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=511ca20ee3b4e614ef135dbeef12c99297abb3ff;hp=7c139cfd32cab7cb579e837056d58204ce7a9466;hb=751bc6ac79320bc16e63e8c1bbb713c30a3b7bc9;hpb=f08838da225678269945868a71bbdc79de967e1d
diff --git a/src/libsystemd-bus/bus-control.c b/src/libsystemd-bus/bus-control.c
index 7c139cfd3..511ca20ee 100644
--- a/src/libsystemd-bus/bus-control.c
+++ b/src/libsystemd-bus/bus-control.c
@@ -19,23 +19,28 @@
along with systemd; If not, see .
***/
+#ifdef HAVE_VALGRIND_MEMCHECK_H
+#include
+#endif
+
#include
#include
#include "strv.h"
-
#include "sd-bus.h"
#include "bus-internal.h"
#include "bus-message.h"
#include "bus-control.h"
+#include "bus-bloom.h"
+#include "bus-util.h"
+#include "cgroup-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;
+ assert_return(bus, -EINVAL);
+ assert_return(unique, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
r = bus_ensure_running(bus);
if (r < 0)
@@ -45,274 +50,1054 @@ 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) {
+static int bus_request_name_kernel(sd_bus *bus, const char *name, uint64_t flags) {
+ struct kdbus_cmd_name *n;
+ size_t size, l;
+ int r;
+
+ assert(bus);
+ assert(name);
+
+ l = strlen(name);
+ size = offsetof(struct kdbus_cmd_name, name) + l + 1;
+ n = alloca0(size);
+ n->size = size;
+ kdbus_translate_request_name_flags(flags, (uint64_t *) &n->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;
+
+ if (n->flags & KDBUS_NAME_IN_QUEUE)
+ return 0;
+
+ return 1;
+}
+
+static int bus_request_name_dbus1(sd_bus *bus, const char *name, uint64_t flags) {
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ uint32_t ret, param = 0;
+ int r;
+
+ assert(bus);
+ assert(name);
+
+ if (flags & SD_BUS_NAME_ALLOW_REPLACEMENT)
+ param |= BUS_NAME_ALLOW_REPLACEMENT;
+ if (flags & SD_BUS_NAME_REPLACE_EXISTING)
+ param |= BUS_NAME_REPLACE_EXISTING;
+ if (!(flags & SD_BUS_NAME_QUEUE))
+ param |= BUS_NAME_DO_NOT_QUEUE;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "RequestName",
+ NULL,
+ &reply,
+ "su",
+ name,
+ param);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(reply, "u", &ret);
+ if (r < 0)
+ return r;
+
+ if (ret == BUS_NAME_ALREADY_OWNER)
+ return -EALREADY;
+ else if (ret == BUS_NAME_EXISTS)
+ return -EEXIST;
+ else if (ret == BUS_NAME_IN_QUEUE)
+ return 0;
+ else if (ret == BUS_NAME_PRIMARY_OWNER)
+ return 1;
+
+ return -EIO;
+}
+
+_public_ int sd_bus_request_name(sd_bus *bus, const char *name, uint64_t flags) {
+ assert_return(bus, -EINVAL);
+ assert_return(name, -EINVAL);
+ assert_return(bus->bus_client, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(!(flags & ~(SD_BUS_NAME_ALLOW_REPLACEMENT|SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_QUEUE)), -EINVAL);
+ assert_return(service_name_is_valid(name), -EINVAL);
+ assert_return(name[0] != ':', -EINVAL);
+
+ if (bus->is_kernel)
+ return bus_request_name_kernel(bus, name, flags);
+ else
+ return bus_request_name_dbus1(bus, name, flags);
+}
+
+static int bus_release_name_kernel(sd_bus *bus, const char *name) {
+ struct kdbus_cmd_name *n;
+ size_t l;
+ int r;
+
+ assert(bus);
+ assert(name);
+
+ 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;
+}
+
+static int bus_release_name_dbus1(sd_bus *bus, const char *name) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
uint32_t ret;
int r;
- if (!bus)
- return -EINVAL;
- if (!name)
- return -EINVAL;
- if (!bus->bus_client)
