From 3acc1dafd14420872f7f13319260eeb5d62c2533 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 28 Nov 2014 15:59:05 +0100
Subject: sd-bus: add new call sd_bus_get_scope() for querying whether one is
 connected to a system or a user bus

---
 src/libsystemd/sd-bus/sd-bus.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

(limited to 'src/libsystemd/sd-bus/sd-bus.c')

diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
index 8f97a582d7..9ce6bfab8f 100644
--- a/src/libsystemd/sd-bus/sd-bus.c
+++ b/src/libsystemd/sd-bus/sd-bus.c
@@ -1283,6 +1283,7 @@ _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) {
 
         bus->bus_client = true;
         bus->trusted = false;
+        bus->is_system = true;
 
         r = sd_bus_start(bus);
         if (r < 0)
@@ -1335,6 +1336,7 @@ _public_ int sd_bus_open_system_container(sd_bus **ret, const char *machine) {
 
         bus->bus_client = true;
         bus->trusted = false;
+        bus->is_system = true;
 
         r = sd_bus_start(bus);
         if (r < 0)
@@ -3376,3 +3378,43 @@ int bus_get_root_path(sd_bus *bus) {
 
         return r;
 }
+
+_public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) {
+        int r;
+
+        assert_return(bus, -EINVAL);
+        assert_return(scope, -EINVAL);
+        assert_return(!bus_pid_changed(bus), -ECHILD);
+
+        if (bus->is_kernel) {
+                _cleanup_free_ char *n = NULL;
+                const char *dash;
+
+                r = bus_kernel_get_bus_name(bus, &n);
+                if (r < 0)
+                        return r;
+
+                if (streq(n, "0-system")) {
+                        *scope = "system";
+                        return 1;
+                }
+
+                dash = strchr(n, '-');
+                if (streq(dash, "-user")) {
+                        *scope = "user";
+                        return 1;
+                }
+        }
+
+        if (bus->is_user) {
+                *scope = "user";
+                return 1;
+        }
+
+        if (bus->is_system) {
+                *scope = "system";
+                return 1;
+        }
+
+        return -ENODATA;
+}
-- 
cgit v1.2.3-54-g00ecf