1 |
|
|
/* $OpenBSD: reboot.c,v 1.34 2015/01/16 06:40:00 deraadt Exp $ */ |
2 |
|
|
/* $NetBSD: reboot.c,v 1.8 1995/10/05 05:36:22 mycroft Exp $ */ |
3 |
|
|
|
4 |
|
|
/* |
5 |
|
|
* Copyright (c) 1980, 1986, 1993 |
6 |
|
|
* The Regents of the University of California. All rights reserved. |
7 |
|
|
* |
8 |
|
|
* Redistribution and use in source and binary forms, with or without |
9 |
|
|
* modification, are permitted provided that the following conditions |
10 |
|
|
* are met: |
11 |
|
|
* 1. Redistributions of source code must retain the above copyright |
12 |
|
|
* notice, this list of conditions and the following disclaimer. |
13 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
14 |
|
|
* notice, this list of conditions and the following disclaimer in the |
15 |
|
|
* documentation and/or other materials provided with the distribution. |
16 |
|
|
* 3. Neither the name of the University nor the names of its contributors |
17 |
|
|
* may be used to endorse or promote products derived from this software |
18 |
|
|
* without specific prior written permission. |
19 |
|
|
* |
20 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
21 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
22 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
23 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
24 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
25 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
26 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
27 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
28 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
29 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
30 |
|
|
* SUCH DAMAGE. |
31 |
|
|
*/ |
32 |
|
|
|
33 |
|
|
#include <sys/types.h> |
34 |
|
|
#include <sys/reboot.h> |
35 |
|
|
#include <sys/fcntl.h> |
36 |
|
|
#include <sys/sysctl.h> |
37 |
|
|
#include <sys/wait.h> |
38 |
|
|
#include <machine/cpu.h> |
39 |
|
|
#include <signal.h> |
40 |
|
|
#include <pwd.h> |
41 |
|
|
#include <errno.h> |
42 |
|
|
#include <err.h> |
43 |
|
|
#include <fcntl.h> |
44 |
|
|
#include <termios.h> |
45 |
|
|
#include <syslog.h> |
46 |
|
|
#include <unistd.h> |
47 |
|
|
#include <stdio.h> |
48 |
|
|
#include <stdlib.h> |
49 |
|
|
#include <string.h> |
50 |
|
|
#include <paths.h> |
51 |
|
|
#include <util.h> |
52 |
|
|
|
53 |
|
|
void usage(void); |
54 |
|
|
extern char *__progname; |
55 |
|
|
|
56 |
|
|
int dohalt; |
57 |
|
|
|
58 |
|
|
#define _PATH_RC "/etc/rc" |
59 |
|
|
|
60 |
|
|
int |
61 |
|
|
main(int argc, char *argv[]) |
62 |
|
|
{ |
63 |
|
|
unsigned int i; |
64 |
|
|
struct passwd *pw; |
65 |
|
|
int ch, howto, lflag, nflag, pflag, qflag; |
66 |
|
|
char *p, *user; |
67 |
|
|
sigset_t mask; |
68 |
|
|
|
69 |
|
|
p = __progname; |
70 |
|
|
|
71 |
|
|
/* Nuke login shell */ |
72 |
|
|
if (*p == '-') |
73 |
|
|
p++; |
74 |
|
|
|
75 |
|
|
howto = dohalt = lflag = nflag = pflag = qflag = 0; |
76 |
|
|
if (!strcmp(p, "halt")) { |
