--- src/cmd/ksh93/bltins/read.c
+++ src/cmd/ksh93/bltins/read.c	2013-02-01 15:29:39.393452098 +0000
@@ -288,6 +288,19 @@ int sh_readline(register Shell_t *shp,ch
 			ep->e_nttyparm.c_lflag |= ISIG;
 			tty_set(fd,TCSADRAIN,&ep->e_nttyparm);
 		}
+#if defined(__linux__)
+		else if ((shp->fdstatus[fd]&(IOTTY|IONOSEEK))==0)
+		{
+			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)))