free(b->auth_uid);
free(b->address);
+ close_many(b->fds, b->n_fds);
+ free(b->fds);
+
for (i = 0; i < b->rqueue_size; i++)
sd_bus_message_unref(b->rqueue[i]);
free(b->rqueue);
free(b);
}
-static sd_bus* bus_new(void) {
+int sd_bus_new(sd_bus **ret) {
sd_bus *r;
+ if (!ret)
+ return -EINVAL;
+
r = new0(sd_bus, 1);
if (!r)
- return NULL;
+ return -ENOMEM;
r->n_ref = 1;
r->fd = -1;
r->message_version = 1;
+ r->negotiate_fds = true;
/* We guarantee that wqueue always has space for at least one
* entry */
r->wqueue = new(sd_bus_message*, 1);
if (!r->wqueue) {
free(r);
- return NULL;
+ return -ENOMEM;
}
- return r;
-};
+ *ret = r;
+ return 0;
+}
+
+int sd_bus_set_address(sd_bus *bus, const char *address) {
+ char *a;
+
+ if (!bus)
+ return -EINVAL;
+ if (bus->state != BUS_UNSET)
+ return -EPERM;
+ if (!address)
+ return -EINVAL;
+
+ a = strdup(address);
+ if (!a)
+ return -ENOMEM;
+
+ free(bus->address);
+ bus->address = a;
+
+ return 0;
+}
+
+int sd_bus_set_fd(sd_bus *bus, int fd) {
+ if (!bus)
+ return -EINVAL;
+ if (bus->state != BUS_UNSET)
+ return -EPERM;
+ if (fd < 0)
+ return -EINVAL;
+
+ bus->fd = fd;
+ return 0;
+}
+
+int sd_bus_set_hello(sd_bus *bus, int b) {
+ if (!bus)
+ return -EINVAL;
+ if (bus->state != BUS_UNSET)
+ return -EPERM;
+
+ bus->send_hello = !!b;
+ return 0;
+}
+
+int sd_bus_set_negotiate_fds(sd_bus *bus, int b) {
+ if (!bus)
+ return -EINVAL;
+ if (bus->state != BUS_UNSET)
+ return -EPERM;
+
+ bus->negotiate_fds = !!b;
+ return 0;
+}
static int hello_callback(sd_bus *bus, int error, sd_bus_message *reply, void *userdata) {
const char *s;
int r;
assert(bus);
+ assert(bus->state == BUS_HELLO);
if (error != 0)
return -error;
assert(bus);
+ if (!bus->send_hello)
+ return 0;
+
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.DBus",
if (r < 0)
return r;
- bus->sent_hello = true;
return r;
}
static int bus_start_running(sd_bus *bus) {
assert(bus);
- if (bus->sent_hello) {
+ if (bus->send_hello) {
bus->state = BUS_HELLO;
return 1;
}
}
static int bus_auth_verify(sd_bus *b) {
- char *e, *f;
+ char *e, *f, *start;
sd_id128_t peer;
unsigned i;
int r;
- /* We expect two response lines: "OK", "AGREE_UNIX_FD", and
- * that's it */
+ /* We expect two response lines: "OK" and possibly
+ * "AGREE_UNIX_FD" */
e = memmem(b->rbuffer, b->rbuffer_size, "\r\n", 2);
if (!e)
return 0;
- f = memmem(e + 2, b->rbuffer_size - (e - (char*) b->rbuffer) - 2, "\r\n", 2);
- if (!f)
- return 0;
+ if (b->negotiate_fds) {
+ f = memmem(e + 2, b->rbuffer_size - (e - (char*) b->rbuffer) - 2, "\r\n", 2);
+ if (!f)
+ return 0;
+
+ start = f + 2;
+ } else {
+ f = NULL;
+ start = e + 2;
+ }
+
+ /* Nice! We got all the lines we need. First check the OK
+ * line */
if (e - (char*) b->rbuffer != 3 + 32)
return -EPERM;
b->peer = peer;
- b->can_fds =
- (f - e == sizeof("\r\nAGREE_UNIX_FD") - 1) &&
- memcmp(e + 2, "AGREE_UNIX_FD", sizeof("AGREE_UNIX_FD") - 1) == 0;
