brctl: eliminate stray data object

brctl: use constant fd to reduce parameter passing
runsvdir: do not use data/bss
od: reuse bb_argv_dash
last: do not go into endless loop on read error
mount: make it not fail scripts/find_bad_common_bufsiz check
dc: add INIT_G() (no-op for dc, but we want uniform usage of "G trick")

function                                             old     new   delta
runsvdir_main                                       1646    1672     +26
set_pgrp                                               1       -      -1
exitsoon                                               1       -      -1
check                                                679     678      -1
svnum                                                  4       -      -4
svdir                                                  4       -      -4
sv                                                     4       -      -4
stamplog                                               4       -      -4
rploglen                                               4       -      -4
rplog                                                  4       -      -4
mount_main                                           995     988      -7
static.default_file_list                               8       -      -8
pfd                                                    8       -      -8
logpipe                                                8       -      -8
static.info                                           20       -     -20
brctl_main                                           767     739     -28
------------------------------------------------------------------------------
(add/remove: 0/12 grow/shrink: 1/3 up/down: 26/-106)          Total: -80 bytes
   text    data     bss     dec     hex filename
 793327     662    7412  801401   c3a79 busybox_old
 793329     641    7372  801342   c3a3e busybox_unstripped

1 files changed, 38 insertions, 31 deletions

diff --git a/networking/brctl.c b/networking/brctl.c
index bbd14c4..2bb03dd 100644
--- a/networking/brctl.c
+++ b/networking/brctl.c
@@ -33,13 +33,15 @@
 
 #if ENABLE_FEATURE_BRCTL_FANCY
 #include <linux/if_bridge.h>
+
 /* FIXME: These 4 funcs are not really clean and could be improved */
-static inline ALWAYS_INLINE void strtotimeval(struct timeval *tv,
-											  const char *time_str)
+static ALWAYS_INLINE void strtotimeval(struct timeval *tv,
+		const char *time_str)
 {
 	double secs;
 #if BRCTL_USE_INTERNAL
-	if (!(secs = /*bb_*/strtod(time_str, NULL)))
+	secs = /*bb_*/strtod(time_str, NULL);
+	if (!secs)
 #else
 	if (sscanf(time_str, "%lf", &secs) != 1)
 #endif
@@ -48,7 +50,7 @@ static inline ALWAYS_INLINE void strtotimeval(struct timeval *tv,
 	tv->tv_usec = 1000000 * (secs - tv->tv_sec);
 }
 
-static inline ALWAYS_INLINE unsigned long __tv_to_jiffies(const struct timeval *tv)
+static ALWAYS_INLINE unsigned long __tv_to_jiffies(const struct timeval *tv)
 {
 	unsigned long long jif;
 
@@ -56,7 +58,7 @@ static inline ALWAYS_INLINE unsigned long __tv_to_jiffies(const struct timeval *
 
 	return jif/10000;
 }
-# if 00
+# if 0
 static void __jiffies_to_tv(struct timeval *tv, unsigned long jiffies)
 {
 	unsigned long long tvusec;
@@ -74,7 +76,7 @@ static unsigned long str_to_jiffies(const char *time_str)
 }
 
 static void arm_ioctl(unsigned long *args,
-				 unsigned long arg0, unsigned long arg1, unsigned long arg2)
+		unsigned long arg0, unsigned long arg1, unsigned long arg2)
 {
 	args[0] = arg0;
 	args[1] = arg1;
@@ -84,10 +86,9 @@ static void arm_ioctl(unsigned long *args,
 #endif
 
 
-int brctl_main(int argc ATTRIBUTE_UNUSED, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int brctl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int brctl_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
-	int fd;
 	static const char keywords[] ALIGN1 =
 		"addbr\0" "delbr\0" "addif\0" "delif\0"
 	USE_FEATURE_BRCTL_FANCY(
@@ -96,16 +97,19 @@ int brctl_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		"setpathcost\0" "setportprio\0" "setbridgeprio\0"
 	)
 		USE_FEATURE_BRCTL_SHOW("showmacs\0" "show\0");
+
 	enum { ARG_addbr = 0, ARG_delbr, ARG_addif, ARG_delif
 		USE_FEATURE_BRCTL_FANCY(,
 		   ARG_stp,
 		   ARG_setageing, ARG_setfd, ARG_sethello, ARG_setmaxage,
 		   ARG_setpathcost, ARG_setportprio, ARG_setbridgeprio
 		)
-		  USE_FEATURE_BRCTL_SHOW(, ARG_showmacs, ARG_show) };
+		  USE_FEATURE_BRCTL_SHOW(, ARG_showmacs, ARG_show)
+	};
+
+	int fd;
 	smallint key;
 	struct ifreq ifr;
-	static char info[] = "bridge %s\0 iface %s";
 	char *br, *brif;
 #if ENABLE_FEATURE_BRCTL_FANCY
 	unsigned long args[4] = {0, 0, 0, 0};
@@ -125,25 +129,26 @@ int brctl_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		}
 #endif
 		fd = xsocket(AF_INET, SOCK_STREAM, 0);
-		br = *(argv++);
+		br = *argv++;
 
