--- src/cmd/ksh93/bltins/read.c
+++ src/cmd/ksh93/bltins/read.c	2008-12-17 14:01:01.000000000 +0000
@@ -263,6 +263,19 @@ int sh_readline(register Shell_t *shp,ch
 			delim = ((unsigned)flags)>>D_FLAG;
 		if(shp->fdstatus[fd]&IOTTY)
 			tty_raw(fd,1);
+#if (defined(__s390__) || defined(__s390x__)) && defined(__linux__)
+		else if (flags&N_FLAG)
+		{
+			struct stat st;
+			if ((fstat(fd, &st) == 0) && S_ISFIFO(st.st_mode))
+			{
+				int fdflg;
+				if (((fdflg = fcntl(fd, F_GETFL)) != -1) && !(fdflg & O_NONBLOCK))
+					fcntl(fd, F_SETFL, fdflg|O_NONBLOCK);
+				shp->fdstatus[fd] |= IONOSEEK;
+			}
+		}
+#endif
 	}
 	binary = nv_isattr(np,NV_BINARY);
 	if(!binary && !(flags&(N_FLAG|NN_FLAG)))