+ /* And possibly check the second line, too */
+
+ if (f)
+ b->can_fds =
+ (f - e == sizeof("\r\nAGREE_UNIX_FD") - 1) &&
+ memcmp(e + 2, "AGREE_UNIX_FD", sizeof("AGREE_UNIX_FD") - 1) == 0;
- b->rbuffer_size -= (f + 2 - (char*) b->rbuffer);
- memmove(b->rbuffer, f + 2, b->rbuffer_size);
+ b->rbuffer_size -= (start - (char*) b->rbuffer);
+ memmove(b->rbuffer, start, b->rbuffer_size);
r = bus_start_running(b);
if (r < 0)
k = recvmsg(b->fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL);
if (k < 0)
return errno == EAGAIN ? 0 : -errno;
+ if (k == 0)
+ return -ECONNRESET;
b->rbuffer_size += k;
static int bus_start_auth(sd_bus *b) {
static const char auth_prefix[] = "\0AUTH EXTERNAL ";
- static const char auth_suffix[] = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
+ static const char auth_suffix_with_unix_fd[] = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
+ static const char auth_suffix_without_unix_fd[] = "\r\nBEGIN\r\n";
char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
size_t l;
+ const char *auth_suffix;
assert(b);
if (!b->auth_uid)
return -ENOMEM;
+ auth_suffix = b->negotiate_fds ? auth_suffix_with_unix_fd : auth_suffix_without_unix_fd;
+
b->auth_iovec[0].iov_base = (void*) auth_prefix;
b->auth_iovec[0].iov_len = sizeof(auth_prefix) -1;
b->auth_iovec[1].iov_base = (void*) b->auth_uid;
b->auth_iovec[1].iov_len = l * 2;
b->auth_iovec[2].iov_base = (void*) auth_suffix;
- b->auth_iovec[2].iov_len = sizeof(auth_suffix) -1;
+ b->auth_iovec[2].iov_len = strlen(auth_suffix);
b->auth_size = sizeof(auth_prefix) - 1 + l * 2 + sizeof(auth_suffix) - 1;
return bus_write_auth(b);
}
}
+static int bus_start_fd(sd_bus *b) {
+ int r;
+
+ assert(b);
+
+ r = fd_nonblock(b->fd, true);
+ if (r < 0)
+ return r;
+
+ r = fd_cloexec(b->fd, true);
+ if (r < 0)
+ return r;
+
+ r = bus_setup_fd(b);
+ if (r < 0)
+ return r;
+
+ return bus_start_auth(b);
+}
+
+int sd_bus_start(sd_bus *bus) {
+ int r;
+
+ if (!bus)
+ return -EINVAL;
+ if (bus->state != BUS_UNSET)
+ return -EPERM;
+
+ bus->state = BUS_OPENING;
+
+ if (bus->fd >= 0)
+ r = bus_start_fd(bus);
+ else if (bus->address)
+ r = bus_start_connect(bus);
+ else
+ return -EINVAL;
+
+ if (r < 0)
+ return r;
+
+ return bus_send_hello(bus);
+}
+
int sd_bus_open_system(sd_bus **ret) {
const char *e;
sd_bus *b;
if (!ret)
return -EINVAL;
+ r = sd_bus_new(&b);
+ if (r < 0)
+ return r;
+
e = getenv("DBUS_SYSTEM_BUS_ADDRESS");
if (e) {
- r = sd_bus_open_address(e, &b);
+ r = sd_bus_set_address(b, e);
if (r < 0)
- return r;
+ goto fail;
} else {
- b = bus_new();
- if (!b)
- return -ENOMEM;
-
b->sockaddr.un.sun_family = AF_UNIX;
strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1;
-
- r = bus_start_connect(b);
- if (r < 0) {
- bus_free(b);
- return r;
- }
}
- r = bus_send_hello(b);
- if (r < 0) {
- sd_bus_unref(b);
- return r;
- }
+ b->send_hello = true;
+
+ r = sd_bus_start(b);
+ if (r < 0)
+ goto fail;
*ret = b;
return 0;
+
+fail:
