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-rw-r--r--src/shared/bus-util.c2060
1 files changed, 2060 insertions, 0 deletions
diff --git a/src/shared/bus-util.c b/src/shared/bus-util.c
new file mode 100644
index 0000000000..8fcc289957
--- /dev/null
+++ b/src/shared/bus-util.c
@@ -0,0 +1,2060 @@
+/*-*- 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/>.
+***/
+
+#include <sys/socket.h>
+
+#include "sd-daemon.h"
+#include "sd-event.h"
+#include "util.h"
+#include "strv.h"
+#include "macro.h"
+#include "def.h"
+#include "path-util.h"
+#include "missing.h"
+#include "set.h"
+#include "signal-util.h"
+#include "unit-name.h"
+
+#include "sd-bus.h"
+#include "bus-error.h"
+#include "bus-label.h"
+#include "bus-message.h"
+#include "bus-util.h"
+#include "bus-internal.h"
+
+static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+ sd_event *e = userdata;
+
+ assert(m);
+ assert(e);
+
+ sd_bus_close(sd_bus_message_get_bus(m));
+ sd_event_exit(e, 0);
+
+ return 1;
+}
+
+int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) {
+ _cleanup_free_ char *match = NULL;
+ const char *unique;
+ int r;
+
+ assert(e);
+ assert(bus);
+ assert(name);
+
+ /* We unregister the name here and then wait for the
+ * NameOwnerChanged signal for this event to arrive before we
+ * quit. We do this in order to make sure that any queued
+ * requests are still processed before we really exit. */
+
+ r = sd_bus_get_unique_name(bus, &unique);
+ if (r < 0)
+ return r;
+
+ r = asprintf(&match,
+ "sender='org.freedesktop.DBus',"
+ "type='signal',"
+ "interface='org.freedesktop.DBus',"
+ "member='NameOwnerChanged',"
+ "path='/org/freedesktop/DBus',"
+ "arg0='%s',"
+ "arg1='%s',"
+ "arg2=''", name, unique);
+ if (r < 0)
+ return -ENOMEM;
+
+ r = sd_bus_add_match(bus, NULL, match, name_owner_change_callback, e);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_release_name(bus, name);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int bus_event_loop_with_idle(
+ sd_event *e,
+ sd_bus *bus,
+ const char *name,
+ usec_t timeout,
+ check_idle_t check_idle,
+ void *userdata) {
+ bool exiting = false;
+ int r, code;
+
+ assert(e);
+ assert(bus);
+ assert(name);
+
+ for (;;) {
+ bool idle;
+
+ r = sd_event_get_state(e);
+ if (r < 0)
+ return r;
+ if (r == SD_EVENT_FINISHED)
+ break;
+
+ if (check_idle)
+ idle = check_idle(userdata);
+ else
+ idle = true;
+
+ r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
+ if (r < 0)
+ return r;
+
+ if (r == 0 && !exiting && idle) {
+
+ r = sd_bus_try_close(bus);
+ if (r == -EBUSY)
+ continue;
+
+ /* Fallback for dbus1 connections: we
+ * unregister the name and wait for the
+ * response to come through for it */
+ if (r == -EOPNOTSUPP) {
+
+ /* Inform the service manager that we
+ * are going down, so that it will
+ * queue all further start requests,
+ * instead of assuming we are already
+ * running. */
+ sd_notify(false, "STOPPING=1");
+
+ r = bus_async_unregister_and_exit(e, bus, name);
+ if (r < 0)
+ return r;
+
+ exiting = true;
+ continue;
+ }
+
+ if (r < 0)
+ return r;
+
+ sd_event_exit(e, 0);
+ break;
+ }
+ }
+
+ r = sd_event_get_exit_code(e, &code);
+ if (r < 0)
+ return r;
+
+ return code;
+}
+
+int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) {
+ _cleanup_bus_message_unref_ sd_bus_message *rep = NULL;
+ int r, has_owner = 0;
+
+ assert(c);
+ assert(name);
+
+ r = sd_bus_call_method(c,
+ "org.freedesktop.DBus",
+ "/org/freedesktop/dbus",
+ "org.freedesktop.DBus",
+ "NameHasOwner",
+ error,
+ &rep,
+ "s",
+ name);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read_basic(rep, 'b', &has_owner);
+ if (r < 0)
+ return sd_bus_error_set_errno(error, r);
+
+ return has_owner;
+}
+
+static int check_good_user(sd_bus_message *m, uid_t good_user) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ uid_t sender_uid;
+ int r;
+
+ assert(m);
+
+ if (good_user == UID_INVALID)
+ return 0;
+
+ r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_EUID, &creds);
+ if (r < 0)
+ return r;
+
+ /* Don't trust augmented credentials for authorization */
+ assert_return((sd_bus_creds_get_augmented_mask(creds) & SD_BUS_CREDS_EUID) == 0, -EPERM);
+
+ r = sd_bus_creds_get_euid(creds, &sender_uid);
+ if (r < 0)
+ return r;
+
+ return sender_uid == good_user;
+}
+
+int bus_test_polkit(
+ sd_bus_message *call,
+ int capability,
+ const char *action,
+ uid_t good_user,
+ bool *_challenge,
+ sd_bus_error *e) {
+
+ int r;
+
+ assert(call);
+ assert(action);
+
+ /* Tests non-interactively! */
+
+ r = check_good_user(call, good_user);
+ if (r != 0)
+ return r;
+
+ r = sd_bus_query_sender_privilege(call, capability);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ return 1;
+#ifdef ENABLE_POLKIT
+ else {
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ int authorized = false, challenge = false;
+ const char *sender;
+
+ sender = sd_bus_message_get_sender(call);
+ if (!sender)
+ return -EBADMSG;
+
+ r = sd_bus_call_method(
+ call->bus,
+ "org.freedesktop.PolicyKit1",
+ "/org/freedesktop/PolicyKit1/Authority",
+ "org.freedesktop.PolicyKit1.Authority",
+ "CheckAuthorization",
+ e,
+ &reply,
+ "(sa{sv})sa{ss}us",
+ "system-bus-name", 1, "name", "s", sender,
