Revert "sd-bus: do not connect to dbus-1 socket when kdbus is available"

This reverts commit d4d00020d6ad855d65d31020fefa5003e1bb477f. The idea of
the commit is broken and needs to be reworked. We really cannot reduce
the bus-addresses to a single address. We always will have systemd with
native clients and legacy clients at the same time, so we also need both
addresses at the same time.

diff --git a/src/basic/def.h b/src/basic/def.h
index e0d6822..5aaba1f 100644 (file)
--- a/src/basic/def.h
+++ b/src/basic/def.h
@@ -63,6 +63,7 @@
 
 #define UNIX_SYSTEM_BUS_ADDRESS "unix:path=/var/run/dbus/system_bus_socket"
 #define KERNEL_SYSTEM_BUS_ADDRESS "kernel:path=/sys/fs/kdbus/0-system/bus"
+#define DEFAULT_SYSTEM_BUS_ADDRESS KERNEL_SYSTEM_BUS_ADDRESS ";" UNIX_SYSTEM_BUS_ADDRESS
 #define UNIX_USER_BUS_ADDRESS_FMT "unix:path=%s/bus"
 #define KERNEL_USER_BUS_ADDRESS_FMT "kernel:path=/sys/fs/kdbus/"UID_FMT"-user/bus"
 

diff --git a/src/bus-proxyd/bus-proxyd.c b/src/bus-proxyd/bus-proxyd.c
index 6e07aea..3cc3b33 100644 (file)
--- a/src/bus-proxyd/bus-proxyd.c
+++ b/src/bus-proxyd/bus-proxyd.c
@@ -177,9 +177,8 @@ static int help(void) {
                "     --configuration=PATH Configuration file or directory\n"
                "     --machine=MACHINE    Connect to specified machine\n"
                "     --address=ADDRESS    Connect to the bus specified by ADDRESS\n"
-               "                          (default: %s)\n",
-               program_invocation_short_name,
-               is_kdbus_available() ? KERNEL_SYSTEM_BUS_ADDRESS : UNIX_SYSTEM_BUS_ADDRESS);
+               "                          (default: " DEFAULT_SYSTEM_BUS_ADDRESS ")\n",
+               program_invocation_short_name);
 
         return 0;
 }
@@ -263,7 +262,7 @@ static int parse_argv(int argc, char *argv[]) {
         }
 
         if (!arg_address) {
-                arg_address = strdup(is_kdbus_available() ? KERNEL_SYSTEM_BUS_ADDRESS : UNIX_SYSTEM_BUS_ADDRESS);
+                arg_address = strdup(DEFAULT_SYSTEM_BUS_ADDRESS);
                 if (!arg_address)
                         return log_oom();
         }

diff --git a/src/bus-proxyd/stdio-bridge.c b/src/bus-proxyd/stdio-bridge.c
index c5dac39..f275f67 100644 (file)
--- a/src/bus-proxyd/stdio-bridge.c
+++ b/src/bus-proxyd/stdio-bridge.c
@@ -50,9 +50,8 @@ static int help(void) {
                "     --version            Show package version\n"
                "     --machine=MACHINE    Connect to specified machine\n"
                "     --address=ADDRESS    Connect to the bus specified by ADDRESS\n"
-               "                          (default: %s)\n",
-               program_invocation_short_name,
-               is_kdbus_available() ? KERNEL_SYSTEM_BUS_ADDRESS : UNIX_SYSTEM_BUS_ADDRESS);
+               "                          (default: " DEFAULT_SYSTEM_BUS_ADDRESS ")\n",
+               program_invocation_short_name);
 
         return 0;
 }
@@ -138,7 +137,7 @@ static int parse_argv(int argc, char *argv[]) {
         }
 
         if (!arg_address) {
-                arg_address = strdup(is_kdbus_available() ? KERNEL_SYSTEM_BUS_ADDRESS : UNIX_SYSTEM_BUS_ADDRESS);
+                arg_address = strdup(DEFAULT_SYSTEM_BUS_ADDRESS);
                 if (!arg_address)
                         return log_oom();
         }

