8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
283 lines
7.0 KiB
C
283 lines
7.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1986, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)reboot.c 8.1 (Berkeley) 6/5/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/reboot.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <signal.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <syslog.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <utmpx.h>
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static void usage(void);
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static u_int get_pageins(void);
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static int dohalt;
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int
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main(int argc, char *argv[])
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{
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struct utmpx utx;
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const struct passwd *pw;
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int ch, howto, i, fd, lflag, nflag, qflag, sverrno, Nflag;
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u_int pageins;
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const char *user, *kernel = NULL;
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if (strcmp(getprogname(), "halt") == 0) {
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dohalt = 1;
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howto = RB_HALT;
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} else
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howto = 0;
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lflag = nflag = qflag = Nflag = 0;
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while ((ch = getopt(argc, argv, "cdk:lNnpqr")) != -1)
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switch(ch) {
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case 'c':
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howto |= RB_POWERCYCLE;
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break;
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case 'd':
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howto |= RB_DUMP;
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break;
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case 'k':
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kernel = optarg;
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break;
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case 'l':
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lflag = 1;
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break;
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case 'n':
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nflag = 1;
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howto |= RB_NOSYNC;
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break;
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case 'N':
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nflag = 1;
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Nflag = 1;
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break;
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case 'p':
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howto |= RB_POWEROFF;
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break;
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case 'q':
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qflag = 1;
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break;
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case 'r':
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howto |= RB_REROOT;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT))
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errx(1, "cannot dump (-d) when halting; must reboot instead");
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if (Nflag && (howto & RB_NOSYNC) != 0)
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errx(1, "-N cannot be used with -n");
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if ((howto & RB_POWEROFF) && (howto & RB_POWERCYCLE))
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errx(1, "-c and -p cannot be used together");
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if ((howto & RB_REROOT) != 0 && howto != RB_REROOT)
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errx(1, "-r cannot be used with -c, -d, -n, or -p");
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if (geteuid()) {
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errno = EPERM;
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err(1, NULL);
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}
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if (qflag) {
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reboot(howto);
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err(1, NULL);
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}
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if (kernel != NULL) {
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fd = open("/boot/nextboot.conf", O_WRONLY | O_CREAT | O_TRUNC,
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0444);
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if (fd > -1) {
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(void)write(fd, "nextboot_enable=\"YES\"\n", 22);
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(void)write(fd, "kernel=\"", 8L);
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(void)write(fd, kernel, strlen(kernel));
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(void)write(fd, "\"\n", 2);
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close(fd);
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}
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}
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/* Log the reboot. */
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if (!lflag) {
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if ((user = getlogin()) == NULL)
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user = (pw = getpwuid(getuid())) ?
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pw->pw_name : "???";
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if (dohalt) {
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openlog("halt", 0, LOG_AUTH | LOG_CONS);
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syslog(LOG_CRIT, "halted by %s", user);
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} else if (howto & RB_REROOT) {
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openlog("reroot", 0, LOG_AUTH | LOG_CONS);
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syslog(LOG_CRIT, "rerooted by %s", user);
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} else if (howto & RB_POWEROFF) {
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openlog("reboot", 0, LOG_AUTH | LOG_CONS);
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syslog(LOG_CRIT, "powered off by %s", user);
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} else if (howto & RB_POWERCYCLE) {
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openlog("reboot", 0, LOG_AUTH | LOG_CONS);
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syslog(LOG_CRIT, "power cycled by %s", user);
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} else {
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openlog("reboot", 0, LOG_AUTH | LOG_CONS);
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syslog(LOG_CRIT, "rebooted by %s", user);
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}
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}
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utx.ut_type = SHUTDOWN_TIME;
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gettimeofday(&utx.ut_tv, NULL);
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pututxline(&utx);
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/*
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* Do a sync early on, so disks start transfers while we're off
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* killing processes. Don't worry about writes done before the
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* processes die, the reboot system call syncs the disks.
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*/
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if (!nflag)
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sync();
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/*
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* Ignore signals that we can get as a result of killing
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* parents, group leaders, etc.
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*/
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(void)signal(SIGHUP, SIG_IGN);
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(void)signal(SIGINT, SIG_IGN);
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(void)signal(SIGQUIT, SIG_IGN);
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(void)signal(SIGTERM, SIG_IGN);
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(void)signal(SIGTSTP, SIG_IGN);
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/*
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* If we're running in a pipeline, we don't want to die
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* after killing whatever we're writing to.
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*/
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(void)signal(SIGPIPE, SIG_IGN);
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/*
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* Only init(8) can perform rerooting.
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*/
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if (howto & RB_REROOT) {
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if (kill(1, SIGEMT) == -1)
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err(1, "SIGEMT init");
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return (0);
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}
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/* Just stop init -- if we fail, we'll restart it. */
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if (kill(1, SIGTSTP) == -1)
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err(1, "SIGTSTP init");
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/* Send a SIGTERM first, a chance to save the buffers. */
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if (kill(-1, SIGTERM) == -1 && errno != ESRCH)
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err(1, "SIGTERM processes");
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/*
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* After the processes receive the signal, start the rest of the
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* buffers on their way. Wait 5 seconds between the SIGTERM and
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* the SIGKILL to give everybody a chance. If there is a lot of
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* paging activity then wait longer, up to a maximum of approx
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* 60 seconds.
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*/
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sleep(2);
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for (i = 0; i < 20; i++) {
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pageins = get_pageins();
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if (!nflag)
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sync();
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sleep(3);
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if (get_pageins() == pageins)
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break;
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}
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for (i = 1;; ++i) {
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if (kill(-1, SIGKILL) == -1) {
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if (errno == ESRCH)
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break;
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goto restart;
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}
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if (i > 5) {
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(void)fprintf(stderr,
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"WARNING: some process(es) wouldn't die\n");
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break;
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}
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(void)sleep(2 * i);
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}
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reboot(howto);
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/* FALLTHROUGH */
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restart:
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sverrno = errno;
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errx(1, "%s%s", kill(1, SIGHUP) == -1 ? "(can't restart init): " : "",
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strerror(sverrno));
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/* NOTREACHED */
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, dohalt ?
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"usage: halt [-clNnpq] [-k kernel]\n" :
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"usage: reboot [-cdlNnpqr] [-k kernel]\n");
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exit(1);
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}
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static u_int
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get_pageins(void)
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{
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u_int pageins;
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size_t len;
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len = sizeof(pageins);
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if (sysctlbyname("vm.stats.vm.v_swappgsin", &pageins, &len, NULL, 0)
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!= 0) {
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warnx("v_swappgsin");
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return (0);
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}
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return pageins;
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}
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