27 #include "dbus-internals.h"    28 #include "dbus-sysdeps.h"    29 #include "dbus-sysdeps-unix.h"    30 #include "dbus-threads.h"    31 #include "dbus-protocol.h"    32 #include "dbus-file.h"    33 #include "dbus-transport.h"    34 #include "dbus-string.h"    35 #include "dbus-userdb.h"    36 #include "dbus-list.h"    37 #include "dbus-credentials.h"    38 #include "dbus-nonce.h"    40 #include <sys/types.h>    47 #include <sys/socket.h>    56 #include <netinet/in.h>    57 #include <netinet/tcp.h>    60 #include <arpa/inet.h>    74 #ifdef HAVE_GETPEERUCRED    86 #include <systemd/sd-daemon.h>    98 #define AI_ADDRCONFIG 0   101 #ifndef HAVE_SOCKLEN_T   102 #define socklen_t int   105 #if defined (__sun) || defined (__sun__)   118 #     define CMSG_ALIGN(len) _CMSG_DATA_ALIGN (len)   121 #     define CMSG_ALIGN(len) (((len) + sizeof (long) - 1) & \   122                               ~(sizeof (long) - 1))   127 #   define CMSG_SPACE(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + \   132 #   define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))   153                            const char                 **error_str_p)
   155   static int const relevant_flag[] = { DBUS_FORCE_STDIN_NULL,
   156       DBUS_FORCE_STDOUT_NULL,
   157       DBUS_FORCE_STDERR_NULL };
   159   const char *error_str = 
"Failed mysteriously";
   163   _DBUS_STATIC_ASSERT (STDIN_FILENO == 0);
   164   _DBUS_STATIC_ASSERT (STDOUT_FILENO == 1);
   165   _DBUS_STATIC_ASSERT (STDERR_FILENO == 2);
   168   for (i = STDIN_FILENO; i <= STDERR_FILENO; i++)
   174         devnull = open (
"/dev/null", O_RDWR);
   178           error_str = 
"Failed to open /dev/null";
   187       if (devnull != i && (flags & relevant_flag[i]) != 0)
   189           if (dup2 (devnull, i) < 0)
   191               error_str = 
"Failed to dup2 /dev/null onto a standard fd";
   202   if (devnull > STDERR_FILENO)
   205   if (error_str_p != 
NULL)
   206     *error_str_p = error_str;
   209   return (error_str == 
NULL);
   212 static dbus_bool_t _dbus_set_fd_nonblocking (
int             fd,
   216 _dbus_open_socket (
int              *fd_p,
   225   *fd_p = socket (domain, type | SOCK_CLOEXEC, protocol);
   226   cloexec_done = *fd_p >= 0;
   229   if (*fd_p < 0 && (errno == EINVAL || errno == EPROTOTYPE))
   232       *fd_p = socket (domain, type, protocol);
   244       _dbus_verbose (
"socket fd %d opened\n", *fd_p);
   251                      "Failed to open socket: %s",
   252                      _dbus_strerror (errno));
   268 _dbus_open_unix_socket (
int              *fd,
   271   return _dbus_open_socket(fd, PF_UNIX, SOCK_STREAM, 0, error);
   322 #if HAVE_DECL_MSG_NOSIGNAL   326   data = _dbus_string_get_const_data_len (buffer, start, len);
   330   bytes_written = send (fd.fd, data, len, MSG_NOSIGNAL);
   332   if (bytes_written < 0 && errno == EINTR)
   335   return bytes_written;
   360 #ifndef HAVE_UNIX_FD_PASSING   378   start = _dbus_string_get_length (buffer);
   398   m.msg_controllen = CMSG_SPACE(*n_fds * 
sizeof(
int));
   402   m.msg_control = alloca(m.msg_controllen);
   403   memset(m.msg_control, 0, m.msg_controllen);
   409   m.msg_controllen = CMSG_LEN (*n_fds * 
sizeof(
int));
   413   bytes_read = recvmsg (fd.fd, &m, 0
   414 #ifdef MSG_CMSG_CLOEXEC
   435       if (m.msg_flags & MSG_CTRUNC)
   447       for (cm = CMSG_FIRSTHDR(&m); cm; cm = CMSG_NXTHDR(&m, cm))
   448         if (cm->cmsg_level == SOL_SOCKET && cm->cmsg_type == SCM_RIGHTS)
   451             int *payload = (
int *) CMSG_DATA (cm);
   452             size_t payload_len_bytes = (cm->cmsg_len - CMSG_LEN (0));
   453             size_t payload_len_fds = payload_len_bytes / 
sizeof (int);
   459             _DBUS_STATIC_ASSERT (
sizeof (
size_t) >= 
sizeof (
int));
   461             if (_DBUS_LIKELY (payload_len_fds <= (
size_t) *n_fds))
   464                 fds_to_use = payload_len_fds;
   472                 fds_to_use = (size_t) *n_fds;
   477                 for (i = fds_to_use; i < payload_len_fds; i++)
   483             memcpy (fds, payload, fds_to_use * 
sizeof (
int));
   487             *n_fds = (int) fds_to_use;
   492             for (i = 0; i < fds_to_use; i++)
   515 _dbus_write_socket_with_unix_fds(
DBusSocket        fd,
   522 #ifndef HAVE_UNIX_FD_PASSING   531   return _dbus_write_socket_with_unix_fds_two(fd, buffer, start, len, 
NULL, 0, 0, fds, n_fds);
   536 _dbus_write_socket_with_unix_fds_two(
DBusSocket        fd,
   546 #ifndef HAVE_UNIX_FD_PASSING   554                                 buffer1, start1, len1,
   555                                 buffer2, start2, len2);
   568   iov[0].iov_base = (
char*) _dbus_string_get_const_data_len (buffer1, start1, len1);
   569   iov[0].iov_len = len1;
   573       iov[1].iov_base = (
char*) _dbus_string_get_const_data_len (buffer2, start2, len2);
   574       iov[1].iov_len = len2;
   579   m.msg_iovlen = buffer2 ? 2 : 1;
   583       m.msg_controllen = CMSG_SPACE(n_fds * 
sizeof(
int));
   584       m.msg_control = alloca(m.msg_controllen);
   585       memset(m.msg_control, 0, m.msg_controllen);
   587       cm = CMSG_FIRSTHDR(&m);
   588       cm->cmsg_level = SOL_SOCKET;
   589       cm->cmsg_type = SCM_RIGHTS;
   590       cm->cmsg_len = CMSG_LEN(n_fds * 
sizeof(
int));
   591       memcpy(CMSG_DATA(cm), fds, n_fds * 
sizeof(
int));
   596   bytes_written = sendmsg (fd.fd, &m, 0
   597 #
if HAVE_DECL_MSG_NOSIGNAL
   602   if (bytes_written < 0 && errno == EINTR)
   606   if (bytes_written > 0)
   610   return bytes_written;
   636 #if HAVE_DECL_MSG_NOSIGNAL   637   struct iovec vectors[2];
   649   data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
   652     data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
   660   vectors[0].iov_base = (
char*) data1;
   661   vectors[0].iov_len = len1;
   662   vectors[1].iov_base = (
char*) data2;
   663   vectors[1].iov_len = len2;
   667   m.msg_iovlen = data2 ? 2 : 1;
   671   bytes_written = sendmsg (fd.fd, &m, MSG_NOSIGNAL);
   673   if (bytes_written < 0 && errno == EINTR)
   676   return bytes_written;
   680                           buffer2, start2, len2);
   711   start = _dbus_string_get_length (buffer);
   723   bytes_read = read (fd, data, count);
   769   data = _dbus_string_get_const_data_len (buffer, start, len);
   773   bytes_written = write (fd, data, len);
   775   if (bytes_written < 0 && errno == EINTR)
   779   if (bytes_written > 0)
   783   return bytes_written;
   823     struct iovec vectors[2];
   828     data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
   831       data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
   839     vectors[0].iov_base = (
char*) data1;
   840     vectors[0].iov_len = len1;
   841     vectors[1].iov_base = (
char*) data2;
   842     vectors[1].iov_len = len2;
   846     bytes_written = writev (fd,
   850     if (bytes_written < 0 && errno == EINTR)
   853     return bytes_written;
   860     if (ret1 == len1 && buffer2 != 
NULL)
   874 #define _DBUS_MAX_SUN_PATH_LENGTH 99   912   struct sockaddr_un addr;
   914   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
   916   _dbus_verbose (
"connecting to unix socket %s abstract=%d\n",
   920   if (!_dbus_open_unix_socket (&fd, error))
   922       _DBUS_ASSERT_ERROR_IS_SET(error);
   925   _DBUS_ASSERT_ERROR_IS_CLEAR(error);
   928   addr.sun_family = AF_UNIX;
   929   path_len = strlen (path);
   933 #ifdef HAVE_ABSTRACT_SOCKETS   934       addr.sun_path[0] = 
'\0'; 
   937       if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