+ action,
+ 0,
+ 0,
+ "");
+
+ if (r < 0) {
+ /* Treat no PK available as access denied */
+ if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN)) {
+ sd_bus_error_free(e);
+ return -EACCES;
+ }
+
+ return r;
+ }
+
+ r = sd_bus_message_enter_container(reply, 'r', "bba{ss}");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(reply, "bb", &authorized, &challenge);
+ if (r < 0)
+ return r;
+
+ if (authorized)
+ return 1;
+
+ if (_challenge) {
+ *_challenge = challenge;
+ return 0;
+ }
+ }
+#endif
+
+ return -EACCES;
+}
+
+#ifdef ENABLE_POLKIT
+
+typedef struct AsyncPolkitQuery {
+ sd_bus_message *request, *reply;
+ sd_bus_message_handler_t callback;
+ void *userdata;
+ sd_bus_slot *slot;
+ Hashmap *registry;
+} AsyncPolkitQuery;
+
+static void async_polkit_query_free(AsyncPolkitQuery *q) {
+
+ if (!q)
+ return;
+
+ sd_bus_slot_unref(q->slot);
+
+ if (q->registry && q->request)
+ hashmap_remove(q->registry, q->request);
+
+ sd_bus_message_unref(q->request);
+ sd_bus_message_unref(q->reply);
+
+ free(q);
+}
+
+static int async_polkit_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) {
+ _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
+ AsyncPolkitQuery *q = userdata;
+ int r;
+
+ assert(reply);
+ assert(q);
+
+ q->slot = sd_bus_slot_unref(q->slot);
+ q->reply = sd_bus_message_ref(reply);
+
+ r = sd_bus_message_rewind(q->request, true);
+ if (r < 0) {
+ r = sd_bus_reply_method_errno(q->request, r, NULL);
+ goto finish;
+ }
+
+ r = q->callback(q->request, q->userdata, &error_buffer);
+ r = bus_maybe_reply_error(q->request, r, &error_buffer);
+
+finish:
+ async_polkit_query_free(q);
+
+ return r;
+}
+
+#endif
+
+int bus_verify_polkit_async(
+ sd_bus_message *call,
+ int capability,
+ const char *action,
+ bool interactive,
+ uid_t good_user,
+ Hashmap **registry,
+ sd_bus_error *error) {
+
+#ifdef ENABLE_POLKIT
+ _cleanup_bus_message_unref_ sd_bus_message *pk = NULL;
+ AsyncPolkitQuery *q;
+ const char *sender;
+ sd_bus_message_handler_t callback;
+ void *userdata;
+ int c;
+#endif
+ int r;
+
+ assert(call);
+ assert(action);
+ assert(registry);
+
+ r = check_good_user(call, good_user);
+ if (r != 0)
+ return r;
+
+#ifdef ENABLE_POLKIT
+ q = hashmap_get(*registry, call);
+ if (q) {
+ int authorized, challenge;
+
+ /* This is the second invocation of this function, and
+ * there's already a response from polkit, let's
+ * process it */
+ assert(q->reply);
+
+ if (sd_bus_message_is_method_error(q->reply, NULL)) {
+ const sd_bus_error *e;
+
+ /* Copy error from polkit reply */
+ e = sd_bus_message_get_error(q->reply);
+ sd_bus_error_copy(error, e);
+
+ /* Treat no PK available as access denied */
+ if (sd_bus_error_has_name(e, SD_BUS_ERROR_SERVICE_UNKNOWN))
+ return -EACCES;
+
+ return -sd_bus_error_get_errno(e);
+ }
+
+ r = sd_bus_message_enter_container(q->reply, 'r', "bba{ss}");
+ if (r >= 0)
+ r = sd_bus_message_read(q->reply, "bb", &authorized, &challenge);
+
+ if (r < 0)
+ return r;
+
+ if (authorized)
+ return 1;
+
+ if (challenge)
+ return sd_bus_error_set(error, SD_BUS_ERROR_INTERACTIVE_AUTHORIZATION_REQUIRED, "Interactive authentication required.");
+
+ return -EACCES;
+ }
+#endif
+
+ r = sd_bus_query_sender_privilege(call, capability);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ return 1;
+
+#ifdef ENABLE_POLKIT
+ if (sd_bus_get_current_message(call->bus) != call)
+ return -EINVAL;
+
+ callback = sd_bus_get_current_handler(call->bus);
+ if (!callback)
+ return -EINVAL;
+
+ userdata = sd_bus_get_current_userdata(call->bus);
+
+ sender = sd_bus_message_get_sender(call);
+ if (!sender)
+ return -EBADMSG;
+
+ c = sd_bus_message_get_allow_interactive_authorization(call);
+ if (c < 0)
+ return c;
+ if (c > 0)
+ interactive = true;
+
+ r = hashmap_ensure_allocated(registry, NULL);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_new_method_call(
+ call->bus,
+ &pk,
+ "org.freedesktop.PolicyKit1",
+ "/org/freedesktop/PolicyKit1/Authority",
+ "org.freedesktop.PolicyKit1.Authority",
+ "CheckAuthorization");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(
+ pk,
+ "(sa{sv})sa{ss}us",
+ "system-bus-name", 1, "name", "s", sender,
+ action,
+ 0,
+ !!interactive,
+ NULL);
+ if (r < 0)
+ return r;
+
+ q = new0(AsyncPolkitQuery, 1);
+ if (!q)
+ return -ENOMEM;
+
+ q->request = sd_bus_message_ref(call);
+ q->callback = callback;
+ q->userdata = userdata;
+
+ r = hashmap_put(*registry, call, q);
+ if (r < 0) {
+ async_polkit_query_free(q);
+ return r;
+ }
+
+ q->registry = *registry;
+
+ r = sd_bus_call_async(call->bus, &q->slot, pk, async_polkit_callback, q, 0);
+ if (r < 0) {
+ async_polkit_query_free(q);
+ return r;
+ }
+
+ return 0;
+#endif
+
+ return -EACCES;
+}
+
+void bus_verify_polkit_async_registry_free(Hashmap *registry) {
+#ifdef ENABLE_POLKIT
+ AsyncPolkitQuery *q;
+
+ while ((q = hashmap_steal_first(registry)))
+ async_polkit_query_free(q);
+
+ hashmap_free(registry);
+#endif
+}
+
+int bus_check_peercred(sd_bus *c) {
+ struct ucred ucred;
+ socklen_t l;
+ int fd;
+
+ assert(c);
+
+ fd = sd_bus_get_fd(c);
+ if (fd < 0)
+ return fd;
+
+ l = sizeof(struct ucred);
+ if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
