Daftar Isi

• NAME
• SYNOPSIS
• DESCRIPTION

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 areassumed. 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 statusinstead of emulating the POSIX exit status.

• vmsish exit

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

• vmsish time

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

• vmsish hushed

  This suppresses printing of VMS status messages to SYS$OUTPUT andSYS$ERROR if Perl terminates with an error status, and allowsprograms that are expecting "unix-style" Perl to avoid having to parseVMS error messages. It does not suppress any messages from Perlitself, just the messages generated by DCL after Perl exits. The DCLsymbol $STATUS will still have the termination status, but with ahigh-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() ordie() commands that are compiled after 'vmsish hushed' will be hushedwhen they are executed. Doing a "no vmsish 'hushed'" turns off thehushed flag.

  The status of the hushed flag also affects output of VMS errormessages from compilation errors. Again, you still get the Perlerror 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-inroutine vmsish::hushed(). Without argument, it returns the hushed status.Since vmsish::hushed is built-in, you do not need to "use vmsish" to callit.

  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 "usevmsish" is not un-hushed by calling vmsish::hushed(0) at runtime.

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

See Perl Modules in perlmod.