   940                       "Abstract socket name too long\n");
   945       strncpy (&addr.sun_path[1], path, path_len);
   949                       "Operating system does not support abstract socket namespace\n");
   956       if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
   959                       "Socket name too long\n");
   964       strncpy (addr.sun_path, path, path_len);
   967   if (connect (fd, (
struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (
struct sockaddr_un, sun_path) + path_len) < 0)
   971                       "Failed to connect to socket %s: %s",
   972                       path, _dbus_strerror (errno));
   978   if (!_dbus_set_fd_nonblocking (fd, error))
   980       _DBUS_ASSERT_ERROR_IS_SET (error);
  1011   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  1013   _dbus_verbose (
"connecting to process %s\n", path);
  1016   retval = socketpair (AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fds);
  1017   cloexec_done = (retval >= 0);
  1019   if (retval < 0 && (errno == EINVAL || errno == EPROTOTYPE))
  1022       retval = socketpair (AF_UNIX, SOCK_STREAM, 0, fds);
  1029                       "Failed to create socket pair: %s",
  1030                       _dbus_strerror (errno));
  1045                       "Failed to fork() to call %s: %s",
  1046                       path, _dbus_strerror (errno));
  1057       dup2 (fds[1], STDIN_FILENO);
  1058       dup2 (fds[1], STDOUT_FILENO);
  1060       if (fds[1] != STDIN_FILENO &&
  1061           fds[1] != STDOUT_FILENO)
  1069       execvp (path, argv);
  1071       fprintf (stderr, 
"Failed to execute process %s: %s\n", path, _dbus_strerror (errno));
  1079   if (!_dbus_set_fd_nonblocking (fds[0], error))
  1081       _DBUS_ASSERT_ERROR_IS_SET (error);
  1113   struct sockaddr_un addr;
  1116   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  1118   _dbus_verbose (
"listening on unix socket %s abstract=%d\n",
  1121   if (!_dbus_open_unix_socket (&listen_fd, error))
  1123       _DBUS_ASSERT_ERROR_IS_SET(error);
  1126   _DBUS_ASSERT_ERROR_IS_CLEAR(error);
  1129   addr.sun_family = AF_UNIX;
  1130   path_len = strlen (path);
  1134 #ifdef HAVE_ABSTRACT_SOCKETS  1138       addr.sun_path[0] = 
'\0'; 
  1141       if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
  1144                       "Abstract socket name too long\n");
  1149       strncpy (&addr.sun_path[1], path, path_len);
  1153                       "Operating system does not support abstract socket namespace\n");
  1173         if (stat (path, &sb) == 0 &&
  1174             S_ISSOCK (sb.st_mode))
  1178       if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
  1181                       "Socket name too long\n");
  1186       strncpy (addr.sun_path, path, path_len);
  1189   if (bind (listen_fd, (
struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (
struct sockaddr_un, sun_path) + path_len) < 0)
  1192                       "Failed to bind socket \"%s\": %s",
  1193                       path, _dbus_strerror (errno));
  1198   if (listen (listen_fd, 30 ) < 0)
  1201                       "Failed to listen on socket \"%s\": %s",
  1202                       path, _dbus_strerror (errno));
  1207   if (!_dbus_set_fd_nonblocking (listen_fd, error))
  1209       _DBUS_ASSERT_ERROR_IS_SET (error);
  1217   if (!
abstract && chmod (path, 0777) < 0)
  1218     _dbus_warn (
"Could not set mode 0777 on socket %s\n",
  1243   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  1245   n = sd_listen_fds (
TRUE);
  1249                       "Failed to acquire systemd socket: %s",
  1250                       _dbus_strerror (-n));
  1257                       "No socket received.");
  1261   for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
  1263       r = sd_is_socket (fd, AF_UNSPEC, SOCK_STREAM, 1);
  1267                           "Failed to verify systemd socket type: %s",
  1268                           _dbus_strerror (-r));
  1275                           "Passed socket has wrong type.");
  1287                       "Failed to allocate file handle array.");
  1291   for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
  1293       if (!_dbus_set_fd_nonblocking (fd, error))
  1295           _DBUS_ASSERT_ERROR_IS_SET (error);
  1299       new_fds[fd - SD_LISTEN_FDS_START].fd = fd;
  1307   for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
  1316                         "dbus was compiled without systemd support");
  1340     return _dbus_connect_tcp_socket_with_nonce (host, port, family, (
const char*)
NULL, error);
  1344 _dbus_connect_tcp_socket_with_nonce (
const char     *host,
  1347                                      const char     *noncefile,
  1350   int saved_errno = 0;
  1353   struct addrinfo hints;
  1354   struct addrinfo *ai, *tmp;
  1356   _DBUS_ASSERT_ERROR_IS_CLEAR(error);
  1361     hints.ai_family = AF_UNSPEC;
  1362   else if (!strcmp(family, 
"ipv4"))
  1363     hints.ai_family = AF_INET;
  1364   else if (!strcmp(family, 
"ipv6"))
  1365     hints.ai_family = AF_INET6;
  1370                       "Unknown address family %s", family);
  1371       return _dbus_socket_get_invalid ();
  1373   hints.ai_protocol = IPPROTO_TCP;
  1374   hints.ai_socktype = SOCK_STREAM;
  1375   hints.ai_flags = AI_ADDRCONFIG;
  1377   if ((res = getaddrinfo(host, port, &hints, &ai)) != 0)
  1381                       "Failed to lookup host/port: \"%s:%s\": %s (%d)",
  1382                       host, port, gai_strerror(res), res);
  1383       return _dbus_socket_get_invalid ();
  1389       if (!_dbus_open_socket (&fd.fd, tmp->ai_family, SOCK_STREAM, 0, error))
  1392           _DBUS_ASSERT_ERROR_IS_SET(error);
  1393           return _dbus_socket_get_invalid ();
  1395       _DBUS_ASSERT_ERROR_IS_CLEAR(error);
  1397       if (connect (fd.fd, (
struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
  1399           saved_errno = errno;
  1414                       "Failed to connect to socket \"%s:%s\" %s",
  1415                       host, port, _dbus_strerror(saved_errno));
  1416       return _dbus_socket_get_invalid ();
  1419   if (noncefile != 
NULL)
  1424       ret = _dbus_send_nonce (fd, &noncefileStr, error);
  1430           return _dbus_socket_get_invalid ();
  1434   if (!_dbus_set_fd_nonblocking (fd.fd, error))
  1437       return _dbus_socket_get_invalid ();
  1468   int nlisten_fd = 0, res, i;
  1470   struct addrinfo hints;
  1471   struct addrinfo *ai, *tmp;
  1472   unsigned int reuseaddr;
  1475   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  1480     hints.ai_family = AF_UNSPEC;
  1481   else if (!strcmp(family, 
"ipv4"))
  1482     hints.ai_family = AF_INET;
  1483   else if (!strcmp(family, 
"ipv6"))
  1484     hints.ai_family = AF_INET6;
  1489                       "Unknown address family %s", family);
  1493   hints.ai_protocol = IPPROTO_TCP;
  1494   hints.ai_socktype = SOCK_STREAM;
  1495   hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
  1497  redo_lookup_with_port:
  1499   if ((res = getaddrinfo(host, port, &hints, &ai)) != 0 || !ai)
  1503                       "Failed to lookup host/port: \"%s:%s\": %s (%d)",
  1504                       host ? host : 
"*", port, gai_strerror(res), res);
  1511       int fd = -1, tcp_nodelay_on;
  1514       if (!_dbus_open_socket (&fd, tmp->ai_family, SOCK_STREAM, 0, error))
  1516           _DBUS_ASSERT_ERROR_IS_SET(error);
  1519       _DBUS_ASSERT_ERROR_IS_CLEAR(error);
  1522       if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, 
sizeof(reuseaddr))==-1)
  1524           _dbus_warn (
"Failed to set socket option \"%s:%s\": %s",
  1525                       host ? host : 
"*", port, _dbus_strerror (errno));
  1531       if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &tcp_nodelay_on, 
sizeof (tcp_nodelay_on)) == -1)
  1533           _dbus_warn (
"Failed to set TCP_NODELAY socket option \"%s:%s\": %s",
  1534                       host ? host : 
"*", port, _dbus_strerror (errno));
  1537       if (bind (fd, (
struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
  1539           saved_errno = errno;
  1541           if (saved_errno == EADDRINUSE)
  1559                           "Failed to bind socket \"%s:%s\": %s",
  1560                           host ? host : 
"*", port, _dbus_strerror (saved_errno));
  1564       if (listen (fd, 30 ) < 0)
  1566           saved_errno = errno;
  1569                           "Failed to listen on socket \"%s:%s\": %s",
  1570                           host ? host : 
"*", port, _dbus_strerror (saved_errno));
  1577           saved_errno = errno;
  1580                           "Failed to allocate file handle array: %s",
  1581                           _dbus_strerror (saved_errno));
  1584       listen_fd = newlisten_fd;
  1585       listen_fd[nlisten_fd].fd = fd;
  1588       if (!_dbus_string_get_length(retport))
  1594           if (!port || !strcmp(port, 
"0"))
  1597               struct sockaddr_storage addr;
  1601               addrlen = 
sizeof(addr);
  1602               result = getsockname(fd, (
struct sockaddr*) &addr, &addrlen);
  1605                   (res = getnameinfo ((
struct sockaddr*)&addr, addrlen, 
NULL, 0,
  1606                                       portbuf, 
sizeof(portbuf),
  1607                                       NI_NUMERICHOST | NI_NUMERICSERV)) != 0)
  1610                                   "Failed to resolve port \"%s:%s\": %s (%s)",
  1611                                   host ? host : 
"*", port, gai_strerror(res), res);
  1621               port = _dbus_string_get_const_data(retport);
  1623               goto redo_lookup_with_port;
  1644                       "Failed to bind socket \"%s:%s\": %s",
  1645                       host ? host : 
"*", port, _dbus_strerror (errno));
  1649   for (i = 0 ; i < nlisten_fd ; i++)
  1651       if (!_dbus_set_fd_nonblocking (listen_fd[i].fd, error))
  1664   for (i = 0 ; i < nlisten_fd ; i++)
  1671 write_credentials_byte (
int             server_fd,
  1675   char buf[1] = { 
'\0' };
  1676 #if defined(HAVE_CMSGCRED)  1679           char cred[CMSG_SPACE (
sizeof (
struct cmsgcred))];
  1690   msg.msg_control = (caddr_t) &cmsg;
  1691   msg.msg_controllen = CMSG_SPACE (
sizeof (
struct cmsgcred));
  1693   cmsg.hdr.cmsg_len = CMSG_LEN (
sizeof (
struct cmsgcred));
  1694   cmsg.hdr.cmsg_level = SOL_SOCKET;
  1695   cmsg.hdr.cmsg_type = SCM_CREDS;
  1698   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  1702 #if defined(HAVE_CMSGCRED)  1703   bytes_written = sendmsg (server_fd, &msg, 0
  1704 #
if HAVE_DECL_MSG_NOSIGNAL
  1712   if (bytes_written < 0 && errno == EINVAL)
  1715       bytes_written = send (server_fd, buf, 1, 0
  1716 #
if HAVE_DECL_MSG_NOSIGNAL
  1722   if (bytes_written < 0 && errno == EINTR)
  1725   if (bytes_written < 0)
  1728                       "Failed to write credentials byte: %s",
  1729                      _dbus_strerror (errno));
  1732   else if (bytes_written == 0)
  1735                       "wrote zero bytes writing credentials byte");
  1741       _dbus_verbose (
"wrote credentials byte\n");
  1748 add_linux_security_label_to_credentials (
int              client_fd,
  1751 #if defined(__linux__) && defined(SO_PEERSEC)  1753   socklen_t len = 1024;
  1760   while (getsockopt (client_fd, SOL_SOCKET, SO_PEERSEC,
  1761          _dbus_string_get_data (&buf), &len) < 0)
  1765       _dbus_verbose (
"getsockopt failed with %s, len now %lu\n",
  1766                      _dbus_strerror (e), (
unsigned long) len);
  1768       if (e != ERANGE || len <= _dbus_string_get_length_uint (&buf))
  1770           _dbus_verbose (
"Failed to getsockopt(SO_PEERSEC): %s\n",
  1771                          _dbus_strerror (e));
  1783       _dbus_verbose (
"will try again with %lu\n", (
unsigned long) len);
  1788       _dbus_verbose (
"getsockopt(SO_PEERSEC) yielded <= 0 bytes: %lu\n",
  1789                      (
unsigned long) len);
  1793   if (len > _dbus_string_get_length_uint (&buf))
  1795       _dbus_verbose (
"%lu > %u", (
unsigned long) len,
  1796                      _dbus_string_get_length_uint (&buf));
  1800   if (_dbus_string_get_byte (&buf, len - 1) == 0)
  1804       _dbus_verbose (
"subtracting trailing \\0\n");
  1815   if (strlen (_dbus_string_get_const_data (&buf)) != len)
  1820       _dbus_verbose (
"security label from kernel had an embedded \\0, "  1825   _dbus_verbose (
"getsockopt(SO_PEERSEC): %lu bytes excluding \\0: %s\n",
  1826                  (
unsigned long) len,
  1827                  _dbus_string_get_const_data (&buf));
  1830         _dbus_string_get_const_data (&buf)))
  1897 #ifdef HAVE_CMSGCRED  1900     char cred[CMSG_SPACE (
sizeof (
struct cmsgcred))];
  1908   _DBUS_STATIC_ASSERT (
sizeof (pid_t) <= 
sizeof (
dbus_pid_t));
  1909   _DBUS_STATIC_ASSERT (
sizeof (uid_t) <= 
sizeof (
dbus_uid_t));
  1910   _DBUS_STATIC_ASSERT (
sizeof (gid_t) <= 
sizeof (
dbus_gid_t));
  1915   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  1919   iov.iov_base = &buf;
  1926 #if defined(HAVE_CMSGCRED)  1928   msg.msg_control = (caddr_t) &cmsg;
  1929   msg.msg_controllen = CMSG_SPACE (
sizeof (
struct cmsgcred));
  1933   bytes_read = recvmsg (client_fd.fd, &msg, 0);
  1946                       "Failed to read credentials byte: %s",
  1947                       _dbus_strerror (errno));
  1950   else if (bytes_read == 0)
  1956                       "Failed to read credentials byte (zero-length read)");
  1959   else if (buf != 
'\0')
  1962                       "Credentials byte was not nul");
  1966   _dbus_verbose (
"read credentials byte\n");
  1979     struct sockpeercred cr;
  1983     int cr_len = 
sizeof (cr);
  1985     if (getsockopt (client_fd.fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len) != 0)
  1987         _dbus_verbose (
"Failed to getsockopt(SO_PEERCRED): %s\n",
  1988                        _dbus_strerror (errno));
  1990     else if (cr_len != 
sizeof (cr))
  1992         _dbus_verbose (
"Failed to getsockopt(SO_PEERCRED), returned %d bytes, expected %d\n",
  1993                        cr_len, (
int) 
sizeof (cr));
  2000 #elif defined(HAVE_UNPCBID) && defined(LOCAL_PEEREID)  2004     socklen_t cr_len = 
sizeof (cr);
  2006     if (getsockopt (client_fd.fd, 0, LOCAL_PEEREID, &cr, &cr_len) != 0)
  2008         _dbus_verbose (
"Failed to getsockopt(LOCAL_PEEREID): %s\n",
  2009                        _dbus_strerror (errno));
  2011     else if (cr_len != 
sizeof (cr))
  2013         _dbus_verbose (
"Failed to getsockopt(LOCAL_PEEREID), returned %d bytes, expected %d\n",
  2014                        cr_len, (
int) 
sizeof (cr));
  2018         pid_read = cr.unp_pid;
  2019         uid_read = cr.unp_euid;
  2021 #elif defined(HAVE_CMSGCRED)  2030     struct cmsgcred *cred;
  2031     struct cmsghdr *cmsgp;
  2033     for (cmsgp = CMSG_FIRSTHDR (&msg);
  2035          cmsgp = CMSG_NXTHDR (&msg, cmsgp))
  2037         if (cmsgp->cmsg_type == SCM_CREDS &&
  2038             cmsgp->cmsg_level == SOL_SOCKET &&
  2039             cmsgp->cmsg_len >= CMSG_LEN (
sizeof (
struct cmsgcred)))
  2041             cred = (
