kvm_geterr_test.c revision 319012 
1/*-
2 * Copyright (c) 2017 Ngie Cooper <ngie@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/lib/libkvm/tests/kvm_geterr_test.c 319012 2017-05-27 23:26:10Z ngie $");
29
30#include <sys/param.h>
31#include <errno.h>
32#include <fcntl.h>
33#include <kvm.h>
34#include <limits.h>
35#include <signal.h>
36#include <stdio.h>
37#include <stdlib.h>
38
39#include <atf-c.h>
40
41#include "kvm_private.h"
42
43#include "kvm_test_common.h"
44
45ATF_TC(kvm_geterr_negative_test_NULL);
46ATF_TC_HEAD(kvm_geterr_negative_test_NULL, tc)
47{
48
49	atf_tc_set_md_var(tc, "descr",
50	    "test that kvm_geterr(NULL) returns NULL");
51}
52
53ATF_TC_BODY(kvm_geterr_negative_test_NULL, tc)
54{
55
56	ATF_REQUIRE(!errbuf_has_error(kvm_geterr(NULL)));
57}
58
59/* 1100090 was where kvm_open2(3) was introduced. */
60#if __FreeBSD_version >= 1100091
61ATF_TC(kvm_geterr_positive_test_error);
62ATF_TC_HEAD(kvm_geterr_positive_test_error, tc)
63{
64
65	atf_tc_set_md_var(tc, "descr",
66	    "test that kvm_geterr(kd) when kd doesn't contain an error returns \"\"");
67	atf_tc_set_md_var(tc, "require.user", "root");
68}
69
70ATF_TC_BODY(kvm_geterr_positive_test_error, tc)
71{
72	kvm_t *kd;
73	char *error_msg;
74
75	errbuf_clear();
76	kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL);
77	ATF_CHECK(!errbuf_has_error(errbuf));
78	ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf);
79	ATF_REQUIRE_MSG(kvm_write(kd, 0, NULL, 0) == -1,
80	    "kvm_write succeeded unexpectedly on an O_RDONLY file descriptor");
81	error_msg = kvm_geterr(kd);
82	ATF_CHECK(errbuf_has_error(error_msg));
83	ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s",
84	    strerror(errno));
85}
86
87ATF_TC(kvm_geterr_positive_test_no_error);
88ATF_TC_HEAD(kvm_geterr_positive_test_no_error, tc)
89{
90
91	atf_tc_set_md_var(tc, "descr",
92	    "test that kvm_geterr(kd) when kd contains an error returns an error message");
93	atf_tc_set_md_var(tc, "require.user", "root");
94}
95
96ATF_TC_BODY(kvm_geterr_positive_test_no_error, tc)
97{
98#define	ALL_IS_WELL	"that ends well"
99	kvm_t *kd;
100	char *error_msg;
101	struct nlist nl[] = {
102#define	SYMNAME	"_mp_maxcpus"
103#define	X_MAXCPUS	0
104		{ SYMNAME, 0, 0, 0, 0 },
105		{ NULL, 0, 0, 0, 0 },
106	};
107	ssize_t rc;
108	int mp_maxcpus, retcode;
109
110	errbuf_clear();
111	kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL);
112	ATF_CHECK(!errbuf_has_error(errbuf));
113	ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf);
114	retcode = kvm_nlist(kd, nl);
115	ATF_REQUIRE_MSG(retcode != -1,
116	    "kvm_nlist failed (returned %d): %s", retcode, kvm_geterr(kd));
117	if (nl[X_MAXCPUS].n_type == 0)
118		atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME);
119	_kvm_err(kd, NULL, "%s", ALL_IS_WELL); /* XXX: internal API */
120	rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus,
121	    sizeof(mp_maxcpus));
122
123	ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd));
124	error_msg = kvm_geterr(kd);
125	ATF_REQUIRE_MSG(strcmp(error_msg, ALL_IS_WELL) == 0,
126	    "error message changed: %s", error_msg);
127	ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s",
128	    strerror(errno));
129}
130#endif
131
132ATF_TP_ADD_TCS(tp)
133{
134
135	ATF_TP_ADD_TC(tp, kvm_geterr_negative_test_NULL);
136#if __FreeBSD_version >= 1100091
137	ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_error);
138	ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_no_error);
139#endif
140
141	return (atf_no_error());
142}
143