diff options
Diffstat (limited to 'lib/libc/net/resolver.3')
| -rw-r--r-- | lib/libc/net/resolver.3 | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/libc/net/resolver.3 b/lib/libc/net/resolver.3 index e35a545..c1a37b3 100644 --- a/lib/libc/net/resolver.3 +++ b/lib/libc/net/resolver.3 @@ -28,7 +28,7 @@ .\" @(#)resolver.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd November 4, 2006 +.Dd May 29, 2009 .Dt RESOLVER 3 .Os .Sh NAME @@ -401,6 +401,19 @@ function properly if the programmer attempts to declare his or her own .Va _res structure in an attempt to replace the per-thread version referred to by that macro. +.Pp +The following compile-time option can be specified to change the default +behavior of resolver routines when necessary. +.Bl -tag -width RES_ENFORCE_RFC1034 +.It Dv RES_ENFORCE_RFC1034 +If this symbol is defined during compile-time, +.Fn res_search +will enforce RFC 1034 check, namely, disallow using of underscore character +within host names. +This is used by the standard host lookup routines like +.Xr gethostbyname 3 . +For compatibility reasons this option is not enabled by default. +.El .Sh RETURN VALUES The .Fn res_init |
