Date in filename

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: Date in filename by Russ (Deacon) on Jul 24, 2001 at 23:58 UTC
How about POSIX::strftime? `use POSIX; open FH, '>'.strftime('%Y%m%d', localtime) or die "Nope: $!";` [download] Russ Brainbench 'Most Valuable Professional' for Perl	[reply] [d/l]
Re: Re: Date in filename by Anonymous Monk on Jul 25, 2001 at 17:05 UTC
Thanks Russ. You rock!	[reply]
Re: Date in filename by lhoward (Vicar) on Jul 24, 2001 at 23:59 UTC
One method of many..... `use POSIX; my $filename=POSIX::strftime("%Y%m%d",localtime(time()))."_foo.dat"; open F,">$filename" or die "error opening $filename : $!"; ...` [download]	[reply] [d/l]
Re: Re: Date in filename by Anonymous Monk on Jul 25, 2001 at 17:06 UTC
Thanks lhoward. Most appreciated!	[reply]
Re: Date in filename by dsb (Chaplain) on Jul 25, 2001 at 00:41 UTC
If you are worried about uniqueness in the filename, you are probably better of using the UNIX timestamp. `$file = time() . "whatever.ext";` [download] The `time` function returns the UNIX time in seconds since the epoch. Using this method also prevents spaces from being in the filename that would be there if you used `localtime`. Might want to take a look at perlfunc. Amel - f.k.a. - kel	[reply] [d/l]
Re: Re: Date in filename by alfie (Pilgrim) on Jul 25, 2001 at 17:19 UTC
If you are really searching for a uniqe filename, you should quite propably add `$$` (the process-ID) to it, to be on the save side. So you can have multiple programs running at the same time that do not interfere: `$file = time()."-$$.tmp";` [download] HTH! -- use signature; signature(" So long\nAlfie");	[reply] [d/l] [select]
Re: Re: Date in filename by Anonymous Monk on Jul 25, 2001 at 17:06 UTC
Thanks Amel. This is actually better than what I wanted. I'm gonna use it!	[reply]