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Top Forums UNIX for Advanced & Expert Users Regarding question for GNU date Post 302980661 by RavinderSingh13 on Wednesday 31st of August 2016 11:04:43 AM
Old 08-31-2016
Regarding question for GNU date

Hello All,

Greetings all !!

I have a query here, following are the points on same(Adding today's is 31st August 2016 for future reference).

1st Scenario: So while doing some work on GNU date, I wanted to check what was the month(in numbers) by GNU date so I have done following.
Code:
date -d"-2 months" +%m%d

Above gives me output as follows.
Code:
0701

2nd Scenario: When I check this in terms of days then following is the result.
Code:
date -d"-62 days" +%m%d
0630
AND
date -d"-61 days" +%m%d
0701

So after executing above scenarios I felt like if as a user I do -2 months with GNU date then it should ideally provide me month June, because when I do date -d"-3 months" +%m%d it shows me 0531.

So what is my observation is even we do -month option with GNU date in backend it will count by days only, if I am right here, so isn't it something kind of bug etc or it is expected behavior.

Will be grateful to all for your suggestions and advices here.

NOTE: testing it in BASH and version is date (GNU coreutils) 8.4.

Thanks,
R. Singh

Last edited by RavinderSingh13; 08-31-2016 at 12:44 PM..
 

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ARBITRON(8)						      System Manager's Manual						       ARBITRON(8)

 *

NAME
arbitron - arbitron mailboxes SYNOPSIS
arbitron [ -C config-file ] [ -o ] [ -u ] [ -l ] [ -p months ] [ -d days | -D mmddyyyy[:mmddyyyy] ] mailbox... DESCRIPTION
Arbitron collects and reports readership statistics for mailboxes on the server. It also optionally prunes the mailboxes of Seen state for dormant users. Arbitron produces one line of output per mailbox, reporting the mailbox name followed by a space, followed by the number of readers (and if -u is specified, followed by a colon and a comma-separated list of the readers userids), and if -o is not specified, another space and the number of subscribers (and if -u is specified, followed by a colon and a comma-separated list of the subscribers userids). IMPORTANT: This format is subject to change in future versions. Each "reader" is a distinct authentication identity which has "s" rights to the mailbox and which has SELECTed the mailbox within either the past days days or the specified date range. Users are not counted as reading their own personal mailboxes. Personal mailboxes are not reported unless there is at least one reader other than the mailboxes owner. Arbitron reads its configuration options out of the imapd.conf(5) file unless specified otherwise by -C. OPTIONS
-C config-file Read configuration options from config-file. -o "old way" -- do not report subscribers. -u Report userids in addition to the count(s). -l Enable long reporting (comma delimited table consisting of mbox, userid, r/s, start time, end time). -d days Count as a reader an authentication identity which has SELECTed the mailbox within days days. Default is 30. -D mmddyyyy[:mmddyyyy] Count as a reader an authentication identity which has SELECTed the mailbox within the given date range. The start date and optional end date are specified as 2-digit month of the year, 2-digit day of the month, and 4-digit year. If the end date is not specified, then the current system time is used as the end time. -p months Prune Seen state for users who have not SELECTed the mailbox within months months. Default is infinity. FILES
/etc/imapd.conf CMU
Project Cyrus ARBITRON(8)
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