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- # Open Group Base Specifications Issue 7:
- # """
- # If an unknown option is met, VAR shall be set to "?". In this case,
- # if the first character in optstring is ":", OPTARG shall be set
- # to the option character found, but no output shall be written
- # to standard error; otherwise, the shell variable OPTARG shall be
- # unset and a diagnostic message shall be written to standard error."
- # ...
- # If an option-argument is missing:
- # If the first character of optstring is ":", VAR shall be set to ":"
- # and OPTARG shall be set to the option character found.
- # """
- (
- echo "*** optstring:':ac' args:-a -b -c"
- getopts ":ac" var -a -b -c; echo "1 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
- getopts ":ac" var -a -b -c; echo "2 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
- getopts ":ac" var -a -b -c; echo "3 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
- getopts ":ac" var -a -b -c; echo "4 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
- # Previous line should result in "rc:1", which is normally treated
- # in getopts loops as exit condition.
- # Nevertheless, let's verify that calling it yet another time doesn't do
- # anything weird:
- getopts ":ac" var -a -b -c; echo "5 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
- ) 2>&1 \
- | sed -e 's/ unrecognized option: / invalid option -- /' \
- -e 's/ illegal option -- / invalid option -- /' \
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