struct cmsgcred *) CMSG_DATA (cmsgp);
  2042             pid_read = cred->cmcred_pid;
  2043             uid_read = cred->cmcred_euid;
  2048 #elif defined(HAVE_GETPEERUCRED)  2052     ucred_t * ucred = 
NULL;
  2053     if (getpeerucred (client_fd.fd, &ucred) == 0)
  2055         pid_read = ucred_getpid (ucred);
  2056         uid_read = ucred_geteuid (ucred);
  2059         adt_session_data_t *adth = 
NULL;
  2060         adt_export_data_t *data = 
NULL;
  2062         if (adt_start_session (&adth, 
NULL, 0) || (adth == 
NULL))
  2064             _dbus_verbose (
"Failed to adt_start_session(): %s\n", _dbus_strerror (errno));
  2068             if (adt_set_from_ucred (adth, ucred, ADT_NEW))
  2070                 _dbus_verbose (
"Failed to adt_set_from_ucred(): %s\n", _dbus_strerror (errno));
  2074                 size = adt_export_session_data (adth, &data);
  2077                     _dbus_verbose (
"Failed to adt_export_session_data(): %s\n", _dbus_strerror (errno));
  2085             (void) adt_end_session (adth);
  2091         _dbus_verbose (
"Failed to getpeerucred() credentials: %s\n", _dbus_strerror (errno));
  2101 #elif defined(HAVE_GETPEEREID)  2119     if (getpeereid (client_fd.fd, &euid, &egid) == 0)
  2125         _dbus_verbose (
"Failed to getpeereid() credentials: %s\n", _dbus_strerror (errno));
  2129 #warning Socket credentials not supported on this Unix OS  2130 #warning Please tell https://bugs.freedesktop.org/enter_bug.cgi?product=DBus  2136 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \  2137     defined(__linux__) || \  2138     defined(__OpenBSD__) || \  2140 # error Credentials passing not working on this OS is a regression!  2143     _dbus_verbose (
"Socket credentials not supported on this OS\n");
  2147   _dbus_verbose (
"Credentials:"  2158           _DBUS_SET_OOM (error);
  2167           _DBUS_SET_OOM (error);
  2172   if (!add_linux_security_label_to_credentials (client_fd.fd, credentials))
  2174       _DBUS_SET_OOM (error);
  2202   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  2204   if (write_credentials_byte (server_fd.fd, error))
  2223   struct sockaddr addr;
  2229   addrlen = 
sizeof (addr);
  2239   client_fd.fd = accept4 (listen_fd.fd, &addr, &addrlen, SOCK_CLOEXEC);
  2240   cloexec_done = client_fd.fd >= 0;
  2242   if (client_fd.fd < 0 && (errno == ENOSYS || errno == EINVAL))
  2245       client_fd.fd = accept (listen_fd.fd, &addr, &addrlen);
  2248   if (client_fd.fd < 0)
  2254   _dbus_verbose (
"client fd %d accepted\n", client_fd.fd);
  2277   const char *directory;
  2280   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  2282   directory = _dbus_string_get_const_data (dir);
  2284   if (stat (directory, &sb) < 0)
  2287                       "%s", _dbus_strerror (errno));
  2292   if (sb.st_uid != geteuid ())
  2295                      "%s directory is owned by user %lu, not %lu",
  2297                      (
unsigned long) sb.st_uid,
  2298                      (
unsigned long) geteuid ());
  2302   if ((S_IROTH & sb.st_mode) || (S_IWOTH & sb.st_mode) ||
  2303       (S_IRGRP & sb.st_mode) || (S_IWGRP & sb.st_mode))
  2306                      "%s directory is not private to the user", directory);
  2314 fill_user_info_from_passwd (
struct passwd *p,
  2321   info->
uid = p->pw_uid;
  2342   const char *username_c;
  2355   if (username != 
NULL)
  2356     username_c = _dbus_string_get_const_data (username);
  2365 #if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)  2371     struct passwd p_str;
  2374     buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
  2380     if ((
long) buflen <= 0)
  2394 #ifdef HAVE_POSIX_GETPWNAM_R  2396           result = getpwuid_r (uid, &p_str, buf, buflen,
  2399           result = getpwnam_r (username_c, &p_str, buf, buflen,
  2403           p = getpwuid_r (uid, &p_str, buf, buflen);
  2405           p = getpwnam_r (username_c, &p_str, buf, buflen);
  2409         if (result == ERANGE && buflen < 512 * 1024)
  2419     if (result == 0 && p == &p_str)
  2421         if (!fill_user_info_from_passwd (p, info, error))
  2431                         "User \"%s\" unknown or no memory to allocate password entry\n",
  2432                         username_c ? username_c : 
"???");
  2433         _dbus_verbose (
"User %s unknown\n", username_c ? username_c : 
"???");
  2446       p = getpwnam (username_c);
  2450         if (!fill_user_info_from_passwd (p, info, error))
  2458                         "User \"%s\" unknown or no memory to allocate password entry\n",
  2459                         username_c ? username_c : 
"???");
  2460         _dbus_verbose (
"User %s unknown\n", username_c ? username_c : 
"???");
  2469 #ifdef HAVE_GETGROUPLIST  2474     int initial_buf_count;
  2476     initial_buf_count = 17;
  2477     buf_count = initial_buf_count;
  2485     if (getgrouplist (username_c,
  2487                       buf, &buf_count) < 0)
  2503         if (buf_count == initial_buf_count)
  2518         if (getgrouplist (username_c, info->
primary_gid, buf, &buf_count) < 0)
  2522                 _dbus_warn (
"It appears that username \"%s\" is in more than %d groups.\nProceeding with just the first %d groups.",
  2523                             username_c, buf_count, buf_count);
  2529                                 "Failed to get groups for username \"%s\" primary GID "  2532                                 _dbus_strerror (errno));
  2547     for (i = 0; i < buf_count; ++i)
  2570   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  2575   _DBUS_ASSERT_ERROR_IS_SET (error);
  2609   return fill_user_info (info, uid,
  2627   _DBUS_STATIC_ASSERT (
sizeof (pid_t) <= 
sizeof (
dbus_pid_t));
  2628   _DBUS_STATIC_ASSERT (
sizeof (uid_t) <= 
sizeof (
dbus_uid_t));
  2629   _DBUS_STATIC_ASSERT (
sizeof (gid_t) <= 
sizeof (
dbus_gid_t));
  2711   if (_dbus_string_get_length (uid_str) == 0)
  2713       _dbus_verbose (
"UID string was zero length\n");
  2722       _dbus_verbose (
"could not parse string as a UID\n");
  2726   if (end != _dbus_string_get_length (uid_str))
  2728       _dbus_verbose (
"string contained trailing stuff after UID\n");
  2743 static pthread_mutex_t atomic_mutex = PTHREAD_MUTEX_INITIALIZER;
  2756   return __sync_add_and_fetch(&atomic->
value, 1)-1;
  2760   pthread_mutex_lock (&atomic_mutex);
  2761   res = atomic->
value;
  2763   pthread_mutex_unlock (&atomic_mutex);
  2779   return __sync_sub_and_fetch(&atomic->
value, 1)+1;
  2783   pthread_mutex_lock (&atomic_mutex);
  2784   res = atomic->
value;
  2786   pthread_mutex_unlock (&atomic_mutex);
  2803   __sync_synchronize ();
  2804   return atomic->
value;
  2808   pthread_mutex_lock (&atomic_mutex);
  2809   res = atomic->
value;
  2810   pthread_mutex_unlock (&atomic_mutex);
  2827             int         timeout_milliseconds)
  2829 #if defined(HAVE_POLL) && !defined(BROKEN_POLL)  2831   if (timeout_milliseconds < -1)
  2833       timeout_milliseconds = -1;
  2838                timeout_milliseconds);
  2841   fd_set read_set, write_set, err_set;
  2847   FD_ZERO (&read_set);
  2848   FD_ZERO (&write_set);
  2851   for (i = 0; i < n_fds; i++)
  2856         FD_SET (fdp->
fd, &read_set);
  2859         FD_SET (fdp->
fd, &write_set);
  2861       FD_SET (fdp->
fd, &err_set);
  2863       max_fd = MAX (max_fd, fdp->
fd);
  2866   tv.tv_sec = timeout_milliseconds / 1000;
  2867   tv.tv_usec = (timeout_milliseconds % 1000) * 1000;
  2869   ready = select (max_fd + 1, &read_set, &write_set, &err_set,
  2870                   timeout_milliseconds < 0 ? 
