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vmsish(3)
NAME
  vmsish - Perl pragma to control VMS-specific language features

SYNOPSIS
      use vmsish;

      use vmsish 'status';	  # or '$?'
      use vmsish 'exit';
      use vmsish 'time';

      use vmsish 'hushed';
      no vmsish 'hushed';
      vmsish::hushed($hush);

      use vmsish;
      no vmsish 'time';

DESCRIPTION
  If no import list is supplied, all possible VMS-specific features are
  assumed.  Currently, there are four VMS-specific features available:
  'status' (a.k.a '$?'), 'exit', 'time' and 'hushed'.

  If you're not running VMS, this module does nothing.

  "vmsish status"
	This makes $? and "system" return the native VMS exit status instead
	of emulating the POSIX exit status.

  "vmsish exit"
	This makes "exit 1" produce a successful exit (with status
	SS$_NORMAL), instead of emulating UNIX exit(), which considers "exit
	1" to indicate an error.  As with the CRTL's exit() function, "exit
	0" is also mapped to an exit status of SS$_NORMAL, and any other
	argument to exit() is used directly as Perl's exit status.

  "vmsish time"
	This makes all times relative to the local time zone, instead of the
	default of Universal Time (a.k.a Greenwich Mean Time, or GMT).

  "vmsish hushed"
	This suppresses printing of VMS status messages to SYS$OUTPUT and
	SYS$ERROR if Perl terminates with an error status.  and allows
	programs that are expecting "unix-style" Perl to avoid having to
	parse VMS error messages.  It does not suppress any messages from
	Perl itself, just the messages generated by DCL after Perl exits.
	The DCL symbol $STATUS will still have the termination status, but
	with a high-order bit set:

	EXAMPLE:
	    $ perl -e"exit 44;"				    Non-hushed error
	exit
	    %SYSTEM-F-ABORT, abort			    DCL message
	    $ show sym $STATUS
	      $STATUS == "%X0000002C"

	    $ perl -e"use vmsish qw(hushed); exit 44;"	    Hushed error exit
	    $ show sym $STATUS
	      $STATUS == "%X1000002C"

	The 'hushed' flag has a global scope during compilation: the exit()
	or die() commands that are compiled after 'vmsish hushed' will be
	hushed when they are executed.	Doing a "no vmsish 'hushed'" turns
	off the hushed flag.

	The status of the hushed flag also affects output of VMS error
	messages from compilation errors.   Again, you still get the Perl
	error message (and the code in $STATUS)

	EXAMPLE:
	    use vmsish 'hushed';    # turn on hushed flag
	    use Carp;	       # Carp compiled hushed
	    exit 44;	       # will be hushed
	    croak('I die');    # will be hushed
	    no vmsish 'hushed';	    # turn off hushed flag
	    exit 44;	       # will not be hushed
	    croak('I die2'):   # WILL be hushed, croak was compiled hushed

	You can also control the 'hushed' flag at run-time, using the built-
	in routine vmsish::hushed().  Without argument, it returns the hushed
	status.	 Since vmsish::hushed is built-in, you do not need to "use
	vmsish" to call it.

	EXAMPLE:
	    if ($quiet_exit) {
		vmsish::hushed(1);
	    }
	    print "Sssshhhh...I'm hushed...\n" if vmsish::hushed();
	    exit 44;

	Note that an exit() or die() that is compiled 'hushed' because of
	"use vmsish" is not un-hushed by calling vmsish::hushed(0) at
	runtime.

	The messages from error exits from inside the Perl core are generally
	more serious, and are not suppressed.

  See "Pragmatic Modules" in perlmod.

Index for Section 3

Alphabetical listing for V

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