+ return -errno;
+
+ if (l != sizeof(struct ucred))
+ return -E2BIG;
+
+ if (ucred.uid != 0 && ucred.uid != geteuid())
+ return -EPERM;
+
+ return 1;
+}
+
+int bus_open_system_systemd(sd_bus **_bus) {
+ _cleanup_bus_unref_ sd_bus *bus = NULL;
+ int r;
+
+ assert(_bus);
+
+ if (geteuid() != 0)
+ return sd_bus_open_system(_bus);
+
+ /* If we are root and kdbus is not available, then let's talk
+ * directly to the system instance, instead of going via the
+ * bus */
+
+#ifdef ENABLE_KDBUS
+ r = sd_bus_new(&bus);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_set_address(bus, KERNEL_SYSTEM_BUS_ADDRESS);
+ if (r < 0)
+ return r;
+
+ bus->bus_client = true;
+
+ r = sd_bus_start(bus);
+ if (r >= 0) {
+ *_bus = bus;
+ bus = NULL;
+ return 0;
+ }
+
+ bus = sd_bus_unref(bus);
+#endif
+
+ r = sd_bus_new(&bus);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_set_address(bus, "unix:path=/run/systemd/private");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_start(bus);
+ if (r < 0)
+ return sd_bus_open_system(_bus);
+
+ r = bus_check_peercred(bus);
+ if (r < 0)
+ return r;
+
+ *_bus = bus;
+ bus = NULL;
+
+ return 0;
+}
+
+int bus_open_user_systemd(sd_bus **_bus) {
+ _cleanup_bus_unref_ sd_bus *bus = NULL;
+ _cleanup_free_ char *ee = NULL;
+ const char *e;
+ int r;
+
+ /* Try via kdbus first, and then directly */
+
+ assert(_bus);
+
+#ifdef ENABLE_KDBUS
+ r = sd_bus_new(&bus);
+ if (r < 0)
+ return r;
+
+ if (asprintf(&bus->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()) < 0)
+ return -ENOMEM;
+
+ bus->bus_client = true;
+
+ r = sd_bus_start(bus);
+ if (r >= 0) {
+ *_bus = bus;
+ bus = NULL;
+ return 0;
+ }
+
+ bus = sd_bus_unref(bus);
+#endif
+
+ e = secure_getenv("XDG_RUNTIME_DIR");
+ if (!e)
+ return sd_bus_open_user(_bus);
+
+ ee = bus_address_escape(e);
+ if (!ee)
+ return -ENOMEM;
+
+ r = sd_bus_new(&bus);
+ if (r < 0)
+ return r;
+
+ bus->address = strjoin("unix:path=", ee, "/systemd/private", NULL);
+ if (!bus->address)
+ return -ENOMEM;
+
+ r = sd_bus_start(bus);
+ if (r < 0)
+ return sd_bus_open_user(_bus);
+
+ r = bus_check_peercred(bus);
+ if (r < 0)
+ return r;
+
+ *_bus = bus;
+ bus = NULL;
+
+ return 0;
+}
+
+int bus_print_property(const char *name, sd_bus_message *property, bool all) {
+ char type;
+ const char *contents;
+ int r;
+
+ assert(name);
+ assert(property);
+
+ r = sd_bus_message_peek_type(property, &type, &contents);
+ if (r < 0)
+ return r;
+
+ switch (type) {
+
+ case SD_BUS_TYPE_STRING: {
+ const char *s;
+
+ r = sd_bus_message_read_basic(property, type, &s);
+ if (r < 0)
+ return r;
+
+ if (all || !isempty(s)) {
+ _cleanup_free_ char *escaped = NULL;
+
+ escaped = xescape(s, "\n");
+ if (!escaped)
+ return -ENOMEM;
+
+ printf("%s=%s\n", name, escaped);
+ }
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_BOOLEAN: {
+ int b;
+
+ r = sd_bus_message_read_basic(property, type, &b);
+ if (r < 0)
+ return r;
+
+ printf("%s=%s\n", name, yes_no(b));
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_UINT64: {
+ uint64_t u;
+
+ r = sd_bus_message_read_basic(property, type, &u);
+ if (r < 0)
+ return r;
+
+ /* Yes, heuristics! But we can change this check
+ * should it turn out to not be sufficient */
+
+ if (endswith(name, "Timestamp")) {
+ char timestamp[FORMAT_TIMESTAMP_MAX], *t;
+
+ t = format_timestamp(timestamp, sizeof(timestamp), u);
+ if (t || all)
+ printf("%s=%s\n", name, strempty(t));
+
+ } else if (strstr(name, "USec")) {
+ char timespan[FORMAT_TIMESPAN_MAX];
+
+ printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u, 0));
+ } else
+ printf("%s=%llu\n", name, (unsigned long long) u);
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_INT64: {
+ int64_t i;
+
+ r = sd_bus_message_read_basic(property, type, &i);
+ if (r < 0)
+ return r;
+
+ printf("%s=%lld\n", name, (long long) i);
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_UINT32: {
+ uint32_t u;
+
+ r = sd_bus_message_read_basic(property, type, &u);
+ if (r < 0)
+ return r;
+
+ if (strstr(name, "UMask") || strstr(name, "Mode"))
+ printf("%s=%04o\n", name, u);
+ else
+ printf("%s=%u\n", name, (unsigned) u);
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_INT32: {
+ int32_t i;
+
+ r = sd_bus_message_read_basic(property, type, &i);
+ if (r < 0)
+ return r;
+
+ printf("%s=%i\n", name, (int) i);
+ return 1;
+ }
+
+ case SD_BUS_TYPE_DOUBLE: {
+ double d;
+
+ r = sd_bus_message_read_basic(property, type, &d);
+ if (r < 0)
+ return r;
+
+ printf("%s=%g\n", name, d);
+ return 1;
+ }
+
+ case SD_BUS_TYPE_ARRAY:
+ if (streq(contents, "s")) {
+ bool first = true;
+ const char *str;
+
+ r = sd_bus_message_enter_container(property, SD_BUS_TYPE_ARRAY, contents);
+ if (r < 0)
+ return r;
+
+ while((r = sd_bus_message_read_basic(property, SD_BUS_TYPE_STRING, &str)) > 0) {
+ _cleanup_free_ char *escaped = NULL;
+
+ if (first)
+ printf("%s=", name);
+
+ escaped = xescape(str, "\n ");
+ if (!escaped)
+ return -ENOMEM;
+
+ printf("%s%s", first ? "" : " ", escaped);
+
+ first = false;
+ }
+ if (r < 0)
+ return r;
+
+ if (first && all)
+ printf("%s=", name);
+ if (!first || all)
+ puts("");
+
+ r = sd_bus_message_exit_container(property);
+ if (r < 0)
