xref: /onnv-gate/usr/src/cmd/perl/5.8.4/distrib/lib/ctime.pl (revision 0:68f95e015346)
1*0Sstevel@tonic-gate;# ctime.pl is a simple Perl emulation for the well known ctime(3C) function.
2*0Sstevel@tonic-gate#
3*0Sstevel@tonic-gate# This library is no longer being maintained, and is included for backward
4*0Sstevel@tonic-gate# compatibility with Perl 4 programs which may require it.
5*0Sstevel@tonic-gate#
6*0Sstevel@tonic-gate# In particular, this should not be used as an example of modern Perl
7*0Sstevel@tonic-gate# programming techniques.
8*0Sstevel@tonic-gate#
9*0Sstevel@tonic-gate# Suggested alternative: the POSIX ctime function
10*0Sstevel@tonic-gate;#
11*0Sstevel@tonic-gate;# Waldemar Kebsch, Federal Republic of Germany, November 1988
12*0Sstevel@tonic-gate;# kebsch.pad@nixpbe.UUCP
13*0Sstevel@tonic-gate;# Modified March 1990, Feb 1991 to properly handle timezones
14*0Sstevel@tonic-gate;#  $RCSfile: ctime.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:23:47 $
15*0Sstevel@tonic-gate;#   Marion Hakanson (hakanson@cse.ogi.edu)
16*0Sstevel@tonic-gate;#   Oregon Graduate Institute of Science and Technology
17*0Sstevel@tonic-gate;#
18*0Sstevel@tonic-gate;# usage:
19*0Sstevel@tonic-gate;#
20*0Sstevel@tonic-gate;#     #include <ctime.pl>          # see the -P and -I option in perl.man
21*0Sstevel@tonic-gate;#     $Date = &ctime(time);
22*0Sstevel@tonic-gate
23*0Sstevel@tonic-gateCONFIG: {
24*0Sstevel@tonic-gate    package ctime;
25*0Sstevel@tonic-gate
26*0Sstevel@tonic-gate    @DoW = ('Sun','Mon','Tue','Wed','Thu','Fri','Sat');
27*0Sstevel@tonic-gate    @MoY = ('Jan','Feb','Mar','Apr','May','Jun',
28*0Sstevel@tonic-gate	    'Jul','Aug','Sep','Oct','Nov','Dec');
29*0Sstevel@tonic-gate}
30*0Sstevel@tonic-gate
31*0Sstevel@tonic-gatesub ctime {
32*0Sstevel@tonic-gate    package ctime;
33*0Sstevel@tonic-gate
34*0Sstevel@tonic-gate    local($time) = @_;
35*0Sstevel@tonic-gate    local($[) = 0;
36*0Sstevel@tonic-gate    local($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst);
37*0Sstevel@tonic-gate
38*0Sstevel@tonic-gate    # Determine what time zone is in effect.
39*0Sstevel@tonic-gate    # Use GMT if TZ is defined as null, local time if TZ undefined.
40*0Sstevel@tonic-gate    # There's no portable way to find the system default timezone.
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate    $TZ = defined($ENV{'TZ'}) ? ( $ENV{'TZ'} ? $ENV{'TZ'} : 'GMT' ) : '';
43*0Sstevel@tonic-gate    ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) =
44*0Sstevel@tonic-gate        ($TZ eq 'GMT') ? gmtime($time) : localtime($time);
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate    # Hack to deal with 'PST8PDT' format of TZ
47*0Sstevel@tonic-gate    # Note that this can't deal with all the esoteric forms, but it
48*0Sstevel@tonic-gate    # does recognize the most common: [:]STDoff[DST[off][,rule]]
49*0Sstevel@tonic-gate
50*0Sstevel@tonic-gate    if($TZ=~/^([^:\d+\-,]{3,})([+-]?\d{1,2}(:\d{1,2}){0,2})([^\d+\-,]{3,})?/){
51*0Sstevel@tonic-gate        $TZ = $isdst ? $4 : $1;
52*0Sstevel@tonic-gate    }
53*0Sstevel@tonic-gate    $TZ .= ' ' unless $TZ eq '';
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate    $year += 1900;
56*0Sstevel@tonic-gate    sprintf("%s %s %2d %2d:%02d:%02d %s%4d\n",
57*0Sstevel@tonic-gate      $DoW[$wday], $MoY[$mon], $mday, $hour, $min, $sec, $TZ, $year);
58*0Sstevel@tonic-gate}
59*0Sstevel@tonic-gate1;
60