diff --git a/src/core/automount.c b/src/core/automount.c
index 2b84c44..4af381b 100644 (file)
--- a/src/core/automount.c
+++ b/src/core/automount.c
@@ -39,6 +39,7 @@
 #include "path-util.h"
 #include "dbus-automount.h"
 #include "bus-util.h"
+#include "bus-error.h"
 #include "formats-util.h"
 #include "process-util.h"
 #include "async.h"

diff --git a/src/core/service.c b/src/core/service.c
index 7bd8cb8..b790ec9 100644 (file)
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -42,6 +42,7 @@
 #include "utf8.h"
 #include "env-util.h"
 #include "fileio.h"
+#include "bus-error.h"
 #include "bus-util.h"
 #include "bus-kernel.h"
 #include "formats-util.h"

diff --git a/src/core/socket.c b/src/core/socket.c
index c78e8ad..a387057 100644 (file)
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -43,6 +43,7 @@
 #include "def.h"
 #include "smack-util.h"
 #include "bus-util.h"
+#include "bus-error.h"
 #include "selinux-util.h"
 #include "dbus-socket.h"
 #include "unit.h"

diff --git a/src/core/timer.c b/src/core/timer.c
index 7027f83..89758c6 100644 (file)
--- a/src/core/timer.c
+++ b/src/core/timer.c
@@ -27,6 +27,7 @@
 #include "dbus-timer.h"
 #include "special.h"
 #include "bus-util.h"
+#include "bus-error.h"
 
 static const UnitActiveState state_translation_table[_TIMER_STATE_MAX] = {
         [TIMER_DEAD] = UNIT_INACTIVE,

diff --git a/src/dbus1-generator/dbus1-generator.c b/src/dbus1-generator/dbus1-generator.c
index 25c8e20..4980fcc 100644 (file)
--- a/src/dbus1-generator/dbus1-generator.c
+++ b/src/dbus1-generator/dbus1-generator.c
@@ -84,8 +84,7 @@ static int create_dbus_files(
                         fprintf(f, "Environment=DBUS_STARTER_BUS_TYPE=%s\n", type);
 
                         if (streq(type, "system"))
-                                fprintf(f, "Environment=DBUS_STARTER_ADDRESS=%s\n",
-                                        is_kdbus_available() ? KERNEL_SYSTEM_BUS_ADDRESS : UNIX_SYSTEM_BUS_ADDRESS);
+                                fprintf(f, "Environment=DBUS_STARTER_ADDRESS=" DEFAULT_SYSTEM_BUS_ADDRESS "\n");
                         else if (streq(type, "session")) {
                                 char *run;
 
@@ -95,10 +94,8 @@ static int create_dbus_files(
                                         return -EINVAL;
                                 }
 
-                                if (is_kdbus_available())
-                                        fprintf(f, "Environment=DBUS_STARTER_ADDRESS="KERNEL_USER_BUS_ADDRESS_FMT "\n", getuid());
-                                else
-                                        fprintf(f, "Environment=DBUS_STARTER_ADDRESS="UNIX_USER_BUS_ADDRESS_FMT "\n", run);
+                                fprintf(f, "Environment=DBUS_STARTER_ADDRESS="KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT "\n",
+                                        getuid(), run);
                         }
                 }
 

diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index ef3e087..aeb48be 100644 (file)
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -32,6 +32,7 @@
 #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) {

diff --git a/src/libsystemd/sd-bus/bus-convenience.c b/src/libsystemd/sd-bus/bus-convenience.c
index 79747e0..af5f7da 100644 (file)
--- a/src/libsystemd/sd-bus/bus-convenience.c
+++ b/src/libsystemd/sd-bus/bus-convenience.c
@@ -22,6 +22,7 @@
 #include "bus-internal.h"
 #include "bus-message.h"
 #include "bus-signature.h"
+#include "bus-util.h"
 #include "bus-type.h"
 
