Linux Commands: Parse positional parameters


getopts-Linux Command

getopts command- Parse positional parameters

Syntax: getopts optstring name [args]

Description: This powerful tool parses command-line arguments passed to the script. This is the Bash analog of the getopt external command and the getopt library function familiar to C programmers. It permits passing and concatenating multiple options [53] and associated arguments to a script (for example scriptname -abc -e /usr/local).
The getopts construct uses two implicit variables. $OPTIND is the argument pointer (OPTion INDex) and $OPTARG (OPTion ARGument) the (optional) argument attached to an option. A colon following the option name in the declaration tags that option as having an associated argument.
A getopts construct usually comes packaged in a while loop, which processes the options and arguments one at a time, then increments the implicit $OPTIND variable to step to the next.

Example:

Related: export, shift

Other Linux Commands:
alias , break , builtin , cal , case , cat , cd , cfdisk , chgrp , chmod , chown , chroot , cksum , cmp , comm , continue , cp , cron , crontab , csplit , cut , date , dc , dd , declare , df , diff , diff3 , dir , dircolors , dirname , dirs , du , echo , egrep , enable , env , eval , exec , expand , export , expr , factor , false , fdformat , fdisk , fgrep , find , fmt , fold , for , fsck , function , getopts , hash , hashcharacter , head , history , hostname , id , if , import , install , join , kill , less , let , ln , local , locate , logname , logout , lpc , lpr , lprm , ls , m4 , man , mbadblocks , mkdir , mkfifo , mknod , more , mount , mtools , mv , nice , nl , nohup , passwd , paste , period , popd , pr , printf , ps , pushd , pwd , quota , quotacheck , quotactl , ram , rcp , read , readonly , return , rm , rmdir , rsync , Run , sdiff , sed , select , seq , set , shift , shopt , shutdown , sleep , sort , split , su , sum , symlink , sync , tac , tail , tar , tee , Test , time , times , top , touch , tr , traceroute , true , tsort , tty , Type , ulimit , umask , uname , Unexpand , uniq , units , unset , unshar , until , useradd , usermod , users , uuencode , watch , wc , whereis , which , while , who , xargs , yes ,
Live2Support.com :
Product - Benefits - Features - How Does it Works - Pricing - SSL Certificates - Signup - Contactus - Login - Submit Resources