X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flibsystemd-bus%2Fbus-control.c;h=43e2848ecc60b0e3f532445da5d7316d8025f8cb;hp=a0abccf1ddbbcda484c3e0107d27c9db950c2763;hb=5b12334d35eadf1f45cc3d631fd1a2e72ffaea0a;hpb=d4100e2444fc78156a205bbb05703b31063e1248
diff --git a/src/libsystemd-bus/bus-control.c b/src/libsystemd-bus/bus-control.c
index a0abccf1d..43e2848ec 100644
--- a/src/libsystemd-bus/bus-control.c
+++ b/src/libsystemd-bus/bus-control.c
@@ -19,6 +19,10 @@
along with systemd; If not, see .
***/
+#ifdef HAVE_VALGRIND_MEMCHECK_H
+#include
+#endif
+
#include
#include
@@ -28,14 +32,18 @@
#include "bus-internal.h"
#include "bus-message.h"
#include "bus-control.h"
+#include "bus-bloom.h"
+#include "bus-util.h"
-int sd_bus_get_unique_name(sd_bus *bus, const char **unique) {
+_public_ int sd_bus_get_unique_name(sd_bus *bus, const char **unique) {
int r;
if (!bus)
return -EINVAL;
if (!unique)
return -EINVAL;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
r = bus_ensure_running(bus);
if (r < 0)
@@ -45,7 +53,7 @@ int sd_bus_get_unique_name(sd_bus *bus, const char **unique) {
return 0;
}
-int sd_bus_request_name(sd_bus *bus, const char *name, int flags) {
+_public_ int sd_bus_request_name(sd_bus *bus, const char *name, int flags) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
uint32_t ret;
int r;
@@ -54,29 +62,56 @@ int sd_bus_request_name(sd_bus *bus, const char *name, int flags) {
return -EINVAL;
if (!name)
return -EINVAL;
-
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "RequestName",
- NULL,
- &reply,
- "su",
- name,
- flags);
- if (r < 0)
- return r;
-
- r = sd_bus_message_read(reply, "u", &ret);
- if (r < 0)
- return r;
-
- return ret;
+ if (!bus->bus_client)
+ return -EINVAL;
+ if (!BUS_IS_OPEN(bus->state))
+ return -ENOTCONN;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ if (bus->is_kernel) {
+ struct kdbus_cmd_name *n;
+ size_t l;
+
+ l = strlen(name);
+ n = alloca0(offsetof(struct kdbus_cmd_name, name) + l + 1);
+ n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
+ n->flags = flags;
+ memcpy(n->name, name, l+1);
+
+#ifdef HAVE_VALGRIND_MEMCHECK_H
+ VALGRIND_MAKE_MEM_DEFINED(n, n->size);
+#endif
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_NAME_ACQUIRE, n);
+ if (r < 0)
+ return -errno;
+
+ return n->flags;
+ } else {
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/",
+ "org.freedesktop.DBus",
+ "RequestName",
+ NULL,
+ &reply,
+ "su",
+ name,
+ flags);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(reply, "u", &ret);
+ if (r < 0)
+ return r;
+
+ return ret;
+ }
}
-int sd_bus_release_name(sd_bus *bus, const char *name) {
+_public_ int sd_bus_release_name(sd_bus *bus, const char *name) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
uint32_t ret;
int r;
@@ -85,28 +120,53 @@ int sd_bus_release_name(sd_bus *bus, const char *name) {
return -EINVAL;
if (!name)
return -EINVAL;
-
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "ReleaseName",
- NULL,
- &reply,
- "s",
- name);
- if (r < 0)
- return r;
-
- r = sd_bus_message_read(reply, "u", &ret);
- if (r < 0)
- return r;
+ if (!bus->bus_client)
+ return -EINVAL;
+ if (!BUS_IS_OPEN(bus->state))
+ return -ENOTCONN;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
+
+ if (bus->is_kernel) {
