+++ /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 "capability.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 *n;
- size_t size, l;
- int r;
-
- assert(bus);
- assert(name);
-
- l = strlen(name) + 1;
- size = offsetof(struct kdbus_cmd, items) + KDBUS_ITEM_SIZE(l);
- n = alloca0_align(size, 8);
- n->size = size;
- n->flags = request_name_flags_to_kdbus(flags);
-
- n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;
- n->items[0].type = KDBUS_ITEM_NAME;
- memcpy(n->items[0].str, name, l);
-
-#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->return_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_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);
-
- /* Don't allow requesting the special driver and local names */
- if (STR_IN_SET(name, "org.freedesktop.DBus", "org.freedesktop.DBus.Local"))
- return -EINVAL;
-
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
-
- 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 *n;
- size_t size, l;
- int r;
-
- assert(bus);
- assert(name);
-
- l = strlen(name) + 1;
- size = offsetof(struct kdbus_cmd, items) + KDBUS_ITEM_SIZE(l);
- n = alloca0_align(size, 8);
- n->size = size;
-
- n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;
- n->items[0].type = KDBUS_ITEM_NAME;
- memcpy(n->items[0].str, name, l);
-
-#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 0;
-}
-
-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_pid_changed(bus), -ECHILD);
- assert_return(service_name_is_valid(name), -EINVAL);
- assert_return(name[0] != ':', -EINVAL);
-
- /* Don't allow releasing the special driver and local names */
- if (STR_IN_SET(name, "org.freedesktop.DBus", "org.freedesktop.DBus.Local"))
- return -EINVAL;
-
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
-
- 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_list cmd = {
- .size = sizeof(cmd),
- .flags = flags,
- };
- struct kdbus_info *name_list, *name;
- uint64_t previous_id = 0;
- int r;
-
- /* Caller will free half-constructed list on failure... */
-
- r = ioctl(bus->input_fd, KDBUS_CMD_LIST, &cmd);
- if (r < 0)
- return -errno;
-
- name_list = (struct kdbus_info *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);
-
- KDBUS_FOREACH(name, name_list, cmd.list_size) {
-
- struct kdbus_item *item;
- const char *entry_name = NULL;
-
- if ((flags & KDBUS_LIST_UNIQUE) && name->id != previous_id) {
- char *n;
-
- if (asprintf(&n, ":1.%llu", (unsigned long long) name->id) < 0) {
- r = -ENOMEM;
- goto fail;
- }
-
- r = strv_consume(x, n);
- if (r < 0)
- goto fail;
-
- previous_id = name->id;
- }
-
- KDBUS_ITEM_FOREACH(item, name, items)
- if (item->type == KDBUS_ITEM_OWNED_NAME)
- entry_name = item->name.name;
-
- if (entry_name && service_name_is_valid(entry_name)) {
- r = strv_extend(x, entry_name);
- if (r < 0) {
- r = -ENOMEM;
- goto fail;
- }
- }
- }
-
- r = 0;
-
-fail:
- bus_kernel_cmd_free(bus, cmd.offset);
- return r;
-}
-
-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_LIST_UNIQUE | KDBUS_LIST_NAMES, &x);
- if (r < 0)
- return r;
- }
-
- if (activatable) {
- r = kernel_get_list(bus, KDBUS_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_pid_changed(bus), -ECHILD);
-
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
-
- if (bus->is_kernel)
- return bus_list_names_kernel(bus, acquired, activatable);
- else
- return bus_list_names_dbus1(bus, acquired, activatable);
-}
-
-static int bus_populate_creds_from_items(
- sd_bus *bus,
- struct kdbus_info *info,
- uint64_t mask,
- sd_bus_creds *c) {
-
- struct kdbus_item *item;
- uint64_t m;
- int r;
-
- assert(bus);
- assert(info);
- assert(c);
-
- KDBUS_ITEM_FOREACH(item, info, items) {
-
- switch (item->type) {
-
- case KDBUS_ITEM_PIDS:
-
- if (mask & SD_BUS_CREDS_PID && item->pids.pid > 0) {
- c->pid = (pid_t) item->pids.pid;
- c->mask |= SD_BUS_CREDS_PID;
- }
-
- if (mask & SD_BUS_CREDS_TID && item->pids.tid > 0) {
- c->tid = (pid_t) item->pids.tid;
