93 lines
1.5 KiB
Groff
93 lines
1.5 KiB
Groff
.Dd October 7, 2021
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.Dt DNSCONFIG 8
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.Os
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.Sh NAME
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.Nm dnsconfig
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.Nd configure kernel DNS resolver list
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.Sh SYNOPSIS
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.Nm
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.Nm
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.Ar resolver ...
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.Nm
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.Fl s
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.Op Ar resolver ...
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.Nm
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.Fl a
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.Op Ar resolver ...
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.Nm
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.Fl d
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.Op Ar resolver ...
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.Sh DESCRIPTION
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.Nm
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writes the current kernel DNS resolver list, or modifies it if any resolvers are
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specified.
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.Pp
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The options are as follows:
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.Bl -tag -width "12345678"
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.It Fl a
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Append resolvers to the list.
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.It Fl d
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Delete resolvers from the list.
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.It Fl s
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Set the resolver list.
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This option is the default if
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.Nm
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is invoked with any resolvers.
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.El
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.Sh EXIT STATUS
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.Nm
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will exit 0 on success and non-zero otherwise.
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.Sh EXAMPLES
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Get the resolvers:
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.Bd -literal
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$ dnsconfig
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192.0.2.1
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.Ed
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.Pp
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Set two resolvers:
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.Bd -literal
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# dnsconfig 192.0.2.15 192.0.2.100
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# dnsconfig
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192.0.2.15
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192.0.2.100
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.Ed
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.Pp
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Set the resolvers to the empty list:
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.Bd -literal
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# dnsconfig -s
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# dnsconfig
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.Ed
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.Pp
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Append a resolver:
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.Bd -literal
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# dnsconfig 192.0.2.128
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# dnsconfig -a 192.0.2.40
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# dnsconfig
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192.0.2.128
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192.0.2.40
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.Ed
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.Pp
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Delete a resolver:
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.Bd -literal
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# dnsconfig -d 192.0.2.128
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# dnsconfig
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192.0.2.40
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.Ed
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.Sh SEE ALSO
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.Xr getdnsconfig 2 ,
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.Xr setdnsconfig 2 ,
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.Xr inet 4 ,
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.Xr dhclient 8 ,
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.Xr ifconfig 8
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.Sh HISTORY
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.Nm
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originally appeared in Sortix 1.1.
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.Sh CAVEATS
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The kernel DNS resolver list is global state.
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Changes made with
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.Nm
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may be overwritten by other programs.
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In particular
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.Xr dhclient 8
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sets the resolver list automatically unless otherwise configured.
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