+ return r;
+
+ return 1;
+
+ } else if (streq(contents, "y")) {
+ const uint8_t *u;
+ size_t n;
+
+ r = sd_bus_message_read_array(property, SD_BUS_TYPE_BYTE, (const void**) &u, &n);
+ if (r < 0)
+ return r;
+
+ if (all || n > 0) {
+ unsigned int i;
+
+ printf("%s=", name);
+
+ for (i = 0; i < n; i++)
+ printf("%02x", u[i]);
+
+ puts("");
+ }
+
+ return 1;
+
+ } else if (streq(contents, "u")) {
+ uint32_t *u;
+ size_t n;
+
+ r = sd_bus_message_read_array(property, SD_BUS_TYPE_UINT32, (const void**) &u, &n);
+ if (r < 0)
+ return r;
+
+ if (all || n > 0) {
+ unsigned int i;
+
+ printf("%s=", name);
+
+ for (i = 0; i < n; i++)
+ printf("%08x", u[i]);
+
+ puts("");
+ }
+
+ return 1;
+ }
+
+ break;
+ }
+
+ return 0;
+}
+
+int bus_print_all_properties(sd_bus *bus, const char *dest, const char *path, char **filter, bool all) {
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
+
+ assert(bus);
+ assert(path);
+
+ r = sd_bus_call_method(bus,
+ dest,
+ path,
+ "org.freedesktop.DBus.Properties",
+ "GetAll",
+ &error,
+ &reply,
+ "s", "");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
+ const char *name;
+ const char *contents;
+
+ r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_STRING, &name);
+ if (r < 0)
+ return r;
+
+ if (!filter || strv_find(filter, name)) {
+ r = sd_bus_message_peek_type(reply, NULL, &contents);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);
+ if (r < 0)
+ return r;
+
+ r = bus_print_property(name, reply, all);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ if (all)
+ printf("%s=[unprintable]\n", name);
+ /* skip what we didn't read */
+ r = sd_bus_message_skip(reply, contents);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_exit_container(reply);
+ if (r < 0)
+ return r;
+ } else {
+ r = sd_bus_message_skip(reply, "v");
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_exit_container(reply);
+ if (r < 0)
+ return r;
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(reply);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
+ sd_id128_t *p = userdata;
+ const void *v;
+ size_t n;
+ int r;
+
+ r = sd_bus_message_read_array(m, SD_BUS_TYPE_BYTE, &v, &n);
+ if (r < 0)
+ return r;
+
+ if (n == 0)
+ *p = SD_ID128_NULL;
+ else if (n == 16)
+ memcpy((*p).bytes, v, n);
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
+ char type;
+ int r;
+
+ r = sd_bus_message_peek_type(m, &type, NULL);
+ if (r < 0)
+ return r;
+
+ switch (type) {
+ case SD_BUS_TYPE_STRING: {
+ const char *s;
+ char **p = userdata;
+
+ r = sd_bus_message_read_basic(m, type, &s);
+ if (r < 0)
+ break;
+
+ if (isempty(s))
+ break;
+
+ r = free_and_strdup(p, s);
+ break;
+ }
+
+ case SD_BUS_TYPE_ARRAY: {
+ _cleanup_strv_free_ char **l = NULL;
+ char ***p = userdata;
+
+ r = bus_message_read_strv_extend(m, &l);
+ if (r < 0)
+ break;
+
+ strv_free(*p);
+ *p = l;
+ l = NULL;
+
+ break;
+ }
+
+ case SD_BUS_TYPE_BOOLEAN: {
+ unsigned b;
+ bool *p = userdata;
+
+ r = sd_bus_message_read_basic(m, type, &b);
+ if (r < 0)
+ break;
+
+ *p = b;
+
+ break;
+ }
+
+ case SD_BUS_TYPE_UINT32: {
+ uint64_t u;
+ uint32_t *p = userdata;
+
+ r = sd_bus_message_read_basic(m, type, &u);
+ if (r < 0)
+ break;
+
+ *p = u;
+
+ break;
+ }
+
+ case SD_BUS_TYPE_UINT64: {
+ uint64_t t;
+ uint64_t *p = userdata;
+
+ r = sd_bus_message_read_basic(m, type, &t);
+ if (r < 0)
+ break;
+
+ *p = t;
+
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ return r;
+}
+
+int bus_message_map_all_properties(
+ sd_bus_message *m,
+ const struct bus_properties_map *map,
+ void *userdata) {
+
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
+
+ assert(m);
+ assert(map);
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
+ const struct bus_properties_map *prop;
+ const char *member;
+ const char *contents;
+ void *v;
+ unsigned i;
+
+ r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member);
+ if (r < 0)
+ return r;
+
+ for (i = 0, prop = NULL; map[i].member; i++)
+ if (streq(map[i].member, member)) {
+ prop = &map[i];
+ break;
+ }
+
+ if (prop) {
+ r = sd_bus_message_peek_type(m, NULL, &contents);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, contents);
+ if (r < 0)
+ return r;
+
+ v = (uint8_t *)userdata + prop->offset;
+ if (map[i].set)
+ r = prop->set(sd_bus_message_get_bus(m), member, m, &error, v);
+ else
+ r = map_basic(sd_bus_message_get_bus(m), member, m, &error, v);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+ } else {
+ r = sd_bus_message_skip(m, "v");
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+ }
+ if (r < 0)
+ return r;
+
+ return sd_bus_message_exit_container(m);
+}
+
+int bus_message_map_properties_changed(
+ sd_bus_message *m,
+ const struct bus_properties_map *map,
+ void *userdata) {
+
+ const char *member;
+ int r, invalidated, i;
+
+ assert(m);
+ assert(map);
+
+ r = bus_message_map_all_properties(m, map, userdata);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "s");
+ if (r < 0)
+ return r;
+
+ invalidated = 0;
+ while ((r = sd_bus_message_read_basic(m, SD_BUS_TYPE_STRING, &member)) > 0)
+ for (i = 0; map[i].member; i++)
+ if (streq(map[i].member, member)) {
+ ++invalidated;
+ break;
