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> 77 #ifdef HAVE_GETPEERUCRED 89 #include <systemd/sd-daemon.h> 100 #ifndef AI_ADDRCONFIG 101 #define AI_ADDRCONFIG 0 104 #ifndef HAVE_SOCKLEN_T 105 #define socklen_t int 108 #if defined (__sun) || defined (__sun__) 121 # define CMSG_ALIGN(len) _CMSG_DATA_ALIGN (len) 124 # define CMSG_ALIGN(len) (((len) + sizeof (long) - 1) & \ 125 ~(sizeof (long) - 1)) 130 # define CMSG_SPACE(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + \ 135 # define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len)) 156 const char **error_str_p)
158 static int const relevant_flag[] = { DBUS_FORCE_STDIN_NULL,
159 DBUS_FORCE_STDOUT_NULL,
160 DBUS_FORCE_STDERR_NULL };
162 const char *error_str =
"Failed mysteriously";
166 _DBUS_STATIC_ASSERT (STDIN_FILENO == 0);
167 _DBUS_STATIC_ASSERT (STDOUT_FILENO == 1);
168 _DBUS_STATIC_ASSERT (STDERR_FILENO == 2);
171 for (i = STDIN_FILENO; i <= STDERR_FILENO; i++)
177 devnull = open (
"/dev/null", O_RDWR);
181 error_str =
"Failed to open /dev/null";
190 if (devnull != i && (flags & relevant_flag[i]) != 0)
192 if (dup2 (devnull, i) < 0)
194 error_str =
"Failed to dup2 /dev/null onto a standard fd";
205 if (devnull > STDERR_FILENO)
208 if (error_str_p !=
NULL)
209 *error_str_p = error_str;
212 return (error_str ==
NULL);
215 static dbus_bool_t _dbus_set_fd_nonblocking (
int fd,
219 _dbus_open_socket (
int *fd_p,
228 *fd_p = socket (domain, type | SOCK_CLOEXEC, protocol);
229 cloexec_done = *fd_p >= 0;
232 if (*fd_p < 0 && (errno == EINVAL || errno == EPROTOTYPE))
235 *fd_p = socket (domain, type, protocol);
247 _dbus_verbose (
"socket fd %d opened\n", *fd_p);
254 "Failed to open socket: %s",
255 _dbus_strerror (errno));
271 _dbus_open_unix_socket (
int *fd,
274 return _dbus_open_socket(fd, PF_UNIX, SOCK_STREAM, 0, error);
325 #if HAVE_DECL_MSG_NOSIGNAL 329 data = _dbus_string_get_const_data_len (buffer, start, len);
333 bytes_written = send (fd.fd, data, len, MSG_NOSIGNAL);
335 if (bytes_written < 0 && errno == EINTR)
338 return bytes_written;
362 unsigned int *n_fds) {
363 #ifndef HAVE_UNIX_FD_PASSING 381 start = _dbus_string_get_length (buffer);
401 m.msg_controllen = CMSG_SPACE(*n_fds *
sizeof(
int));
405 m.msg_control = alloca(m.msg_controllen);
406 memset(m.msg_control, 0, m.msg_controllen);
412 m.msg_controllen = CMSG_LEN (*n_fds *
sizeof(
int));
416 bytes_read = recvmsg (fd.fd, &m, 0
417 #ifdef MSG_CMSG_CLOEXEC
438 if (m.msg_flags & MSG_CTRUNC)
450 for (cm = CMSG_FIRSTHDR(&m); cm; cm = CMSG_NXTHDR(&m, cm))
451 if (cm->cmsg_level == SOL_SOCKET && cm->cmsg_type == SCM_RIGHTS)
454 int *payload = (
int *) CMSG_DATA (cm);
455 size_t payload_len_bytes = (cm->cmsg_len - CMSG_LEN (0));
456 size_t payload_len_fds = payload_len_bytes /
sizeof (int);
461 _DBUS_STATIC_ASSERT (
sizeof (
size_t) >=
sizeof (
unsigned int));
463 if (_DBUS_LIKELY (payload_len_fds <= (
size_t) *n_fds))
466 fds_to_use = payload_len_fds;
474 fds_to_use = (size_t) *n_fds;
479 for (i = fds_to_use; i < payload_len_fds; i++)
485 memcpy (fds, payload, fds_to_use *
sizeof (
int));
490 *n_fds = (
unsigned int) fds_to_use;
495 for (i = 0; i < fds_to_use; i++)
518 _dbus_write_socket_with_unix_fds(
DBusSocket fd,
525 #ifndef HAVE_UNIX_FD_PASSING 534 return _dbus_write_socket_with_unix_fds_two(fd, buffer, start, len,
NULL, 0, 0, fds, n_fds);
539 _dbus_write_socket_with_unix_fds_two(
DBusSocket fd,
549 #ifndef HAVE_UNIX_FD_PASSING 557 buffer1, start1, len1,
558 buffer2, start2, len2);
571 iov[0].iov_base = (
char*) _dbus_string_get_const_data_len (buffer1, start1, len1);
572 iov[0].iov_len = len1;
576 iov[1].iov_base = (
char*) _dbus_string_get_const_data_len (buffer2, start2, len2);
577 iov[1].iov_len = len2;
582 m.msg_iovlen = buffer2 ? 2 : 1;
586 m.msg_controllen = CMSG_SPACE(n_fds *
sizeof(
int));
587 m.msg_control = alloca(m.msg_controllen);
588 memset(m.msg_control, 0, m.msg_controllen);
590 cm = CMSG_FIRSTHDR(&m);
591 cm->cmsg_level = SOL_SOCKET;
592 cm->cmsg_type = SCM_RIGHTS;
593 cm->cmsg_len = CMSG_LEN(n_fds *
sizeof(
int));
594 memcpy(CMSG_DATA(cm), fds, n_fds *
sizeof(
int));
599 bytes_written = sendmsg (fd.fd, &m, 0
600 #
if HAVE_DECL_MSG_NOSIGNAL
605 if (bytes_written < 0 && errno == EINTR)
609 if (bytes_written > 0)
613 return bytes_written;
639 #if HAVE_DECL_MSG_NOSIGNAL 640 struct iovec vectors[2];
652 data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
655 data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
663 vectors[0].iov_base = (
char*) data1;
664 vectors[0].iov_len = len1;
665 vectors[1].iov_base = (
char*) data2;
666 vectors[1].iov_len = len2;
670 m.msg_iovlen = data2 ? 2 : 1;
674 bytes_written = sendmsg (fd.fd, &m, MSG_NOSIGNAL);
676 if (bytes_written < 0 && errno == EINTR)
679 return bytes_written;
683 buffer2, start2, len2);
714 start = _dbus_string_get_length (buffer);
726 bytes_read = read (fd, data, count);
772 data = _dbus_string_get_const_data_len (buffer, start, len);
