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Diffstat (limited to 'usr.bin/dnsquery/dnsquery.1')
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diff --git a/usr.bin/dnsquery/dnsquery.1 b/usr.bin/dnsquery/dnsquery.1 new file mode 100644 index 0000000..ff147f0 --- /dev/null +++ b/usr.bin/dnsquery/dnsquery.1 @@ -0,0 +1,164 @@ +.TH DNSQUERY 1 "10 March 1990" +.UC 6 +.SH NAME +dnsquery \- query domain name servers using resolver +.SH SYNOPSIS +.B dnsquery +[-n +.I nameserver] +[-t +.I type] +[-c +.I class] +[-r +.I retry] +[-p +.I retry period] +[-d] [-s] [-v] host +.SH DESCRIPTION +The +.IR dnsquery +program is a general interface to nameservers via +BIND resolver library calls. The program supports +queries to the nameserver with an opcode of QUERY. +This program is intended to be a replacement or +supplement to programs like nstest, nsquery and +nslookup. All arguments except for +.IR host +and +.IR ns +are treated without case-sensitivity. +.SH OPTIONS +.TP 1i +.B \-n +The nameserver to be used in the query. Nameservers can appear as either +Internet addresses of the form w.x.y.z or can appear as domain names. +(default: as specified in /etc/resolv.conf) +.TP 1i +.B \-t +The type of resource record of interest. Types include: +.RS 1.5i +.TP 1i +A +address +.PD 0 +.TP 1i +NS +nameserver +.TP 1i +CNAME +canonical name +.TP 1i +PTR +domain name pointer +.TP 1i +SOA +start of authority +.TP 1i +WKS +well-known service +.TP 1i +HINFO +host information +.TP 1i +MINFO +mailbox information +.TP 1i +MX +mail exchange +.TP 1i +RP +responsible person +.TP 1i +MG +mail group member +.TP 1i +AFSDB +DCE or AFS server +.TP 1i +ANY +wildcard +.RE +.PD +.IP +Note that any case may be used. (default: ANY) +.TP 1i +.B \-c +The class of resource records of interest. +Classes include: +.RS 2i +.TP 1i +IN +Internet +.PD 0 +.TP 1i +HS +Hesiod +.TP 1i +CHAOS +Chaos +.TP 1i +ANY +wildcard +.RE +.PD +.IP +Note that any case may be used. (default: IN) +.TP 1i +.B \-r +The number of times to retry if the nameserver is +not responding. (default: 4) +.TP 1i +.B \-p +Period to wait before timing out. (default: RES_TIMEOUT) +.IR options +field. (default: any answer) +.TP 1i +.B \-d +Turn on debugging. This sets the RES_DEBUG bit of the resolver's +.IR options +field. (default: no debugging) +.TP 1i +.B \-s +Use a +.IR stream +rather than a packet. This uses a TCP stream connection with +the nameserver rather than a UDP datagram. This sets the +RES_USEVC bit of the resolver's +.IR options +field. (default: UDP) +.TP 1i +.B \-v +Synonym for the 's' flag. +.TP 1i +.B host +The name of the host (or domain) of interest. +.SH FILES +/etc/resolv.conf to get the default ns and search lists +.br +<arpa/nameser.h> list of usable RR types and classes +.br +<resolv.h> list of resolver flags +.SH "SEE ALSO" +nslookup(8), nstest(1), nsquery(1), +named(8), resolver(5) +.SH DIAGNOSTICS +If the resolver fails to answer the query and debugging has not been +turned on, +.IR dnsquery +will simply print a message like: +.TP 1i +Query failed (rc = 1) : Unknown host +.LP +The value of the return code is supplied by h_errno. +.SH BUGS +Queries of a class other than IN can have interesting results +since ordinarily a nameserver only has a list of root nameservers +for class IN resource records. +.PP +Query uses a call to inet_addr() to determine if the argument +for the '-n' option is a valid Internet address. Unfortunately, +inet_addr() seems to cause a segmentation fault with some (bad) +addresses (e.g. 1.2.3.4.5). +.SH AUTHOR +Bryan Beecher |