- c->mask |= SD_BUS_CREDS_TID;
- }
-
- break;
-
- case KDBUS_ITEM_CREDS:
-
- if (mask & SD_BUS_CREDS_UID && (uid_t) item->creds.uid != UID_INVALID) {
- c->uid = (uid_t) item->creds.uid;
- c->mask |= SD_BUS_CREDS_UID;
- }
-
- if (mask & SD_BUS_CREDS_EUID && (uid_t) item->creds.euid != UID_INVALID) {
- c->euid = (uid_t) item->creds.euid;
- c->mask |= SD_BUS_CREDS_EUID;
- }
-
- if (mask & SD_BUS_CREDS_SUID && (uid_t) item->creds.suid != UID_INVALID) {
- c->suid = (uid_t) item->creds.suid;
- c->mask |= SD_BUS_CREDS_SUID;
- }
-
- if (mask & SD_BUS_CREDS_FSUID && (uid_t) item->creds.fsuid != UID_INVALID) {
- c->fsuid = (uid_t) item->creds.fsuid;
- c->mask |= SD_BUS_CREDS_FSUID;
- }
-
- if (mask & SD_BUS_CREDS_GID && (gid_t) item->creds.gid != GID_INVALID) {
- c->gid = (gid_t) item->creds.gid;
- c->mask |= SD_BUS_CREDS_GID;
- }
-
- if (mask & SD_BUS_CREDS_EGID && (gid_t) item->creds.egid != GID_INVALID) {
- c->egid = (gid_t) item->creds.egid;
- c->mask |= SD_BUS_CREDS_EGID;
- }
-
- if (mask & SD_BUS_CREDS_SGID && (gid_t) item->creds.sgid != GID_INVALID) {
- c->sgid = (gid_t) item->creds.sgid;
- c->mask |= SD_BUS_CREDS_SGID;
- }
-
- if (mask & SD_BUS_CREDS_FSGID && (gid_t) item->creds.fsgid != GID_INVALID) {
- c->fsgid = (gid_t) item->creds.fsgid;
- c->mask |= SD_BUS_CREDS_FSGID;
- }
-
- break;
-
- case KDBUS_ITEM_PID_COMM:
- if (mask & SD_BUS_CREDS_COMM) {
- r = free_and_strdup(&c->comm, item->str);
- if (r < 0)
- return r;
-
- c->mask |= SD_BUS_CREDS_COMM;
- }
- break;
-
- case KDBUS_ITEM_TID_COMM:
- if (mask & SD_BUS_CREDS_TID_COMM) {
- r = free_and_strdup(&c->tid_comm, item->str);
- if (r < 0)
- return r;
-
- c->mask |= SD_BUS_CREDS_TID_COMM;
- }
- break;
-
- case KDBUS_ITEM_EXE:
- if (mask & SD_BUS_CREDS_EXE) {
- r = free_and_strdup(&c->exe, item->str);
- if (r < 0)
- return r;
-
- c->mask |= SD_BUS_CREDS_EXE;
- }
- break;
-
- case KDBUS_ITEM_CMDLINE:
- if (mask & SD_BUS_CREDS_CMDLINE) {
- c->cmdline_size = item->size - offsetof(struct kdbus_item, data);
- c->cmdline = memdup(item->data, c->cmdline_size);
- if (!c->cmdline)
- return -ENOMEM;
-
- 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) {
- r = free_and_strdup(&c->cgroup, item->str);
- if (r < 0)
- return r;
-
- r = bus_get_root_path(bus);
- if (r < 0)
- return r;
-
- r = free_and_strdup(&c->cgroup_root, bus->cgroup_root);
- if (r < 0)
- return r;
-
- 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) {
- if (item->caps.last_cap != cap_last_cap() ||
- item->size - offsetof(struct kdbus_item, caps.caps) < DIV_ROUND_UP(item->caps.last_cap, 32U) * 4 * 4)
- return -EBADMSG;
-
- c->capability = memdup(item->caps.caps, item->size - offsetof(struct kdbus_item, caps.caps));
- if (!c->capability)
- return -ENOMEM;
-
- c->mask |= m;
- }
- break;
-
- case KDBUS_ITEM_SECLABEL:
- if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
- r = free_and_strdup(&c->label, item->str);
- if (r < 0)
- return r;
-
- c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
- }
- break;
-
- case KDBUS_ITEM_AUDIT:
- if (mask & SD_BUS_CREDS_AUDIT_SESSION_ID && (uint32_t) item->audit.sessionid != (uint32_t) -1) {
- c->audit_session_id = (uint32_t) item->audit.sessionid;
- c->mask |= SD_BUS_CREDS_AUDIT_SESSION_ID;
- }
-
- if (mask & SD_BUS_CREDS_AUDIT_LOGIN_UID && (uid_t) item->audit.loginuid != UID_INVALID) {
- c->audit_login_uid = (uid_t) item->audit.loginuid;
- c->mask |= SD_BUS_CREDS_AUDIT_LOGIN_UID;
- }
- break;
-
- case KDBUS_ITEM_OWNED_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)
- return r;
-
- c->mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES;
- }
- break;
-
- case KDBUS_ITEM_CONN_DESCRIPTION:
- if (mask & SD_BUS_CREDS_DESCRIPTION) {
- r = free_and_strdup(&c->description, item->str);
- if (r < 0)
- return r;
-
- c->mask |= SD_BUS_CREDS_DESCRIPTION;
- }
- break;
-
- case KDBUS_ITEM_AUXGROUPS:
- if (mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) {
- size_t i, n;
- uid_t *g;
-
