Before scanning, check if the card is up. If it is not the case, exit
with some useful error message. Add some note about this fact in the man page too.
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@ -1,4 +1,4 @@
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/* $NetBSD: ieee80211.c,v 1.25 2010/12/13 17:35:08 pooka Exp $ */
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/* $NetBSD: ieee80211.c,v 1.26 2014/01/07 20:25:24 degroote Exp $ */
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/*
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* Copyright (c) 1983, 1993
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@ -31,7 +31,7 @@
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: ieee80211.c,v 1.25 2010/12/13 17:35:08 pooka Exp $");
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__RCSID("$NetBSD: ieee80211.c,v 1.26 2014/01/07 20:25:24 degroote Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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@ -463,8 +463,19 @@ setifpowersavesleep(prop_dictionary_t env, prop_dictionary_t oenv)
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static int
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scan_exec(prop_dictionary_t env, prop_dictionary_t oenv)
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{
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struct ifreq ifr;
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if (direct_ioctl(env, SIOCGIFFLAGS, &ifr) == -1) {
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perror("ioctl(SIOCGIFFLAGS");
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return -1;
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}
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if ((ifr.ifr_flags & IFF_UP) == 0)
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errx(EXIT_FAILURE, "The interface must be up before scanning.");
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scan_and_wait(env);
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list_scan(env);
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return 0;
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}
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@ -1,4 +1,4 @@
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.\" $NetBSD: ifconfig.8,v 1.105 2013/11/09 13:10:35 kefren Exp $
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.\" $NetBSD: ifconfig.8,v 1.106 2014/01/07 20:25:24 degroote Exp $
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.\"
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.\" Copyright (c) 1983, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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@ -503,6 +503,7 @@ The
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flag may be used to display long SSIDs.
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.Fl v
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also causes received information elements to be displayed symbolically.
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The interface must be up before any scanning operation.
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Only the super-user can use this command.
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.It Cm tunnel Ar src_addr Ns Oo Ar ,src_port Oc Ar dest_addr Ns Oo Ar ,dest_port
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.Oc
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