svn commit: r239857 - in stable/9/sys: kern sys

[Konstantin Belousov]

Author: kib
Date: Wed Aug 29 16:23:29 2012
New Revision: 239857
URL: http://svn.freebsd.org/changeset/base/239857

Log:
  MFC r238834:
  Add F_DUP2FD_CLOEXEC.
  
  PR:	standards/169962

Modified:
  stable/9/sys/kern/kern_descrip.c
  stable/9/sys/sys/fcntl.h
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/kern/kern_descrip.c
==============================================================================
--- stable/9/sys/kern/kern_descrip.c	Wed Aug 29 16:17:02 2012	(r239856)
+++ stable/9/sys/kern/kern_descrip.c	Wed Aug 29 16:23:29 2012	(r239857)
@@ -498,6 +498,12 @@ kern_fcntl(struct thread *td, int fd, in
 		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 @@ do_dup(struct thread *td, int flags, int
 	}
 	if (flags & DUP_FIXED && old == new) {
 		*retval = new;
+		if (flags & DUP_CLOEXEC)
+			fdp->fd_ofileflags[new] |= UF_EXCLOSE;
 		FILEDESC_XUNLOCK(fdp);
 		return (0);
 	}

Modified: stable/9/sys/sys/fcntl.h
==============================================================================
--- stable/9/sys/sys/fcntl.h	Wed Aug 29 16:17:02 2012	(r239856)
+++ stable/9/sys/sys/fcntl.h	Wed Aug 29 16:23:29 2012	(r239857)
@@ -228,6 +228,9 @@ typedef	__pid_t		pid_t;
 #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 */