Copyright (c) 2021 Florian Obser <florian@openbsd.org>
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.Dd $Mdocdate: January 3 2023 $ .Dt RESOLVD 8 .Os .Sh NAME .Nm resolvd .Nd a daemon to handle nameserver configuration .Sh SYNOPSIS .Nm .Op Fl dv .Sh DESCRIPTION .Nm handles the contents of
a /etc/resolv.conf , which contains details of the system's DNS nameservers, and is read by the resolver routines in the C library. Nameservers are learned from various sources, incorporated in a priority order, then user-edited information found in the pre-existing file is re-appended.
p .Nm checks whether .Xr unwind 8 is running and, if so, places a nameserver line at the top to cause local resolution:
p .Dl nameserver 127.0.0.1
p .Nm also monitors the routing socket for proposals learned by .Xr dhcpleased 8 , .Xr iked 8 , .Xr slaacd 8 , or network devices which natively learn DNS information such as .Xr sppp 4 or .Xr umb 4 . Proposals can be sent manually using the .Xr route 8 .Cm nameserver command. The proposals are added in priority order, but commented out if .Xr unwind 8 is running.
p After that, .Nm appends all user-edited lines found in the file.
p .Nm also notices if the
a /etc/resolv.conf file is edited, and will rewrite the file, re-blending the various pieces of information. It will also create
a /etc/resolv.conf if it does not exist or if it is empty.
p The options are as follows: l -tag -width Ds t Fl d Do not daemonize. If this option is specified, .Nm will run in the foreground and log to .Em stderr . t Fl v Produce more verbose output. .El .Sh SEE ALSO .Xr resolv.conf 5 , .Xr dhcpleased 8 , .Xr route 8 , .Xr slaacd 8 , .Xr unwind 8 .Sh HISTORY The .Nm program first appeared in .Ox 6.9 .