Sponsored Content
Full Discussion: Date Validation in unix
Top Forums Shell Programming and Scripting Date Validation in unix Post 302396119 by linkslice on Wednesday 17th of February 2010 07:56:17 PM
Old 02-17-2010
Quote:
Originally Posted by pritish.sas
I have a script which is take date as parameter

sh abc.sh <2010-02-01>

#!/sh/bin

my_date=$1
#Here i want to two diffrent dates
## 3 Days before
##date14query=$mydate - 4 (it will be 2010-01-28)
##date24query=$mydate +4 (it will be 2010-01-05)

#Please Help
I've done this a bunch, but don't have anything handy. Usually I'd recommend you create a hash with the months and how many days they have (don't forget a special exception for leap years). Then just subtract the number you want from the current day, if that number is less than 1, add the negative number to the previously created hash with the number of the days in it and this will give you the difference.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Problem with Date validation

Hi All, I've to validate a date input for the format YYYYMMDD. The input should be of 8 digits with only numeric values. I tried the following echo $1 | grep '^\{8}$/p' if then echo "Valid" else echo "invalid" I get the error, grep: RE error 16: Bad number. Any help... (3 Replies)
Discussion started by: sumesh.abraham
3 Replies

2. Shell Programming and Scripting

Date Validation again

I want a sample Date validation script using if loops. The script should first compare "year".If the year is lesser than the current year,It should go for "month" checking. I have the script that splits the date into year,month and date.I want only the checking part. My if loop checking is not... (4 Replies)
Discussion started by: dave_nithis
4 Replies

3. Shell Programming and Scripting

Date Validation:

Hi I have below file with 3 rd column as date ....i want to make 3 column to mm/dd/yyyy . in the below file 2 row date is like 1/23/1994 so i want to append '0' to month i,e. 01/23/1994 and in the 3 row date is like 6/4/1994 ---so i want this to 06/04/1994 Source:... (1 Reply)
Discussion started by: satyam_sat
1 Replies

4. Shell Programming and Scripting

Basic date validation help

Hi, I've made a very basic date validation script, but the syntax of the until condtion is wrong, could someone have a quick look and correct it please?:) Thanks for any help. echo -n "Please enter your date of birth (dd-mm-yyyy): " read dob day=${dob:0:2} month=${dob:3:2} year=${dob:6:4}... (1 Reply)
Discussion started by: mustaine85
1 Replies

5. Shell Programming and Scripting

Date Validation

the user have to input the date format in mmddmmhhyyyy (month,date,minutes,hour,year) i want a shell script to check whether the user has properly input in the above said manner. kindly advice (2 Replies)
Discussion started by: vkca
2 Replies

6. Shell Programming and Scripting

Date validation

Hi, I have a script which runs on specific sunday. If that script runs on the sunday i want to execute another script on following wednesday. I have a log for that server. My wednesday scripts needs to check the sunday run log timestamp and if it matches it should run. Please help. Thanks,... (1 Reply)
Discussion started by: Krrishv
1 Replies

7. UNIX for Dummies Questions & Answers

Unix date validation

Dears, I am working on a batch that processes file with name containing date prefix eg., 20101222_file.dat. The logic is to process files in order. Eg., 20101225 must be processed only after 20101222. Ok first glance it looked simple, it use a variable to check this date value as number and... (2 Replies)
Discussion started by: naraink
2 Replies

8. Shell Programming and Scripting

Date validation

File contains below data,how to validate the date using awk command or any command. date formate is fixed as "YYYYMMDD" test1|20120405 test2|20121405 output should be: test1|20120405 Thanks (2 Replies)
Discussion started by: bmk
2 Replies

9. Shell Programming and Scripting

Validation of date from file name

I'm writing a shell script for cleanup of older files from various sub-directories inside a main directory The structure of directories is as below: Logs daily online archive weekly online archive... (1 Reply)
Discussion started by: asyed
1 Replies

10. What is on Your Mind?

Date validation

Hi folks, I new to shell script . I want to know how to validate a String as valid date example: 20150712 ---> valid date 20160524-->valid 201605T12-->invalid date 12341234--->invalid date we need to valid string( yyyymmdd) to date in SunOS 5.10 please give some idea to validate... (9 Replies)
Discussion started by: srinadhreddy27
9 Replies
Date::Parse(3)						User Contributed Perl Documentation					    Date::Parse(3)

NAME
Date::Parse - Parse date strings into time values SYNOPSIS
use Date::Parse; $time = str2time($date); ($ss,$mm,$hh,$day,$month,$year,$zone) = strptime($date); DESCRIPTION
"Date::Parse" provides two routines for parsing date strings into time values. str2time(DATE [, ZONE]) "str2time" parses "DATE" and returns a unix time value, or undef upon failure. "ZONE", if given, specifies the timezone to assume when parsing if the date string does not specify a timezone. strptime(DATE [, ZONE]) "strptime" takes the same arguments as str2time but returns an array of values "($ss,$mm,$hh,$day,$month,$year,$zone)". Elements are only defined if they could be extracted from the date string. The $zone element is the timezone offset in seconds from GMT. An empty array is returned upon failure. MULTI-LANGUAGE SUPPORT Date::Parse is capable of parsing dates in several languages, these include English, French, German and Italian. $lang = Date::Language->new('German'); $lang->str2time("25 Jun 1996 21:09:55 +0100"); EXAMPLE DATES
Below is a sample list of dates that are known to be parsable with Date::Parse 1995:01:24T09:08:17.1823213 ISO-8601 1995-01-24T09:08:17.1823213 Wed, 16 Jun 94 07:29:35 CST Comma and day name are optional Thu, 13 Oct 94 10:13:13 -0700 Wed, 9 Nov 1994 09:50:32 -0500 (EST) Text in ()'s will be ignored. 21 dec 17:05 Will be parsed in the current time zone 21-dec 17:05 21/dec 17:05 21/dec/93 17:05 1999 10:02:18 "GMT" 16 Nov 94 22:28:20 PST LIMITATION
Date::Parse uses Time::Local internally, so is limited to only parsing dates which result in valid values for Time::Local::timelocal. This generally means dates between 1901-12-17 00:00:00 GMT and 2038-01-16 23:59:59 GMT BUGS
When both the month and the date are specified in the date as numbers they are always parsed assuming that the month number comes before the date. This is the usual format used in American dates. The reason why it is like this and not dynamic is that it must be deterministic. Several people have suggested using the current locale, but this will not work as the date being parsed may not be in the format of the current locale. My plans to address this, which will be in a future release, is to allow the programmer to state what order they want these values parsed in. AUTHOR
Graham Barr <gbarr@pobox.com> COPYRIGHT
Copyright (c) 1995-2009 Graham Barr. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. POD ERRORS
Hey! The above document had some coding errors, which are explained below: Around line 325: You forgot a '=back' before '=head1' perl v5.16.2 2009-12-12 Date::Parse(3)
All times are GMT -4. The time now is 11:54 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy