diff -ur netbsd-sh/eval.c netbsd-sh-/eval.c
--- netbsd-sh/eval.c	Tue May 23 12:03:18 2000
+++ netbsd-sh-/eval.c	Mon Apr 23 23:33:34 2001
@@ -442,6 +442,7 @@
 		case NFROM:
 		case NTO:
 		case NAPPEND:
+		case NTOOV:
 			expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR);
 			redir->nfile.expfname = fn.list->text;
 			break;
diff -ur netbsd-sh/exec.c netbsd-sh-/exec.c
--- netbsd-sh/exec.c	Fri Jan 12 17:50:35 2001
+++ netbsd-sh-/exec.c	Mon Apr 23 23:33:34 2001
@@ -125,6 +125,10 @@
 	char *cmdname;
 	int e;
 
+	if (fd2 >= 0 && fd2 != 2) {
+		close(fd2);
+	}
+
 	if (strchr(argv[0], '/') != NULL) {
 		tryexec(argv[0], argv, envp);
 		e = errno;
diff -ur netbsd-sh/jobs.c netbsd-sh-/jobs.c
--- netbsd-sh/jobs.c	Mon Apr 23 23:34:53 2001
+++ netbsd-sh-/jobs.c	Mon Apr 23 23:34:30 2001
@@ -129,9 +129,9 @@
 	if (on) {
 		do { /* while we are in the background */
 #ifdef OLD_TTY_DRIVER
-			if (ioctl(2, TIOCGPGRP, (char *)&initialpgrp) < 0) {
+			if (ioctl(fd2, TIOCGPGRP, (char *)&initialpgrp) < 0) {
 #else
-			initialpgrp = tcgetpgrp(2);
+			initialpgrp = tcgetpgrp(fd2);
 			if (initialpgrp < 0) {
 #endif
 				out2str("sh: can't access tty; job control turned off\n");
@@ -146,7 +146,7 @@
 			}
 		} while (0);
 #ifdef OLD_TTY_DRIVER
-		if (ioctl(2, TIOCGETD, (char *)&ldisc) < 0 || ldisc != NTTYDISC) {
+		if (ioctl(fd2, TIOCGETD, (char *)&ldisc) < 0 || ldisc != NTTYDISC) {
 			out2str("sh: need new tty driver to run job control; job control turned off\n");
 			mflag = 0;
 			return;
@@ -157,16 +157,16 @@
 		setsignal(SIGTTIN);
 		setpgid(0, rootpid);
 #ifdef OLD_TTY_DRIVER
-		ioctl(2, TIOCSPGRP, (char *)&rootpid);
+		ioctl(fd2, TIOCSPGRP, (char *)&rootpid);
 #else
-		tcsetpgrp(2, rootpid);
+		tcsetpgrp(fd2, rootpid);
 #endif
 	} else { /* turning job control off */
 		setpgid(0, initialpgrp);
 #ifdef OLD_TTY_DRIVER
-		ioctl(2, TIOCSPGRP, (char *)&initialpgrp);
+		ioctl(fd2, TIOCSPGRP, (char *)&initialpgrp);
 #else
-		tcsetpgrp(2, initialpgrp);
+		tcsetpgrp(fd2, initialpgrp);
 #endif
 		setsignal(SIGTSTP);
 		setsignal(SIGTTOU);
@@ -206,9 +206,9 @@
 		error("job not created under job control");
 	pgrp = jp->ps[0].pid;
