Date: Wed, 7 May 1997 16:40:14 +0200 (MET DST) From: Zahemszky Gabor <zgabor@CoDe.hu> To: freebsd-questions@freebsd.org (FreeBSD questions) Cc: un_x@anchorage.net Subject: Re: getopts Message-ID: <199705071440.QAA00712@CoDe.hu> In-Reply-To: <Pine.BSF.3.95q.970506221747.18627B-100000@aak.anchorage.net> from Steve Howe at "May 6, 97 10:20:35 pm"
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>
> can anyone tell me what the purpose of the sh builtin "getopts"
> is? it doesn't seem to be as functional as the program
> getopt(1). why would i want to use it (getopts)?
> -------------------------------------------------------------------------
Because you cannot handle arguments with embedded spaces/tabs/newlines with
getopt, but can it with getopts. Another one: it's a builtin utility, not
an external, so a little bit more quick. Another one: POSIX.
--- getopt ---
set -- `getopt abc "$@"`
while [ $1 != '--' ] ; do
case "$1" in
-a) echo A option ;;
-b) echo B option ;;
-c) echo C option ;;
*) echo What is it?
esac
shift
done
echo $# "$@"
--- getopts ---
while getopts abc i ; do
case "$i" in
a) echo A option ;;
b) echo B option ;;
c) echo C option ;;
*) echo What is it? ;;
esac
done
shift $(( $OPTIND - 1 ))
echo $# "$@"
--- output ---
Script started on Wed May 7 16:35:06 1997
# ksh lo1 -a -b -c -d 'a b c'
getopt: illegal option -- d
A option
B option
C option
4 -- a b c
# ksh lo2 -a -b -c -d 'a b c'
A option
B option
C option
lo2: lo2[8]: -d: unknown option
What is it?
1 a b c
#
Script done on Wed May 7 16:35:41 1997
----
Bye, Gabor
--
#!/bin/ksh
Z='21N16I25C25E30, 40M30E33E25T15U!' ;IFS=' ABCDEFGHIJKLMNOPQRSTUVWXYZ ';set $Z;for i { [[ $i = ? ]]&&print $i&&break;[[ $i = ??? ]]&&j=$i&&i=${i%?};typeset -i40 i=8#$i;print -n ${i#???};[[ "$j" = ??? ]]&&print -n "${j#??} "&&j=;typeset +i i;};IFS=' 0123456789 ';set $Z;X=;for i { [[ $i = , ]]&&i=2;[[ $i = ?? ]]||typeset -l i;X="$X $i";typeset +l i;};print "$X"
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