- return -EINVAL;
-
- if (bus->is_kernel) {
- struct kdbus_cmd_name *n;
- size_t l;
-
- l = strlen(name);
- n = alloca(offsetof(struct kdbus_cmd_name, name) + l + 1);
- n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
- n->flags = flags;
- n->id = 0;
- memcpy(n->name, name, l+1);
-
- r = ioctl(bus->input_fd, KDBUS_CMD_NAME_ACQUIRE, n);
+ assert(bus);
+ assert(name);
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/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 (ret == BUS_NAME_NON_EXISTENT)
+ return -ESRCH;
+ if (ret == BUS_NAME_NOT_OWNER)
+ return -EADDRINUSE;
+ if (ret == BUS_NAME_RELEASED)
+ return 0;
+
+ return -EINVAL;
+}
+
+_public_ int sd_bus_release_name(sd_bus *bus, const char *name) {
+ assert_return(bus, -EINVAL);
+ assert_return(name, -EINVAL);
+ assert_return(bus->bus_client, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(service_name_is_valid(name), -EINVAL);
+ assert_return(name[0] != ':', -EINVAL);
+
+ if (bus->is_kernel)
+ return bus_release_name_kernel(bus, name);
+ else
+ return bus_release_name_dbus1(bus, name);
+}
+
+static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {
+ struct kdbus_cmd_name_list cmd = {};
+ struct kdbus_name_list *name_list;
+ struct kdbus_cmd_name *name;
+ uint64_t previous_id = 0;
+ int r;
+
+ /* Caller will free half-constructed list on failure... */
+
+ cmd.flags = flags;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
+ if (r < 0)
+ return -errno;
+
+ name_list = (struct kdbus_name_list *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);
+
+ KDBUS_ITEM_FOREACH(name, name_list, names) {
+
+ if ((flags & KDBUS_NAME_LIST_UNIQUE) && name->owner_id != previous_id) {
+ char *n;
+
+ if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0)
+ return -ENOMEM;
+
+ r = strv_push(x, n);
+ if (r < 0) {
+ free(n);
+ return -ENOMEM;
+ }
+
+ previous_id = name->owner_id;
+ }
+
+ if (name->size > sizeof(*name) && service_name_is_valid(name->name)) {
+ r = strv_extend(x, name->name);
+ if (r < 0)
+ return -ENOMEM;
+ }
+ }
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd.offset);
+ if (r < 0)
+ return -errno;
+
+ return 0;
+}
+
+static int bus_list_names_kernel(sd_bus *bus, char ***acquired, char ***activatable) {
+ _cleanup_strv_free_ char **x = NULL, **y = NULL;
+ int r;
+
+ if (acquired) {
+ r = kernel_get_list(bus, KDBUS_NAME_LIST_UNIQUE | KDBUS_NAME_LIST_NAMES, &x);
if (r < 0)
- return -errno;
+ return r;
+ }
- return n->flags;
- } else {
+ if (activatable) {
+ r = kernel_get_list(bus, KDBUS_NAME_LIST_ACTIVATORS, &y);
+ if (r < 0)
+ return r;
+
+ *activatable = y;
+ y = NULL;
+ }
+
+ if (acquired) {
+ *acquired = x;
+ x = NULL;
+ }
+
+ return 0;
+}
+
+static int bus_list_names_dbus1(sd_bus *bus, char ***acquired, char ***activatable) {
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_strv_free_ char **x = NULL, **y = NULL;
+ int r;
+
+ if (acquired) {
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
- "/",
+ "/org/freedesktop/DBus",
"org.freedesktop.DBus",
- "RequestName",
+ "ListNames",
NULL,
&reply,
- "su",
- name,
- flags);
+ NULL);
if (r < 0)
return r;
- r = sd_bus_message_read(reply, "u", &ret);
+ r = sd_bus_message_read_strv(reply, &x);
if (r < 0)
return r;
- return ret;
+ reply = sd_bus_message_unref(reply);
}
-}
-
-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;
-
- if (!bus)
- return -EINVAL;
- if (!name)
- return -EINVAL;
- if (!bus->bus_client)
