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712433d7f9
The util_opt_example allows to specify '-l' and '-m, --manual' options, but does not handle them. This leads to error message 'PANIC: The application terminated due to an unrecoverable error' with 'Option 'l' should not be handled here' and the program is aborted. Add the required case statements in the switch to handle those options. Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
129 lines
3.1 KiB
C
129 lines
3.1 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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case 'l':
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printf("Specified: -l\n");
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break;
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case 'm':
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printf("Specified: --manual\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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