Date: Sat, 5 Jun 2010 20:47:38 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Brandon Gooch <jamesbrandongooch@gmail.com> Cc: Aiza <aiza21@comclark.com>, "questions@freebsd.org" <questions@freebsd.org>, Robert Bonomi <bonomi@mail.r-bonomi.com> Subject: Re: .sh & getopts Message-ID: <20100606014737.GG85961@dan.emsphone.com> In-Reply-To: <AANLkTimDVOQE-SrT7YO4UD3tktD81jy8px6dbbB83-Dl@mail.gmail.com> References: <201006051513.o55FDCKj020952@mail.r-bonomi.com> <4C0ADBCF.8040506@comclark.com> <AANLkTimDVOQE-SrT7YO4UD3tktD81jy8px6dbbB83-Dl@mail.gmail.com>
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In the last episode (Jun 05), Brandon Gooch said:
> On Sat, Jun 5, 2010 at 6:20 PM, Aiza <aiza21@comclark.com> wrote:
> > Robert Bonomi wrote:
> >>> From: Aiza <aiza21@comclark.com>
> >>> Robert Bonomi wrote:
> >>>>> From: Aiza <aiza21@comclark.com>
> >>>>>
> >>>>> Have this code
> >>>>>
> >>>>> shift; while getopts :ugr: arg; do case ${arg} in
> >>>>> u) action="freebsd-update";;
> >>>>> g) action="freebsd-upgrade";;
> >>>>> r) action="freebsd-rollback";;
> >>>>> ?) exerr ${cmd_usage};;
> >>>>> esac; done; shift $(( ${OPTION} -1 ))
> >>>>>
> >
> > flag_count=0
> > shift; while getopts :ugr: arg; do
> > flag_count + 1;
> > case ${arg} in
> > u) action="freebsd-update";;
> > g) action="freebsd-upgrade";;
> > r) action="freebsd-rollback";;
> > ?) exerr ${cmd_usage};;
> > esac; done; shift $(( ${OPTION} -1 ))
> >
> >
> > if flag_count gt 3; then
> > exerr ${cmd_usage}
> > fi
> >
> >
> > I think I got the concept correct, but the flag_count + 1 is not correct. I
> > get "flag_count: not found" when I run it this way.
>
> You could use:
>
> flag_count=`expr $flag_count + 1`
/bin/sh can do math on its own:
flag_count=$((flag_count+1))
--
Dan Nelson
dnelson@allantgroup.com
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