- return -EINVAL;
-
- if (bus->is_kernel) {
- struct kdbus_cmd_name *n;
- size_t l;
-
- l = strlen(name);
- n = alloca(offsetof(struct kdbus_cmd_name, name) + l + 1);
- n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
- n->flags = 0;
- n->id = 0;
- memcpy(n->name, name, l+1);
-
- r = ioctl(bus->input_fd, KDBUS_CMD_NAME_RELEASE, n);
- if (r < 0)
- return -errno;
- return n->flags;
- } else {
+ if (activatable) {
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
- "/",
+ "/org/freedesktop/DBus",
"org.freedesktop.DBus",
- "ReleaseName",
+ "ListActivatableNames",
NULL,
&reply,
- "s",
- name);
+ NULL);
if (r < 0)
return r;
- r = sd_bus_message_read(reply, "u", &ret);
+ r = sd_bus_message_read_strv(reply, &y);
if (r < 0)
return r;
+
+ *activatable = y;
+ y = NULL;
}
- return ret;
+ if (acquired) {
+ *acquired = x;
+ x = NULL;
+ }
+
+ return 0;
+}
+
+_public_ int sd_bus_list_names(sd_bus *bus, char ***acquired, char ***activatable) {
+ assert_return(bus, -EINVAL);
+ assert_return(acquired || activatable, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+
+ if (bus->is_kernel)
+ return bus_list_names_kernel(bus, acquired, activatable);
+ else
+ return bus_list_names_dbus1(bus, acquired, activatable);
}
-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;
+static int bus_get_owner_kdbus(
+ sd_bus *bus,
+ const char *name,
+ uint64_t mask,
+ sd_bus_creds **creds) {
- if (!bus)
- return -EINVAL;
- if (!l)
- return -EINVAL;
+ _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
+ struct kdbus_cmd_conn_info *cmd;
+ struct kdbus_conn_info *conn_info;
+ struct kdbus_item *item;
+ size_t size;
+ uint64_t m, id;
+ int r;
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "ListNames",
- NULL,
- &reply1,
- NULL);
+ r = bus_kernel_parse_unique_name(name, &id);
if (r < 0)
return r;
+ if (r > 0) {
+ size = offsetof(struct kdbus_cmd_conn_info, name);
+ cmd = alloca0(size);
+ cmd->id = id;
+ } else {
+ size = offsetof(struct kdbus_cmd_conn_info, name) + strlen(name) + 1;
+ cmd = alloca0(size);
+ strcpy(cmd->name, name);
+ }
+ cmd->flags = KDBUS_ATTACH_NAMES;
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "ListActivatableNames",
- NULL,
- &reply2,
- NULL);
+ cmd->size = size;
+ r = ioctl(bus->input_fd, KDBUS_CMD_CONN_INFO, cmd);
if (r < 0)
- return r;
+ return -errno;
- r = bus_message_read_strv_extend(reply1, &x);
- if (r < 0) {
- strv_free(x);
- return r;
+ conn_info = (struct kdbus_conn_info *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);
+
+ /* Non-activated names are considered not available */
+ if (conn_info->flags & KDBUS_HELLO_ACTIVATOR)
+ return name[0] == ':' ? -ENXIO : -ENOENT;
+
+ c = bus_creds_new();
+ if (!c)
+ return -ENOMEM;
+
+ if (mask & SD_BUS_CREDS_UNIQUE_NAME) {
+ if (asprintf(&c->unique_name, ":1.%llu", (unsigned long long) conn_info->id) < 0)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
}
- r = bus_message_read_strv_extend(reply2, &x);
- if (r < 0) {
- strv_free(x);
- return r;
+ KDBUS_ITEM_FOREACH(item, conn_info, items) {
+
+ switch (item->type) {
+
+ case KDBUS_ITEM_CREDS:
+ m = (SD_BUS_CREDS_UID | SD_BUS_CREDS_GID | SD_BUS_CREDS_PID) & mask;
+
+ if (m) {
+ c->uid = item->creds.uid;
+ c->pid = item->creds.pid;
+ c->gid = item->creds.gid;
+ c->mask |= m;
+ }
+
+ if (mask & SD_BUS_CREDS_TID && item->creds.tid > 0) {
+ c->tid = item->creds.tid;
+ c->mask |= SD_BUS_CREDS_TID;
+ }
+
