[C] getopt

Hey guys.

Does anyone have a simple tutorial for using getopt?
Thank you!

Anon.

>>1
RTFM
http://www.gnu.org/s/libc/manual/html_node/Example-of-Getopt.html#Example-of-Getopt

http://linux.die.net/man/3/getopt
scroll down to ,,Example''.

you're kidding? .......right?

>>1,3-4
SPAWHBTC

I need something with optional arguments.

>>6
1/10

Dear >>1-san, please feel free to make use of this function so that you can just have you options defined in the option and not have to maintain a separate string for short opts. For this though you'll get a short opt for every long opt, and some other shit which I cant remember. Like how stuff is returned.

/* creates optstring arg (short opts) from option struct  */
char *mkoptstr(struct option *opt) {
  int n = 0;
  char *optstring,*p;
  struct option *o = opt;
  while(o->name || o->has_arg || o->flag || o->val) {
    n += 1 + o->has_arg;
    if(o->flag)
      return NULL; /* fail because not returning o->val */
    o++;
  }
  p = optstring = malloc(n+1);
  o = opt;
  while(o->name || o->has_arg || o->flag || o->val) {
    *p++ = o->val;
    n = o->has_arg;
    while(n--)
      *p++ = ':';
    o++;
  }
  *p = 0;
  return optstring;
}

^{Back to /b/, ``GNAA Faggot''}

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