dbus-transport-unix.c
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* dbus-transport-unix.c UNIX socket subclasses of DBusTransport
*
* Copyright (C) 2002, 2003, 2004 Red Hat Inc.
*
* Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <config.h>
#include <stdio.h>
#include "dbus-internals.h"
#include "dbus-connection-internal.h"
#include "dbus-transport-unix.h"
#include "dbus-transport-socket.h"
#include "dbus-transport-protected.h"
#include "dbus-watch.h"
#include "dbus-sysdeps-unix.h"
#include "dbus-test.h"
DBusTransport*
_dbus_transport_new_for_domain_socket (const char *path,
dbus_bool_t abstract,
DBusError *error)
{
int fd;
DBusTransport *transport;
DBusString address;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
if (!_dbus_string_init (&address))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return NULL;
}
fd = -1;
if ((abstract &&
!_dbus_string_append (&address, "unix:abstract=")) ||
(!abstract &&
!_dbus_string_append (&address, "unix:path=")) ||
!_dbus_string_append (&address, path))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto failed_0;
}
fd = _dbus_connect_unix_socket (path, abstract, error);
if (fd < 0)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
goto failed_0;
}
_dbus_verbose ("Successfully connected to unix socket %s\n",
path);
transport = _dbus_transport_new_for_socket (fd, NULL, &address);
if (transport == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto failed_1;
}
_dbus_string_free (&address);
return transport;
failed_1:
_dbus_close_socket (fd, NULL);
failed_0:
_dbus_string_free (&address);
return NULL;
}
static DBusTransport*
_dbus_transport_new_for_exec (const char *path,
char *const argv[],
DBusError *error)
{
int fd;
DBusTransport *transport;
DBusString address;
unsigned i;
char *escaped;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
if (!_dbus_string_init (&address))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return NULL;
}
fd = -1;
escaped = dbus_address_escape_value (path);
if (!escaped)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto failed;
}
if (!_dbus_string_append (&address, "unixexec:path=") ||
!_dbus_string_append (&address, escaped))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
dbus_free (escaped);
goto failed;
}
dbus_free (escaped);
if (argv)
{
for (i = 0; argv[i]; i++)
{
dbus_bool_t success;
escaped = dbus_address_escape_value (argv[i]);
if (!escaped)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto failed;
}
success = _dbus_string_append_printf (&address, ",argv%u=%s", i, escaped);
dbus_free (escaped);
if (!success)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto failed;
}
}
}
fd = _dbus_connect_exec (path, argv, error);
if (fd < 0)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
goto failed;
}
_dbus_verbose ("Successfully connected to process %s\n",
path);
transport = _dbus_transport_new_for_socket (fd, NULL, &address);
if (transport == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto failed;
}
_dbus_string_free (&address);
return transport;
failed:
if (fd >= 0)
_dbus_close_socket (fd, NULL);
_dbus_string_free (&address);
return NULL;
}
DBusTransportOpenResult
_dbus_transport_open_platform_specific (DBusAddressEntry *entry,
DBusTransport **transport_p,
DBusError *error)
{
const char *method;
method = dbus_address_entry_get_method (entry);
_dbus_assert (method != NULL);
if (strcmp (method, "unix") == 0)
{
const char *path = dbus_address_entry_get_value (entry, "path");
const char *tmpdir = dbus_address_entry_get_value (entry, "tmpdir");
const char *abstract = dbus_address_entry_get_value (entry, "abstract");
if (tmpdir != NULL)
{
_dbus_set_bad_address (error, NULL, NULL,
"cannot use the \"tmpdir\" option for an address to connect to, only in an address to listen on");
return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
}
if (path == NULL && abstract == NULL)
{
_dbus_set_bad_address (error, "unix",
"path or abstract",
NULL);