+ bus_free(b);
+ return r;
}
int sd_bus_open_user(sd_bus **ret) {
if (!ret)
return -EINVAL;
+ r = sd_bus_new(&b);
+ if (r < 0)
+ return r;
+
e = getenv("DBUS_SESSION_BUS_ADDRESS");
if (e) {
- r = sd_bus_open_address(e, &b);
+ r = sd_bus_set_address(b, e);
if (r < 0)
- return r;
+ goto fail;
} else {
e = getenv("XDG_RUNTIME_DIR");
- if (!e)
- return -ENOENT;
+ if (!e) {
+ r = -ENOENT;
+ goto fail;
+ }
l = strlen(e);
- if (l + 4 > sizeof(b->sockaddr.un.sun_path))
- return -E2BIG;
-
- b = bus_new();
- if (!b)
- return -ENOMEM;
+ if (l + 4 > sizeof(b->sockaddr.un.sun_path)) {
+ r = -E2BIG;
+ goto fail;
+ }
b->sockaddr.un.sun_family = AF_UNIX;
memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4);
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4;
-
- r = bus_start_connect(b);
- if (r < 0) {
- bus_free(b);
- return r;
- }
- }
-
- r = bus_send_hello(b);
- if (r < 0) {
- sd_bus_unref(b);
- return r;
}
- *ret = b;
- return 0;
-}
-
-int sd_bus_open_address(const char *address, sd_bus **ret) {
- sd_bus *b;
- int r;
+ b->send_hello = true;
- if (!address)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
-
- b = bus_new();
- if (!b)
- return -ENOMEM;
-
- b->address = strdup(address);
- if (!b->address) {
- bus_free(b);
- return -ENOMEM;
- }
-
- r = bus_start_connect(b);
- if (r < 0) {
- bus_free(b);
- return r;
- }
-
- *ret = b;
- return 0;
-}
-
-int sd_bus_open_fd(int fd, sd_bus **ret) {
- sd_bus *b;
- int r;
-
- if (fd < 0)
- return -EINVAL;
- if (!ret)
- return -EINVAL;
-
- b = bus_new();
- if (!b)
- return -ENOMEM;
-
- b->fd = fd;
-
- r = fd_nonblock(b->fd, true);
- if (r < 0)
- goto fail;
-
- fd_cloexec(b->fd, true);
- if (r < 0)
- goto fail;
-
- r = bus_setup_fd(b);
- if (r < 0)
- goto fail;
-
- r = bus_start_auth(b);
+ r = sd_bus_start(b);
if (r < 0)
goto fail;
return 0;
fail:
- bus_free(b);
+ bus_free(b);
return r;
}
if (!bus)
return -EINVAL;
- return bus->fd >= 0;
+ return bus->state != BUS_UNSET && bus->fd >= 0;
}
int sd_bus_can_send(sd_bus *bus, char type) {
if (!bus)
return -EINVAL;
+ if (bus->fd < 0)
+ return -ENOTCONN;
if (type == SD_BUS_TYPE_UNIX_FD) {
+ if (!bus->negotiate_fds)
+ return 0;
+
r = bus_ensure_running(bus);
if (r < 0)
return r;
if (*idx >= m->size)
return 0;
+ zero(mh);
+
+ if (m->n_fds > 0) {
+ struct cmsghdr *control;
+ control = alloca(CMSG_SPACE(sizeof(int) * m->n_fds));
+
+ mh.msg_control = control;
+ control->cmsg_level = SOL_SOCKET;
+ control->cmsg_type = SCM_RIGHTS;
+ mh.msg_controllen = control->cmsg_len = CMSG_LEN(sizeof(int) * m->n_fds);
+ memcpy(CMSG_DATA(control), m->fds, sizeof(int) * m->n_fds);
+ }
n = m->n_iovec * sizeof(struct iovec);
iov = alloca(n);
j = 0;
iovec_advance(iov, &j, *idx);
- zero(mh);
mh.msg_iov = iov;
mh.msg_iovlen = m->n_iovec;
static int message_make(sd_bus *bus, size_t size, sd_bus_message **m) {
sd_bus_message *t;
- void *b = NULL;
+ void *b;
int r;
assert(bus);
bus->rbuffer_size - size);
if (!b)
