2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/* $NetBSD: ntp_adjtime.c,v 1.11 2007/11/23 12:39:15 uebayasi Exp $ */
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/*
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: ntp_adjtime.c,v 1.11 2007/11/23 12:39:15 uebayasi Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/timex.h>
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#include <sys/ioctl.h>
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#include <sys/syscall.h>
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#include <sys/clockctl.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef __weak_alias
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__weak_alias(ntp_adjtime,_ntp_adjtime)
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#endif
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extern int __clockctl_fd;
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int __ntp_adjtime(struct timex *);
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int
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ntp_adjtime(tp)
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struct timex *tp;
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{
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struct clockctl_ntp_adjtime args;
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int error;
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int rv;
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/*
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* we always attempt to use the syscall unless we had to
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* use the clockctl device before
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*
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* ntp_adjtime() is callable for mortals if tp->modes == 0 !
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*/
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if (__clockctl_fd == -1) {
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rv = __ntp_adjtime(tp);
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/*
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* if we fail with EPERM we try the clockctl device
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*/
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if (rv != -1 || errno != EPERM)
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return rv;
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/*
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* If this fails, it means that we are not root
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* and we cannot open clockctl. This is a true
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* failure.
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*/
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__clockctl_fd = open(_PATH_CLOCKCTL, O_WRONLY, 0);
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if (__clockctl_fd == -1) {
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/* original error was EPERM - don't leak open errors */
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errno = EPERM;
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return -1;
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}
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(void) fcntl(__clockctl_fd, F_SETFD, FD_CLOEXEC);
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}
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/*
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* If __clockctl_fd >=0, clockctl has already been open
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* and used, so we carry on using it.
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*/
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args.tp = tp;
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error = ioctl(__clockctl_fd, CLOCKCTL_NTP_ADJTIME, &args);
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/*
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* There is no way to get retval set through ioctl(), hence we
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* have to handle it here, using args.retval
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*/
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if (error == 0) {
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rv = (int)args.retval;
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return rv;
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}
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return error;
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}
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