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AMD.CONF(5)               FreeBSD File Formats Manual              AMD.CONF(5)

     amd.conf -- amd configuration file


     The amd.conf file is the configuration file for amd, as part of the am-
     utils suite.

     amd.conf contains runtime configuration information for the amd(8) auto-
     mounter program.

     The file consists of sections and parameters.  A section begins with the
     name of the section in square brackets and continues until the next sec-
     tion begins or the end of the file is reached.  Sections contain parame-
     ters of the form `name = value'.

     The file is line-based - that is, each newline-terminated line represents
     either a comment, a section name or a parameter.  No line-continuation
     syntax is available.

     Section, parameter names and their values are case sensitive.

     Only the first equals sign in a parameter is significant.  Whitespace
     before or after the first equals sign is discarded.  Leading, trailing
     and internal whitespace in section and parameter names is irrelevant.
     Leading and trailing whitespace in a parameter value is discarded.
     Internal whitespace within a parameter value is not allowed, unless the
     whole parameter value is quoted with double quotes as in `name =
     "some value"'.

     Any line beginning with a pound sign (#) is ignored, as are lines con-
     taining only whitespace.

     The values following the equals sign in parameters are all either a
     string (no quotes needed if string does not include spaces) or a boolean,
     which may be given as yes/no.  Case is significant in all values.  Some
     items such as cache timeouts are numeric.

   The [global] section
     Parameters in this section either apply to amd as a whole, or to all
     other regular map sections which follow.  There should be only one global
     section defined in one configuration file.

     It is highly recommended that this section be specified first in the con-
     figuration file.  If it is not, then regular map sections which precede
     it will not use global values defined later.

   Regular [/map] sections
     Parameters in regular (non-global) sections apply to a single map entry.
     For example, if the map section [/homes] is defined, then all parameters
     following it will be applied to the /homes amd-managed mount point.

   Parameters common to all sections
     These parameters can be specified either in the global or a map specific
     section.  Entries specified in a map-specific section override the
     default value or one defined in the global section.  If such a common
     parameter is specified only in the global section, it is applicable to
     all regular map sections that follow.

     browsable_dirs (string, default=no)
           If "yes", then amd's top-level mount points will be browsable to
           readdir(3) calls.  This means you could run for example ls(1) and
           see what keys are available to mount in that directory.  Not all
           entries are made visible to readdir(3): the "/default" entry, wild-
           card entries, and those with a "/" in them are not included.  If
           you specify "full" to this option, all but "/default" will be visi-
           ble.  Note that if you run a command which will attempt to stat(2)
           the entries, such as often done by "ls -l" or "ls -F", amd will
           attempt to mount every entry in that map.  This is often called a
           ``mount storm''.

     map_options (string, default no options)
           This option is the same as specifying map options on the command
           line to amd, such as `cache:=all'.

     map_type (string, default search all map types)
           If specified, amd will initialize the map only for the type given.
           This is useful to avoid the default map search type used by amd
           which takes longer and can have undesired side-effects such as ini-
           tializing NIS even if not used.  Possible values are:

           file     plain files
           hesiod   Hesiod name service from MIT
           ldap     Lightweight Directory Access Protocol
           ndbm     (New) dbm style hash files
           nis      Network Information Services (version 2)
           nisplus  Network Information Services Plus (version 3)
           passwd   local password files
           union    union maps

     mount_type (string, default=nfs)
           All amd mount types must be NFS.  That is, amd is an NFS server on
           the map mount points, for the local host it is running on.  If
           "autofs" is specified, amd will log an error and convert it to NFS.

     search_path (string, default no search path)
           This provides a (colon-delimited) search path for file maps.  Using
           a search path, sites can allow for local map customizations and
           overrides, and can query distributed maps in several locations as

   Parameters applicable to the global section only
     arch (string, default to compiled in value)
           Allows you to override the value of the arch amd variable.