 		if (key == ARG_addbr || key == ARG_delbr) { /* addbr or delbr */
 			ioctl_or_perror_and_die(fd,
-								key == ARG_addbr ? SIOCBRADDBR : SIOCBRDELBR,
-								br, info, br);
+					key == ARG_addbr ? SIOCBRADDBR : SIOCBRDELBR,
+					br, "bridge %s", br);
 			goto done;
 		}
 		if (!*argv) /* all but 'show' need at least one argument */
 			bb_show_usage();
 		safe_strncpy(ifr.ifr_name, br, IFNAMSIZ);
 		if (key == ARG_addif || key == ARG_delif) { /* addif or delif */
-			brif = *(argv++);
-			if (!(ifr.ifr_ifindex = if_nametoindex(brif))) {
-				bb_perror_msg_and_die(info+11, brif);
+			brif = *argv++;
+			ifr.ifr_ifindex = if_nametoindex(brif);
+			if (!ifr.ifr_ifindex) {
+				bb_perror_msg_and_die("iface %s", brif);
 			}
 			ioctl_or_perror_and_die(fd,
-								  key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF,
-								  &ifr, info, br);
+					key == ARG_addif ? SIOCBRADDIF : SIOCBRDELIF,
+					&ifr, "bridge %s", br);
 			goto done;
 		}
 #if ENABLE_FEATURE_BRCTL_FANCY
@@ -156,11 +161,10 @@ int brctl_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		}
 		if ((unsigned)(key - ARG_stp) < 5) { /* time related ops */
 			unsigned long op = (key == ARG_setageing) ? BRCTL_SET_AGEING_TIME :
-							(key == ARG_setfd) ? BRCTL_SET_BRIDGE_FORWARD_DELAY:
-							(key == ARG_sethello) ? BRCTL_SET_BRIDGE_HELLO_TIME:
-							(key == ARG_setmaxage) ? BRCTL_SET_BRIDGE_MAX_AGE :
-							-1/* will never be used */;
-			arm_ioctl(args, op, str_to_jiffies (*argv), 0);
+			                   (key == ARG_setfd) ? BRCTL_SET_BRIDGE_FORWARD_DELAY :
+			                   (key == ARG_sethello) ? BRCTL_SET_BRIDGE_HELLO_TIME :
+			                   /*key == ARG_setmaxage*/ BRCTL_SET_BRIDGE_MAX_AGE;
+			arm_ioctl(args, op, str_to_jiffies(*argv), 0);
 			goto fire;
 		}
 		port = -1;
@@ -168,25 +172,28 @@ int brctl_main(int argc ATTRIBUTE_UNUSED, char **argv)
 			int ifidx[MAX_PORTS];
 			unsigned i;
 
-			if (!(port = if_nametoindex(*argv)))
+			port = if_nametoindex(*argv);
+			if (!port)
 				bb_error_msg_and_die(bb_msg_invalid_arg, *argv, "port");
 			argv++;
 			memset(ifidx, 0, sizeof ifidx);
 			arm_ioctl(args, BRCTL_GET_PORT_LIST, (unsigned long)ifidx,
 					  MAX_PORTS);
 			xioctl(fd, SIOCDEVPRIVATE, &ifr);
-			for (i = 0; i < MAX_PORTS; i++)
+			for (i = 0; i < MAX_PORTS; i++) {
 				if (ifidx[i] == port) {
 					port = i;
 					break;
 				}
+			}
 		}
 		if (key == ARG_setpathcost
-			|| key == ARG_setportprio || key == ARG_setbridgeprio) {
+		 || key == ARG_setportprio
+		 || key == ARG_setbridgeprio
+		) {
 			unsigned long op = (key == ARG_setpathcost) ? BRCTL_SET_PATH_COST :
-						(key == ARG_setportprio) ? BRCTL_SET_PORT_PRIORITY :
-						(key == ARG_setbridgeprio) ? BRCTL_SET_BRIDGE_PRIORITY :
-						-1/* will never be used */;
+			                   (key == ARG_setportprio) ? BRCTL_SET_PORT_PRIORITY :
+			                   /*key == ARG_setbridgeprio*/ BRCTL_SET_BRIDGE_PRIORITY;
 			unsigned long arg1 = port;
 			unsigned long arg2;
 # if BRCTL_USE_INTERNAL
@@ -194,7 +201,7 @@ int brctl_main(int argc ATTRIBUTE_UNUSED, char **argv)
 # else
 			if (sscanf(*argv, "%i", &tmp) != 1)
 				bb_error_msg_and_die(bb_msg_invalid_arg, *argv,
-									 key == ARG_setpathcost ? "cost" : "prio");
+						key == ARG_setpathcost ? "cost" : "prio");
 # endif
 			if (key == ARG_setbridgeprio) {
 				arg1 = tmp;
@@ -212,6 +219,6 @@ int brctl_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		if (ENABLE_FEATURE_CLEAN_UP)
 			close(fd);
 	}
-USE_FEATURE_BRCTL_SHOW(out:)
+ USE_FEATURE_BRCTL_SHOW(out:)
 	return EXIT_SUCCESS;
 }