*: remove some uses of argc

function                                             old     new   delta
whoami_main                                           34      37      +3
logname_main                                          60      63      +3
hostid_main                                           35      38      +3
ttysize_main                                         136     135      -1
nmeter_main                                          673     672      -1
logger_main                                          387     386      -1
uuencode_main                                        330     328      -2
ifupdown_main                                       2125    2123      -2
mesg_main                                            158     155      -3
free_main                                            333     330      -3
cal_main                                             902     899      -3
acpid_main                                           443     440      -3
ar_main                                              196     189      -7
find_main                                            476     467      -9
ifconfig_main                                       1235    1221     -14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/12 up/down: 9/-49)            Total: -40 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

networking/ifconfig.c

@@ -260,7 +260,7 @@ static int in_ether(const char *bufp, struct sockaddr *sap);
  * Our main function.
  */
 int ifconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ifconfig_main(int argc, char **argv)
+int ifconfig_main(int argc UNUSED_PARAM, char **argv)
 {
 	struct ifreq ifr;
 	struct sockaddr_in sai;
@@ -291,19 +291,17 @@ int ifconfig_main(int argc, char **argv)
 
 	/* skip argv[0] */
 	++argv;
-	--argc;
 
 #if ENABLE_FEATURE_IFCONFIG_STATUS
-	if (argc > 0 && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) {
+	if (argv[0] && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) {
 		interface_opt_a = 1;
-		--argc;
 		++argv;
 	}
 #endif
 
-	if (argc <= 1) {
+	if (!argv[0] || !argv[1]) { /* one or no args */
 #if ENABLE_FEATURE_IFCONFIG_STATUS
-		return display_interfaces(argc ? *argv : NULL);
+		return display_interfaces(argv[0] /* can be NULL */);
 #else
 		bb_error_msg_and_die("no support for status display");
 #endif

networking/ifupdown.c

@@ -1142,7 +1142,7 @@ static llist_t *read_iface_state(void)
 
 
 int ifupdown_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ifupdown_main(int argc, char **argv)
+int ifupdown_main(int argc UNUSED_PARAM, char **argv)
 {
 	int (*cmds)(struct interface_defn_t *);
 	struct interfaces_file_t *defn;
@@ -1161,7 +1161,8 @@ int ifupdown_main(int argc, char **argv)
 	}
 
 	getopt32(argv, OPTION_STR, &interfaces);
-	if (argc - optind > 0) {
+	argv += optind;
+	if (argv[0]) {
 		if (DO_ALL) bb_show_usage();
 	} else {
 		if (!DO_ALL) bb_show_usage();
@@ -1175,7 +1176,7 @@ int ifupdown_main(int argc, char **argv)
 	if (DO_ALL) {
 		target_list = defn->autointerfaces;
 	} else {
-		llist_add_to_end(&target_list, argv[optind]);
+		llist_add_to_end(&target_list, argv[0]);
 	}
 
 	/* Update the interfaces */

networking/nc_bloaty.c

@@ -673,7 +673,7 @@ Debug("wrote %d to net, errno %d", rr, errno);
 
 /* main: now we pull it all together... */
 int nc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int nc_main(int argc, char **argv)
+int nc_main(int argc UNUSED_PARAM, char **argv)
 {
 	char *str_p, *str_s;
 	IF_NC_EXTRA(char *str_i, *str_o;)
@@ -702,7 +702,6 @@ int nc_main(int argc, char **argv)
 	while (*++proggie) {
 		if (strcmp(*proggie, "-e") == 0) {
 			*proggie = NULL;
-			argc = proggie - argv;
 			proggie++;
 			goto e_found;
 		}

networking/zcip.c

@@ -182,7 +182,7 @@ static ALWAYS_INLINE unsigned random_delay_ms(unsigned secs)
  * main program
  */
 int zcip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int zcip_main(int argc, char **argv)
+int zcip_main(int argc UNUSED_PARAM, char **argv)
 {
 	int state;
 	char *r_opt;
@@ -241,7 +241,6 @@ int zcip_main(int argc, char **argv)
 			bb_error_msg_and_die("invalid link address");
 		}
 	}
-	argc -= optind;
 	argv += optind - 1;
 
 	/* Now: argv[0]:junk argv[1]:intf argv[2]:script argv[3]:NULL */