31 #include "dbus-internals.h"
32 #include "dbus-sysdeps.h"
33 #include "dbus-sysdeps-unix.h"
34 #include "dbus-threads.h"
35 #include "dbus-protocol.h"
36 #include "dbus-file.h"
37 #include "dbus-transport.h"
38 #include "dbus-string.h"
39 #include "dbus-userdb.h"
40 #include "dbus-list.h"
41 #include "dbus-credentials.h"
42 #include "dbus-nonce.h"
44 #include <sys/types.h>
51 #include <sys/socket.h>
60 #include <netinet/in.h>
61 #include <netinet/tcp.h>
64 #include <arpa/inet.h>
78 #ifdef HAVE_GETPEERUCRED
90 #include <systemd/sd-daemon.h>
101 #ifndef AI_ADDRCONFIG
102 #define AI_ADDRCONFIG 0
105 #ifndef HAVE_SOCKLEN_T
106 #define socklen_t int
109 #if defined (__sun) || defined (__sun__) || (defined(_AIX) && !defined(_LINUX_SOURCE_COMPAT))
122 # define CMSG_ALIGN(len) _CMSG_DATA_ALIGN (len)
125 # define CMSG_ALIGN(len) (((len) + sizeof (long) - 1) & \
126 ~(sizeof (long) - 1))
131 # define CMSG_SPACE(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + \
136 # define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
157 const char **error_str_p)
159 static int const relevant_flag[] = { DBUS_FORCE_STDIN_NULL,
160 DBUS_FORCE_STDOUT_NULL,
161 DBUS_FORCE_STDERR_NULL };
163 const char *error_str =
"Failed mysteriously";
167 _DBUS_STATIC_ASSERT (STDIN_FILENO == 0);
168 _DBUS_STATIC_ASSERT (STDOUT_FILENO == 1);
169 _DBUS_STATIC_ASSERT (STDERR_FILENO == 2);
172 for (i = STDIN_FILENO; i <= STDERR_FILENO; i++)
178 devnull = open (
"/dev/null", O_RDWR);
182 error_str =
"Failed to open /dev/null";
191 if (devnull != i && (flags & relevant_flag[i]) != 0)
193 if (dup2 (devnull, i) < 0)
195 error_str =
"Failed to dup2 /dev/null onto a standard fd";
206 if (devnull > STDERR_FILENO)
209 if (error_str_p !=
NULL)
210 *error_str_p = error_str;
213 return (error_str ==
NULL);
216 static dbus_bool_t _dbus_set_fd_nonblocking (
int fd,
220 _dbus_open_socket (
int *fd_p,
229 *fd_p = socket (domain, type | SOCK_CLOEXEC, protocol);
230 cloexec_done = *fd_p >= 0;
233 if (*fd_p < 0 && (errno == EINVAL || errno == EPROTOTYPE))
236 *fd_p = socket (domain, type, protocol);
248 _dbus_verbose (
"socket fd %d opened\n", *fd_p);
255 "Failed to open socket: %s",
256 _dbus_strerror (errno));
272 _dbus_open_unix_socket (
int *fd,
275 return _dbus_open_socket(fd, PF_UNIX, SOCK_STREAM, 0, error);
326 #if HAVE_DECL_MSG_NOSIGNAL
330 data = _dbus_string_get_const_data_len (buffer, start, len);
334 bytes_written = send (fd.fd, data, len, MSG_NOSIGNAL);
336 if (bytes_written < 0 && errno == EINTR)
339 return bytes_written;
364 #ifndef HAVE_UNIX_FD_PASSING
382 start = _dbus_string_get_length (buffer);
402 m.msg_controllen = CMSG_SPACE(*n_fds *
sizeof(
int));
406 m.msg_control = alloca(m.msg_controllen);
407 memset(m.msg_control, 0, m.msg_controllen);
413 m.msg_controllen = CMSG_LEN (*n_fds *
sizeof(
int));
417 bytes_read = recvmsg (fd.fd, &m, 0
418 #ifdef MSG_CMSG_CLOEXEC
439 if (m.msg_flags & MSG_CTRUNC)
451 for (cm = CMSG_FIRSTHDR(&m); cm; cm = CMSG_NXTHDR(&m, cm))
452 if (cm->cmsg_level == SOL_SOCKET && cm->cmsg_type == SCM_RIGHTS)
455 int *payload = (
int *) CMSG_DATA (cm);
456 size_t payload_len_bytes = (cm->cmsg_len - CMSG_LEN (0));
457 size_t payload_len_fds = payload_len_bytes /
sizeof (int);
463 _DBUS_STATIC_ASSERT (
sizeof (
size_t) >=
sizeof (
int));
465 if (_DBUS_LIKELY (payload_len_fds <= (
size_t) *n_fds))
468 fds_to_use = payload_len_fds;
476 fds_to_use = (size_t) *n_fds;
481 for (i = fds_to_use; i < payload_len_fds; i++)
487 memcpy (fds, payload, fds_to_use *
sizeof (
int));
491 *n_fds = (int) fds_to_use;
496 for (i = 0; i < fds_to_use; i++)
519 _dbus_write_socket_with_unix_fds(
DBusSocket fd,
526 #ifndef HAVE_UNIX_FD_PASSING
535 return _dbus_write_socket_with_unix_fds_two(fd, buffer, start, len,
NULL, 0, 0, fds, n_fds);
540 _dbus_write_socket_with_unix_fds_two(
DBusSocket fd,
550 #ifndef HAVE_UNIX_FD_PASSING
558 buffer1, start1, len1,
559 buffer2, start2, len2);
572 iov[0].iov_base = (
char*) _dbus_string_get_const_data_len (buffer1, start1, len1);
573 iov[0].iov_len = len1;
577 iov[1].iov_base = (
char*) _dbus_string_get_const_data_len (buffer2, start2, len2);
578 iov[1].iov_len = len2;
583 m.msg_iovlen = buffer2 ? 2 : 1;
587 m.msg_controllen = CMSG_SPACE(n_fds *
sizeof(
int));
588 m.msg_control = alloca(m.msg_controllen);
589 memset(m.msg_control, 0, m.msg_controllen);
591 cm = CMSG_FIRSTHDR(&m);
592 cm->cmsg_level = SOL_SOCKET;
593 cm->cmsg_type = SCM_RIGHTS;
594 cm->cmsg_len = CMSG_LEN(n_fds *
sizeof(
int));
595 memcpy(CMSG_DATA(cm), fds, n_fds *
sizeof(
int));
600 bytes_written = sendmsg (fd.fd, &m, 0
601 #
if HAVE_DECL_MSG_NOSIGNAL
606 if (bytes_written < 0 && errno == EINTR)
610 if (bytes_written > 0)
614 return bytes_written;
640 #if HAVE_DECL_MSG_NOSIGNAL
641 struct iovec vectors[2];
653 data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
656 data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
664 vectors[0].iov_base = (
char*) data1;
665 vectors[0].iov_len = len1;
666 vectors[1].iov_base = (
char*) data2;
667 vectors[1].iov_len = len2;
671 m.msg_iovlen = data2 ? 2 : 1;
675 bytes_written = sendmsg (fd.fd, &m, MSG_NOSIGNAL);
677 if (bytes_written < 0 && errno == EINTR)
680 return bytes_written;
684 buffer2, start2, len2);
715 start = _dbus_string_get_length (buffer);
727 bytes_read = read (fd, data, count);
773 data = _dbus_string_get_const_data_len (buffer, start, len);
777 bytes_written = write (fd, data, len);
779 if (bytes_written < 0 && errno == EINTR)
783 if (bytes_written > 0)
787 return bytes_written;
827 struct iovec vectors[2];
832 data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
835 data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
843 vectors[0].iov_base = (
char*) data1;
844 vectors[0].iov_len = len1;
845 vectors[1].iov_base = (
char*) data2;
846 vectors[1].iov_len = len2;
850 bytes_written = writev (fd,
854 if (bytes_written < 0 && errno == EINTR)
857 return bytes_written;
864 if (ret1 == len1 && buffer2 !=
NULL)
878 #define _DBUS_MAX_SUN_PATH_LENGTH 99
916 struct sockaddr_un addr;
918 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
920 _dbus_verbose (
"connecting to unix socket %s abstract=%d\n",
924 if (!_dbus_open_unix_socket (&fd, error))
926 _DBUS_ASSERT_ERROR_IS_SET(error);
929 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
932 addr.sun_family = AF_UNIX;
933 path_len = strlen (path);
937 #ifdef HAVE_ABSTRACT_SOCKETS
938 addr.sun_path[0] =
'\0';
941 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
944 "Abstract socket name too long\n");
949 strncpy (&addr.sun_path[1], path, path_len);
953 "Operating system does not support abstract socket namespace\n");
960 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
963 "Socket name too long\n");
