ICL 1900 Series George 3 Operating System Commands

TRAPGO (TG)

Function

Permits a specified user to have access to an entrant that belongs to the proper user.

Format

TRAPGO entrant description, user name, access mode, access mode ...

There are five possible access modes, for an individual user:

EXECUTE The contents of the file may be loaded into core and run

READ The file contents may be read

APPEND Information may be written to the end of the file

WRITE The contents of the file may be overwritten

ERASE The file may be erased

In addition there is a GROUP mode, which applies the traps to a user group, rather than an individual user.

Forbidden contexts

NO USER

Execution

A user trap is set in the relevant entry of the proper user's directory. This contains the name of the user who is being allowed access to this entrant and indicators which specify the modes in which access is permitted.

If GROUP is included as a mode parameter, access will be granted to the named user and to all users inferior to him. A separate trap is set for the named user's group.

Examples

TRAPGO MYFILE,:JAMES,GROUP,ALL	:JAMES and all users inferior to him will be granted access to MYFILE as a GROUP in every mode
TRAPGO TAPEDATA(/230),WRITE	The proper user will be granted WRITE access to the named magnetic tape
TRAPGO :Z.F120,:FRED,READ,EXECUTE	:FRED will be granted READ and EXECUTE access to :Z.F120 :Z is a pseudo user whose directory belongs to the proper user

Error Messages

ENTRANT DESCRIPTION PARAMETER IS MISSING
TRAPMODE PARAMETER MISSING
YOU ARE NOT OWNER OF THIS ENTRANT
z IS A XENOTAPE AND MAY NOT BE REFERRED TO BY THIS COMMAND
UNRECOGNISED TRAPMODE PARAMETER
THIS USER IS A PSEUDO USER AND MAY NOT BE GIVEN TRAPS

	EXECUTE		The contents of the file may be loaded into core and run
	READ		The file contents may be read
	APPEND		Information may be written to the end of the file
	WRITE		The contents of the file may be overwritten
	ERASE		The file may be erased