core: set $JOURNAL_STREAM to the dev_t/ino_t of the journal stream of executed services

This permits services to detect whether their stdout/stderr is connected to the
journal, and if so talk to the journal directly, thus permitting carrying of
metadata.

As requested by the gtk folks: #2473

diff --git a/src/basic/formats-util.h b/src/basic/formats-util.h
index 9b4e8e98faacf301a125a092a2070861c75e0391..39a185f59b4affffedc8044b556a4ab019edcd95 100644 (file)
--- a/src/basic/formats-util.h
+++ b/src/basic/formats-util.h
@@ -61,3 +61,19 @@
 #else
 #  error Unknown rlim_t size
 #endif
+
+#if SIZEOF_DEV_T == 8
+#  define DEV_FMT "%" PRIu64
+#elif SIZEOF_DEV_T == 4
+#  define DEV_FMT "%" PRIu32
+#else
+#  error Unknown dev_t size
+#endif
+
+#if SIZEOF_INO_T == 8
+#  define INO_FMT "%" PRIu64
+#elif SIZEOF_INO_T == 4
+#  define INO_FMT "%" PRIu32
+#else
+#  error Unknown ino_t size
+#endif