776 bytes_written = write (fd, data, len);
778 if (bytes_written < 0 && errno == EINTR)
782 if (bytes_written > 0)
786 return bytes_written;
826 struct iovec vectors[2];
831 data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
834 data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
842 vectors[0].iov_base = (
char*) data1;
843 vectors[0].iov_len = len1;
844 vectors[1].iov_base = (
char*) data2;
845 vectors[1].iov_len = len2;
849 bytes_written = writev (fd,
853 if (bytes_written < 0 && errno == EINTR)
856 return bytes_written;
863 if (ret1 == len1 && buffer2 !=
NULL)
877 #define _DBUS_MAX_SUN_PATH_LENGTH 99 915 struct sockaddr_un addr;
917 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
919 _dbus_verbose (
"connecting to unix socket %s abstract=%d\n",
923 if (!_dbus_open_unix_socket (&fd, error))
925 _DBUS_ASSERT_ERROR_IS_SET(error);
928 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
931 addr.sun_family = AF_UNIX;
932 path_len = strlen (path);
937 addr.sun_path[0] =
'\0';
940 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
943 "Abstract socket name too long\n");
948 strncpy (&addr.sun_path[1], path, path_len);
952 "Operating system does not support abstract socket namespace\n");
959 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
962 "Socket name too long\n");
967 strncpy (addr.sun_path, path, path_len);
970 if (connect (fd, (
struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (
struct sockaddr_un, sun_path) + path_len) < 0)
974 "Failed to connect to socket %s: %s",
975 path, _dbus_strerror (errno));
981 if (!_dbus_set_fd_nonblocking (fd, error))
983 _DBUS_ASSERT_ERROR_IS_SET (error);
1014 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1016 _dbus_verbose (
"connecting to process %s\n", path);
1019 retval = socketpair (AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fds);
1020 cloexec_done = (retval >= 0);
1022 if (retval < 0 && (errno == EINVAL || errno == EPROTOTYPE))
1025 retval = socketpair (AF_UNIX, SOCK_STREAM, 0, fds);
1032 "Failed to create socket pair: %s",
1033 _dbus_strerror (errno));
1048 "Failed to fork() to call %s: %s",
1049 path, _dbus_strerror (errno));
1060 dup2 (fds[1], STDIN_FILENO);
1061 dup2 (fds[1], STDOUT_FILENO);
1063 if (fds[1] != STDIN_FILENO &&
1064 fds[1] != STDOUT_FILENO)
1072 execvp (path, (
char *
const *) argv);
1074 fprintf (stderr,
"Failed to execute process %s: %s\n", path, _dbus_strerror (errno));
1082 if (!_dbus_set_fd_nonblocking (fds[0], error))
1084 _DBUS_ASSERT_ERROR_IS_SET (error);
1116 struct sockaddr_un addr;
1119 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1121 _dbus_verbose (
"listening on unix socket %s abstract=%d\n",
1124 if (!_dbus_open_unix_socket (&listen_fd, error))
1126 _DBUS_ASSERT_ERROR_IS_SET(error);
1129 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1132 addr.sun_family = AF_UNIX;
1133 path_len = strlen (path);
1141 addr.sun_path[0] =
'\0';
1144 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
1147 "Abstract socket name too long\n");
1152 strncpy (&addr.sun_path[1], path, path_len);
1156 "Operating system does not support abstract socket namespace\n");
1176 if (stat (path, &sb) == 0 &&
1177 S_ISSOCK (sb.st_mode))
1181 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
1184 "Socket name too long\n");
1189 strncpy (addr.sun_path, path, path_len);
1192 if (bind (listen_fd, (
struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (
struct sockaddr_un, sun_path) + path_len) < 0)
1195 "Failed to bind socket \"%s\": %s",
1196 path, _dbus_strerror (errno));
1201 if (listen (listen_fd, SOMAXCONN ) < 0)
1204 "Failed to listen on socket \"%s\": %s",
1205 path, _dbus_strerror (errno));
1210 if (!_dbus_set_fd_nonblocking (listen_fd, error))
1212 _DBUS_ASSERT_ERROR_IS_SET (error);
1220 if (!
abstract && chmod (path, 0777) < 0)
1221 _dbus_warn (
"Could not set mode 0777 on socket %s", path);
1245 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1247 n = sd_listen_fds (
TRUE);
1251 "Failed to acquire systemd socket: %s",
1252 _dbus_strerror (-n));
1259 "No socket received.");
1263 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1265 r = sd_is_socket (fd, AF_UNSPEC, SOCK_STREAM, 1);
1269 "Failed to verify systemd socket type: %s",
1270 _dbus_strerror (-r));
1277 "Passed socket has wrong type.");
1289 "Failed to allocate file handle array.");
1293 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1295 if (!_dbus_set_fd_nonblocking (fd, error))
1297 _DBUS_ASSERT_ERROR_IS_SET (error);
1301 new_fds[fd - SD_LISTEN_FDS_START].fd = fd;
1309 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1318 "dbus was compiled without systemd support");
1342 return _dbus_connect_tcp_socket_with_nonce (host, port, family, (
const char*)
NULL, error);
1346 _dbus_connect_tcp_socket_with_nonce (
const char *host,
1349 const char *noncefile,
1352 int saved_errno = 0;
1355 struct addrinfo hints;
1356 struct addrinfo *ai, *tmp;
