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 for (cm = CMSG_FIRSTHDR(&m); cm; cm = CMSG_NXTHDR(&m, cm))
439 if (cm->cmsg_level == SOL_SOCKET && cm->cmsg_type == SCM_RIGHTS)
442 int *payload = (
int *) CMSG_DATA (cm);
443 size_t payload_len_bytes = (cm->cmsg_len - CMSG_LEN (0));
444 size_t payload_len_fds = payload_len_bytes /
sizeof (int);
449 _DBUS_STATIC_ASSERT (
sizeof (
size_t) >=
sizeof (
unsigned int));
451 if (_DBUS_LIKELY (payload_len_fds <= (
size_t) *n_fds))
454 fds_to_use = payload_len_fds;
462 fds_to_use = (size_t) *n_fds;
467 for (i = fds_to_use; i < payload_len_fds; i++)
473 memcpy (fds, payload, fds_to_use *
sizeof (
int));
478 *n_fds = (
unsigned int) fds_to_use;
483 for (i = 0; i < fds_to_use; i++)
492 if (m.msg_flags & MSG_CTRUNC)
503 for (i = 0; i < *n_fds; i++)
526 _dbus_write_socket_with_unix_fds(
DBusSocket fd,
533 #ifndef HAVE_UNIX_FD_PASSING 542 return _dbus_write_socket_with_unix_fds_two(fd, buffer, start, len,
NULL, 0, 0, fds, n_fds);
547 _dbus_write_socket_with_unix_fds_two(
DBusSocket fd,
557 #ifndef HAVE_UNIX_FD_PASSING 565 buffer1, start1, len1,
566 buffer2, start2, len2);
579 iov[0].iov_base = (
char*) _dbus_string_get_const_data_len (buffer1, start1, len1);
580 iov[0].iov_len = len1;
584 iov[1].iov_base = (
char*) _dbus_string_get_const_data_len (buffer2, start2, len2);
585 iov[1].iov_len = len2;
590 m.msg_iovlen = buffer2 ? 2 : 1;
594 m.msg_controllen = CMSG_SPACE(n_fds *
sizeof(
int));
595 m.msg_control = alloca(m.msg_controllen);
596 memset(m.msg_control, 0, m.msg_controllen);
598 cm = CMSG_FIRSTHDR(&m);
599 cm->cmsg_level = SOL_SOCKET;
600 cm->cmsg_type = SCM_RIGHTS;
601 cm->cmsg_len = CMSG_LEN(n_fds *
sizeof(
int));
602 memcpy(CMSG_DATA(cm), fds, n_fds *
sizeof(
int));
607 bytes_written = sendmsg (fd.fd, &m, 0
608 #
if HAVE_DECL_MSG_NOSIGNAL
613 if (bytes_written < 0 && errno == EINTR)
617 if (bytes_written > 0)
621 return bytes_written;
647 #if HAVE_DECL_MSG_NOSIGNAL 648 struct iovec vectors[2];
660 data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
663 data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
671 vectors[0].iov_base = (
char*) data1;
672 vectors[0].iov_len = len1;
673 vectors[1].iov_base = (
char*) data2;
674 vectors[1].iov_len = len2;
678 m.msg_iovlen = data2 ? 2 : 1;
682 bytes_written = sendmsg (fd.fd, &m, MSG_NOSIGNAL);
684 if (bytes_written < 0 && errno == EINTR)
687 return bytes_written;
691 buffer2, start2, len2);
722 start = _dbus_string_get_length (buffer);
734 bytes_read = read (fd, data, count);
780 data = _dbus_string_get_const_data_len (buffer, start, len);
784 bytes_written = write (fd, data, len);
786 if (bytes_written < 0 && errno == EINTR)
790 if (bytes_written > 0)
794 return bytes_written;
834 struct iovec vectors[2];
839 data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
842 data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
850 vectors[0].iov_base = (
char*) data1;
851 vectors[0].iov_len = len1;
852 vectors[1].iov_base = (
char*) data2;
853 vectors[1].iov_len = len2;
857 bytes_written = writev (fd,
861 if (bytes_written < 0 && errno == EINTR)
864 return bytes_written;
871 if (ret1 == len1 && buffer2 !=
NULL)
885 #define _DBUS_MAX_SUN_PATH_LENGTH 99 923 struct sockaddr_un addr;
925 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
927 _dbus_verbose (
"connecting to unix socket %s abstract=%d\n",
931 if (!_dbus_open_unix_socket (&fd, error))
933 _DBUS_ASSERT_ERROR_IS_SET(error);
936 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
939 addr.sun_family = AF_UNIX;
940 path_len = strlen (path);
945 addr.sun_path[0] =
'\0';
948 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
951 "Abstract socket name too long\n");
956 strncpy (&addr.sun_path[1], path, path_len);
960 "Operating system does not support abstract socket namespace\n");
967 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
970 "Socket name too long\n");
975 strncpy (addr.sun_path, path, path_len);
978 if (connect (fd, (
struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (
struct sockaddr_un, sun_path) + path_len) < 0)
982 "Failed to connect to socket %s: %s",
983 path, _dbus_strerror (errno));
989 if (!_dbus_set_fd_nonblocking (fd, error))
991 _DBUS_ASSERT_ERROR_IS_SET (error);
1022 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1024 _dbus_verbose (
"connecting to process %s\n", path);
1027 retval = socketpair (AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fds);
1028 cloexec_done = (retval >= 0);
1030 if (retval < 0 && (errno == EINVAL || errno == EPROTOTYPE))
1033 retval = socketpair (AF_UNIX, SOCK_STREAM, 0, fds);
1040 "Failed to create socket pair: %s",
1041 _dbus_strerror (errno));
1056 "Failed to fork() to call %s: %s",
1057 path, _dbus_strerror (errno));
1068 dup2 (fds[1], STDIN_FILENO);
1069 dup2 (fds[1], STDOUT_FILENO);
1071 if (fds[1] != STDIN_FILENO &&
1072 fds[1] != STDOUT_FILENO)
1080 execvp (path, (
char *
const *) argv);
1082 fprintf (stderr,
"Failed to execute process %s: %s\n", path, _dbus_strerror (errno));
1090 if (!_dbus_set_fd_nonblocking (fds[0], error))
1092 _DBUS_ASSERT_ERROR_IS_SET (error);
1124 struct sockaddr_un addr;
1127 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1129 _dbus_verbose (
"listening on unix socket %s abstract=%d\n",
1132 if (!_dbus_open_unix_socket (&listen_fd, error))
1134 _DBUS_ASSERT_ERROR_IS_SET(error);
1137 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1140 addr.sun_family = AF_UNIX;
1141 path_len = strlen (path);
1149 addr.sun_path[0] =
'\0';
1152 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
1155 "Abstract socket name too long\n");
1160 strncpy (&addr.sun_path[1], path, path_len);
1164 "Operating system does not support abstract socket namespace\n");
1184 if (stat (path, &sb) == 0 &&
1185 S_ISSOCK (sb.st_mode))
1189 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
1192 "Socket name too long\n");
1197 strncpy (addr.sun_path, path, path_len);
1200 if (bind (listen_fd, (
struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (
struct sockaddr_un, sun_path) + path_len) < 0)
1203 "Failed to bind socket \"%s\": %s",
1204 path, _dbus_strerror (errno));
1209 if (listen (listen_fd, SOMAXCONN ) < 0)
1212 "Failed to listen on socket \"%s\": %s",
1213 path, _dbus_strerror (errno));
1218 if (!_dbus_set_fd_nonblocking (listen_fd, error))
1220 _DBUS_ASSERT_ERROR_IS_SET (error);
1228 if (!
