projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| c4698cbb NW |
1 | /* Utility to accept --help and --version options as unobtrusively as possible. |
| 2 | Copyright (C) 1993 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This program is free software; you can redistribute it and/or modify | |
| 5 | it under the terms of the GNU General Public License as published by | |
| 6 | the Free Software Foundation; either version 2, or (at your option) | |
| 7 | any later version. | |
| 8 | ||
| 9 | This program is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | GNU General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU General Public License | |
| 15 | along with this program; if not, write to the Free Software | |
| 16 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| 17 | ||
| 18 | /* Jim Meyering (meyering@comco.com) */ | |
| 19 | ||
| 20 | #ifdef HAVE_CONFIG_H | |
| 21 | #if defined (CONFIG_BROKETS) | |
| 22 | /* We use <config.h> instead of "config.h" so that a compilation | |
| 23 | using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h | |
| 24 | (which it would do because it found this file in $srcdir). */ | |
| 25 | #include <config.h> | |
| 26 | #else | |
| 27 | #include "config.h" | |
| 28 | #endif | |
| 29 | #endif | |
| 30 | ||
| 31 | #include <stdio.h> | |
| 32 | #include <getopt.h> | |
| 33 | #include <sys/types.h> | |
| 34 | #include "system.h" | |
| 35 | #include "version.h" | |
| 36 | #include "long-options.h" | |
| 37 | ||
| 38 | static struct option const long_options[] = | |
| 39 | { | |
| 40 | {"help", no_argument, 0, 'h'}, | |
| 41 | {"version", no_argument, 0, 'v'}, | |
| 42 | {0, 0, 0, 0} | |
| 43 | }; | |
| 44 | ||
| 45 | /* Process long options --help and --version, but only if argc == 2. | |
| 46 | Be careful not to gobble up `--'. */ | |
| 47 | ||
| 48 | void | |
| 49 | parse_long_options (argc, argv, usage) | |
| 50 | int argc; | |
| 51 | char **argv; | |
| 52 | void (*usage)(); | |
| 53 | { | |
| 54 | int c; | |
| 55 | int saved_opterr; | |
| 56 | int saved_optind; | |
| 57 | ||
| 58 | saved_opterr = opterr; | |
| 59 | saved_optind = optind; | |
| 60 | ||
| 61 | /* Don't print an error message for unrecognized options. */ | |
| 62 | opterr = 0; | |
| 63 | ||
| 64 | if (argc == 2 | |
| 65 | && (c = getopt_long (argc, argv, "+", long_options, (int *) 0)) != EOF) | |
| 66 | { | |
| 67 | switch (c) | |
| 68 | { | |
| 69 | case 'h': | |
| 70 | usage (0); | |
| 71 | ||
| 72 | case 'v': | |
| 73 | printf ("%s\n", version_string); | |
| 74 | exit (0); | |
| 75 | ||
| 76 | default: | |
| 77 | /* Don't process any other long-named options. */ | |
| 78 | break; | |
| 79 | } | |
| 80 | } | |
| 81 | ||
| 82 | /* Restore previous value. */ | |
| 83 | opterr = saved_opterr; | |
| 84 | ||
| 85 | /* Restore optind in case it has advanced past a leading `--'. */ | |
| 86 | optind = saved_optind; | |
| 87 | } |