     auto_dir (string, default=/a)
           Same as the -a option to amd.  This sets the private directory
           where amd will create sub-directories for its real mount points.

     cache_duration (numeric, default=300)
           Same as the -c option to amd.  Sets the duration in seconds that
           looked up map entries remain in the cache.

     cluster (string, default no cluster)
           Same as the -C option to amd.  Specifies the alternate HP-UX clus-
           ter to use.

     debug_options (string, default no debug options)
           Same as the -D option to amd.  Specify any debugging options for
           amd.  Works only if am-utils was configured for debugging using the
           --enable-debug option.  The "mem" option alone can be turned on via
           --enable-debug=mem.  Otherwise debugging options are ignored.
           Options are comma delimited, and can be preceded by the string "no"
           to negate their meaning.  You can get the list of supported debug-
           ging options by running amd -v.  Possible values are:

           all     all options
           amq     register for amq(8)
           daemon  enter daemon mode
           fork    fork server
           full    program trace
           info    info service specific debugging (hesiod, nis, etc.)
           mem     trace memory allocations
           mtab    use local ./mtab file
           str     debug string munging
           test    full debug but no daemon
           trace   protocol trace

     dismount_interval (numeric, default=120)
           Same as the -w option to amd.  Specify, in seconds, the time
           between attempts to dismount file systems that have exceeded their
           cached times.

     fully_qualified_hosts (string, default=no)
           If "yes", amd will perform RPC authentication using fully-qualified
           host names.  This is necessary for some systems, and especially
           when performing cross-domain mounting.  For this function to work,
           the amd variable ${hostd} is used, requiring that ${domain} not be

     hesiod_base (string, default=automount)
           Specify the base name for hesiod maps.

     karch (string, default to karch of the system)
           Same as the -k option to amd.  Allows you to override the kernel-
           architecture of your system.  Useful for example on Sun (Sparc)
           machines, where you can build one amd binary and run it on multiple
           machines, yet you want each one to get the correct karch variable
           set (for example, sun4c, sun4m, sun4u, etc.)  Note that if not
           specified, amd will use uname(3) to figure out the kernel architec-
           ture of the machine.

     ldap_base (string, default not set)
           Specify the base name for LDAP.

     ldap_cache_maxmem (numeric, default=131072)
           Specify the maximum memory amd should use to cache LDAP entries.

     ldap_cache_seconds (numeric, default=0)
           Specify the number of seconds to keep entries in the cache.

     ldap_hostports (string, default not set)
           Specify LDAP-specific values such as country and organization.

     local_domain (string, default no sub-domain)
           Same as the -d option to amd.  Specify the local domain name.  If
           this option is not given the domain name is determined from the
           hostname by removing the first component of the fully-qualified
           host name.

     log_file (string, default=/dev/stderr)
           Same as the -l option to amd.  Specify a file name to log amd
           events to.  If the string /dev/stderr is specified, amd will send
           its events to the standard error file descriptor.  IF the string
           syslog is given, amd will record its events with the system logger
           syslogd(8).  The default syslog facility used is LOG_DAEMON.  If
           you wish to change it, append its name to the log file name, delim-
           ited by a single colon.  For example, if logfile is the string
           "syslog:local7" then amd will log messages via syslog(3) using the
           LOG_LOCAL7 facility (if it exists on the system).

     log_options (string, default no logging options)
           Same as the -x option to amd.  Specify any logging options for amd.
           Options are comma delimited, and can be preceded by the string
           ``no'' to negate their meaning.  The ``debug'' logging option is
           only available if am-utils was configured with --enable-debug.  You
           can get the list of supported debugging and logging options by run-
           ning amd -H.  Possible values are:

           all      all messages
           debug    debug messages
           error    non-fatal system errors
           fatal    fatal errors
           info     information
           map      map errors
           stats    additional statistical information
           user     non-fatal user errors
           warn     warnings
           warning  warnings

     nfs_proto (string, default to trying version tcp then udp)
           By default, amd tries TCP and then UDP.  This option forces the
           overall NFS protocol used to TCP or UDP.  It overrides what is in
           the amd maps, and is useful when amd is compiled with NFSv3 support
           that may not be stable.  With this option you can turn off the com-
           plete usage of NFSv3 dynamically (without having to recompile amd)
           until such time as NFSv3 support is desired again.