abstract && chmod (path, 0777) < 0)
1229 _dbus_warn (
"Could not set mode 0777 on socket %s", path);
1253 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1255 n = sd_listen_fds (
TRUE);
1259 "Failed to acquire systemd socket: %s",
1260 _dbus_strerror (-n));
1267 "No socket received.");
1271 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1273 r = sd_is_socket (fd, AF_UNSPEC, SOCK_STREAM, 1);
1277 "Failed to verify systemd socket type: %s",
1278 _dbus_strerror (-r));
1285 "Passed socket has wrong type.");
1297 "Failed to allocate file handle array.");
1301 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1303 if (!_dbus_set_fd_nonblocking (fd, error))
1305 _DBUS_ASSERT_ERROR_IS_SET (error);
1309 new_fds[fd - SD_LISTEN_FDS_START].fd = fd;
1317 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1326 "dbus was compiled without systemd support");
1350 return _dbus_connect_tcp_socket_with_nonce (host, port, family, (
const char*)
NULL, error);
1354 _dbus_connect_tcp_socket_with_nonce (
const char *host,
1357 const char *noncefile,
1360 int saved_errno = 0;
1363 struct addrinfo hints;
1364 struct addrinfo *ai, *tmp;
1366 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1371 hints.ai_family = AF_UNSPEC;
1372 else if (!strcmp(family,
"ipv4"))
1373 hints.ai_family = AF_INET;
1374 else if (!strcmp(family,
"ipv6"))
1375 hints.ai_family = AF_INET6;
1380 "Unknown address family %s", family);
1381 return _dbus_socket_get_invalid ();
1383 hints.ai_protocol = IPPROTO_TCP;
1384 hints.ai_socktype = SOCK_STREAM;
1385 hints.ai_flags = AI_ADDRCONFIG;
1387 if ((res = getaddrinfo(host, port, &hints, &ai)) != 0)
1391 "Failed to lookup host/port: \"%s:%s\": %s (%d)",
1392 host, port, gai_strerror(res), res);
1393 return _dbus_socket_get_invalid ();
1399 if (!_dbus_open_socket (&fd.fd, tmp->ai_family, SOCK_STREAM, 0, error))
1402 _DBUS_ASSERT_ERROR_IS_SET(error);
1403 return _dbus_socket_get_invalid ();
1405 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1407 if (connect (fd.fd, (
struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
1409 saved_errno = errno;
1424 "Failed to connect to socket \"%s:%s\" %s",
1425 host, port, _dbus_strerror(saved_errno));
1426 return _dbus_socket_get_invalid ();
1429 if (noncefile !=
NULL)
1434 ret = _dbus_send_nonce (fd, &noncefileStr, error);
1440 return _dbus_socket_get_invalid ();
1444 if (!_dbus_set_fd_nonblocking (fd.fd, error))
1447 return _dbus_socket_get_invalid ();
1478 int nlisten_fd = 0, res, i;
1480 struct addrinfo hints;
1481 struct addrinfo *ai, *tmp;
1482 unsigned int reuseaddr;
1485 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1490 hints.ai_family = AF_UNSPEC;
1491 else if (!strcmp(family,
"ipv4"))
1492 hints.ai_family = AF_INET;
1493 else if (!strcmp(family,
"ipv6"))
1494 hints.ai_family = AF_INET6;
1499 "Unknown address family %s", family);
1503 hints.ai_protocol = IPPROTO_TCP;
1504 hints.ai_socktype = SOCK_STREAM;
1505 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
1507 redo_lookup_with_port:
1509 if ((res = getaddrinfo(host, port, &hints, &ai)) != 0 || !ai)
1513 "Failed to lookup host/port: \"%s:%s\": %s (%d)",
1514 host ? host :
"*", port, gai_strerror(res), res);
1521 int fd = -1, tcp_nodelay_on;
1524 if (!_dbus_open_socket (&fd, tmp->ai_family, SOCK_STREAM, 0, error))
1526 _DBUS_ASSERT_ERROR_IS_SET(error);
1529 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1532 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
sizeof(reuseaddr))==-1)
1534 _dbus_warn (
"Failed to set socket option \"%s:%s\": %s",
1535 host ? host :
"*", port, _dbus_strerror (errno));
1541 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &tcp_nodelay_on,
sizeof (tcp_nodelay_on)) == -1)
1543 _dbus_warn (
"Failed to set TCP_NODELAY socket option \"%s:%s\": %s",
1544 host ? host :
"*", port, _dbus_strerror (errno));
1547 if (bind (fd, (
struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
1549 saved_errno = errno;
1551 if (saved_errno == EADDRINUSE)