+ struct kdbus_cmd_name *n;
+ size_t l;
+
+ l = strlen(name);
+ n = alloca0(offsetof(struct kdbus_cmd_name, name) + l + 1);
+ n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
+ memcpy(n->name, name, l+1);
+
+#ifdef HAVE_VALGRIND_MEMCHECK_H
+ VALGRIND_MAKE_MEM_DEFINED(n, n->size);
+#endif
+ r = ioctl(bus->input_fd, KDBUS_CMD_NAME_RELEASE, n);
+ if (r < 0)
+ return -errno;
+
+ return n->flags;
+ } else {
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/",
+ "org.freedesktop.DBus",
+ "ReleaseName",
+ NULL,
+ &reply,
+ "s",
+ name);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(reply, "u", &ret);
+ if (r < 0)
+ return r;
+ }
return ret;
}
-int sd_bus_list_names(sd_bus *bus, char ***l) {
+_public_ int sd_bus_list_names(sd_bus *bus, char ***l) {
_cleanup_bus_message_unref_ sd_bus_message *reply1 = NULL, *reply2 = NULL;
char **x = NULL;
int r;
@@ -115,6 +175,10 @@ int sd_bus_list_names(sd_bus *bus, char ***l) {
return -EINVAL;
if (!l)
return -EINVAL;
+ if (!BUS_IS_OPEN(bus->state))
+ return -ENOTCONN;
+ if (bus_pid_changed(bus))
+ return -ECHILD;
r = sd_bus_call_method(
bus,
@@ -156,15 +220,15 @@ int sd_bus_list_names(sd_bus *bus, char ***l) {
return 0;
}
-int sd_bus_get_owner(sd_bus *bus, const char *name, char **owner) {
+_public_ int sd_bus_get_owner(sd_bus *bus, const char *name, char **owner) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
const char *found;
int r;
- if (!bus)
- return -EINVAL;
- if (!name)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(name, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
r = sd_bus_call_method(
bus,
@@ -196,103 +260,348 @@ int sd_bus_get_owner(sd_bus *bus, const char *name, char **owner) {
return 0;
}
-int sd_bus_get_owner_uid(sd_bus *bus, const char *name, uid_t *uid) {
+_public_ int sd_bus_get_owner_creds(sd_bus *bus, const char *name, uint64_t mask, sd_bus_creds **creds) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- uint32_t u;
+ _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
+ pid_t pid = 0;
int r;
- if (!bus)
- return -EINVAL;
- if (!name)
- return -EINVAL;
- if (!uid)
- return -EINVAL;
+ assert_return(bus, -EINVAL);
+ assert_return(name, -EINVAL);
+ assert_return(mask <= _SD_BUS_CREDS_MAX, -ENOTSUP);
+ assert_return(creds, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ c = bus_creds_new();
+ if (!c)
+ return -ENOMEM;
+
+ if ((mask & SD_BUS_CREDS_PID) ||
+ mask & ~(SD_BUS_CREDS_PID|SD_BUS_CREDS_UID|SD_BUS_CREDS_SELINUX_CONTEXT)) {
+ uint32_t u;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/",
+ "org.freedesktop.DBus",
+ "GetConnectionUnixProcessID",
+ NULL,
+ &reply,
+ "s",
+ name);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(reply, "u", &u);
+ if (r < 0)
+ return r;
+
+ pid = u;
+ if (mask & SD_BUS_CREDS_PID) {
+ c->pid = u;
+ c->mask |= SD_BUS_CREDS_PID;
+ }
+
+ reply = sd_bus_message_unref(reply);
+ }
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "GetConnectionUnixUser",
- NULL,
- &reply,
- "s",
- name);
- if (r < 0)
- return r;
+ if (mask & SD_BUS_CREDS_UID) {
+ uint32_t u;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/",
+ "org.freedesktop.DBus",
+ "GetConnectionUnixUser",
+ NULL,
+ &reply,
+ "s",
+ name);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(reply, "u", &u);
+ if (r < 0)
+ return r;
