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2007-10-17 Roland McGrath <roland@frob.com>

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* sysdeps/mach/hurd/bits/fcntl.h [__USE_GNU__] (F_DUPFD_CLOEXEC): New.
	* sysdeps/mach/hurd/fcntl.c (__libc_fcntl): Implement it.
This commit is contained in:
Roland McGrath 2007-10-17 22:32:35 +00:00
parent f71cda6a38
commit bd92328d5e
2 changed files with 14 additions and 3 deletions
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5
sysdeps/mach/hurd/bits/fcntl.h
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@ -163,6 +163,11 @@
#define F_SETLK 8 /* Set record locking info (non-blocking). */
#define F_SETLKW 9 /* Set record locking info (blocking). */
#ifdef __USE_GNU
# define F_DUPFD_CLOEXEC 1030 /* Duplicate, set FD_CLOEXEC on new one. */
#endif
/* File descriptor flags used with F_GETFD and F_SETFD. */
#define FD_CLOEXEC 1 /* Close on exec. */

12
sysdeps/mach/hurd/fcntl.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1992-1997,1999,2000,2002 Free Software Foundation, Inc.
/* Copyright (C) 1992-1997,1999,2000,2002,2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -50,6 +50,7 @@ __libc_fcntl (int fd, int cmd, ...)
/* First the descriptor-based commands, which do no RPCs. */
case F_DUPFD: /* Duplicate the file descriptor. */
case F_DUPFD_CLOEXEC:
{
struct hurd_fd *new;
io_t port, ctty;
@ -64,6 +65,12 @@ __libc_fcntl (int fd, int cmd, ...)
ctty = _hurd_port_get (&d->ctty, &ctty_ulink);
port = _hurd_port_locked_get (&d->port, &ulink); /* Unlocks D. */
if (cmd == F_DUPFD_CLOEXEC)
flags |= FD_CLOEXEC;
else
/* Duplication clears the FD_CLOEXEC flag. */
flags &= ~FD_CLOEXEC;
/* Get a new file descriptor. The third argument to __fcntl is the
minimum file descriptor number for it. */
new = _hurd_alloc_fd (&result, va_arg (ap, int));
@ -82,8 +89,7 @@ __libc_fcntl (int fd, int cmd, ...)
/* Install the ports and flags in the new descriptor. */
if (ctty != MACH_PORT_NULL)
_hurd_port_set (&new->ctty, ctty);
/* Duplication clears the FD_CLOEXEC flag. */
new->flags = flags & ~FD_CLOEXEC;
new->flags = flags;
_hurd_port_locked_set (&new->port, port); /* Unlocks NEW. */
}