ladybird/Userland/test_io.cpp

327 lines
11 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <AK/Assertions.h>
#include <AK/Types.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <unistd.h>
#define EXPECT_ERROR_2(err, syscall, arg1, arg2) \
do { \
rc = syscall(arg1, arg2); \
if (rc >= 0 || errno != err) { \
fprintf(stderr, __FILE__ ":%d: Expected " #err ": " #syscall "(%p, %p), got rc=%d, errno=%d\n", __LINE__, (const void*)(arg1), (const void*)arg2, rc, errno); \
} \
} while (0)
#define EXPECT_ERROR_3(err, syscall, arg1, arg2, arg3) \
do { \
rc = syscall(arg1, arg2, arg3); \
if (rc >= 0 || errno != err) { \
fprintf(stderr, __FILE__ ":%d: Expected " #err ": " #syscall "(%p, %p, %p), got rc=%d, errno=%d\n", __LINE__, (const void*)(arg1), (const void*)(arg2), (const void*)(arg3), rc, errno); \
} \
} while (0)
void test_read_from_directory()
{
char buffer[BUFSIZ];
int fd = open("/", O_DIRECTORY | O_RDONLY);
ASSERT(fd >= 0);
int rc;
EXPECT_ERROR_3(EISDIR, read, fd, buffer, sizeof(buffer));
rc = close(fd);
ASSERT(rc == 0);
}
void test_write_to_directory()
{
char str[] = "oh frick";
int fd = open("/", O_DIRECTORY | O_RDONLY);
if (fd < 0)
perror("open");
ASSERT(fd >= 0);
int rc;
EXPECT_ERROR_3(EBADF, write, fd, str, sizeof(str));
rc = close(fd);
ASSERT(rc == 0);
}
void test_read_from_writeonly()
{
char buffer[BUFSIZ];
int fd = open("/tmp/xxxx123", O_CREAT | O_WRONLY);
ASSERT(fd >= 0);
int rc;
EXPECT_ERROR_3(EBADF, read, fd, buffer, sizeof(buffer));
rc = close(fd);
ASSERT(rc == 0);
}
void test_write_to_readonly()
{
char str[] = "hello";
int fd = open("/tmp/abcd123", O_CREAT | O_RDONLY);
ASSERT(fd >= 0);
int rc;
EXPECT_ERROR_3(EBADF, write, fd, str, sizeof(str));
rc = close(fd);
ASSERT(rc == 0);
}
void test_read_past_eof()
{
char buffer[BUFSIZ];
int fd = open("/home/anon/myfile.txt", O_RDONLY);
if (fd < 0)
perror("open");
ASSERT(fd >= 0);
int rc;
rc = lseek(fd, 9999, SEEK_SET);
if (rc < 0)
perror("lseek");
rc = read(fd, buffer, sizeof(buffer));
if (rc < 0)
perror("read");
if (rc > 0)
fprintf(stderr, "read %d bytes past EOF\n", rc);
rc = close(fd);
ASSERT(rc == 0);
}
void test_ftruncate_readonly()
{
int fd = open("/tmp/trunctest", O_RDONLY | O_CREAT, 0666);
ASSERT(fd >= 0);
int rc;
EXPECT_ERROR_2(EBADF, ftruncate, fd, 0);
close(fd);
}
void test_ftruncate_negative()
{
int fd = open("/tmp/trunctest", O_RDWR | O_CREAT, 0666);
ASSERT(fd >= 0);
int rc;
EXPECT_ERROR_2(EINVAL, ftruncate, fd, -1);
close(fd);
}
void test_mmap_directory()
{
int fd = open("/tmp", O_RDONLY | O_DIRECTORY);
ASSERT(fd >= 0);
auto* ptr = mmap(nullptr, 4096, PROT_READ, MAP_FILE | MAP_SHARED, fd, 0);
if (ptr != MAP_FAILED) {
fprintf(stderr, "Boo! mmap() of a directory succeeded!\n");
return;
}
if (errno != ENODEV) {
fprintf(stderr, "Boo! mmap() of a directory gave errno=%d instead of ENODEV!\n", errno);
return;
}
close(fd);
}
void test_tmpfs_read_past_end()
{
int fd = open("/tmp/x", O_RDWR | O_CREAT | O_TRUNC, 0600);
ASSERT(fd >= 0);
int rc = ftruncate(fd, 1);
ASSERT(rc == 0);
rc = lseek(fd, 4096, SEEK_SET);
ASSERT(rc == 4096);
char buffer[16];
int nread = read(fd, buffer, sizeof(buffer));
if (nread != 0) {
fprintf(stderr, "Expected 0-length read past end of file in /tmp\n");
}
close(fd);
}
void test_procfs_read_past_end()
{
int fd = open("/proc/uptime", O_RDONLY);
ASSERT(fd >= 0);
int rc = lseek(fd, 4096, SEEK_SET);
ASSERT(rc == 4096);
char buffer[16];
int nread = read(fd, buffer, sizeof(buffer));
if (nread != 0) {