 _public_ int sd_bus_emit_signal(

diff --git a/src/libsystemd/sd-bus/bus-creds.c b/src/libsystemd/sd-bus/bus-creds.c
index 130fbf7..1c365b7 100644 (file)
--- a/src/libsystemd/sd-bus/bus-creds.c
+++ b/src/libsystemd/sd-bus/bus-creds.c
@@ -31,10 +31,10 @@
 #include "fileio.h"
 #include "audit.h"
 #include "bus-message.h"
+#include "bus-util.h"
 #include "strv.h"
 #include "bus-creds.h"
 #include "bus-label.h"
-#include "bus-internal.h"
 
 enum {
         CAP_OFFSET_INHERITABLE = 0,

diff --git a/src/libsystemd/sd-bus/bus-internal.c b/src/libsystemd/sd-bus/bus-internal.c
index f4ab57f..fea796c 100644 (file)
--- a/src/libsystemd/sd-bus/bus-internal.c
+++ b/src/libsystemd/sd-bus/bus-internal.c
@@ -371,45 +371,3 @@ int bus_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error) {
 
         return 1;
 }
-
-bool is_kdbus_wanted(void) {
-        _cleanup_free_ char *value = NULL;
-#ifdef ENABLE_KDBUS
-        const bool configured = true;
-#else
-        const bool configured = false;
-#endif
-        int r;
-
-        if (get_proc_cmdline_key("kdbus", NULL) > 0)
-                return true;
-
-        r = get_proc_cmdline_key("kdbus=", &value);
-        if (r <= 0)
-                return configured;
-
-        return parse_boolean(value) == 1;
-}
-
-bool is_kdbus_available(void) {
-        static int cached = -1;
-        _cleanup_close_ int fd = -1;
-        struct kdbus_cmd cmd = { .size = sizeof(cmd), .flags = KDBUS_FLAG_NEGOTIATE };
-
-        if (cached >= 0)
-                return (bool) cached;
-
-        if (!is_kdbus_wanted()) {
-                cached = false;
-                return false;
-        }
-
-        fd = open("/sys/fs/kdbus/control", O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY);
-        if (fd < 0) {
-                cached = false;
-                return false;
-        }
-
-        cached = ioctl(fd, KDBUS_CMD_BUS_MAKE, &cmd) >= 0;
-        return cached;
-}

diff --git a/src/libsystemd/sd-bus/bus-internal.h b/src/libsystemd/sd-bus/bus-internal.h
index 9b68fdd..7af61a9 100644 (file)
--- a/src/libsystemd/sd-bus/bus-internal.h
+++ b/src/libsystemd/sd-bus/bus-internal.h
@@ -37,29 +37,6 @@
 #include "bus-kernel.h"
 #include "kdbus.h"
 
-typedef enum BusTransport {
-        BUS_TRANSPORT_LOCAL,
-        BUS_TRANSPORT_REMOTE,
-        BUS_TRANSPORT_MACHINE,
-        _BUS_TRANSPORT_MAX,
-        _BUS_TRANSPORT_INVALID = -1
-} BusTransport;
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus*, sd_bus_unref);
-DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus*, sd_bus_flush_close_unref);
-DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_slot*, sd_bus_slot_unref);
-DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_message*, sd_bus_message_unref);
-DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_creds*, sd_bus_creds_unref);
-DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_track*, sd_bus_track_unref);
-
-#define _cleanup_bus_unref_ _cleanup_(sd_bus_unrefp)
-#define _cleanup_bus_flush_close_unref_ _cleanup_(sd_bus_flush_close_unrefp)
-#define _cleanup_bus_slot_unref_ _cleanup_(sd_bus_slot_unrefp)
-#define _cleanup_bus_message_unref_ _cleanup_(sd_bus_message_unrefp)
-#define _cleanup_bus_creds_unref_ _cleanup_(sd_bus_creds_unrefp)
-#define _cleanup_bus_track_unref_ _cleanup_(sd_bus_slot_unrefp)
-#define _cleanup_bus_error_free_ _cleanup_(sd_bus_error_free)
-
 struct reply_callback {
         sd_bus_message_handler_t callback;
         usec_t timeout;
@@ -417,9 +394,6 @@ int bus_get_root_path(sd_bus *bus);
 
 int bus_maybe_reply_error(sd_bus_message *m, int r, sd_bus_error *error);
 