 #ifdef OLD_TTY_DRIVER
-	ioctl(2, TIOCSPGRP, (char *)&pgrp);
+	ioctl(fd2, TIOCSPGRP, (char *)&pgrp);
 #else
-	tcsetpgrp(2, pgrp);
+	tcsetpgrp(fd2, pgrp);
 #endif
 	restartjob(jp);
 	INTOFF;
@@ -612,10 +612,10 @@
 			if (mode == FORK_FG) {
 				/*** this causes superfluous TIOCSPGRPS ***/
 #ifdef OLD_TTY_DRIVER
-				if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0)
+				if (ioctl(fd2, TIOCSPGRP, (char *)&pgrp) < 0)
 					error("TIOCSPGRP failed, errno=%d", errno);
 #else
-				if (tcsetpgrp(2, pgrp) < 0)
+				if (tcsetpgrp(fd2, pgrp) < 0)
 					error("tcsetpgrp failed, errno=%d", errno);
 #endif
 			}
@@ -734,10 +734,10 @@
 #if JOBS
 	if (jp->jobctl) {
 #ifdef OLD_TTY_DRIVER
-		if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0)
+		if (ioctl(fd2, TIOCSPGRP, (char *)&mypgrp) < 0)
 			error("TIOCSPGRP failed, errno=%d\n", errno);
 #else
-		if (tcsetpgrp(2, mypgrp) < 0)
+		if (tcsetpgrp(fd2, mypgrp) < 0)
 			error("tcsetpgrp failed, errno=%d\n", errno);
 #endif
 	}
@@ -1092,6 +1092,8 @@
 		p = ">>";  i = 1;  goto redir;
 	case NTOFD:
 		p = ">&";  i = 1;  goto redir;
+	case NTOOV:
+		p = ">|";  i = 1;  goto redir;
 	case NFROM:
 		p = "<";  i = 0;  goto redir;
 	case NFROMFD:
Only in netbsd-sh-: jobs.c.orig
diff -ur netbsd-sh/nodetypes netbsd-sh-/nodetypes
--- netbsd-sh/nodetypes	Fri Feb  5 13:04:52 1999
+++ netbsd-sh-/nodetypes	Mon Apr 23 23:33:34 2001
@@ -119,6 +119,7 @@
 NFROM nfile			# fd< fname
 NFROMTO nfile			# fd<> fname
 NAPPEND nfile			# fd>> fname
+NTOOV nfile			# fd>| fname
 	type	  int
 	next	  nodeptr		# next redirection in list
 	fd	  int			# file descriptor being redirected
diff -ur netbsd-sh/parser.c netbsd-sh-/parser.c
--- netbsd-sh/parser.c	Fri Jan 12 17:50:39 2001
+++ netbsd-sh-/parser.c	Mon Apr 23 23:33:34 2001
@@ -1125,6 +1125,8 @@
 			np->type = NAPPEND;
 		else if (c == '&')
 			np->type = NTOFD;
+		else if (c == '|')
+			np->type = NTOOV;
 		else {
 			np->type = NTO;
 			pungetc();
diff -ur netbsd-sh/redir.c netbsd-sh-/redir.c
--- netbsd-sh/redir.c	Tue May 23 12:03:19 2000
+++ netbsd-sh-/redir.c	Mon Apr 23 23:33:34 2001
@@ -45,6 +45,7 @@
 #endif
 #endif /* not lint */
 