NULL : &tv);
  2874       for (i = 0; i < n_fds; i++)
  2880           if (FD_ISSET (fdp->
fd, &read_set))
  2883           if (FD_ISSET (fdp->
fd, &write_set))
  2886           if (FD_ISSET (fdp->
fd, &err_set))
  2906 #ifdef HAVE_MONOTONIC_CLOCK  2908   clock_gettime (CLOCK_MONOTONIC, &ts);
  2911     *tv_sec = ts.tv_sec;
  2913     *tv_usec = ts.tv_nsec / 1000;
  2917   gettimeofday (&t, 
NULL);
  2922     *tv_usec = t.tv_usec;
  2939   gettimeofday (&t, 
NULL);
  2944     *tv_usec = t.tv_usec;
  2959   const char *filename_c;
  2961   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  2963   filename_c = _dbus_string_get_const_data (filename);
  2965   if (mkdir (filename_c, 0700) < 0)
  2967       if (errno == EEXIST)
  2971                       "Failed to create directory %s: %s\n",
  2972                       filename_c, _dbus_strerror (errno));
  2991   const char *filename_c;
  2993   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  2995   filename_c = _dbus_string_get_const_data (filename);
  2997   if (mkdir (filename_c, 0700) < 0)
  3000                       "Failed to create directory %s: %s\n",
  3001                       filename_c, _dbus_strerror (errno));
  3025   if (_dbus_string_get_length (dir) == 0 ||
  3026       _dbus_string_get_length (next_component) == 0)
  3029   dir_ends_in_slash = 
'/' == _dbus_string_get_byte (dir,
  3030                                                     _dbus_string_get_length (dir) - 1);
  3032   file_starts_with_slash = 
'/' == _dbus_string_get_byte (next_component, 0);
  3034   if (dir_ends_in_slash && file_starts_with_slash)
  3038   else if (!(dir_ends_in_slash || file_starts_with_slash))
  3045                             _dbus_string_get_length (dir));
  3049 #define NANOSECONDS_PER_SECOND       1000000000  3051 #define MICROSECONDS_PER_SECOND      1000000  3053 #define MILLISECONDS_PER_SECOND      1000  3055 #define NANOSECONDS_PER_MILLISECOND  1000000  3057 #define MICROSECONDS_PER_MILLISECOND 1000  3066 #ifdef HAVE_NANOSLEEP  3067   struct timespec req;
  3068   struct timespec rem;
  3070   req.tv_sec = milliseconds / MILLISECONDS_PER_SECOND;
  3071   req.tv_nsec = (milliseconds % MILLISECONDS_PER_SECOND) * NANOSECONDS_PER_MILLISECOND;
  3075   while (nanosleep (&req, &rem) < 0 && errno == EINTR)
  3077 #elif defined (HAVE_USLEEP)  3078   usleep (milliseconds * MICROSECONDS_PER_MILLISECOND);
  3080   sleep (MAX (milliseconds / 1000, 1));
  3102   old_len = _dbus_string_get_length (str);
  3106   fd = open (
"/dev/urandom", O_RDONLY);
  3111                       "Could not open /dev/urandom: %s",
  3112                       _dbus_strerror (errno));
  3116   _dbus_verbose (
"/dev/urandom fd %d opened\n", fd);
  3120   if (result != n_bytes)
  3124                         "Could not read /dev/urandom: %s",
  3125                         _dbus_strerror (errno));
  3128                         "Short read from /dev/urandom");
  3135   _dbus_verbose (
"Read %d bytes from /dev/urandom\n",
  3163 _dbus_strerror (
int error_number)
  3167   msg = strerror (error_number);
  3180   signal (SIGPIPE, SIG_IGN);
  3195   val = fcntl (fd, F_GETFD, 0);
  3202   fcntl (fd, F_SETFD, val);
  3216   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  3225                       "Could not close fd %d", fd);
  3246 #ifdef F_DUPFD_CLOEXEC  3249   new_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
  3250   cloexec_done = new_fd >= 0;
  3252   if (new_fd < 0 && errno == EINVAL)
  3255       new_fd = fcntl(fd, F_DUPFD, 3);
  3261                     "Could not duplicate fd %d", fd);
  3265 #ifdef F_DUPFD_CLOEXEC  3286   return _dbus_set_fd_nonblocking (fd.fd, error);
  3290 _dbus_set_fd_nonblocking (
int             fd,
  3295   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  3297   val = fcntl (fd, F_GETFL, 0);
  3301                       "Failed to get flags from file descriptor %d: %s",
  3302                       fd, _dbus_strerror (errno));
  3303       _dbus_verbose (
"Failed to get flags for fd %d: %s\n", fd,
  3304                      _dbus_strerror (errno));
  3308   if (fcntl (fd, F_SETFL, val | O_NONBLOCK) < 0)
  3311                       "Failed to set nonblocking flag of file descriptor %d: %s",
  3312                       fd, _dbus_strerror (errno));
  3313       _dbus_verbose (
"Failed to set fd %d nonblocking: %s\n",
  3314                      fd, _dbus_strerror (errno));
  3330 #if defined (HAVE_BACKTRACE) && defined (DBUS_BUILT_R_DYNAMIC)  3336   bt_size = backtrace (bt, 500);
  3338   syms = backtrace_symbols (bt, bt_size);
  3344       fprintf (stderr, 
"  %s\n", syms[i]);
  3350 #elif defined (HAVE_BACKTRACE) && ! defined (DBUS_BUILT_R_DYNAMIC)  3351   fprintf (stderr, 
"  D-Bus not built with -rdynamic so unable to print a backtrace\n");
  3353   fprintf (stderr, 
"  D-Bus not compiled with backtrace support so unable to print a backtrace\n");
  3375 #ifdef HAVE_SOCKETPAIR  3382   retval = socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fds);
  3383   cloexec_done = retval >= 0;
  3385   if (retval < 0 && (errno == EINVAL || errno == EPROTOTYPE))
  3388       retval = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
  3394                       "Could not create full-duplex pipe");
  3398   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  3409       (!_dbus_set_fd_nonblocking (fds[0], 
NULL) ||
  3410        !_dbus_set_fd_nonblocking (fds[1], 
NULL)))
  3413                       "Could not set full-duplex pipe nonblocking");
  3424   _dbus_verbose (
"full-duplex pipe %d <-> %d\n",
  3429   _dbus_warn (
"_dbus_socketpair() not implemented on this OS\n");
  3431                   "_dbus_socketpair() not implemented on this OS");
  3448   char static_buf[1024];
  3449   int bufsize = 
sizeof (static_buf);
  3453   DBUS_VA_COPY (args_copy, args);
  3454   len = vsnprintf (static_buf, bufsize, format, args_copy);
  3471       DBUS_VA_COPY (args_copy, args);
  3473       if (vsnprintf (static_buf, 1, format, args_copy) == 1)
  3492       DBUS_VA_COPY (args_copy, args);
  3493       len = vsnprintf (buf, bufsize, format, args_copy);
  3518   static const char* tmpdir = 
NULL;
  3530         tmpdir = getenv(
"TMPDIR");
  3536         tmpdir = getenv(
"TMP");
  3538         tmpdir = getenv(
"TEMP");
  3552 #if defined(DBUS_ENABLE_X11_AUTOLAUNCH) || defined(DBUS_ENABLE_LAUNCHD)  3573 _read_subprocess_line_argv (
const char *progpath,
  3579   int result_pipe[2] = { -1, -1 };
  3580   int errors_pipe[2] = { -1, -1 };
  3587   sigset_t new_set, old_set;
  3589   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  3596   sigemptyset (&new_set);
  3597   sigaddset (&new_set, SIGCHLD);
  3598   sigprocmask (SIG_BLOCK, &new_set, &old_set);
  3600   orig_len = _dbus_string_get_length (result);
  3604   if (pipe (result_pipe) < 0)
  3607                       "Failed to create a pipe to call %s: %s",
  3608                       progpath, _dbus_strerror (errno));
  3609       _dbus_verbose (
"Failed to create a pipe to call %s: %s\n",
  3610                      progpath, _dbus_strerror (errno));
  3613   if (pipe (errors_pipe) < 0)
  3616                       "Failed to create a pipe to call %s: %s",
  3617                       progpath, _dbus_strerror (errno));
  3618       _dbus_verbose (
"Failed to create a pipe to call %s: %s\n",
  3619                      progpath, _dbus_strerror (errno));
  3627                       "Failed to fork() to call %s: %s",
  3628                       progpath, _dbus_strerror (errno));
  3629       _dbus_verbose (
"Failed to fork() to call %s: %s\n",
  3630                      progpath, _dbus_strerror (errno));
  3639       fd = open (
"/dev/null", O_RDWR);
  3644       _dbus_verbose (
"/dev/null fd %d opened\n", fd);
  3648       close (errors_pipe[READ_END]);
  3650       if (dup2 (fd, 0) == -1) 
  3652       if (dup2 (result_pipe[
