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Top Forums Shell Programming and Scripting Reading command options one by one Post 302598547 by h0ujun on Tuesday 14th of February 2012 08:50:44 PM
Old 02-14-2012
Reading command options one by one

Hi,

Just some questions on the script below...?

Given: bash-2.03$ command -a option1 name1 name2
Code:
ParseOptions()
{
    local Len=${#@}
    local Ctr=2 #always start at 2
    local Name=()
    local Iter=0
    while [ $Ctr -lt $Len] ; do
        if [ $Ctr -eq "-a" ]            <- Is this correct? so I can get the $2 ("-a")
            Ctr=$(($Ctr + 1))
            local Option=$Ctr         <- Is this correct?
        else
            Name[$Iter]=$Ctr         <- Is this correct?
            Iter=$(($Iter + 1))
        fi
        Ctr=$(($Ctr + 1))
    done
}

Is there a better way to do this?
Note that the command may or may not have options, and the options can be interchanged (ex. bash-2.03$ command name3 -a option2)


also I need to check for this:
Code:
bash-2.03$ command name3 -a option2 name2

-> Should I make this an error?
kindly advise.


Thanks!

Last edited by Franklin52; 02-15-2012 at 03:32 AM.. Reason: Please use code tags for code and data samples, thank you
 

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SERVICE(8)						    BSD System Manager's Manual 						SERVICE(8)

NAME
service -- control (start/stop/etc.) or list system services SYNOPSIS
service -e service -R service [-v] -l | -r service [-v] <rc.d script> start|stop|etc. DESCRIPTION
The service command is an easy interface to the rc.d system. Its primary purpose is to start and stop services provided by the rc.d scripts. When used for this purpose it will set the same restricted environment that is in use at boot time (see below). It can also be used to list the scripts using various criteria. The options are as follows: -e List services that are enabled. The list of scripts to check is compiled using rcorder(8) the same way that it is done in rc(8), then that list of scripts is checked for an "rcvar" assignment. If present the script is checked to see if it is enabled. -R Restart all enabled local services. -l List all files in /etc/rc.d and the local startup directories. As described in rc.conf(5) this is usually /usr/local/etc/rc.d. All files will be listed whether they are an actual rc.d script or not. -r Generate the rcorder(8) as in -e above, but list all of the files, not just what is enabled. -v Be slightly more verbose ENVIRONMENT
When used to run rc.d scripts the service command sets HOME to / and PATH to /sbin:/bin:/usr/sbin:/usr/bin which is how they are set in /etc/rc at boot time. EXIT STATUS
The service utility exits 0 on success, and >0 if an error occurs. EXAMPLES
The following are examples of typical usage of the service command: service named status service -rv The following programmable completion entry can be use in bash(1) for the names of the rc.d scripts: _service () { local cur cur=${COMP_WORDS[COMP_CWORD]} COMPREPLY=( $( compgen -W '$( service -l )' -- $cur ) ) return 0 } complete -F _service service SEE ALSO
bash(1) (ports/shells/bash), rc.conf(5), rc(8), rcorder(8) HISTORY
The service utility first appeared in FreeBSD 7.3. AUTHORS
This manual page was written by Douglas Barton <dougb@FreeBSD.org>. BSD
December 11, 2012 BSD
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