Beginning Linux Programming

Speakers : Neil Matthew and Richard Stones

Example getopt

#include <stdio.h>

  #include <unistd.h>

  int main(int argc, char *argv[])

  {

    int opt;

    while((opt = getopt(argc, argv, "if:lr")) != -1) {

      switch(opt) {

        case 'i': 

        case 'l':

        case 'r':

          printf("Option: %c\n", opt);

          break;

        case 'f':

          printf("Filename: %s\n", optarg);

          break;

        case ':':

          printf("Option needs a value\n");

          break;

        case '?':

          printf("Unknown option: %c\n", optopt);

          break;

      }

    }

    for(;optind < argc;optind++) 

      printf("Argument: %s\n", argv[optind]);

    exit(0);

 }

Back  |  Index  |  Next