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-rw-r--r--io/sys/stat.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/io/sys/stat.h b/io/sys/stat.h
index 1a674b1df2..d8d8620198 100644
--- a/io/sys/stat.h
+++ b/io/sys/stat.h
@@ -138,6 +138,16 @@ __BEGIN_DECLS
# endif
#endif
+/* These are from POSIX.1b. If the objects are not implemented using separate
+ distinct file types, the macros always will evaluate to zero. Unlike the
+ other S_* macros the following three take a pointer to a `struct stat'
+ object as the argument. */
+#ifdef __USE_POSIX199309
+# define S_TYPEISMQ(buf) __S_TYPEISMQ(buf)
+# define S_TYPEISSEM(buf) __S_TYPEISSEM(buf)
+# define S_TYPEISSHM(buf) __S_TYPEISSHM(buf)
+#endif
+
/* Protection bits. */