db man page on IRIX

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DB(7P)									DB(7P)

NAME
     db - local name service database

SYNOPSIS
     /var/ns/lib/libns_db.so

DESCRIPTION
     The db client library fetches name service data out of an db(3B) format
     database file on the local host.  This library is meant to be used only
     by the nsd(1M) daemon to efficiently access local name service data.

     The library /var/ns/lib/libns_db.so is opened by the nsd(1M) daemon when
     db is listed as the protocol for some map in a nsswitch.conf file.

     The library contains code to fetch data from a local db file and present
     it as lines from the configuration file from which it came.  The nsd
     daemon then presents that data in the filesystem mounted under /ns.

     Extended attributes in the nsswitch.conf file can be used to control the
     behavior of the db library.  Extended attributes are simply lists of
     key/value pairs attached to each object in the nsd filesystem.  The
     attributes supported in this library are:

     domain
	  This is the domainname given as a parameter to the remote name
	  server.  This attribute is typically inherited from the daemon
	  depending on the nsswitch.conf file that is being read.  Given the
	  configuration file /var/ns/domains/DOMAINNAME/nsswitch.conf the
	  attribute "domain" is set to DOMAINNAME.  This attribute controls
	  which file is used to supply the requested information.  Given a
	  domain DOMAINNAME the library would open the file
	  /var/ns/domains/DOMAINNAME/table.db.	If the domain attribute is
	  unset then the file /etc/table.db would be used.  See the
	  information about the table attribute below.	A client system can be
	  a member of multiple domains by including multiple instances of the
	  db keyword in the nsswitch.conf file like:
	       hosts: db(domain=engr) db(domain=corp)

     table
	  The table attribute is typically inherited from the daemon based on
	  the line from which this entry occurs in the nsswitch.conf file.  In
	  the above example the table attribute would be set to hosts.byname
	  or hosts.byaddr depending on the context of the request.  This
	  attribute is used as the file name containing the db data, with a
	  ".db" appended. For the hosts.byname map in the default domain the
	  file /etc/hosts.byname.db would be opened and searched.

     key  The key attribute is used to fetch the data from the db(3B) file.
	  It is set by the nsd(1M) daemon, and is used without alteration.

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DB(7P)									DB(7P)

     file The file attribute overrides the domain and table attributes to set
	  the name of the file to be opened.  If the file begins with a
	  leading '/' then that file is simply opened.	If not, then the
	  contents of this attribute are appended to the directory name --
	  either /etc/ for the default domain, or /var/ns/domains/DOMAINNAME/
	  when the domain attribute is set.

     db_hash
	  The db_hash attribute sets the hash type for a Berkeley db file.
	  The default is "btree".  The valid choices are btree, hash, and
	  recno.   See dbopen(3) for detail on these.

     null_extend_key
	  The null_extend_key attribute specifies that the null character
	  which terminates the key is really part of the key.  Some
	  applications (such as sendmail) have historically included the null
	  in the key so this attribute provides backward compatibility with
	  the old behavior.

SEE ALSO
     nsd(1M), dbopen(3), nsswitch.conf(4)
     IRIX Admin: Networking and Mail

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