1 .\" Copyright (C) 1995, 1996, 1997, 1998, 1999, and 2000 WIDE Project.
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5 .\" modification, are permitted provided that the following conditions
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28 .\" Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
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32 .\" modification, are permitted provided that the following conditions
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43 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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45 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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52 .\" $FreeBSD: src/lib/libutil/realhostname_sa.3,v 1.11 2005/02/13 22:25:14 ru Exp $
69 .Fn realhostname_sa "char *host" "size_t hsize" "struct sockaddr *addr" "int addrlen"
75 to the corresponding host name.
76 This is done by resolving
78 to a host name and then ensuring that the host name resolves
83 must point to a buffer of at least
85 bytes, and will always be written to by this function.
87 If the name resolution does not work both ways or if the host name is longer
92 with NI_NUMERICHOST specified, is used to convert
96 If the string written to
102 will not be NUL terminated.
106 function will return one of the following constants which are defined in
109 .Bl -tag -width XXX -offset XXX
110 .It Li HOSTNAME_FOUND
111 A valid host name was found.
112 .It Li HOSTNAME_INCORRECTNAME
113 A host name was found, but it did not resolve back to the passed
116 now contains the numeric value of
118 .It Li HOSTNAME_INVALIDADDR
120 could not be resolved.
122 now contains the numeric value of
124 .It Li HOSTNAME_INVALIDNAME
125 A host name was found, but it could not be resolved back to any ip number.
127 now contains the numeric value of