- n = (item->size - offsetof(struct kdbus_item, data64)) / sizeof(uint64_t);
- g = new(gid_t, n);
- if (!g)
- return -ENOMEM;
-
- for (i = 0; i < n; i++)
- g[i] = item->data64[i];
-
- free(c->supplementary_gids);
- c->supplementary_gids = g;
- c->n_supplementary_gids = n;
-
- c->mask |= SD_BUS_CREDS_SUPPLEMENTARY_GIDS;
- }
- break;
- }
- }
-
- return 0;
-}
-
-int bus_get_name_creds_kdbus(
- sd_bus *bus,
- const char *name,
- uint64_t mask,
- bool allow_activator,
- sd_bus_creds **creds) {
-
- _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
- struct kdbus_cmd_info *cmd;
- struct kdbus_info *conn_info;
- size_t size, l;
- uint64_t id;
- int r;
-
- if (streq(name, "org.freedesktop.DBus"))
- return -EOPNOTSUPP;
-
- r = bus_kernel_parse_unique_name(name, &id);
- if (r < 0)
- return r;
- if (r > 0) {
- size = offsetof(struct kdbus_cmd_info, items);
- cmd = alloca0_align(size, 8);
- cmd->id = id;
- } else {
- l = strlen(name) + 1;
- size = offsetof(struct kdbus_cmd_info, items) + KDBUS_ITEM_SIZE(l);
- cmd = alloca0_align(size, 8);
- cmd->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;
- cmd->items[0].type = KDBUS_ITEM_NAME;
- memcpy(cmd->items[0].str, name, l);
- }
-
- /* If augmentation is on, and the bus didn't provide us
- * the bits we want, then ask for the PID/TID so that we
- * can read the rest from /proc. */
- if ((mask & SD_BUS_CREDS_AUGMENT) &&
- (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID|
- SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID|
- SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_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_SELINUX_CONTEXT|
- SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)))
- mask |= SD_BUS_CREDS_PID;
-
- cmd->size = size;
- cmd->attach_flags = attach_flags_to_kdbus(mask);
-
- r = ioctl(bus->input_fd, KDBUS_CMD_CONN_INFO, cmd);
- if (r < 0)
- return -errno;
-
- conn_info = (struct kdbus_info *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);
-
- /* Non-activated names are considered not available */
- if (!allow_activator && (conn_info->flags & KDBUS_HELLO_ACTIVATOR)) {
- if (name[0] == ':')
- r = -ENXIO;
- else
- r = -ESRCH;
- goto fail;
- }
-
- c = bus_creds_new();
- if (!c) {
- r = -ENOMEM;
- goto fail;
- }
-
- if (mask & SD_BUS_CREDS_UNIQUE_NAME) {
- if (asprintf(&c->unique_name, ":1.%llu", (unsigned long long) conn_info->id) < 0) {
- r = -ENOMEM;
- goto fail;
- }
-
- c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
- }
-
- /* If KDBUS_ITEM_OWNED_NAME is requested then we'll get 0 of
- them in case the service has no names. This does not mean
- however that the list of owned names could not be
- acquired. Hence, let's explicitly clarify that the data is
- complete. */
- c->mask |= mask & SD_BUS_CREDS_WELL_KNOWN_NAMES;
-
- r = bus_populate_creds_from_items(bus, conn_info, mask, c);
- if (r < 0)
- goto fail;
-
- r = bus_creds_add_more(c, mask, 0, 0);
- if (r < 0)
- goto fail;
-
- if (creds) {
- *creds = c;
- c = NULL;
- }
-
- r = 0;
-
-fail:
- bus_kernel_cmd_free(bus, cmd->offset);
- return r;
-}
-
-static int bus_get_name_creds_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) ||
- ((mask & SD_BUS_CREDS_AUGMENT) &&
- (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID|
- SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID|
- 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_SELINUX_CONTEXT|
- 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_EUID) {
- 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->euid = u;
- c->mask |= SD_BUS_CREDS_EUID;
-
- reply = sd_bus_message_unref(reply);
- }
-
- if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- const void *p = NULL;
- size_t sz = 0;
-
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/org/freedesktop/DBus",
- "org.freedesktop.DBus",
- "GetConnectionSELinuxSecurityContext",
- &error,
- &reply,
- "s",
- unique ? unique : name);
- if (r < 0) {