1569 "Failed to bind socket \"%s:%s\": %s",
1570 host ? host :
"*", port, _dbus_strerror (saved_errno));
1574 if (listen (fd, 30 ) < 0)
1576 saved_errno = errno;
1579 "Failed to listen on socket \"%s:%s\": %s",
1580 host ? host :
"*", port, _dbus_strerror (saved_errno));
1587 saved_errno = errno;
1590 "Failed to allocate file handle array: %s",
1591 _dbus_strerror (saved_errno));
1594 listen_fd = newlisten_fd;
1595 listen_fd[nlisten_fd].fd = fd;
1598 if (!_dbus_string_get_length(retport))
1604 if (!port || !strcmp(port,
"0"))
1607 struct sockaddr_storage addr;
1611 addrlen =
sizeof(addr);
1612 result = getsockname(fd, (
struct sockaddr*) &addr, &addrlen);
1615 (res = getnameinfo ((
struct sockaddr*)&addr, addrlen,
NULL, 0,
1616 portbuf,
sizeof(portbuf),
1617 NI_NUMERICHOST | NI_NUMERICSERV)) != 0)
1620 "Failed to resolve port \"%s:%s\": %s (%d)",
1621 host ? host :
"*", port, gai_strerror(res), res);
1631 port = _dbus_string_get_const_data(retport);
1633 goto redo_lookup_with_port;
1654 "Failed to bind socket \"%s:%s\": %s",
1655 host ? host :
"*", port, _dbus_strerror (errno));
1659 for (i = 0 ; i < nlisten_fd ; i++)
1661 if (!_dbus_set_fd_nonblocking (listen_fd[i].fd, error))
1674 for (i = 0 ; i < nlisten_fd ; i++)
1681 write_credentials_byte (
int server_fd,
1685 char buf[1] = {
'\0' };
1686 #if defined(HAVE_CMSGCRED) 1689 char cred[CMSG_SPACE (
sizeof (
struct cmsgcred))];
1700 msg.msg_control = (caddr_t) &cmsg;
1701 msg.msg_controllen = CMSG_SPACE (
sizeof (
struct cmsgcred));
1703 cmsg.hdr.cmsg_len = CMSG_LEN (
sizeof (
struct cmsgcred));
1704 cmsg.hdr.cmsg_level = SOL_SOCKET;
1705 cmsg.hdr.cmsg_type = SCM_CREDS;
1708 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1712 #if defined(HAVE_CMSGCRED) 1713 bytes_written = sendmsg (server_fd, &msg, 0
1714 #
if HAVE_DECL_MSG_NOSIGNAL
1722 if (bytes_written < 0 && errno == EINVAL)
1725 bytes_written = send (server_fd, buf, 1, 0
1726 #
if HAVE_DECL_MSG_NOSIGNAL
1732 if (bytes_written < 0 && errno == EINTR)
1735 if (bytes_written < 0)
1738 "Failed to write credentials byte: %s",
1739 _dbus_strerror (errno));
1742 else if (bytes_written == 0)
1745 "wrote zero bytes writing credentials byte");
1751 _dbus_verbose (
"wrote credentials byte\n");
1758 add_linux_security_label_to_credentials (
int client_fd,
1761 #if defined(__linux__) && defined(SO_PEERSEC) 1763 socklen_t len = 1024;
1770 while (getsockopt (client_fd, SOL_SOCKET, SO_PEERSEC,
1771 _dbus_string_get_data (&buf), &len) < 0)
1775 _dbus_verbose (
"getsockopt failed with %s, len now %lu\n",
1776 _dbus_strerror (e), (
unsigned long) len);
1778 if (e != ERANGE || len <= _dbus_string_get_length_uint (&buf))
1780 _dbus_verbose (
"Failed to getsockopt(SO_PEERSEC): %s\n",
1781 _dbus_strerror (e));
1793 _dbus_verbose (
"will try again with %lu\n", (
unsigned long) len);
1798 _dbus_verbose (
"getsockopt(SO_PEERSEC) yielded <= 0 bytes: %lu\n",
1799 (
unsigned long) len);
1803 if (len > _dbus_string_get_length_uint (&buf))
1805 _dbus_verbose (
"%lu > %u", (
unsigned long) len,
1806 _dbus_string_get_length_uint (&buf));
1810 if (_dbus_string_get_byte (&buf, len - 1) == 0)
1814 _dbus_verbose (
"subtracting trailing \\0\n");
1825 if (strlen (_dbus_string_get_const_data (&buf)) != len)
1830 _dbus_verbose (
"security label from kernel had an embedded \\0, " 1835 _dbus_verbose (
"getsockopt(SO_PEERSEC): %lu bytes excluding \\0: %s\n",
1836 (
unsigned long) len,
1837 _dbus_string_get_const_data (&buf));
1840 _dbus_string_get_const_data (&buf)))
1907 #ifdef HAVE_CMSGCRED 1910 char cred[CMSG_SPACE (
sizeof (
struct cmsgcred))];
1918 _DBUS_STATIC_ASSERT (
sizeof (pid_t) <=
sizeof (
dbus_pid_t));
1919 _DBUS_STATIC_ASSERT (
sizeof (uid_t) <=
sizeof (
dbus_uid_t));
1920 _DBUS_STATIC_ASSERT (
sizeof (gid_t) <=
sizeof (
dbus_gid_t));
1925 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1929 iov.iov_base = &buf;
1936 #if defined(HAVE_CMSGCRED) 1938 msg.msg_control = (caddr_t) &cmsg;
1939 msg.msg_controllen = CMSG_SPACE (
sizeof (
struct cmsgcred));