968 strncpy (addr.sun_path, path, path_len);
971 if (connect (fd, (
struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (
struct sockaddr_un, sun_path) + path_len) < 0)
975 "Failed to connect to socket %s: %s",
976 path, _dbus_strerror (errno));
982 if (!_dbus_set_fd_nonblocking (fd, error))
984 _DBUS_ASSERT_ERROR_IS_SET (error);
1015 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1017 _dbus_verbose (
"connecting to process %s\n", path);
1020 retval = socketpair (AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fds);
1021 cloexec_done = (retval >= 0);
1023 if (retval < 0 && (errno == EINVAL || errno == EPROTOTYPE))
1026 retval = socketpair (AF_UNIX, SOCK_STREAM, 0, fds);
1033 "Failed to create socket pair: %s",
1034 _dbus_strerror (errno));
1049 "Failed to fork() to call %s: %s",
1050 path, _dbus_strerror (errno));
1061 dup2 (fds[1], STDIN_FILENO);
1062 dup2 (fds[1], STDOUT_FILENO);
1064 if (fds[1] != STDIN_FILENO &&
1065 fds[1] != STDOUT_FILENO)
1073 execvp (path, argv);
1075 fprintf (stderr,
"Failed to execute process %s: %s\n", path, _dbus_strerror (errno));
1083 if (!_dbus_set_fd_nonblocking (fds[0], error))
1085 _DBUS_ASSERT_ERROR_IS_SET (error);
1117 struct sockaddr_un addr;
1120 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1122 _dbus_verbose (
"listening on unix socket %s abstract=%d\n",
1125 if (!_dbus_open_unix_socket (&listen_fd, error))
1127 _DBUS_ASSERT_ERROR_IS_SET(error);
1130 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1133 addr.sun_family = AF_UNIX;
1134 path_len = strlen (path);
1138 #ifdef HAVE_ABSTRACT_SOCKETS
1142 addr.sun_path[0] =
'\0';
1145 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
1148 "Abstract socket name too long\n");
1153 strncpy (&addr.sun_path[1], path, path_len);
1157 "Operating system does not support abstract socket namespace\n");
1177 if (stat (path, &sb) == 0 &&
1178 S_ISSOCK (sb.st_mode))
1182 if (path_len > _DBUS_MAX_SUN_PATH_LENGTH)
1185 "Socket name too long\n");
1190 strncpy (addr.sun_path, path, path_len);
1193 if (bind (listen_fd, (
struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (
struct sockaddr_un, sun_path) + path_len) < 0)
1196 "Failed to bind socket \"%s\": %s",
1197 path, _dbus_strerror (errno));
1202 if (listen (listen_fd, 30 ) < 0)
1205 "Failed to listen on socket \"%s\": %s",
1206 path, _dbus_strerror (errno));
1211 if (!_dbus_set_fd_nonblocking (listen_fd, error))
1213 _DBUS_ASSERT_ERROR_IS_SET (error);
1221 if (!
abstract && chmod (path, 0777) < 0)
1222 _dbus_warn (
"Could not set mode 0777 on socket %s\n",
1247 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1249 n = sd_listen_fds (
TRUE);
1253 "Failed to acquire systemd socket: %s",
1254 _dbus_strerror (-n));
1261 "No socket received.");
1265 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1267 r = sd_is_socket (fd, AF_UNSPEC, SOCK_STREAM, 1);
1271 "Failed to verify systemd socket type: %s",
1272 _dbus_strerror (-r));
1279 "Passed socket has wrong type.");
1291 "Failed to allocate file handle array.");
1295 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1297 if (!_dbus_set_fd_nonblocking (fd, error))
1299 _DBUS_ASSERT_ERROR_IS_SET (error);
1303 new_fds[fd - SD_LISTEN_FDS_START].fd = fd;
1311 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++)
1320 "dbus was compiled without systemd support");
1344 return _dbus_connect_tcp_socket_with_nonce (host, port, family, (
const char*)
NULL, error);
1348 _dbus_connect_tcp_socket_with_nonce (
const char *host,
1351 const char *noncefile,
1354 int saved_errno = 0;
1357 struct addrinfo hints;
1358 struct addrinfo *ai, *tmp;
1360 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1365 hints.ai_family = AF_UNSPEC;
1366 else if (!strcmp(family,
"ipv4"))
1367 hints.ai_family = AF_INET;
1368 else if (!strcmp(family,
"ipv6"))
1369 hints.ai_family = AF_INET6;
1374 "Unknown address family %s", family);
1375 return _dbus_socket_get_invalid ();
1377 hints.ai_protocol = IPPROTO_TCP;
1378 hints.ai_socktype = SOCK_STREAM;
1379 hints.ai_flags = AI_ADDRCONFIG;
1381 if ((res = getaddrinfo(host, port, &hints, &ai)) != 0)
1385 "Failed to lookup host/port: \"%s:%s\": %s (%d)",
1386 host, port, gai_strerror(res), res);
1387 return _dbus_socket_get_invalid ();
1393 if (!_dbus_open_socket (&fd.fd, tmp->ai_family, SOCK_STREAM, 0, error))
1396 _DBUS_ASSERT_ERROR_IS_SET(error);
1397 return _dbus_socket_get_invalid ();
1399 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1401 if (connect (fd.fd, (
struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
1403 saved_errno = errno;
1418 "Failed to connect to socket \"%s:%s\" %s",
1419 host, port, _dbus_strerror(saved_errno));
1420 return _dbus_socket_get_invalid ();
1423 if (noncefile !=
NULL)
1428 ret = _dbus_send_nonce (fd, &noncefileStr, error);
1434 return _dbus_socket_get_invalid ();
1438 if (!_dbus_set_fd_nonblocking (fd.fd, error))
1441 return _dbus_socket_get_invalid ();
1472 int nlisten_fd = 0, res, i;
1474 struct addrinfo hints;
1475 struct addrinfo *ai, *tmp;
1476 unsigned int reuseaddr;
1479 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1484 hints.ai_family = AF_UNSPEC;
1485 else if (!strcmp(family,
"ipv4"))
1486 hints.ai_family = AF_INET;
1487 else if (!strcmp(family,
"ipv6"))
1488 hints.ai_family = AF_INET6;
1493 "Unknown address family %s", family);
1497 hints.ai_protocol = IPPROTO_TCP;
1498 hints.ai_socktype = SOCK_STREAM;
1499 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
1501 redo_lookup_with_port:
1503 if ((res = getaddrinfo(host, port, &hints, &ai)) != 0 || !ai)
1507 "Failed to lookup host/port: \"%s:%s\": %s (%d)",
1508 host ? host :
"*", port, gai_strerror(res), res);
1515 int fd = -1, tcp_nodelay_on;
1518 if (!_dbus_open_socket (&fd, tmp->ai_family, SOCK_STREAM, 0, error))
1520 _DBUS_ASSERT_ERROR_IS_SET(error);
1523 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
1526 if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
sizeof(reuseaddr))==-1)
1528 _dbus_warn (
"Failed to set socket option \"%s:%s\": %s",
1529 host ? host :
"*", port, _dbus_strerror (errno));
1535 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &tcp_nodelay_on,
sizeof (tcp_nodelay_on)) == -1)
1537 _dbus_warn (
"Failed to set TCP_NODELAY socket option \"%s:%s\": %s",
1538 host ? host :
"*", port, _dbus_strerror (errno));
1541 if (bind (fd, (
struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
1543 saved_errno = errno;
1545 if (saved_errno == EADDRINUSE)
1563 "Failed to bind socket \"%s:%s\": %s",
1564 host ? host :
"*", port, _dbus_strerror (saved_errno));
1568 if (listen (fd, 30 ) < 0)
1570 saved_errno = errno;
1573 "Failed to listen on socket \"%s:%s\": %s",
1574 host ? host :
"*", port, _dbus_strerror (saved_errno));
1581 saved_errno = errno;