     nfs_retransmit_counter (numeric, default=110)
           Same as the counter part of the -t interval.counter option to amd.
           Specifies the retransmit counter's value in tenths of seconds.

     nfs_retry_interval (numeric, default=8)
           Same as the interval part of the -t interval.counter option to amd.
           Specifies the NFS timeout interval, in tenths of seconds, between
           NFS/RPC retries (for UDP only).  This is the value that the kernel
           will use to communicate with amd.

           Amd relies on the kernel RPC retransmit mechanism to trigger mount
           retries.  The values of the nfs_retransmit_counter and the
           nfs_retry_interval parameters change the overall retry interval.
           Too long an interval gives poor interactive response; too short an
           interval causes excessive retries.

     nfs_allow_insecure_port (string, default=no).
           Normally amd will refuse requests coming from unprivileged ports
           (i.e.  ports >= 1024 on Unix systems), so that only privileged
           users and the kernel can send NFS requests to it.  However, some
           kernels (certain versions of Darwin, MacOS X, and Linux) have bugs
           that cause them to use unprivileged ports in certain situations,
           which causes amd to stop dead in its tracks.  This parameter allows
           amd to operate normally even on such systems, at the expense of a
           slight decrease in the security of its operations.  If you see mes-
           sages like "ignoring request from foo:1234, port not reserved" in
           your amd log, try enabling this parameter and give it another go.

     nfs_vers (numeric, default to trying version 3 then 2)
           By default, amd tries version 3 and then version 2.  This option
           forces the overall NFS protocol used to version 3 or 2.  It over-
           rides what is in the amd maps, and is useful when amd is compiled
           with NFSv3 support that may not be stable.  With this option you
           can turn off the complete usage of NFSv3 dynamically (without hav-
           ing to recompile amd) until such time as NFSv3 support is desired

     nis_domain (string, default to local NIS domain name)
           Same as the -y option to amd.  Specify an alternative NIS domain
           from which to fetch the NIS maps.  The default is the system domain
           name.  This option is ignored if NIS support is not available.

     normalize_hostnames (boolean, default=no)
           Same as the -n option to amd.  If ``yes'', then the name referred
           to by ${rhost} is normalized relative to the host database before
           being used.  The effect is to translate aliases into "official"

     os (string, default to compiled in value)
           Same as the -O option to amd.  Allows you to override the compiled-
           in name of the operating system.  Useful when the built-in name is
           not desired for backward compatibility reasons.  For example, if
           the build in name is ``sunos5'', you can override it to ``sos5'',
           and use older maps which were written with the latter in mind.

     osver (string, default to compiled in value)
           Same as the -o option to amd.  Override the compiled-in version
           number of the operating system.  Useful when the built in version
           is not desired for backward compatibility reasons.  For example, if
           the build in version is ``2.5.1'', you can override it to
           ``5.5.1'', and use older maps that were written with the latter in

     pid_file (string, default=/dev/stdout)
           Specify a file to store the process ID of the running daemon into.
           If not specified, amd will print its process id only the standard
           output.  Useful for killing amd after it had run.  Note that the
           PID of a running amd can also be retrieved via amq -p.  This file
           is used only if the print_pid option is on.