1358 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1363 hints.ai_family = AF_UNSPEC;
1364 else if (!strcmp(family,
"ipv4"))
1365 hints.ai_family = AF_INET;
1366 else if (!strcmp(family,
"ipv6"))
1367 hints.ai_family = AF_INET6;
1372 "Unknown address family %s", family);
1373 return _dbus_socket_get_invalid ();
1375 hints.ai_protocol = IPPROTO_TCP;
1376 hints.ai_socktype = SOCK_STREAM;
1377 hints.ai_flags = AI_ADDRCONFIG;
1379 if ((res = getaddrinfo(host, port, &hints, &ai)) != 0)
1383 "Failed to lookup host/port: \"%s:%s\": %s (%d)",
1384 host, port, gai_strerror(res), res);
1385 return _dbus_socket_get_invalid ();
1391 if (!_dbus_open_socket (&fd.fd, tmp->ai_family, SOCK_STREAM, 0, error))
1394 _DBUS_ASSERT_ERROR_IS_SET(error);
1395 return _dbus_socket_get_invalid ();
1397 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1399 if (connect (fd.fd, (
struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
1401 saved_errno = errno;
1416 "Failed to connect to socket \"%s:%s\" %s",
1417 host, port, _dbus_strerror(saved_errno));
1418 return _dbus_socket_get_invalid ();
1421 if (noncefile !=
NULL)
1426 ret = _dbus_send_nonce (fd, &noncefileStr, error);
1432 return _dbus_socket_get_invalid ();
1436 if (!_dbus_set_fd_nonblocking (fd.fd, error))
1439 return _dbus_socket_get_invalid ();
1470 int nlisten_fd = 0, res, i;
1472 struct addrinfo hints;
1473 struct addrinfo *ai, *tmp;
1474 unsigned int reuseaddr;
1477 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1482 hints.ai_family = AF_UNSPEC;
1483 else if (!strcmp(family,
"ipv4"))
1484 hints.ai_family = AF_INET;
1485 else if (!strcmp(family,
"ipv6"))
1486 hints.ai_family = AF_INET6;
1491 "Unknown address family %s", family);
1495 hints.ai_protocol = IPPROTO_TCP;
1496 hints.ai_socktype = SOCK_STREAM;
1497 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
1499 redo_lookup_with_port:
1501 if ((res = getaddrinfo(host, port, &hints, &ai)) != 0 || !ai)
1505 "Failed to lookup host/port: \"%s:%s\": %s (%d)",
1506 host ? host :
"*", port, gai_strerror(res), res);
1513 int fd = -1, tcp_nodelay_on;
1516 if (!_dbus_open_socket (&fd, tmp->ai_family, SOCK_STREAM, 0, error))
1518 _DBUS_ASSERT_ERROR_IS_SET(error);
1521 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1524 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
sizeof(reuseaddr))==-1)
1526 _dbus_warn (
"Failed to set socket option \"%s:%s\": %s",
1527 host ? host :
"*", port, _dbus_strerror (errno));
1533 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &tcp_nodelay_on,
sizeof (tcp_nodelay_on)) == -1)
1535 _dbus_warn (
"Failed to set TCP_NODELAY socket option \"%s:%s\": %s",
1536 host ? host :
"*", port, _dbus_strerror (errno));
1539 if (bind (fd, (
struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
1541 saved_errno = errno;
1543 if (saved_errno == EADDRINUSE)
1561 "Failed to bind socket \"%s:%s\": %s",
1562 host ? host :
"*", port, _dbus_strerror (saved_errno));
1566 if (listen (fd, 30 ) < 0)
1568 saved_errno = errno;
1571 "Failed to listen on socket \"%s:%s\": %s",
1572 host ? host :
"*", port, _dbus_strerror (saved_errno));
1579 saved_errno = errno;
1582 "Failed to allocate file handle array: %s",
1583 _dbus_strerror (saved_errno));
1586 listen_fd = newlisten_fd;
1587 listen_fd[nlisten_fd].fd = fd;
1590 if (!_dbus_string_get_length(retport))
1596 if (!port || !strcmp(port,
"0"))
1599 struct sockaddr_storage addr;
1603 addrlen =
sizeof(addr);
1604 result = getsockname(fd, (
struct sockaddr*) &addr, &addrlen);
1607 (res = getnameinfo ((
struct sockaddr*)&addr, addrlen,
NULL, 0,
1608 portbuf,
sizeof(portbuf),
1609 NI_NUMERICHOST | NI_NUMERICSERV)) != 0)
1612 "Failed to resolve port \"%s:%s\": %s (%d)",
1613 host ? host :
"*", port, gai_strerror(res), res);
1623 port = _dbus_string_get_const_data(retport);
1625 goto redo_lookup_with_port;
1646 "Failed to bind socket \"%s:%s\": %s",
1647 host ? host :
"*", port, _dbus_strerror (errno));
1651 for (i = 0 ; i < nlisten_fd ; i++)
1653 if (!_dbus_set_fd_nonblocking (listen_fd[i].fd, error))
1666 for (i = 0 ; i < nlisten_fd ; i++)
1673 write_credentials_byte (
int server_fd,
1677 char buf[1] = {
'\0' };
1678 #if defined(HAVE_CMSGCRED) 1681 char cred[CMSG_SPACE (
sizeof (
struct cmsgcred))];
1692 msg.msg_control = (caddr_t) &cmsg;
1693 msg.msg_controllen = CMSG_SPACE (
sizeof (
struct cmsgcred));
1695 cmsg.hdr.cmsg_len = CMSG_LEN (
sizeof (
struct cmsgcred));
1696 cmsg.hdr.cmsg_level = SOL_SOCKET;
1697 cmsg.hdr.cmsg_type = SCM_CREDS;
1700 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1704 #if defined(HAVE_CMSGCRED) 1705 bytes_written = sendmsg (server_fd, &msg, 0
1706 #
if HAVE_DECL_MSG_NOSIGNAL
1714 if (bytes_written < 0 && errno == EINVAL)
1717 bytes_written = send (server_fd, buf, 1, 0
1718 #
if HAVE_DECL_MSG_NOSIGNAL
1724 if (bytes_written < 0 && errno == EINTR)
1727 if (bytes_written < 0)
1730 "Failed to write credentials byte: %s",
1731 _dbus_strerror (errno));
1734 else if (bytes_written == 0)
