3665 Implement O_CLOEXEC as an open() flag
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Gordon Ross <gwr@nexenta.com>
Reviewed by: Dan McDonald <danmcd@nexenta.com>

@@ -25,10 +25,13 @@
 
 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
 /*        All Rights Reserved   */
 
 /*
+ * Copyright (c) 2013, OmniTI Computer Consulting, Inc. All rights reserved.
+ */
+/*
  * Portions of this source code were derived from Berkeley 4.3 BSD
  * under license from the Regents of the University of California.
  */
 
 #include <sys/param.h>

@@ -224,10 +227,13 @@
                                         /*
                                          * We must now fill in the slot
                                          * falloc reserved.
                                          */
                                         setf(fd, fp);
+                                        if ((filemode & FCLOEXEC) != 0) {
+                                                f_setfd(fd, FD_CLOEXEC);
+                                        }
                                         return (fd);
                                 } else {
                                         /*
                                          * Special handling for /dev/fd.
                                          * Give up the file pointer

@@ -250,10 +256,13 @@
                                         }
                                         mutex_enter(&fp->f_tlock);
                                         fp->f_count++;
                                         mutex_exit(&fp->f_tlock);
                                         setf(fd, fp);
+                                        if ((filemode & FCLOEXEC) != 0) {
+                                                f_setfd(fd, FD_CLOEXEC);
+                                        }
                                         releasef(dupfd);
                                 }
                                 return (fd);
                         } else {
                                 setf(fd, NULL);