77 |
|
|
dohalt = 1; |
78 |
|
|
howto = RB_HALT; |
79 |
|
|
} |
80 |
|
|
|
81 |
|
|
while ((ch = getopt(argc, argv, "dlnpq")) != -1) |
82 |
|
|
switch (ch) { |
83 |
|
|
case 'd': |
84 |
|
|
howto |= RB_DUMP; |
85 |
|
|
break; |
86 |
|
|
case 'l': /* Undocumented; used by shutdown. */ |
87 |
|
|
lflag = 1; |
88 |
|
|
break; |
89 |
|
|
case 'n': |
90 |
|
|
nflag = 1; |
91 |
|
|
howto |= RB_NOSYNC; |
92 |
|
|
break; |
93 |
|
|
case 'p': |
94 |
|
|
/* Only works if we're called as halt. */ |
95 |
|
|
if (dohalt) { |
96 |
|
|
pflag = 1; |
97 |
|
|
howto |= RB_POWERDOWN; |
98 |
|
|
} |
99 |
|
|
break; |
100 |
|
|
case 'q': |
101 |
|
|
qflag = 1; |
102 |
|
|
break; |
103 |
|
|
default: |
104 |
|
|
usage(); |
105 |
|
|
} |
106 |
|
|
argc -= optind; |
107 |
|
|
argv += optind; |
108 |
|
|
|
109 |
|
|
if (argc) |
110 |
|
|
usage(); |
111 |
|
|
|
112 |
|
|
if (geteuid()) |
113 |
|
|
errx(1, "%s", strerror(EPERM)); |
114 |
|
|
|
115 |
|
|
#ifdef CPU_LIDSUSPEND |
116 |
|
|
if (howto & RB_POWERDOWN) { |
117 |
|
|
/* Disable suspending on laptop lid close */ |
118 |
|
|
int mib[2]; |
119 |
|
|
int lidsuspend = 0; |
120 |
|
|
|
121 |
|
|
mib[0] = CTL_MACHDEP; |
122 |
|
|
mib[1] = CPU_LIDSUSPEND; |
123 |
|
|
if (sysctl(mib, 2, NULL, NULL, &lidsuspend, |
124 |
|
|
sizeof(lidsuspend)) == -1 && errno != EOPNOTSUPP) |
125 |
|
|
warn("sysctl"); |
126 |
|
|
} |
127 |
|
|
#endif /* CPU_LIDSUSPEND */ |
128 |
|
|
|
129 |
|
|
if (qflag) { |
130 |
|
|
reboot(howto); |
131 |
|
|
err(1, "reboot"); |
132 |
|
|
} |
133 |
|
|
|
134 |
|
|
/* Log the reboot. */ |
135 |
|
|
if (!lflag) { |
136 |
|
|
if ((user = getlogin()) == NULL) |
137 |
|
|
user = (pw = getpwuid(getuid())) ? |
138 |
|
|
pw->pw_name : "???"; |
139 |
|
|
if (dohalt) { |
140 |
|
|
openlog("halt", 0, LOG_AUTH | LOG_CONS); |
141 |
|
|
if (pflag) { |
142 |
|
|
syslog(LOG_CRIT, |
143 |
|
|
"halted (with powerdown) by %s", user); |
144 |
|
|
} else { |
145 |
|
|
syslog(LOG_CRIT, "halted by %s", user); |
146 |
|
|
} |
147 |
|
|
} else { |
148 |
|
|
openlog("reboot", 0, LOG_AUTH | LOG_CONS); |
149 |
|
|
syslog(LOG_CRIT, "rebooted by %s", user); |
150 |
|
|
} |
151 |
|
|
} |
152 |
|
|
logwtmp("~", "shutdown", ""); |
153 |
|
|
|
154 |
|
|
/* |
155 |
|
|
* Do a sync early on, so disks start transfers while we're off |
156 |
|
|
* killing processes. Don't worry about writes done before the |
157 |
|
|
* processes die, the reboot system call syncs the disks. |
158 |
|
|
*/ |
159 |
|
|
if (!nflag) |
160 |
|
|
sync(); |
161 |
|
|
|
162 |
|
|
/* Just stop init -- if we fail, we'll restart it. */ |
163 |
|
|
if (kill(1, SIGTSTP) == -1) |
164 |
|
|
err(1, "SIGTSTP init"); |
165 |
|
|
|
166 |
|
|
/* Ignore the SIGHUP we get when our parent shell dies. */ |
167 |
|
|
(void)signal(SIGHUP, SIG_IGN); |
168 |
|
|
|
169 |
|
|
/* |
170 |
|
|
* If we're running in a pipeline, we don't want to die |
171 |
|
|
* after killing whatever we're writing to. |
172 |
|
|
*/ |
173 |
|
|