1584 "Failed to allocate file handle array: %s",
1585 _dbus_strerror (saved_errno));
1588 listen_fd = newlisten_fd;
1589 listen_fd[nlisten_fd].fd = fd;
1592 if (!_dbus_string_get_length(retport))
1598 if (!port || !strcmp(port,
"0"))
1601 struct sockaddr_storage addr;
1605 addrlen =
sizeof(addr);
1606 result = getsockname(fd, (
struct sockaddr*) &addr, &addrlen);
1609 (res = getnameinfo ((
struct sockaddr*)&addr, addrlen,
NULL, 0,
1610 portbuf,
sizeof(portbuf),
1611 NI_NUMERICHOST | NI_NUMERICSERV)) != 0)
1614 "Failed to resolve port \"%s:%s\": %s (%s)",
1615 host ? host :
"*", port, gai_strerror(res), res);
1625 port = _dbus_string_get_const_data(retport);
1627 goto redo_lookup_with_port;
1648 "Failed to bind socket \"%s:%s\": %s",
1649 host ? host :
"*", port, _dbus_strerror (errno));
1653 for (i = 0 ; i < nlisten_fd ; i++)
1655 if (!_dbus_set_fd_nonblocking (listen_fd[i].fd, error))
1668 for (i = 0 ; i < nlisten_fd ; i++)
1675 write_credentials_byte (
int server_fd,
1679 char buf[1] = {
'\0' };
1680 #if defined(HAVE_CMSGCRED)
1683 char cred[CMSG_SPACE (
sizeof (
struct cmsgcred))];
1694 msg.msg_control = (caddr_t) &cmsg;
1695 msg.msg_controllen = CMSG_SPACE (
sizeof (
struct cmsgcred));
1697 cmsg.hdr.cmsg_len = CMSG_LEN (
sizeof (
struct cmsgcred));
1698 cmsg.hdr.cmsg_level = SOL_SOCKET;
1699 cmsg.hdr.cmsg_type = SCM_CREDS;
1702 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1706 #if defined(HAVE_CMSGCRED)
1707 bytes_written = sendmsg (server_fd, &msg, 0
1708 #
if HAVE_DECL_MSG_NOSIGNAL
1716 if (bytes_written < 0 && errno == EINVAL)
1719 bytes_written = send (server_fd, buf, 1, 0
1720 #
if HAVE_DECL_MSG_NOSIGNAL
1726 if (bytes_written < 0 && errno == EINTR)
1729 if (bytes_written < 0)
1732 "Failed to write credentials byte: %s",
1733 _dbus_strerror (errno));
1736 else if (bytes_written == 0)
1739 "wrote zero bytes writing credentials byte");
1745 _dbus_verbose (
"wrote credentials byte\n");
1752 add_linux_security_label_to_credentials (
int client_fd,
1755 #if defined(__linux__) && defined(SO_PEERSEC)
1757 socklen_t len = 1024;
1764 while (getsockopt (client_fd, SOL_SOCKET, SO_PEERSEC,
1765 _dbus_string_get_data (&buf), &len) < 0)
1769 _dbus_verbose (
"getsockopt failed with %s, len now %lu\n",
1770 _dbus_strerror (e), (
unsigned long) len);
1772 if (e != ERANGE || len <= _dbus_string_get_length_uint (&buf))
1774 _dbus_verbose (
"Failed to getsockopt(SO_PEERSEC): %s\n",
1775 _dbus_strerror (e));
1787 _dbus_verbose (
"will try again with %lu\n", (
unsigned long) len);
1792 _dbus_verbose (
"getsockopt(SO_PEERSEC) yielded <= 0 bytes: %lu\n",
1793 (
unsigned long) len);
1797 if (len > _dbus_string_get_length_uint (&buf))
1799 _dbus_verbose (
"%lu > %u", (
unsigned long) len,
1800 _dbus_string_get_length_uint (&buf));
1804 if (_dbus_string_get_byte (&buf, len - 1) == 0)
1808 _dbus_verbose (
"subtracting trailing \\0\n");
1819 if (strlen (_dbus_string_get_const_data (&buf)) != len)
1824 _dbus_verbose (
"security label from kernel had an embedded \\0, "
1829 _dbus_verbose (
"getsockopt(SO_PEERSEC): %lu bytes excluding \\0: %s\n",
1830 (
unsigned long) len,
1831 _dbus_string_get_const_data (&buf));
1834 _dbus_string_get_const_data (&buf)))
1901 #ifdef HAVE_CMSGCRED
1904 char cred[CMSG_SPACE (
sizeof (
struct cmsgcred))];
1912 _DBUS_STATIC_ASSERT (
sizeof (pid_t) <=
sizeof (
dbus_pid_t));
1913 _DBUS_STATIC_ASSERT (
sizeof (uid_t) <=
sizeof (
dbus_uid_t));
1914 _DBUS_STATIC_ASSERT (
sizeof (gid_t) <=
sizeof (
dbus_gid_t));
1919 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1923 iov.iov_base = &buf;
1930 #if defined(HAVE_CMSGCRED)
1932 msg.msg_control = (caddr_t) &cmsg;
1933 msg.msg_controllen = CMSG_SPACE (
sizeof (
struct cmsgcred));
1937 bytes_read = recvmsg (client_fd.fd, &msg, 0);
1950 "Failed to read credentials byte: %s",
1951 _dbus_strerror (errno));
1954 else if (bytes_read == 0)
1960 "Failed to read credentials byte (zero-length read)");
1963 else if (buf !=
'\0')
1966 "Credentials byte was not nul");
1970 _dbus_verbose (
"read credentials byte\n");
1983 struct sockpeercred cr;
1987 int cr_len =
sizeof (cr);
1989 if (getsockopt (client_fd.fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len) != 0)
1991 _dbus_verbose (
"Failed to getsockopt(SO_PEERCRED): %s\n",
1992 _dbus_strerror (errno));
1994 else if (cr_len !=
sizeof (cr))
1996 _dbus_verbose (
"Failed to getsockopt(SO_PEERCRED), returned %d bytes, expected %d\n",
1997 cr_len, (
int)
sizeof (cr));
2004 #elif defined(HAVE_UNPCBID) && defined(LOCAL_PEEREID)
2008 socklen_t cr_len =
sizeof (cr);
2010 if (getsockopt (client_fd.fd, 0, LOCAL_PEEREID, &cr, &cr_len) != 0)
2012 _dbus_verbose (
"Failed to getsockopt(LOCAL_PEEREID): %s\n",
2013 _dbus_strerror (errno));
2015 else if (cr_len !=
sizeof (cr))
2017 _dbus_verbose (
"Failed to getsockopt(LOCAL_PEEREID), returned %d bytes, expected %d\n",
2018 cr_len, (
int)
sizeof (cr));
2022 pid_read = cr.unp_pid;
2023 uid_read = cr.unp_euid;
2025 #elif defined(HAVE_CMSGCRED)
2034 struct cmsgcred *cred;
2035 struct cmsghdr *cmsgp;
2037 for (cmsgp = CMSG_FIRSTHDR (&msg);
2039 cmsgp = CMSG_NXTHDR (&msg, cmsgp))
2041 if (cmsgp->cmsg_type == SCM_CREDS &&
2042 cmsgp->cmsg_level == SOL_SOCKET &&
2043 cmsgp->cmsg_len >= CMSG_LEN (
sizeof (
struct cmsgcred)))
2045 cred = (
struct cmsgcred *) CMSG_DATA (cmsgp);
2046 pid_read = cred->cmcred_pid;
2047 uid_read = cred->cmcred_euid;
2052 #elif defined(HAVE_GETPEERUCRED)
2056 ucred_t * ucred =
NULL;
2057 if (getpeerucred (client_fd.fd, &ucred) == 0)
2059 pid_read = ucred_getpid (ucred);
2060 uid_read = ucred_geteuid (ucred);
2063 adt_session_data_t *adth =
NULL;
2064 adt_export_data_t *data =
NULL;
2066 if (adt_start_session (&adth,
NULL, 0) || (adth ==
NULL))
2068 _dbus_verbose (
"Failed to adt_start_session(): %s\n", _dbus_strerror (errno));
2072 if (adt_set_from_ucred (adth, ucred, ADT_NEW))
2074 _dbus_verbose (
"Failed to adt_set_from_ucred(): %s\n", _dbus_strerror (errno));
2078 size = adt_export_session_data (adth, &data);
2081 _dbus_verbose (
"Failed to adt_export_session_data(): %s\n", _dbus_strerror (errno));
2089 (void) adt_end_session (adth);
2095 _dbus_verbose (
"Failed to getpeerucred() credentials: %s\n", _dbus_strerror (errno));
2105 #elif defined(HAVE_GETPEEREID)
2123 if (getpeereid (client_fd.fd, &euid, &egid) == 0)
2129 _dbus_verbose (
"Failed to getpeereid() credentials: %s\n", _dbus_strerror (errno));
2133 #warning Socket credentials not supported on this Unix OS
2134 #warning Please tell https://bugs.freedesktop.org/enter_bug.cgi?product=DBus
2140 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
2141 defined(__linux__) || \
2142 defined(__OpenBSD__) || \
2144 # error Credentials passing not working on this OS is a regression!