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ return invalidated;
+}
+
+int bus_map_all_properties(
+ sd_bus *bus,
+ const char *destination,
+ const char *path,
+ const struct bus_properties_map *map,
+ void *userdata) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
+
+ assert(bus);
+ assert(destination);
+ assert(path);
+ assert(map);
+
+ r = sd_bus_call_method(
+ bus,
+ destination,
+ path,
+ "org.freedesktop.DBus.Properties",
+ "GetAll",
+ &error,
+ &m,
+ "s", "");
+ if (r < 0)
+ return r;
+
+ return bus_message_map_all_properties(m, map, userdata);
+}
+
+int bus_open_transport(BusTransport transport, const char *host, bool user, sd_bus **bus) {
+ int r;
+
+ assert(transport >= 0);
+ assert(transport < _BUS_TRANSPORT_MAX);
+ assert(bus);
+
+ assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
+ assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
+
+ switch (transport) {
+
+ case BUS_TRANSPORT_LOCAL:
+ if (user)
+ r = sd_bus_default_user(bus);
+ else
+ r = sd_bus_default_system(bus);
+
+ break;
+
+ case BUS_TRANSPORT_REMOTE:
+ r = sd_bus_open_system_remote(bus, host);
+ break;
+
+ case BUS_TRANSPORT_MACHINE:
+ r = sd_bus_open_system_machine(bus, host);
+ break;
+
+ default:
+ assert_not_reached("Hmm, unknown transport type.");
+ }
+
+ return r;
+}
+
+int bus_open_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) {
+ int r;
+
+ assert(transport >= 0);
+ assert(transport < _BUS_TRANSPORT_MAX);
+ assert(bus);
+
+ assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL);
+ assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP);
+
+ switch (transport) {
+
+ case BUS_TRANSPORT_LOCAL:
+ if (user)
+ r = bus_open_user_systemd(bus);
+ else
+ r = bus_open_system_systemd(bus);
+
+ break;
+
+ case BUS_TRANSPORT_REMOTE:
+ r = sd_bus_open_system_remote(bus, host);
+ break;
+
+ case BUS_TRANSPORT_MACHINE:
+ r = sd_bus_open_system_machine(bus, host);
+ break;
+
+ default:
+ assert_not_reached("Hmm, unknown transport type.");
+ }
+
+ return r;
+}
+
+int bus_property_get_bool(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ int b = *(bool*) userdata;
+
+ return sd_bus_message_append_basic(reply, 'b', &b);
+}
+
+#if __SIZEOF_SIZE_T__ != 8
+int bus_property_get_size(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ uint64_t sz = *(size_t*) userdata;
+
+ return sd_bus_message_append_basic(reply, 't', &sz);
+}
+#endif
+
+#if __SIZEOF_LONG__ != 8
+int bus_property_get_long(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ int64_t l = *(long*) userdata;
+
+ return sd_bus_message_append_basic(reply, 'x', &l);
+}
+
+int bus_property_get_ulong(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ uint64_t ul = *(unsigned long*) userdata;
+
+ return sd_bus_message_append_basic(reply, 't', &ul);
+}
+#endif
+
+int bus_log_parse_error(int r) {
+ return log_error_errno(r, "Failed to parse bus message: %m");
+}
+
+int bus_log_create_error(int r) {
+ return log_error_errno(r, "Failed to create bus message: %m");
+}
+
+int bus_parse_unit_info(sd_bus_message *message, UnitInfo *u) {
+ assert(message);
+ assert(u);
+
+ u->machine = NULL;
+
+ return sd_bus_message_read(
+ message,
+ "(ssssssouso)",
+ &u->id,
+ &u->description,
+ &u->load_state,
+ &u->active_state,
+ &u->sub_state,
+ &u->following,
+ &u->unit_path,
+ &u->job_id,
+ &u->job_type,
+ &u->job_path);
+}
+
+int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignment) {
+ const char *eq, *field;
+ int r;
+
+ assert(m);
+ assert(assignment);
+
+ eq = strchr(assignment, '=');
+ if (!eq) {
+ log_error("Not an assignment: %s", assignment);
+ return -EINVAL;
+ }
+
+ field = strndupa(assignment, eq - assignment);
+ eq ++;
+
+ if (streq(field, "CPUQuota")) {
+
+ if (isempty(eq)) {
+
+ r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "CPUQuotaPerSecUSec");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append(m, "v", "t", USEC_INFINITY);
+
+ } else if (endswith(eq, "%")) {
+ double percent;
+
+ if (sscanf(eq, "%lf%%", &percent) != 1 || percent <= 0) {
+ log_error("CPU quota '%s' invalid.", eq);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "CPUQuotaPerSecUSec");
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ r = sd_bus_message_append(m, "v", "t", (usec_t) percent * USEC_PER_SEC / 100);
+ } else {
+ log_error("CPU quota needs to be in percent.");
+ return -EINVAL;
+ }
+
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ return 0;
+ }
+
+ r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, field);
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ if (STR_IN_SET(field,
+ "CPUAccounting", "MemoryAccounting", "BlockIOAccounting",
+ "SendSIGHUP", "SendSIGKILL", "WakeSystem", "DefaultDependencies")) {
+
+ r = parse_boolean(eq);
+ if (r < 0) {
+ log_error("Failed to parse boolean assignment %s.", assignment);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append(m, "v", "b", r);
+
+ } else if (streq(field, "MemoryLimit")) {
+ off_t bytes;
+
+ r = parse_size(eq, 1024, &bytes);
+ if (r < 0) {
+ log_error("Failed to parse bytes specification %s", assignment);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append(m, "v", "t", (uint64_t) bytes);
+
+ } else if (STR_IN_SET(field, "CPUShares", "BlockIOWeight")) {