(void)signal(SIGPIPE, SIG_IGN); |
174 |
|
|
|
175 |
|
|
if (access(_PATH_RC, R_OK) != -1) { |
176 |
|
|
pid_t pid; |
177 |
|
|
struct termios t; |
178 |
|
|
int fd, status; |
179 |
|
|
|
180 |
|
|
switch ((pid = fork())) { |
181 |
|
|
case -1: |
182 |
|
|
break; |
183 |
|
|
case 0: |
184 |
|
|
if (revoke(_PATH_CONSOLE) == -1) |
185 |
|
|
warn("revoke"); |
186 |
|
|
if (setsid() == -1) |
187 |
|
|
warn("setsid"); |
188 |
|
|
fd = open(_PATH_CONSOLE, O_RDWR); |
189 |
|
|
if (fd == -1) |
190 |
|
|
warn("open"); |
191 |
|
|
dup2(fd, 0); |
192 |
|
|
dup2(fd, 1); |
193 |
|
|
dup2(fd, 2); |
194 |
|
|
if (fd > 2) |
195 |
|
|
close(fd); |
196 |
|
|
|
197 |
|
|
/* At a minimum... */ |
198 |
|
|
tcgetattr(0, &t); |
199 |
|
|
t.c_oflag |= (ONLCR | OPOST); |
200 |
|
|
tcsetattr(0, TCSANOW, &t); |
201 |
|
|
|
202 |
|
|
execl(_PATH_BSHELL, "sh", _PATH_RC, "shutdown", (char *)NULL); |
203 |
|
|
_exit(1); |
204 |
|
|
default: |
205 |
|
|
/* rc exits 2 if powerdown=YES in rc.shutdown */ |
206 |
|
|
waitpid(pid, &status, 0); |
207 |
|
|
if (dohalt && WIFEXITED(status) && WEXITSTATUS(status) == 2) |
208 |
|
|
howto |= RB_POWERDOWN; |
209 |
|
|
} |
210 |
|
|
} |
211 |
|
|
|
212 |
|
|
/* |
213 |
|
|
* Point of no return, block all signals so we are sure to |
214 |
|
|
* reach the call to reboot(2) unmolested. |
215 |
|
|
*/ |
216 |
|
|
sigfillset(&mask); |
217 |
|
|
sigprocmask(SIG_BLOCK, &mask, NULL); |
218 |
|
|
|
219 |
|
|
/* Send a SIGTERM first, a chance to save the buffers. */ |
220 |
|
|
if (kill(-1, SIGTERM) == -1) { |
221 |
|
|
/* |
222 |
|
|
* If ESRCH, everything's OK: we're the only non-system |
223 |
|
|
* process! That can happen e.g. via 'exec reboot' in |
224 |
|
|
* single-user mode. |
225 |
|
|
*/ |
226 |
|
|
if (errno != ESRCH) { |
227 |
|
|
warn("SIGTERM processes"); |
228 |
|
|
goto restart; |
229 |
|
|
} |
230 |
|
|
} |
231 |
|
|
|
232 |
|
|
/* |
233 |
|
|
* After the processes receive the signal, start the rest of the |
234 |
|
|
* buffers on their way. Wait 5 seconds between the SIGTERM and |
235 |
|
|
* the SIGKILL to give everybody a chance. |
236 |
|
|
*/ |
237 |
|
|
sleep(2); |
238 |
|
|
if (!nflag) |
239 |
|
|
sync(); |
240 |
|
|
sleep(3); |
241 |
|
|
|
242 |
|
|
for (i = 1;; ++i) { |
243 |
|
|
if (kill(-1, SIGKILL) == -1) { |
244 |
|
|
if (errno == ESRCH) |
245 |
|
|
break; |
246 |
|
|
goto restart; |
247 |
|
|
} |
248 |
|
|
if (i > 5) { |
249 |
|
|
warnx("WARNING: some process(es) wouldn't die"); |
250 |
|
|
break; |
251 |
|
|
} |
252 |
|
|
(void)sleep(2 * i); |
253 |
|
|
} |
254 |
|
|
|
255 |
|
|
reboot(howto); |
256 |
|
|
/* FALLTHROUGH */ |
257 |
|
|
|
258 |
|
|
restart: |
259 |
|
|
errx(1, kill(1, SIGHUP) == -1 ? "(can't restart init): " : ""); |
260 |
|
|
/* NOTREACHED */ |
261 |
|
|
} |
262 |
|
|
|
263 |
|
|
void |
264 |
|
|
usage(void) |
265 |
|
|
{ |
266 |
|
|
fprintf(stderr, "usage: %s [-dn%sq]\n", __progname, |
267 |
|
|
dohalt ? "p" : ""); |
268 |
|
|
exit(1); |
269 |
|
|
} |