Handling Command Line Args in C

handle_args.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

//#include <curl/curl.h>

#define URL_BASE "http://someurl.cc/"
#define URL_1M   URL_BASE "file_1M.bin"
#define URL_2M   URL_BASE "file_2M.bin"
#define URL_5M   URL_BASE "file_5M.bin"
#define URL_10M  URL_BASE "file_10M.bin"
#define URL_20M  URL_BASE "file_20M.bin"
#define URL_50M  URL_BASE "file_50M.bin"
#define URL_100M URL_BASE "file_100M.bin"

#define CHKSPEED_VERSION "1.0"

int main(int argc, char **argv){
  int prtall = 0, prtsep = 0, prttime = 0;
  const char *url = URL_1M;
  char *appname = argv[0];

  if(argc > 1) {
    /* parse input parameters */
    for(argc--, argv++; *argv; argc--, argv++) {
      if(strncasecmp(*argv, "-", 1) == 0) {
        if(strncasecmp(*argv, "-H", 2) == 0) {
          fprintf(stderr,
                  "\rUsage: %s [-m=1|2|5|10|20|50|100] [-t] [-x] [url]\n",
                  appname);
          exit(1);
        }
        else if(strncasecmp(*argv, "-V", 2) == 0) {
          fprintf(stderr, "\r%s %s - %s\n",
                  appname, CHKSPEED_VERSION, "curl_version");
          exit(1);
        }
        else if(strncasecmp(*argv, "-A", 2) == 0) {
          prtall = 1;
        }
        else if(strncasecmp(*argv, "-A", 2) == 0) {                                                                                         
          prtall = 1;
        }
        else if(strncasecmp(*argv, "-X", 2) == 0) {
          prtsep = 1;
        }
        else if(strncasecmp(*argv, "-T", 2) == 0) {
          prttime = 1;
        }
        else if(strncasecmp(*argv, "-M=", 3) == 0) {
          long m = strtol((*argv) + 3, NULL, 10);
          switch(m) {
          case 1:
            url = URL_1M;
            break;
          case 2:
            url = URL_2M;
            break;
          case 5:
            url = URL_5M;
            break;
          case 10:
            url = URL_10M;
            break;
          case 20:
            url = URL_20M;
            break;
          case 50:
            url = URL_50M;
            break;
          case 100:
            url = URL_100M;
            break;
          default:
            fprintf(stderr, "\r%s: invalid parameter %s\n",
                    appname, *argv + 3);
            exit(1);
          }
        }
        else {
          fprintf(stderr, "\r%s: invalid or unknown option %s\n",
                  appname, *argv);
          exit(1);
        }
      }
      else {
        url = *argv;
      }
    }
  }
  /* print separator line */
  if(prtsep) {
    printf("-------------------------------------------------\n");
  }
  /* print localtime */
  if(prttime) {
    time_t t = time(NULL);
    printf("Localtime: %s", ctime(&t));
  }
  //CURL stuff follows
}