-bool is_kdbus_wanted(void);
-bool is_kdbus_available(void);
-
 #define bus_assert_return(expr, r, error)                               \
         do {                                                            \
                 if (!assert_log(expr))                                  \

diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index 6750cbd..577a8b4 100644 (file)
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -45,6 +45,7 @@
 #include "bus-message.h"
 #include "bus-kernel.h"
 #include "bus-bloom.h"
+#include "bus-util.h"
 #include "bus-label.h"
 
 #define UNIQUE_NAME_MAX (3+DECIMAL_STR_MAX(uint64_t))

diff --git a/src/libsystemd/sd-bus/bus-match.c b/src/libsystemd/sd-bus/bus-match.c
index 7175cbe..2b83f43 100644 (file)
--- a/src/libsystemd/sd-bus/bus-match.c
+++ b/src/libsystemd/sd-bus/bus-match.c
@@ -22,6 +22,7 @@
 #include "bus-internal.h"
 #include "bus-message.h"
 #include "bus-match.h"
+#include "bus-util.h"
 #include "strv.h"
 
 /* Example:

diff --git a/src/libsystemd/sd-bus/bus-message.c b/src/libsystemd/sd-bus/bus-message.c
index 970aaab..a21ed8c 100644 (file)
--- a/src/libsystemd/sd-bus/bus-message.c
+++ b/src/libsystemd/sd-bus/bus-message.c
@@ -35,6 +35,7 @@
 #include "bus-type.h"
 #include "bus-signature.h"
 #include "bus-gvariant.h"
+#include "bus-util.h"
 
 static int message_append_basic(sd_bus_message *m, char type, const void *p, const void **stored);
 

diff --git a/src/libsystemd/sd-bus/bus-objects.c b/src/libsystemd/sd-bus/bus-objects.c
index a8e9a12..0593aa6 100644 (file)
--- a/src/libsystemd/sd-bus/bus-objects.c
+++ b/src/libsystemd/sd-bus/bus-objects.c
@@ -26,6 +26,7 @@
 #include "bus-type.h"
 #include "bus-signature.h"
 #include "bus-introspect.h"
+#include "bus-util.h"
 #include "bus-slot.h"
 #include "bus-objects.h"
 

diff --git a/src/libsystemd/sd-bus/bus-track.c b/src/libsystemd/sd-bus/bus-track.c
index 7803e39..e43891b 100644 (file)
--- a/src/libsystemd/sd-bus/bus-track.c
+++ b/src/libsystemd/sd-bus/bus-track.c
@@ -20,6 +20,7 @@
 ***/
 
 #include "sd-bus.h"
+#include "bus-util.h"
 #include "bus-internal.h"
 #include "bus-track.h"
 

diff --git a/src/libsystemd/sd-bus/busctl.c b/src/libsystemd/sd-bus/busctl.c
index 181621f..a1f0f30 100644 (file)
--- a/src/libsystemd/sd-bus/busctl.c
+++ b/src/libsystemd/sd-bus/busctl.c
@@ -30,6 +30,7 @@
 #include "set.h"
 
 #include "sd-bus.h"
+#include "bus-internal.h"
 #include "bus-util.h"
 #include "bus-dump.h"
 #include "bus-signature.h"

diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
index 31cdcb4..5434d62 100644 (file)
--- a/src/libsystemd/sd-bus/sd-bus.c
+++ b/src/libsystemd/sd-bus/sd-bus.c
@@ -44,6 +44,7 @@
 #include "bus-kernel.h"
 #include "bus-control.h"
 #include "bus-objects.h"
+#include "bus-util.h"
 #include "bus-container.h"
 #include "bus-protocol.h"
 #include "bus-track.h"
@@ -1173,10 +1174,7 @@ int bus_set_address_system(sd_bus *b) {
         if (e)
                 return sd_bus_set_address(b, e);
 
-        if (is_kdbus_available())
-                return sd_bus_set_address(b, KERNEL_SYSTEM_BUS_ADDRESS);
-
-        return sd_bus_set_address(b, UNIX_SYSTEM_BUS_ADDRESS);
+        return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS);
 }
 
 _public_ int sd_bus_open_system(sd_bus **ret) {
@@ -1224,17 +1222,16 @@ int bus_set_address_user(sd_bus *b) {
                 return sd_bus_set_address(b, e);
 
         e = secure_getenv("XDG_RUNTIME_DIR");
-        if (is_kdbus_available())
-                (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid());
-        else if (e) {
+        if (e) {
                 _cleanup_free_ char *ee = NULL;
 
                 ee = bus_address_escape(e);
                 if (!ee)
                         return -ENOMEM;
 