+#include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/param.h>	/* PIPE_BUF */
 #include <signal.h>
@@ -66,6 +67,7 @@
 #include "output.h"
 #include "memalloc.h"
 #include "error.h"
+#include "options.h"
 
 
 #define EMPTY -2		/* marks an unused slot in redirtab */
@@ -92,8 +94,15 @@
 */
 int fd0_redirected = 0;
 
-STATIC void openredirect __P((union node *, char[10 ]));
+/*
+ * We also keep track of where fd2 goes.
+ */
+int fd2 = 2;
+
+STATIC int openredirect __P((union node *));
+STATIC void dupredirect __P((union node *, int, char[10 ]));
 STATIC int openhere __P((union node *));
+STATIC int noclobberopen __P((const char *));
 
 
 /*
@@ -113,6 +122,7 @@
 	struct redirtab *sv = NULL;
 	int i;
 	int fd;
+	int newfd;
 	int try;
 	char memory[10];	/* file descriptors to write to memory */
 
@@ -133,36 +143,47 @@
 		    n->ndup.dupfd == fd)
 			continue; /* redirect from/to same file descriptor */
 
-		if ((flags & REDIR_PUSH) && sv->renamed[fd] == EMPTY) {
-			INTOFF;
-again:
-			if ((i = fcntl(fd, F_DUPFD, 10)) == -1) {
+		INTOFF;
+		newfd = openredirect(n);
+		if (((flags & REDIR_PUSH) && sv->renamed[fd] == EMPTY) ||
+		    (fd == fd2)) {
+			if (newfd == fd) {
+				try++;
+			} else if ((i = fcntl(fd, F_DUPFD, 10)) == -1) {
 				switch (errno) {
 				case EBADF:
 					if (!try) {
-						openredirect(n, memory);
+						dupredirect(n, newfd, memory);
 						try++;
-						goto again;
+						break;
 					}
 					/* FALLTHROUGH*/
 				default:
+					if (newfd >= 0) {
+						close(newfd);
+					}
 					INTON;
 					error("%d: %s", fd, strerror(errno));
 					/* NOTREACHED */
 				}
 			}
 			if (!try) {
-				sv->renamed[fd] = i;
 				close(fd);
+				if (flags & REDIR_PUSH) {
+					sv->renamed[fd] = i;
+				}
+				if (fd == fd2) {
+					fd2 = i;
+				}
 			}
-			INTON;
-		} else {
+		} else if (fd != newfd) {
 			close(fd);
 		}
                 if (fd == 0)
                         fd0_redirected++;
 		if (!try)
-			openredirect(n, memory);
+			dupredirect(n, newfd, memory);
+		INTON;
 	}
 	if (memory[1])
 		out1 = &memout;
@@ -171,22 +192,13 @@
 }
 
 
-STATIC void
-openredirect(redir, memory)
+STATIC int
+openredirect(redir)
 	union node *redir;
-	char memory[10];
 	{
-	int fd = redir->nfile.fd;
 	char *fname;
 	int f;
 
-	/*
-	 * We suppress interrupts so that we won't leave open file
-	 * descriptors around.  This may not be such a good idea because
-	 * an open of a device or a fifo can block indefinitely.
-	 */
-	INTOFF;
-	memory[fd] = 0;
 	switch (redir->nfile.type) {
 	case NFROM:
 		fname = redir->nfile.expfname;
@@ -199,6 +211,14 @@
 			goto ecreate;
 		break;
 	case NTO:
+		/* Take care of noclobber mode. */
+		if (Cflag) {
+			fname = redir->nfile.expfname;
+			if ((f = noclobberopen(fname)) < 0)
+				goto ecreate;
+			break;
+		}
+	case NTOOV:
 		fname = redir->nfile.expfname;
 #ifdef O_CREAT
 		if ((f = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
@@ -222,32 +242,48 @@
 		break;
 	case NTOFD:
 	case NFROMFD:
+		f = -1;
+		break;
+	case NHERE:
+	case NXHERE:
+		f = openhere(redir);
+		break;
+	default:
+		abort();
+	}
+
+	return f;
+ecreate:
+	error("cannot create %s: %s", fname, errmsg(errno, E_CREAT));
+eopen:
+	error("cannot open %s: %s", fname, errmsg(errno, E_OPEN));
+}
+
+
+STATIC void
+dupredirect(redir, f, memory)
+	union node *redir;
+	int f;
+	char memory[10];
+	{
+	int fd = redir->nfile.fd;
+
+	memory[fd] = 0;
+	if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) {
 		if (redir->ndup.dupfd >= 0) {	/* if not ">&-" */
 			if (memory[redir->ndup.dupfd])
 				memory[fd] = 1;
 			else
 				copyfd(redir->ndup.dupfd, fd);
 		}
-		INTON;
 		return;
-	case NHERE:
-	case NXHERE:
-		f = openhere(redir);
-		break;
-	default:
-		abort();
 	}
 
 	if (f != fd) {
 		copyfd(f, fd);
 		close(f);
 	}
-	INTON;
 	return;
-ecreate:
-	error("cannot create %s: %s", fname, errmsg(errno, E_CREAT));
-eopen:
-	error("cannot open %s: %s", fname, errmsg(errno, E_OPEN));
 }
 
 
@@ -304,6 +340,7 @@
 	struct redirtab *rp = redirlist;
 	int i;
 