1943 bytes_read = recvmsg (client_fd.fd, &msg, 0);
1956 "Failed to read credentials byte: %s",
1957 _dbus_strerror (errno));
1960 else if (bytes_read == 0)
1966 "Failed to read credentials byte (zero-length read)");
1969 else if (buf !=
'\0')
1972 "Credentials byte was not nul");
1976 _dbus_verbose (
"read credentials byte\n");
1989 struct sockpeercred cr;
1993 socklen_t cr_len =
sizeof (cr);
1995 if (getsockopt (client_fd.fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len) != 0)
1997 _dbus_verbose (
"Failed to getsockopt(SO_PEERCRED): %s\n",
1998 _dbus_strerror (errno));
2000 else if (cr_len !=
sizeof (cr))
2002 _dbus_verbose (
"Failed to getsockopt(SO_PEERCRED), returned %d bytes, expected %d\n",
2003 cr_len, (
int)
sizeof (cr));
2010 #elif defined(HAVE_UNPCBID) && defined(LOCAL_PEEREID) 2014 socklen_t cr_len =
sizeof (cr);
2016 if (getsockopt (client_fd.fd, 0, LOCAL_PEEREID, &cr, &cr_len) != 0)
2018 _dbus_verbose (
"Failed to getsockopt(LOCAL_PEEREID): %s\n",
2019 _dbus_strerror (errno));
2021 else if (cr_len !=
sizeof (cr))
2023 _dbus_verbose (
"Failed to getsockopt(LOCAL_PEEREID), returned %d bytes, expected %d\n",
2024 cr_len, (
int)
sizeof (cr));
2028 pid_read = cr.unp_pid;
2029 uid_read = cr.unp_euid;
2031 #elif defined(HAVE_CMSGCRED) 2040 struct cmsgcred *cred;
2041 struct cmsghdr *cmsgp;
2043 for (cmsgp = CMSG_FIRSTHDR (&msg);
2045 cmsgp = CMSG_NXTHDR (&msg, cmsgp))
2047 if (cmsgp->cmsg_type == SCM_CREDS &&
2048 cmsgp->cmsg_level == SOL_SOCKET &&
2049 cmsgp->cmsg_len >= CMSG_LEN (
sizeof (
struct cmsgcred)))
2051 cred = (
struct cmsgcred *) CMSG_DATA (cmsgp);
2052 pid_read = cred->cmcred_pid;
2053 uid_read = cred->cmcred_euid;
2058 #elif defined(HAVE_GETPEERUCRED) 2062 ucred_t * ucred =
NULL;
2063 if (getpeerucred (client_fd.fd, &ucred) == 0)
2066 adt_session_data_t *adth =
NULL;
2068 pid_read = ucred_getpid (ucred);
2069 uid_read = ucred_geteuid (ucred);
2072 if (adt_start_session (&adth,
NULL, 0) || (adth ==
NULL))
2074 _dbus_verbose (
"Failed to adt_start_session(): %s\n", _dbus_strerror (errno));
2078 if (adt_set_from_ucred (adth, ucred, ADT_NEW))
2080 _dbus_verbose (
"Failed to adt_set_from_ucred(): %s\n", _dbus_strerror (errno));
2084 adt_export_data_t *data =
NULL;
2085 size_t size = adt_export_session_data (adth, &data);
2088 _dbus_verbose (
"Failed to adt_export_session_data(): %s\n", _dbus_strerror (errno));
2096 (void) adt_end_session (adth);
2102 _dbus_verbose (
"Failed to getpeerucred() credentials: %s\n", _dbus_strerror (errno));
2112 #elif defined(HAVE_GETPEEREID) 2130 if (getpeereid (client_fd.fd, &euid, &egid) == 0)
2136 _dbus_verbose (
"Failed to getpeereid() credentials: %s\n", _dbus_strerror (errno));
2140 #warning Socket credentials not supported on this Unix OS 2141 #warning Please tell https://bugs.freedesktop.org/enter_bug.cgi?product=DBus 2147 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \ 2148 defined(__linux__) || \ 2149 defined(__OpenBSD__) || \ 2151 # error Credentials passing not working on this OS is a regression! 2154 _dbus_verbose (
"Socket credentials not supported on this OS\n");
2158 _dbus_verbose (
"Credentials:" 2169 _DBUS_SET_OOM (error);
2178 _DBUS_SET_OOM (error);
2183 if (!add_linux_security_label_to_credentials (client_fd.fd, credentials))
2185 _DBUS_SET_OOM (error);
2213 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2215 if (write_credentials_byte (server_fd.fd, error))
2234 struct sockaddr addr;
2240 addrlen =
sizeof (addr);
2250 client_fd.fd = accept4 (listen_fd.fd, &addr, &addrlen, SOCK_CLOEXEC);
2251 cloexec_done = client_fd.fd >= 0;
2253 if (client_fd.fd < 0 && (errno == ENOSYS || errno == EINVAL))
2256 client_fd.fd = accept (listen_fd.fd, &addr, &addrlen);
2259 if (client_fd.fd < 0)
2265 _dbus_verbose (
"client fd %d accepted\n", client_fd.fd);
2288 const char *directory;
2291 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2293 directory = _dbus_string_get_const_data (dir);
2295 if (stat (directory, &sb) < 0)
2298 "%s", _dbus_strerror (errno));
