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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/testing/selftests/filesystems/anon_inode_test.c
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// SPDX-License-Identifier: GPL-2.0

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#define _GNU_SOURCE

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#define __SANE_USERSPACE_TYPES__

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#include <fcntl.h>

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#include <stdio.h>

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#include <sys/stat.h>

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#include "kselftest_harness.h"

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#include "wrappers.h"

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TEST(anon_inode_no_chown)

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{

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	int fd_context;

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	fd_context = sys_fsopen("tmpfs", 0);

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	ASSERT_GE(fd_context, 0);

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	ASSERT_LT(fchown(fd_context, 1234, 5678), 0);

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	ASSERT_EQ(errno, EOPNOTSUPP);

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	EXPECT_EQ(close(fd_context), 0);

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}

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TEST(anon_inode_no_chmod)

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{

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	int fd_context;

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	fd_context = sys_fsopen("tmpfs", 0);

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	ASSERT_GE(fd_context, 0);

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	ASSERT_LT(fchmod(fd_context, 0777), 0);

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	ASSERT_EQ(errno, EOPNOTSUPP);

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	EXPECT_EQ(close(fd_context), 0);

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}

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TEST(anon_inode_no_exec)

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{

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	int fd_context;

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	fd_context = sys_fsopen("tmpfs", 0);

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	ASSERT_GE(fd_context, 0);

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	char *const empty_argv[] = {NULL};

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	char *const empty_envp[] = {NULL};

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	ASSERT_LT(execveat(fd_context, "", empty_argv, empty_envp, AT_EMPTY_PATH), 0);

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	ASSERT_EQ(errno, EACCES);

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	EXPECT_EQ(close(fd_context), 0);

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}

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TEST(anon_inode_no_open)

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{

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	int fd_context;

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	fd_context = sys_fsopen("tmpfs", 0);

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	ASSERT_GE(fd_context, 0);

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	ASSERT_GE(dup2(fd_context, 500), 0);

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	ASSERT_EQ(close(fd_context), 0);

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	fd_context = 500;

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	ASSERT_LT(open("/proc/self/fd/500", 0), 0);

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	ASSERT_EQ(errno, ENXIO);

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	EXPECT_EQ(close(fd_context), 0);

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}

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TEST_HARNESS_MAIN

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