c

@@ -1312,7 +1312,6 @@ int od_main(int argc, char **argv)
 	if (opt & OPT_l) decode_format_string("d4");
 	if (opt & OPT_o) decode_format_string("o2");
 	//if (opt & OPT_t)...
-	lst_t = llist_rev(lst_t);
 	while (lst_t) {
 		decode_format_string(lst_t->data);
 		lst_t = lst_t->link;

coreutils/sort.c

@@ -296,7 +296,6 @@ int sort_main(int argc, char **argv)
 		key_separator = str_t[0];
 	}
 	/* parse sort key */
-	lst_k = llist_rev(lst_k);
 	while (lst_k) {
 		enum {
 			FLAG_allowed_for_k =

debianutils/run_parts.c

@@ -131,9 +131,6 @@ int run_parts_main(int argc, char **argv)
 		 */
 		umask(xstrtoul_range(umask_p, 8, 0, 07777));
 	}
-//XXX: FIXME: reverse the list before handing it over to the user.
-//XXX: FIXME: The common case seems to be to use the order given by the user
-	arg_list = llist_rev(arg_list); /* XXX: getopt32 appends them */
 	for (tmp = 1; arg_list; arg_list = arg_list->link, tmp++)
 		G.cmd[tmp] = arg_list->data;
 	/* G.cmd[tmp] = NULL; - G is already zeroed out */

editors/awk.c

@@ -2707,7 +2707,6 @@ int awk_main(int argc, char **argv)
 	argv += optind;
 	argc -= optind;
 	if (opt & 0x1) setvar_s(V[FS], opt_F); // -F
-	opt_v = llist_rev(opt_v);
 	while (opt_v) { /* -v */
 		if (!is_assignment(llist_pop(&opt_v)))
 			bb_show_usage();

include/libbb.h

@@ -294,7 +294,6 @@ extern void sig_pause(void);
 #define wait_stopped(w) (((w) & 127) == 127)
 
 
-
 void xsetgid(gid_t gid);
 void xsetuid(uid_t uid);
 void xchdir(const char *path);
@@ -343,7 +342,7 @@ int xsocket_stream(len_and_sockaddr **lsap);
 /* Create server socket bound to bindaddr:port. bindaddr can be NULL,
  * numeric IP ("N.N.N.N") or numeric IPv6 address,
  * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
- * If there is no suffix, port argument is used */
+ * Only if there is no suffix, port argument is used */
 int create_and_bind_stream_or_die(const char *bindaddr, int port);
 int create_and_bind_dgram_or_die(const char *bindaddr, int port);
 /* Create client TCP socket connected to peer:port. Peer cannot be NULL.
@@ -456,14 +455,17 @@ extern FILE *fopen_or_warn(const char *filename, const char *mode);
 extern FILE *fopen_or_warn_stdin(const char *filename);
 
 
-extern char *utoa(unsigned n);
+char *utoa(unsigned n);
-extern char *itoa(int n);
+char *itoa(int n);
 /* Returns a pointer past the formatted number, does NOT null-terminate */
-extern char *utoa_to_buf(unsigned n, char *buf, unsigned buflen);
+char *utoa_to_buf(unsigned n, char *buf, unsigned buflen);
-extern char *itoa_to_buf(int n, char *buf, unsigned buflen);
+char *itoa_to_buf(int n, char *buf, unsigned buflen);
-extern void smart_ulltoa5(unsigned long long ul, char buf[5]);
+void smart_ulltoa5(unsigned long long ul, char buf[5]);
-/* Put a string of hex bytes (ala "1b"), return advanced pointer */
+//TODO: provide pointer to buf (avoid statics)?
-extern char *bin2hex(char *buf, const char *cp, int count);
+const char *make_human_readable_str(unsigned long long size,
+		unsigned long block_size, unsigned long display_unit);
+/* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
+char *bin2hex(char *buf, const char *cp, int count);
 
 struct suffix_mult {
 	const char *suffix;
@@ -580,16 +582,20 @@ extern uint32_t option_mask32;
 extern uint32_t getopt32(int argc, char **argv, const char *applet_opts, ...);
 
 
-typedef struct llist_s {
+typedef struct llist_t {
 	char *data;
-	struct llist_s *link;
+	struct llist_t *link;
 } llist_t;
-extern void llist_add_to(llist_t **old_head, void *data);
+void llist_add_to(llist_t **old_head, void *data);
-extern void llist_add_to_end(llist_t **list_head, void *data);
+void llist_add_to_end(llist_t **list_head, void *data);
-extern void *llist_pop(llist_t **elm);
+void *llist_pop(llist_t **elm);
-extern void llist_unlink(llist_t **head, llist_t *elm);
+void llist_unlink(llist_t **head, llist_t *elm);
-extern void llist_free(llist_t *elm, void (*freeit)(void *data));
+void llist_free(llist_t *elm, void (*freeit)(void *data));
-extern llist_t* llist_rev(llist_t *list);
+llist_t *llist_rev(llist_t *list);
+/* BTW, surprisingly, changing API to 
+ *   llist_t *llist_add_to(llist_t *old_head, void *data)
+ * etc does not result in smaller code... */
+
 
 #if ENABLE_FEATURE_PIDFILE
 int write_pidfile(const char *path);
@@ -674,10 +680,6 @@ extern int del_loop(const char *device);
 extern int set_loop(char **device, const char *file, unsigned long long offset);
 
 
-//TODO: provide pointer to buf (avoid statics)?
-const char *make_human_readable_str(unsigned long long size,
-		unsigned long block_size, unsigned long display_unit);
-
 //TODO: pass buf pointer or return allocated buf (avoid statics)?
 char *bb_askpass(int timeout, const char * prompt);
 int bb_ask_confirmation(void);
@@ -725,14 +727,14 @@ extern void print_login_issue(const char *issue_file, const char *tty);
 extern void print_login_prompt(void);
 