2303 if (sb.st_uid != geteuid ())
2306 "%s directory is owned by user %lu, not %lu",
2308 (
unsigned long) sb.st_uid,
2309 (
unsigned long) geteuid ());
2313 if ((S_IROTH & sb.st_mode) || (S_IWOTH & sb.st_mode) ||
2314 (S_IRGRP & sb.st_mode) || (S_IWGRP & sb.st_mode))
2317 "%s directory is not private to the user", directory);
2325 fill_user_info_from_passwd (
struct passwd *p,
2332 info->
uid = p->pw_uid;
2353 const char *username_c;
2366 if (username !=
NULL)
2367 username_c = _dbus_string_get_const_data (username);
2376 #if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R) 2382 struct passwd p_str;
2385 buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
2391 if ((
long) buflen <= 0)
2405 #ifdef HAVE_POSIX_GETPWNAM_R 2407 result = getpwuid_r (uid, &p_str, buf, buflen,
2410 result = getpwnam_r (username_c, &p_str, buf, buflen,
2414 p = getpwuid_r (uid, &p_str, buf, buflen);
2416 p = getpwnam_r (username_c, &p_str, buf, buflen);
2420 if (result == ERANGE && buflen < 512 * 1024)
2430 if (result == 0 && p == &p_str)
2432 if (!fill_user_info_from_passwd (p, info, error))
2442 "User \"%s\" unknown or no memory to allocate password entry\n",
2443 username_c ? username_c :
"???");
2444 _dbus_verbose (
"User %s unknown\n", username_c ? username_c :
"???");
2457 p = getpwnam (username_c);
2461 if (!fill_user_info_from_passwd (p, info, error))
2469 "User \"%s\" unknown or no memory to allocate password entry\n",
2470 username_c ? username_c :
"???");
2471 _dbus_verbose (
"User %s unknown\n", username_c ? username_c :
"???");
2480 #ifdef HAVE_GETGROUPLIST 2485 int initial_buf_count;
2487 initial_buf_count = 17;
2488 buf_count = initial_buf_count;
2496 if (getgrouplist (username_c,
2498 buf, &buf_count) < 0)
2514 if (buf_count == initial_buf_count)
2529 if (getgrouplist (username_c, info->
primary_gid, buf, &buf_count) < 0)
2533 _dbus_warn (
"It appears that username \"%s\" is in more than %d groups.\nProceeding with just the first %d groups.",
2534 username_c, buf_count, buf_count);
2540 "Failed to get groups for username \"%s\" primary GID " 2543 _dbus_strerror (errno));
2558 for (i = 0; i < buf_count; ++i)
2581 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2586 _DBUS_ASSERT_ERROR_IS_SET (error);
2620 return fill_user_info (info, uid,
2638 _DBUS_STATIC_ASSERT (
sizeof (pid_t) <=
sizeof (
dbus_pid_t));
2639 _DBUS_STATIC_ASSERT (
sizeof (uid_t) <=
sizeof (
dbus_uid_t));
2640 _DBUS_STATIC_ASSERT (
sizeof (gid_t) <=
sizeof (
dbus_gid_t));
2722 if (_dbus_string_get_length (uid_str) == 0)
2724 _dbus_verbose (
"UID string was zero length\n");
2733 _dbus_verbose (
"could not parse string as a UID\n");
2737 if (end != _dbus_string_get_length (uid_str))
2739 _dbus_verbose (
"string contained trailing stuff after UID\n");
2754 static pthread_mutex_t atomic_mutex = PTHREAD_MUTEX_INITIALIZER;
2767 return __sync_add_and_fetch(&atomic->
value, 1)-1;
2771 pthread_mutex_lock (&atomic_mutex);
2772 res = atomic->
value;
2774 pthread_mutex_unlock (&atomic_mutex);
2790 return __sync_sub_and_fetch(&atomic->
value, 1)+1;
2794 pthread_mutex_lock (&atomic_mutex);
2795 res = atomic->
value;
2797 pthread_mutex_unlock (&atomic_mutex);
2814 __sync_synchronize ();
2815 return atomic->
value;
2819 pthread_mutex_lock (&atomic_mutex);
2820 res = atomic->
value;
2821 pthread_mutex_unlock (&atomic_mutex);
2838 int timeout_milliseconds)
2840 #if defined(HAVE_POLL) && !defined(BROKEN_POLL) 2842 if (timeout_milliseconds < -1)
2844 timeout_milliseconds = -1;
2849 timeout_milliseconds);
2852 fd_set read_set, write_set, err_set;
2858 FD_ZERO (&read_set);
2859 FD_ZERO (&write_set);
2862 for (i = 0; i < n_fds; i++)
2867 FD_SET (fdp->
fd, &read_set);
2870 FD_SET (fdp->
fd, &write_set);
2872 FD_SET (fdp->
fd, &err_set);
2874 max_fd = MAX (max_fd, fdp->
fd);
2877 tv.tv_sec = timeout_milliseconds / 1000;
2878 tv.tv_usec = (timeout_milliseconds % 1000) * 1000;
2880 ready = select (max_fd + 1, &read_set, &write_set, &err_set,
2881 timeout_milliseconds < 0 ?