1737 "wrote zero bytes writing credentials byte");
1743 _dbus_verbose (
"wrote credentials byte\n");
1750 add_linux_security_label_to_credentials (
int client_fd,
1753 #if defined(__linux__) && defined(SO_PEERSEC) 1755 socklen_t len = 1024;
1762 while (getsockopt (client_fd, SOL_SOCKET, SO_PEERSEC,
1763 _dbus_string_get_data (&buf), &len) < 0)
1767 _dbus_verbose (
"getsockopt failed with %s, len now %lu\n",
1768 _dbus_strerror (e), (
unsigned long) len);
1770 if (e != ERANGE || len <= _dbus_string_get_length_uint (&buf))
1772 _dbus_verbose (
"Failed to getsockopt(SO_PEERSEC): %s\n",
1773 _dbus_strerror (e));
1785 _dbus_verbose (
"will try again with %lu\n", (
unsigned long) len);
1790 _dbus_verbose (
"getsockopt(SO_PEERSEC) yielded <= 0 bytes: %lu\n",
1791 (
unsigned long) len);
1795 if (len > _dbus_string_get_length_uint (&buf))
1797 _dbus_verbose (
"%lu > %u", (
unsigned long) len,
1798 _dbus_string_get_length_uint (&buf));
1802 if (_dbus_string_get_byte (&buf, len - 1) == 0)
1806 _dbus_verbose (
"subtracting trailing \\0\n");
1817 if (strlen (_dbus_string_get_const_data (&buf)) != len)
1822 _dbus_verbose (
"security label from kernel had an embedded \\0, " 1827 _dbus_verbose (
"getsockopt(SO_PEERSEC): %lu bytes excluding \\0: %s\n",
1828 (
unsigned long) len,
1829 _dbus_string_get_const_data (&buf));
1832 _dbus_string_get_const_data (&buf)))
1899 #ifdef HAVE_CMSGCRED 1902 char cred[CMSG_SPACE (
sizeof (
struct cmsgcred))];
1910 _DBUS_STATIC_ASSERT (
sizeof (pid_t) <=
sizeof (
dbus_pid_t));
1911 _DBUS_STATIC_ASSERT (
sizeof (uid_t) <=
sizeof (
dbus_uid_t));
1912 _DBUS_STATIC_ASSERT (
sizeof (gid_t) <=
sizeof (
dbus_gid_t));
1917 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1921 iov.iov_base = &buf;
1928 #if defined(HAVE_CMSGCRED) 1930 msg.msg_control = (caddr_t) &cmsg;
1931 msg.msg_controllen = CMSG_SPACE (
sizeof (
struct cmsgcred));
1935 bytes_read = recvmsg (client_fd.fd, &msg, 0);
1948 "Failed to read credentials byte: %s",
1949 _dbus_strerror (errno));
1952 else if (bytes_read == 0)
1958 "Failed to read credentials byte (zero-length read)");
1961 else if (buf !=
'\0')
1964 "Credentials byte was not nul");
1968 _dbus_verbose (
"read credentials byte\n");
1981 struct sockpeercred cr;
1985 socklen_t cr_len =
sizeof (cr);
1987 if (getsockopt (client_fd.fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len) != 0)
1989 _dbus_verbose (
"Failed to getsockopt(SO_PEERCRED): %s\n",
1990 _dbus_strerror (errno));
1992 else if (cr_len !=
sizeof (cr))
1994 _dbus_verbose (
"Failed to getsockopt(SO_PEERCRED), returned %d bytes, expected %d\n",
1995 cr_len, (
int)
sizeof (cr));
2002 #elif defined(HAVE_UNPCBID) && defined(LOCAL_PEEREID) 2006 socklen_t cr_len =
sizeof (cr);
2008 if (getsockopt (client_fd.fd, 0, LOCAL_PEEREID, &cr, &cr_len) != 0)
2010 _dbus_verbose (
"Failed to getsockopt(LOCAL_PEEREID): %s\n",
2011 _dbus_strerror (errno));
2013 else if (cr_len !=
sizeof (cr))
2015 _dbus_verbose (
"Failed to getsockopt(LOCAL_PEEREID), returned %d bytes, expected %d\n",
2016 cr_len, (
int)
sizeof (cr));
2020 pid_read = cr.unp_pid;
2021 uid_read = cr.unp_euid;
2023 #elif defined(HAVE_CMSGCRED) 2032 struct cmsgcred *cred;
2033 struct cmsghdr *cmsgp;
2035 for (cmsgp = CMSG_FIRSTHDR (&msg);
2037 cmsgp = CMSG_NXTHDR (&msg, cmsgp))
2039 if (cmsgp->cmsg_type == SCM_CREDS &&
2040 cmsgp->cmsg_level == SOL_SOCKET &&
2041 cmsgp->cmsg_len >= CMSG_LEN (
sizeof (
struct cmsgcred)))
2043 cred = (
struct cmsgcred *) CMSG_DATA (cmsgp);
2044 pid_read = cred->cmcred_pid;
2045 uid_read = cred->cmcred_euid;
2050 #elif defined(HAVE_GETPEERUCRED) 2054 ucred_t * ucred =
NULL;
2055 if (getpeerucred (client_fd.fd, &ucred) == 0)
2058 adt_session_data_t *adth =
NULL;
2060 pid_read = ucred_getpid (ucred);
2061 uid_read = ucred_geteuid (ucred);
2064 if (adt_start_session (&adth,
NULL, 0) || (adth ==
NULL))
2066 _dbus_verbose (
"Failed to adt_start_session(): %s\n", _dbus_strerror (errno));
2070 if (adt_set_from_ucred (adth, ucred, ADT_NEW))
2072 _dbus_verbose (
"Failed to adt_set_from_ucred(): %s\n", _dbus_strerror (errno));
2076 adt_export_data_t *data =
NULL;
2077 size_t size = adt_export_session_data (adth, &data);
2080 _dbus_verbose (
"Failed to adt_export_session_data(): %s\n", _dbus_strerror (errno));
2088 (void) adt_end_session (adth);
2094 _dbus_verbose (
"Failed to getpeerucred() credentials: %s\n", _dbus_strerror (errno));
2104 #elif defined(HAVE_GETPEEREID) 2122 if (getpeereid (client_fd.fd, &euid, &egid) == 0)
2128 _dbus_verbose (
"Failed to getpeereid() credentials: %s\n", _dbus_strerror (errno));
2132 #warning Socket credentials not supported on this Unix OS 2133 #warning Please tell https://bugs.freedesktop.org/enter_bug.cgi?product=DBus 2139 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \ 2140 defined(__linux__) || \ 2141 defined(__OpenBSD__) || \ 2143 # error Credentials passing not working on this OS is a regression! 2146 _dbus_verbose (
