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https://github.com/ibm-s390-linux/s390-tools.git
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b627b8d8e1
This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
/*
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* util_opt_example - Example program for util_opt
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*
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* Copyright IBM Corp. 2016, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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//! [code]
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#include <stdio.h>
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#include <stdlib.h>
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#include "lib/util_opt.h"
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#define OPT_NOSHORT 256
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/*
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* Define the command line options
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*/
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static struct util_opt opt_vec[] = {
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UTIL_OPT_SECTION("OPTION WITHOUT ARGUMENTS"),
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/* Our own options */
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{
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.option = { "single", no_argument, NULL, 's'},
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.desc = "A single option without an argument",
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},
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UTIL_OPT_SECTION("OPTIONS WITH ARGUMENTS"),
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{
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.option = { "req_arg", required_argument, NULL, 'r'},
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.argument = "REQ_ARG",
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.desc = "Option with a required argument REQ_ARG",
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},
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{
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/*
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* NOTE: For specifying an optional parameter OPT_ARG use
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* either "-oOPT_ARG" or "--opt_arg=OPT_ARG" on the commandline.
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* Specifying "-o OPT_ARG" or "--opt_arg OPT_ARG" will not work.
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*/
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.option = { "opt_arg", optional_argument, NULL, 'o'},
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.argument = "OPT_ARG",
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.desc = "Option with an optional argument OPT_ARG. " \
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"We don't recommend using this feature.",
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},
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UTIL_OPT_SECTION("OPTION WITHOUT SHORT OPTION"),
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{
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.option = { "noshort", no_argument, NULL, OPT_NOSHORT},
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.desc = "Option with only a long name",
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.flags = UTIL_OPT_FLAG_NOSHORT,
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},
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UTIL_OPT_SECTION("OPTION WITHOUT LONG OPTION"),
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{
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.option = { NULL, no_argument, NULL, 'l'},
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.desc = "Option with only a short name",
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.flags = UTIL_OPT_FLAG_NOLONG,
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},
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UTIL_OPT_SECTION("OPTION WITH MANUALLY FORMATTED DESCRIPTION"),
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{
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.option = { "manual", no_argument, NULL, 'm' },
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.desc = "Option descriptions can be formatted\n" \
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"using the new line character '\\n' to:\n" \
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" - Display descriptions more meaningful\n" \
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" - Create lists within the description",
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},
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UTIL_OPT_SECTION("STANDARD OPTIONS"),
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/* Standard option: -h,--help */
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UTIL_OPT_HELP,
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/* Standard option: -v,--version */
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UTIL_OPT_VERSION,
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/* End-marker for option vector */
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UTIL_OPT_END
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};
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/*
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* Parse the command line options with util_opt functions
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*/
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int main(int argc, char *argv[])
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{
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int c;
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/* Install option vector */
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util_opt_init(opt_vec, NULL);
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/* Parse all options specified in argv[] */
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while (1) {
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/* Get the next option 'c' from argv[] */
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c = util_opt_getopt_long(argc, argv);
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/* No more options on command line? */
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if (c == -1)
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break;
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/* Find the right action for option 'c' */
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switch (c) {
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case 'h':
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util_opt_print_help();
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return EXIT_SUCCESS;
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case 'v':
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printf("Specified: --version\n");
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return EXIT_SUCCESS;
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case 's':
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printf("Specified: --single\n");
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break;
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case 'o':
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if (optarg != NULL)
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printf("Specified: --opt_arg %s\n", optarg);
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else
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printf("Specified: --opt_arg [without arg]\n");
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break;
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case 'r':
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printf("Specified: --req_arg %s\n", optarg);
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break;
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case OPT_NOSHORT:
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printf("Specified: --noshort\n");
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break;
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default:
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util_opt_print_parse_error(c, argv);
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return EXIT_FAILURE;
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}
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}
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return EXIT_SUCCESS;
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}
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//! [code]
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