/* Stderr */
SshStream ssh_stream_fd_stderr(void)
{
SshStream str;
str = ssh_stream_fd_wrap2(2, 2, FALSE);
if (str == NULL)
ssh_fatal("Insufficient resources to create stderr stream");
return str;
}
int main(int argc, char **argv)
{
SshStream stdio_stream;
SshSigner signer;
char config_filename[512];
char *temp_name;
#ifdef SLEEP_AFTER_STARTUP
sleep(30);
#endif /* SLEEP_AFTER_STARTUP */
/* Get program name (without path). */
if ((temp_name = strrchr(argv[0], '/')) != NULL)
progname = ssh_xstrdup(temp_name + 1);
else
progname = ssh_xstrdup(argv[0]);
/* XXX there should be a way to give command-line parameters to this
program, but, they should only be used if the uid is the same as
euid. */
ssh_event_loop_initialize();
signer = ssh_xcalloc(1, sizeof(*signer));
#ifdef SIGNER_QUIET
signer->quiet = TRUE;
#else /* SIGNER_QUIET */
signer->quiet = FALSE;
#endif /* SIGNER_QUIET */
ssh_debug_register_callbacks(signer_ssh_fatal, signer_ssh_warning,
signer_ssh_debug, (void *)signer);
#ifdef SIGNER_DEBUG
ssh_debug_set_global_level(5);
#endif /* SIGNER_DEBUG */
/* Act as server. */
signer->config = ssh_server_create_config();
SSH_TRACE(2, ("public key file: %s", signer->config->public_host_key_file));
SSH_TRACE(2, ("private key file: %s", signer->config->host_key_file));
SSH_TRACE(2, ("randomseed file: %s", signer->config->random_seed_file));
/* Initialize user context with euid. This is used to dig up the
hostkey and such. */
signer->effective_user_data = ssh_user_initialize_with_uid(geteuid(), FALSE);
signer->random_state = ssh_randseed_open(signer->effective_user_data,
signer->config);
/* XXX what about alternative config files? This should be possible
to configure somehow. An option for configure is probably a good
idea. */
snprintf(config_filename, sizeof(config_filename), "%s/%s",
SSH_SERVER_DIR, SSH_SERVER_CONFIG_FILE);
if (!ssh_config_read_file(signer->effective_user_data, signer->config,
NULL, config_filename, NULL))
ssh_warning("%s: Failed to read config file %s", argv[0],
config_filename);
stdio_stream = ssh_stream_fd_wrap2(fileno(stdin), fileno(stdout),
TRUE);
signer->wrapper = ssh_packet_wrap(stdio_stream,
signer_received_packet,
signer_received_eof,
signer_can_send,
signer);
ssh_event_loop_run();
return 0;
}
SshStream ssh_stream_fd_stdio()
{
return ssh_stream_fd_wrap2(0, 1, FALSE);
}
SshStream ssh_stream_fd_wrap(int fd, Boolean close_on_destroy)
{
return ssh_stream_fd_wrap2(fd, fd, close_on_destroy);
}
SshPipeStatus ssh_pipe_create_and_fork(SshStream *stdio_return,
SshStream *stderr_return)
{
int pin[2], pout[2], perr[2];
pid_t pid;
SshPipeStream pipes;
if (pipe(pin) < 0)
return SSH_PIPE_ERROR;
if (pipe(pout) < 0)
{
close(pin[0]);
close(pin[1]);
return SSH_PIPE_ERROR;
}
if (stderr_return != NULL && pipe(perr) < 0)
{
close(pin[0]);
close(pin[1]);
close(pout[0]);
close(pout[1]);
return SSH_PIPE_ERROR;
}
/* Initialize SIGCHLD handling. This will ensure the SIGCHLD won't get
delivered until we register the handler for the new process below. */
ssh_sigchld_initialize();
/* Fork a child process. */
pid = fork();
if (pid < 0)
{
ssh_warning("Fork failed: %s", strerror(errno));
close(pin[0]);
close(pin[1]);
close(pout[0]);
close(pout[1]);
if (stderr_return != NULL)
{
close(perr[0]);
close(perr[1]);
}
return SSH_PIPE_ERROR;
}
/* The remaining processing depends on whether we are the parent or
the child. */
if (pid == 0)
{
/* Redirect stdin. */
close(pin[1]);
if (dup2(pin[0], 0) < 0)
perror("dup2 stdin");
close(pin[0]);
/* Redirect stdout. */
close(pout[0]);
if (dup2(pout[1], 1) < 0)
perror("dup2 stdout");
close(pout[1]);
if (stderr_return != NULL)
{
/* Redirect stderr. */
close(perr[0]);
if (dup2(perr[1], 2) < 0)
perror("dup2 stderr");
close(perr[1]);
}
*stdio_return = NULL;
if (stderr_return != NULL)
*stderr_return = NULL;
return SSH_PIPE_CHILD_OK;
}
/* Parent */
pipes = ssh_xcalloc(sizeof(*pipes), 1);
pipes->pid = pid;
pipes->callback = NULL;
pipes->callback_context = NULL;
pipes->status_returned = FALSE;
pipes->exit_status = -1;
/* Close the child-side file descriptors. */
close(pin[0]);
close(pout[1]);
if (stderr_return != NULL)
close(perr[1]);
/* Register a handler for SIGCHLD for our new child. */
ssh_sigchld_register(pid, ssh_pipe_sigchld_handler, (void *)pipes);
/* Wrap the master fd into a stream. */
pipes->stdio_stream = ssh_stream_fd_wrap2(pout[0], pin[1], TRUE);
*stdio_return = ssh_stream_create(&ssh_pipe_methods, (void *) pipes);
/* Create the stderr stream if requested. */
/* XXX should another context (errpipes?) be allocated for this, so that
this, too, could be created as above?*/
if (stderr_return != NULL)
*stderr_return = ssh_stream_fd_wrap(perr[0], TRUE);
return SSH_PIPE_PARENT_OK;
}
SshStream ssh_stream_fd_wrap(SshIOHandle fd, Boolean close_on_destroy)
{
return ssh_stream_fd_wrap2(fd, fd, close_on_destroy);
}