+ uint64_t u;
+
+ r = safe_atou64(eq, &u);
+ if (r < 0) {
+ log_error("Failed to parse %s value %s.", field, eq);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append(m, "v", "t", u);
+
+ } else if (STR_IN_SET(field, "User", "Group", "DevicePolicy", "KillMode"))
+ r = sd_bus_message_append(m, "v", "s", eq);
+
+ else if (streq(field, "DeviceAllow")) {
+
+ if (isempty(eq))
+ r = sd_bus_message_append(m, "v", "a(ss)", 0);
+ else {
+ const char *path, *rwm, *e;
+
+ e = strchr(eq, ' ');
+ if (e) {
+ path = strndupa(eq, e - eq);
+ rwm = e+1;
+ } else {
+ path = eq;
+ rwm = "";
+ }
+
+ if (!path_startswith(path, "/dev")) {
+ log_error("%s is not a device file in /dev.", path);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append(m, "v", "a(ss)", 1, path, rwm);
+ }
+
+ } else if (STR_IN_SET(field, "BlockIOReadBandwidth", "BlockIOWriteBandwidth")) {
+
+ if (isempty(eq))
+ r = sd_bus_message_append(m, "v", "a(st)", 0);
+ else {
+ const char *path, *bandwidth, *e;
+ off_t bytes;
+
+ e = strchr(eq, ' ');
+ if (e) {
+ path = strndupa(eq, e - eq);
+ bandwidth = e+1;
+ } else {
+ log_error("Failed to parse %s value %s.", field, eq);
+ return -EINVAL;
+ }
+
+ if (!path_startswith(path, "/dev")) {
+ log_error("%s is not a device file in /dev.", path);
+ return -EINVAL;
+ }
+
+ r = parse_size(bandwidth, 1000, &bytes);
+ if (r < 0) {
+ log_error("Failed to parse byte value %s.", bandwidth);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append(m, "v", "a(st)", 1, path, (uint64_t) bytes);
+ }
+
+ } else if (streq(field, "BlockIODeviceWeight")) {
+
+ if (isempty(eq))
+ r = sd_bus_message_append(m, "v", "a(st)", 0);
+ else {
+ const char *path, *weight, *e;
+ uint64_t u;
+
+ e = strchr(eq, ' ');
+ if (e) {
+ path = strndupa(eq, e - eq);
+ weight = e+1;
+ } else {
+ log_error("Failed to parse %s value %s.", field, eq);
+ return -EINVAL;
+ }
+
+ if (!path_startswith(path, "/dev")) {
+ log_error("%s is not a device file in /dev.", path);
+ return -EINVAL;
+ }
+
+ r = safe_atou64(weight, &u);
+ if (r < 0) {
+ log_error("Failed to parse %s value %s.", field, weight);
+ return -EINVAL;
+ }
+ r = sd_bus_message_append(m, "v", "a(st)", path, u);
+ }
+
+ } else if (rlimit_from_string(field) >= 0) {
+ uint64_t rl;
+
+ if (streq(eq, "infinity"))
+ rl = (uint64_t) -1;
+ else {
+ r = safe_atou64(eq, &rl);
+ if (r < 0) {
+ log_error("Invalid resource limit: %s", eq);
+ return -EINVAL;
+ }
+ }
+
+ r = sd_bus_message_append(m, "v", "t", rl);
+
+ } else if (streq(field, "Nice")) {
+ int32_t i;
+
+ r = safe_atoi32(eq, &i);
+ if (r < 0) {
+ log_error("Failed to parse %s value %s.", field, eq);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append(m, "v", "i", i);
+
+ } else if (streq(field, "Environment")) {
+
+ r = sd_bus_message_append(m, "v", "as", 1, eq);
+
+ } else if (streq(field, "KillSignal")) {
+ int sig;
+
+ sig = signal_from_string_try_harder(eq);
+ if (sig < 0) {
+ log_error("Failed to parse %s value %s.", field, eq);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append(m, "v", "i", sig);
+
+ } else if (streq(field, "AccuracySec")) {
+ usec_t u;
+
+ r = parse_sec(eq, &u);
+ if (r < 0) {
+ log_error("Failed to parse %s value %s", field, eq);
+ return -EINVAL;
+ }
+
+ r = sd_bus_message_append(m, "v", "t", u);
+
+ } else {
+ log_error("Unknown assignment %s.", assignment);
+ return -EINVAL;
+ }
+
+ if (r < 0)
+ return bus_log_create_error(r);
+
+ return 0;
+}
+
+typedef struct BusWaitForJobs {
+ sd_bus *bus;
+ Set *jobs;
+
+ char *name;
+ char *result;
+
+ sd_bus_slot *slot_job_removed;
+ sd_bus_slot *slot_disconnected;
+} BusWaitForJobs;
+
+static int match_disconnected(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+ assert(m);
+
+ log_error("Warning! D-Bus connection terminated.");
+ sd_bus_close(sd_bus_message_get_bus(m));
+
+ return 0;
+}
+
+static int match_job_removed(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+ const char *path, *unit, *result;
+ BusWaitForJobs *d = userdata;
+ uint32_t id;
+ char *found;
+ int r;
+
+ assert(m);
+ assert(d);
+
+ r = sd_bus_message_read(m, "uoss", &id, &path, &unit, &result);
+ if (r < 0) {
+ bus_log_parse_error(r);
+ return 0;
+ }
+
+ found = set_remove(d->jobs, (char*) path);
+ if (!found)
+ return 0;
+
+ free(found);
+
+ if (!isempty(result))
+ d->result = strdup(result);
+
+ if (!isempty(unit))
+ d->name = strdup(unit);
+
+ return 0;
+}
+
+void bus_wait_for_jobs_free(BusWaitForJobs *d) {
+ if (!d)
+ return;
+
+ set_free_free(d->jobs);
+
+ sd_bus_slot_unref(d->slot_disconnected);
+ sd_bus_slot_unref(d->slot_job_removed);
+
+ sd_bus_unref(d->bus);
+
+ free(d->name);
+ free(d->result);
+
+ free(d);
+}
+
+int bus_wait_for_jobs_new(sd_bus *bus, BusWaitForJobs **ret) {
+ _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *d = NULL;
+ int r;
+
+ assert(bus);
+ assert(ret);
+
+ d = new0(BusWaitForJobs, 1);
+ if (!d)
+ return -ENOMEM;
+
+ d->bus = sd_bus_ref(bus);
+
+ /* When we are a bus client we match by sender. Direct
+ * connections OTOH have no initialized sender field, and
+ * hence we ignore the sender then */
+ r = sd_bus_add_match(
+ bus,
+ &d->slot_job_removed,
+ bus->bus_client ?
