| /* Example of Parsing Arguments with getopt. |
| Copyright (C) 1991-2014 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 2 |
| of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /*@group*/ |
| #include <ctype.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| int |
| main (int argc, char **argv) |
| { |
| int aflag = 0; |
| int bflag = 0; |
| char *cvalue = NULL; |
| int index; |
| int c; |
| |
| opterr = 0; |
| /*@end group*/ |
| |
| /*@group*/ |
| while ((c = getopt (argc, argv, "abc:")) != -1) |
| switch (c) |
| { |
| case 'a': |
| aflag = 1; |
| break; |
| case 'b': |
| bflag = 1; |
| break; |
| case 'c': |
| cvalue = optarg; |
| break; |
| case '?': |
| if (optopt == 'c') |
| fprintf (stderr, "Option -%c requires an argument.\n", optopt); |
| else if (isprint (optopt)) |
| fprintf (stderr, "Unknown option `-%c'.\n", optopt); |
| else |
| fprintf (stderr, |
| "Unknown option character `\\x%x'.\n", |
| optopt); |
| return 1; |
| default: |
| abort (); |
| } |
| /*@end group*/ |
| |
| /*@group*/ |
| printf ("aflag = %d, bflag = %d, cvalue = %s\n", |
| aflag, bflag, cvalue); |
| |
| for (index = optind; index < argc; index++) |
| printf ("Non-option argument %s\n", argv[index]); |
| return 0; |
| } |
| /*@end group*/ |