Re: getopt() library function options

[Steve Graegert <graegerts@gmail.com>]

On Thu, 03 Mar 2005 22:35:02 -0600, Fabio <fabio@crearium.com> wrote:
> Hello,
> 
> I am coding a small utility for system administrator. The following command line options will be accepted:
> 
> $apstat
> $apstat -t 1
> $apstat -n 1
> $apstat -t 2 -n 2
> $apstat -v
> $apstat -t 1 -v
> $apstat -v -t 1 -n 2
> 
> unaccepted command line options:
> 
> $apstat -t
> $apstat -n
> $apstat -t <<non integer value>>
> $apstat -n <<non integer value>>
> 
> I would like that know what would be the while() command that I have to call getopt() inside the case(), for example, I need all this:
> 
>     while ((c = getopt(argc, argv, ":abf:")) != -1) {
>         switch(c) {
>         case 'a':
>              printf("a is set\n");
>              break;
>         case 'b':
>              printf("b is set\n");
>              break;
>         case 'f':
>              filename = optarg;
>              printf("filename is %s\n", filename);
>              break;
>         case ':':
>              printf("-%c without filename\n", optopt);
>              break;
>         case '?':
>              printf("unknown arg %c\n", optopt);
>              break;
>         }
>     }
> 

Hi Fabio,

this is what I would try:

while ((c = getopt(argc, argv, "n:t:v")) != -1) {
	switch (c)
	{
	case 'n':
		n_flag = (int)strtoul(optarg, NULL, 0);
		break;
	case 't':
		t_flag = (int)strtoul(optarg, NULL, 0);
		break;
	case 'v':
		v_flag = true;
		break;
	default:
		return -1;      
	}
}

It's not tested though, but hopefully points you to the right direction.

-- 
Kind Regards

    \Steve