+
+ c->uid = u;
+ c->mask |= SD_BUS_CREDS_UID;
+
+ reply = sd_bus_message_unref(reply);
+ }
+
+ if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
+ const void *p;
+ size_t sz;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/",
+ "org.freedesktop.DBus",
+ "GetConnectionSELinuxSecurityContext",
+ NULL,
+ &reply,
+ "s",
+ name);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read_array(reply, 'y', &p, &sz);
+ if (r < 0)
+ return r;
+
+ c->label = strndup(p, sz);
+ if (!c->label)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
+ }
- r = sd_bus_message_read(reply, "u", &u);
+ r = bus_creds_add_more(c, mask, pid, 0);
if (r < 0)
return r;
- *uid = (uid_t) u;
+ *creds = c;
+ c = NULL;
+
return 0;
}
-int sd_bus_get_owner_pid(sd_bus *bus, const char *name, pid_t *pid) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- uint32_t u;
- int r;
-
- if (!bus)
- return -EINVAL;
- if (!name)
- return -EINVAL;
- if (!pid)
- return -EINVAL;
+int bus_add_match_internal(
+ sd_bus *bus,
+ const char *match,
+ struct bus_match_component *components,
+ unsigned n_components,
+ uint64_t cookie) {
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "GetConnectionUnixProcessID",
- NULL,
- &reply,
- "s",
- name);
- if (r < 0)
- return r;
+ int r;
- r = sd_bus_message_read(reply, "u", &u);
- if (r < 0)
- return r;
+ assert(bus);
+ assert(match);
- if (u == 0)
- return -EIO;
+ if (bus->is_kernel) {
+ struct kdbus_cmd_match *m;
+ struct kdbus_item *item;
+ uint64_t bloom[BLOOM_SIZE/8];
+ size_t sz;
+ const char *sender = NULL;
+ size_t sender_length = 0;
+ uint64_t src_id = KDBUS_MATCH_SRC_ID_ANY;
+ bool using_bloom = false;
+ unsigned i;
+
+ zero(bloom);
+
+ sz = offsetof(struct kdbus_cmd_match, items);
+
+ for (i = 0; i < n_components; i++) {
+ struct bus_match_component *c = &components[i];
+
+ switch (c->type) {
+
+ case BUS_MATCH_SENDER:
+ r = bus_kernel_parse_unique_name(c->value_str, &src_id);
+ if (r < 0)
+ return r;
+
+ if (r > 0) {
+ sender = c->value_str;
+ sender_length = strlen(sender);
+ sz += ALIGN8(offsetof(struct kdbus_item, str) + sender_length + 1);
+ }
+
+ break;
+
+ case BUS_MATCH_MESSAGE_TYPE:
+ bloom_add_pair(bloom, "message-type", bus_message_type_to_string(c->value_u8));
+ using_bloom = true;
+ break;
+
+ case BUS_MATCH_INTERFACE:
+ bloom_add_pair(bloom, "interface", c->value_str);
+ using_bloom = true;
+ break;
+
+ case BUS_MATCH_MEMBER:
+ bloom_add_pair(bloom, "member", c->value_str);
+ using_bloom = true;
+ break;
+
+ case BUS_MATCH_PATH:
+ bloom_add_pair(bloom, "path", c->value_str);
+ using_bloom = true;
+ break;
+
+ case BUS_MATCH_PATH_NAMESPACE:
+ if (!streq(c->value_str, "/")) {
+ bloom_add_pair(bloom, "path-slash-prefix", c->value_str);
+ using_bloom = true;
+ }
+ break;
+
+ case BUS_MATCH_ARG...BUS_MATCH_ARG_LAST: {
+ char buf[sizeof("arg")-1 + 2 + 1];
+
+ snprintf(buf, sizeof(buf), "arg%u", c->type - BUS_MATCH_ARG);
+ bloom_add_pair(bloom, buf, c->value_str);
+ using_bloom = true;
+ break;
+ }
+
+ case BUS_MATCH_ARG_PATH...BUS_MATCH_ARG_PATH_LAST: {
+ char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")];
+
+ snprintf(buf, sizeof(buf), "arg%u-slash-prefix", c->type - BUS_MATCH_ARG_PATH);
+ bloom_add_pair(bloom, buf, c->value_str);
+ using_bloom = true;
+ break;
+ }
+
