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Top Forums Shell Programming and Scripting Can we get Tuesday's date of the current week in UNIX Post 302836783 by Corona688 on Wednesday 24th of July 2013 04:53:06 PM
Old 07-24-2013
Quote:
Originally Posted by rajeevm
I am using Korn shell script . It would be great if I can get using awk or sed
It's not a text replacement problem. What if yesterday was last month? How many days was last month again? Is it always the same number of days? What date corresponds to what day of the week? Etc, etc, etc. It's not trivial. Just call something that knows what a date is.

It's possible to do this in some versions of awk. Finding out which one you have will be a game of 20 questions since you don't want to tell us what your system is.

It's possible to do this in some versions of ksh. Finding out which one you have will be a game of 20 questions since you don't want to tell us what your system is.

It's possible to do this in some versions of the date utility. Finding out which one you have will be a game of 20 questions since you don't want to tell us what your system is.

It's possible to do this in any standard installation of Perl. I don't need to know what your system is.

I posted perl because it works in more places than everything else. Anything else depends on having the exact right version of the exact right shell, the exact right version of the exact right nawk, or having a new enough version of the GNU date utility.

I can turn the perl into a one-liner you can embed in ksh or whatever...
Code:
perl -e 'use POSIX qw(strftime);  print strftime("%Y%m%d\n", localtime(time() - ((strftime("%u",localtime)-2) * 86400)));'

Quote:
I tried using awk its not working
What did you try? In what way is it "not working"?

Last edited by Corona688; 07-24-2013 at 06:09 PM..
 

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Data::Faker::DateTime(3pm)				User Contributed Perl Documentation				Data::Faker::DateTime(3pm)

NAME
Data::Faker::DateTime - Data::Faker plugin SYNOPSIS AND USAGE
See Data::Faker DATA PROVIDERS
unixtime Return a unix time (seconds since the epoch) for a random time between the epoch and now. date Return a random date as a string, using a random date format (see date_format). time Return a random time as a string, using a random time format (see time_format). rfc822 Return an RFC 822 formatted random date. This method may not work on systems using a non-GNU strftime implementation (kindly let me know if that is the case.) ampm Returns am or pm randomly (in the current locale) using one of the formats specified in ampm_format. time_format Return a random time format. date_format Return a random date format. ampm_format Return a random am/pm format. datetime_format Return a random date and time format. month Return a random month name, unabbreviated, in the current locale. month_abbr Return a random month name, abbreviated, in the current locale. weekday Return a random weekday name, unabbreviated, in the current locale. weekday_abbr Return a random weekday name, abbreviated, in the current locale. sqldate Return a random date in the ISO8601 format commonly used by SQL servers (YYYY-MM-DD). datetime_locale Return a datetime string in the preferred date representation for the current locale, for a random date. date_locale Return a date string in the preferred date representation for the current locale, for a random date. time_locale Return a time string in the preferred date representation for the current locale, for a random date. century Return a random century number. dayofmonth Return a random day of the month. UTILITY METHODS
Data::Faker::DateTime::timestr($format); Given a strftime format specifier, this method passes it through to POSIX::strftime along with a random date to display in that format. Perl passes this through to the strftime function of your system library, so it is possible that some of the formatting tokens used here will not work on your system. NOTES AND CAVEATS
Be careful build timestamps from pieces Be very careful about building date/time representations in formats that are not already listed here. For example if you wanted to get a date that consists of just the month and day, you should NOT do this: my $faker = Data::Faker->new(); print join(' ',$faker->month,$faker->dayofmonth)." "; This is bad because you might end up with 'February 31' for example. Instead you should use the timestr utility function to provide you a formatted time for a valid date, or better still, write a plugin function that does it: my $faker = Data::Faker->new(); print $faker->my_short_date()." "; package Data::Faker::MyExtras; use base qw(Data::Faker); use Data::Faker::DateTime; __PACKAGE__->register_plugin( my_short_date => sub { Data::Faker::DateTime::timestr('%M %e') }, ); POSIX::strftime See the documentation above regarding the timestr utility method for some caveats related to strftime and your system library. SEE ALSO
Data::Faker AUTHOR
Jason Kohles, <email@jasonkohles.com> COPYRIGHT AND LICENSE
Copyright 2004-2005 by Jason Kohles This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.10.1 2005-07-14 Data::Faker::DateTime(3pm)
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