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Index: etc/mtree/BSD.tests.dist
===================================================================
--- etc/mtree/BSD.tests.dist
+++ etc/mtree/BSD.tests.dist
@@ -328,6 +328,8 @@
..
libdevdctl
..
+ libkvm
+ ..
libmp
..
libnv
Index: lib/libkvm/Makefile
===================================================================
--- lib/libkvm/Makefile
+++ lib/libkvm/Makefile
@@ -36,4 +36,8 @@
MLINKS+=kvm_open.3 kvm_close.3 kvm_open.3 kvm_open2.3 kvm_open.3 kvm_openfiles.3
MLINKS+=kvm_read.3 kvm_read2.3 kvm_read.3 kvm_write.3
+.include <src.opts.mk>
+
+SUBDIR.${MK_TESTS}= tests
+
.include <bsd.lib.mk>
Index: lib/libkvm/tests/Makefile
===================================================================
--- /dev/null
+++ lib/libkvm/tests/Makefile
@@ -0,0 +1,22 @@
+# $FreeBSD$
+
+.include <bsd.own.mk>
+
+ATF_TESTS_C+= kvm_close_test
+ATF_TESTS_C+= kvm_geterr_test
+ATF_TESTS_C+= kvm_open_test
+ATF_TESTS_C+= kvm_open2_test
+
+CFLAGS.kvm_geterr_test+= -I${.CURDIR:H}
+
+LIBADD+= kvm
+
+WARNS?= 6
+
+BINDIR= ${TESTSDIR}
+
+.for t in kvm_geterr_test kvm_open_test kvm_open2_test
+SRCS.$t= $t.c kvm_test_common.c
+.endfor
+
+.include <bsd.test.mk>
Index: lib/libkvm/tests/kvm_close_test.c
===================================================================
--- /dev/null
+++ lib/libkvm/tests/kvm_close_test.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 2017 Ngie Cooper <ngie@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+
+__FBSDID("$FreeBSD$");
+
+#include <errno.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <signal.h>
+
+#include <atf-c.h>
+
+ATF_TC(kvm_close_negative_test_NULL);
+ATF_TC_HEAD(kvm_close_negative_test_NULL, tc)
+{
+
+ atf_tc_set_md_var(tc, "descr",
+ "test that kvm_close(NULL) succeeds without error");
+}
+
+ATF_TC_BODY(kvm_close_negative_test_NULL, tc)
+{
+
+ ATF_REQUIRE_ERRNO(EINVAL, kvm_close(NULL) == -1);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+ ATF_TP_ADD_TC(tp, kvm_close_negative_test_NULL);
+
+ return (atf_no_error());
+}
Index: lib/libkvm/tests/kvm_geterr_test.c
===================================================================
--- /dev/null
+++ lib/libkvm/tests/kvm_geterr_test.c
@@ -0,0 +1,137 @@
+/*-
+ * Copyright (c) 2017 Ngie Cooper <ngie@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <atf-c.h>
+
+#include "kvm_private.h"
+
+#include "kvm_test_common.h"
+
+ATF_TC(kvm_geterr_negative_test_NULL);
+ATF_TC_HEAD(kvm_geterr_negative_test_NULL, tc)
+{
+
+ atf_tc_set_md_var(tc, "descr",
+ "test that kvm_geterr(NULL) returns NULL");
+}
+
+ATF_TC_BODY(kvm_geterr_negative_test_NULL, tc)
+{
+
+ ATF_REQUIRE(!errbuf_has_error(kvm_geterr(NULL)));
+}
+
+ATF_TC(kvm_geterr_positive_test_error);
+ATF_TC_HEAD(kvm_geterr_positive_test_error, tc)
+{
+
+ atf_tc_set_md_var(tc, "descr",
+ "test that kvm_geterr(kd) when kd doesn't contain an error returns NULL");
+ atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(kvm_geterr_positive_test_error, tc)
+{
+ kvm_t *kd;
+ char *error_msg;
+
+ errbuf_clear();
+ kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL);
+ ATF_CHECK(!errbuf_has_error(errbuf));
+ ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf);
+ ATF_REQUIRE_MSG(kvm_write(kd, 0, NULL, 0) == -1,
+ "kvm_write succeeded unexpectedly on an O_RDONLY file descriptor");
+ error_msg = kvm_geterr(kd);
+ ATF_CHECK(errbuf_has_error(error_msg));
+ ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s",
+ strerror(errno));
+}
+
+ATF_TC(kvm_geterr_positive_test_no_error);
+ATF_TC_HEAD(kvm_geterr_positive_test_no_error, tc)
+{
+
+ atf_tc_set_md_var(tc, "descr",