2147 _dbus_verbose (
"Socket credentials not supported on this OS\n");
2151 _dbus_verbose (
"Credentials:"
2162 _DBUS_SET_OOM (error);
2171 _DBUS_SET_OOM (error);
2176 if (!add_linux_security_label_to_credentials (client_fd.fd, credentials))
2178 _DBUS_SET_OOM (error);
2206 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2208 if (write_credentials_byte (server_fd.fd, error))
2227 struct sockaddr addr;
2233 addrlen =
sizeof (addr);
2243 client_fd.fd = accept4 (listen_fd.fd, &addr, &addrlen, SOCK_CLOEXEC);
2244 cloexec_done = client_fd.fd >= 0;
2246 if (client_fd.fd < 0 && (errno == ENOSYS || errno == EINVAL))
2249 client_fd.fd = accept (listen_fd.fd, &addr, &addrlen);
2252 if (client_fd.fd < 0)
2258 _dbus_verbose (
"client fd %d accepted\n", client_fd.fd);
2281 const char *directory;
2284 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2286 directory = _dbus_string_get_const_data (dir);
2288 if (stat (directory, &sb) < 0)
2291 "%s", _dbus_strerror (errno));
2296 if (sb.st_uid != geteuid ())
2299 "%s directory is owned by user %lu, not %lu",
2301 (
unsigned long) sb.st_uid,
2302 (
unsigned long) geteuid ());
2306 if ((S_IROTH & sb.st_mode) || (S_IWOTH & sb.st_mode) ||
2307 (S_IRGRP & sb.st_mode) || (S_IWGRP & sb.st_mode))
2310 "%s directory is not private to the user", directory);
2318 fill_user_info_from_passwd (
struct passwd *p,
2325 info->
uid = p->pw_uid;
2346 const char *username_c;
2359 if (username !=
NULL)
2360 username_c = _dbus_string_get_const_data (username);
2369 #if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)
2375 struct passwd p_str;
2378 buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
2384 if ((
long) buflen <= 0)
2398 #ifdef HAVE_POSIX_GETPWNAM_R
2400 result = getpwuid_r (uid, &p_str, buf, buflen,
2403 result = getpwnam_r (username_c, &p_str, buf, buflen,
2407 p = getpwuid_r (uid, &p_str, buf, buflen);
2409 p = getpwnam_r (username_c, &p_str, buf, buflen);
2413 if (result == ERANGE && buflen < 512 * 1024)
2423 if (result == 0 && p == &p_str)
2425 if (!fill_user_info_from_passwd (p, info, error))
2435 "User \"%s\" unknown or no memory to allocate password entry\n",
2436 username_c ? username_c :
"???");
2437 _dbus_verbose (
"User %s unknown\n", username_c ? username_c :
"???");
2450 p = getpwnam (username_c);
2454 if (!fill_user_info_from_passwd (p, info, error))
2462 "User \"%s\" unknown or no memory to allocate password entry\n",
2463 username_c ? username_c :
"???");
2464 _dbus_verbose (
"User %s unknown\n", username_c ? username_c :
"???");
2473 #ifdef HAVE_GETGROUPLIST
2478 int initial_buf_count;
2480 initial_buf_count = 17;
2481 buf_count = initial_buf_count;
2489 if (getgrouplist (username_c,
2491 buf, &buf_count) < 0)
2507 if (buf_count == initial_buf_count)
2522 if (getgrouplist (username_c, info->
primary_gid, buf, &buf_count) < 0)
2526 _dbus_warn (
"It appears that username \"%s\" is in more than %d groups.\nProceeding with just the first %d groups.",
2527 username_c, buf_count, buf_count);
2533 "Failed to get groups for username \"%s\" primary GID "
2536 _dbus_strerror (errno));
2551 for (i = 0; i < buf_count; ++i)
2574 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2579 _DBUS_ASSERT_ERROR_IS_SET (error);
2613 return fill_user_info (info, uid,
2631 _DBUS_STATIC_ASSERT (
sizeof (pid_t) <=
sizeof (
dbus_pid_t));
2632 _DBUS_STATIC_ASSERT (
sizeof (uid_t) <=
sizeof (
dbus_uid_t));
2633 _DBUS_STATIC_ASSERT (
sizeof (gid_t) <=
sizeof (
dbus_gid_t));
2715 if (_dbus_string_get_length (uid_str) == 0)
2717 _dbus_verbose (
"UID string was zero length\n");
2726 _dbus_verbose (
"could not parse string as a UID\n");
2730 if (end != _dbus_string_get_length (uid_str))
2732 _dbus_verbose (
"string contained trailing stuff after UID\n");
2747 static pthread_mutex_t atomic_mutex = PTHREAD_MUTEX_INITIALIZER;
2760 return __sync_add_and_fetch(&atomic->
value, 1)-1;
2764 pthread_mutex_lock (&atomic_mutex);
2765 res = atomic->
value;
2767 pthread_mutex_unlock (&atomic_mutex);
2783 return __sync_sub_and_fetch(&atomic->
value, 1)+1;
2787 pthread_mutex_lock (&atomic_mutex);
2788 res = atomic->
value;
2790 pthread_mutex_unlock (&atomic_mutex);
2807 __sync_synchronize ();
2808 return atomic->
value;
2812 pthread_mutex_lock (&atomic_mutex);
2813 res = atomic->
value;
2814 pthread_mutex_unlock (&atomic_mutex);
2831 int timeout_milliseconds)
2833 #if defined(HAVE_POLL) && !defined(BROKEN_POLL)
2835 if (timeout_milliseconds < -1)
2837 timeout_milliseconds = -1;
2842 timeout_milliseconds);
2845 fd_set read_set, write_set, err_set;
2851 FD_ZERO (&read_set);
2852 FD_ZERO (&write_set);
2855 for (i = 0; i < n_fds; i++)
2860 FD_SET (fdp->
fd, &read_set);
2863 FD_SET (fdp->
fd, &write_set);
2865 FD_SET (fdp->
fd, &err_set);
2867 max_fd = MAX (max_fd, fdp->
fd);
2870 tv.tv_sec = timeout_milliseconds / 1000;
2871 tv.tv_usec = (timeout_milliseconds % 1000) * 1000;
2873 ready = select (max_fd + 1, &read_set, &write_set, &err_set,
2874 timeout_milliseconds < 0 ?