NULL : &tv);
2885 for (i = 0; i < n_fds; i++)
2891 if (FD_ISSET (fdp->
fd, &read_set))
2894 if (FD_ISSET (fdp->
fd, &write_set))
2897 if (FD_ISSET (fdp->
fd, &err_set))
2917 #ifdef HAVE_MONOTONIC_CLOCK 2919 clock_gettime (CLOCK_MONOTONIC, &ts);
2922 *tv_sec = ts.tv_sec;
2924 *tv_usec = ts.tv_nsec / 1000;
2928 gettimeofday (&t,
NULL);
2933 *tv_usec = t.tv_usec;
2950 gettimeofday (&t,
NULL);
2955 *tv_usec = t.tv_usec;
2970 const char *filename_c;
2972 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2974 filename_c = _dbus_string_get_const_data (filename);
2976 if (mkdir (filename_c, 0700) < 0)
2978 if (errno == EEXIST)
2982 "Failed to create directory %s: %s\n",
2983 filename_c, _dbus_strerror (errno));
3002 const char *filename_c;
3004 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3006 filename_c = _dbus_string_get_const_data (filename);
3008 if (mkdir (filename_c, 0700) < 0)
3011 "Failed to create directory %s: %s\n",
3012 filename_c, _dbus_strerror (errno));
3036 if (_dbus_string_get_length (dir) == 0 ||
3037 _dbus_string_get_length (next_component) == 0)
3040 dir_ends_in_slash =
'/' == _dbus_string_get_byte (dir,
3041 _dbus_string_get_length (dir) - 1);
3043 file_starts_with_slash =
'/' == _dbus_string_get_byte (next_component, 0);
3045 if (dir_ends_in_slash && file_starts_with_slash)
3049 else if (!(dir_ends_in_slash || file_starts_with_slash))
3056 _dbus_string_get_length (dir));
3060 #define NANOSECONDS_PER_SECOND 1000000000 3062 #define MICROSECONDS_PER_SECOND 1000000 3064 #define MILLISECONDS_PER_SECOND 1000 3066 #define NANOSECONDS_PER_MILLISECOND 1000000 3068 #define MICROSECONDS_PER_MILLISECOND 1000 3077 #ifdef HAVE_NANOSLEEP 3078 struct timespec req;
3079 struct timespec rem;
3081 req.tv_sec = milliseconds / MILLISECONDS_PER_SECOND;
3082 req.tv_nsec = (milliseconds % MILLISECONDS_PER_SECOND) * NANOSECONDS_PER_MILLISECOND;
3086 while (nanosleep (&req, &rem) < 0 && errno == EINTR)
3088 #elif defined (HAVE_USLEEP) 3089 usleep (milliseconds * MICROSECONDS_PER_MILLISECOND);
3091 sleep (MAX (milliseconds / 1000, 1));
3113 old_len = _dbus_string_get_length (str);
3117 fd = open (
"/dev/urandom", O_RDONLY);
3122 "Could not open /dev/urandom: %s",
3123 _dbus_strerror (errno));
3127 _dbus_verbose (
"/dev/urandom fd %d opened\n", fd);
3131 if (result != n_bytes)
3135 "Could not read /dev/urandom: %s",
3136 _dbus_strerror (errno));
3139 "Short read from /dev/urandom");
3146 _dbus_verbose (
"Read %d bytes from /dev/urandom\n",
3174 _dbus_strerror (
int error_number)
3178 msg = strerror (error_number);
3191 signal (SIGPIPE, SIG_IGN);
3206 val = fcntl (fd, F_GETFD, 0);
3213 fcntl (fd, F_SETFD, val);
3227 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3236 "Could not close fd %d", fd);
3257 #ifdef F_DUPFD_CLOEXEC 3260 new_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
3261 cloexec_done = new_fd >= 0;
3263 if (new_fd < 0 && errno == EINVAL)
3266 new_fd = fcntl(fd, F_DUPFD, 3);
3272 "Could not duplicate fd %d", fd);
3276 #ifdef F_DUPFD_CLOEXEC 3297 return _dbus_set_fd_nonblocking (fd.fd, error);
3301 _dbus_set_fd_nonblocking (
int fd,
3306 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3308 val = fcntl (fd, F_GETFL, 0);
3312 "Failed to get flags from file descriptor %d: %s",
3313 fd, _dbus_strerror (errno));
3314 _dbus_verbose (
"Failed to get flags for fd %d: %s\n", fd,
3315 _dbus_strerror (errno));
3319 if (fcntl (fd, F_SETFL, val | O_NONBLOCK) < 0)
3322 "Failed to set nonblocking flag of file descriptor %d: %s",
3323 fd, _dbus_strerror (errno));
3324 _dbus_verbose (
"Failed to set fd %d nonblocking: %s\n",
3325 fd, _dbus_strerror (errno));
3341 #if defined (HAVE_BACKTRACE) && defined (DBUS_BUILT_R_DYNAMIC) 3347 bt_size = backtrace (bt, 500);
3349 syms = backtrace_symbols (bt, bt_size);
3355 fprintf (stderr,
" %s\n", syms[i]);
3361 #elif defined (HAVE_BACKTRACE) && ! defined (DBUS_BUILT_R_DYNAMIC) 3362 fprintf (stderr,
" D-Bus not built with -rdynamic so unable to print a backtrace\n");
3364 fprintf (stderr,
" D-Bus not compiled with backtrace support so unable to print a backtrace\n");
3386 #ifdef HAVE_SOCKETPAIR 3393 retval = socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fds);
3394 cloexec_done = retval >= 0;
3396 if (retval < 0 && (errno == EINVAL || errno == EPROTOTYPE))
3399 retval = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
3405 "Could not create full-duplex pipe");
3409 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3420 (!_dbus_set_fd_nonblocking (fds[0],
NULL) ||
3421 !_dbus_set_fd_nonblocking (fds[1],
NULL)))
3424 "Could not set full-duplex pipe nonblocking");
3435 _dbus_verbose (
"full-duplex pipe %d <-> %d\n",
3440 _dbus_warn (
"_dbus_socketpair() not implemented on this OS");
3442 "_dbus_socketpair() not implemented on this OS");
