diff --git a/libc/bionic/lfs64_support.cpp b/libc/bionic/lfs64_support.cpp
index ab795f5..45d4f7f 100644
--- a/libc/bionic/lfs64_support.cpp
+++ b/libc/bionic/lfs64_support.cpp
@@ -17,11 +17,20 @@
 #include <ftw.h>
 #include <stdlib.h>
 
-int mkstemp64(char* filename) {
-  // Delegation will work in this case because all the transitive dependencies
-  // are already 64-bit ready. In particular, we don't have non-O_LARGEFILE
-  // open (our open is actually open64) and stat and stat64 are the same.
-  return mkstemp(filename);
+// Delegation will work in these cases because all the transitive dependencies
+// are already 64-bit ready. In particular, we don't have non-O_LARGEFILE
+// open (our open is actually open64) and stat and stat64 are the same.
+int mkstemp64(char* path) {
+  return mkstemp(path);
+}
+int mkostemp64(char* path, int flags) {
+  return mkostemp(path, flags);
+}
+int mkstemps64(char* path, int suffix_length) {
+  return mkstemps(path, suffix_length);
+}
+int mkostemps64(char* path, int suffix_length, int flags) {
+  return mkostemps(path, suffix_length, flags);
 }
 
 typedef int (*ftw_fn)(const char*, const struct stat*, int);
diff --git a/libc/include/fcntl.h b/libc/include/fcntl.h
index db56ce3..f57c320 100644
--- a/libc/include/fcntl.h
+++ b/libc/include/fcntl.h
@@ -46,6 +46,7 @@
 #endif
 
 #define O_ASYNC FASYNC
+#define O_RSYNC O_SYNC
 
 #define SPLICE_F_MOVE 1
 #define SPLICE_F_NONBLOCK 2
diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index 52f71dd..80a6578 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -59,8 +59,15 @@
 
 extern char* mkdtemp(char*);
 extern char* mktemp(char*) __warnattr("mktemp possibly used unsafely; consider using mkstemp");
-extern int mkstemp(char*);
+
+extern int mkostemp64(char*, int);
+extern int mkostemp(char*, int);
+extern int mkostemps64(char*, int, int);
+extern int mkostemps(char*, int, int);
 extern int mkstemp64(char*);
+extern int mkstemp(char*);
+extern int mkstemps64(char*, int);
+extern int mkstemps(char*, int);
 
 extern long strtol(const char *, char **, int);
 extern long long strtoll(const char *, char **, int);
diff --git a/libc/include/unistd.h b/libc/include/unistd.h
index 20bc1a3..475ee1af 100644
--- a/libc/include/unistd.h
+++ b/libc/include/unistd.h
@@ -169,9 +169,7 @@
 
