From 82ec89480d524a219ad027d1f7c5aa42cc6373d5 Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Mon, 5 Mar 2018 17:46:17 +0100
Subject: [PATCH] networking/interface.c: get rid of global "smallint
 interface_opt_a"

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
 include/libbb.h        |  2 +-
 networking/ifconfig.c  |  8 +++++---
 networking/interface.c | 37 ++++++++++++++-----------------------
 3 files changed, 20 insertions(+), 27 deletions(-)

diff --git a/include/libbb.h b/include/libbb.h
index f1ab1ca6f..fa878433e 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1367,7 +1367,7 @@ struct hwtype {
 	int   FAST_FUNC (*activate)(int fd);
 	int suppress_null_addr;
 };
-extern smallint interface_opt_a;
+#define IFNAME_SHOW_DOWNED_TOO ((char*)(intptr_t)1)
 int display_interfaces(char *ifname) FAST_FUNC;
 int in_ether(const char *bufp, struct sockaddr *sap) FAST_FUNC;
 #if ENABLE_FEATURE_HWIB
diff --git a/networking/ifconfig.c b/networking/ifconfig.c
index 61d91788a..5c47abc16 100644
--- a/networking/ifconfig.c
+++ b/networking/ifconfig.c
@@ -338,6 +338,7 @@ int ifconfig_main(int argc UNUSED_PARAM, char **argv)
 	char *p;
 	/*char host[128];*/
 	const char *host = NULL; /* make gcc happy */
+	IF_FEATURE_IFCONFIG_STATUS(char *show_all_param;)
 
 	did_flags = 0;
 #if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
@@ -349,15 +350,16 @@ int ifconfig_main(int argc UNUSED_PARAM, char **argv)
 	++argv;
 
 #if ENABLE_FEATURE_IFCONFIG_STATUS
-	if (argv[0] && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) {
-		interface_opt_a = 1;
+	show_all_param = NULL;
+	if (argv[0] && argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2]) {
 		++argv;
+		show_all_param = IFNAME_SHOW_DOWNED_TOO;
 	}
 #endif
 
 	if (!argv[0] || !argv[1]) { /* one or no args */
 #if ENABLE_FEATURE_IFCONFIG_STATUS
-		return display_interfaces(argv[0] /* can be NULL */);
+		return display_interfaces(argv[0] ? argv[0] : show_all_param);
 #else
 		bb_error_msg_and_die("no support for status display");
 #endif
diff --git a/networking/interface.c b/networking/interface.c
index 0bbef9879..ff99c2981 100644
--- a/networking/interface.c
+++ b/networking/interface.c
@@ -342,8 +342,6 @@ struct interface {
 };
 
 
-smallint interface_opt_a;	/* show all interfaces */
-
 static struct interface *int_list, *int_last;
 
 
@@ -1086,13 +1084,13 @@ static void ife_print(struct interface *ptr)
 	bb_putchar('\n');
 }
 
-static int do_if_print(struct interface *ife) /*, int *opt_a)*/
+static int do_if_print(struct interface *ife, int show_downed_too)
 {
 	int res;
 
 	res = do_if_fetch(ife);
 	if (res >= 0) {
-		if ((ife->flags & IFF_UP) || interface_opt_a)
+		if ((ife->flags & IFF_UP) || show_downed_too)
 			ife_print(ife);
 	}
 	return res;
@@ -1128,40 +1126,33 @@ static int for_all_interfaces(int (*doit) (struct interface *, void *),
 }
 #endif
 
-/* for ipv4 add/del modes */
-static int if_print(char *ifname)
+int FAST_FUNC display_interfaces(char *ifname)
 {
 	struct interface *ife;
 	int res;
 
-	if (!ifname) {
+	if (!ifname || ifname == IFNAME_SHOW_DOWNED_TOO) {
 		/*res = for_all_interfaces(do_if_print, &interface_opt_a);*/
 		if (!int_list) {
-			int err = if_readlist();
-			if (err < 0)
-				return err;
+			res = if_readlist();
+			if (res < 0)
+				goto ret;
 		}
 		for (ife = int_list; ife; ife = ife->next) {
-			int err = do_if_print(ife); /*, &interface_opt_a);*/
-			if (err)
-				return err;
+			BUILD_BUG_ON((int)(intptr_t)IFNAME_SHOW_DOWNED_TOO != 1);
+			res = do_if_print(ife, (int)(intptr_t)ifname);
+			if (res < 0)
+				goto ret;
 		}
 		return 0;
 	}
+
 	ife = lookup_interface(ifname);
 	res = do_if_fetch(ife);
 	if (res >= 0)
 		ife_print(ife);
-	return res;
-}
-
-int FAST_FUNC display_interfaces(char *ifname)
-{
-	int status;
-
-	status = if_print(ifname);
-
-	return (status < 0); /* status < 0 == 1 -- error */
+ ret:
+	return (res < 0); /* status < 0 == 1 -- error */
 }
 
 #if ENABLE_FEATURE_HWIB