3459 char static_buf[1024];
3460 int bufsize =
sizeof (static_buf);
3464 DBUS_VA_COPY (args_copy, args);
3465 len = vsnprintf (static_buf, bufsize, format, args_copy);
3482 DBUS_VA_COPY (args_copy, args);
3484 if (vsnprintf (static_buf, 1, format, args_copy) == 1)
3503 DBUS_VA_COPY (args_copy, args);
3504 len = vsnprintf (buf, bufsize, format, args_copy);
3529 static const char* tmpdir =
NULL;
3541 tmpdir = getenv(
"TMPDIR");
3547 tmpdir = getenv(
"TMP");
3549 tmpdir = getenv(
"TEMP");
3584 _read_subprocess_line_argv (
const char *progpath,
3586 const char *
const *argv,
3590 int result_pipe[2] = { -1, -1 };
3591 int errors_pipe[2] = { -1, -1 };
3598 sigset_t new_set, old_set;
3600 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3607 sigemptyset (&new_set);
3608 sigaddset (&new_set, SIGCHLD);
3609 sigprocmask (SIG_BLOCK, &new_set, &old_set);
3611 orig_len = _dbus_string_get_length (result);
3615 if (pipe (result_pipe) < 0)
3618 "Failed to create a pipe to call %s: %s",
3619 progpath, _dbus_strerror (errno));
3620 _dbus_verbose (
"Failed to create a pipe to call %s: %s\n",
3621 progpath, _dbus_strerror (errno));
3624 if (pipe (errors_pipe) < 0)
3627 "Failed to create a pipe to call %s: %s",
3628 progpath, _dbus_strerror (errno));
3629 _dbus_verbose (
"Failed to create a pipe to call %s: %s\n",
3630 progpath, _dbus_strerror (errno));
3638 "Failed to fork() to call %s: %s",
3639 progpath, _dbus_strerror (errno));
3640 _dbus_verbose (
"Failed to fork() to call %s: %s\n",
3641 progpath, _dbus_strerror (errno));
3648 const char *error_str;
3652 int saved_errno = errno;
3657 if (write (errors_pipe[
WRITE_END], error_str, strlen (error_str)) < 0 ||
3658 write (errors_pipe[
WRITE_END],
": ", 2) < 0)
3663 error_str = _dbus_strerror (saved_errno);
3665 if (write (errors_pipe[
WRITE_END], error_str, strlen (error_str)) < 0)
3677 if (dup2 (result_pipe[
WRITE_END], 1) == -1)
3679 if (dup2 (errors_pipe[
WRITE_END], 2) == -1)
3684 sigprocmask (SIG_SETMASK, &old_set,
NULL);
3687 if (progpath[0] ==
'/')
3689 execv (progpath, (
char *
const *) argv);
3698 execvp (strrchr (progpath,
'/')+1, (
char *
const *) argv);
3701 execvp (progpath, (
char *
const *) argv);
3723 ret = waitpid (pid, &status, 0);
3725 while (ret == -1 && errno == EINTR);
3729 if (!WIFEXITED (status) || WEXITSTATUS (status) != 0 )
3735 _DBUS_SET_OOM (error);
3747 if (_dbus_string_get_length (&error_message) > 0)
3749 "%s terminated abnormally with the following error: %s",
3750 progpath, _dbus_string_get_data (&error_message));
3753 "%s terminated abnormally without any error message",
3761 sigprocmask (SIG_SETMASK, &old_set,
NULL);
3764 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3766 _DBUS_ASSERT_ERROR_IS_SET (error);
3768 if (result_pipe[0] != -1)
3769 close (result_pipe[0]);
3770 if (result_pipe[1] != -1)
3771 close (result_pipe[1]);
3772 if (errors_pipe[0] != -1)
3773 close (errors_pipe[0]);
3774 if (errors_pipe[1] != -1)
3775 close (errors_pipe[1]);
3799 static const char arg_dbus_launch[] =
"dbus-launch";
3800 static const char arg_autolaunch[] =
"--autolaunch";
3801 static const char arg_binary_syntax[] =
"--binary-syntax";
3802 static const char arg_close_stderr[] =
"--close-stderr";
3807 const char *display;
3808 const char *progpath;
3809 const char *argv[6];
3817 "Unable to autolaunch when setuid");
3821 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3834 if (display ==
NULL || display[0] ==
'\0')
3837 "Unable to autolaunch a dbus-daemon without a $DISPLAY for X11");
3843 _DBUS_SET_OOM (error);
3852 #ifdef DBUS_ENABLE_EMBEDDED_TESTS 3855 if (progpath ==
NULL)
3857 progpath = DBUS_BINDIR
"/dbus-launch";
3864 argv[i] = arg_dbus_launch;
3866 argv[i] = arg_autolaunch;
3868 argv[i] = _dbus_string_get_data (&uuid);
3870 argv[i] = arg_binary_syntax;
3872 argv[i] = arg_close_stderr;
3879 retval = _read_subprocess_line_argv (progpath,
3881 argv, address, error);
3888 "Using X11 for dbus-daemon autolaunch was disabled at compile time, " 3889 "set your DBUS_SESSION_BUS_ADDRESS instead");
3934 if (create_if_not_found)
3946 if (!create_if_not_found)
3949 "D-Bus library appears to be incorrectly set up: " 3950 "see the manual page for dbus-uuidgen to correct " 3951 "this issue. (%s; %s)",
3979 const char *launchd_env_var,
3982 #ifdef DBUS_ENABLE_LAUNCHD 3986 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3991 "Unable to find launchd socket when setuid");
3996 argv[i] =
"launchctl";
4000 argv[i] = (
char*)launchd_env_var;
4007 if (!_read_subprocess_line_argv(argv[0],
TRUE, argv, socket_path, error))
4013 if (_dbus_string_get_length(socket_path) == 0)
4023 "can't lookup socket from launchd; launchd support not compiled in");
4028 #ifdef DBUS_ENABLE_LAUNCHD 4038 "Unable to find launchd socket when setuid");
4044 _DBUS_SET_OOM (error);
