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Top Forums Shell Programming and Scripting Need help in finding in date difference Post 302672045 by methyl on Sunday 15th of July 2012 06:06:36 PM
Old 07-15-2012
@prasson_ibm
Just re-read the history of your posts and not managed to deduce what precise Operating System (an unknown vintage of IBM AIX?), or what Shell you use, or whether you have a modern version of Perl installed.

You posted a question nearly a year ago about date arithmetic which petered out because there was insufficient base information for anybody to post a solution to match your evolving requirement (only last post mentions the expected output format).

In the custom of this forum, please post the base information about your computer software, some representative sample input data which contains the date data, an explanation of the process, and the expected matching sample output data. Please mention the volume of data which needs to be processed and quote real numbers (i.e. not words like "huge").

Please do find out whether you have the BSD variant of the date command installed, and whether you have Perl installed (what version?), and whether you have ksh93 installed (unlikely with AIX but not impossible).

Last edited by methyl; 07-15-2012 at 07:10 PM.. Reason: grammar
 

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libapache2-mod-perl2-2.0.7::docs::api::APR::Date(3pm)	User Contributed Perl Documentation  libapache2-mod-perl2-2.0.7::docs::api::APR::Date(3pm)

NAME
APR::Date - Perl API for APR date manipulating functions Synopsis use APR::Date (); # parse HTTP-complient date string $date_string = 'Sun, 06 Nov 1994 08:49:37 GMT'; $date_parsed = APR::Date::parse_http($date_string); # parse RFC822-complient date string $date_string = 'Sun, 6 Nov 94 8:49:37 GMT'; $date_parsed = APR::Date::parse_rfc($date_string); Description "APR::Socket" provides the Perl interface to APR date manipulating functions. API
"APR::Date" provides the following functions and/or methods: "parse_http" Parse HTTP date strings $date_parsed = parse_http($date_string); arg1: $date_string ( string ) The date string can be in one of the following formats: Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123 Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036 Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format refer to RFC2616 for the details (GMT is assumed, regardless of the used timezone). ret: $date_parsed ( number ) the number of microseconds since 1 Jan 1970 GMT, or 0 if out of range or if the date is invalid. since: 2.0.00 Remember to divide the return value by 1_000_000 if you need it in seconds. "parse_rfc" Parse a string resembling an RFC 822 date. It's meant to be lenient in its parsing of dates. Hence, this will parse a wider range of dates than "parse_http()". $date_parsed = parse_rfc($date_string); arg1: $date_string ( string ) The date string can be in one of the following formats: Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123 Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036 Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format Sun, 6 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123 Sun, 06 Nov 94 08:49:37 GMT ; RFC 822 Sun, 6 Nov 94 08:49:37 GMT ; RFC 822 Sun, 06 Nov 94 08:49 GMT ; Unknown [drtr@ast.cam.ac.uk] Sun, 6 Nov 94 08:49 GMT ; Unknown [drtr@ast.cam.ac.uk] Sun, 06 Nov 94 8:49:37 GMT ; Unknown [Elm 70.85] Sun, 6 Nov 94 8:49:37 GMT ; Unknown [Elm 70.85] ret: $date_parsed ( number ) the number of microseconds since 1 Jan 1970 GMT, or 0 if out of range or if the date is invalid. since: 2.0.00 Remember to divide the return value by 1_000_000 if you need it in seconds. See Also mod_perl 2.0 documentation. Copyright mod_perl 2.0 and its core modules are copyrighted under The Apache Software License, Version 2.0. Authors The mod_perl development team and numerous contributors. perl v5.14.2 2011-02-08 libapache2-mod-perl2-2.0.7::docs::api::APR::Date(3pm)
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