[Midnightbsd-cvs] src [7938] trunk/sys: add F_DUP2FD_CLOEXEC

[laffer1 at midnightbsd.org]

Revision: 7938
          http://svnweb.midnightbsd.org/src/?rev=7938
Author:   laffer1
Date:     2016-09-14 17:36:45 -0400 (Wed, 14 Sep 2016)
Log Message:
-----------
add F_DUP2FD_CLOEXEC

Modified Paths:
--------------
    trunk/sys/kern/kern_descrip.c
    trunk/sys/sys/fcntl.h

Modified: trunk/sys/kern/kern_descrip.c
===================================================================
--- trunk/sys/kern/kern_descrip.c	2016-09-14 21:35:29 UTC (rev 7937)
+++ trunk/sys/kern/kern_descrip.c	2016-09-14 21:36:45 UTC (rev 7938)
@@ -498,6 +498,12 @@
 		error = do_dup(td, DUP_FIXED, fd, tmp, td->td_retval);
 		break;
 
+	case F_DUP2FD_CLOEXEC:
+		tmp = arg;
+		error = do_dup(td, DUP_FIXED | DUP_CLOEXEC, fd, tmp,
+		    td->td_retval);
+		break;
+
 	case F_GETFD:
 		FILEDESC_SLOCK(fdp);
 		if ((fp = fdtofp(fd, fdp)) == NULL) {
@@ -836,6 +842,8 @@
 	}
 	if (flags & DUP_FIXED && old == new) {
 		*retval = new;
+		if (flags & DUP_CLOEXEC)
+			fdp->fd_ofileflags[new] |= UF_EXCLOSE;
 		FILEDESC_XUNLOCK(fdp);
 		return (0);
 	}

Modified: trunk/sys/sys/fcntl.h
===================================================================
--- trunk/sys/sys/fcntl.h	2016-09-14 21:35:29 UTC (rev 7937)
+++ trunk/sys/sys/fcntl.h	2016-09-14 21:36:45 UTC (rev 7938)
@@ -228,6 +228,9 @@
 #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200809
 #define	F_DUPFD_CLOEXEC	17		/* Like F_DUPFD, but FD_CLOEXEC is set */
 #endif
+#if __BSD_VISIBLE
+#define	F_DUP2FD_CLOEXEC 18		/* Like F_DUP2FD, but FD_CLOEXEC is set */
+#endif
 
 /* file descriptor flags (F_GETFD, F_SETFD) */
 #define	FD_CLOEXEC	1		/* close-on-exec flag */