return -ENOMEM;
- }
+ } else
+ b = NULL;
r = bus_message_from_malloc(bus->rbuffer, size,
+ bus->fds, bus->n_fds,
bus->ucred_valid ? &bus->ucred : NULL,
- bus->label[0] ? bus->label : NULL, &t);
+ bus->label[0] ? bus->label : NULL,
+ &t);
if (r < 0) {
free(b);
return r;
bus->rbuffer = b;
bus->rbuffer_size -= size;
+ bus->fds = NULL;
+ bus->n_fds = 0;
+
*m = t;
return 1;
}
void *b;
union {
struct cmsghdr cmsghdr;
- uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
+ uint8_t buf[CMSG_SPACE(sizeof(int) * BUS_FDS_MAX) +
+ CMSG_SPACE(sizeof(struct ucred)) +
CMSG_SPACE(NAME_MAX)]; /*selinux label */
} control;
struct cmsghdr *cmsg;
k = recvmsg(bus->fd, &mh, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_CMSG_CLOEXEC);
if (k < 0)
return errno == EAGAIN ? 0 : -errno;
+ if (k == 0)
+ return -ECONNRESET;
bus->rbuffer_size += k;
- bus->ucred_valid = false;
- bus->label[0] = 0;
for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
if (cmsg->cmsg_level == SOL_SOCKET &&
+ cmsg->cmsg_type == SCM_RIGHTS) {
+ int n, *f;
+
+ n = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
+
+ f = realloc(bus->fds, sizeof(int) + (bus->n_fds + n));
+ if (!f) {
+ close_many((int*) CMSG_DATA(cmsg), n);
+ return -ENOMEM;
+ }
+
+ memcpy(f + bus->n_fds, CMSG_DATA(cmsg), n * sizeof(int));
+ bus->fds = f;
+ bus->n_fds += n;
+ } else if (cmsg->cmsg_level == SOL_SOCKET &&
cmsg->cmsg_type == SCM_CREDENTIALS &&
cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
if (!bus)
return -EINVAL;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
if (bus->fd < 0)
return -ENOTCONN;
if (!m)
return -EINVAL;
+ if (m->n_fds > 0) {
+ r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -ENOTSUP;
+ }
+
/* If the serial number isn't kept, then we know that no reply
* is expected */
if (!serial && !m->sealed)
if (!bus)
return -EINVAL;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
if (bus->fd < 0)
return -ENOTCONN;
if (!m)
assert(bus);
+ if (bus->fd < 0)
+ return -ENOTCONN;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
+
if (bus->state == BUS_RUNNING)
return 1;
return -EINVAL;
if (bus->fd < 0)
return -ENOTCONN;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
if (!m)
return -EINVAL;
if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
if (!bus)
return -EINVAL;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
if (bus->fd < 0)
return -ENOTCONN;
return -EINVAL;
if (!timeout_usec)
return -EINVAL;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
if (bus->fd < 0)
return -ENOTCONN;
if (!bus)
return -EINVAL;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
if (bus->fd < 0)
return -ENOTCONN;
if (!bus)
return -EINVAL;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
if (bus->fd < 0)
return -ENOTCONN;
if (bus->rqueue_size > 0)
if (!bus)
return -EINVAL;
+ if (bus->state == BUS_UNSET)
+ return -ENOTCONN;
if (bus->fd < 0)
return -ENOTCONN;
~ianmdlvl / elogind.git / blobdiff