+ "type='signal',"
+ "sender='org.freedesktop.systemd1',"
+ "interface='org.freedesktop.systemd1.Manager',"
+ "member='JobRemoved',"
+ "path='/org/freedesktop/systemd1'" :
+ "type='signal',"
+ "interface='org.freedesktop.systemd1.Manager',"
+ "member='JobRemoved',"
+ "path='/org/freedesktop/systemd1'",
+ match_job_removed, d);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_add_match(
+ bus,
+ &d->slot_disconnected,
+ "type='signal',"
+ "sender='org.freedesktop.DBus.Local',"
+ "interface='org.freedesktop.DBus.Local',"
+ "member='Disconnected'",
+ match_disconnected, d);
+ if (r < 0)
+ return r;
+
+ *ret = d;
+ d = NULL;
+
+ return 0;
+}
+
+static int bus_process_wait(sd_bus *bus) {
+ int r;
+
+ for (;;) {
+ r = sd_bus_process(bus, NULL);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ return 0;
+
+ r = sd_bus_wait(bus, (uint64_t) -1);
+ if (r < 0)
+ return r;
+ }
+}
+
+static int bus_job_get_service_result(BusWaitForJobs *d, char **result) {
+ _cleanup_free_ char *dbus_path = NULL;
+
+ assert(d);
+ assert(d->name);
+ assert(result);
+
+ dbus_path = unit_dbus_path_from_name(d->name);
+ if (!dbus_path)
+ return -ENOMEM;
+
+ return sd_bus_get_property_string(d->bus,
+ "org.freedesktop.systemd1",
+ dbus_path,
+ "org.freedesktop.systemd1.Service",
+ "Result",
+ NULL,
+ result);
+}
+
+static const struct {
+ const char *result, *explanation;
+} explanations [] = {
+ { "resources", "a configured resource limit was exceeded" },
+ { "timeout", "a timeout was exceeded" },
+ { "exit-code", "the control process exited with error code" },
+ { "signal", "a fatal signal was delivered to the control process" },
+ { "core-dump", "a fatal signal was delivered causing the control process to dump core" },
+ { "watchdog", "the service failed to send watchdog ping" },
+ { "start-limit", "start of the service was attempted too often" }
+};
+
+static void log_job_error_with_service_result(const char* service, const char *result) {
+ _cleanup_free_ char *service_shell_quoted = NULL;
+
+ assert(service);
+
+ service_shell_quoted = shell_maybe_quote(service);
+
+ if (!isempty(result)) {
+ unsigned i;
+
+ for (i = 0; i < ELEMENTSOF(explanations); ++i)
+ if (streq(result, explanations[i].result))
+ break;
+
+ if (i < ELEMENTSOF(explanations)) {
+ log_error("Job for %s failed because %s. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
+ service,
+ explanations[i].explanation,
+ strna(service_shell_quoted));
+
+ goto finish;
+ }
+ }
+
+ log_error("Job for %s failed. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
+ service,
+ strna(service_shell_quoted));
+
+finish:
+ /* For some results maybe additional explanation is required */
+ if (streq_ptr(result, "start-limit"))
+ log_info("To force a start use \"systemctl reset-failed %1$s\" followed by \"systemctl start %1$s\" again.",
+ strna(service_shell_quoted));
+}
+
+static int check_wait_response(BusWaitForJobs *d, bool quiet) {
+ int r = 0;
+
+ assert(d->result);
+
+ if (!quiet) {
+ if (streq(d->result, "canceled"))
+ log_error("Job for %s canceled.", strna(d->name));
+ else if (streq(d->result, "timeout"))
+ log_error("Job for %s timed out.", strna(d->name));
+ else if (streq(d->result, "dependency"))
+ log_error("A dependency job for %s failed. See 'journalctl -xe' for details.", strna(d->name));
+ else if (streq(d->result, "invalid"))
+ log_error("Job for %s invalid.", strna(d->name));
+ else if (streq(d->result, "assert"))
+ log_error("Assertion failed on job for %s.", strna(d->name));
+ else if (streq(d->result, "unsupported"))
+ log_error("Operation on or unit type of %s not supported on this system.", strna(d->name));
+ else if (!streq(d->result, "done") && !streq(d->result, "skipped")) {
+ if (d->name) {
+ int q;
+ _cleanup_free_ char *result = NULL;
+
+ q = bus_job_get_service_result(d, &result);
+ if (q < 0)
+ log_debug_errno(q, "Failed to get Result property of service %s: %m", d->name);
+
+ log_job_error_with_service_result(d->name, result);
+ } else
+ log_error("Job failed. See \"journalctl -xe\" for details.");
+ }
+ }
+
+ if (streq(d->result, "canceled"))
+ r = -ECANCELED;
+ else if (streq(d->result, "timeout"))
+ r = -ETIME;
+ else if (streq(d->result, "dependency"))
+ r = -EIO;
+ else if (streq(d->result, "invalid"))
+ r = -ENOEXEC;
+ else if (streq(d->result, "assert"))
+ r = -EPROTO;
+ else if (streq(d->result, "unsupported"))
+ r = -EOPNOTSUPP;
+ else if (!streq(d->result, "done") && !streq(d->result, "skipped"))
+ r = -EIO;
+
+ return r;
+}
+
+int bus_wait_for_jobs(BusWaitForJobs *d, bool quiet) {
+ int r = 0;
+
+ assert(d);
+
+ while (!set_isempty(d->jobs)) {
+ int q;
+
+ q = bus_process_wait(d->bus);
+ if (q < 0)
+ return log_error_errno(q, "Failed to wait for response: %m");
+
+ if (d->result) {
+ q = check_wait_response(d, quiet);
+ /* Return the first error as it is most likely to be
+ * meaningful. */
+ if (q < 0 && r == 0)
+ r = q;
+
+ log_debug_errno(q, "Got result %s/%m for job %s", strna(d->result), strna(d->name));
+ }
+
+ free(d->name);
+ d->name = NULL;
+
+ free(d->result);
+ d->result = NULL;
+ }
+
+ return r;
+}
+
+int bus_wait_for_jobs_add(BusWaitForJobs *d, const char *path) {
+ int r;
+
+ assert(d);
+
+ r = set_ensure_allocated(&d->jobs, &string_hash_ops);
+ if (r < 0)
+ return r;
+
+ return set_put_strdup(d->jobs, path);
+}
+
+int bus_wait_for_jobs_one(BusWaitForJobs *d, const char *path, bool quiet) {
+ int r;
+
+ r = bus_wait_for_jobs_add(d, path);
+ if (r < 0)
+ return log_oom();
+
+ return bus_wait_for_jobs(d, quiet);
+}
+
+int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, UnitFileChange **changes, unsigned *n_changes) {
+ const char *type, *path, *source;
+ int r;
+
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "(sss)");
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ while ((r = sd_bus_message_read(m, "(sss)", &type, &path, &source)) > 0) {
+ if (!quiet) {
+ if (streq(type, "symlink"))
+ log_info("Created symlink from %s to %s.", path, source);
+ else
+ log_info("Removed symlink %s.", path);
+ }
+
+ r = unit_file_changes_add(changes, n_changes, streq(type, "symlink") ? UNIT_FILE_SYMLINK : UNIT_FILE_UNLINK, path, source);
+ if (r < 0)
+ return r;
+ }
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ return 0;
+}
+
+/**
+ * bus_path_encode_unique() - encode unique object path
+ * @b: bus connection or NULL
+ * @prefix: object path prefix
+ * @sender_id: unique-name of client, or NULL
+ * @external_id: external ID to be chosen by client, or NULL
+ * @ret_path: storage for encoded object path pointer
+ *
+ * Whenever we provide a bus API that allows clients to create and manage
+ * server-side objects, we need to provide a unique name for these objects. If
+ * we let the server choose the name, we suffer from a race condition: If a
+ * client creates an object asynchronously, it cannot destroy that object until
+ * it received the method reply. It cannot know the name of the new object,
+ * thus, it cannot destroy it. Furthermore, it enforces a round-trip.
