dtoc(1)
Name
dtoc − unpack objects from a DOTS file
Syntax
dtoc [ −f ] [ −p ] [[ object.dots ] directory ]
Description
The dtoc command unpacks the contents of a Data Object Transport Syntax (DOTS) file or standard input.
object.dots can be either a file name, or a minus sign (−). If a minus sign (−) is specified, or if no file name is present, dtoc reads from the standard input. If directory is specified, the contents of the DOTS input is unpacked and stored in the specified directory. If directory is not specified, the content of the DOTS input is unpacked into the current directory. The names of the files created are written to standard output.
A DOTS file may contain a data object which consists of more than one component. Therefore, it is possible that more than one output file may be generated. As the object is unpacked, duplicate file or directory names may be encountered. If a duplicate is encountered, a new output file is generated with a sequential number appended to its name. For example, if dtoc discovers an existing file foo.ddif during unpacking, foo.ddif.1 is created.
As an object is unpacked, the external references within each object component are updated. Because DOTS files may have originated from non-ULTRIX systems, names of components may be modified as components are unpacked. References to those renamed components are updated accordingly.
Options
−f Suppresses output of unpacked file names.
−p Causes only the name of the primary input file to be written to standard output.
Implementation
Standard Input
If a minus sign (−) is specified, or if no parameters are specified, standard input is read until a <CTRLD> or EOF (end of file) is read. It cannot be specified more than once. The contents of standard input must conform to the syntax of a single DOTS file.
Reconstitution Of Names
Object file names and file names of referenced components may be modified as objects are extracted or unpacked. If names are modified, the references in the unpacked objects are updated. The handling of names depends in part on the name-type of the object, as follows:
ULTRIX file names
Names are unmodified.
VMS file names
The set of rules is as follows:
Convert uppercase letters to lower case.
Convert dollar signs ($) to underscores (_) because dollar signs have meaning on ULTRIX systems.
Ignore disk volume and directory specifications, if they are present, because they are not likely to be meaningful on ULTRIX systems.
Append duplicate file names with a period and a unique number.
Leave all other characters alone.
Restrictions
A DOTS file is expected to contain only a single primary DDIF or DTIF object in this release. Any subsequent objects in the DOTS file are external references of the primary object.
Diagnostics
The exit status is 0 if all objects were unpacked successfully, and 1 if any of the objects could not be unpacked. Consult standard error to see what failed, and why.
If a nonexistent target directory is specified, dtoc returns error status.