getopt.3

getopt.3

[Jonny Grant]

http://man7.org/linux/man-pages/man3/getopt.3.html

Hello

I noticed that "nsecs = 0;" is not needed in the getopt source code example.

GCC gives warning about this variable being initialised.

Regards, Jonny
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Re: getopt.3

[Michael Kerrisk (man-pages)]

Hello Jonny,

On 11 November 2014 at 23:27, Jonny Grant <jg-hus3n9K41k0@public.gmane.org> wrote:
> http://man7.org/linux/man-pages/man3/getopt.3.html
>
> Hello
>
> I noticed that "nsecs = 0;" is not needed in the getopt source code example.
>
> GCC gives warning about this variable being initialised.

But it is used:

           printf("flags=%d; tfnd=%d; nsecs=%d; optind=%d\n",
                   flags, tfnd, nsecs, optind)

Am I missing the point of your report?

Cheers,

Michael


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Re: getopt.3

[Jonny Grant]

On 05/05/15 15:10, Michael Kerrisk (man-pages) wrote:
> On 05/01/2015 12:10 AM, Jonny Grant wrote:
>> #include <unistd.h>
>> #include <stdlib.h>
>> #include <stdio.h>
>>
>> int
>>         main(int argc, char *argv[])
>> {
>>     int flags, opt;
>>     int nsecs, tfnd;
>>
>>     nsecs = 0;
>>     tfnd = 0;
>>     flags = 0;
>>     while ((opt = getopt(argc, argv, "nt:")) != -1) {
>>         switch (opt) {
>>         case 'n':
>>             flags = 1;
>>             break;
>>         case 't':
>>             nsecs = atoi(optarg);
>>             tfnd = 1;
>>             break;
>>         default: /* '?' */
>>             fprintf(stderr, "Usage: %s [-t nsecs] [-n] name\n",
>>                     argv[0]);
>>             exit(EXIT_FAILURE);
>>         }
>>     }
>>
>>      return 0;
>> }
>
> It looks like you are looking at a (very) old version
> of the page. That code does not match the example in
> the current man page.

Apologies, unsure where I got that old code from.
Latest code compiles ok for me too.
Regards, Jonny
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