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Full Discussion: Modulo calculation in shell script
Top Forums Shell Programming and Scripting Modulo calculation in shell script Post 302506506 by frans on Monday 21st of March 2011 04:08:09 AM
Old 03-21-2011
Could be written (with arithmetic evaluation and array)
bash code:
  1. #!/usr/bin/bash
  2. parity=(even odd) # parity[0]='even' parity[1]='odd'
  3. read -p "enter a number: " a
  4. echo "the number is ${parity[$((a%2))]}
This User Gave Thanks to frans For This Post:
fpmurphy
 

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LEARN ABOUT DEBIAN

parchive

PARCHIVE(1)							   User Commands						       PARCHIVE(1)

NAME

       parchive - RAID like data recovery for PAR ver 1.0 files

DESCRIPTION

       The  idea  behind  the parchive is to provide a tool to apply the data-recovery capability concepts of RAID-like systems to the posting and
       recovery of multi-part archives on Usenet. Current filespec and clients support the volumes for 'X' parity volumes present.

       The key to this mission is a clean file format specification which provides all the necessary capabilities for programs	to  easily  verify
       and regenerate single missing parts out of a set of archives.

       We might just be able to make binary posting and downloading on Usenet a little easier. That's a pretty cool goal!

       Note  that  parchive supports the old legacy version 1.0 PAR format.  For new projects, use the par2 package which supports the version 2.0
       PAR format which provides superior features.

       This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page.

USAGE

       parchive c(heck) [options] <par file>
	      Check parity archive

       parchive r(ecover) [options] <par file>
	      Restore missing volumes

       parchive a(dd) [options] <par file> [files]
	      Add files to parity archive

       parchive m(ix) [options]
	      Try to restore from all parity files at once

       parchive i(nteractive) [<par files>]
	      Interactive mode (very bare-bones)

       Options: (Can be turned off with '+')

       -m     Move existing files out of the way

       -f     Fix faulty filenames

       -p<n>  Number of files per parity volume

       -n<n>  Number of parity volumes to create

       -d     Search for duplicate files

       -k     Keep broken files

       -s     Be smart if filenames are consistently different.

       +i     Do not add following files to parity volumes

       +c     Do not create parity volumes

       +C     Ignore case in filename comparisons

       +H     Do not check control hashes

       -v,+v  Increase or decrease verbosity

       -h,-?  Display this help

       --     Always treat following arguments as files

SEE ALSO

       The  full  documentation  (such	as  it	is)  for  parchive  is	maintained  on	the  web   site   at   <http://sourceforge.net/docman/dis-
       play_doc.php?docid=7717&group_id=30568>

AUTHOR

       This  manual  page  was written by Rene Weber <rene_debmaint@elvenlord.com>, and edited by Vince Mulhollon <vlm@debian.org>, for the Debian
       GNU/Linux system (but may be used by others).

parchive 1.1							    May 30 2004 						       PARCHIVE(1)
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