- if (!sd_bus_error_has_name(&error, "org.freedesktop.DBus.Error.SELinuxSecurityContextUnknown"))
- return r;
- } else {
- 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_name_creds(
- 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_AUGMENT) <= _SD_BUS_CREDS_ALL, -EOPNOTSUPP);
- assert_return(mask == 0 || creds, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
- assert_return(service_name_is_valid(name), -EINVAL);
- assert_return(bus->bus_client, -ENODATA);
-
- if (streq(name, "org.freedesktop.DBus.Local"))
- return -EINVAL;
-
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
-
- if (bus->is_kernel)
- return bus_get_name_creds_kdbus(bus, name, mask, false, creds);
- else
- return bus_get_name_creds_dbus1(bus, name, mask, creds);
-}
-
-static int bus_get_owner_creds_kdbus(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) {
- _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
- struct kdbus_cmd_info cmd = {
- .size = sizeof(struct kdbus_cmd_info),
- };
- struct kdbus_info *creator_info;
- pid_t pid = 0;
- int r;
-
- c = bus_creds_new();
- if (!c)
- return -ENOMEM;
-
- /* If augmentation is on, and the bus doesn't didn't allow us
- * to get the bits we want, then ask for the PID/TID so that we
- * can read the rest from /proc. */
- if ((mask & SD_BUS_CREDS_AUGMENT) &&
- (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID|
- SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID|
- SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_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_SELINUX_CONTEXT|
- SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)))
- mask |= SD_BUS_CREDS_PID;
-
- cmd.attach_flags = attach_flags_to_kdbus(mask);
-
- r = ioctl(bus->input_fd, KDBUS_CMD_BUS_CREATOR_INFO, &cmd);
- if (r < 0)
- return -errno;
-
- creator_info = (struct kdbus_info *) ((uint8_t *) bus->kdbus_buffer + cmd.offset);
-
- r = bus_populate_creds_from_items(bus, creator_info, mask, c);
- bus_kernel_cmd_free(bus, cmd.offset);
- if (r < 0)
- return r;
-
- r = bus_creds_add_more(c, mask, pid, 0);
- if (r < 0)
- return r;
-
- *ret = c;
- c = NULL;
- return 0;
-}
-
-static int bus_get_owner_creds_dbus1(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) {
- _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
- pid_t pid = 0;
- int r;
-
- if (!bus->ucred_valid && !isempty(bus->label))
- return -ENODATA;
-
- c = bus_creds_new();
- if (!c)
- return -ENOMEM;
-
- if (bus->ucred_valid) {
- if (bus->ucred.pid > 0) {
- pid = c->pid = bus->ucred.pid;
- c->mask |= SD_BUS_CREDS_PID & mask;
- }
-
- if (bus->ucred.uid != UID_INVALID) {
- c->euid = bus->ucred.uid;
- c->mask |= SD_BUS_CREDS_EUID & mask;
- }
-
- if (bus->ucred.gid != GID_INVALID) {
- c->egid = bus->ucred.gid;
- c->mask |= SD_BUS_CREDS_EGID & mask;
- }
- }
-
- if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) {
- c->label = strdup(bus->label);
- 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;
-
- *ret = c;
- c = NULL;
- return 0;
-}
-
-_public_ int sd_bus_get_owner_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) {
- assert_return(bus, -EINVAL);
- assert_return((mask & ~SD_BUS_CREDS_AUGMENT) <= _SD_BUS_CREDS_ALL, -EOPNOTSUPP);
- assert_return(ret, -EINVAL);
- assert_return(!bus_pid_changed(bus), -ECHILD);
-
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
-
- if (bus->is_kernel)
- return bus_get_owner_creds_kdbus(bus, mask, ret);
- else
- return bus_get_owner_creds_dbus1(bus, mask, ret);
-}
-
-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_align(sz, 8);
- 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.id = old_owner_id;
- item->name_change.new_id.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_align(sz, 8);
- 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,
- struct bus_match_component *components,
- unsigned n_components,
- uint64_t cookie) {
-
- struct kdbus_cmd_match *m;
- struct kdbus_item *item;
- uint64_t *bloom;
- 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);