+ if (mask & SD_BUS_CREDS_PID_STARTTIME && item->creds.starttime > 0) {
+ c->pid_starttime = item->creds.starttime;
+ c->mask |= SD_BUS_CREDS_PID_STARTTIME;
+ }
+
+ break;
+
+ case KDBUS_ITEM_PID_COMM:
+ if (mask & SD_BUS_CREDS_COMM) {
+ c->comm = strdup(item->str);
+ if (!c->comm) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->mask |= SD_BUS_CREDS_COMM;
+ }
+ break;
+
+ case KDBUS_ITEM_TID_COMM:
+ if (mask & SD_BUS_CREDS_TID_COMM) {
+ c->tid_comm = strdup(item->str);
+ if (!c->tid_comm) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->mask |= SD_BUS_CREDS_TID_COMM;
+ }
+ break;
+
+ case KDBUS_ITEM_EXE:
+ if (mask & SD_BUS_CREDS_EXE) {
+ c->exe = strdup(item->str);
+ if (!c->exe) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->mask |= SD_BUS_CREDS_EXE;
+ }
+ break;
+
+ case KDBUS_ITEM_CMDLINE:
+ if (mask & SD_BUS_CREDS_CMDLINE) {
+ c->cmdline_size = item->size - KDBUS_ITEM_HEADER_SIZE;
+ c->cmdline = memdup(item->data, c->cmdline_size);
+ if (!c->cmdline) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->mask |= SD_BUS_CREDS_CMDLINE;
+ }
+ break;
+
+ case KDBUS_ITEM_CGROUP:
+ m = (SD_BUS_CREDS_CGROUP | SD_BUS_CREDS_UNIT |
+ SD_BUS_CREDS_USER_UNIT | SD_BUS_CREDS_SLICE |
+ SD_BUS_CREDS_SESSION | SD_BUS_CREDS_OWNER_UID) & mask;
+
+ if (m) {
+ c->cgroup = strdup(item->str);
+ if (!c->cgroup) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ if (!bus->cgroup_root) {
+ r = cg_get_root_path(&bus->cgroup_root);
+ if (r < 0)
+ goto fail;
+ }
+
+ c->cgroup_root = strdup(bus->cgroup_root);
+ if (!c->cgroup_root) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->mask |= m;
+ }
+ break;
+
+ case KDBUS_ITEM_CAPS:
+ m = (SD_BUS_CREDS_EFFECTIVE_CAPS | SD_BUS_CREDS_PERMITTED_CAPS |
+ SD_BUS_CREDS_INHERITABLE_CAPS | SD_BUS_CREDS_BOUNDING_CAPS) & mask;
+
+ if (m) {
+ c->capability_size = item->size - KDBUS_ITEM_HEADER_SIZE;
+ c->capability = memdup(item->data, c->capability_size);
+ if (!c->capability) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->mask |= m;
+ }
+ break;
+
+ case KDBUS_ITEM_SECLABEL:
+ if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
+ c->label = strdup(item->str);
+ if (!c->label) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
+ }
+ break;
+
+ case KDBUS_ITEM_AUDIT:
+ m = (SD_BUS_CREDS_AUDIT_SESSION_ID | SD_BUS_CREDS_AUDIT_LOGIN_UID) & mask;
+
+ if (m) {
+ c->audit_session_id = item->audit.sessionid;
+ c->audit_login_uid = item->audit.loginuid;
+ c->mask |= m;
+ }
+ break;
+
+ case KDBUS_ITEM_NAME:
+ if ((mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) && service_name_is_valid(item->name.name)) {
+ r = strv_extend(&c->well_known_names, item->name.name);
+ if (r < 0)
+ goto fail;
+
+ c->mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES;
+ }
+ break;
+ }
}
- *l = strv_uniq(x);
- return 0;
+ if (creds) {
+ *creds = c;
+ c = NULL;
+ }
+
+ r = 0;
+
+fail:
+ ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd->offset);
+ return r;
}
-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;
+static int bus_get_owner_dbus1(
+ sd_bus *bus,
+ const char *name,
+ uint64_t mask,
+ sd_bus_creds **creds) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply_unique = NULL, *reply = NULL;
+ _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
+ const char *unique = NULL;
+ pid_t pid = 0;
int r;
- if (!bus)
- return -EINVAL;
- if (!name)
- return -EINVAL;
+ /* Only query the owner if the caller wants to know it or if
