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 youre not running VMS, this module does nothing.
vmsish status |
This makes $?and systemreturn the native VMS exit status instead of emulating the POSIX exit status. |
vmsish exit |
This makes exit 1produce a successful exit (with status SS$_NORMAL), instead of emulating UNIX exit(), which considers exit 1to indicate an error. As with the CRTLs exit() function, exit 0is also mapped to an exit status of SS$_NORMAL, and any other argument to exit() is used directly as Perls exit status. |
vmsish time | This makes all times relative to the local time zone, instead of the default of Universal Time (a.k.a Greenwich Mean Time, or GMT). |
vmsish hushed |
This suppresses printing of VMS status messages to SYS$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 $STATUSwill still have the termination status, but with a high-order bit set: EXAMPLE: $ perl -eexit 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...Im 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. |