FAQ 5.26 How do I get a file's timestamp in perl?
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From: PerlFAQ Server on 15 Apr 2010 00:00 This is an excerpt from the latest version perlfaq5.pod, which comes with the standard Perl distribution. These postings aim to reduce the number of repeated questions as well as allow the community to review and update the answers. The latest version of the complete perlfaq is at http://faq.perl.org . -------------------------------------------------------------------- 5.26: How do I get a file's timestamp in perl? If you want to retrieve the time at which the file was last read, written, or had its meta-data (owner, etc) changed, you use the -A, -M, or -C file test operations as documented in perlfunc. These retrieve the age of the file (measured against the start-time of your program) in days as a floating point number. Some platforms may not have all of these times. See perlport for details. To retrieve the "raw" time in seconds since the epoch, you would call the stat function, then use "localtime()", "gmtime()", or "POSIX::strftime()" to convert this into human-readable form. Here's an example: my $write_secs = (stat($file))[9]; printf "file %s updated at %s\n", $file, scalar localtime($write_secs); If you prefer something more legible, use the File::stat module (part of the standard distribution in version 5.004 and later): # error checking left as an exercise for reader. use File::stat; use Time::localtime; my $date_string = ctime(stat($file)->mtime); print "file $file updated at $date_string\n"; The POSIX::strftime() approach has the benefit of being, in theory, independent of the current locale. See perllocale for details. -------------------------------------------------------------------- The perlfaq-workers, a group of volunteers, maintain the perlfaq. They are not necessarily experts in every domain where Perl might show up, so please include as much information as possible and relevant in any corrections. The perlfaq-workers also don't have access to every operating system or platform, so please include relevant details for corrections to examples that do not work on particular platforms. Working code is greatly appreciated. If you'd like to help maintain the perlfaq, see the details in perlfaq.pod. |