diff --git a/sh.func.c b/sh.func.c
index a9c0dd6f..5a996871 100644
--- a/sh.func.c
+++ b/sh.func.c
@@ -1353,8 +1353,21 @@ dosetenv(Char **v, struct command *c)
     if (*lp != '\0')
 	stderror(ERR_NAME | ERR_VARALNUM);
 
-    if ((lp = *v++) == 0)
-	lp = STRNULL;
+    if ((lp = *v++) == 0) {
+	if (c->t_dlef || !isatty(OLDSTD)) {
+	    Char c;
+	    struct Strbuf s = Strbuf_INIT;
+
+	    while (wide_read(0, &c, (size_t) 1, 0) > 0) {
+		if (c == '\n')
+		    break;
+		Strbuf_append1(&s, c | QUOTE);
+	    }
+	    Strbuf_terminate(&s);
+	    lp = s.s;
+	} else
+	    lp = STRNULL;
+    }
 
     lp = globone(lp, G_APPEND);
     cleanup_push(lp, xfree);
diff --git a/sh.sem.c b/sh.sem.c
index 0674a2e3..d5781896 100644
--- a/sh.sem.c
+++ b/sh.sem.c
@@ -367,23 +367,13 @@ execute(struct command *t, volatile int wanttty, int *pipein, int *pipeout,
 	if (bifunc && (t->t_dflg & F_PIPEIN))
 	    t->t_dflg &= ~(F_NOFORK);
 #endif /* BACKPIPE */
-	/*
-	 * Prevent forking cd, pushd, popd, chdir cause this will cause the
-	 * shell not to change dir! (XXX: but only for nice?)
-	 */
-	if (bifunc && (bifunc->bfunct == (bfunc_t)dochngd ||
-		       bifunc->bfunct == (bfunc_t)dopushd ||
-		       bifunc->bfunct == (bfunc_t)dopopd))
-	    t->t_dflg &= ~(F_NICE);
-
 	if (((t->t_dflg & F_TIME) || ((t->t_dflg & F_NOFORK) == 0 &&
 	     (!bifunc || t->t_dflg &
 	      (F_PIPEOUT | F_AMPERSAND | F_NICE | F_NOHUP | F_HUP)))) ||
 	/*
-	 * We have to fork for eval too.
+	 * We have to fork for piped built-ins too.
 	 */
-	    (bifunc && (t->t_dflg & F_PIPEIN) != 0 &&
-	     bifunc->bfunct == (bfunc_t)doeval)) {
+	    (bifunc && (t->t_dflg & F_PIPEIN) != 0)) {
 #ifdef VFORK
 	    if (t->t_dtyp == NODE_PAREN ||
 		t->t_dflg & (F_REPEAT | F_AMPERSAND) || bifunc)
@@ -631,17 +621,6 @@ execute(struct command *t, volatile int wanttty, int *pipein, int *pipeout,
 	}
 
 	doio(t, pipein, pipeout);
-#ifdef BACKPIPE
-	if (t->t_dflg & F_PIPEIN) {
-	    xclose(pipein[0]);
-	    xclose(pipein[1]);
-	}
-#else /* !BACKPIPE */
-	if (t->t_dflg & F_PIPEOUT) {
-	    xclose(pipeout[0]);
-	    xclose(pipeout[1]);
-	}
-#endif /* BACKPIPE */
 	/*
 	 * Perform a builtin function. If we are not forked, arrange for
 	 * possible stopping
@@ -717,7 +696,6 @@ execute(struct command *t, volatile int wanttty, int *pipein, int *pipeout,
 	execute(t->t_dcdr, wanttty, pv, pipeout, do_glob);
 #endif /* BACKPIPE */
 	break;
-
     case NODE_LIST:
 	if (t->t_dcar) {
 	    t->t_dcar->t_dflg |= t->t_dflg & (F_NOINTERRUPT | F_BACKQ);
@@ -871,8 +849,7 @@ doio(struct command *t, int *pipein, int *pipeout)
 	}
 	else if (flags & F_PIPEIN) {
 	    xclose(0);
-	    TCSH_IGNORE(dup(pipein[0]));
-	    xclose(pipein[0]);
+	    (void) dmove(pipein[0], 0);
 	    xclose(pipein[1]);
 	}
 	else if ((flags & F_NOINTERRUPT) && tpgrp == -1) {
@@ -934,7 +911,7 @@ doio(struct command *t, int *pipein, int *pipeout)
     }
     else if (flags & F_PIPEOUT) {
 	xclose(1);
-	TCSH_IGNORE(dup(pipeout[1]));
+	(void) dcopy(pipeout[1], 1);
 	is1atty = 0;
     }
     else {
@@ -948,7 +925,7 @@ doio(struct command *t, int *pipein, int *pipeout)
 
     xclose(2);
     if (flags & F_STDERR) {
-	TCSH_IGNORE(dup(1));
+	(void) dcopy(1, 2);
 	is2atty = is1atty;
     }
     else {
diff --git a/sh.set.c b/sh.set.c
index ac73af9f..5d28c59f 100644
--- a/sh.set.c
+++ b/sh.set.c
@@ -248,7 +248,7 @@ doset(Char **v, struct command *c)
     int	    flags = VAR_READWRITE;
     int    first_match = 0;
     int    last_match = 0;
-    int    changed = 0;
+    int    changed, pipe;
 
     USE(c);
     v++;
@@ -278,7 +278,13 @@ doset(Char **v, struct command *c)
 	plist(&shvhed, flags);
 	return;
     }
+    pipe = 0;
+    if (c->t_dlef || !isatty(OLDSTD))
+	pipe = 1;
     do {
+	Char c;
+	struct Strbuf s;
+
 	hadsub = 0;
 	vp = p;
 	if (!letter(*p))
@@ -300,6 +306,7 @@ doset(Char **v, struct command *c)
 	else if (*v && eq(*v, STRequal)) {
 	    if (*++v != NULL)
 		p = *v++;
+	    pipe = 0;
 	}
 	if (eq(p, STRLparen)) {
 	    Char **e = v;
@@ -328,14 +335,45 @@ doset(Char **v, struct command *c)
 	else if (hadsub) {
 	    Char *copy;
 
-	    copy = Strsave(p);
+	    if (pipe) {
+		memset(&s, 0, sizeof s);
+		while (wide_read(0, &c, (size_t) 1, 0) > 0)
+		    Strbuf_append1(&s, c | QUOTE);
+		Strbuf_terminate(&s);
+		copy = s.s;
+	    } else
+		copy = Strsave(p);
 	    cleanup_push(copy, xfree);
 	    asx(vp, subscr, copy);
 	    cleanup_ignore(copy);
 	    cleanup_until(copy);
 	}
-	else
-	    setv(vp, Strsave(p), flags);
+	else {
+	    if (pipe) {
+		int empty = 1;
+
+		memset(&s, 0, sizeof s);
+		while (wide_read(0, &c, (size_t) 1, 0) > 0) {
+		    if (c == '\n') {
+			empty = 0;
+
+			break;
+		    }
+		    Strbuf_append1(&s, c | QUOTE);
+		}
+		if (empty && s.s == NULL) {
+		    Char **empty;
+
+		    empty = xcalloc(1, sizeof *empty);
+		    set1(vp, empty, &shvhed, flags);
+		}
+		else {
+		    Strbuf_terminate(&s);
+		    setv(vp, s.s, flags);
+		}
+	    } else
+		setv(vp, Strsave(p), flags);
+	}
 	update_vars(vp);
     } while ((p = *v++) != NULL);
 }