-                (void) asprintf(&b->address, UNIX_USER_BUS_ADDRESS_FMT, ee);
-        }
+                (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, getuid(), ee);
+        } else
+                (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid());
 
         if (!b->address)
                 return -ENOMEM;

diff --git a/src/libsystemd/sd-bus/test-bus-benchmark.c b/src/libsystemd/sd-bus/test-bus-benchmark.c
index d3bf6da..d14110a 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-benchmark.c
+++ b/src/libsystemd/sd-bus/test-bus-benchmark.c
@@ -28,6 +28,7 @@
 #include "sd-bus.h"
 #include "bus-kernel.h"
 #include "bus-internal.h"
+#include "bus-util.h"
 
 #define MAX_SIZE (2*1024*1024)
 

diff --git a/src/libsystemd/sd-bus/test-bus-chat.c b/src/libsystemd/sd-bus/test-bus-chat.c
index a0aecc1..20f1b53 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-chat.c
+++ b/src/libsystemd/sd-bus/test-bus-chat.c
@@ -33,6 +33,7 @@
 #include "bus-error.h"
 #include "bus-match.h"
 #include "bus-internal.h"
+#include "bus-util.h"
 
 static int match_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
         log_info("Match triggered! interface=%s member=%s", strna(sd_bus_message_get_interface(m)), strna(sd_bus_message_get_member(m)));

diff --git a/src/libsystemd/sd-bus/test-bus-cleanup.c b/src/libsystemd/sd-bus/test-bus-cleanup.c
index b483d47..f586880 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-cleanup.c
+++ b/src/libsystemd/sd-bus/test-bus-cleanup.c
@@ -22,6 +22,7 @@
 #include <stdio.h>
 
 #include "sd-bus.h"
+#include "bus-util.h"
 #include "bus-internal.h"
 #include "bus-message.h"
 #include "refcnt.h"

diff --git a/src/libsystemd/sd-bus/test-bus-error.c b/src/libsystemd/sd-bus/test-bus-error.c
index f2cfbc7..5753c04 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-error.c
+++ b/src/libsystemd/sd-bus/test-bus-error.c
@@ -20,6 +20,7 @@
 ***/
 
 #include "sd-bus.h"
+#include "bus-error.h"
 #include "bus-util.h"
 #include "errno-list.h"
 #include "bus-common-errors.h"

diff --git a/src/libsystemd/sd-bus/test-bus-gvariant.c b/src/libsystemd/sd-bus/test-bus-gvariant.c
index 414d4e9..b078bdc 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-gvariant.c
+++ b/src/libsystemd/sd-bus/test-bus-gvariant.c
@@ -27,6 +27,7 @@
 #include "macro.h"
 #include "sd-bus.h"
 #include "bus-gvariant.h"
+#include "bus-util.h"
 #include "bus-internal.h"
 #include "bus-message.h"
 #include "bus-dump.h"

diff --git a/src/libsystemd/sd-bus/test-bus-kernel.c b/src/libsystemd/sd-bus/test-bus-kernel.c
index 6284153..6506eaa 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-kernel.c
+++ b/src/libsystemd/sd-bus/test-bus-kernel.c
@@ -25,8 +25,8 @@
 #include "log.h"
 
 #include "sd-bus.h"
-#include "bus-util.h"
 #include "bus-kernel.h"
+#include "bus-util.h"
 #include "bus-dump.h"
 
 int main(int argc, char *argv[]) {

diff --git a/src/libsystemd/sd-bus/test-bus-match.c b/src/libsystemd/sd-bus/test-bus-match.c
index e29975d..75ea283 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-match.c
+++ b/src/libsystemd/sd-bus/test-bus-match.c
@@ -24,6 +24,7 @@
 