4059 "launchd did not provide a socket path, " 4060 "verify that org.freedesktop.dbus-session.plist is loaded!");
4066 _DBUS_SET_OOM (error);
4071 _dbus_string_get_length (address)))
4073 _DBUS_SET_OOM (error);
4088 const char *runtime_dir =
_dbus_getenv (
"XDG_RUNTIME_DIR");
4093 if (runtime_dir ==
NULL)
4095 _dbus_verbose (
"XDG_RUNTIME_DIR not found in environment");
4102 _DBUS_SET_OOM (error);
4108 _DBUS_SET_OOM (error);
4112 if (lstat (_dbus_string_get_const_data (&user_bus_path), &stbuf) == -1)
4114 _dbus_verbose (
"XDG_RUNTIME_DIR/bus not available: %s",
4115 _dbus_strerror (errno));
4121 if (stbuf.st_uid != getuid ())
4123 _dbus_verbose (
"XDG_RUNTIME_DIR/bus owned by uid %ld, not our uid %ld",
4124 (
long) stbuf.st_uid, (
long) getuid ());
4130 if ((stbuf.st_mode & S_IFMT) != S_IFSOCK)
4132 _dbus_verbose (
"XDG_RUNTIME_DIR/bus is not a socket: st_mode = 0o%lo",
4133 (
long) stbuf.st_mode);
4142 _DBUS_SET_OOM (error);
4178 #ifdef DBUS_ENABLE_LAUNCHD 4180 return _dbus_lookup_session_address_launchd (address, error);
4184 if (!_dbus_lookup_user_bus (supported, address, error))
4186 else if (*supported)
4244 #ifdef DBUS_ENABLE_EMBEDDED_TESTS 4246 const char *
override;
4249 if (
override !=
NULL && *
override !=
'\0')
4255 _dbus_verbose (
"Using fake homedir for testing: %s\n",
4256 _dbus_string_get_const_data (&homedir));
4263 if (!already_warned)
4265 _dbus_warn (
"Using %s for testing, set DBUS_TEST_HOMEDIR to avoid",
4266 _dbus_string_get_const_data (&homedir));
4267 already_warned =
TRUE;
4279 directory, _dbus_string_get_length (directory))) {
4293 _dbus_daemon_publish_session_bus_address (
const char* addr,
4301 _dbus_daemon_unpublish_session_bus_address (
void)
4315 return e == EAGAIN || e == EWOULDBLOCK;
4329 const char *filename_c;
4331 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4333 filename_c = _dbus_string_get_const_data (filename);
4335 if (rmdir (filename_c) != 0)
4338 "Failed to remove directory %s: %s\n",
4339 filename_c, _dbus_strerror (errno));
4359 struct sockaddr_storage storage;
4360 struct sockaddr_un un;
4363 socklen_t sa_len =
sizeof(sa_buf);
4367 if (getsockname(fd.fd, &sa_buf.sa, &sa_len) < 0)
4370 return sa_buf.sa.sa_family == AF_UNIX;
4393 d = opendir (
"/proc/self/fd");
4407 if (de->d_name[0] ==
'.')
4411 l = strtol (de->d_name, &e, 10);
4412 if (errno != 0 || e ==
NULL || *e !=
'\0')
4419 if (fd == dirfd (d))
4430 maxfds = sysconf (_SC_OPEN_MAX);
4439 for (i = 3; i < maxfds; i++)
4458 #if 0 && defined(HAVE_LIBC_ENABLE_SECURE) 4461 extern int __libc_enable_secure;
4462 return __libc_enable_secure;
4464 #elif defined(HAVE_ISSETUGID) 4466 return issetugid ();
4468 uid_t ruid, euid, suid;
4469 gid_t rgid, egid, sgid;
4476 if (_DBUS_UNLIKELY (!check_setuid_initialised))
4478 #ifdef HAVE_GETRESUID 4479 if (getresuid (&ruid, &euid, &suid) != 0 ||
4480 getresgid (&rgid, &egid, &sgid) != 0)
4483 suid = ruid = getuid ();
4484 sgid = rgid = getgid ();
4489 check_setuid_initialised =
TRUE;
4490 is_setuid = (ruid != euid || ruid != suid ||
4491 rgid != egid || rgid != sgid);
4512 struct sockaddr_storage storage;
4513 struct sockaddr_un un;
4514 struct sockaddr_in ipv4;
4515 struct sockaddr_in6 ipv6;
4517 char hostip[INET6_ADDRSTRLEN];
4518 socklen_t size =
sizeof (socket);
4521 if (getsockname (fd.fd, &socket.sa, &size))
4524 switch (socket.sa.sa_family)
4527 if (socket.un.sun_path[0]==
'\0')
4543 if (inet_ntop (AF_INET, &socket.ipv4.sin_addr, hostip, sizeof (hostip)))
4545 hostip, ntohs (socket.ipv4.sin_port)))
4551 if (inet_ntop (AF_INET6, &socket.ipv6.sin6_addr, hostip, sizeof (hostip)))
4553 ntohs (socket.ipv6.sin6_port)) &&
4561 "Failed to read address from socket: Unknown socket type.");
4567 "Failed to open socket: %s",
4568 _dbus_strerror (errno));
4573 _dbus_save_socket_errno (
void)
4579 _dbus_restore_socket_errno (
int saved_errno)
4581 errno = saved_errno;
4584 static const char *syslog_tag =
"dbus";
4585 #ifdef HAVE_SYSLOG_H 4586 static DBusLogFlags log_flags = DBUS_LOG_FLAGS_STDERR;
4609 (flags & (DBUS_LOG_FLAGS_STDERR | DBUS_LOG_FLAGS_SYSTEM_LOG)) != 0);
4613 #ifdef HAVE_SYSLOG_H 4616 if (log_flags & DBUS_LOG_FLAGS_SYSTEM_LOG)
4617 openlog (tag, LOG_PID, LOG_DAEMON);
4634 #ifdef HAVE_SYSLOG_H 4635 if (log_flags & DBUS_LOG_FLAGS_SYSTEM_LOG)
4640 case DBUS_SYSTEM_LOG_INFO:
4641 flags = LOG_DAEMON | LOG_INFO;
4643 case DBUS_SYSTEM_LOG_WARNING:
4644 flags = LOG_DAEMON | LOG_WARNING;
4646 case DBUS_SYSTEM_LOG_SECURITY:
4647 flags = LOG_AUTH | LOG_NOTICE;
4649 case DBUS_SYSTEM_LOG_ERROR:
4650 flags = LOG_DAEMON|LOG_CRIT;
4656 DBUS_VA_COPY (tmp, args);
4657 vsyslog (flags, msg, tmp);
4663 if (log_flags & DBUS_LOG_FLAGS_STDERR)
4666 DBUS_VA_COPY (tmp, args);
4668 vfprintf (stderr, msg, tmp);
4669 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.