command line option: optarg - The UNIX and Linux Forums

		The UNIX and Linux Forums > Top Forums > High Level Programming
command line option: optarg

google unix.com

High Level Programming Post questions about C, C++, Java, SQL, and other programming languages here.

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Why does the 'ps' command with -u option not working?	ElCaito	SUN Solaris	4	02-26-2006 07:14 PM
Usage of optarg	sveera	Shell Programming and Scripting	5	07-19-2005 06:21 PM
option for ls command	eloquent99	UNIX for Dummies Questions & Answers	1	02-07-2003 06:27 PM
tar command with compress option...	tomapam	UNIX for Dummies Questions & Answers	3	10-11-2002 12:56 PM
-c option in ping command	Deepa	Shell Programming and Scripting	3	05-31-2002 06:05 AM

LinkBack

Thread Tools

Search this Thread

Rate Thread

Display Modes

#1 (permalink)

06-17-2009

Dedalus

Registered User

Join Date: May 2009

Location: Italy/France

Posts: 60

command line option: optarg

Hi

I'm learning how to add in programm another option by command line.
For example in the "my_prog" i want to add a " -k " option and then write a number.
I mean:

Code:

my_prog -k 50

and the i should use the number 50.
I'm reading about getopt_long and optarg, and what i have done in the code is to add k in the getop_long as:

Code:

c = getopt_long (*pargc, argv, "B:T:z:k:gpdht", long_options, &option_index)

and the k option in the switch as:

Code:

    case 'k':
      number_i_want = optarg;
      routine_that_use_number_i_want(number_i_want);
      break;

the program run but it doesn't work appropriately. I think the problem is in optarg that should point to a string.
Anyone can help?

Thanks

D.

-----Post Update-----

Sorry I got it.

All i have to do is translate the char to int with the atoi() function.

Code:

number_i_want=atoi(optarg)

Now seems like works!

D.

Last edited by otheus; 06-18-2009 at 08:42 AM..

Remove advertisements

Tags

command-line, getopt_long, optarg

« 2 Problems: Segfault on ctrl+c and syslog() prob | Not able to execute the method based on OS in JAVA »

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread:

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Trackbacks are On Pingbacks are On Refbacks are On

All times are GMT -4. The time now is 04:14 AM.

Bits Awarded / Charged to Dedalus for this Post
Date	User	Comment	Amount
06-18-2009	otheus	For solving own problem and posting it on the forum!	1,000