+ * the caller just wants to check whether a name exists */
+ if ((mask & SD_BUS_CREDS_UNIQUE_NAME) || mask == 0) {
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "GetNameOwner",
+ NULL,
+ &reply_unique,
+ "s",
+ name);
+ if (r < 0)
+ return r;
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "GetNameOwner",
- NULL,
- &reply,
- "s",
- name);
- if (r < 0)
- return r;
+ r = sd_bus_message_read(reply_unique, "s", &unique);
+ if (r < 0)
+ return r;
+ }
- r = sd_bus_message_read(reply, "s", &found);
- if (r < 0)
- return r;
+ if (mask != 0) {
+ c = bus_creds_new();
+ if (!c)
+ return -ENOMEM;
- if (owner) {
- char *t;
+ if ((mask & SD_BUS_CREDS_UNIQUE_NAME) && unique) {
+ c->unique_name = strdup(unique);
+ if (!c->unique_name)
+ return -ENOMEM;
- t = strdup(found);
- if (!t)
- return -ENOMEM;
+ c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
+ }
+
+ if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_GID|
+ SD_BUS_CREDS_COMM|SD_BUS_CREDS_EXE|SD_BUS_CREDS_CMDLINE|
+ SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID|
+ SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS|
+ SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)) {
+ uint32_t u;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "GetConnectionUnixProcessID",
+ NULL,
+ &reply,
+ "s",
+ unique ? unique : 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);
+ }
+
+ if (mask & SD_BUS_CREDS_UID) {
+ uint32_t u;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.DBus",
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "GetConnectionUnixUser",
+ NULL,
+ &reply,
+ "s",
+ unique ? unique : name);
+ if (r < 0)
+ return r;
- *owner = t;
+ 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",
+ "org.freedesktop.DBus",
+ "GetConnectionSELinuxSecurityContext",
+ NULL,
+ &reply,
+ "s",
+ unique ? unique : 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 = bus_creds_add_more(c, mask, pid, 0);
+ if (r < 0)
+ return r;
+ }
+
+ if (creds) {
+ *creds = c;
+ c = NULL;
}
return 0;
}
-int sd_bus_get_owner_uid(sd_bus *bus, const char *name, uid_t *uid) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- uint32_t u;
- int r;
+_public_ int sd_bus_get_owner(
+ sd_bus *bus,
+ const char *name,
+ uint64_t mask,
+ sd_bus_creds **creds) {
- 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_ALL, -ENOTSUP);
+ assert_return(mask == 0 || creds, -EINVAL);
+ assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(service_name_is_valid(name), -EINVAL);
+ assert_return(bus->bus_client, -ENODATA);
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "GetConnectionUnixUser",
- NULL,
- &reply,
- "s",
- name);
- if (r < 0)
- return r;
+ if (bus->is_kernel)
+ return bus_get_owner_kdbus(bus, name, mask, creds);
+ else
+ return bus_get_owner_dbus1(bus, name, mask, creds);
+}
- r = sd_bus_message_read(reply, "u", &u);
- if (r < 0)
- return r;
+static int add_name_change_match(sd_bus *bus,
+ uint64_t cookie,
+ const char *name,
+ const char *old_owner,
+ const char *new_owner) {
+
+ uint64_t name_id = KDBUS_MATCH_ID_ANY, old_owner_id = 0, new_owner_id = 0;
+ int is_name_id = -1, r;
+ struct kdbus_item *item;
+
+ assert(bus);
+
+ /* If we encounter a match that could match against
+ * NameOwnerChanged messages, then we need to create
+ * KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE} and
+ * KDBUS_ITEM_ID_{ADD,REMOVE} matches for it, possibly
+ * multiple if the match is underspecified.