return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
}
if (path != NULL && abstract != NULL)
{
_dbus_set_bad_address (error, NULL, NULL,
"can't specify both \"path\" and \"abstract\" options in an address");
return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
}
if (path)
*transport_p = _dbus_transport_new_for_domain_socket (path, FALSE,
error);
else
*transport_p = _dbus_transport_new_for_domain_socket (abstract, TRUE,
error);
if (*transport_p == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
}
else
{
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return DBUS_TRANSPORT_OPEN_OK;
}
}
else if (strcmp (method, "unixexec") == 0)
{
const char *path;
unsigned i;
char **argv;
path = dbus_address_entry_get_value (entry, "path");
if (path == NULL)
{
_dbus_set_bad_address (error, NULL, NULL,
"No process path specified");
return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
}
/* First count argv arguments */
for (i = 1; ; i++)
{
char t[4+20+1]; /* "argv" plus space for a formatted base 10 64bit integer, plus NUL */
snprintf (t, sizeof(t), "argv%u", i);
if (!dbus_address_entry_get_value (entry, t))
break;
}
/* Allocate string array */
argv = dbus_new0 (char*, i+1);
if (!argv)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
}
/* Fill in string array */
for (i = 0; ; i++)
{
char t[4+20+1];
const char *p;
snprintf (t, sizeof(t), "argv%u", i);
p = dbus_address_entry_get_value (entry, t);
if (!p)
{
if (i == 0)
/* If argv0 isn't specified, fill in the path instead */
p = path;
else
break;
}
argv[i] = _dbus_strdup (p);
if (!argv[i])
{
dbus_free_string_array (argv);
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
}
}
*transport_p = _dbus_transport_new_for_exec (path, argv, error);
dbus_free_string_array (argv);
if (*transport_p == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
}
else
{
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return DBUS_TRANSPORT_OPEN_OK;
}
}
#ifdef DBUS_ENABLE_LAUNCHD
else if (strcmp (method, "launchd") == 0)
{
DBusError tmp_error = DBUS_ERROR_INIT;
const char *launchd_env_var = dbus_address_entry_get_value (entry, "env");
const char *launchd_socket;
DBusString socket_path;
dbus_bool_t valid_socket;
if (!_dbus_string_init (&socket_path))
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (launchd_env_var == NULL)
{
_dbus_set_bad_address (error, "launchd", "env", NULL);
return DBUS_TRANSPORT_OPEN_BAD_ADDRESS;
}
valid_socket = _dbus_lookup_launchd_socket (&socket_path, launchd_env_var, error);
if (dbus_error_is_set(error))
{
_dbus_string_free(&socket_path);
return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
}
if (!valid_socket)
{
dbus_set_error(&tmp_error, DBUS_ERROR_BAD_ADDRESS,
"launchd's env var %s does not exist", launchd_env_var);
dbus_error_free(error);
dbus_move_error(&tmp_error, error);
return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
}
launchd_socket = _dbus_string_get_const_data(&socket_path);
*transport_p = _dbus_transport_new_for_domain_socket (launchd_socket, FALSE, error);
if (*transport_p == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return DBUS_TRANSPORT_OPEN_DID_NOT_CONNECT;
}
else
{
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return DBUS_TRANSPORT_OPEN_OK;
}
}
#endif
else
{
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return DBUS_TRANSPORT_OPEN_NOT_HANDLED;
}
}
#ifdef DBUS_BUILD_TESTS
dbus_bool_t
_dbus_transport_unix_test (void)
{
DBusConnection *c;
DBusError error;
dbus_bool_t ret;
const char *address;
dbus_error_init (&error);
c = dbus_connection_open ("unixexec:argv0=false,argv1=foobar,path=/bin/false", &error);
_dbus_assert (c != NULL);
_dbus_assert (!dbus_error_is_set (&error));
address = _dbus_connection_get_address (c);
_dbus_assert (address != NULL);
/* Let's see if the address got parsed, reordered and formatted correctly */
ret = strcmp (address, "unixexec:path=/bin/false,argv0=false,argv1=foobar") == 0;
dbus_connection_unref (c);
return ret;
}
#endif