12-12-2009
How do I get at the modification date for a file as a variable for a script?
I realize this is basic and probably obvious, but I'm pulling my hair out. I'm guessing this is just some flag on the file command or somesuch, but I can't find it. Help me get unstuck please?
EDIT: I guess what I'm asking is once I've got the ls -l output for a file, what command do I use to take a specific part of that output (the modification date, or the group write permissions, for example) and somehow isolate or separate it so it can be compared to some other value?
1. The problem statement, all variables and given/known data:
Get the current date from the UNIX system and print a statement as to whether the file was created today or not.
2. Relevant commands, code, scripts, algorithms:
Wish I knew. All I really want to know is how to extract the modification date from a file in a form that can be plugged into an if/then statement. I can take it from there. I can pull the information up on screen with ls -l for all the files in a directory, I just can't figure out how to isolate it for one file so I can compare it to something else. The same goes for permissions, too.
3. The attempts at a solution (include all code and scripts):
Numerous references to the textbook's index and some use of Google.
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
McHenry County College, Crystal Lake, IL, USA, Diaz, CIS 143
Last edited by Timespike; 12-13-2009 at 12:21 AM..
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LEARN ABOUT CENTOS
dm_date
DM_DATE(1) User Contributed Perl Documentation DM_DATE(1)
NAME
dm_date - print out the system date and time
SYNOPSIS
This performs the same operation as the unix 'date' command, but using the Date::Manip module.
dm_date [OPTION]... [+FORMAT]
DESCRIPTION
This displays information about the current system time, or some other time. Options are:
-h, --help
Print online help.
-d STRING, --date=STRING
Display time described by STRING. STRING can be any string which can be parsed by Date::Manip. Please refer to the Date::Manip::Date
documentation for details.
-f DATEFILE, --file=DATEFILE
This reads each line in DATEFILE, and extracts a date from it and prints out the information.
Blank lines and lines starting with a pound (#) are ignored. Lines not containing a valid date are also ignored.
-r FILE, --reference=FILE
Displays the last modification time of FILE.
-R, --rfc-2822
Displayc the date and time in RFC 2822 format.
Example: Mon, 07 Aug 2006 12:34:56 -0600
-u, --utc, --universal
Converts the date to UT (GMT) and prints out the information.
Only one of -d, -f, or -r should be included. If more than one is included, the first one from the list (-d, -f, -r) is used and any other
is ignored.
The format string starts with a plus (+) and contains any of the format directives described in Date::Manip::Date.
KNOWN BUGS
None known.
BUGS AND QUESTIONS
Please refer to the Date::Manip::Problems documentation for information on submitting bug reports or questions to the author.
SEE ALSO
Date::Manip::Date
LICENSE
This script is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
AUTHOR
Sullivan Beck (sbeck@cpan.org)
perl v5.16.3 2014-06-09 DM_DATE(1)