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Full Discussion: How can i split this.. :)?
Top Forums Shell Programming and Scripting How can i split this.. :)? Post 302989823 by bakunin on Wednesday 18th of January 2017 03:09:18 PM
Old 01-18-2017
Quote:
Originally Posted by RudiC
An array would be most suited to be assigned to, but sh doesn't have them.
This is right but you can pad by adding zeroes at the begin and then get the characters one at a time from right to left until you hit zero:

Code:
NUM=1
# NUM=12
# NUM=123

XNUM="00$NUM"

echo ${XNUM#${XNUM%?}}      # rightmost char
...etc.

(caution: not tested with a real Bourne shell as i do not have such a thing)

(addendum: if you use ksh (any ksh) you can typeset -RZ3 the variable and don't need the padding)

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
RudiC
 

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LEARN ABOUT CENTOS

sas_disk_blink

SAS_DISK_BLINK(8)						      SDPARM							 SAS_DISK_BLINK(8)

NAME

       sas_disk_blink - blink the LED on a SAS disk

SYNOPSIS

       sas_disk_blink [--help] [--set NUM] [--verbose] DEVICE

DESCRIPTION

       This  bash shell script attempts to blink the LED on the SAS disk referred to by DEVICE. By default the LED will blink for 30 seconds. This
       is meant to help identify which disk corresponds to a given DEVICE.

       The script use the sdparm utility and manipulates the "Ready LED Meaning" (RLM) field in the Protocol specific port mode page in  order	to
       blink the LED.

OPTIONS

       Arguments to long options are mandatory for short options as well.

       -h, --help
	      print out the usage message then exit.

       -s, --set NUM
	      when  NUM is 0 then the RLM field is cleared. When NUM is 1 then the RLM field is set. When NUM > 1 then the SAS disk LED is made to
	      blink for NUM seconds. If this option is not given then the SAS disk LED is made to blink for 30 seconds.

       -v, --verbose
	      increase level or verbosity.

EXIT STATUS

       The exit status of this script is 0 when it is successful. Otherwise the exit status is that of the last sdparm	utility  called.  See  the
       sdparm(8) man page.

AUTHORS

       Written by D. Gilbert

COPYRIGHT

       Copyright (C) 2013 Douglas Gilbert
       This  software  is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
       POSE.

SEE ALSO

       sdparm (sdparm)

sdparm-1.08							     May 2013							 SAS_DISK_BLINK(8)
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