-
- /* Monitor streams don't support matches, make this a NOP */
- if (bus->hello_flags & KDBUS_HELLO_MONITOR)
- return 0;
-
- bloom = alloca0(bus->bloom_size);
-
- 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, bus->bloom_size, bus->bloom_n_hash, "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, bus->bloom_size, bus->bloom_n_hash, "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, bus->bloom_size, bus->bloom_n_hash, "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, bus->bloom_size, bus->bloom_n_hash, "path", c->value_str);
- using_bloom = true;
- break;
-
- case BUS_MATCH_PATH_NAMESPACE:
- if (!streq(c->value_str, "/")) {
- bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, "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;
-
- xsprintf(buf, "arg%i", c->type - BUS_MATCH_ARG);
- bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, 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")];
-
- xsprintf(buf, "arg%i-slash-prefix", c->type - BUS_MATCH_ARG_PATH);
- bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, 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")];
-
- xsprintf(buf, "arg%i-dot-prefix", c->type - BUS_MATCH_ARG_NAMESPACE);
- bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, 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) + bus->bloom_size);
-
- m = alloca0_align(sz, 8);
- m->size = sz;
- m->cookie = cookie;
-
- 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) + bus->bloom_size;
- item->type = KDBUS_ITEM_BLOOM_MASK;
- memcpy(item->data64, bloom, bus->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;
-}
-
-#define internal_match(bus, m) \
- ((bus)->hello_flags & KDBUS_HELLO_MONITOR \
- ? (isempty(m) ? "eavesdrop='true'" : strjoina((m), ",eavesdrop='true'")) \
- : (m))
-
-static int bus_add_match_internal_dbus1(
- sd_bus *bus,
- const char *match) {
-
- const char *e;
-
- assert(bus);
- assert(match);
-
- e = internal_match(bus, match);
-
- return sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/org/freedesktop/DBus",
- "org.freedesktop.DBus",
- "AddMatch",
- NULL,
- NULL,
- "s",
- e);
-}
-
-int bus_add_match_internal(
- sd_bus *bus,
- const char *match,
- struct bus_match_component *components,
- unsigned n_components,
- uint64_t cookie) {
-
- assert(bus);
-
- if (bus->is_kernel)
- return bus_add_match_internal_kernel(bus, components, n_components, cookie);
- else
- return bus_add_match_internal_dbus1(bus, match);
-}
-
-int bus_remove_match_internal_kernel(
- sd_bus *bus,
- uint64_t cookie) {
-
- struct kdbus_cmd_match m = {
- .size = offsetof(struct kdbus_cmd_match, items),
- .cookie = cookie,
- };
- int r;
-
- assert(bus);
-
- /* Monitor streams don't support matches, make this a NOP */
- if (bus->hello_flags & KDBUS_HELLO_MONITOR)
- return 0;
-
- 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) {
-
- const char *e;
-
- assert(bus);
- assert(match);
-
- e = internal_match(bus, match);
-
- return sd_bus_call_method(
- bus,
- "org.freedesktop.DBus",
- "/org/freedesktop/DBus",
- "org.freedesktop.DBus",
- "RemoveMatch",
- NULL,
- NULL,
- "s",
- e);
-}
-
-int bus_remove_match_internal(
- sd_bus *bus,
- const char *match,
- uint64_t cookie) {
-
- assert(bus);
-
- if (bus->is_kernel)
- return bus_remove_match_internal_kernel(bus, cookie);
- else
- return bus_remove_match_internal_dbus1(bus, match);
-}
-
-_public_ int sd_bus_get_name_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_pid_changed(bus), -ECHILD);
- assert_return(service_name_is_valid(name), -EINVAL);
-
- if (!BUS_IS_OPEN(bus->state))
- return -ENOTCONN;
-
- if (streq_ptr(name, bus->unique_name))
- return sd_id128_get_machine(machine);
-
- r = sd_bus_message_new_method_call(
- bus,
- &m,
- name,
- "/",
- "org.freedesktop.DBus.Peer",
- "GetMachineId");
- if (r < 0)
- return r;
-
- r = sd_bus_message_set_auto_start(m, false);
- 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