+ *
+ * The NameOwnerChanged signals take three parameters with
+ * unique or well-known names, but only some forms actually
+ * exist:
+ *
+ * WELLKNOWN, "", UNIQUE â KDBUS_ITEM_NAME_ADD
+ * WELLKNOWN, UNIQUE, "" â KDBUS_ITEM_NAME_REMOVE
+ * WELLKNOWN, UNIQUE, UNIQUE â KDBUS_ITEM_NAME_CHANGE
+ * UNIQUE, "", UNIQUE â KDBUS_ITEM_ID_ADD
+ * UNIQUE, UNIQUE, "" â KDBUS_ITEM_ID_REMOVE
+ *
+ * For the latter two the two unique names must be identical.
+ *
+ * */
+
+ if (name) {
+ is_name_id = bus_kernel_parse_unique_name(name, &name_id);
+ if (is_name_id < 0)
+ return 0;
+ }
+
+ if (!isempty(old_owner)) {
+ r = bus_kernel_parse_unique_name(old_owner, &old_owner_id);
+ if (r < 0)
+ return 0;
+ if (r == 0)
+ return 0;
+ if (is_name_id > 0 && old_owner_id != name_id)
+ return 0;
+ } else
+ old_owner_id = KDBUS_MATCH_ID_ANY;
+
+ if (!isempty(new_owner)) {
+ r = bus_kernel_parse_unique_name(new_owner, &new_owner_id);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 0;
+ if (is_name_id > 0 && new_owner_id != name_id)
+ return 0;
+ } else
+ new_owner_id = KDBUS_MATCH_ID_ANY;
+
+ if (is_name_id <= 0) {
+ struct kdbus_cmd_match *m;
+ size_t sz, l;
+
+ /* If the name argument is missing or is a well-known
+ * name, then add KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE}
+ * matches for it */
+
+ l = name ? strlen(name) + 1 : 0;
+
+ sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
+ offsetof(struct kdbus_item, name_change) +
+ offsetof(struct kdbus_notify_name_change, name) +
+ l);
+
+ m = alloca0(sz);
+ m->size = sz;
+ m->cookie = cookie;
+
+ item = m->items;
+ item->size =
+ offsetof(struct kdbus_item, name_change) +
+ offsetof(struct kdbus_notify_name_change, name) +
+ l;
+
+ item->name_change.old.id = old_owner_id;
+ item->name_change.new.id = new_owner_id;
+
+ if (name)
+ memcpy(item->name_change.name, name, l);
+
+ /* If the old name is unset or empty, then
+ * this can match against added names */
+ if (!old_owner || old_owner[0] == 0) {
+ item->type = KDBUS_ITEM_NAME_ADD;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+
+ /* If the new name is unset or empty, then
+ * this can match against removed names */
+ if (!new_owner || new_owner[0] == 0) {
+ item->type = KDBUS_ITEM_NAME_REMOVE;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+
+ /* The CHANGE match we need in either case, because
+ * what is reported as a name change by the kernel
+ * might just be an owner change between starter and
+ * normal clients. For userspace such a change should
+ * be considered a removal/addition, hence let's
+ * subscribe to this unconditionally. */
+ item->type = KDBUS_ITEM_NAME_CHANGE;
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+
+ if (is_name_id != 0) {
+ struct kdbus_cmd_match *m;
+ uint64_t sz;
+
+ /* If the name argument is missing or is a unique
+ * name, then add KDBUS_ITEM_ID_{ADD,REMOVE} matches
+ * for it */
+
+ sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