 extern int dup(int);
 extern int dup2(int, int);
-#if defined(__USE_GNU)
 extern int dup3(int, int, int);
-#endif
 extern int fcntl(int, int, ...);
 extern int ioctl(int, int, ...);
 extern int flock(int, int);
diff --git a/libc/upstream-openbsd/lib/libc/stdio/fdopen.c b/libc/upstream-openbsd/lib/libc/stdio/fdopen.c
index 3e47f2c..1c0c813 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/fdopen.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/fdopen.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fdopen.c,v 1.6 2008/04/21 12:28:35 otto Exp $ */
+/*	$OpenBSD: fdopen.c,v 1.7 2014/08/31 02:21:18 guenther Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -66,6 +66,7 @@
 	if ((fp = __sfp()) == NULL)
 		return (NULL);
 	fp->_flags = flags;
+
 	/*
 	 * If opened for appending, but underlying descriptor does not have
 	 * O_APPEND bit set, assert __SAPP so that __swrite() will lseek to
@@ -73,6 +74,13 @@
 	 */
 	if ((oflags & O_APPEND) && !(fdflags & O_APPEND))
 		fp->_flags |= __SAPP;
+
+	/*
+	 * If close-on-exec was requested, then turn it on if not already
+	 */
+	if ((oflags & O_CLOEXEC) && !((tmp = fcntl(fd, F_GETFD)) & FD_CLOEXEC))
+		fcntl(fd, F_SETFD, tmp | FD_CLOEXEC);
+
 	fp->_file = fd;
 	fp->_cookie = fp;
 	fp->_read = __sread;
diff --git a/libc/upstream-openbsd/lib/libc/stdio/freopen.c b/libc/upstream-openbsd/lib/libc/stdio/freopen.c
index 3158fb1..82717b1 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/freopen.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/freopen.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: freopen.c,v 1.13 2009/11/09 00:18:27 kurt Exp $ */
+/*	$OpenBSD: freopen.c,v 1.14 2014/08/31 02:21:18 guenther Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -134,7 +134,7 @@
 	 * assume stderr is always fd STDERR_FILENO, even if being freopen'd.
 	 */
 	if (wantfd >= 0 && f != wantfd) {
-		if (dup2(f, wantfd) >= 0) {
+		if (dup3(f, wantfd, oflags & O_CLOEXEC) >= 0) {
 			(void) close(f);
 			f = wantfd;
 		}
diff --git a/libc/upstream-openbsd/lib/libc/stdio/mktemp.c b/libc/upstream-openbsd/lib/libc/stdio/mktemp.c
index cb154c4..2a17e52 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/mktemp.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/mktemp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mktemp.c,v 1.33 2014/05/06 22:55:27 millert Exp $ */
+/*	$OpenBSD: mktemp.c,v 1.34 2014/08/31 02:21:18 guenther Exp $ */
 /*
  * Copyright (c) 1996-1998, 2008 Theo de Raadt
  * Copyright (c) 1997, 2008-2009 Todd C. Miller
@@ -35,12 +35,14 @@
 #define NUM_CHARS	(sizeof(TEMPCHARS) - 1)
 #define MIN_X		6
 
+#define MKOTEMP_FLAGS	(O_APPEND | O_CLOEXEC | O_DSYNC | O_RSYNC | O_SYNC)
+
 #ifndef nitems
 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
 #endif
 
 static int
-mktemp_internal(char *path, int slen, int mode)
+mktemp_internal(char *path, int slen, int mode, int flags)
 {
 	char *start, *cp, *ep;
 	const char *tempchars = TEMPCHARS;
@@ -63,6 +65,12 @@
 		return(-1);
 	}
 
+	if (flags & ~MKOTEMP_FLAGS) {
+		errno = EINVAL;
+		return(-1);
+	}
+	flags |= O_CREAT | O_EXCL | O_RDWR;
+
 	tries = INT_MAX;
 	do {
 		cp = start;
@@ -85,7 +93,7 @@
 				return(errno == ENOENT ? 0 : -1);
 			break;
 		case MKTEMP_FILE:
-			fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR);
+			fd = open(path, flags, S_IRUSR|S_IWUSR);
 			if (fd != -1 || errno != EEXIST)
 				return(fd);
 			break;
@@ -107,7 +115,7 @@
 char *
 _mktemp(char *path)
 {
-	if (mktemp_internal(path, 0, MKTEMP_NAME) == -1)
+	if (mktemp_internal(path, 0, MKTEMP_NAME, 0) == -1)
 		return(NULL);
 	return(path);
 }
@@ -122,15 +130,27 @@
 }
 
 int
+mkostemps(char *path, int slen, int flags)
+{
+	return(mktemp_internal(path, slen, MKTEMP_FILE, flags));
+}
+
+int
 mkstemp(char *path)
 {
-	return(mktemp_internal(path, 0, MKTEMP_FILE));
+	return(mktemp_internal(path, 0, MKTEMP_FILE, 0));
+}
+
+int
+mkostemp(char *path, int flags)
+{
+	return(mktemp_internal(path, 0, MKTEMP_FILE, flags));
 }
 
 int
 mkstemps(char *path, int slen)
 {
-	return(mktemp_internal(path, slen, MKTEMP_FILE));
+	return(mktemp_internal(path, slen, MKTEMP_FILE, 0));
 }
 
 char *
@@ -138,6 +158,6 @@
 {
 	int error;
 
-	error = mktemp_internal(path, 0, MKTEMP_DIR);
+	error = mktemp_internal(path, 0, MKTEMP_DIR, 0);
 	return(error ? NULL : path);
 }