introducing designated initializers for structures

[Robert P. J. Day]

  attached is an example of a change i'd like to start making, just so
it's more obvious what's being initialized in a structure.

  i forget the initialization rule, though -- what happens with
members of statically-allocated structures in terms of their initial
values?  will they be NULL or 0?  or should every member field be
explicitly initialized?

rday
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diff -pru busybox/networking/interface.c busybox.new/networking/interface.c
--- busybox/networking/interface.c	2006-05-19 19:59:51.000000000 -0400
+++ busybox.new/networking/interface.c	2006-05-20 07:21:49.000000000 -0400
@@ -188,12 +188,15 @@ static char *UNIX_sprint(struct sockaddr
 
 
 static struct aftype unix_aftype = {
-	"unix", "UNIX Domain", AF_UNIX, 0,
-	UNIX_print, UNIX_sprint, NULL, NULL,
-	NULL, NULL, NULL,
-	-1,
-	"/proc/net/unix"
-};
+	.name =		"unix",
+	.title =	"UNIX Domain",
+	.af =		AF_UNIX,
+	.alen =		0,
+	.print =	UNIX_print,
+	.sprint =	UNIX_sprint,
+	.fd =		-1,
+	.flag_file =	"/proc/net/unix"
+} ;
 #endif							/* HAVE_AFUNIX */
 
 #if HAVE_AFINET
@@ -317,13 +320,12 @@ static int INET_getnetmask(char *adr, st
 #endif							/* KEEP_UNUSED */
 
 static struct aftype inet_aftype = {
-	"inet", "DARPA Internet", AF_INET, sizeof(unsigned long),
-	NULL /* UNUSED INET_print */ , INET_sprint,
-	NULL /* UNUSED INET_input */ , NULL /* UNUSED INET_reserror */ ,
-	NULL /*INET_rprint */ , NULL /*INET_rinput */ ,
-	NULL /* UNUSED INET_getnetmask */ ,
-	-1,
-	NULL
+	.name =		"inet",
+	.title =	"DARPA Internet",
+	.af =		AF_INET,
+	.alen =		sizeof(unsigned long),
+	.sprint =	INET_sprint,
+	.fd =		-1
 };
 
 #endif							/* HAVE_AFINET */
@@ -387,14 +389,13 @@ static int INET6_input(int type, char *b
 #endif							/* KEEP_UNUSED */
 
 static struct aftype inet6_aftype = {
-	"inet6", "IPv6", AF_INET6, sizeof(struct in6_addr),
-	NULL /* UNUSED INET6_print */ , INET6_sprint,
-	NULL /* UNUSED INET6_input */ , NULL /* UNUSED INET6_reserror */ ,
-	NULL /*INET6_rprint */ , NULL /*INET6_rinput */ ,
-	NULL /* UNUSED INET6_getnetmask */ ,
-	-1,
-	NULL
-};
+	.name =		"inet6",
+	.title =	"IPv6",
+	.af =		AF_INET6,
+	.alen =		sizeof(struct in6_addr),
+	.sprint =	INET6_sprint,
+	.fd =		-1
+} ;
 
 #endif							/* HAVE_AFINET6 */