tests: add seccomp-strict.test

* tests/seccomp-strict.c: New file.
* tests/seccomp-strict.test: New test.
* tests/.gitignore: Add seccomp-strict.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add seccomp-strict.test.

tests/.gitignore

@@ -128,6 +128,7 @@ sched_xetparam
 sched_xetscheduler
 scm_rights
 seccomp
+seccomp-strict
 select
 sendfile
 sendfile64

tests/Makefile.am

@@ -177,6 +177,7 @@ check_PROGRAMS = \
 	sched_xetscheduler \
 	scm_rights \
 	seccomp \
+	seccomp-strict \
 	select \
 	sendfile \
 	sendfile64 \
@@ -373,6 +374,7 @@ DECODER_TESTS = \
 	sched_xetparam.test \
 	sched_xetscheduler.test \
 	scm_rights-fd.test \
+	seccomp-strict.test \
 	seccomp.test \
 	select.test \
 	sendfile.test \

tests/seccomp-strict.c

@@ -0,0 +1,70 @@
+/*
+ * Check how seccomp SECCOMP_SET_MODE_STRICT is decoded.
+ *
+ * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 "tests.h"
+#include <sys/syscall.h>
+
+#if defined __NR_seccomp && defined __NR_exit
+
+# include <assert.h>
+# include <errno.h>
+# include <stdio.h>
+# include <unistd.h>
+
+int
+main(void)
+{
+	static const char text1[] =
+		"seccomp(SECCOMP_SET_MODE_STRICT, 0, NULL) = 0\n";
+	static const char text2[] = "+++ exited with 0 +++\n";
+	const unsigned long addr = (unsigned long) 0xfacefeeddeadbeef;
+	int rc = 0;
+
+	assert(syscall(__NR_seccomp, -1L, -1L, addr) == -1);
+	printf("seccomp(%#x /* SECCOMP_SET_MODE_??? */, %u, %#lx) = -1 %s (%m)\n",
+	       -1, -1, addr, ENOSYS == errno ? "ENOSYS" : "EINVAL");
+	fflush(stdout);
+
+	if (syscall(__NR_seccomp, 0, 0, 0)) {
+		printf("seccomp(SECCOMP_SET_MODE_STRICT, 0, NULL) = -1 %s (%m)\n",
+		       ENOSYS == errno ? "ENOSYS" : "EINVAL");
+		fflush(stdout);
+	} else {
+		rc += write(1, text1, LENGTH_OF(text1)) != LENGTH_OF(text1);
+	}
+
+	rc += write(1, text2, LENGTH_OF(text2)) != LENGTH_OF(text2);
+	return !!syscall(__NR_exit, rc);
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_seccomp && __NR_exit")
+
+#endif

tests/seccomp-strict.test

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Check how seccomp SECCOMP_SET_MODE_STRICT is decoded.
+
+. "${srcdir=.}/init.sh"
+run_strace_match_diff -e trace=seccomp