xref: /xnu-12377.1.9/tests/read_nullbuf.c (revision f6217f891ac0bb64f3d375211650a4c1ff8ca1ea)

/*
 * Copyright (c) 2022 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

#include <darwintest.h>
#include <darwintest_utils.h>

T_GLOBAL_META(
	T_META_RUN_CONCURRENTLY(true),
	T_META_NAMESPACE("xnu.vfs"),
	T_META_OWNER("chrisjd")
	);

T_DECL(read_nullbuf, "read into a NULL buffer should fail")
{
	int fd;
	ssize_t result;

	fd = open("/etc/passwd", O_RDONLY);
	T_ASSERT_NE(fd, -1, "open /etc/passwd for reading");

	result = read(fd, NULL, 8);
	T_ASSERT_EQ(result, -1, "expected to fail");
	T_ASSERT_EQ(errno, EFAULT, "should have errno == EFAULT");
}