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Full Discussion: getopts - optional and problem to display help
Top Forums Shell Programming and Scripting getopts - optional and problem to display help Post 302511563 by mirni on Thursday 7th of April 2011 05:18:12 AM
Old 04-07-2011
Do you have function 'help' defined at all?

Maybe you want something like this?
Code:
#!/bin/bash

help() {
    echo "I need some help"
}
rFlag=0;
fFlag=0;
while getopts :rfw:d:s:a: options
do
    case "$options" in
        r) [[ $(($rFlag + $fFlag)) -gt 0 ]] && echo "can't have both, baby" &&  exit 1 ; ((rFlag++)); echo reverse ;;
        f) [[ $(($rFlag + $fFlag)) -gt 0 ]] && echo "Don't be greedy" &&  exit 1 ; ((fFlag++)); echo forward ;;
        w) window=$OPTARG;;
        d) duration=$OPTARG;;
        s) search=$OPTARG;;
        a) value=$OPTARG;;
        *) help; exit;;
    esac
done
shift $((OPTIND-1))

echo "---------------"
echo window $window 
echo duration $duration 
echo search $search 
echo value $value

which can be called:
Code:
miro@miro-ntb:~$ ./test -f  -s someString -a aaaaaa
forward
---------------
window
duration
search someString
value aaaaaa
miro@miro-ntb:~$ ./test -ffff  -s someString -a aaaaaa
forward
Don't be greedy
miro@miro-ntb:~$ ./test -f -s someString -r -a aaaaaa
forward
can't have both, baby
miro@miro-ntb:~$ ./test -g -ffff  -s someString -a aaaaaa
I need some help

 

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LEARN ABOUT SUNOS

echo

echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME

       echo, noecho - enable/disable terminal echo

SYNOPSIS

       cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib 
       -R /usr/xpg4/lib -lcurses [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       int echo(void);

       int noecho(void);

DESCRIPTION

       The  echo()  function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially,
       curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control  soft-
       ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined.

RETURN VALUES

       Upon successful completion, these functions return OK. Otherwise, they return ERR.

ERRORS

       No errors are defined.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5)

SunOS 5.10							    5 Jun 2002							    echo(3XCURSES)
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