dtdtfile(4) UNIX System V (1 August 1995) dtdtfile(4)
NAME
dtdtfile - define the format and location of actions and
data type database files
SYNOPSIS
See dtactionfile(4) and dtdtsfile(4).
DESCRIPTION
The actions and data types database provides definitions for
the actions and data types CDE clients recognize. Files
containing actions and data type definitions must end with
the .dt suffix. The database is constructed by reading all
files ending in the .dt suffix that are found in the search
path specified by the DTDATABASESEARCHPATH environment
variable.
The dttypes(1) utility is the tool that allows users to
examine and debug their database.
The DTDATABASESEARCHPATH environment variable contains a
comma-separated list of directories specified in
[host:]/path format. The host: portion is optional, but if
specified, /path is interpreted relative to host. In
addition, host defines the DatabaseHost for records defined
by files in the /path directory. Otherwise, the
DatabaseHost is the same as the LocalHost. To allow for
localized action definitions, the data base search path
supports the string %L within the pathname string. The
logic that parses DTDATABASESEARCHPATH substitutes the value
of the current locale as stored in the LANG environment
variable for the string %L (or no characters if LANG is not
set). Other uses of % within the DTDATABASESEARCHPATH
pathnames produce unspecified results. Directories can be
set up for various locales. Each directory contains
localized action definitions for a single locale. For
examples, see the default search path shown below. The
local system administrator or the user (in $HOME/.dtprofile)
can modify the actual value of the search path. The default
search path includes the following directories, searched in
the following sequence:
$HOME/.dt/types/
personal user-defined database files
/etc/dt/appconfig/types/%L
locally defined language-specific database files
/etc/dt/appconfig/types/C
locally defined default database files
/usr/dt/appconfig/types/%L
language-specific database files
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/usr/dt/appconfig/types/C
implementation-default database files
File Format
In addition to the version information, comments and
variable references described under other headings in this
document, these files may contain action and data type
records, as described in dtactionfile(4) and dtdtsfile(4).
Comments
Any line whose first non-space character is # is treated as
a comment line, and is ignored during the reading of the
database file.
Database Version
The database loader supports a version number, which
indicates the version of the database syntax used by a
particular database file. If a database version number is
not specified, then the database loader assumes that the
file uses the version 1.0 syntax, described here. If a
database file specifies a version number, then it must be
the first non-blank, non-comment line in the database file;
if the version is specified anywhere else in the file, then
an error message is generated, and the remainder of that
database file is ignored. The database version number is
specified using the following syntax:
set DtDbVersion=version_number
String Variables
Database entries can reference string variables that can be
set within the database file. The scope of a string
variable is restricted to only those record definitions
within the database file defining the string variable. A
string variable is defined using the following syntax:
set VariableName=variable_value
String variables are referenced using either of the standard
shell variable referencing syntaxes: $variable_name or
${variable_name}. A variable name can be made up of any of
the alphanumeric characters and the underscore.
Environment Variables
Database records may refer to environment variables, using
either of the standard shell variable referencing syntaxes:
$environment_variable or ${environment_variable}. If the
environment variable name conflicts with a string variable
name, the string variable takes precedence.
Line Continuation
Any field within a record can be continued onto another line
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by ending the line with a \ character. The \ and any
<blank>s following the \ and preceding the newline are
discarded; leading <blank>s on the following line are
preserved in the continued field.
SEE ALSO
dtactionfile(4), dtdtsfile(4), dttypes(1).
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