 #include "bus-match.h"
 #include "bus-message.h"
+#include "bus-util.h"
 #include "bus-slot.h"
 
 static bool mask[32];

diff --git a/src/libsystemd/sd-bus/test-bus-objects.c b/src/libsystemd/sd-bus/test-bus-objects.c
index 195013f..0a35b75 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-objects.c
+++ b/src/libsystemd/sd-bus/test-bus-objects.c
@@ -30,6 +30,7 @@
 #include "sd-bus.h"
 #include "bus-internal.h"
 #include "bus-message.h"
+#include "bus-util.h"
 #include "bus-dump.h"
 
 struct context {

diff --git a/src/libsystemd/sd-bus/test-bus-server.c b/src/libsystemd/sd-bus/test-bus-server.c
index 604df09..080d8ed 100644 (file)
--- a/src/libsystemd/sd-bus/test-bus-server.c
+++ b/src/libsystemd/sd-bus/test-bus-server.c
@@ -28,6 +28,7 @@
 
 #include "sd-bus.h"
 #include "bus-internal.h"
+#include "bus-util.h"
 
 struct context {
         int fds[2];

diff --git a/src/shared/bus-util.c b/src/shared/bus-util.c
index 1bcb890..1369a61 100644 (file)
--- a/src/shared/bus-util.c
+++ b/src/shared/bus-util.c
@@ -2032,3 +2032,37 @@ int bus_path_decode_unique(const char *path, const char *prefix, char **ret_send
         *ret_external = external;
         return 1;
 }
+
+bool is_kdbus_wanted(void) {
+        _cleanup_free_ char *value = NULL;
+#ifdef ENABLE_KDBUS
+        const bool configured = true;
+#else
+        const bool configured = false;
+#endif
+
+        int r;
+
+        if (get_proc_cmdline_key("kdbus", NULL) > 0)
+                return true;
+
+        r = get_proc_cmdline_key("kdbus=", &value);
+        if (r <= 0)
+                return configured;
+
+        return parse_boolean(value) == 1;
+}
+
+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;
+}

diff --git a/src/shared/bus-util.h b/src/shared/bus-util.h
index 0c683c0..4ae216b 100644 (file)
--- a/src/shared/bus-util.h
+++ b/src/shared/bus-util.h
@@ -23,12 +23,18 @@
 
 #include "sd-event.h"
 #include "sd-bus.h"
-#include "bus-error.h"
-#include "bus-internal.h"
 #include "hashmap.h"
 #include "install.h"
 #include "time-util.h"
 
+typedef enum BusTransport {
+        BUS_TRANSPORT_LOCAL,
+        BUS_TRANSPORT_REMOTE,
+        BUS_TRANSPORT_MACHINE,
+        _BUS_TRANSPORT_MAX,
+        _BUS_TRANSPORT_INVALID = -1
+} BusTransport;
+
 typedef int (*bus_property_set_t) (sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata);
 
 struct bus_properties_map {
@@ -129,6 +135,21 @@ typedef struct UnitInfo {
 
 int bus_parse_unit_info(sd_bus_message *message, UnitInfo *u);
 
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus*, sd_bus_unref);
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus*, sd_bus_flush_close_unref);
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_slot*, sd_bus_slot_unref);
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_message*, sd_bus_message_unref);
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_creds*, sd_bus_creds_unref);
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus_track*, sd_bus_track_unref);
+
+#define _cleanup_bus_unref_ _cleanup_(sd_bus_unrefp)
+#define _cleanup_bus_flush_close_unref_ _cleanup_(sd_bus_flush_close_unrefp)
+#define _cleanup_bus_slot_unref_ _cleanup_(sd_bus_slot_unrefp)
+#define _cleanup_bus_message_unref_ _cleanup_(sd_bus_message_unrefp)
+#define _cleanup_bus_creds_unref_ _cleanup_(sd_bus_creds_unrefp)
+#define _cleanup_bus_track_unref_ _cleanup_(sd_bus_slot_unrefp)
+#define _cleanup_bus_error_free_ _cleanup_(sd_bus_error_free)
+
 #define BUS_DEFINE_PROPERTY_GET_ENUM(function, name, type)              \
         int function(sd_bus *bus,                                       \
                      const char *path,                                  \
@@ -176,3 +197,6 @@ int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, Un
 
 int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path);
 int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external);
+
+bool is_kdbus_wanted(void);
+bool is_kdbus_available(void);