"Socket credentials not supported on this OS\n");
2150 _dbus_verbose (
"Credentials:" 2161 _DBUS_SET_OOM (error);
2170 _DBUS_SET_OOM (error);
2175 if (!add_linux_security_label_to_credentials (client_fd.fd, credentials))
2177 _DBUS_SET_OOM (error);
2205 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2207 if (write_credentials_byte (server_fd.fd, error))
2226 struct sockaddr addr;
2232 addrlen =
sizeof (addr);
2242 client_fd.fd = accept4 (listen_fd.fd, &addr, &addrlen, SOCK_CLOEXEC);
2243 cloexec_done = client_fd.fd >= 0;
2245 if (client_fd.fd < 0 && (errno == ENOSYS || errno == EINVAL))
2248 client_fd.fd = accept (listen_fd.fd, &addr, &addrlen);
2251 if (client_fd.fd < 0)
2257 _dbus_verbose (
"client fd %d accepted\n", client_fd.fd);
2280 const char *directory;
2283 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2285 directory = _dbus_string_get_const_data (dir);
2287 if (stat (directory, &sb) < 0)
2290 "%s", _dbus_strerror (errno));
2295 if (sb.st_uid != geteuid ())
2298 "%s directory is owned by user %lu, not %lu",
2300 (
unsigned long) sb.st_uid,
2301 (
unsigned long) geteuid ());
2305 if ((S_IROTH & sb.st_mode) || (S_IWOTH & sb.st_mode) ||
2306 (S_IRGRP & sb.st_mode) || (S_IWGRP & sb.st_mode))
2309 "%s directory is not private to the user", directory);
2317 fill_user_info_from_passwd (
struct passwd *p,
2324 info->
uid = p->pw_uid;
2345 const char *username_c;
2358 if (username !=
NULL)
2359 username_c = _dbus_string_get_const_data (username);
2368 #if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R) 2374 struct passwd p_str;
2377 buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
2383 if ((
long) buflen <= 0)
2397 #ifdef HAVE_POSIX_GETPWNAM_R 2399 result = getpwuid_r (uid, &p_str, buf, buflen,
2402 result = getpwnam_r (username_c, &p_str, buf, buflen,
2406 p = getpwuid_r (uid, &p_str, buf, buflen);
2408 p = getpwnam_r (username_c, &p_str, buf, buflen);
2412 if (result == ERANGE && buflen < 512 * 1024)
2422 if (result == 0 && p == &p_str)
2424 if (!fill_user_info_from_passwd (p, info, error))
2434 "User \"%s\" unknown or no memory to allocate password entry\n",
2435 username_c ? username_c :
"???");
2436 _dbus_verbose (
"User %s unknown\n", username_c ? username_c :
"???");
2449 p = getpwnam (username_c);
2453 if (!fill_user_info_from_passwd (p, info, error))
2461 "User \"%s\" unknown or no memory to allocate password entry\n",
2462 username_c ? username_c :
"???");
2463 _dbus_verbose (
"User %s unknown\n", username_c ? username_c :
"???");
2472 #ifdef HAVE_GETGROUPLIST 2477 int initial_buf_count;
2479 initial_buf_count = 17;
2480 buf_count = initial_buf_count;
2488 if (getgrouplist (username_c,
2490 buf, &buf_count) < 0)
2506 if (buf_count == initial_buf_count)
2521 if (getgrouplist (username_c, info->
primary_gid, buf, &buf_count) < 0)
2525 _dbus_warn (
"It appears that username \"%s\" is in more than %d groups.\nProceeding with just the first %d groups.",
2526 username_c, buf_count, buf_count);
2532 "Failed to get groups for username \"%s\" primary GID " 2535 _dbus_strerror (errno));
2550 for (i = 0; i < buf_count; ++i)
2573 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2578 _DBUS_ASSERT_ERROR_IS_SET (error);
2612 return fill_user_info (info, uid,
2630 _DBUS_STATIC_ASSERT (
sizeof (pid_t) <=
sizeof (
dbus_pid_t));
2631 _DBUS_STATIC_ASSERT (
sizeof (uid_t) <=
sizeof (
dbus_uid_t));
2632 _DBUS_STATIC_ASSERT (
sizeof (gid_t) <=
sizeof (
dbus_gid_t));
2714 if (_dbus_string_get_length (uid_str) == 0)
2716 _dbus_verbose (
"UID string was zero length\n");
2725 _dbus_verbose (
"could not parse string as a UID\n");
2729 if (end != _dbus_string_get_length (uid_str))
2731 _dbus_verbose (
"string contained trailing stuff after UID\n");
2746 static pthread_mutex_t atomic_mutex = PTHREAD_MUTEX_INITIALIZER;
2759 return __sync_add_and_fetch(&atomic->
value, 1)-1;
2763 pthread_mutex_lock (&atomic_mutex);
2764 res = atomic->
value;
2766 pthread_mutex_unlock (&atomic_mutex);
2782 return __sync_sub_and_fetch(&atomic->
value, 1)+1;
2786 pthread_mutex_lock (&atomic_mutex);
2787 res = atomic->
value;
2789 pthread_mutex_unlock (&atomic_mutex);
2806 __sync_synchronize ();
2807 return atomic->
value;
2811 pthread_mutex_lock (&atomic_mutex);
2812 res = atomic->
value;
2813 pthread_mutex_unlock (&atomic_mutex);
2830 int timeout_milliseconds)
2832 #if defined(HAVE_POLL) && !defined(BROKEN_POLL) 2834 if (timeout_milliseconds < -1)
2836 timeout_milliseconds = -1;
2841 timeout_milliseconds);
2844 fd_set read_set, write_set, err_set;
2850 FD_ZERO (&read_set);
2851 FD_ZERO (&write_set);
2854 for (i = 0; i < n_fds; i++)
2859 FD_SET (fdp->
fd, &read_set);
2862 FD_SET (fdp->
fd, &write_set);
2864 FD_SET (fdp->
fd, &err_set);
2866 max_fd = MAX (max_fd, fdp->
fd);
2869 tv.tv_sec = timeout_milliseconds / 1000;
2870 tv.tv_usec = (timeout_milliseconds % 1000) * 1000;
2872 ready = select (max_fd + 1, &read_set, &write_set, &err_set,
2873 timeout_milliseconds < 0 ?