WRITE_END], 1) == -1) 
  3654       if (dup2 (errors_pipe[WRITE_END], 2) == -1) 
  3659       sigprocmask (SIG_SETMASK, &old_set, 
NULL);
  3662       if (progpath[0] == 
'/')
  3664           execv (progpath, argv);
  3673             execvp (strrchr (progpath, 
'/')+1, argv);
  3676         execvp (progpath, argv);
  3684   close (errors_pipe[WRITE_END]);
  3698       ret = waitpid (pid, &status, 0);
  3700   while (ret == -1 && errno == EINTR);
  3704   if (!WIFEXITED (status) || WEXITSTATUS (status) != 0 )
  3710           _DBUS_SET_OOM (error);
  3722       if (_dbus_string_get_length (&error_message) > 0)
  3724                         "%s terminated abnormally with the following error: %s",
  3725                         progpath, _dbus_string_get_data (&error_message));
  3728                         "%s terminated abnormally without any error message",
  3736   sigprocmask (SIG_SETMASK, &old_set, 
NULL);
  3739     _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  3741     _DBUS_ASSERT_ERROR_IS_SET (error);
  3743   if (result_pipe[0] != -1)
  3744     close (result_pipe[0]);
  3745   if (result_pipe[1] != -1)
  3746     close (result_pipe[1]);
  3747   if (errors_pipe[0] != -1)
  3748     close (errors_pipe[0]);
  3749   if (errors_pipe[1] != -1)
  3750     close (errors_pipe[1]);
  3773 #ifdef DBUS_ENABLE_X11_AUTOLAUNCH  3777   const char *display;
  3787                             "Unable to autolaunch when setuid");
  3791   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  3804   if (display == 
NULL || display[0] == 
'\0')
  3807           "Unable to autolaunch a dbus-daemon without a $DISPLAY for X11");
  3813       _DBUS_SET_OOM (error);
  3822 #ifdef DBUS_ENABLE_EMBEDDED_TESTS  3824     progpath = TEST_BUS_LAUNCH_BINARY;
  3827     progpath = DBUS_BINDIR 
"/dbus-launch";
  3834   argv[i] = 
"dbus-launch";
  3836   argv[i] = 
"--autolaunch";
  3838   argv[i] = _dbus_string_get_data (&uuid);
  3840   argv[i] = 
"--binary-syntax";
  3842   argv[i] = 
"--close-stderr";
  3849   retval = _read_subprocess_line_argv (progpath,
  3851                                        argv, address, error);
  3858       "Using X11 for dbus-daemon autolaunch was disabled at compile time, "  3859       "set your DBUS_SESSION_BUS_ADDRESS instead");
  3912   if (!create_if_not_found)
  3934                              const char *launchd_env_var,
  3937 #ifdef DBUS_ENABLE_LAUNCHD  3941   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  3946                             "Unable to find launchd socket when setuid");
  3951   argv[i] = 
"launchctl";
  3955   argv[i] = (
char*)launchd_env_var;
  3962   if (!_read_subprocess_line_argv(argv[0], 
TRUE, argv, socket_path, error))
  3968   if (_dbus_string_get_length(socket_path) == 0)
  3978                 "can't lookup socket from launchd; launchd support not compiled in");
  3983 #ifdef DBUS_ENABLE_LAUNCHD  3993                             "Unable to find launchd socket when setuid");
  3999       _DBUS_SET_OOM (error);
  4014                 "launchd did not provide a socket path, "  4015                 "verify that org.freedesktop.dbus-session.plist is loaded!");
  4021       _DBUS_SET_OOM (error);
  4026                           _dbus_string_get_length (address)))
  4028       _DBUS_SET_OOM (error);
  4043   const char *runtime_dir = 
_dbus_getenv (
"XDG_RUNTIME_DIR");
  4048   if (runtime_dir == 
NULL)
  4050       _dbus_verbose (
"XDG_RUNTIME_DIR not found in environment");
  4057       _DBUS_SET_OOM (error);
  4063       _DBUS_SET_OOM (error);
  4067   if (lstat (_dbus_string_get_const_data (&user_bus_path), &stbuf) == -1)
  4069       _dbus_verbose (
"XDG_RUNTIME_DIR/bus not available: %s",
  4070                      _dbus_strerror (errno));
  4076   if (stbuf.st_uid != getuid ())
  4078       _dbus_verbose (
"XDG_RUNTIME_DIR/bus owned by uid %ld, not our uid %ld",
  4079                      (
long) stbuf.st_uid, (
long) getuid ());
  4085   if ((stbuf.st_mode & S_IFMT) != S_IFSOCK)
  4087       _dbus_verbose (
"XDG_RUNTIME_DIR/bus is not a socket: st_mode = 0o%lo",
  4088                      (
long) stbuf.st_mode);
  4097       _DBUS_SET_OOM (error);
  4133 #ifdef DBUS_ENABLE_LAUNCHD  4135   return _dbus_lookup_session_address_launchd (address, error);
  4139   if (!_dbus_lookup_user_bus (supported, address, error))
  4141   else if (*supported)
  4199 #ifdef DBUS_ENABLE_EMBEDDED_TESTS  4201     const char *
override;
  4204     if (
override != 
NULL && *
override != 
'\0')
  4210         _dbus_verbose (
"Using fake homedir for testing: %s\n",
  4211                        _dbus_string_get_const_data (&homedir));
  4218         if (!already_warned)
  4220             _dbus_warn (
"Using your real home directory for testing, set DBUS_TEST_HOMEDIR to avoid\n");
  4221             already_warned = 
TRUE;
  4233                           directory, _dbus_string_get_length (directory))) {
  4247 _dbus_daemon_publish_session_bus_address (
const char* addr,
  4255 _dbus_daemon_unpublish_session_bus_address (
void)
  4269   return e == EAGAIN || e == EWOULDBLOCK;
  4283   const char *filename_c;
  4285   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
  4287   filename_c = _dbus_string_get_const_data (filename);
  4289   if (rmdir (filename_c) != 0)
  4292                       "Failed to remove directory %s: %s\n",
  4293                       filename_c, _dbus_strerror (errno));
  4313     struct sockaddr_storage storage;
  4314     struct sockaddr_un un;
  4317   socklen_t sa_len = 
sizeof(sa_buf);
  4321   if (getsockname(fd.fd, &sa_buf.sa, &sa_len) < 0)
  4324   return sa_buf.sa.sa_family == AF_UNIX;
  4347   d = opendir (
"/proc/self/fd");
  4352           struct dirent buf, *de;
  4357           k = readdir_r (d, &buf, &de);
  4361           if (de->d_name[0] == 
'.')
  4365           l = strtol (de->d_name, &e, 10);
  4366           if (errno != 0 || e == 
NULL || *e != 
'\0')
  4373           if (fd == dirfd (d))
  4384   maxfds = sysconf (_SC_OPEN_MAX);
  4393   for (i = 3; i < maxfds; i++)
  4412 #if 0 && defined(HAVE_LIBC_ENABLE_SECURE)  4415     extern int __libc_enable_secure;
  4416     return __libc_enable_secure;
  4418 #elif defined(HAVE_ISSETUGID)  4420   return issetugid ();
  4422   uid_t ruid, euid, suid; 
  4423   gid_t rgid, egid, sgid; 
  4430   if (_DBUS_UNLIKELY (!check_setuid_initialised))
  4432 #ifdef HAVE_GETRESUID  4433       if (getresuid (&ruid, &euid, &suid) != 0 ||
  4434           getresgid (&rgid, &egid, &sgid) != 0)
  4437           suid = ruid = getuid ();
  4438           sgid = rgid = getgid ();
  4443       check_setuid_initialised = 
TRUE;
  4444       is_setuid = (ruid != euid || ruid != suid ||
  4445                    rgid != egid || rgid != sgid);
  4466       struct sockaddr_storage storage;
  4467       struct sockaddr_un un;
  4468       struct sockaddr_in ipv4;
  4469       struct sockaddr_in6 ipv6;
  4471   char hostip[INET6_ADDRSTRLEN];
  4472   int size = 
sizeof (socket);
  4475   if (getsockname (fd.fd, &socket.sa, &size))
  4478   switch (socket.sa.sa_family)
  4481       if (socket.un.sun_path[0]==
'\0')
  4497       if (inet_ntop (AF_INET, &socket.ipv4.sin_addr, hostip, sizeof (hostip)))
  4499                                         hostip, ntohs (socket.ipv4.sin_port)))
  4505       if (inet_ntop (AF_INET6, &socket.ipv6.sin6_addr, hostip, sizeof (hostip)))
  4507                                         ntohs (socket.ipv6.sin6_port)) &&
  4515                       "Failed to read address from socket: Unknown socket type.");
  4521                   "Failed to open socket: %s",
  4522                   _dbus_strerror (errno));
  4527 _dbus_save_socket_errno (
void)
  4533 _dbus_restore_socket_errno (
int saved_errno)
  4535   errno = saved_errno;
 dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString. 
