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/param.h> 27 #include <errno.h> 28 #include <fcntl.h> 29 #include <kvm.h> 30 #include <limits.h> 31 #include <signal.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 35 #include <atf-c.h> 36 37 #include "kvm_private.h" 38 39 #include "kvm_test_common.h" 40 41 ATF_TC(kvm_geterr_negative_test_NULL); 42 ATF_TC_HEAD(kvm_geterr_negative_test_NULL, tc) 43 { 44 45 atf_tc_set_md_var(tc, "descr", 46 "test that kvm_geterr(NULL) returns NULL"); 47 } 48 49 ATF_TC_BODY(kvm_geterr_negative_test_NULL, tc) 50 { 51 52 ATF_REQUIRE(!errbuf_has_error(kvm_geterr(NULL))); 53 } 54 55 /* 1100090 was where kvm_open2(3) was introduced. */ 56 #if __FreeBSD_version >= 1100091 57 ATF_TC(kvm_geterr_positive_test_error); 58 ATF_TC_HEAD(kvm_geterr_positive_test_error, tc) 59 { 60 61 atf_tc_set_md_var(tc, "descr", 62 "test that kvm_geterr(kd) when kd doesn't contain an error returns \"\""); 63 atf_tc_set_md_var(tc, "require.user", "root"); 64 } 65 66 ATF_TC_BODY(kvm_geterr_positive_test_error, tc) 67 { 68 kvm_t *kd; 69 char *error_msg; 70 71 errbuf_clear(); 72 kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL); 73 ATF_CHECK(!errbuf_has_error(errbuf)); 74 ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf); 75 ATF_REQUIRE_MSG(kvm_write(kd, 0, NULL, 0) == -1, 76 "kvm_write succeeded unexpectedly on an O_RDONLY file descriptor"); 77 error_msg = kvm_geterr(kd); 78 ATF_CHECK(errbuf_has_error(error_msg)); 79 ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s", 80 strerror(errno)); 81 } 82 83 ATF_TC(kvm_geterr_positive_test_no_error); 84 ATF_TC_HEAD(kvm_geterr_positive_test_no_error, tc) 85 { 86 87 atf_tc_set_md_var(tc, "descr", 88 "test that kvm_geterr(kd) when kd contains an error returns an error message"); 89 atf_tc_set_md_var(tc, "require.user", "root"); 90 } 91 92 ATF_TC_BODY(kvm_geterr_positive_test_no_error, tc) 93 { 94 #define ALL_IS_WELL "that ends well" 95 kvm_t *kd; 96 char *error_msg; 97 struct nlist nl[] = { 98 #define SYMNAME "_mp_maxcpus" 99 #define X_MAXCPUS 0 100 { SYMNAME, 0, 0, 0, 0 }, 101 { NULL, 0, 0, 0, 0 }, 102 }; 103 ssize_t rc; 104 int mp_maxcpus, retcode; 105 106 errbuf_clear(); 107 kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL); 108 ATF_CHECK(!errbuf_has_error(errbuf)); 109 ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf); 110 retcode = kvm_nlist(kd, nl); 111 ATF_REQUIRE_MSG(retcode != -1, 112 "kvm_nlist failed (returned %d): %s", retcode, kvm_geterr(kd)); 113 if (nl[X_MAXCPUS].n_type == 0) 114 atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME); 115 _kvm_err(kd, NULL, "%s", ALL_IS_WELL); /* XXX: internal API */ 116 rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus, 117 sizeof(mp_maxcpus)); 118 119 ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd)); 120 error_msg = kvm_geterr(kd); 121 ATF_REQUIRE_MSG(strcmp(error_msg, ALL_IS_WELL) == 0, 122 "error message changed: %s", error_msg); 123 ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s", 124 strerror(errno)); 125 } 126 #endif 127 128 ATF_TP_ADD_TCS(tp) 129 { 130 131 ATF_TP_ADD_TC(tp, kvm_geterr_negative_test_NULL); 132 #if __FreeBSD_version >= 1100091 133 ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_error); 134 ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_no_error); 135 #endif 136 137 return (atf_no_error()); 138 } 139