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 /* 1100090 was where kvm_open2(3) was introduced. */ 60 #if __FreeBSD_version >= 1100091 61 ATF_TC(kvm_geterr_positive_test_error); 62 ATF_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 70 ATF_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 87 ATF_TC(kvm_geterr_positive_test_no_error); 88 ATF_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 96 ATF_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 131 132 ATF_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