+ case BUS_MATCH_ARG_NAMESPACE...BUS_MATCH_ARG_NAMESPACE_LAST: {
+ char buf[sizeof("arg")-1 + 2 + sizeof("-dot-prefix")];
+
+ snprintf(buf, sizeof(buf), "arg%u-dot-prefix", c->type - BUS_MATCH_ARG_NAMESPACE);
+ bloom_add_pair(bloom, buf, c->value_str);
+ using_bloom = true;
+ break;
+ }
+
+ case BUS_MATCH_DESTINATION:
+ /* The bloom filter does not include
+ the destination, since it is only
+ available for broadcast messages
+ which do not carry a destination
+ since they are undirected. */
+ break;
+
+ case BUS_MATCH_ROOT:
+ case BUS_MATCH_VALUE:
+ case BUS_MATCH_LEAF:
+ case _BUS_MATCH_NODE_TYPE_MAX:
+ case _BUS_MATCH_NODE_TYPE_INVALID:
+ assert_not_reached("Invalid match type?");
+ }
+ }
+
+ if (using_bloom)
+ sz += ALIGN8(offsetof(struct kdbus_item, data64) + BLOOM_SIZE);
+
+ m = alloca0(sz);
+ m->size = sz;
+ m->cookie = cookie;
+ m->src_id = src_id;
+
+ item = m->items;
+
+ if (using_bloom) {
+ item->size = offsetof(struct kdbus_item, data64) + BLOOM_SIZE;
+ item->type = KDBUS_MATCH_BLOOM;
+ memcpy(item->data64, bloom, BLOOM_SIZE);
+
+ item = KDBUS_ITEM_NEXT(item);
+ }
+
+ if (sender) {
+ item->size = offsetof(struct kdbus_item, str) + sender_length + 1;
+ item->type = KDBUS_MATCH_SRC_NAME;
+ memcpy(item->str, sender, sender_length + 1);
+ }
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+
+ } else {
+ return sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/",
+ "org.freedesktop.DBus",
+ "AddMatch",
+ NULL,
+ NULL,
+ "s",
+ match);
+ }
- *pid = (uid_t) u;
return 0;
}
-int bus_add_match_internal(sd_bus *bus, const char *match) {
+int bus_remove_match_internal(
+ sd_bus *bus,
+ const char *match,
+ uint64_t cookie) {
+
+ int r;
+
assert(bus);
assert(match);
- return sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "AddMatch",
- NULL,
- NULL,
- "s",
- match);
+ if (bus->is_kernel) {
+ struct kdbus_cmd_match m;
+
+ zero(m);
+ m.size = offsetof(struct kdbus_cmd_match, items);
+ m.cookie = cookie;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_REMOVE, &m);
+ if (r < 0)
+ return -errno;
+
+ } else {
+ return sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/",
+ "org.freedesktop.DBus",
+ "RemoveMatch",
+ NULL,
+ NULL,
+ "s",
+ match);
+ }
+
+ return 0;
}
-int bus_remove_match_internal(sd_bus *bus, const char *match) {
- assert(bus);
- assert(match);
+_public_ int sd_bus_get_owner_machine_id(sd_bus *bus, const char *name, sd_id128_t *machine) {
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL, *m = NULL;
+ const char *mid;
+ int r;
+
+ assert_return(bus, -EINVAL);
+ assert_return(name, -EINVAL);
+ assert_return(machine, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
- return sd_bus_call_method(
+ if (streq_ptr(name, bus->unique_name))
+ return sd_id128_get_machine(machine);
+
+ r = sd_bus_message_new_method_call(
bus,
- "org.freedesktop.DBus",
+ name,
"/",
- "org.freedesktop.DBus",
- "RemoveMatch",
- NULL,
- NULL,
- "s",
- match);
+ "org.freedesktop.DBus.Peer",
+ "GetMachineId", &m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_set_no_auto_start(m, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_call(bus, m, 0, NULL, &reply);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(reply, "s", &mid);
+ if (r < 0)
+ return r;
+
+ return sd_id128_from_string(mid, machine);
}