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Full Discussion: case structure in .sh file
Top Forums Shell Programming and Scripting case structure in .sh file Post 302457600 by durden_tyler on Tuesday 28th of September 2010 10:58:14 AM
Old 09-28-2010
Quote:
Originally Posted by milink
...
while true
do
printf "$FBOLD\nPlease enter the minutes (0-59): $FREG"
read MIN

case "$MIN" in
[0-9]|[0-5][0-9]|s) break 2;;
*)
echo ""
echo "Invalid minutes, please try again.";;
esac

done

In the above case structure, if the user doesnt give any value (simply press enter) then, it should also accept.
...
Code:
$
$ cat f25.sh
#!/usr/bin/bash
while true
do
 printf "$FBOLD\nPlease enter the minutes (0-59): $FREG"
 read MIN
 case "$MIN" in
   [0-9]|[0-5][0-9]|s|"") break 2;;
   *)
     echo ""
     echo "Invalid minutes, please try again.";;
 esac
done
$

Add null string in your first case condition.

Code:
$
$ ./f25.sh
Please enter the minutes (0-59):
$
$

tyler_durden
 

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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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