1/*-
2 * Copyright (c) 2017 Enji Cooper <ngie@freebsd.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: stable/11/lib/libkvm/tests/kvm_geterr_test.c 346920 2019-04-29 19:36:46Z ngie $");
28
29#include <sys/param.h>
30#include <errno.h>
31#include <fcntl.h>
32#include <kvm.h>
33#include <limits.h>
34#include <signal.h>
35#include <stdio.h>
36#include <stdlib.h>
37
38#include <atf-c.h>
39
40#include "kvm_private.h"
41
42#include "kvm_test_common.h"
43
44ATF_TC(kvm_geterr_negative_test_NULL);
45ATF_TC_HEAD(kvm_geterr_negative_test_NULL, tc)
46{
47
48	atf_tc_set_md_var(tc, "descr",
49	    "test that kvm_geterr(NULL) returns NULL");
50}
51
52ATF_TC_BODY(kvm_geterr_negative_test_NULL, tc)
53{
54
55	ATF_REQUIRE(!errbuf_has_error(kvm_geterr(NULL)));
56}
57
58/* 1100090 was where kvm_open2(3) was introduced. */
59#if __FreeBSD_version >= 1100091
60ATF_TC(kvm_geterr_positive_test_error);
61ATF_TC_HEAD(kvm_geterr_positive_test_error, tc)
62{
63
64	atf_tc_set_md_var(tc, "descr",
65	    "test that kvm_geterr(kd) when kd doesn't contain an error returns \"\"");
66	atf_tc_set_md_var(tc, "require.user", "root");
67}
68
69ATF_TC_BODY(kvm_geterr_positive_test_error, tc)
70{
71	kvm_t *kd;
72	char *error_msg;
73
74	errbuf_clear();
75	kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL);
76	ATF_CHECK(!errbuf_has_error(errbuf));
77	ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf);
78	ATF_REQUIRE_MSG(kvm_write(kd, 0, NULL, 0) == -1,
79	    "kvm_write succeeded unexpectedly on an O_RDONLY file descriptor");
80	error_msg = kvm_geterr(kd);
81	ATF_CHECK(errbuf_has_error(error_msg));
82	ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s",
83	    strerror(errno));
84}
85
86ATF_TC(kvm_geterr_positive_test_no_error);
87ATF_TC_HEAD(kvm_geterr_positive_test_no_error, tc)
88{
89
90	atf_tc_set_md_var(tc, "descr",
91	    "test that kvm_geterr(kd) when kd contains an error returns an error message");
92	atf_tc_set_md_var(tc, "require.user", "root");
93}
94
95ATF_TC_BODY(kvm_geterr_positive_test_no_error, tc)
96{
97#define	ALL_IS_WELL	"that ends well"
98	kvm_t *kd;
99	char *error_msg;
100	struct nlist nl[] = {
101#define	SYMNAME	"_mp_maxcpus"
102#define	X_MAXCPUS	0
103		{ SYMNAME, 0, 0, 0, 0 },
104		{ NULL, 0, 0, 0, 0 },
105	};
106	ssize_t rc;
107	int mp_maxcpus, retcode;
108
109	errbuf_clear();
110	kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL);
111	ATF_CHECK(!errbuf_has_error(errbuf));
112	ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf);
113	retcode = kvm_nlist(kd, nl);
114	ATF_REQUIRE_MSG(retcode != -1,
115	    "kvm_nlist failed (returned %d): %s", retcode, kvm_geterr(kd));
116	if (nl[X_MAXCPUS].n_type == 0)
117		atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME);
118	_kvm_err(kd, NULL, "%s", ALL_IS_WELL); /* XXX: internal API */
119	rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus,
120	    sizeof(mp_maxcpus));
121
122	ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd));
123	error_msg = kvm_geterr(kd);
124	ATF_REQUIRE_MSG(strcmp(error_msg, ALL_IS_WELL) == 0,
125	    "error message changed: %s", error_msg);
126	ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s",
127	    strerror(errno));
128}
129#endif
130
131ATF_TP_ADD_TCS(tp)
132{
133
134	ATF_TP_ADD_TC(tp, kvm_geterr_negative_test_NULL);
135#if __FreeBSD_version >= 1100091
136	ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_error);
137	ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_no_error);
138#endif
139
140	return (atf_no_error());
141}
142