Test process descriptors.

Ensure that process descriptors work as expected. We should be able to:
 - pdfork(), like regular fork(), but producing a process descriptor
 - pdgetpid() to convert a PD into a PID
 - pdkill() to send signals to a process identified by a PD

Approved by:  re (kib), mentor (rwatson)
Sponsored by: Google Inc

5 files changed, 221 insertions, 0 deletions

diff --git a/tools/regression/security/cap_test/Makefile b/tools/regression/security/cap_test/Makefile
index 4bbb548..b36c413 100644
--- a/tools/regression/security/cap_test/Makefile
+++ b/tools/regression/security/cap_test/Makefile
@@ -5,6 +5,8 @@ SRCS=	cap_test.c \
 	cap_test_capmode.c \
 	cap_test_capabilities.c \
 	cap_test_fcntl.c \
+	cap_test_pdfork.c \
+	cap_test_pdkill.c \
 	cap_test_relative.c \
 	cap_test_sysctl.c \
 
diff --git a/tools/regression/security/cap_test/cap_test.c b/tools/regression/security/cap_test/cap_test.c
index c583454..580ce4e 100644
--- a/tools/regression/security/cap_test/cap_test.c
+++ b/tools/regression/security/cap_test/cap_test.c
@@ -49,6 +49,8 @@ struct test all_tests[] = {
 	TEST_INIT(capmode),
 	TEST_INIT(capabilities),
 	TEST_INIT(fcntl),
+	TEST_INIT(pdfork),
+	TEST_INIT(pdkill),
 	TEST_INIT(relative),
 	TEST_INIT(sysctl),
 };
diff --git a/tools/regression/security/cap_test/cap_test.h b/tools/regression/security/cap_test/cap_test.h
index 23435d6..202b998 100644
--- a/tools/regression/security/cap_test/cap_test.h
+++ b/tools/regression/security/cap_test/cap_test.h
@@ -149,6 +149,9 @@ int	execute(int id, struct test*);
 int	test_capmode(void);
 int	test_capabilities(void);
 int	test_fcntl(void);
+int	test_pdfork(void);
+int	test_pdkill(void);
+int	test_pdwait(void);
 int	test_relative(void);
 int	test_sysctl(void);
 
diff --git a/tools/regression/security/cap_test/cap_test_pdfork.c b/tools/regression/security/cap_test/cap_test_pdfork.c
new file mode 100644
index 0000000..0979fe7
--- /dev/null
+++ b/tools/regression/security/cap_test/cap_test_pdfork.c
@@ -0,0 +1,113 @@
+/*-
+ * Copyright (c) 2009-2011 Robert N. M. Watson
+ * Copyright (c) 2011 Jonathan Anderson
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Test routines to make sure a variety of system calls are or are not
+ * available in capability mode.  The goal is not to see if they work, just
+ * whether or not they return the expected ECAPMODE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <sys/capability.h>
+#include <sys/errno.h>
+#include <sys/procdesc.h>
+#include <sys/resource.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <stdio.h>
+#include <time.h>
+
+#include "cap_test.h"
+
+int
+test_pdfork(void)
+{
+	struct stat stat;
+	int success = PASSED;
+	int pd, error;
+	pid_t pid;
+	time_t now;
+
+	//cap_enter();
+
+	pid = pdfork(&pd, 0);
+	if (pid < 0)
+		err(-1, "pdfork");
+
+	else if (pid == 0) {
+		/*
+		 * Child process.
+		 *
+		 * pd should not be a valid process descriptor.
+		 */
+		error = pdgetpid(pd, &pid);
+		if (error != -1)
+			FAILX("pdgetpid succeeded");
+		else if (errno != EBADF)
+			FAIL("pdgetpid failed, but errno != EBADF");
+
+		exit(success);
+	}
+
+	/* Parent process. Ensure that [acm]times have been set correctly. */
+	REQUIRE(fstat(pd, &stat));
+
+	now = time(NULL);
+	CHECK(now != (time_t)-1);
+
+	CHECK(now >= stat.st_birthtime);
+	CHECK((now - stat.st_birthtime) < 2);
+	CHECK(stat.st_birthtime == stat.st_atime);
+	CHECK(stat.st_atime == stat.st_ctime);
+	CHECK(stat.st_ctime == stat.st_mtime);
+
+	/* Wait for the child to finish. */
+	error = pdgetpid(pd, &pid);
+	CHECK(error == 0);
+	CHECK(pid > 0);
+
+	int status;
+	while (waitpid(pid, &status, 0) != pid) {}
+	if ((success == PASSED) && WIFEXITED(status))
+		success = WEXITSTATUS(status);
+	else
+		success = FAILED;
+
+	return (success);
+}
diff --git a/tools/regression/security/cap_test/cap_test_pdkill.c b/tools/regression/security/cap_test/cap_test_pdkill.c
new file mode 100644
index 0000000..305d46a
--- /dev/null
+++ b/tools/regression/security/cap_test/cap_test_pdkill.c
@@ -0,0 +1,101 @@
+/*-
+ * Copyright (c) 2009-2011 Robert N. M. Watson
+ * Copyright (c) 2011 Jonathan Anderson
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Test routines to make sure a variety of system calls are or are not
+ * available in capability mode.  The goal is not to see if they work, just
+ * whether or not they return the expected ECAPMODE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <sys/capability.h>
+#include <sys/errno.h>
+#include <sys/procdesc.h>
+#include <sys/resource.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <stdio.h>
+
+#include "cap_test.h"
+
+void handle_signal(int);
+void handle_signal(int sig) {
+	exit(PASSED);
+}
+
+int
+test_pdkill(void)
+{
+	int success = PASSED;
+	int pd, error;
+	pid_t pid;
+
+	//cap_enter();
+
+	error = pdfork(&pd, 0);
+	if (error < 0)
+		err(-1, "pdfork");
+
+	else if (error == 0) {
+		signal(SIGINT, handle_signal);
+		sleep(3600);
+		exit(FAILED);
+	}
+
+	/* Parent process; find the child's PID (we'll need it later). */
+	error = pdgetpid(pd, &pid);
+	if (error != 0)
+		FAIL("pdgetpid");
+
+	/* Kill the child! */
+	usleep(100);
+	error = pdkill(pd, SIGINT);
+	if (error != 0)
+		FAIL("pdkill");
+
+	/* Make sure the child finished properly. */
+	int status;
+	while (waitpid(pid, &status, 0) != pid) {}
+	if ((success == PASSED) && WIFEXITED(status))
+		success = WEXITSTATUS(status);
+	else
+		success = FAILED;
+
+	return (success);
+}