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_parse_int(const DBusString *str, int start, long *value_return, int *end_return)
Parses an integer contained in a DBusString. 
An atomic integer safe to increment or decrement from multiple threads. 
dbus_uid_t _dbus_credentials_get_unix_uid(DBusCredentials *credentials)
Gets the UNIX user ID in the credentials, or DBUS_UID_UNSET if the credentials object doesn't contain...
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_append_uint(DBusString *str, unsigned long value)
Appends an unsigned integer to a DBusString. 
#define NULL
A null pointer, defined appropriately for C or C++. 
#define DBUS_ERROR_SPAWN_EXEC_FAILED
While starting a new process, the exec() call failed. 
volatile dbus_int32_t value
Value of the atomic integer. 
dbus_bool_t _dbus_check_dir_is_private_to_user(DBusString *dir, DBusError *error)
Checks to make sure the given directory is private to the user. 
void _dbus_close_all(void)
Closes all file descriptors except the first three (i.e. 
void * dbus_realloc(void *memory, size_t bytes)
Resizes a block of memory previously allocated by dbus_malloc() or dbus_malloc0(). 
dbus_bool_t _dbus_string_lengthen(DBusString *str, int additional_length)
Makes a string longer by the given number of bytes. 
dbus_bool_t _dbus_ensure_directory(const DBusString *filename, DBusError *error)
Creates a directory; succeeds if the directory is created or already existed. 
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0(). 
dbus_bool_t _dbus_socketpair(DBusSocket *fd1, DBusSocket *fd2, dbus_bool_t blocking, DBusError *error)
Creates pair of connect sockets (as in socketpair()). 
int _dbus_write(int fd, const DBusString *buffer, int start, int len)
Thin wrapper around the write() system call that writes a part of a DBusString and handles EINTR for ...
dbus_bool_t _dbus_ensure_standard_fds(DBusEnsureStandardFdsFlags flags, const char **error_str_p)
Ensure that the standard file descriptors stdin, stdout and stderr are open, by opening /dev/null if ...
#define DBUS_ERROR_NOT_SUPPORTED
Requested operation isn't supported (like ENOSYS on UNIX). 
#define dbus_new(type, count)
Safe macro for using dbus_malloc(). 
#define DBUS_GID_FORMAT
an appropriate printf format for dbus_gid_t 
#define DBUS_PID_FORMAT
an appropriate printf format for dbus_pid_t 
dbus_bool_t _dbus_generate_uuid(DBusGUID *uuid, DBusError *error)
Generates a new UUID. 
dbus_bool_t _dbus_get_local_machine_uuid_encoded(DBusString *uuid_str, DBusError *error)
Gets the hex-encoded UUID of the machine this function is executed on. 
#define _dbus_assert(condition)
Aborts with an error message if the condition is false. 
dbus_bool_t _dbus_append_address_from_socket(DBusSocket fd, DBusString *address, DBusError *error)
Read the address from the socket and append it to the string. 
dbus_bool_t _dbus_check_setuid(void)
NOTE: If you modify this function, please also consider making the corresponding change in GLib...
void _dbus_user_database_flush_system(void)
Flushes the system global user database;. 
void dbus_error_free(DBusError *error)
Frees an error that's been set (or just initialized), then reinitializes the error as in dbus_error_i...
dbus_gid_t primary_gid
GID. 
dbus_bool_t _dbus_credentials_add_linux_security_label(DBusCredentials *credentials, const char *label)
Add a Linux security label, as used by LSMs such as SELinux, Smack and AppArmor, to the credentials...
A globally unique ID ; we have one for each DBusServer, and also one for each machine with libdbus in...
dbus_pid_t _dbus_getpid(void)
Gets our process ID. 
#define _DBUS_POLLIN
There is data to read. 
dbus_bool_t _dbus_concat_dir_and_file(DBusString *dir, const DBusString *next_component)
Appends the given filename to the given directory. 
char * _dbus_string_get_data_len(DBusString *str, int start, int len)
Gets a sub-portion of the raw character buffer from the string. 
int _dbus_read_socket(DBusSocket fd, DBusString *buffer, int count)
Like _dbus_read(), but only works on sockets so is available on Windows. 
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string. 
#define DBUS_ERROR_IO_ERROR
Something went wrong reading or writing to a socket, for example. 
int _dbus_dup(int fd, DBusError *error)
Duplicates a file descriptor. 
void _dbus_string_shorten(DBusString *str, int length_to_remove)
Makes a string shorter by the given number of bytes. 
short events
Events to poll for. 
dbus_bool_t _dbus_string_copy(const DBusString *source, int start, DBusString *dest, int insert_at)
Like _dbus_string_move(), but does not delete the section of the source string that's copied to the d...
#define DBUS_PID_UNSET
an invalid PID used to represent an uninitialized dbus_pid_t field 
dbus_bool_t _dbus_send_credentials_socket(DBusSocket server_fd, DBusError *error)
Sends a single nul byte with our UNIX credentials as ancillary data. 
dbus_bool_t _dbus_close_socket(DBusSocket fd, DBusError *error)
Closes a socket. 
void _dbus_credentials_clear(DBusCredentials *credentials)
Clear all credentials in the object. 
#define DBUS_UID_UNSET
an invalid UID used to represent an uninitialized dbus_uid_t field 
dbus_bool_t _dbus_parse_uid(const DBusString *uid_str, dbus_uid_t *uid)
Gets a UID from a UID string. 
dbus_bool_t _dbus_get_autolaunch_address(const char *scope, DBusString *address, DBusError *error)
Returns the address of a new session bus. 
const char * _dbus_error_from_errno(int error_number)
Converts a UNIX errno, or Windows errno or WinSock error value into a DBusError name. 
dbus_bool_t _dbus_user_info_fill(DBusUserInfo *info, const DBusString *username, DBusError *error)
Gets user info for the given username. 
dbus_bool_t _dbus_homedir_from_uid(dbus_uid_t uid, DBusString *homedir)
Gets the home directory for the given user. 
unsigned long dbus_pid_t
A process ID. 
int _dbus_read_socket_with_unix_fds(DBusSocket fd, DBusString *buffer, int count, int *fds, int *n_fds)
Like _dbus_read_socket() but also tries to read unix fds from the socket. 
dbus_gid_t * group_ids
Groups IDs, including above primary group. 
dbus_bool_t _dbus_lookup_launchd_socket(DBusString *socket_path, const char *launchd_env_var, DBusError *error)
quries launchd for a specific env var which holds the socket path. 
void * dbus_malloc(size_t bytes)
Allocates the given number of bytes, as with standard malloc(). 
dbus_bool_t _dbus_append_user_from_current_process(DBusString *str)
Append to the string the identity we would like to have when we authenticate, on UNIX this is the cur...
dbus_bool_t _dbus_credentials_are_anonymous(DBusCredentials *credentials)
Checks whether a credentials object contains a user identity. 
dbus_bool_t _dbus_get_is_errno_eagain_or_ewouldblock(int e)
See if errno is EAGAIN or EWOULDBLOCK (this has to be done differently for Winsock so is abstracted) ...
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE. 
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string. 
int n_group_ids
Size of group IDs array. 
int _dbus_listen_systemd_sockets(DBusSocket **fds, DBusError *error)
Acquires one or more sockets passed in from systemd. 
#define _DBUS_POLLOUT
Writing now will not block. 
void _dbus_warn(const char *format,...)
Prints a warning message to stderr. 
int _dbus_write_socket_two(DBusSocket fd, const DBusString *buffer1, int start1, int len1, const DBusString *buffer2, int start2, int len2)
Like _dbus_write_two() but only works on sockets and is thus available on Windows. 
