| # 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'" |
