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authorDaniel Mack <zonque@gmail.com>2013-11-29 20:44:10 +0100
committerDaniel Mack <zonque@gmail.com>2013-11-29 22:01:34 +0100
commit6018903565b130a908481bb405026b7135ecb93b (patch)
tree83d46e4778918db022aa3501b281cb465f4fb701 /src
parent87b522ae1936c4da9446ee2e05f7b4560ad549cd (diff)
libsystemd-bus: add kdbus support for sd_bus_get_owner()
Diffstat (limited to 'src')
-rw-r--r--src/libsystemd-bus/bus-control.c185
1 files changed, 185 insertions, 0 deletions
diff --git a/src/libsystemd-bus/bus-control.c b/src/libsystemd-bus/bus-control.c
index 848a485c3f..daa10eb760 100644
--- a/src/libsystemd-bus/bus-control.c
+++ b/src/libsystemd-bus/bus-control.c
@@ -587,6 +587,188 @@ static int add_name_change_match(sd_bus *bus,
return 0;
}
+static int kdbus_name_query(
+ sd_bus *bus,
+ const char *name,
+ uint64_t mask,
+ char **owner,
+ sd_bus_creds **creds) {
+
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
+ _cleanup_free_ char *unique = NULL;
+ struct kdbus_cmd_name_info *name_info = NULL;
+ struct kdbus_item *item;
+ uint64_t attach_flags, m;
+ size_t slen, size;
+ int r;
+
+ r = kdbus_translate_attach_flags(mask, &attach_flags);
+ if (r < 0)
+ return r;
+
+ slen = strlen(name) + 1;
+
+ /*
+ * The structure is used for both directions. Start with 8k buffer size and
+ * expand to the size kdbus reports in case we fail.
+ */
+ size = slen + 8192;
+
+ for(;;) {
+ name_info = realloc(name_info, size);
+ if (!name_info)
+ return -ENOMEM;
+
+ memset(name_info, 0, size);
+
+ name_info->size = size;
+ name_info->attach_flags = attach_flags;
+
+ item = name_info->items;
+ item->type = KDBUS_NAME_INFO_ITEM_NAME;
+ item->size = KDBUS_ITEM_SIZE(slen);
+ strcpy(item->str, name);
+
+ r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_NAME_QUERY, name_info);
+ if (r < 0) {
+ if (errno == ENOBUFS && size != name_info->size) {
+ size = name_info->size;
+ continue;
+ }
+
+ return -errno;
+ }
+
+ break;
+ }
+
+ asprintf(&unique, ":1.%llu", (unsigned long long) name_info->id);
+
+ c = bus_creds_new();
+ if (!c)
+ return -ENOMEM;
+
+ KDBUS_PART_FOREACH(item, name_info, items) {
+ switch (item->type) {
+ case KDBUS_ITEM_CREDS:
+ m = (SD_BUS_CREDS_UID | SD_BUS_CREDS_GID | SD_BUS_CREDS_PID |
+ SD_BUS_CREDS_TID | SD_BUS_CREDS_PID_STARTTIME) & mask;
+
+ if (m) {
+ c->uid = item->creds.uid;
+ c->pid = item->creds.pid;
+ c->gid = item->creds.gid;
+ c->tid = item->creds.tid;
+ c->pid_starttime = item->creds.starttime;
+ c->mask |= m;
+ }
+ break;
+
+ case KDBUS_ITEM_PID_COMM:
+ if (mask & SD_BUS_CREDS_COMM) {
+ c->comm = strdup(item->str);
+ if (!c->comm)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_COMM;
+ }
+ break;
+
+ case KDBUS_ITEM_TID_COMM:
+ if (mask & SD_BUS_CREDS_TID_COMM) {
+ c->tid_comm = strdup(item->str);
+ if (!c->tid_comm)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_TID_COMM;
+ }
+ break;
+
+ case KDBUS_ITEM_EXE:
+ if (mask & SD_BUS_CREDS_EXE) {
+ c->exe = strdup(item->str);
+ if (!c->exe)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_EXE;
+ }
+ break;
+
+ case KDBUS_ITEM_CMDLINE:
+ if (mask & SD_BUS_CREDS_CMDLINE) {
+ c->cmdline_length = item->size - KDBUS_PART_HEADER_SIZE;
+ c->cmdline = memdup(item->data, c->cmdline_length);
+ if (!c->cmdline)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_CMDLINE;
+ }
+ break;
+
+ case KDBUS_ITEM_CGROUP:
+ m = (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) & mask;
+
+ if (m) {
+ c->cgroup = strdup(item->str);
+ if (!c->cgroup)
+ return -ENOMEM;
+
+ c->mask |= m;
+ }
+ break;
+
+ case KDBUS_ITEM_CAPS:
+ m = (SD_BUS_CREDS_EFFECTIVE_CAPS | SD_BUS_CREDS_PERMITTED_CAPS |
+ SD_BUS_CREDS_INHERITABLE_CAPS | SD_BUS_CREDS_BOUNDING_CAPS) & mask;
+
+ if (m) {
+ c->capability_size = item->size - KDBUS_PART_HEADER_SIZE;
+ c->capability = memdup(item->data, c->capability_size);
+ if (!c->capability)
+ return -ENOMEM;
+
+ c->mask |= m;
+ }
+ break;
+
+ case KDBUS_ITEM_SECLABEL:
+ if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
+ c->label = strdup(item->str);
+ if (!c->label)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
+ }
+ break;
+
+ case KDBUS_ITEM_AUDIT:
+ m = (SD_BUS_CREDS_AUDIT_SESSION_ID | SD_BUS_CREDS_AUDIT_LOGIN_UID) & mask;
+
+ if (m) {
+ c->audit_session_id = item->audit.sessionid;
+ c->audit_login_uid = item->audit.loginuid;
+ c->mask |= m;
+ }
+ break;
+ }
+ }
+
+ if (creds) {
+ *creds = c;
+ c = NULL;
+ }
+
+ if (owner) {
+ *owner = unique;
+ unique = NULL;
+ }
+
+ return 0;
+}
+
_public_ int sd_bus_get_owner(
sd_bus *bus,
const char *name,
@@ -601,6 +783,9 @@ _public_ int sd_bus_get_owner(
assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
assert_return(!bus_pid_changed(bus), -ECHILD);
+ if (bus->is_kernel)
+ return kdbus_name_query(bus, name, mask, owner, creds);
+
return sd_bus_get_owner_dbus(bus, name, mask, owner, creds);
}