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#include <AK/Assertions.h>
#include <AK/Types.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/mman.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);
}
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();
return 0;
}
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