NULL : &tv);
2878 for (i = 0; i < n_fds; i++)
2884 if (FD_ISSET (fdp->
fd, &read_set))
2887 if (FD_ISSET (fdp->
fd, &write_set))
2890 if (FD_ISSET (fdp->
fd, &err_set))
2910 #ifdef HAVE_MONOTONIC_CLOCK
2912 clock_gettime (CLOCK_MONOTONIC, &ts);
2915 *tv_sec = ts.tv_sec;
2917 *tv_usec = ts.tv_nsec / 1000;
2921 gettimeofday (&t,
NULL);
2926 *tv_usec = t.tv_usec;
2943 gettimeofday (&t,
NULL);
2948 *tv_usec = t.tv_usec;
2963 const char *filename_c;
2965 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2967 filename_c = _dbus_string_get_const_data (filename);
2969 if (mkdir (filename_c, 0700) < 0)
2971 if (errno == EEXIST)
2975 "Failed to create directory %s: %s\n",
2976 filename_c, _dbus_strerror (errno));
3000 if (_dbus_string_get_length (dir) == 0 ||
3001 _dbus_string_get_length (next_component) == 0)
3004 dir_ends_in_slash =
'/' == _dbus_string_get_byte (dir,
3005 _dbus_string_get_length (dir) - 1);
3007 file_starts_with_slash =
'/' == _dbus_string_get_byte (next_component, 0);
3009 if (dir_ends_in_slash && file_starts_with_slash)
3013 else if (!(dir_ends_in_slash || file_starts_with_slash))
3020 _dbus_string_get_length (dir));
3024 #define NANOSECONDS_PER_SECOND 1000000000
3026 #define MICROSECONDS_PER_SECOND 1000000
3028 #define MILLISECONDS_PER_SECOND 1000
3030 #define NANOSECONDS_PER_MILLISECOND 1000000
3032 #define MICROSECONDS_PER_MILLISECOND 1000
3041 #ifdef HAVE_NANOSLEEP
3042 struct timespec req;
3043 struct timespec rem;
3045 req.tv_sec = milliseconds / MILLISECONDS_PER_SECOND;
3046 req.tv_nsec = (milliseconds % MILLISECONDS_PER_SECOND) * NANOSECONDS_PER_MILLISECOND;
3050 while (nanosleep (&req, &rem) < 0 && errno == EINTR)
3052 #elif defined (HAVE_USLEEP)
3053 usleep (milliseconds * MICROSECONDS_PER_MILLISECOND);
3055 sleep (MAX (milliseconds / 1000, 1));
3077 old_len = _dbus_string_get_length (str);
3081 fd = open (
"/dev/urandom", O_RDONLY);
3086 "Could not open /dev/urandom: %s",
3087 _dbus_strerror (errno));
3091 _dbus_verbose (
"/dev/urandom fd %d opened\n", fd);
3095 if (result != n_bytes)
3099 "Could not read /dev/urandom: %s",
3100 _dbus_strerror (errno));
3103 "Short read from /dev/urandom");
3110 _dbus_verbose (
"Read %d bytes from /dev/urandom\n",
3138 _dbus_strerror (
int error_number)
3142 msg = strerror (error_number);
3155 signal (SIGPIPE, SIG_IGN);
3170 val = fcntl (fd, F_GETFD, 0);
3177 fcntl (fd, F_SETFD, val);
3191 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3200 "Could not close fd %d", fd);
3221 #ifdef F_DUPFD_CLOEXEC
3224 new_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
3225 cloexec_done = new_fd >= 0;
3227 if (new_fd < 0 && errno == EINVAL)
3230 new_fd = fcntl(fd, F_DUPFD, 3);
3236 "Could not duplicate fd %d", fd);
3240 #ifdef F_DUPFD_CLOEXEC
3261 return _dbus_set_fd_nonblocking (fd.fd, error);
3265 _dbus_set_fd_nonblocking (
int fd,
3270 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3272 val = fcntl (fd, F_GETFL, 0);
3276 "Failed to get flags from file descriptor %d: %s",
3277 fd, _dbus_strerror (errno));
3278 _dbus_verbose (
"Failed to get flags for fd %d: %s\n", fd,
3279 _dbus_strerror (errno));
3283 if (fcntl (fd, F_SETFL, val | O_NONBLOCK) < 0)
3286 "Failed to set nonblocking flag of file descriptor %d: %s",
3287 fd, _dbus_strerror (errno));
3288 _dbus_verbose (
"Failed to set fd %d nonblocking: %s\n",
3289 fd, _dbus_strerror (errno));
3305 #if defined (HAVE_BACKTRACE) && defined (DBUS_BUILT_R_DYNAMIC)
3311 bt_size = backtrace (bt, 500);
3313 syms = backtrace_symbols (bt, bt_size);
3319 fprintf (stderr,
" %s\n", syms[i]);
3325 #elif defined (HAVE_BACKTRACE) && ! defined (DBUS_BUILT_R_DYNAMIC)
3326 fprintf (stderr,
" D-Bus not built with -rdynamic so unable to print a backtrace\n");
3328 fprintf (stderr,
" D-Bus not compiled with backtrace support so unable to print a backtrace\n");
3350 #ifdef HAVE_SOCKETPAIR
3357 retval = socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0, fds);
3358 cloexec_done = retval >= 0;
3360 if (retval < 0 && (errno == EINVAL || errno == EPROTOTYPE))
3363 retval = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
3369 "Could not create full-duplex pipe");
3373 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3384 (!_dbus_set_fd_nonblocking (fds[0],
NULL) ||
3385 !_dbus_set_fd_nonblocking (fds[1],
NULL)))
3388 "Could not set full-duplex pipe nonblocking");
3399 _dbus_verbose (
"full-duplex pipe %d <-> %d\n",
3404 _dbus_warn (
"_dbus_socketpair() not implemented on this OS\n");
3406 "_dbus_socketpair() not implemented on this OS");
3423 char static_buf[1024];
3424 int bufsize =
sizeof (static_buf);
3428 DBUS_VA_COPY (args_copy, args);
3429 len = vsnprintf (static_buf, bufsize, format, args_copy);
3446 DBUS_VA_COPY (args_copy, args);
3448 if (vsnprintf (static_buf, 1, format, args_copy) == 1)
3467 DBUS_VA_COPY (args_copy, args);
3468 len = vsnprintf (buf, bufsize, format, args_copy);
3493 static const char* tmpdir =
NULL;
3505 tmpdir = getenv(
"TMPDIR");
3511 tmpdir = getenv(
"TMP");
3513 tmpdir = getenv(
"TEMP");
3527 #if defined(DBUS_ENABLE_X11_AUTOLAUNCH) || defined(DBUS_ENABLE_LAUNCHD)
3548 _read_subprocess_line_argv (
const char *progpath,
3554 int result_pipe[2] = { -1, -1 };
3555 int errors_pipe[2] = { -1, -1 };
3562 sigset_t new_set, old_set;
3564 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3571 sigemptyset (&new_set);
3572 sigaddset (&new_set, SIGCHLD);
3573 sigprocmask (SIG_BLOCK, &new_set, &old_set);
3575 orig_len = _dbus_string_get_length (result);
3579 if (pipe (result_pipe) < 0)
3582 "Failed to create a pipe to call %s: %s",