NULL : &tv);
2877 for (i = 0; i < n_fds; i++)
2883 if (FD_ISSET (fdp->
fd, &read_set))
2886 if (FD_ISSET (fdp->
fd, &write_set))
2889 if (FD_ISSET (fdp->
fd, &err_set))
2909 #ifdef HAVE_MONOTONIC_CLOCK 2911 clock_gettime (CLOCK_MONOTONIC, &ts);
2914 *tv_sec = ts.tv_sec;
2916 *tv_usec = ts.tv_nsec / 1000;
2920 gettimeofday (&t,
NULL);
2925 *tv_usec = t.tv_usec;
2942 gettimeofday (&t,
NULL);
2947 *tv_usec = t.tv_usec;
2962 const char *filename_c;
2964 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2966 filename_c = _dbus_string_get_const_data (filename);
2968 if (mkdir (filename_c, 0700) < 0)
2970 if (errno == EEXIST)
2974 "Failed to create directory %s: %s\n",
2975 filename_c, _dbus_strerror (errno));
2994 const char *filename_c;
2996 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2998 filename_c = _dbus_string_get_const_data (filename);
3000 if (mkdir (filename_c, 0700) < 0)
3003 "Failed to create directory %s: %s\n",
3004 filename_c, _dbus_strerror (errno));
3028 if (_dbus_string_get_length (dir) == 0 ||
3029 _dbus_string_get_length (next_component) == 0)
3032 dir_ends_in_slash =
'/' == _dbus_string_get_byte (dir,
3033 _dbus_string_get_length (dir) - 1);
3035 file_starts_with_slash =
'/' == _dbus_string_get_byte (next_component, 0);
3037 if (dir_ends_in_slash && file_starts_with_slash)
3041 else if (!(dir_ends_in_slash || file_starts_with_slash))
3048 _dbus_string_get_length (dir));
3052 #define NANOSECONDS_PER_SECOND 1000000000 3054 #define MICROSECONDS_PER_SECOND 1000000 3056 #define MILLISECONDS_PER_SECOND 1000 3058 #define NANOSECONDS_PER_MILLISECOND 1000000 3060 #define MICROSECONDS_PER_MILLISECOND 1000 3069 #ifdef HAVE_NANOSLEEP 3070 struct timespec req;
3071 struct timespec rem;
3073 req.tv_sec = milliseconds / MILLISECONDS_PER_SECOND;
3074 req.tv_nsec = (milliseconds % MILLISECONDS_PER_SECOND) * NANOSECONDS_PER_MILLISECOND;
3078 while (nanosleep (&req, &rem) < 0 && errno == EINTR)
3080 #elif defined (HAVE_USLEEP) 3081 usleep (milliseconds * MICROSECONDS_PER_MILLISECOND);
3083 sleep (MAX (milliseconds / 1000, 1));
3105 old_len = _dbus_string_get_length (str);
3109 fd = open (
"/dev/urandom", O_RDONLY);
3114 "Could not open /dev/urandom: %s",
3115 _dbus_strerror (errno));
3119 _dbus_verbose (
"/dev/urandom fd %d opened\n", fd);
3123 if (result != n_bytes)
3127 "Could not read /dev/urandom: %s",
3128 _dbus_strerror (errno));
3131 "Short read from /dev/urandom");
3138 _dbus_verbose (
"Read %d bytes from /dev/urandom\n",
3166 _dbus_strerror (
int error_number)
3170 msg = strerror (error_number);
3183 signal (SIGPIPE, SIG_IGN);
3198 val = fcntl (fd, F_GETFD, 0);
3205 fcntl (fd, F_SETFD, val);
3219 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3228 "Could not close fd %d", fd);
3249 #ifdef F_DUPFD_CLOEXEC 3252 new_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
3253 cloexec_done = new_fd >= 0;
3255 if (new_fd < 0 && errno == EINVAL)
3258 new_fd = fcntl(fd, F_DUPFD, 3);
3264 "Could not duplicate fd %d", fd);
3268 #ifdef F_DUPFD_CLOEXEC 3289 return _dbus_set_fd_nonblocking (fd.fd, error);
3293 _dbus_set_fd_nonblocking (
int fd,
3298 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3300 val = fcntl (fd, F_GETFL, 0);
3304 "Failed to get flags from file descriptor %d: %s",
3305 fd, _dbus_strerror (errno));
3306 _dbus_verbose (
"Failed to get flags for fd %d: %s\n", fd,
3307 _dbus_strerror (errno));
3311 if (fcntl (fd, F_SETFL, val | O_NONBLOCK) < 0)
3314 "Failed to set nonblocking flag of file descriptor %d: %s",
3315 fd, _dbus_strerror (errno));
3316 _dbus_verbose (
"Failed to set fd %d nonblocking: %s\n",
3317 fd, _dbus_strerror (errno));
3333 #if defined (HAVE_BACKTRACE) && defined (DBUS_BUILT_R_DYNAMIC) 3339 bt_size = backtrace (bt, 500);
3341 syms = backtrace_symbols (bt, bt_size);
3347 fprintf (stderr,
" %s\n", syms[i]);
3353 #elif defined (HAVE_BACKTRACE) && ! defined (DBUS_BUILT_R_DYNAMIC) 3354 fprintf (stderr,
" D-Bus not built with -rdynamic so unable to print a backtrace\n");
3356 fprintf (stderr,
" D-Bus not compiled with backtrace support so unable to print a backtrace\n");
3378 #ifdef HAVE_SOCKETPAIR 3385 retval = socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fds);
3386 cloexec_done = retval >= 0;
3388 if (retval < 0 && (errno == EINVAL || errno == EPROTOTYPE))
3391 retval = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
3397 "Could not create full-duplex pipe");
3401 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3412 (!_dbus_set_fd_nonblocking (fds[0],
NULL) ||
3413 !_dbus_set_fd_nonblocking (fds[1],
NULL)))
3416 "Could not set full-duplex pipe nonblocking");
3427 _dbus_verbose (
"full-duplex pipe %d <-> %d\n",
3432 _dbus_warn (
"_dbus_socketpair() not implemented on this OS");
3434 "_dbus_socketpair() not implemented on this OS");
3451 char static_buf[1024];
3452 int bufsize =
sizeof (static_buf);
3456 DBUS_VA_COPY (args_copy, args);
3457 len = vsnprintf (static_buf, bufsize, format, args_copy);
3474 DBUS_VA_COPY (args_copy, args);
3476 if (vsnprintf (static_buf, 1, format, args_copy) == 1)
3495 DBUS_VA_COPY (args_copy, args);
3496 len = vsnprintf (buf, bufsize, format, args_copy);
3521 static const char* tmpdir =
NULL;
3533 tmpdir = getenv(
"TMPDIR");
3539 tmpdir = getenv(
"TMP");
3541 tmpdir = getenv(
"TEMP");
3576 _read_subprocess_line_argv (
const char *progpath,
3578 const char *
const *argv,
3582 int result_pipe[2] = { -1, -1 };
3583 int errors_pipe[2] = { -1, -1 };
3590 sigset_t new_set, old_set;
3592 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3599 sigemptyset (&new_set);
3600 sigaddset (&new_set, SIGCHLD);
3601 sigprocmask (SIG_BLOCK, &new_set, &old_set);
3603 orig_len = _dbus_string_get_length (result);
3607 if (pipe (result_pipe) < 0)
3610 "Failed to create a pipe to call %s: %s",
3611 progpath, _dbus_strerror (errno));
3612 _dbus_verbose (
"Failed to create a pipe to call %s: %s\n",
3613 progpath, _dbus_strerror (errno));