+ "test that kvm_geterr(kd) when kd contains an error returns an error message");
+ atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(kvm_geterr_positive_test_no_error, tc)
+{
+#define ALL_IS_WELL "that ends well"
+ kvm_t *kd;
+ char *error_msg;
+ struct nlist nl[] = {
+#define SYMNAME "_mp_maxcpus"
+#define X_MAXCPUS 0
+ { SYMNAME, 0, 0, 0, 0 },
+ { NULL, 0, 0, 0, 0 },
+ };
+ ssize_t rc;
+ int mp_maxcpus;
+
+ errbuf_clear();
+ kd = kvm_open2(NULL, NULL, O_RDONLY, errbuf, NULL);
+ ATF_CHECK(!errbuf_has_error(errbuf));
+ ATF_REQUIRE_MSG(kd != NULL, "kvm_open2 failed: %s", errbuf);
+ ATF_REQUIRE_MSG(kvm_nlist(kd, nl) != -1, "kvm_nlist failed: %s",
+ kvm_geterr(kd));
+ if (nl[X_MAXCPUS].n_type == 0)
+ atf_tc_skip("symbol (\"%s\") couldn't be found", SYMNAME);
+ _kvm_err(kd, NULL, "%s", ALL_IS_WELL); /* XXX: internal API */
+ rc = kvm_read(kd, nl[X_MAXCPUS].n_value, &mp_maxcpus,
+ sizeof(mp_maxcpus));
+
+ ATF_REQUIRE_MSG(rc != -1, "kvm_read failed: %s", kvm_geterr(kd));
+ error_msg = kvm_geterr(kd);
+ ATF_REQUIRE_MSG(strcmp(error_msg, ALL_IS_WELL) == 0,
+ "error message changed: %s", error_msg);
+ ATF_REQUIRE_MSG(kvm_close(kd) == 0, "kvm_close failed: %s",
+ strerror(errno));
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+ ATF_TP_ADD_TC(tp, kvm_geterr_negative_test_NULL);
+ ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_error);
+ ATF_TP_ADD_TC(tp, kvm_geterr_positive_test_no_error);
+
+ return (atf_no_error());
+}
Index: lib/libkvm/tests/kvm_open2_test.c
===================================================================
--- /dev/null
+++ lib/libkvm/tests/kvm_open2_test.c
@@ -0,0 +1,118 @@
+/*-
+ * Copyright (c) 2017 Ngie Cooper <ngie@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <limits.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <atf-c.h>
+
+#include "kvm_test_common.h"
+
+ATF_TC_WITHOUT_HEAD(kvm_open2_negative_test_nonexistent_corefile);
+ATF_TC_BODY(kvm_open2_negative_test_nonexistent_corefile, tc)
+{
+
+ errbuf_clear();
+ ATF_CHECK(kvm_open2(NULL, "/nonexistent", O_RDONLY, NULL, NULL) == NULL);
+ ATF_CHECK(!errbuf_has_error(errbuf));
+ errbuf_clear();
+ ATF_CHECK(kvm_open2(NULL, "/nonexistent", O_RDONLY,
+ errbuf, NULL) == NULL);
+ ATF_CHECK(errbuf_has_error(errbuf));
+}
+
+ATF_TC_WITHOUT_HEAD(kvm_open2_negative_test_nonexistent_execfile);
+ATF_TC_BODY(kvm_open2_negative_test_nonexistent_execfile, tc)
+{
+
+ errbuf_clear();
+ ATF_CHECK(kvm_open2("/nonexistent", _PATH_DEVZERO, O_RDONLY,
+ NULL, NULL) == NULL);
+ ATF_CHECK(strlen(errbuf) == 0);
+ errbuf_clear();
+ ATF_CHECK(kvm_open2("/nonexistent", _PATH_DEVZERO, O_RDONLY,
+ errbuf, NULL) == NULL);
+ ATF_CHECK(errbuf_has_error(errbuf));
+}
+
+ATF_TC(kvm_open2_negative_test_invalid_corefile);
+ATF_TC_HEAD(kvm_open2_negative_test_invalid_corefile, tc)
+{
+
+ atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(kvm_open2_negative_test_invalid_corefile, tc)
+{
+ kvm_t *kd;
+
+ errbuf_clear();
+ atf_utils_create_file("some-file", "this is a text file");
+ kd = kvm_open2(NULL, "some-file", O_RDONLY, errbuf, NULL);
+ ATF_CHECK(errbuf_has_error(errbuf));
+ ATF_REQUIRE_MSG(kd == NULL, "kvm_open2 succeeded");
+}
+
+ATF_TC(kvm_open2_negative_test_invalid_execfile);
+ATF_TC_HEAD(kvm_open2_negative_test_invalid_execfile, tc)
+{
+
+ atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(kvm_open2_negative_test_invalid_execfile, tc)
+{
+ kvm_t *kd;
+
+ errbuf_clear();
+ atf_utils_create_file("some-file", "this is a text file");
+ kd = kvm_open2("some-file", "/bin/sh", O_RDONLY, errbuf, NULL);
+ ATF_CHECK(errbuf_has_error(errbuf));
+ ATF_REQUIRE_MSG(kd == NULL, "kvm_open2 succeeded unexpectedly");
