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 #include <sys/param.h> 28 #include <errno.h> 29 #include <fcntl.h> 30 #include <kvm.h> 31 #include <limits.h> 32 #include <signal.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 36 #include <atf-c.h> 37 38 #include "kvm_private.h" 39 40 #include "kvm_test_common.h" 41 42 ATF_TC(kvm_geterr_negative_test_NULL); 43 ATF_TC_HEAD(kvm_geterr_negative_test_NULL, tc) 44 { 45 46 atf_tc_set_md_var(tc, "descr", 47 "test that kvm_geterr(NULL) returns NULL"); 48 } 49 50 ATF_TC_BODY(kvm_geterr_negative_test_NULL, tc) 51 { 52 53 ATF_REQUIRE(!errbuf_has_error(kvm_geterr(NULL))); 54 } 55 56 /* 1100090 was where kvm_open2(3) was introduced. */ 57 #if __FreeBSD_version >= 1100091 58 ATF_TC(kvm_geterr_positive_test_error); 59 ATF_TC_HEAD(kvm_geterr_positive_test_error, tc) 60 { 61 62 atf_tc_set_md_var(tc, "descr", 63 "test that kvm_geterr(kd) when kd doesn't contain an error returns \"\""); 64 atf_tc_set_md_var(tc, "require.user", "root"); 65 } 66 67 ATF_TC_BODY(kvm_geterr_positive_test_error, tc) 68 { 69 kvm_t *kd; 70 char *error_msg; 71 72 errbuf_clear(); 73 kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL); 74 ATF_CHECK(!errbuf_has_error(errbuf)); 75 ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf); 76 ATF_REQUIRE_MSG(kvm_write(kd, 0, NULL, 0) == -1, 77 "kvm_write succeeded unexpectedly on an O_RDONLY file descriptor"); 78 error_msg = kvm_geterr(kd); 79 ATF_CHECK(errbuf_has_error(error_msg)); 80 ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s", 81 strerror(errno)); 82 } 83 84 ATF_TC(kvm_geterr_positive_test_no_error); 85 ATF_TC_HEAD(kvm_geterr_positive_test_no_error, tc) 86 { 87 88 atf_tc_set_md_var(tc, "descr", 89 "test that kvm_geterr(kd) when kd contains an error returns an error message"); 90 atf_tc_set_md_var(tc, "require.user", "root"); 91 } 92 93 ATF_TC_BODY(kvm_geterr_positive_test_no_error, tc) 94 { 95 #define ALL_IS_WELL "that ends well" 96 kvm_t *kd; 97 char *error_msg; 98 struct nlist nl[] = { 99 #define SYMNAME "_mp_maxcpus" 100 #define X_MAXCPUS 0 101 { SYMNAME, 0, 0, 0, 0 }, 102 { NULL, 0, 0, 0, 0 }, 103 }; 104 ssize_t rc; 105 int mp_maxcpus, retcode; 106 107 errbuf_clear(); 108 kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL); 109 ATF_CHECK(!errbuf_has_error(errbuf)); 110 ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf); 111 retcode = kvm_nlist(kd, nl); 112 ATF_REQUIRE_MSG(retcode != -1, 113 "kvm_nlist failed (returned %d): %s", retcode, kvm_geterr(kd)); 114 if (nl[X_MAXCPUS].n_type == 0) 115 atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME); 116 _kvm_err(kd, NULL, "%s", ALL_IS_WELL); /* XXX: internal API */ 117 rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus, 118 sizeof(mp_maxcpus)); 119 120 ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd)); 121 error_msg = kvm_geterr(kd); 122 ATF_REQUIRE_MSG(strcmp(error_msg, ALL_IS_WELL) == 0, 123 "error message changed: %s", error_msg); 124 ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s", 125 strerror(errno)); 126 } 127 #endif 128 129 ATF_TP_ADD_TCS(tp) 130 { 131 132 ATF_TP_ADD_TC(tp, kvm_geterr_negative_test_NULL); 133 #if __FreeBSD_version >= 1100091 134 ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_error); 135 ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_no_error); 136 #endif 137 138 return (atf_no_error()); 139 } 140