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Diffstat (limited to 'src/libsystemd/sd-bus/bus-util.c')
-rw-r--r--src/libsystemd/sd-bus/bus-util.c1232
1 files changed, 1232 insertions, 0 deletions
diff --git a/src/libsystemd/sd-bus/bus-util.c b/src/libsystemd/sd-bus/bus-util.c
new file mode 100644
index 0000000000..a468bcad6b
--- /dev/null
+++ b/src/libsystemd/sd-bus/bus-util.c
@@ -0,0 +1,1232 @@
+/*-*- 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 <sys/capability.h>
+
+#include "util.h"
+#include "strv.h"
+#include "macro.h"
+#include "def.h"
+#include "missing.h"
+
+#include "sd-event.h"
+#include "sd-bus.h"
+#include "bus-error.h"
+#include "bus-message.h"
+#include "bus-util.h"
+#include "bus-internal.h"
+
+static int name_owner_change_callback(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+ sd_event *e = userdata;
+
+ assert(bus);
+ assert(m);
+ assert(e);
+
+ 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, 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) {
+ r = bus_async_unregister_and_exit(e, bus, name);
+ if (r < 0)
+ return r;
+
+ exiting = true;
+ }
+ }
+
+ 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;
+}
+
+int bus_verify_polkit(
+ sd_bus *bus,
+ sd_bus_message *m,
+ const char *action,
+ bool interactive,
+ bool *_challenge,
+ sd_bus_error *e) {
+
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ uid_t uid;
+ int r;
+
+ assert(bus);
+ assert(m);
+ assert(action);
+
+ r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_UID, &creds);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_uid(creds, &uid);
+ if (r < 0)
+ return r;
+
+ if (uid == 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(m);
+ if (!sender)
+ return -EBADMSG;
+
+ r = sd_bus_call_method(
+ 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,
+ interactive ? 1 : 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;
+ uint64_t serial;
+ Hashmap *registry;
+} AsyncPolkitQuery;
+
+static void async_polkit_query_free(sd_bus *b, AsyncPolkitQuery *q) {
+
+ if (!q)
+ return;
+
+ if (q->serial > 0 && b)
+ sd_bus_call_async_cancel(b, q->serial);
+
+ 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 *bus, 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(bus);
+ assert(reply);
+ assert(q);
+
+ q->reply = sd_bus_message_ref(reply);
+ q->serial = 0;
+
+ 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(bus, q->request, q->userdata, &error_buffer);
+ r = bus_maybe_reply_error(q->request, r, &error_buffer);
+
+finish:
+ async_polkit_query_free(bus, q);
+ return r;
+}
+
+#endif
+
+int bus_verify_polkit_async(
+ sd_bus *bus,
+ Hashmap **registry,
+ sd_bus_message *m,
+ const char *action,
+ bool interactive,
+ sd_bus_error *error,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
+#ifdef ENABLE_POLKIT
+ _cleanup_bus_message_unref_ sd_bus_message *pk = NULL;
+ AsyncPolkitQuery *q;
+ const char *sender;
+#endif
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ uid_t uid;
+ int r;
+
+ assert(bus);
+ assert(registry);
+ assert(m);
+ assert(action);
+
+#ifdef ENABLE_POLKIT
+ q = hashmap_get(*registry, m);
+ 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;
+
+ return -EACCES;
+ }
+#endif
+
+ r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_UID, &creds);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_uid(creds, &uid);
+ if (r < 0)
+ return r;
+
+ if (uid == 0)
+ return 1;
+
+#ifdef ENABLE_POLKIT
+ sender = sd_bus_message_get_sender(m);
+ if (!sender)
+ return -EBADMSG;
+
+ r = hashmap_ensure_allocated(registry, trivial_hash_func, trivial_compare_func);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_new_method_call(
+ bus,
+ "org.freedesktop.PolicyKit1",
+ "/org/freedesktop/PolicyKit1/Authority",
+ "org.freedesktop.PolicyKit1.Authority",
+ "CheckAuthorization",
+ &pk);
+ 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 ? 1 : 0,
+ NULL);
+ if (r < 0)
+ return r;
+
+ q = new0(AsyncPolkitQuery, 1);
+ if (!q)
+ return -ENOMEM;
+
+ q->request = sd_bus_message_ref(m);
+ q->callback = callback;
+ q->userdata = userdata;
+
+ r = hashmap_put(*registry, m, q);
+ if (r < 0) {
+ async_polkit_query_free(bus, q);
+ return r;
+ }
+
+ q->registry = *registry;
+
+ r = sd_bus_call_async(bus, pk, async_polkit_callback, q, 0, &q->serial);
+ if (r < 0) {
+ async_polkit_query_free(bus, q);
+ return r;
+ }
+
+ return 0;
+#endif
+
+ return -EACCES;
+}
+
+void bus_verify_polkit_async_registry_free(sd_bus *bus, Hashmap *registry) {
+#ifdef ENABLE_POLKIT
+ AsyncPolkitQuery *q;
+
+ while ((q = hashmap_steal_first(registry)))
+ async_polkit_query_free(bus, 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_PATH);
+ 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_FMT, (unsigned long) 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))
+ printf("%s=%s\n", name, s);
+
+ return 1;
+ }
+
+ case SD_BUS_TYPE_BOOLEAN: {
+ bool 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_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) {
+ if (first)
+ printf("%s=", name);
+
+ printf("%s%s", first ? "" : " ", str);
+
+ 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 *str;
+ char **p = userdata;
+
+ r = sd_bus_message_read_basic(m, type, &s);
+ if (r < 0)
+ break;
+
+ if (isempty(s))
+ break;
+
+ str = strdup(s);
+ if (!str) {
+ r = -ENOMEM;
+ break;
+ }
+ free(*p);
+ *p = str;
+
+ 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_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;
+
+ 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(bus, member, m, &error, v);
+ else
+ r = map_basic(bus, 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;
+ }
+
+ return r;
+}
+
+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, -ENOTSUP);
+
+ 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(host, bus);
+ break;
+
+ case BUS_TRANSPORT_CONTAINER:
+ r = sd_bus_open_system_container(host, bus);
+ 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, -ENOTSUP);
+
+ 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(host, bus);
+ break;
+
+ case BUS_TRANSPORT_CONTAINER:
+ r = sd_bus_open_system_container(host, bus);
+ break;
+
+ default:
+ assert_not_reached("Hmm, unknown transport type.");
+ }
+
+ return r;
+}
+
+int bus_property_get_tristate(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ int *tristate = userdata;
+
+ return sd_bus_message_append(reply, "b", *tristate > 0);
+}
+
+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) {
+ log_error("Failed to parse message: %s", strerror(-r));
+ return r;
+}
+
+int bus_log_create_error(int r) {
+ log_error("Failed to create message: %s", strerror(-r));
+ return r;
+}
+
+int bus_parse_unit_info(sd_bus_message *message, UnitInfo *u) {
+ assert(message);
+ assert(u);
+
+ 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_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error) {
+ assert(m);
+
+ if (r < 0) {
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
+ sd_bus_reply_method_errno(m, r, error);
+
+ } else if (sd_bus_error_is_set(error)) {
+ if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
+ sd_bus_reply_method_error(m, error);
+ } else
+ return r;
+
+ log_debug("Failed to process message [type=%s sender=%s path=%s interface=%s member=%s signature=%s]: %s",
+ bus_message_type_to_string(m->header->type),
+ strna(m->sender),
+ strna(m->path),
+ strna(m->interface),
+ strna(m->member),
+ strna(m->root_container.signature),
+ bus_error_message(error, r));
+
+ return 1;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-04 20:04:55 +0000