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authorLennart Poettering <lennart@poettering.net>2013-12-02 23:30:19 +0100
committerLennart Poettering <lennart@poettering.net>2013-12-02 23:32:34 +0100
commite821075a23fdfa3ca7738fc30bb2d4c430fe10c0 (patch)
tree37f970d8139c7796dda5ef0a295ee121ceabf349 /src/libsystemd-bus/bus-kernel.c
parentf9638db8de2f915a5c5f6e4b7292494168eb4141 (diff)
bus: add .busname unit type to implement kdbus-style bus activation
Diffstat (limited to 'src/libsystemd-bus/bus-kernel.c')
-rw-r--r--src/libsystemd-bus/bus-kernel.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/src/libsystemd-bus/bus-kernel.c b/src/libsystemd-bus/bus-kernel.c
index fb852bd730..76a55c7822 100644
--- a/src/libsystemd-bus/bus-kernel.c
+++ b/src/libsystemd-bus/bus-kernel.c
@@ -1096,6 +1096,56 @@ int bus_kernel_create_bus(const char *name, char **s) {
return fd;
}
+int bus_kernel_create_starter(const char *bus, const char *name) {
+ struct kdbus_cmd_hello *hello;
+ struct kdbus_item *n;
+ char *p;
+ int fd;
+
+ assert(bus);
+ assert(name);
+
+ p = alloca(sizeof("/dev/kdbus/") - 1 + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + sizeof("/bus"));
+ sprintf(p, "/dev/kdbus/%lu-%s/bus", (unsigned long) getuid(), bus);
+
+ fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return -errno;
+
+ hello = alloca0(ALIGN8(offsetof(struct kdbus_cmd_hello, items) +
+ offsetof(struct kdbus_item, str) +
+ strlen(name) + 1));
+
+ n = hello->items;
+ strcpy(n->str, name);
+ n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
+ n->type = KDBUS_ITEM_STARTER_NAME;
+
+ hello->size = ALIGN8(offsetof(struct kdbus_cmd_hello, items) + n->size);
+ hello->conn_flags = KDBUS_HELLO_STARTER;
+ hello->pool_size = KDBUS_POOL_SIZE;
+
+ if (ioctl(fd, KDBUS_CMD_HELLO, hello) < 0) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ /* The higher 32bit of both flags fields are considered
+ * 'incompatible flags'. Refuse them all for now. */
+ if (hello->bus_flags > 0xFFFFFFFFULL ||
+ hello->conn_flags > 0xFFFFFFFFULL) {
+ close_nointr_nofail(fd);
+ return -ENOTSUP;
+ }
+
+ if (hello->bloom_size != BLOOM_SIZE) {
+ close_nointr_nofail(fd);
+ return -ENOTSUP;
+ }
+
+ return fd;
+}
+
int bus_kernel_create_namespace(const char *name, char **s) {
struct kdbus_cmd_ns_make *make;
struct kdbus_item *n;