Adding getopt tests.

tests/src/test_getopt.c

@@ -0,0 +1,87 @@
+/*
+ ============================================================================
+ Name        : test_getopt.c
+ Author      : martin.dvorak@mindforger.com
+ Copyright   : Apache 2.0
+ Description : A test
+ ============================================================================
+*/
+
+#include <stdio.h>     /* for printf */
+#include <stdlib.h>    /* for exit */
+#include <getopt.h>
+
+int main(int argc, char **argv)
+{
+	int c;
+	int digit_optind = 0;
+
+	while (1) {
+		int this_option_optind = optind ? optind : 1;
+		int option_index = 0;
+		static struct option long_options[] = {
+				{"add",     required_argument, 0,  0 },
+				{"append",  no_argument,       0,  0 },
+				{"delete",  required_argument, 0,  0 },
+				{"verbose", no_argument,       0,  0 },
+				{"create",  required_argument, 0, 'c'},
+				{"file",    required_argument, 0,  0 },
+				{0,         0,                 0,  0 }
+		};
+
+		c = getopt_long(argc, argv, "abc:d:012", long_options, &option_index);
+		if (c == -1)
+			break;
+
+
+		switch (c) {
+		case 0:
+			printf("option %s", long_options[option_index].name);
+			if (optarg)
+				printf(" with arg %s", optarg);
+			printf("\n");
+			break;
+
+		case '0':
+		case '1':
+		case '2':
+			if (digit_optind != 0 && digit_optind != this_option_optind)
+				printf("digits occur in two different argv-elements.\n");
+			digit_optind = this_option_optind;
+			printf("option %c\n", c);
+			break;
+
+		case 'a':
+			printf("option a\n");
+			break;
+
+		case 'b':
+			printf("option b\n");
+			break;
+
+		case 'c':
+			printf("option c with value '%s'\n", optarg);
+			break;
+
+		case 'd':
+			printf("option d with value '%s'\n", optarg);
+			break;
+
+		case '?':
+
+			break;
+
+		default:
+			printf("?? getopt returned character code 0%o ??\n", c);
+		}
+	}
+
+	if (optind < argc) {
+		printf("non-option ARGV-elements: ");
+		while (optind < argc)
+			printf("%s ", argv[optind++]);
+		printf("\n");
+	}
+
+	exit(EXIT_SUCCESS);
+}

tests/test_getopt.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+gcc ./src/test_getopt.c -o _getopt
+
+# eof