fprintf(stderr, "Expected 0-length read past end of file in /proc\n");
}
close(fd);
}
void test_open_create_device()
{
int fd = open("/tmp/fakedevice", (O_RDWR | O_CREAT), (S_IFCHR | 0600));
ASSERT(fd >= 0);
struct stat st;
if (fstat(fd, &st) < 0) {
perror("stat");
ASSERT_NOT_REACHED();
}
if (st.st_mode != 0100600) {
fprintf(stderr, "Expected mode 0100600 after attempt to create a device node with open(O_CREAT), mode=%o\n", st.st_mode);
}
unlink("/tmp/fakedevice");
close(fd);
}
void test_unlink_symlink()
{
int rc = symlink("/proc/2/foo", "/tmp/linky");
if (rc < 0) {
perror("symlink");
ASSERT_NOT_REACHED();
}
char buffer[PATH_MAX];
rc = readlink("/tmp/linky", buffer, sizeof(buffer));
ASSERT(rc == strlen("/proc/2/foo") + 1);
rc = unlink("/tmp/linky");
if (rc < 0) {
perror("unlink");
fprintf(stderr, "Expected unlink() of a symlink into an unreadable directory to succeed!\n");
}
}
void test_eoverflow()
{
int fd = open("/tmp/x", O_RDWR);
ASSERT(fd >= 0);
int rc = lseek(fd, INT32_MAX, SEEK_SET);
ASSERT(rc == INT32_MAX);
char buffer[16];
rc = read(fd, buffer, sizeof(buffer));
if (rc >= 0 || errno != EOVERFLOW) {
fprintf(stderr, "Expected EOVERFLOW when trying to read past INT32_MAX\n");
}
rc = write(fd, buffer, sizeof(buffer));
if (rc >= 0 || errno != EOVERFLOW) {
fprintf(stderr, "Expected EOVERFLOW when trying to write past INT32_MAX\n");
}
close(fd);
}
void test_rmdir_while_inside_dir()
{
int rc = mkdir("/home/anon/testdir", 0700);
ASSERT(rc == 0);
rc = chdir("/home/anon/testdir");
ASSERT(rc == 0);
rc = rmdir("/home/anon/testdir");
ASSERT(rc == 0);
int fd = open("x", O_CREAT | O_RDWR, 0600);
if (fd >= 0 || errno != ENOENT) {
fprintf(stderr, "Expected ENOENT when trying to create a file inside a deleted directory. Got %d with errno=%d\n", fd, errno);
}
rc = chdir("/home/anon");
ASSERT(rc == 0);
}
void test_writev()
{
int pipefds[2];
pipe(pipefds);
iovec iov[2];
iov[0].iov_base = const_cast<void*>((const void*)"Hello");
iov[0].iov_len = 5;
iov[1].iov_base = const_cast<void*>((const void*)"Friends");
iov[1].iov_len = 7;
int nwritten = writev(pipefds[1], iov, 2);
if (nwritten < 0) {
perror("writev");
ASSERT_NOT_REACHED();
}
if (nwritten != 12) {
fprintf(stderr, "Didn't write 12 bytes to pipe with writev\n");
ASSERT_NOT_REACHED();
}
char buffer[32];
int nread = read(pipefds[0], buffer, sizeof(buffer));
if (nread != 12 || memcmp(buffer, "HelloFriends", 12)) {
fprintf(stderr, "Didn't read the expected data from pipe after writev\n");
ASSERT_NOT_REACHED();
}
close(pipefds[0]);
close(pipefds[1]);
}
int main(int, char**)
{
int rc;
EXPECT_ERROR_2(ENOTDIR, open, "/dev/zero", (O_DIRECTORY | O_RDONLY));
EXPECT_ERROR_2(EINVAL, open, "/dev/zero", (O_DIRECTORY | O_CREAT | O_RDWR));
EXPECT_ERROR_2(EEXIST, open, "/dev/zero", (O_CREAT | O_EXCL | O_RDWR));
EXPECT_ERROR_2(EINVAL, open, "/tmp/abcdef", (O_DIRECTORY | O_CREAT | O_RDWR));
EXPECT_ERROR_2(EACCES, open, "/proc/all", (O_RDWR));
EXPECT_ERROR_2(ENOENT, open, "/boof/baaf/nonexistent", (O_CREAT | O_RDWR));
EXPECT_ERROR_2(EISDIR, open, "/tmp", (O_DIRECTORY | O_RDWR));
test_read_from_directory();
test_write_to_directory();
test_read_from_writeonly();
test_write_to_readonly();
test_read_past_eof();
test_ftruncate_readonly();
test_ftruncate_negative();
test_mmap_directory();
test_tmpfs_read_past_end();
test_procfs_read_past_end();
test_open_create_device();
test_unlink_symlink();
test_eoverflow();
test_rmdir_while_inside_dir();
test_writev();
EXPECT_ERROR_2(EPERM, link, "/", "/home/anon/lolroot");
return 0;
}