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("$FreeBSD$"); 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 45 ATF_TC(kvm_geterr_negative_test_NULL); 46 ATF_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 53 ATF_TC_BODY(kvm_geterr_negative_test_NULL, tc) 54 { 55 56 ATF_REQUIRE(!errbuf_has_error(kvm_geterr(NULL))); 57 } 58 59 ATF_TC(kvm_geterr_positive_test_error); 60 ATF_TC_HEAD(kvm_geterr_positive_test_error, tc) 61 { 62 63 atf_tc_set_md_var(tc, "descr", 64 "test that kvm_geterr(kd) when kd doesn't contain an error returns \"\""); 65 atf_tc_set_md_var(tc, "require.user", "root"); 66 } 67 68 ATF_TC_BODY(kvm_geterr_positive_test_error, tc) 69 { 70 kvm_t *kd; 71 char *error_msg; 72 73 errbuf_clear(); 74 kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL); 75 ATF_CHECK(!errbuf_has_error(errbuf)); 76 ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf); 77 ATF_REQUIRE_MSG(kvm_write(kd, 0, NULL, 0) == -1, 78 "kvm_write succeeded unexpectedly on an O_RDONLY file descriptor"); 79 error_msg = kvm_geterr(kd); 80 ATF_CHECK(errbuf_has_error(error_msg)); 81 ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s", 82 strerror(errno)); 83 } 84 85 ATF_TC(kvm_geterr_positive_test_no_error); 86 ATF_TC_HEAD(kvm_geterr_positive_test_no_error, tc) 87 { 88 89 atf_tc_set_md_var(tc, "descr", 90 "test that kvm_geterr(kd) when kd contains an error returns an error message"); 91 atf_tc_set_md_var(tc, "require.user", "root"); 92 } 93 94 ATF_TC_BODY(kvm_geterr_positive_test_no_error, tc) 95 { 96 #define ALL_IS_WELL "that ends well" 97 kvm_t *kd; 98 char *error_msg; 99 struct nlist nl[] = { 100 #define SYMNAME "_mp_maxcpus" 101 #define X_MAXCPUS 0 102 { SYMNAME, 0, 0, 0, 0 }, 103 { NULL, 0, 0, 0, 0 }, 104 }; 105 ssize_t rc; 106 int mp_maxcpus, retcode; 107 108 errbuf_clear(); 109 kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL); 110 ATF_CHECK(!errbuf_has_error(errbuf)); 111 ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf); 112 retcode = kvm_nlist(kd, nl); 113 ATF_REQUIRE_MSG(retcode != -1, 114 "kvm_nlist failed (returned %d): %s", retcode, kvm_geterr(kd)); 115 if (nl[X_MAXCPUS].n_type == 0) 116 atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME); 117 _kvm_err(kd, NULL, "%s", ALL_IS_WELL); /* XXX: internal API */ 118 rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus, 119 sizeof(mp_maxcpus)); 120 121 ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd)); 122 error_msg = kvm_geterr(kd); 123 ATF_REQUIRE_MSG(strcmp(error_msg, ALL_IS_WELL) == 0, 124 "error message changed: %s", error_msg); 125 ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s", 126 strerror(errno)); 127 } 128 129 ATF_TP_ADD_TCS(tp) 130 { 131 132 ATF_TP_ADD_TC(tp, kvm_geterr_negative_test_NULL); 133 ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_error); 134 ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_no_error); 135 136 return (atf_no_error()); 137 } 138