| /* Parsing of Suboptions Example |
| 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/>. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| int do_all; |
| const char *type; |
| int read_size; |
| int write_size; |
| int read_only; |
| |
| enum |
| { |
| RO_OPTION = 0, |
| RW_OPTION, |
| READ_SIZE_OPTION, |
| WRITE_SIZE_OPTION, |
| THE_END |
| }; |
| |
| const char *mount_opts[] = |
| { |
| [RO_OPTION] = "ro", |
| [RW_OPTION] = "rw", |
| [READ_SIZE_OPTION] = "rsize", |
| [WRITE_SIZE_OPTION] = "wsize", |
| [THE_END] = NULL |
| }; |
| |
| int |
| main (int argc, char **argv) |
| { |
| char *subopts, *value; |
| int opt; |
| |
| while ((opt = getopt (argc, argv, "at:o:")) != -1) |
| switch (opt) |
| { |
| case 'a': |
| do_all = 1; |
| break; |
| case 't': |
| type = optarg; |
| break; |
| case 'o': |
| subopts = optarg; |
| while (*subopts != '\0') |
| switch (getsubopt (&subopts, mount_opts, &value)) |
| { |
| case RO_OPTION: |
| read_only = 1; |
| break; |
| case RW_OPTION: |
| read_only = 0; |
| break; |
| case READ_SIZE_OPTION: |
| if (value == NULL) |
| abort (); |
| read_size = atoi (value); |
| break; |
| case WRITE_SIZE_OPTION: |
| if (value == NULL) |
| abort (); |
| write_size = atoi (value); |
| break; |
| default: |
| /* Unknown suboption. */ |
| printf ("Unknown suboption `%s'\n", value); |
| break; |
| } |
| break; |
| default: |
| abort (); |
| } |
| |
| /* Do the real work. */ |
| |
| return 0; |
| } |