test-istream-unix.c revision bcb4e51a409d94ae670de96afb8483a4f7855294
/* Copyright (c) 2015-2018 Dovecot authors, see the included COPYING file */
#include "test-lib.h"
#include "net.h"
#include "fdpass.h"
#include "istream.h"
#include "istream-unix.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
static int send_fd, send_fd2;
static void write_one(int fd)
{
if (write(fd, "1", 1) < 0)
i_fatal("write() failed: %m");
}
static void read_one(int fd)
{
char buf;
if (read(fd, &buf, 1) < 0)
i_fatal("read() failed: m");
}
static void
test_server_read_nofd(struct istream *input, unsigned int idx)
{
const unsigned char *data;
size_t size;
test_assert_idx(i_stream_read_more(input, &data, &size) == 1, idx);
i_stream_skip(input, 1);
test_assert_idx(i_stream_unix_get_read_fd(input) == -1, idx);
}
static void
test_server_read_fd(struct istream *input, int wanted_fd, unsigned int idx)
{
struct stat st1, st2;
const unsigned char *data;
size_t size;
int recv_fd;
test_assert_idx(i_stream_read_more(input, &data, &size) == 1, idx);
i_stream_skip(input, 1);
test_assert_idx((recv_fd = i_stream_unix_get_read_fd(input)) != -1, idx);
if (recv_fd != -1) {
if (fstat(recv_fd, &st1) < 0 || fstat(wanted_fd, &st2) < 0)
i_fatal("fstat() failed: %m");
test_assert_idx(st1.st_ino == st2.st_ino, idx);
i_close_fd(&recv_fd);
}
}
static void test_istream_unix_server(int fd)
{
struct istream *input;
const unsigned char *data;
size_t size;
input = i_stream_create_unix(fd, 1024);
/* 1) simple read */
test_server_read_nofd(input, 1);
write_one(fd);
/* 2) fd was sent but we won't get it */
test_server_read_nofd(input, 2);
/* we still shouldn't have the fd */
i_stream_set_blocking(input, FALSE);
i_stream_unix_set_read_fd(input);
test_assert(i_stream_read_more(input, &data, &size) == 0);
test_assert(i_stream_unix_get_read_fd(input) == -1);
i_stream_set_blocking(input, TRUE);
write_one(fd);
/* 3) the previous fd should be lost now */
test_server_read_nofd(input, 3);
write_one(fd);
/* 4) we should get the fd now */
test_server_read_fd(input, send_fd2, 4);
write_one(fd);
/* 5) the previous fd shouldn't be returned anymore */
i_stream_unix_set_read_fd(input);
test_server_read_nofd(input, 5);
write_one(fd);
/* 6) with i_stream_unix_unset_read_fd() we shouldn't get fd anymore */
i_stream_unix_unset_read_fd(input);
test_server_read_nofd(input, 6);
write_one(fd);
/* 7-8) two fds were sent, but we'll get only the first one */
i_stream_unix_set_read_fd(input);
test_server_read_fd(input, send_fd, 7);
test_server_read_nofd(input, 8);
write_one(fd);
/* 9-10) two fds were sent, and we'll get them both */
i_stream_unix_set_read_fd(input);
test_server_read_fd(input, send_fd, 9);
i_stream_unix_set_read_fd(input);
test_server_read_fd(input, send_fd2, 10);
write_one(fd);
i_stream_destroy(&input);
i_close_fd(&fd);
}
static void test_istream_unix_client(int fd)
{
/* 1) */
write_one(fd);
read_one(fd);
/* 2) */
if (fd_send(fd, send_fd, "1", 1) < 0)
i_fatal("fd_send() failed: %m");
read_one(fd);
/* 3) */
write_one(fd);
read_one(fd);
/* 4) */
if (fd_send(fd, send_fd2, "1", 1) < 0)
i_fatal("fd_send() failed: %m");
read_one(fd);
/* 5) */
write_one(fd);
read_one(fd);
/* 6) */
if (fd_send(fd, send_fd, "1", 1) < 0)
i_fatal("fd_send() failed: %m");
read_one(fd);
/* 7-8) */
if (fd_send(fd, send_fd, "1", 1) < 0)
i_fatal("fd_send() failed: %m");
if (fd_send(fd, send_fd2, "1", 1) < 0)
i_fatal("fd_send() failed: %m");
read_one(fd);
/* 9-10) */
if (fd_send(fd, send_fd, "1", 1) < 0)
i_fatal("fd_send() failed: %m");
if (fd_send(fd, send_fd2, "1", 1) < 0)
i_fatal("fd_send() failed: %m");
read_one(fd);
i_close_fd(&fd);
}
void test_istream_unix(void)
{
int fd[2];
test_begin("istream unix");
if ((send_fd = open("/dev/null", O_RDONLY)) == -1)
i_fatal("open(/dev/null) failed: %m");
if ((send_fd2 = open("/dev/zero", O_RDONLY)) == -1)
i_fatal("open(/dev/zero) failed: %m");
if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) < 0)
i_fatal("socketpair() failed: %m");
switch (fork()) {
case -1:
i_fatal("fork() failed: %m");
case 0:
i_close_fd(&fd[0]);
test_istream_unix_client(fd[1]);
test_exit(0);
default:
i_close_fd(&fd[1]);
test_istream_unix_server(fd[0]);
break;
}
i_close_fd(&send_fd);
i_close_fd(&send_fd2);
test_end();
}