lib/perl5/5.6.1/ctime.pl

   1 ;# ctime.pl is a simple Perl emulation for the well known ctime(3C) function.
   2 #
   3 # This library is no longer being maintained, and is included for backward
   4 # compatibility with Perl 4 programs which may require it.
   5 #
   6 # In particular, this should not be used as an example of modern Perl
   7 # programming techniques.
   8 #
   9 # Suggested alternative: the POSIX ctime function
  10 ;#
  11 ;# Waldemar Kebsch, Federal Republic of Germany, November 1988
  12 ;# kebsch.pad@nixpbe.UUCP
  13 ;# Modified March 1990, Feb 1991 to properly handle timezones
  14 ;#  $RCSfile: ctime.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:23:47 $
  15 ;#   Marion Hakanson (hakanson@cse.ogi.edu)
  16 ;#   Oregon Graduate Institute of Science and Technology
  17 ;#
  18 ;# usage:
  19 ;#
  20 ;#     #include <ctime.pl>          # see the -P and -I option in perl.man
  21 ;#     $Date = &ctime(time);
  22
  23 CONFIG: {
  24     package ctime;
  25
  26     @DoW = ('Sun','Mon','Tue','Wed','Thu','Fri','Sat');
  27     @MoY = ('Jan','Feb','Mar','Apr','May','Jun',
  28             'Jul','Aug','Sep','Oct','Nov','Dec');
  29 }
  30
  31 sub ctime {
  32     package ctime;
  33
  34     local($time) = @_;
  35     local($[) = 0;
  36     local($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst);
  37
  38     # Determine what time zone is in effect.
  39     # Use GMT if TZ is defined as null, local time if TZ undefined.
  40     # There's no portable way to find the system default timezone.
  41
  42     $TZ = defined($ENV{'TZ'}) ? ( $ENV{'TZ'} ? $ENV{'TZ'} : 'GMT' ) : '';
  43     ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) =
  44         ($TZ eq 'GMT') ? gmtime($time) : localtime($time);
  45
  46     # Hack to deal with 'PST8PDT' format of TZ
  47     # Note that this can't deal with all the esoteric forms, but it
  48     # does recognize the most common: [:]STDoff[DST[off][,rule]]
  49
  50     if($TZ=~/^([^:\d+\-,]{3,})([+-]?\d{1,2}(:\d{1,2}){0,2})([^\d+\-,]{3,})?/){
  51         $TZ = $isdst ? $4 : $1;
  52     }
  53     $TZ .= ' ' unless $TZ eq '';
  54
  55     $year += 1900;
  56     sprintf("%s %s %2d %2d:%02d:%02d %s%4d\n",
  57       $DoW[$wday], $MoY[$mon], $mday, $hour, $min, $sec, $TZ, $year);
  58 }
  59 1;