     plock (boolean, default=yes)
           Same as the -S option to amd.  If ``yes'', lock the running exe-
           cutable pages of amd into memory.  To improve amd's performance,
           systems that support the plock(3) call can lock the amd process
           into memory.  This way there is less chance it that the operating
           system will schedule, page out, and swap the amd process as needed.
           This improves amd's performance, at the cost of reserving the mem-
           ory used by the amd process (making it unavailable for other pro-

     portmap_program (numeric, default=300019)
           Specify an alternate Port-mapper RPC program number, other than the
           official number.  This is useful when running multiple amd pro-
           cesses.  For example, you can run another amd in ``test'' mode,
           without affecting the primary amd process in any way.  For safety
           reasons, the alternate program numbers that can be specified must
           be in the range 300019-300029, inclusive.  amq has an option -P
           which can be used to specify an alternate program number of an amd
           to contact.  In this way, amq can fully control any number of amd
           processes running on the same host.

     print_pid (boolean, default=no)
           Same as the -p option to amd.  If ``yes'', amd will print its
           process ID upon starting.

     print_version (boolean, default=no)
           Same as the -v option to amd, but the version prints and amd con-
           tinues to run.  If ``yes'', amd will print its version information
           string, which includes some configuration and compilation values.

     restart_mounts (boolean, default=no)
           Same as the -r option to amd.  If ``yes'', amd will scan the mount
           table to determine which file systems are currently mounted.  When-
           ever one of these would have been auto-mounted, amd inherits it.

     selectors_on_default (boolean, default=no)
           If ``yes'', then the /default entry of maps will be looked for and
           process any selectors before setting defaults for all other keys in
           that map.  Useful when you want to set different options for a com-
           plete map based on some parameters.  For example, you may want to
           better the NFS performance over slow slip-based networks as fol-

           /defaults \
               wire==slip-net;opts:=intr,rsize=1024,wsize=1024 \

     show_statfs_entries (boolean, default=no)
           If ``yes'', then all maps which are browsable will also show the
           number of entries (keys) they have when "df" runs.  (This is accom-
           plished by returning non-zero values to the statfs(2) system call.)

     unmount_on_exit (boolean, default=no)
           If ``yes'', then amd will attempt to unmount all file systems which
           it knows about.  Normally amd leaves all (esp.) NFS mounted file
           systems intact.  Note that amd does not know about file systems
           mounted before it starts up, unless the restart_mounts option or -r
           flag are used.

   Parameters applicable to regular map sections
     map_name (string, must be specified)
           Name of the map where the keys are located.

     tag (string, default no tag)
           Each map entry in the configuration file can be tagged.  If no tag
           is specified, that map section will always be processed by amd.  If
           it is specified, then amd will process the map if the -T option was
           given to amd, and the value given to that command-line option
           matches that in the map section.

     Here is a real amd configuration I use daily.

     [ global ]
     normalize_hostnames =    no
     print_pid =              no
     restart_mounts =         yes
     auto_dir =               /n
     log_file =               /var/log/amd
     log_options =            all
     #debug_options =         all
     plock =                  no
     selectors_on_default =   yes
     # config.guess picks up "sunos5" and I don't want to edit my maps yet
     os =                     sos5
     # if you print_version after setting up "os", it will show it.
     print_version =          no
     map_type =               file
     search_path =            /etc/amdmaps:/usr/lib/amd:/usr/local/AMD/lib
     browsable_dirs =         yes

     [ /u ]
     map_name =               amd.u

     [ /proj ]
     map_name =               amd.proj

     [ /src ]
     map_name =               amd.src

     [ /misc ]
     map_name =               amd.misc

     [ /import ]
     map_name =               amd.import

     [ /tftpboot/.amd ]
     tag =                    tftpboot
     map_name =               amd.tftpboot

     amd(8), amq(8)

     The amd utility first appeared in 4.4BSD.

     Erez Zadok <>, Department of Computer Science,
     Columbia University, New York, USA.

     Jan-Simon Pendry <>, Department of Computing, Imperial
     College, London, UK.

     Other authors and contributers to am-utils are listed in the AUTHORS file
     distributed with am-utils.

FreeBSD 6.2                      April 7, 1997                     FreeBSD 6.2


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