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+ ATF_TP_ADD_TC(tp, kvm_open2_negative_test_invalid_corefile);
+ ATF_TP_ADD_TC(tp, kvm_open2_negative_test_invalid_execfile);
+ ATF_TP_ADD_TC(tp, kvm_open2_negative_test_nonexistent_corefile);
+ ATF_TP_ADD_TC(tp, kvm_open2_negative_test_nonexistent_execfile);
+
+ return (atf_no_error());
+}
Index: lib/libkvm/tests/kvm_open_test.c
===================================================================
--- /dev/null
+++ lib/libkvm/tests/kvm_open_test.c
@@ -0,0 +1,106 @@
+/*-
+ * Copyright (c) 2017 Ngie Cooper <ngie@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <limits.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <atf-c.h>
+
+#include "kvm_test_common.h"
+
+ATF_TC_WITHOUT_HEAD(kvm_open_negative_test_nonexistent_corefile);
+ATF_TC_BODY(kvm_open_negative_test_nonexistent_corefile, tc)
+{
+
+ ATF_CHECK(kvm_open(NULL, "/nonexistent", NULL, O_RDONLY, NULL) == NULL);
+ ATF_CHECK(kvm_open(NULL, "/nonexistent", NULL, O_RDONLY,
+ getprogname()) == NULL);
+}
+
+ATF_TC_WITHOUT_HEAD(kvm_open_negative_test_nonexistent_execfile);
+ATF_TC_BODY(kvm_open_negative_test_nonexistent_execfile, tc)
+{
+
+ ATF_CHECK(kvm_open("/nonexistent", _PATH_DEVZERO, NULL, O_RDONLY,
+ NULL) == NULL);
+ ATF_CHECK(kvm_open("/nonexistent", _PATH_DEVZERO, NULL, O_RDONLY,
+ getprogname()) == NULL);
+}
+
+ATF_TC(kvm_open_negative_test_invalid_corefile);
+ATF_TC_HEAD(kvm_open_negative_test_invalid_corefile, tc)
+{
+
+ atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(kvm_open_negative_test_invalid_corefile, tc)
+{
+ kvm_t *kd;
+
+ atf_utils_create_file("some-file", "this is a text file");
+ kd = kvm_open(NULL, "some-file", NULL, O_RDONLY, getprogname());
+ ATF_REQUIRE_MSG(kd == NULL, "kvm_open didn't return NULL on failure");
+}
+
+ATF_TC(kvm_open_negative_test_invalid_execfile);
+ATF_TC_HEAD(kvm_open_negative_test_invalid_execfile, tc)
+{
+
+ atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(kvm_open_negative_test_invalid_execfile, tc)
+{
+ kvm_t *kd;
+
+ atf_utils_create_file("some-file", "this is a text file");
+ kd = kvm_open("some-file", "/bin/sh", NULL, O_RDONLY, getprogname());
+ ATF_REQUIRE_MSG(kd == NULL, "kvm_open succeeded unexpectedly");
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+ ATF_TP_ADD_TC(tp, kvm_open_negative_test_invalid_corefile);
+ ATF_TP_ADD_TC(tp, kvm_open_negative_test_invalid_execfile);
+ ATF_TP_ADD_TC(tp, kvm_open_negative_test_nonexistent_corefile);
+ ATF_TP_ADD_TC(tp, kvm_open_negative_test_nonexistent_execfile);
+
+ return (atf_no_error());
+}
Index: lib/libkvm/tests/kvm_test_common.h
===================================================================
--- /dev/null
+++ lib/libkvm/tests/kvm_test_common.h
@@ -0,0 +1,40 @@
+/*-
+ * Copyright (c) 2017 Ngie Cooper <ngie@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __KVM_TEST_COMMON_H__
+
+#include <sys/types.h>
+#include <limits.h>
+#include <stdbool.h>
+
+extern char errbuf[_POSIX2_LINE_MAX];
+
+void errbuf_clear(void);
+bool errbuf_has_error(const char *);
+
+#endif
Index: lib/libkvm/tests/kvm_test_common.c
===================================================================
--- /dev/null
+++ lib/libkvm/tests/kvm_test_common.c
@@ -0,0 +1,50 @@
+/*-
+ * Copyright (c) 2017 Ngie Cooper <ngie@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <string.h>
+
+#include "kvm_test_common.h"
+
+char errbuf[_POSIX2_LINE_MAX];
+
+void
+errbuf_clear(void)
+{
+
+ strcpy(errbuf, "");
+}
+
+bool
+errbuf_has_error(const char *_errbuf)
+{
+
+ return (strcmp(_errbuf, ""));
+}

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