+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#ifdef HAVE_VALGRIND_MEMCHECK_H
-#include <valgrind/memcheck.h>
-#endif
-
-#include <stddef.h>
-#include <errno.h>
-
-#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"
-
-_public_ int sd_bus_get_unique_name(sd_bus *bus, const char **unique) {
- int r;
-
- assert_return(bus, -EINVAL);
- assert_return(unique, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- r = bus_ensure_running(bus);
- if (r < 0)
- return r;
-
- *unique = bus->unique_name;
- return 0;
-}
-
-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;
-
- 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 r;
- }
-
- 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",
- "ListNames",
- NULL,
- &reply,
- NULL);
- if (r < 0)
- return r;
-
- r = sd_bus_message_read_strv(reply, &x);
- if (r < 0)
- return r;
-
- reply = sd_bus_message_unref(reply);
- }
-
- if (activatable) {
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/org/freedesktop/DBus",
- "org.freedesktop.DBus",
- "ListActivatableNames",
- NULL,
- &reply,
- NULL);
- if (r < 0)
- return r;
-
- r = sd_bus_message_read_strv(reply, &y);
- if (r < 0)
- return r;
-
- *activatable = y;
- y = NULL;
- }
-
- 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);
-}
-
-static int bus_get_owner_kdbus(
- sd_bus *bus,
- const char *name,
- uint64_t mask,
- sd_bus_creds **creds) {
-
- _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 = 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;
-
- cmd->size = size;
- r = ioctl(bus->input_fd, KDBUS_CMD_CONN_INFO, cmd);
- if (r < 0)
- return -errno;
-
- 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;
- }
-
- 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 = (uid_t) item->creds.uid;
- c->pid = (pid_t) item->creds.pid;
- c->gid = (gid_t) item->creds.gid;
- c->mask |= m;
- }
-
- if (mask & SD_BUS_CREDS_TID && item->creds.tid > 0) {
- c->tid = (pid_t) 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;
- }
- }
-
- if (creds) {
- *creds = c;
- c = NULL;
- }
-
- r = 0;
-
-fail:
- ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd->offset);
- return r;
-}
-
-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;
-
- /* 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_message_read(reply_unique, "s", &unique);
- if (r < 0)
- return r;
- }
-
- if (mask != 0) {
- c = bus_creds_new();
- if (!c)
- return -ENOMEM;
-
- if ((mask & SD_BUS_CREDS_UNIQUE_NAME) && unique) {
- c->unique_name = strdup(unique);
- if (!c->unique_name)
- 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;
-
- 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;
-}
-
-_public_ int sd_bus_get_owner(
- sd_bus *bus,
- const char *name,
- uint64_t mask,
- sd_bus_creds **creds) {
-
- 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);
-
- if (bus->is_kernel)
- return bus_get_owner_kdbus(bus, name, mask, creds);
- else
- return bus_get_owner_dbus1(bus, name, mask, creds);
-}
-
-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 → KDBUS_ITEM_NAME_ADD
- * WELLKNOWN, UNIQUE, "" → KDBUS_ITEM_NAME_REMOVE
- * WELLKNOWN, UNIQUE, UNIQUE → KDBUS_ITEM_NAME_CHANGE
- * UNIQUE, "", UNIQUE → KDBUS_ITEM_ID_ADD
- * UNIQUE, UNIQUE, "" → 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;
- }
- }
-
- return 0;
-}
-
-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;
-
- assert(bus);
-
- 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];
-
- 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 -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 */
-
- r = add_name_change_match(bus, cookie, name_change_arg[0], name_change_arg[1], name_change_arg[2]);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-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,
- NULL,
- "s",
- 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,
- NULL,
- "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);
-}
~ianmdlvl / elogind.git / blobdiff