+ offsetof(struct kdbus_item, id_change) +
+ sizeof(struct kdbus_notify_id_change));
+
+ m = alloca0(sz);
+ m->size = sz;
+ m->cookie = cookie;
+
+ item = m->items;
+ item->size =
+ offsetof(struct kdbus_item, id_change) +
+ sizeof(struct kdbus_notify_id_change);
+ item->id_change.id = name_id;
+
+ /* If the old name is unset or empty, then this can
+ * match against added ids */
+ if (!old_owner || old_owner[0] == 0) {
+ item->type = KDBUS_ITEM_ID_ADD;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+
+ /* If thew new name is unset or empty, then this can
+ * match against removed ids */
+ if (!new_owner || new_owner[0] == 0) {
+ item->type = KDBUS_ITEM_ID_REMOVE;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+ }
- *uid = (uid_t) u;
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 bus_add_match_internal_kernel(
+ sd_bus *bus,
+ uint64_t id,
+ struct bus_match_component *components,
+ unsigned n_components,
+ uint64_t cookie) {
+
+ 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_ID_ANY;
+ bool using_bloom = false;
+ unsigned i;
+ bool matches_name_change = true;
+ const char *name_change_arg[3] = {};
int r;
- if (!bus)
- return -EINVAL;
- if (!name)
- return -EINVAL;
- if (!pid)
- return -EINVAL;
+ assert(bus);
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/",
- "org.freedesktop.DBus",
- "GetConnectionUnixProcessID",
- NULL,
- &reply,
- "s",
- name);
- if (r < 0)
- return r;
+ zero(bloom);
+
+ sz = ALIGN8(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:
+ if (!streq(c->value_str, "org.freedesktop.DBus"))
+ matches_name_change = false;
+
+ r = bus_kernel_parse_unique_name(c->value_str, &src_id);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ sz += ALIGN8(offsetof(struct kdbus_item, id) + sizeof(uint64_t));
+ else {
+ sender = c->value_str;
+ sender_length = strlen(sender);
+ sz += ALIGN8(offsetof(struct kdbus_item, str) + sender_length + 1);
+ }
+
+ break;
+
+ case BUS_MATCH_MESSAGE_TYPE:
+ if (c->value_u8 != SD_BUS_MESSAGE_SIGNAL)
+ matches_name_change = false;
+
+ bloom_add_pair(bloom, "message-type", bus_message_type_to_string(c->value_u8));
+ using_bloom = true;
+ break;
+
+ case BUS_MATCH_INTERFACE:
+ if (!streq(c->value_str, "org.freedesktop.DBus"))
+ matches_name_change = false;
+
+ bloom_add_pair(bloom, "interface", c->value_str);
+ using_bloom = true;
+ break;
+
+ case BUS_MATCH_MEMBER:
+ if (!streq(c->value_str, "NameOwnerChanged"))
+ matches_name_change = false;
+
+ bloom_add_pair(bloom, "member", c->value_str);
+ using_bloom = true;
+ break;
+
+ case BUS_MATCH_PATH:
+ if (!streq(c->value_str, "/org/freedesktop/DBus"))
+ matches_name_change = false;
+
+ 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];
- r = sd_bus_message_read(reply, "u", &u);
+ if (c->type - BUS_MATCH_ARG < 3)
+ name_change_arg[c->type - BUS_MATCH_ARG] = c->value_str;
+
+ 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->owner_id = id;
+
+ item = m->items;
+
+ if (src_id != KDBUS_MATCH_ID_ANY) {