3583 progpath, _dbus_strerror (errno));
3584 _dbus_verbose (
"Failed to create a pipe to call %s: %s\n",
3585 progpath, _dbus_strerror (errno));
3588 if (pipe (errors_pipe) < 0)
3591 "Failed to create a pipe to call %s: %s",
3592 progpath, _dbus_strerror (errno));
3593 _dbus_verbose (
"Failed to create a pipe to call %s: %s\n",
3594 progpath, _dbus_strerror (errno));
3602 "Failed to fork() to call %s: %s",
3603 progpath, _dbus_strerror (errno));
3604 _dbus_verbose (
"Failed to fork() to call %s: %s\n",
3605 progpath, _dbus_strerror (errno));
3614 fd = open (
"/dev/null", O_RDWR);
3619 _dbus_verbose (
"/dev/null fd %d opened\n", fd);
3625 if (dup2 (fd, 0) == -1)
3627 if (dup2 (result_pipe[
WRITE_END], 1) == -1)
3629 if (dup2 (errors_pipe[WRITE_END], 2) == -1)
3634 sigprocmask (SIG_SETMASK, &old_set,
NULL);
3637 if (progpath[0] ==
'/')
3639 execv (progpath, argv);
3648 execvp (strrchr (progpath,
'/')+1, argv);
3651 execvp (progpath, argv);
3658 close (result_pipe[WRITE_END]);
3659 close (errors_pipe[WRITE_END]);
3673 ret = waitpid (pid, &status, 0);
3675 while (ret == -1 && errno == EINTR);
3679 if (!WIFEXITED (status) || WEXITSTATUS (status) != 0 )
3685 _DBUS_SET_OOM (error);
3697 if (_dbus_string_get_length (&error_message) > 0)
3699 "%s terminated abnormally with the following error: %s",
3700 progpath, _dbus_string_get_data (&error_message));
3703 "%s terminated abnormally without any error message",
3711 sigprocmask (SIG_SETMASK, &old_set,
NULL);
3714 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3716 _DBUS_ASSERT_ERROR_IS_SET (error);
3718 if (result_pipe[0] != -1)
3719 close (result_pipe[0]);
3720 if (result_pipe[1] != -1)
3721 close (result_pipe[1]);
3722 if (errors_pipe[0] != -1)
3723 close (errors_pipe[0]);
3724 if (errors_pipe[1] != -1)
3725 close (errors_pipe[1]);
3748 #ifdef DBUS_ENABLE_X11_AUTOLAUNCH
3752 const char *display;
3762 "Unable to autolaunch when setuid");
3766 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3779 if (display ==
NULL || display[0] ==
'\0')
3782 "Unable to autolaunch a dbus-daemon without a $DISPLAY for X11");
3788 _DBUS_SET_OOM (error);
3797 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
3799 progpath = TEST_BUS_LAUNCH_BINARY;
3802 progpath = DBUS_BINDIR
"/dbus-launch";
3809 argv[i] =
"dbus-launch";
3811 argv[i] =
"--autolaunch";
3813 argv[i] = _dbus_string_get_data (&uuid);
3815 argv[i] =
"--binary-syntax";
3817 argv[i] =
"--close-stderr";
3824 retval = _read_subprocess_line_argv (progpath,
3826 argv, address, error);
3833 "Using X11 for dbus-daemon autolaunch was disabled at compile time, "
3834 "set your DBUS_SESSION_BUS_ADDRESS instead");
3887 if (!create_if_not_found)
3909 const char *launchd_env_var,
3912 #ifdef DBUS_ENABLE_LAUNCHD
3916 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3921 "Unable to find launchd socket when setuid");
3926 argv[i] =
"launchctl";
3930 argv[i] = (
char*)launchd_env_var;
3937 if (!_read_subprocess_line_argv(argv[0],
TRUE, argv, socket_path, error))
3943 if (_dbus_string_get_length(socket_path) == 0)
3953 "can't lookup socket from launchd; launchd support not compiled in");
3958 #ifdef DBUS_ENABLE_LAUNCHD
3968 "Unable to find launchd socket when setuid");
3974 _DBUS_SET_OOM (error);
3989 "launchd did not provide a socket path, "
3990 "verify that org.freedesktop.dbus-session.plist is loaded!");
3996 _DBUS_SET_OOM (error);
4001 _dbus_string_get_length (address)))
4003 _DBUS_SET_OOM (error);
4018 const char *runtime_dir =
_dbus_getenv (
"XDG_RUNTIME_DIR");
4023 if (runtime_dir ==
NULL)
4025 _dbus_verbose (
"XDG_RUNTIME_DIR not found in environment");
4032 _DBUS_SET_OOM (error);
4038 _DBUS_SET_OOM (error);
4042 if (lstat (_dbus_string_get_const_data (&user_bus_path), &stbuf) == -1)
4044 _dbus_verbose (
"XDG_RUNTIME_DIR/bus not available: %s",
4045 _dbus_strerror (errno));
4051 if (stbuf.st_uid != getuid ())
4053 _dbus_verbose (
"XDG_RUNTIME_DIR/bus owned by uid %ld, not our uid %ld",
4054 (
long) stbuf.st_uid, (
long) getuid ());
4060 if ((stbuf.st_mode & S_IFMT) != S_IFSOCK)
4062 _dbus_verbose (
"XDG_RUNTIME_DIR/bus is not a socket: st_mode = 0o%lo",
4063 (
long) stbuf.st_mode);
4072 _DBUS_SET_OOM (error);
4108 #ifdef DBUS_ENABLE_LAUNCHD
4110 return _dbus_lookup_session_address_launchd (address, error);
4114 if (!_dbus_lookup_user_bus (supported, address, error))
4116 else if (*supported)
4174 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
4176 const char *
override;
4179 if (
override !=
NULL && *
override !=
'\0')
4185 _dbus_verbose (
"Using fake homedir for testing: %s\n",
4186 _dbus_string_get_const_data (&homedir));
4193 if (!already_warned)
4195 _dbus_warn (
"Using your real home directory for testing, set DBUS_TEST_HOMEDIR to avoid\n");
4196 already_warned =
TRUE;
4208 directory, _dbus_string_get_length (directory))) {
4222 _dbus_daemon_publish_session_bus_address (
const char* addr,
4230 _dbus_daemon_unpublish_session_bus_address (
void)
4244 return e == EAGAIN || e == EWOULDBLOCK;
4258 const char *filename_c;
4260 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
4262 filename_c = _dbus_string_get_const_data (filename);
4264 if (rmdir (filename_c) != 0)
4267 "Failed to remove directory %s: %s\n",
4268 filename_c, _dbus_strerror (errno));
4288 struct sockaddr_storage storage;
4289 struct sockaddr_un un;
4292 socklen_t sa_len =
sizeof(sa_buf);
4296 if (getsockname(fd.fd, &sa_buf.sa, &sa_len) < 0)
4299 return sa_buf.sa.sa_family == AF_UNIX;
4322 d = opendir (
"/proc/self/fd");
4327 struct dirent buf, *de;
4332 k = readdir_r (d, &buf, &de);
4336 if (de->d_name[0] ==
'.')
