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Full Discussion: comparing two dates.
Top Forums UNIX for Dummies Questions & Answers comparing two dates. Post 302333534 by fpmurphy on Monday 13th of July 2009 10:06:31 AM
Old 07-13-2009
Quote:
Thanks for you answer fpmurphy.

You code is working but i got little problem.
The printf command is not working for the T. So i have modified your command littel bit. See the command i have modified.

if (( $(printf "%s" "$toed") < $(printf "%s" "$shud") ))

toed and shud are the two variables which contains only date in the format 07/12/2009 and its working for date.
now i am storing two time values in the format 22:02:53. now i need to compare the times also. how do i full fill it.
Your "little bit" modification is invalid. You end up trying to numerically compare two strings. My example only works with Korn Shell 93 and requires the use of the %(%s)T syntax.
 

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PRINTF(1)							   User Commands							 PRINTF(1)

NAME
printf - format and print data SYNOPSIS
printf FORMAT [ARGUMENT]... printf OPTION DESCRIPTION
Print ARGUMENT(s) according to FORMAT, or execute according to OPTION: --help display this help and exit --version output version information and exit FORMAT controls the output as in C printf. Interpreted sequences are: " double quote NNN character with octal value NNN (1 to 3 digits) \ backslash a alert (BEL)  backspace c produce no further output f form feed new line carriage return horizontal tab v vertical tab xHH byte with hexadecimal value HH (1 to 2 digits) uHHHH Unicode (ISO/IEC 10646) character with hex value HHHH (4 digits) UHHHHHHHH Unicode character with hex value HHHHHHHH (8 digits) %% a single % %b ARGUMENT as a string with `' escapes interpreted, except that octal escapes are of the form or NNN and all C format specifications ending with one of diouxXfeEgGcs, with ARGUMENTs converted to proper type first. Variable widths are han- dled. NOTE: your shell may have its own version of printf, which usually supersedes the version described here. Please refer to your shell's documentation for details about the options it supports. AUTHOR
Written by David MacKenzie. REPORTING BUGS
Report printf bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> COPYRIGHT
Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
printf(3) The full documentation for printf is maintained as a Texinfo manual. If the info and printf programs are properly installed at your site, the command info coreutils 'printf invocation' should give you access to the complete manual. GNU coreutils 7.1 July 2010 PRINTF(1)
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