+ item->size = offsetof(struct kdbus_item, id) + sizeof(uint64_t);
+ item->type = KDBUS_ITEM_ID;
+ item->id = src_id;
+ item = KDBUS_ITEM_NEXT(item);
+ }
+
+ if (using_bloom) {
+ item->size = offsetof(struct kdbus_item, data64) + BLOOM_SIZE;
+ item->type = KDBUS_ITEM_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_ITEM_NAME;
+ memcpy(item->str, sender, sender_length + 1);
+ }
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
if (r < 0)
- return r;
+ return -errno;
+
+ if (matches_name_change) {
+
+ /* If this match could theoretically match
+ * NameOwnerChanged messages, we need to
+ * install a second non-bloom filter explitly
+ * for it */
- if (u == 0)
- return -EIO;
+ r = add_name_change_match(bus, cookie, name_change_arg[0], name_change_arg[1], name_change_arg[2]);
+ if (r < 0)
+ return r;
+ }
- *pid = (uid_t) u;
return 0;
}
-int bus_add_match_internal(sd_bus *bus, const char *match) {
+static int bus_add_match_internal_dbus1(
+ sd_bus *bus,
+ const char *match) {
+
assert(bus);
assert(match);
return sd_bus_call_method(
bus,
"org.freedesktop.DBus",
- "/",
+ "/org/freedesktop/DBus",
"org.freedesktop.DBus",
"AddMatch",
NULL,
@@ -321,14 +1106,55 @@ int bus_add_match_internal(sd_bus *bus, const char *match) {
match);
}
-int bus_remove_match_internal(sd_bus *bus, const char *match) {
+int bus_add_match_internal(
+ sd_bus *bus,
+ const char *match,
+ struct bus_match_component *components,
+ unsigned n_components,
+ uint64_t cookie) {
+
+ assert(bus);
+ assert(match);
+
+ if (bus->is_kernel)
+ return bus_add_match_internal_kernel(bus, 0, components, n_components, cookie);
+ else
+ return bus_add_match_internal_dbus1(bus, match);
+}
+
+int bus_remove_match_internal_kernel(
+ sd_bus *bus,
+ uint64_t id,
+ uint64_t cookie) {
+
+ struct kdbus_cmd_match m;
+ int r;
+
+ assert(bus);
+
+ zero(m);
+ m.size = offsetof(struct kdbus_cmd_match, items);
+ m.cookie = cookie;
+ m.owner_id = id;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_REMOVE, &m);
+ if (r < 0)
+ return -errno;
+
+ return 0;
+}
+
+static int bus_remove_match_internal_dbus1(
+ sd_bus *bus,
+ const char *match) {
+
assert(bus);
assert(match);
return sd_bus_call_method(
bus,
"org.freedesktop.DBus",
- "/",
+ "/org/freedesktop/DBus",
"org.freedesktop.DBus",
"RemoveMatch",
NULL,
@@ -336,3 +1162,56 @@ int bus_remove_match_internal(sd_bus *bus, const char *match) {
"s",
match);
}
+
+int bus_remove_match_internal(
+ sd_bus *bus,
+ const char *match,
+ uint64_t cookie) {
+
+ assert(bus);
+ assert(match);
+
+ if (bus->is_kernel)
+ return bus_remove_match_internal_kernel(bus, 0, cookie);
+ else
+ return bus_remove_match_internal_dbus1(bus, 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);
+ assert_return(service_name_is_valid(name), -EINVAL);
+
+ if (streq_ptr(name, bus->unique_name))
+ return sd_id128_get_machine(machine);
+
+ r = sd_bus_message_new_method_call(
+ bus,
+ name,
+ "/",
+ "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);
+}