4340 l = strtol (de->d_name, &e, 10);
4341 if (errno != 0 || e ==
NULL || *e !=
'\0')
4348 if (fd == dirfd (d))
4359 maxfds = sysconf (_SC_OPEN_MAX);
4368 for (i = 3; i < maxfds; i++)
4387 #if 0 && defined(HAVE_LIBC_ENABLE_SECURE)
4390 extern int __libc_enable_secure;
4391 return __libc_enable_secure;
4393 #elif defined(HAVE_ISSETUGID)
4395 return issetugid ();
4397 uid_t ruid, euid, suid;
4398 gid_t rgid, egid, sgid;
4405 if (_DBUS_UNLIKELY (!check_setuid_initialised))
4407 #ifdef HAVE_GETRESUID
4408 if (getresuid (&ruid, &euid, &suid) != 0 ||
4409 getresgid (&rgid, &egid, &sgid) != 0)
4412 suid = ruid = getuid ();
4413 sgid = rgid = getgid ();
4418 check_setuid_initialised =
TRUE;
4419 is_setuid = (ruid != euid || ruid != suid ||
4420 rgid != egid || rgid != sgid);
4441 struct sockaddr_storage storage;
4442 struct sockaddr_un un;
4443 struct sockaddr_in ipv4;
4444 struct sockaddr_in6 ipv6;
4446 char hostip[INET6_ADDRSTRLEN];
4447 int size =
sizeof (socket);
4450 if (getsockname (fd.fd, &socket.sa, &size))
4453 switch (socket.sa.sa_family)
4456 if (socket.un.sun_path[0]==
'\0')
4472 if (inet_ntop (AF_INET, &socket.ipv4.sin_addr, hostip, sizeof (hostip)))
4474 hostip, ntohs (socket.ipv4.sin_port)))
4480 if (inet_ntop (AF_INET6, &socket.ipv6.sin6_addr, hostip, sizeof (hostip)))
4482 ntohs (socket.ipv6.sin6_port)) &&
4490 "Failed to read address from socket: Unknown socket type.");
4496 "Failed to open socket: %s",
4497 _dbus_strerror (errno));
4502 _dbus_save_socket_errno (
void)
4508 _dbus_restore_socket_errno (
int saved_errno)
4510 errno = saved_errno;
dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString.
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_parse_int(const DBusString *str, int start, long *value_return, int *end_return)
Parses an integer contained in a DBusString.
An atomic integer safe to increment or decrement from multiple threads.
dbus_uid_t _dbus_credentials_get_unix_uid(DBusCredentials *credentials)
Gets the UNIX user ID in the credentials, or DBUS_UID_UNSET if the credentials object doesn't contain...
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_append_uint(DBusString *str, unsigned long value)
Appends an unsigned integer to a DBusString.
#define NULL
A null pointer, defined appropriately for C or C++.
#define DBUS_ERROR_SPAWN_EXEC_FAILED
While starting a new process, the exec() call failed.
volatile dbus_int32_t value
Value of the atomic integer.
dbus_bool_t _dbus_check_dir_is_private_to_user(DBusString *dir, DBusError *error)
Checks to make sure the given directory is private to the user.
void _dbus_close_all(void)
Closes all file descriptors except the first three (i.e.
void * dbus_realloc(void *memory, size_t bytes)
Resizes a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
dbus_bool_t _dbus_string_lengthen(DBusString *str, int additional_length)
Makes a string longer by the given number of bytes.
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
dbus_bool_t _dbus_socketpair(DBusSocket *fd1, DBusSocket *fd2, dbus_bool_t blocking, DBusError *error)
Creates pair of connect sockets (as in socketpair()).
int _dbus_write(int fd, const DBusString *buffer, int start, int len)
Thin wrapper around the write() system call that writes a part of a DBusString and handles EINTR for ...
dbus_bool_t _dbus_ensure_standard_fds(DBusEnsureStandardFdsFlags flags, const char **error_str_p)
Ensure that the standard file descriptors stdin, stdout and stderr are open, by opening /dev/null if ...
#define DBUS_ERROR_NOT_SUPPORTED
Requested operation isn't supported (like ENOSYS on UNIX).
#define dbus_new(type, count)
Safe macro for using dbus_malloc().
#define DBUS_GID_FORMAT
an appropriate printf format for dbus_gid_t
#define DBUS_PID_FORMAT
an appropriate printf format for dbus_pid_t
dbus_bool_t _dbus_generate_uuid(DBusGUID *uuid, DBusError *error)
Generates a new UUID.
dbus_bool_t _dbus_get_local_machine_uuid_encoded(DBusString *uuid_str, DBusError *error)
Gets the hex-encoded UUID of the machine this function is executed on.
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
dbus_bool_t _dbus_append_address_from_socket(DBusSocket fd, DBusString *address, DBusError *error)
Read the address from the socket and append it to the string.
dbus_bool_t _dbus_check_setuid(void)
NOTE: If you modify this function, please also consider making the corresponding change in GLib...
void _dbus_user_database_flush_system(void)
Flushes the system global user database;.
void dbus_error_free(DBusError *error)
Frees an error that's been set (or just initialized), then reinitializes the error as in dbus_error_i...
dbus_gid_t primary_gid
GID.
dbus_bool_t _dbus_credentials_add_linux_security_label(DBusCredentials *credentials, const char *label)
Add a Linux security label, as used by LSMs such as SELinux, Smack and AppArmor, to the credentials...
A globally unique ID ; we have one for each DBusServer, and also one for each machine with libdbus in...
dbus_pid_t _dbus_getpid(void)
Gets our process ID.
#define _DBUS_POLLIN
There is data to read.
dbus_bool_t _dbus_concat_dir_and_file(DBusString *dir, const DBusString *next_component)
Appends the given filename to the given directory.
char * _dbus_string_get_data_len(DBusString *str, int start, int len)
Gets a sub-portion of the raw character buffer from the string.
int _dbus_read_socket(DBusSocket fd, DBusString *buffer, int count)
Like _dbus_read(), but only works on sockets so is available on Windows.
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
#define DBUS_ERROR_IO_ERROR
Something went wrong reading or writing to a socket, for example.
int _dbus_dup(int fd, DBusError *error)
Duplicates a file descriptor.
void _dbus_string_shorten(DBusString *str, int length_to_remove)
Makes a string shorter by the given number of bytes.
short events
Events to poll for.
dbus_bool_t _dbus_string_copy(const DBusString *source, int start, DBusString *dest, int insert_at)
Like _dbus_string_move(), but does not delete the section of the source string that's copied to the d...
#define DBUS_PID_UNSET
an invalid PID used to represent an uninitialized dbus_pid_t field
dbus_bool_t _dbus_send_credentials_socket(DBusSocket server_fd, DBusError *error)
Sends a single nul byte with our UNIX credentials as ancillary data.
dbus_bool_t _dbus_close_socket(DBusSocket fd, DBusError *error)
Closes a socket.
void _dbus_credentials_clear(DBusCredentials *credentials)
Clear all credentials in the object.
#define DBUS_UID_UNSET
an invalid UID used to represent an uninitialized dbus_uid_t field
dbus_bool_t _dbus_parse_uid(const DBusString *uid_str, dbus_uid_t *uid)
Gets a UID from a UID string.
dbus_bool_t _dbus_get_autolaunch_address(const char *scope, DBusString *address, DBusError *error)
Returns the address of a new session bus.
const char * _dbus_error_from_errno(int error_number)
Converts a UNIX errno, or Windows errno or WinSock error value into a DBusError name.
dbus_bool_t _dbus_user_info_fill(DBusUserInfo *info, const DBusString *username, DBusError *error)
Gets user info for the given username.
dbus_bool_t _dbus_homedir_from_uid(dbus_uid_t uid, DBusString *homedir)
Gets the home directory for the given user.
unsigned long dbus_pid_t
A process ID.
int _dbus_read_socket_with_unix_fds(DBusSocket fd, DBusString *buffer, int count, int *fds, int *n_fds)
Like _dbus_read_socket() but also tries to read unix fds from the socket.
dbus_gid_t * group_ids
Groups IDs, including above primary group.
dbus_bool_t _dbus_lookup_launchd_socket(DBusString *socket_path, const char *launchd_env_var, DBusError *error)
quries launchd for a specific env var which holds the socket path.
void * dbus_malloc(size_t bytes)
Allocates the given number of bytes, as with standard malloc().
dbus_bool_t _dbus_append_user_from_current_process(DBusString *str)
Append to the string the identity we would like to have when we authenticate, on UNIX this is the cur...
dbus_bool_t _dbus_credentials_are_anonymous(DBusCredentials *credentials)
Checks whether a credentials object contains a user identity.
dbus_bool_t _dbus_get_is_errno_eagain_or_ewouldblock(int e)
See if errno is EAGAIN or EWOULDBLOCK (this has to be done differently for Winsock so is abstracted) ...
