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Full Discussion: time arithmetic
Top Forums UNIX for Advanced & Expert Users time arithmetic Post 11057 by csong2 on Wednesday 28th of November 2001 10:17:55 AM
Old 11-28-2001
Data time arithmetic

Can anyone help please. I am writing a kourne shell script and I am unsure how to do the following:

I have extracted a time string from a logfile, and I have another time string I want to compare it to to see if it's later than the time I'm comparing with.

i.e. expectedSLA="23:00:00", actualDeliveryTime="22:40:00"

I try to do the following:

missedSLA="N"
if [ $actualDeliveryTime > $expectedSLA ]
then
missedSLA="Y"
fi

This always sets missedSLA to "Y". Isn't it supposed to compare using the decimal values of the string? How can I get the above process to work? What can I do? Any help would be greatly appreciated.

Many thanks,
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
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