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Full Discussion: Comparing two timestamps
Top Forums Shell Programming and Scripting Comparing two timestamps Post 302676069 by Jayaraman on Tuesday 24th of July 2012 03:58:58 AM
Old 07-24-2012
Comparing two timestamps

Hi all!!,

I'm using Ksh and working on Linux.

I want to compare two timestamps, timestamp1 and timestamp2.
Until, timestamp1 is lesser than timestamp2, i want to do something, lets say print something.

The code i have written is:

Code:
 
a=`date +%H:%M:%S`
b=`date +%H:%M:%S -d" 1 minute"`
echo $a
echo $b
while [ $a -le $b ];
do
echo "You have time"
a=`date +%H:%M:%S`
done

I tried executing this, but the output i get is :
Code:
 
03:55:57
03:56:57
date.sh: line 5: [: 03:55:57: integer expression expected

The problem is with the while loop condition.

Please help me on that.

Any help appreciated.
Thanks in advance!!
 

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SHTOOL-MOVE.TMP(1)					      GNU Portable Shell Tool						SHTOOL-MOVE.TMP(1)

NAME
shtool-move - GNU shtool enhanced mv(1) replacement SYNOPSIS
shtool move [-v|--verbose] [-t|--trace] [-e|--expand] [-p|--preserve] src-file dst-file DESCRIPTION
This is a mv(1) style command enhanced with the ability to rename multiple files in a single operation and the ability to detect and not touch existing equal destinations files, thus preserving timestamps. OPTIONS
The following command line options are available. -v, --verbose Display some processing information. -t, --trace Enable the output of the essential shell commands which are executed. -e, --expand Expand asterisk in src to be used as ""%"n" (where n is 1,2,...) in dst-file. This is useful for renaming multiple files at once. -p, --preserve Detect src-file and dst-file having equal content and not touch existing destination files, thus perserving timestamps. This is useful for applications that monitor timestamps, i.e. suppress make(1L) repeating actions for unchanged files. EXAMPLE
# shell script shtool move -v -e '*.txt' %1.asc # Makefile scanner.c: scanner.l lex scanner.l shtool move -t -p lex.yy.c scanner.c HISTORY
The GNU shtool move command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1999 for GNU shtool. SEE ALSO
shtool(1), mv(1), make(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-MOVE.TMP(1)
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