 
-extern int get_terminal_width_height(const int fd, int *width, int *height);
+int get_terminal_width_height(const int fd, int *width, int *height);
 
 char *is_in_ino_dev_hashtable(const struct stat *statbuf);
 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name);
 void reset_ino_dev_hashtable(void);
 #ifdef __GLIBC__
 /* At least glibc has horrendously large inline for this, so wrap it */
-extern unsigned long long bb_makedev(unsigned int major, unsigned int minor);
+unsigned long long bb_makedev(unsigned int major, unsigned int minor);
 #undef makedev
 #define makedev(a,b) bb_makedev(a,b)
 #endif
@@ -745,7 +747,7 @@ extern unsigned long long bb_makedev(unsigned int major, unsigned int minor);
 #else
 #define MAX_HISTORY 0
 #endif
-struct line_input_t {
+typedef struct line_input_t {
 	int flags;
 	const char *path_lookup;
 #if MAX_HISTORY
@@ -754,7 +756,7 @@ struct line_input_t {
 	USE_FEATURE_EDITING_SAVEHISTORY(const char *hist_file;)
 	char *history[MAX_HISTORY + 1];
 #endif
-};
+} line_input_t;
 enum {
 	DO_HISTORY = 1 * (MAX_HISTORY > 0),
 	SAVE_HISTORY = 2 * (MAX_HISTORY > 0) * ENABLE_FEATURE_EDITING_SAVEHISTORY,
@@ -764,7 +766,6 @@ enum {
 	WITH_PATH_LOOKUP = 0x20,
 	FOR_SHELL = DO_HISTORY | SAVE_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
 };
-typedef struct line_input_t line_input_t;
 line_input_t *new_line_input_t(int flags);
 int read_line_input(const char* prompt, char* command, int maxsize, line_input_t *state);
 #else
@@ -798,7 +799,7 @@ typedef struct {
 	/* sizeof(task_struct.comm) in /usr/include/linux/sched.h */
 	char state[4];
 	char comm[COMM_LEN];
-//	user/group? - use passwd/group parsing functions
+	/* user/group? - use passwd/group parsing functions */
 } procps_status_t;
 enum {
 	PSSCAN_PID      = 1 << 0,
@@ -902,18 +903,22 @@ extern const char bb_dev_null[];
 extern const int const_int_0;
 extern const int const_int_1;
 
+
 #ifndef BUFSIZ
 #define BUFSIZ 4096
 #endif
+// TODO: provide hard guarantees on minimum size of bb_common_bufsiz1
 extern char bb_common_bufsiz1[BUFSIZ+1];
 /* This struct is deliberately not defined. */
 /* See docs/keep_data_small.txt */
 struct globals;
-/* Magic prevents this from going into rodata */
+/* '*const' ptr makes gcc optimize code much better.
-/* If you want to assign a value, use PTR_TO_GLOBALS = xxx */
+ * Magic prevents ptr_to_globals from going into rodata
+ * If you want to assign a value, use PTR_TO_GLOBALS = xxx */
 extern struct globals *const ptr_to_globals;
 #define PTR_TO_GLOBALS (*(struct globals**)&ptr_to_globals)
 
+
 /* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
  * use bb_default_login_shell and following defines.
  * If you change LIBBB_DEFAULT_LOGIN_SHELL,

libbb/getopt32.c

@@ -242,7 +242,7 @@ Special characters:
         llist_t *patterns = NULL;
 
         (this pointer must be initializated to NULL if the list is empty
-        as required by *llist_add_to(llist_t *old_head, char *new_item).)
+        as required by llist_add_to_end(llist_t **old_head, char *new_item).)
 
         opt_complementary = "e::";
 
@@ -487,7 +487,7 @@ getopt32(int argc, char **argv, const char *applet_opts, ...)
 		if (on_off->counter)
 			(*(on_off->counter))++;
 		if (on_off->list_flg) {
-			llist_add_to((llist_t **)(on_off->optarg), optarg);
+			llist_add_to_end((llist_t **)(on_off->optarg), optarg);
 		} else if (on_off->optarg) {
 			*(char **)(on_off->optarg) = optarg;
 		}

libbb/llist.c

@@ -91,18 +91,19 @@ void llist_free(llist_t * elm, void (*freeit) (void *data))
 	}
 }
 
-/* Reverse list order. Useful since getopt32 saves option params
+#ifdef UNUSED
- * in reverse order */
+/* Reverse list order. */
 llist_t *llist_rev(llist_t *list)
 {
-	llist_t *new = NULL;
+	llist_t *rev = NULL;
 
 	while (list) {
 		llist_t *next = list->link;
 
-		list->link = new;
+		list->link = rev;
-		new = list;
+		rev = list;
 		list = next;
 	}
-	return new;
+	return rev;
 }
+#endif

networking/wget.c

@@ -159,7 +159,7 @@ int wget_main(int argc, char **argv)
 	if (headers_llist) {
 		int size = 1;
 		char *cp;
-		llist_t *ll = headers_llist = llist_rev(headers_llist);
+		llist_t *ll = headers_llist;
 		while (ll) {
 			size += strlen(ll->data) + 2;
 			ll = ll->link;

procps/ps.c

@@ -253,7 +253,6 @@ int ps_main(int argc, char **argv)
 	opt_complementary = "o::";
 	getopt32(argc, argv, "o:aAdefl", &opt_o);
 	if (opt_o) {
-		opt_o = llist_rev(opt_o);
 		do {
 			parse_o(opt_o->data);
 			opt_o = opt_o->link;