+ *
+ * Therefore, many APIs allow the client to choose the unique name for newly
+ * created objects. There're two problems to solve, though:
+ * 1) Object names are usually defined via dbus object paths, which are
+ * usually globally namespaced. Therefore, multiple clients must be able
+ * to choose unique object names without interference.
+ * 2) If multiple libraries share the same bus connection, they must be
+ * able to choose unique object names without interference.
+ * The first problem is solved easily by prefixing a name with the
+ * unique-bus-name of a connection. The server side must enforce this and
+ * reject any other name. The second problem is solved by providing unique
+ * suffixes from within sd-bus.
+ *
+ * This helper allows clients to create unique object-paths. It uses the
+ * template '/prefix/sender_id/external_id' and returns the new path in
+ * @ret_path (must be freed by the caller).
+ * If @sender_id is NULL, the unique-name of @b is used. If @external_id is
+ * NULL, this function allocates a unique suffix via @b (by requesting a new
+ * cookie). If both @sender_id and @external_id are given, @b can be passed as
+ * NULL.
+ *
+ * Returns: 0 on success, negative error code on failure.
+ */
+int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) {
+ _cleanup_free_ char *sender_label = NULL, *external_label = NULL;
+ char external_buf[DECIMAL_STR_MAX(uint64_t)], *p;
+ int r;
+
+ assert_return(b || (sender_id && external_id), -EINVAL);
+ assert_return(object_path_is_valid(prefix), -EINVAL);
+ assert_return(ret_path, -EINVAL);
+
+ if (!sender_id) {
+ r = sd_bus_get_unique_name(b, &sender_id);
+ if (r < 0)
+ return r;
+ }
+
+ if (!external_id) {
+ xsprintf(external_buf, "%"PRIu64, ++b->cookie);
+ external_id = external_buf;
+ }
+
+ sender_label = bus_label_escape(sender_id);
+ if (!sender_label)
+ return -ENOMEM;
+
+ external_label = bus_label_escape(external_id);
+ if (!external_label)
+ return -ENOMEM;
+
+ p = strjoin(prefix, "/", sender_label, "/", external_label, NULL);
+ if (!p)
+ return -ENOMEM;
+
+ *ret_path = p;
+ return 0;
+}
+
+/**
+ * bus_path_decode_unique() - decode unique object path
+ * @path: object path to decode
+ * @prefix: object path prefix
+ * @ret_sender: output parameter for sender-id label
+ * @ret_external: output parameter for external-id label
+ *
+ * This does the reverse of bus_path_encode_unique() (see its description for
+ * details). Both trailing labels, sender-id and external-id, are unescaped and
+ * returned in the given output parameters (the caller must free them).
+ *
+ * Note that this function returns 0 if the path does not match the template
+ * (see bus_path_encode_unique()), 1 if it matched.
+ *
+ * Returns: Negative error code on failure, 0 if the given object path does not
+ * match the template (return parameters are set to NULL), 1 if it was
+ * parsed successfully (return parameters contain allocated labels).
+ */
+int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) {
+ const char *p, *q;
+ char *sender, *external;
+
+ assert(object_path_is_valid(path));
+ assert(object_path_is_valid(prefix));
+ assert(ret_sender);
+ assert(ret_external);
+
+ p = object_path_startswith(path, prefix);
+ if (!p) {
+ *ret_sender = NULL;
+ *ret_external = NULL;
+ return 0;
+ }
+
+ q = strchr(p, '/');
+ if (!q) {
+ *ret_sender = NULL;
+ *ret_external = NULL;
+ return 0;
+ }
+
+ sender = bus_label_unescape_n(p, q - p);
+ external = bus_label_unescape(q + 1);
+ if (!sender || !external) {
+ free(sender);
+ free(external);
+ return -ENOMEM;
+ }
+
+ *ret_sender = sender;
+ *ret_external = external;
+ return 1;
+}
+
+bool is_kdbus_wanted(void) {
+ _cleanup_free_ char *value = NULL;
+ int r;
+
+ if (get_proc_cmdline_key("kdbus", NULL) <= 0) {
+ r = get_proc_cmdline_key("kdbus=", &value);
+ if (r <= 0 || parse_boolean(value) != 1)
+ return false;
+ }
+
+ return true;
+}
+
+bool is_kdbus_available(void) {
+ _cleanup_close_ int fd = -1;
+ struct kdbus_cmd cmd = { .size = sizeof(cmd), .flags = KDBUS_FLAG_NEGOTIATE };
+
+ if (!is_kdbus_wanted())
+ return false;
+
+ fd = open("/sys/fs/kdbus/control", O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY);
+ if (fd < 0)
+ return false;
+
+ return ioctl(fd, KDBUS_CMD_BUS_MAKE, &cmd) >= 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-13 01:11:28 +0000