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authorDenis Kenzior <denkenz@gmail.com>2014-08-18 13:21:55 -0500
committerLennart Poettering <lennart@poettering.net>2014-08-18 21:01:57 +0200
commitfe3f22d116f6f0cac3bdfa512ac54c0faf8bb7cd (patch)
tree9aaa2dc5b7a119be93e8e14b3d8a7a3404e3078c /src/libsystemd
parenta1d4404f9ab20159d88fbe9b4ed9a4f3f5b8345e (diff)
bus-control: Fix cgroup handling
On systems without properly setup systemd, cg_get_root_path returns -ENOENT. This means that busctl doesn't display much information. busctl monitor also fails whenever it intercepts messages. This fix fakes creates a fake "/" root cgroup which lets busctl work on such systems.
Diffstat (limited to 'src/libsystemd')
-rw-r--r--src/libsystemd/sd-bus/bus-control.c8
-rw-r--r--src/libsystemd/sd-bus/bus-internal.h2
-rw-r--r--src/libsystemd/sd-bus/bus-kernel.c8
-rw-r--r--src/libsystemd/sd-bus/sd-bus.c18
4 files changed, 26 insertions, 10 deletions
diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index 076bbce6b1..ad372f6772 100644
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -495,11 +495,9 @@ static int bus_get_owner_kdbus(
goto fail;
}
- if (!bus->cgroup_root) {
- r = cg_get_root_path(&bus->cgroup_root);
- if (r < 0)
- goto fail;
- }
+ r = bus_get_root_path(bus);
+ if (r < 0)
+ goto fail;
c->cgroup_root = strdup(bus->cgroup_root);
if (!c->cgroup_root) {
diff --git a/src/libsystemd/sd-bus/bus-internal.h b/src/libsystemd/sd-bus/bus-internal.h
index f2ccdfd177..601ea5afb1 100644
--- a/src/libsystemd/sd-bus/bus-internal.h
+++ b/src/libsystemd/sd-bus/bus-internal.h
@@ -383,3 +383,5 @@ int bus_set_address_system_remote(sd_bus *b, const char *host);
int bus_set_address_system_container(sd_bus *b, const char *machine);
int bus_remove_match_by_string(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata);
+
+int bus_get_root_path(sd_bus *bus);
diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index d384f846b9..3ca271c704 100644
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -542,11 +542,9 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k) {
m->creds.cgroup = d->str;
m->creds.mask |= (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) & bus->creds_mask;
- if (!bus->cgroup_root) {
- r = cg_get_root_path(&bus->cgroup_root);
- if (r < 0)
- goto fail;
- }
+ r = bus_get_root_path(bus);
+ if (r < 0)
+ goto fail;
m->creds.cgroup_root = bus->cgroup_root;
diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
index 83233fd7e6..a204d67590 100644
--- a/src/libsystemd/sd-bus/sd-bus.c
+++ b/src/libsystemd/sd-bus/sd-bus.c
@@ -3358,3 +3358,21 @@ _public_ int sd_bus_get_name(sd_bus *bus, const char **name) {
*name = bus->connection_name;
return 0;
}
+
+int bus_get_root_path(sd_bus *bus) {
+ int r;
+
+ if (bus->cgroup_root)
+ return 0;
+
+ r = cg_get_root_path(&bus->cgroup_root);
+ if (r == -ENOENT) {
+ bus->cgroup_root = strdup("/");
+ if (!bus->cgroup_root)
+ return -ENOMEM;
+
+ r = 0;
+ }
+
+ return r;
+}