DBusSocket _dbus_accept(DBusSocket listen_fd)
Accepts a connection on a listening socket. 
dbus_bool_t _dbus_string_init_preallocated(DBusString *str, int allocate_size)
Initializes a string that can be up to the given allocation size before it has to realloc...
dbus_int32_t _dbus_atomic_inc(DBusAtomic *atomic)
Atomically increments an integer. 
int _dbus_read(int fd, DBusString *buffer, int count)
Thin wrapper around the read() system call that appends the data it reads to the DBusString buffer...
dbus_bool_t _dbus_string_append_printf(DBusString *str, const char *format,...)
Appends a printf-style formatted string to the DBusString. 
dbus_bool_t _dbus_append_keyring_directory_for_credentials(DBusString *directory, DBusCredentials *credentials)
Appends the directory in which a keyring for the given credentials should be stored. 
dbus_bool_t _dbus_read_credentials_socket(DBusSocket client_fd, DBusCredentials *credentials, DBusError *error)
Reads a single byte which must be nul (an error occurs otherwise), and reads unix credentials if avai...
dbus_bool_t _dbus_create_directory(const DBusString *filename, DBusError *error)
Creates a directory. 
dbus_bool_t _dbus_delete_directory(const DBusString *filename, DBusError *error)
Removes a directory; Directory must be empty. 
Object representing an exception. 
dbus_bool_t _dbus_address_append_escaped(DBusString *escaped, const DBusString *unescaped)
Appends an escaped version of one string to another string, using the D-Bus address escaping mechanis...
void _dbus_get_monotonic_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday(). 
int _dbus_listen_tcp_socket(const char *host, const char *port, const char *family, DBusString *retport, DBusSocket **fds_p, DBusError *error)
Creates a socket and binds it to the given path, then listens on the socket. 
void _dbus_disable_sigpipe(void)
signal (SIGPIPE, SIG_IGN); 
#define DBUS_ERROR_BAD_ADDRESS
A D-Bus bus address was malformed. 
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError. 
dbus_bool_t _dbus_credentials_add_adt_audit_data(DBusCredentials *credentials, void *audit_data, dbus_int32_t size)
Add ADT audit data to the credentials. 
#define _DBUS_N_ELEMENTS(array)
Computes the number of elements in a fixed-size array using sizeof(). 
void _dbus_flush_caches(void)
Called when the bus daemon is signaled to reload its configuration; any caches should be nuked...
int _dbus_connect_exec(const char *path, char *const argv[], DBusError *error)
Creates a UNIX domain socket and connects it to the specified process to execute. ...
const char * _dbus_get_tmpdir(void)
Gets the temporary files directory by inspecting the environment variables TMPDIR, TMP, and TEMP in that order. 
dbus_bool_t _dbus_string_append_byte(DBusString *str, unsigned char byte)
Appends a single byte to the string, returning FALSE if not enough memory. 
#define _DBUS_UNLOCK(name)
Unlocks a global lock. 
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(). 
#define DBUS_GID_UNSET
an invalid GID used to represent an uninitialized dbus_gid_t field 
dbus_uid_t _dbus_geteuid(void)
Gets our effective UID. 
dbus_bool_t _dbus_credentials_add_from_current_process(DBusCredentials *credentials)
Adds the credentials of the current process to the passed-in credentials object. 
#define TRUE
Expands to "1". 
DBusPollable fd
File descriptor. 
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called. 
dbus_bool_t _dbus_credentials_add_pid(DBusCredentials *credentials, dbus_pid_t pid)
Add a UNIX process ID to the credentials. 
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more. 
#define READ_END
Helps remember which end of the pipe is which. 
#define DBUS_UID_FORMAT
an appropriate printf format for dbus_uid_t 
dbus_bool_t _dbus_read_uuid_file(const DBusString *filename, DBusGUID *uuid, dbus_bool_t create_if_not_found, DBusError *error)
Reads (and optionally writes) a uuid to a file. 
char * homedir
Home directory. 
void _dbus_exit(int code)
Exit the process, returning the given value. 
unsigned long _dbus_pid_for_log(void)
The only reason this is separate from _dbus_getpid() is to allow it on Windows for logging but not fo...
void _dbus_fd_set_close_on_exec(int fd)
Sets the file descriptor to be close on exec. 
DBusSocket _dbus_connect_tcp_socket(const char *host, const char *port, const char *family, DBusError *error)
Creates a socket and connects to a socket at the given host and port. 
dbus_int32_t _dbus_atomic_dec(DBusAtomic *atomic)
Atomically decrement an integer. 
dbus_uid_t _dbus_getuid(void)
Gets our UID. 
dbus_bool_t _dbus_generate_random_bytes(DBusString *str, int n_bytes, DBusError *error)
Generates the given number of securely random bytes, using the best mechanism we can come up with...
dbus_bool_t _dbus_user_info_fill_uid(DBusUserInfo *info, dbus_uid_t uid, DBusError *error)
Gets user info for the given user ID. 
dbus_bool_t _dbus_set_socket_nonblocking(DBusSocket fd, DBusError *error)
Sets a file descriptor to be nonblocking. 
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation. 
dbus_bool_t _dbus_lookup_session_address(dbus_bool_t *supported, DBusString *address, DBusError *error)
Determines the address of the session bus by querying a platform-specific method. ...
dbus_bool_t _dbus_close(int fd, DBusError *error)
Closes a file descriptor. 
#define FALSE
Expands to "0". 
dbus_bool_t _dbus_read_local_machine_uuid(DBusGUID *machine_id, dbus_bool_t create_if_not_found, DBusError *error)
Reads the uuid of the machine we're running on from the dbus configuration. 
dbus_bool_t _dbus_write_uuid_file(const DBusString *filename, const DBusGUID *uuid, DBusError *error)
Write the give UUID to a file. 
void _dbus_print_backtrace(void)
On GNU libc systems, print a crude backtrace to stderr. 
void dbus_set_error_const(DBusError *error, const char *name, const char *message)
Assigns an error name and message to a DBusError. 
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string. 
#define _DBUS_LOCK(name)
Locks a global lock, initializing it first if necessary. 
int _dbus_write_socket(DBusSocket fd, const DBusString *buffer, int start, int len)
Like _dbus_write(), but only supports sockets and is thus available on Windows. 
int _dbus_write_two(int fd, const DBusString *buffer1, int start1, int len1, const DBusString *buffer2, int start2, int len2)
Like _dbus_write() but will use writev() if possible to write both buffers in sequence. 
dbus_int32_t _dbus_atomic_get(DBusAtomic *atomic)
Atomically get the value of an integer. 
void _dbus_sleep_milliseconds(int milliseconds)
Sleeps the given number of milliseconds. 
DBUS_PRIVATE_EXPORT void _dbus_verbose_bytes_of_string(const DBusString *str, int start, int len)
Dump the given part of the string to verbose log. 
#define WRITE_END
Helps remember which end of the pipe is which. 
unsigned long dbus_gid_t
A group ID. 
int _dbus_printf_string_upper_bound(const char *format, va_list args)
Measure the length of the given format string and arguments, not including the terminating nul...
char * _dbus_strdup(const char *str)
Duplicates a string. 
#define _DBUS_ZERO(object)
Sets all bits in an object to zero. 
dbus_bool_t _dbus_credentials_add_unix_uid(DBusCredentials *credentials, dbus_uid_t uid)
Add a UNIX user ID to the credentials. 
dbus_bool_t _dbus_socket_can_pass_unix_fd(DBusSocket fd)
Checks whether file descriptors may be passed via the socket. 
const char * _dbus_getenv(const char *varname)
Wrapper for getenv(). 
unsigned long dbus_uid_t
A user ID. 
int _dbus_poll(DBusPollFD *fds, int n_fds, int timeout_milliseconds)
Wrapper for poll(). 
short revents
Events that occurred. 
int _dbus_connect_unix_socket(const char *path, dbus_bool_t abstract, DBusError *error)
Creates a socket and connects it to the UNIX domain socket at the given path. 
dbus_bool_t dbus_error_is_set(const DBusError *error)
Checks whether an error occurred (the error is set). 
int _dbus_listen_unix_socket(const char *path, dbus_bool_t abstract, DBusError *error)
Creates a socket and binds it to the given path, then listens on the socket. 
void _dbus_get_real_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday(). 
Information about a UNIX user. 
#define _DBUS_POLLERR
Error condition.