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Top Forums Shell Programming and Scripting comparing two decimal values in KSH Post 89772 by mschwage on Tuesday 15th of November 2005 05:36:04 PM
Old 11-15-2005
Comparing decimal numbers

Quote:
Originally Posted by nandinisagar
I am in the learning phase... Can't we compare decimals and can't we use -GE instead of >=. Please educate me
Sadly, the shell can't do it. Gladly, though, the shell along with its tools can! You have to think of shell programming as combining your bits and pieces into a whole that's greater than the sum of its parts.

That doesn't mean the shell isn't ugly and clumsy. It is. Even moreso than Perl. But it sure is convenient, and reasonably powerful!

Here's one way to do what you want:

curr_time = date +%h.%m
set_time=23.55

result=`echo "if ( $curr_time > $set_time) 1" | bc`

If [[ "$result" = 1 ]];
then
zip the file

fi
 

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VCONSOLE.CONF(5)                                                   vconsole.conf                                                  VCONSOLE.CONF(5)

NAME
vconsole.conf - configuration file for the virtual console SYNOPSIS
/etc/vconsole.conf DESCRIPTION
The /etc/vconsole.conf file configures the virtual console, i.e. keyboard mapping and console font. The basic file format of the vconsole.conf is a newline-separated list environment-like shell-compatible variable assignments. It is possible to source the configuration from shell scripts, however, beyond mere variable assignments no shell features are supported, allowing applications to read the file without implementing a shell compatible execution engine. Note that the kernel command line options vconsole.keymap=, vconsole.keymap.toggle=, vconsole.font=, vconsole.font.map=, vconsole.font.unimap= may be used to override the console settings at boot. Depending on the operating system other configuration files might be checked for configuration of the virtual console as well, however only as fallback. OPTIONS
The following options are understood: KEYMAP=, KEYMAP_TOGGLE= Configures the key mapping table of for they keyboard. KEYMAP= defaults to us if not set. The KEYMAP_TOGGLE= can be used to configured a second toggle keymap and is by default unset. FONT=, FONT_MAP=, FONT_UNIMAP= Configures the console font, the console map and the unicode font map. FONT= defaults to latarcyrheb-sun16. EXAMPLE
Example 1. German keyboard and console /etc/vconsole.conf: KEYMAP=de-latin1 FONT=latarcyrheb-sun16 SEE ALSO
systemd(1), loadkeys(1), setfont(8), locale.conf(5) AUTHOR
Lennart Poettering <lennart@poettering.net> Developer systemd 10/07/2013 VCONSOLE.CONF(5)
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