| #include <stdio.h> |
| #include <stdlib.h> |
| #include <getopt.h> |
| |
| /* Flag set by @samp{--verbose}. */ |
| static int verbose_flag; |
| |
| int |
| main (argc, argv) |
| int argc; |
| char **argv; |
| { |
| int c; |
| |
| while (1) |
| { |
| static struct option long_options[] = |
| { |
| /* These options set a flag. */ |
| {"verbose", no_argument, &verbose_flag, 1}, |
| {"brief", no_argument, &verbose_flag, 0}, |
| /* These options don't set a flag. |
| We distinguish them by their indices. */ |
| {"add", no_argument, 0, 'a'}, |
| {"append", no_argument, 0, 'b'}, |
| {"delete", required_argument, 0, 'd'}, |
| {"create", required_argument, 0, 'c'}, |
| {"file", required_argument, 0, 'f'}, |
| {0, 0, 0, 0} |
| }; |
| /* @code{getopt_long} stores the option index here. */ |
| int option_index = 0; |
| |
| c = getopt_long (argc, argv, "abc:d:f:", |
| long_options, &option_index); |
| |
| /* Detect the end of the options. */ |
| if (c == -1) |
| break; |
| |
| switch (c) |
| { |
| case 0: |
| /* If this option set a flag, do nothing else now. */ |
| if (long_options[option_index].flag != 0) |
| break; |
| printf ("option %s", long_options[option_index].name); |
| if (optarg) |
| printf (" with arg %s", optarg); |
| printf ("\n"); |
| break; |
| |
| case 'a': |
| puts ("option -a\n"); |
| break; |
| |
| case 'b': |
| puts ("option -b\n"); |
| break; |
| |
| case 'c': |
| printf ("option -c with value `%s'\n", optarg); |
| break; |
| |
| case 'd': |
| printf ("option -d with value `%s'\n", optarg); |
| break; |
| |
| case 'f': |
| printf ("option -f with value `%s'\n", optarg); |
| break; |
| |
| case '?': |
| /* @code{getopt_long} already printed an error message. */ |
| break; |
| |
| default: |
| abort (); |
| } |
| } |
| |
| /* Instead of reporting @samp{--verbose} |
| and @samp{--brief} as they are encountered, |
| we report the final status resulting from them. */ |
| if (verbose_flag) |
| puts ("verbose flag is set"); |
| |
| /* Print any remaining command line arguments (not options). */ |
| if (optind < argc) |
| { |
| printf ("non-option ARGV-elements: "); |
| while (optind < argc) |
| printf ("%s ", argv[optind++]); |
| putchar ('\n'); |
| } |
| |
| exit (0); |
| } |