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string.
int n_group_ids
Size of group IDs array.
int _dbus_listen_systemd_sockets(DBusSocket **fds, DBusError *error)
Acquires one or more sockets passed in from systemd.
#define _DBUS_POLLOUT
Writing now will not block.
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
int _dbus_write_socket_two(DBusSocket fd, const DBusString *buffer1, int start1, int len1, const DBusString *buffer2, int start2, int len2)
Like _dbus_write_two() but only works on sockets and is thus available on Windows.
DBusSocket _dbus_accept(DBusSocket listen_fd)
Accepts a connection on a listening socket.
dbus_bool_t _dbus_string_init_preallocated(DBusString *str, int allocate_size)
Initializes a string that can be up to the given allocation size before it has to realloc...
dbus_int32_t _dbus_atomic_inc(DBusAtomic *atomic)
Atomically increments an integer.
int _dbus_read(int fd, DBusString *buffer, int count)
Thin wrapper around the read() system call that appends the data it reads to the DBusString buffer...
dbus_bool_t _dbus_string_append_printf(DBusString *str, const char *format,...)
Appends a printf-style formatted string to the DBusString.
dbus_bool_t _dbus_append_keyring_directory_for_credentials(DBusString *directory, DBusCredentials *credentials)
Appends the directory in which a keyring for the given credentials should be stored.
dbus_bool_t _dbus_read_credentials_socket(DBusSocket client_fd, DBusCredentials *credentials, DBusError *error)
Reads a single byte which must be nul (an error occurs otherwise), and reads unix credentials if avai...
dbus_bool_t _dbus_create_directory(const DBusString *filename, DBusError *error)
Creates a directory; succeeds if the directory is created or already existed.
dbus_bool_t _dbus_delete_directory(const DBusString *filename, DBusError *error)
Removes a directory; Directory must be empty.
Object representing an exception.
dbus_bool_t _dbus_address_append_escaped(DBusString *escaped, const DBusString *unescaped)
Appends an escaped version of one string to another string, using the D-Bus address escaping mechanis...
void _dbus_get_monotonic_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
int _dbus_listen_tcp_socket(const char *host, const char *port, const char *family, DBusString *retport, DBusSocket **fds_p, DBusError *error)
Creates a socket and binds it to the given path, then listens on the socket.
void _dbus_disable_sigpipe(void)
signal (SIGPIPE, SIG_IGN);
#define DBUS_ERROR_BAD_ADDRESS
A D-Bus bus address was malformed.
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError.
dbus_bool_t _dbus_credentials_add_adt_audit_data(DBusCredentials *credentials, void *audit_data, dbus_int32_t size)
Add ADT audit data to the credentials.
#define _DBUS_N_ELEMENTS(array)
Computes the number of elements in a fixed-size array using sizeof().
void _dbus_flush_caches(void)
Called when the bus daemon is signaled to reload its configuration; any caches should be nuked...
int _dbus_connect_exec(const char *path, char *const argv[], DBusError *error)
Creates a UNIX domain socket and connects it to the specified process to execute. ...
const char * _dbus_get_tmpdir(void)
Gets the temporary files directory by inspecting the environment variables TMPDIR, TMP, and TEMP in that order.
dbus_bool_t _dbus_string_append_byte(DBusString *str, unsigned char byte)
Appends a single byte to the string, returning FALSE if not enough memory.
#define _DBUS_UNLOCK(name)
Unlocks a global lock.
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
#define DBUS_GID_UNSET
an invalid GID used to represent an uninitialized dbus_gid_t field
dbus_uid_t _dbus_geteuid(void)
Gets our effective UID.
dbus_bool_t _dbus_credentials_add_from_current_process(DBusCredentials *credentials)
Adds the credentials of the current process to the passed-in credentials object.
#define TRUE
Expands to "1".
DBusPollable fd
File descriptor.
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
dbus_bool_t _dbus_credentials_add_pid(DBusCredentials *credentials, dbus_pid_t pid)
Add a UNIX process ID to the credentials.
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more.
#define READ_END
Helps remember which end of the pipe is which.
#define DBUS_UID_FORMAT
an appropriate printf format for dbus_uid_t
dbus_bool_t _dbus_read_uuid_file(const DBusString *filename, DBusGUID *uuid, dbus_bool_t create_if_not_found, DBusError *error)
Reads (and optionally writes) a uuid to a file.
char * homedir
Home directory.
void _dbus_exit(int code)
Exit the process, returning the given value.
unsigned long _dbus_pid_for_log(void)
The only reason this is separate from _dbus_getpid() is to allow it on Windows for logging but not fo...
void _dbus_fd_set_close_on_exec(int fd)
Sets the file descriptor to be close on exec.
DBusSocket _dbus_connect_tcp_socket(const char *host, const char *port, const char *family, DBusError *error)
Creates a socket and connects to a socket at the given host and port.
dbus_int32_t _dbus_atomic_dec(DBusAtomic *atomic)
Atomically decrement an integer.
dbus_uid_t _dbus_getuid(void)
Gets our UID.
dbus_bool_t _dbus_generate_random_bytes(DBusString *str, int n_bytes, DBusError *error)
Generates the given number of securely random bytes, using the best mechanism we can come up with...
dbus_bool_t _dbus_user_info_fill_uid(DBusUserInfo *info, dbus_uid_t uid, DBusError *error)
Gets user info for the given user ID.
dbus_bool_t _dbus_set_socket_nonblocking(DBusSocket fd, DBusError *error)
Sets a file descriptor to be nonblocking.
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
dbus_bool_t _dbus_lookup_session_address(dbus_bool_t *supported, DBusString *address, DBusError *error)
Determines the address of the session bus by querying a platform-specific method. ...
dbus_bool_t _dbus_close(int fd, DBusError *error)
Closes a file descriptor.
#define FALSE
Expands to "0".
dbus_bool_t _dbus_read_local_machine_uuid(DBusGUID *machine_id, dbus_bool_t create_if_not_found, DBusError *error)
Reads the uuid of the machine we're running on from the dbus configuration.
dbus_bool_t _dbus_write_uuid_file(const DBusString *filename, const DBusGUID *uuid, DBusError *error)
Write the give UUID to a file.
void _dbus_print_backtrace(void)
On GNU libc systems, print a crude backtrace to stderr.
void dbus_set_error_const(DBusError *error, const char *name, const char *message)
Assigns an error name and message to a DBusError.
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string.
#define _DBUS_LOCK(name)
Locks a global lock, initializing it first if necessary.
int _dbus_write_socket(DBusSocket fd, const DBusString *buffer, int start, int len)
Like _dbus_write(), but only supports sockets and is thus available on Windows.
int _dbus_write_two(int fd, const DBusString *buffer1, int start1, int len1, const DBusString *buffer2, int start2, int len2)
Like _dbus_write() but will use writev() if possible to write both buffers in sequence.
dbus_int32_t _dbus_atomic_get(DBusAtomic *atomic)
Atomically get the value of an integer.
void _dbus_sleep_milliseconds(int milliseconds)
Sleeps the given number of milliseconds.
DBUS_PRIVATE_EXPORT void _dbus_verbose_bytes_of_string(const DBusString *str, int start, int len)
Dump the given part of the string to verbose log.
#define WRITE_END
Helps remember which end of the pipe is which.
unsigned long dbus_gid_t
A group ID.
int _dbus_printf_string_upper_bound(const char *format, va_list args)
Measure the length of the given format string and arguments, not including the terminating nul...
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.