3616 if (pipe (errors_pipe) < 0)
3619 "Failed to create a pipe to call %s: %s",
3620 progpath, _dbus_strerror (errno));
3621 _dbus_verbose (
"Failed to create a pipe to call %s: %s\n",
3622 progpath, _dbus_strerror (errno));
3630 "Failed to fork() to call %s: %s",
3631 progpath, _dbus_strerror (errno));
3632 _dbus_verbose (
"Failed to fork() to call %s: %s\n",
3633 progpath, _dbus_strerror (errno));
3640 const char *error_str;
3644 int saved_errno = errno;
3649 if (write (errors_pipe[
WRITE_END], error_str, strlen (error_str)) < 0 ||
3650 write (errors_pipe[
WRITE_END],
": ", 2) < 0)
3655 error_str = _dbus_strerror (saved_errno);
3657 if (write (errors_pipe[
WRITE_END], error_str, strlen (error_str)) < 0)
3669 if (dup2 (result_pipe[
WRITE_END], 1) == -1)
3671 if (dup2 (errors_pipe[
WRITE_END], 2) == -1)
3676 sigprocmask (SIG_SETMASK, &old_set,
NULL);
3679 if (progpath[0] ==
'/')
3681 execv (progpath, (
char *
const *) argv);
3690 execvp (strrchr (progpath,
'/')+1, (
char *
const *) argv);
3693 execvp (progpath, (
char *
const *) argv);
3715 ret = waitpid (pid, &status, 0);
3717 while (ret == -1 && errno == EINTR);
3721 if (!WIFEXITED (status) || WEXITSTATUS (status) != 0 )
3727 _DBUS_SET_OOM (error);
3739 if (_dbus_string_get_length (&error_message) > 0)
3741 "%s terminated abnormally with the following error: %s",
3742 progpath, _dbus_string_get_data (&error_message));
3745 "%s terminated abnormally without any error message",
3753 sigprocmask (SIG_SETMASK, &old_set,
NULL);
3756 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3758 _DBUS_ASSERT_ERROR_IS_SET (error);
3760 if (result_pipe[0] != -1)
3761 close (result_pipe[0]);
3762 if (result_pipe[1] != -1)
3763 close (result_pipe[1]);
3764 if (errors_pipe[0] != -1)
3765 close (errors_pipe[0]);
3766 if (errors_pipe[1] != -1)
3767 close (errors_pipe[1]);
3791 static const char arg_dbus_launch[] =
"dbus-launch";
3792 static const char arg_autolaunch[] =
"--autolaunch";
3793 static const char arg_binary_syntax[] =
"--binary-syntax";
3794 static const char arg_close_stderr[] =
"--close-stderr";
3799 const char *display;
3800 const char *progpath;
3801 const char *argv[6];
3809 "Unable to autolaunch when setuid");
3813 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3826 if (display ==
NULL || display[0] ==
'\0')
3829 "Unable to autolaunch a dbus-daemon without a $DISPLAY for X11");
3835 _DBUS_SET_OOM (error);
3844 #ifdef DBUS_ENABLE_EMBEDDED_TESTS 3847 if (progpath ==
NULL)
3849 progpath = DBUS_BINDIR
"/dbus-launch";
3856 argv[i] = arg_dbus_launch;
3858 argv[i] = arg_autolaunch;
3860 argv[i] = _dbus_string_get_data (&uuid);
3862 argv[i] = arg_binary_syntax;
3864 argv[i] = arg_close_stderr;
3871 retval = _read_subprocess_line_argv (progpath,
3873 argv, address, error);
3880 "Using X11 for dbus-daemon autolaunch was disabled at compile time, " 3881 "set your DBUS_SESSION_BUS_ADDRESS instead");
3926 if (create_if_not_found)
3938 if (!create_if_not_found)
3941 "D-Bus library appears to be incorrectly set up: " 3942 "see the manual page for dbus-uuidgen to correct " 3943 "this issue. (%s; %s)",
3971 const char *launchd_env_var,
3974 #ifdef DBUS_ENABLE_LAUNCHD 3978 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3983 "Unable to find launchd socket when setuid");
3988 argv[i] =
"launchctl";
3992 argv[i] = (
char*)launchd_env_var;
3999 if (!_read_subprocess_line_argv(argv[0],
TRUE, argv, socket_path, error))
4005 if (_dbus_string_get_length(socket_path) == 0)
4015 "can't lookup socket from launchd; launchd support not compiled in");
4020 #ifdef DBUS_ENABLE_LAUNCHD 4030 "Unable to find launchd socket when setuid");
4036 _DBUS_SET_OOM (error);
4051 "launchd did not provide a socket path, " 4052 "verify that org.freedesktop.dbus-session.plist is loaded!");
4058 _DBUS_SET_OOM (error);
4063 _dbus_string_get_length (address)))
4065 _DBUS_SET_OOM (error);
4080 const char *runtime_dir =
_dbus_getenv (
"XDG_RUNTIME_DIR");
4085 if (runtime_dir ==
NULL)
4087 _dbus_verbose (
"XDG_RUNTIME_DIR not found in environment");
4094 _DBUS_SET_OOM (error);
4100 _DBUS_SET_OOM (error);
4104 if (lstat (_dbus_string_get_const_data (&user_bus_path), &stbuf) == -1)
4106 _dbus_verbose (
"XDG_RUNTIME_DIR/bus not available: %s",
4107 _dbus_strerror (errno));
4113 if (stbuf.st_uid != getuid ())
4115 _dbus_verbose (
"XDG_RUNTIME_DIR/bus owned by uid %ld, not our uid %ld",
4116 (
long) stbuf.st_uid, (
long) getuid ());
4122 if ((stbuf.st_mode & S_IFMT) != S_IFSOCK)
4124 _dbus_verbose (
"XDG_RUNTIME_DIR/bus is not a socket: st_mode = 0o%lo",
4125 (
long) stbuf.st_mode);
4134 _DBUS_SET_OOM (error);
4170 #ifdef DBUS_ENABLE_LAUNCHD 4172 return _dbus_lookup_session_address_launchd (address, error);
4176 if (!_dbus_lookup_user_bus (supported, address, error))
4178 else if (*supported)
4236 #ifdef DBUS_ENABLE_EMBEDDED_TESTS 4238 const char *
override;
4241 if (
override !=
NULL && *
override !=
'\0')
4247 _dbus_verbose (
"Using fake homedir for testing: %s\n",
4248 _dbus_string_get_const_data (&homedir));
4255 if (!already_warned)
4257 _dbus_warn (
"Using %s for testing, set DBUS_TEST_HOMEDIR to avoid",
4258 _dbus_string_get_const_data (&homedir));
4259 already_warned =
TRUE;
4271 directory, _dbus_string_get_length (directory))) {
4285 _dbus_daemon_publish_session_bus_address (
const char* addr,
4293 _dbus_daemon_unpublish_session_bus_address (
void)
4307 return e == EAGAIN || e == EWOULDBLOCK;
4321 const char *filename_c;
4323 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4325 filename_c = _dbus_string_get_const_data (filename);
4327 if (rmdir (filename_c) != 0)
4330 "Failed to remove directory %s: %s\n",
4331 filename_c, _dbus_strerror (errno));
4351 struct sockaddr_storage storage;
4352 struct sockaddr_un un;
4355 socklen_t sa_len =
sizeof(sa_buf);
4359 if (getsockname(fd.fd, &sa_buf.sa, &sa_len) < 0)
4362 return sa_buf.sa.sa_family == AF_UNIX;
4385 d = opendir (
"/proc/self/fd");
4399 if (de->d_name[0] ==
'.')
