Hello,

I have inherited some code that appends datestamps to file names. It is generating different results in perl 5.8.8 and perl 5.10.1 and I need some help trying to understand why.

Here's a snippet that shows the behavior: 
#!/usr/bin/perl

my @tm=localtime(time);
$year=@tm[5]+1900;
$mon=@tm[4]+1;
$dom=@tm[3];
if ($dom<10) { $dom="0$dom"; }

$dow=@tm[6];
$dstamp=sprintf("%04.0d%02.0d%02.0d",$year,$mon,$dom);
$hour=@tm[2];
$min=@tm[1];
$sec=@tm[0];
if ($hour<10) { $hour="0$hour"; }
if ($min<10)  { $min="0$min"; }
if ($sec<10)  { $sec="0$sec"; }
$dstime=$tm[8]; # is it currently daylight savings time.
$tstamp=sprintf("%02.0d%02.0d%02.0d",$hour,$min,$sec);

print "year is $year\n";
print "mon is $mon\n";
print "dom is $dom\n";
print "hour is $hour\n";
print "min is $min\n";
print "sec is $sec\n";

print "tstamp is $tstamp\n";

print "dstamp is $dstamp\n";

[download]
Here's the output running perl 5.8.8: 
year is 2014
mon is 4
dom is 11
hour is 16
min is 18
sec is 06
tstamp is 161806
dstamp is 20140411

[download]
And perl 5.10.1 
year is 2014
mon is 4
dom is 11
hour is 16
min is 20
sec is 08
tstamp is 1620 8
dstamp is 2014 411

[download]
The perl 5.10.1 output is putting spaces instead of zeros when the individual components of the timestamp are less than ten (like with the seconds field of the tstamp value).

Due to legacy systems, this code needs to continue to run on both versions of perl.

Any help understanding what caused the output to change or how to get the same output from both perl versions would be appreciated.

Thank you,
Tim

In reply to output format changed perl5.8 --> perl 5.10? by Anonymous Monk

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