X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flibelogind%2Fsd-id128%2Fsd-id128.c;fp=src%2Flibelogind%2Fsd-id128%2Fsd-id128.c;h=d4450c70a003c357b0dafce92a542e2f67f87459;hp=9f47d04e61b26f1fe61750ae2858e87d4bf93172;hb=3c4743e938878986b5fd89119d1d050658b8024e;hpb=e234cf302eeeb19e4689639a980895d7257fa77a

diff --git a/src/libelogind/sd-id128/sd-id128.c b/src/libelogind/sd-id128/sd-id128.c
index 9f47d04e6..d4450c70a 100644
--- a/src/libelogind/sd-id128/sd-id128.c
+++ b/src/libelogind/sd-id128/sd-id128.c
@@ -129,6 +129,28 @@ _public_ int sd_id128_get_boot(sd_id128_t *ret) {
         return 0;
 }
 
+_public_ int sd_id128_get_invocation(sd_id128_t *ret) {
+        static thread_local sd_id128_t saved_invocation_id = {};
+        int r;
+
+        assert_return(ret, -EINVAL);
+
+        if (sd_id128_is_null(saved_invocation_id)) {
+                const char *e;
+
+                e = secure_getenv("INVOCATION_ID");
+                if (!e)
+                        return -ENXIO;
+
+                r = sd_id128_from_string(e, &saved_invocation_id);
+                if (r < 0)
+                        return r;
+        }
+
+        *ret = saved_invocation_id;
+        return 0;
+}
+
 static sd_id128_t make_v4_uuid(sd_id128_t id) {
         /* Stolen from generate_random_uuid() of drivers/char/random.c
          * in the kernel sources */