GNU Info

(am-utils.info)Location Format

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Enter node , (file) or (file)node

Location Format
===============

   The value field from the lookup provides the information required to
mount a filesystem.  The information is parsed according to the syntax
shown below.

     location-list:
                       location-selection
                       location-list white-space || white-space location-selection
     location-selection:
                       location
                       location-selection white-space location
     location:
                       location-info
                       -location-info
                       -
     location-info:
                       sel-or-opt
                       location-info;sel-or-opt
                       ;
     sel-or-opt:
                       selection
                       opt-ass
     selection:
                       selector==value
                       selector!=value
     opt-ass:
                       option:=value
     white-space:
                       space
                       tab

   Note that unquoted whitespace is not allowed in a location
description.  White space is only allowed, and is mandatory, where
shown with non-terminal white-space.

   A "location-selection" is a list of possible volumes with which to
satisfy the request.  "location-selection"s are separated by the `||'
operator.  The effect of this operator is to prevent use of
location-selections to its right if any of the location-selections on
its left were selected whether or not any of them were successfully
mounted (Note: Selectors).

   The location-selection, and singleton "location-list",
`type:=ufs;dev:=/dev/xd1g' would inform Amd to mount a UFS filesystem
from the block special device `/dev/xd1g'.

   The "sel-or-opt" component is either the name of an option required
by a specific filesystem, or it is the name of a built-in, predefined
selector such as the architecture type.  The value may be quoted with
double quotes `"', for example `type:="ufs";dev:="/dev/xd1g"'.  These
quotes are stripped when the value is parsed and there is no way to get
a double quote into a value field.  Double quotes are used to get white
space into a value field, which is needed for the program filesystem
(Note: Program Filesystem).

Map Defaults

Variable Expansion

Selectors

Map Options