4403 l = strtol (de->d_name, &e, 10);
4404 if (errno != 0 || e ==
NULL || *e !=
'\0')
4411 if (fd == dirfd (d))
4422 maxfds = sysconf (_SC_OPEN_MAX);
4431 for (i = 3; i < maxfds; i++)
4450 #if 0 && defined(HAVE_LIBC_ENABLE_SECURE) 4453 extern int __libc_enable_secure;
4454 return __libc_enable_secure;
4456 #elif defined(HAVE_ISSETUGID) 4458 return issetugid ();
4460 uid_t ruid, euid, suid;
4461 gid_t rgid, egid, sgid;
4468 if (_DBUS_UNLIKELY (!check_setuid_initialised))
4470 #ifdef HAVE_GETRESUID 4471 if (getresuid (&ruid, &euid, &suid) != 0 ||
4472 getresgid (&rgid, &egid, &sgid) != 0)
4475 suid = ruid = getuid ();
4476 sgid = rgid = getgid ();
4481 check_setuid_initialised =
TRUE;
4482 is_setuid = (ruid != euid || ruid != suid ||
4483 rgid != egid || rgid != sgid);
4504 struct sockaddr_storage storage;
4505 struct sockaddr_un un;
4506 struct sockaddr_in ipv4;
4507 struct sockaddr_in6 ipv6;
4509 char hostip[INET6_ADDRSTRLEN];
4510 socklen_t size =
sizeof (socket);
4513 if (getsockname (fd.fd, &socket.sa, &size))
4516 switch (socket.sa.sa_family)
4519 if (socket.un.sun_path[0]==
'\0')
4535 if (inet_ntop (AF_INET, &socket.ipv4.sin_addr, hostip, sizeof (hostip)))
4537 hostip, ntohs (socket.ipv4.sin_port)))
4543 if (inet_ntop (AF_INET6, &socket.ipv6.sin6_addr, hostip, sizeof (hostip)))
4545 ntohs (socket.ipv6.sin6_port)) &&
4553 "Failed to read address from socket: Unknown socket type.");
4559 "Failed to open socket: %s",
4560 _dbus_strerror (errno));
4565 _dbus_save_socket_errno (
void)
4571 _dbus_restore_socket_errno (
int saved_errno)
4573 errno = saved_errno;
4576 static const char *syslog_tag =
"dbus";
4577 #ifdef HAVE_SYSLOG_H 4578 static DBusLogFlags log_flags = DBUS_LOG_FLAGS_STDERR;
4601 (flags & (DBUS_LOG_FLAGS_STDERR | DBUS_LOG_FLAGS_SYSTEM_LOG)) != 0);
4605 #ifdef HAVE_SYSLOG_H 4608 if (log_flags & DBUS_LOG_FLAGS_SYSTEM_LOG)
4609 openlog (tag, LOG_PID, LOG_DAEMON);
4626 #ifdef HAVE_SYSLOG_H 4627 if (log_flags & DBUS_LOG_FLAGS_SYSTEM_LOG)
4632 case DBUS_SYSTEM_LOG_INFO:
4633 flags = LOG_DAEMON | LOG_INFO;
4635 case DBUS_SYSTEM_LOG_WARNING:
4636 flags = LOG_DAEMON | LOG_WARNING;
4638 case DBUS_SYSTEM_LOG_SECURITY:
4639 flags = LOG_AUTH | LOG_NOTICE;
4641 case DBUS_SYSTEM_LOG_ERROR:
4642 flags = LOG_DAEMON|LOG_CRIT;
4648 DBUS_VA_COPY (tmp, args);
4649 vsyslog (flags, msg, tmp);
4655 if (log_flags & DBUS_LOG_FLAGS_STDERR)
4658 DBUS_VA_COPY (tmp, args);
4660 vfprintf (stderr, msg, tmp);
4661 fputc (
'\n', stderr);
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.
const char * message
public error message field
#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.
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.
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.
#define DBUS_ERROR_INIT
Expands to a suitable initializer for a DBusError on the stack.
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.
#define DBUS_MAXIMUM_MESSAGE_UNIX_FDS
The maximum total number of unix fds in a message.
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.
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.
void _dbus_print_backtrace(void)
On GNU libc systems, print a crude backtrace to stderr.
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().
int _dbus_read_socket_with_unix_fds(DBusSocket fd, DBusString *buffer, int count, int *fds, unsigned int *n_fds)
Like _dbus_read_socket() but also tries to read unix fds from the socket.
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.
const char * name
public error name field
#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.
void _dbus_init_system_log(const char *tag, DBusLogFlags flags)
Initialize the system log.
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.
void _dbus_logv(DBusSystemLogSeverity severity, const char *msg, va_list args)
Log a message to the system log file (e.g.
#define FALSE
Expands to "0".
dbus_bool_t _dbus_write_uuid_file(const DBusString *filename, const DBusGUID *uuid, DBusError *error)
Write the give UUID to a file.
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...
int dbus_int32_t
A 32-bit signed integer on all platforms.
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.