+	INTOFF;
 	for (i = 0 ; i < 10 ; i++) {
 		if (rp->renamed[i] != EMPTY) {
                         if (i == 0)
@@ -313,9 +350,11 @@
 				copyfd(rp->renamed[i], i);
 				close(rp->renamed[i]);
 			}
+			if (rp->renamed[i] == fd2) {
+				fd2 = i;
+			}
 		}
 	}
-	INTOFF;
 	redirlist = rp->next;
 	ckfree(rp);
 	INTON;
@@ -359,6 +398,9 @@
 		for (i = 0 ; i < 10 ; i++) {
 			if (rp->renamed[i] >= 0) {
 				close(rp->renamed[i]);
+				if (rp->renamed[i] == fd2) {
+					fd2 = -1;
+				}
 			}
 			rp->renamed[i] = EMPTY;
 		}
@@ -388,4 +430,63 @@
 			error("%d: %s", from, strerror(errno));
 	}
 	return newfd;
+}
+
+/*
+ * Open a file in noclobber mode.
+ * The code was copied from bash.
+ */
+int
+noclobberopen(fname)
+	const char *fname;
+{
+	int r, fd;
+	struct stat finfo, finfo2;
+
+	/*
+	 * If the file exists and is a regular file, return an error
+	 * immediately.
+	 */
+	r = stat(fname, &finfo);
+	if (r == 0 && S_ISREG(finfo.st_mode)) {
+		errno = EEXIST;
+		return -1;
+	}
+
+	/*
+	 * If the file was not present (r != 0), make sure we open it
+	 * exclusively so that if it is created before we open it, our open
+	 * will fail.  Make sure that we do not truncate an existing file.
+	 * Note that we don't turn on O_EXCL unless the stat failed -- if the
+	 * file was not a regular file, we leave O_EXCL off.
+	 */
+	if (r != 0)
+		return open(fname, O_WRONLY|O_CREAT|O_EXCL, 0666);
+	fd = open(fname, O_WRONLY|O_CREAT, 0666);
+
+	/* If the open failed, return the file descriptor right away. */
+	if (fd < 0)
+		return fd;
+
+	/*
+	 * OK, the open succeeded, but the file may have been changed from a
+	 * non-regular file to a regular file between the stat and the open.
+	 * We are assuming that the O_EXCL open handles the case where FILENAME
+	 * did not exist and is symlinked to an existing file between the stat
+	 * and open.
+	 */
+
+	/*
+	 * If we can open it and fstat the file descriptor, and neither check
+	 * revealed that it was a regular file, and the file has not been
+	 * replaced, return the file descriptor.
+	 */
+	 if (fstat(fd, &finfo2) == 0 && !S_ISREG(finfo2.st_mode) &&
+	     finfo.st_dev == finfo2.st_dev && finfo.st_ino == finfo2.st_ino)
+	 	return fd;
+
+	/* The file has been replaced.  badness. */
+	close(fd);
+	errno = EEXIST;
+	return -1;
 }
Only in netbsd-sh-: redir.c.orig
diff -ur netbsd-sh/redir.h netbsd-sh-/redir.h
--- netbsd-sh/redir.h	Tue May 23 12:03:19 2000
+++ netbsd-sh-/redir.h	Mon Apr 23 23:33:34 2001
@@ -42,6 +42,8 @@
 #define REDIR_PUSH 01		/* save previous values of file descriptors */
 #define REDIR_BACKQ 02		/* save the command output in memory */
 
+extern int fd2;
+
 union node;
 void redirect __P((union node *, int));
 void popredir __P((void));
diff -ur netbsd-sh/show.c netbsd-sh-/show.c
--- netbsd-sh/show.c	Sat Oct  9 13:02:09 1999
+++ netbsd-sh-/show.c	Mon Apr 23 23:33:34 2001
@@ -155,6 +155,7 @@
 			case NTO:	s = ">";  dftfd = 1; break;
 			case NAPPEND:	s = ">>"; dftfd = 1; break;
 			case NTOFD:	s = ">&"; dftfd = 1; break;
+			case NTOOV:	s = ">|"; dftfd = 1; break;
 			case NFROM:	s = "<";  dftfd = 0; break;
 			case NFROMFD:	s = "<&"; dftfd = 0; break;
 			case NFROMTO:	s = "<>"; dftfd = 0; break;