lib: Add SAFE_MKFIFO()

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
diff --git a/lib/safe_macros.c b/lib/safe_macros.c
index f482e01..13cc08e 100644
--- a/lib/safe_macros.c
+++ b/lib/safe_macros.c
@@ -737,3 +737,19 @@
 
 	return rval;
 }
+
+int safe_mkfifo(const char *file, const int lineno,
+                void (*cleanup_fn)(void), const char *pathname, mode_t mode)
+{
+	int rval;
+
+	rval = mkfifo(pathname, mode);
+
+	if (rval == -1) {
+		tst_brkm(TBROK | TERRNO, cleanup_fn,
+		         "%s:%d: mkfifo(%s, 0%o) failed",
+			 file, lineno, pathname, mode);
+	}
+
+	return rval;
+}