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I've just read the replies which have been sent to the list only through
the web interface. I'm not subscribed to this list so I set the Reply-To:
appropriately in those in which I expected a reply. I thought this was the
right place to ask this, I wanted to ask the users.

Just to provide a little more than stupid ranting, I've attached the
changes I made to ifconfig locally. I hope it's correct but decided yourself
whether you want to use a patch provided by someone not capable of using
ifconfig without the right amount of rope. Now I could only enter=20
ifconfig 1500 && echo 'Success!' if I wanted to fool myself.

EOT,
Christian

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? .gdbinit
? ifconfig
? ifconfig.cat8
Index: ifconfig.8
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /cvsroot/src/sbin/ifconfig/ifconfig.8,v
retrieving revision 1.72
diff -u -r1.72 ifconfig.8
--- ifconfig.8	1 Mar 2004 00:19:06 -0000	1.72
+++ ifconfig.8	13 Apr 2004 08:08:20 -0000
@@ -37,11 +37,14 @@
 .Nd configure network interface parameters
 .Sh SYNOPSIS
 .Nm
-.Ar interface address_family
+.Ar interface
+.Oo=20
+.Ar address_family
 .Oo
 .Ar address
 .Op Ar dest_address
 .Oc
+.Oc
 .Op Ar parameters
 .Nm
 .Op Fl Lmvz
@@ -84,6 +87,8 @@
 .Tn DARPA
 Internet address expressed in the Internet standard
 .Dq dot notation .
+.Nm does not accept 1-, 2-, or 3-part dotted addresses; all four parts must
+be specified.
 For the Xerox Network Systems(tm) family,
 addresses are
 .Ar net:a.b.c.d.e.f ,
@@ -121,6 +126,9 @@
 .Dq iso ,
 and
 .Dq ns .
+If omitted
+.Dq inet
+is assumed.
 .It Ar interface
 The
 .Ar interface
@@ -635,6 +643,7 @@
 tried to alter an interface's configuration.
 .Sh SEE ALSO
 .Xr netstat 1 ,
+.Xr inet_pton 3 ,
 .Xr ifmedia 4 ,
 .Xr netintro 4 ,
 .Xr ifconfig.if 5 ,
Index: ifconfig.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /cvsroot/src/sbin/ifconfig/ifconfig.c,v
retrieving revision 1.141
diff -u -r1.141 ifconfig.c
--- ifconfig.c	1 Mar 2004 00:11:33 -0000	1.141
+++ ifconfig.c	13 Apr 2004 08:08:21 -0000
@@ -2720,6 +2720,7 @@
 	struct sockaddr_in *gasin =3D sintab[which];
 	struct hostent *hp;
 	struct netent *np;
+	int ret;
=20
 	gasin->sin_len =3D sizeof(*gasin);
 	if (which !=3D MASK)
@@ -2733,13 +2734,19 @@
 		}
 	}
=20
-	if (inet_aton(str, &gasin->sin_addr) =3D=3D 0) {
+	ret =3D inet_pton(gasin->sin_family, str, &gasin->sin_addr);
+	if (ret =3D=3D 1) {
 		if ((hp =3D gethostbyname(str)) !=3D NULL)
 			(void) memcpy(&gasin->sin_addr, hp->h_addr, hp->h_length);
 		else if ((np =3D getnetbyname(str)) !=3D NULL)
 			gasin->sin_addr =3D inet_makeaddr(np->n_net, INADDR_ANY);
 		else
 			errx(EXIT_FAILURE, "%s: bad value", str);
+	} else if (ret =3D=3D 0) {
+			errx(EXIT_FAILURE,
+				"%s: not parsable for address family", str);
+	} else {
+			err(EXIT_FAILURE, "inet_pton() failed for \"%s\"", str);
 	}
 }
=20

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