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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
4 *
5 * Portions of these tests were inspired by glibc's posix/bug-getopt1.c and
6 * posix/tst-getopt-cancel.c
7 */
8
9#include <getopt.h>
10#include <test/lib.h>
11#include <test/test.h>
12#include <test/ut.h>
13
14static int do_test_getopt(struct unit_test_state *uts, int line,
15 struct getopt_state *gs, const char *optstring,
16 int args, char *argv[], int expected_count,
17 int expected[])
18{
19 int opt;
20
21 getopt_init_state(gs);
22 for (int i = 0; i < expected_count; i++) {
23 opt = getopt_silent(gs, args, argv, optstring);
24 if (expected[i] != opt) {
25 /*
26 * Fudge the line number so we can tell which test
27 * failed
28 */
29 ut_failf(uts, __FILE__, line, __func__,
30 "expected[i] == getopt()",
31 "Expected '%c' (%d) with i=%d, got '%c' (%d)",
32 expected[i], expected[i], i, opt, opt);
33 return CMD_RET_FAILURE;
34 }
35 }
36
37 opt = getopt_silent(gs, args, argv, optstring);
38 if (opt != -1) {
39 ut_failf(uts, __FILE__, line, __func__,
40 "getopt() != -1",
41 "Expected -1, got '%c' (%d)", opt, opt);
42 return CMD_RET_FAILURE;
43 }
44
45 return 0;
46}
47
48#define test_getopt(optstring, argv, expected) do { \
49 int ret = do_test_getopt(uts, __LINE__, &gs, optstring, \
50 ARRAY_SIZE(argv) - 1, argv, \
51 ARRAY_SIZE(expected), expected); \
52 if (ret) \
53 return ret; \
54} while (0)
55
56static int lib_test_getopt(struct unit_test_state *uts)
57{
58 struct getopt_state gs;
59
60 /* Happy path */
61 test_getopt("ab:c",
62 ((char *[]){ "program", "-cb", "x", "-a", "foo", 0 }),
63 ((int []){ 'c', 'b', 'a' }));
64 ut_asserteq(4, gs.index);
65
66 /* Make sure we pick up the optional argument */
67 test_getopt("a::b:c",
68 ((char *[]){ "program", "-cbx", "-a", "foo", 0 }),
69 ((int []){ 'c', 'b', 'a' }));
70 ut_asserteq(4, gs.index);
71
72 /* Test required arguments */
73 test_getopt("a:b", ((char *[]){ "program", "-a", 0 }),
74 ((int []){ ':' }));
75 ut_asserteq('a', gs.opt);
76 test_getopt("a:b", ((char *[]){ "program", "-b", "-a", 0 }),
77 ((int []){ 'b', ':' }));
78 ut_asserteq('a', gs.opt);
79
80 /* Test invalid arguments */
81 test_getopt("ab:c", ((char *[]){ "program", "-d", 0 }),
82 ((int []){ '?' }));
83 ut_asserteq('d', gs.opt);
84
85 /* Test arg */
86 test_getopt("a::b:c",
87 ((char *[]){ "program", "-a", 0 }),
88 ((int []){ 'a' }));
89 ut_asserteq(2, gs.index);
90 ut_assertnull(gs.arg);
91
92 test_getopt("a::b:c",
93 ((char *[]){ "program", "-afoo", 0 }),
94 ((int []){ 'a' }));
95 ut_asserteq(2, gs.index);
96 ut_assertnonnull(gs.arg);
97 ut_asserteq_str("foo", gs.arg);
98
99 test_getopt("a::b:c",
100 ((char *[]){ "program", "-a", "foo", 0 }),
101 ((int []){ 'a' }));
102 ut_asserteq(3, gs.index);
103 ut_assertnonnull(gs.arg);
104 ut_asserteq_str("foo", gs.arg);
105
106 test_getopt("a::b:c",
107 ((char *[]){ "program", "-bfoo", 0 }),
108 ((int []){ 'b' }));
109 ut_asserteq(2, gs.index);
110 ut_assertnonnull(gs.arg);
111 ut_asserteq_str("foo", gs.arg);
112
113 test_getopt("a::b:c",
114 ((char *[]){ "program", "-b", "foo", 0 }),
115 ((int []){ 'b' }));
116 ut_asserteq(3, gs.index);
117 ut_assertnonnull(gs.arg);
118 ut_asserteq_str("foo", gs.arg);
119
120 return 0;
121}
122LIB_TEST(lib_test_getopt, 0);