is not valid - it says that "sh" is the default, but you can't actually type "sh" at this prompt - it has to be /bin/sh or some other full pathname.
1625 lines
34 KiB
C
1625 lines
34 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Donn Seeley at Berkeley Software Design, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $Id: init.c,v 1.27 1997/08/18 01:40:12 davidn Exp $
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char copyright[] =
|
|
"@(#) Copyright (c) 1991, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)init.c 8.1 (Berkeley) 7/15/93";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <db.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <libutil.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <syslog.h>
|
|
#include <time.h>
|
|
#include <ttyent.h>
|
|
#include <unistd.h>
|
|
#include <sys/reboot.h>
|
|
#include <err.h>
|
|
|
|
#ifdef __STDC__
|
|
#include <stdarg.h>
|
|
#else
|
|
#include <varargs.h>
|
|
#endif
|
|
|
|
#ifdef SECURE
|
|
#include <pwd.h>
|
|
#endif
|
|
|
|
#ifdef LOGIN_CAP
|
|
#include <login_cap.h>
|
|
#endif
|
|
|
|
#include "pathnames.h"
|
|
|
|
/*
|
|
* Sleep times; used to prevent thrashing.
|
|
*/
|
|
#define GETTY_SPACING 5 /* N secs minimum getty spacing */
|
|
#define GETTY_SLEEP 30 /* sleep N secs after spacing problem */
|
|
#define GETTY_NSPACE 3 /* max. spacing count to bring reaction */
|
|
#define WINDOW_WAIT 3 /* wait N secs after starting window */
|
|
#define STALL_TIMEOUT 30 /* wait N secs after warning */
|
|
#define DEATH_WATCH 10 /* wait N secs for procs to die */
|
|
#define DEATH_SCRIPT 120 /* wait for 2mn for /etc/rc.shutdown */
|
|
#define RESOURCE_RC "daemon"
|
|
#define RESOURCE_WINDOW "default"
|
|
#define RESOURCE_GETTY "default"
|
|
|
|
void handle __P((sig_t, ...));
|
|
void delset __P((sigset_t *, ...));
|
|
|
|
void stall __P((char *, ...));
|
|
void warning __P((char *, ...));
|
|
void emergency __P((char *, ...));
|
|
void disaster __P((int));
|
|
void badsys __P((int));
|
|
int runshutdown __P((void));
|
|
|
|
/*
|
|
* We really need a recursive typedef...
|
|
* The following at least guarantees that the return type of (*state_t)()
|
|
* is sufficiently wide to hold a function pointer.
|
|
*/
|
|
typedef long (*state_func_t) __P((void));
|
|
typedef state_func_t (*state_t) __P((void));
|
|
|
|
state_func_t single_user __P((void));
|
|
state_func_t runcom __P((void));
|
|
state_func_t read_ttys __P((void));
|
|
state_func_t multi_user __P((void));
|
|
state_func_t clean_ttys __P((void));
|
|
state_func_t catatonia __P((void));
|
|
state_func_t death __P((void));
|
|
|
|
enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT;
|
|
#define FALSE 0
|
|
#define TRUE 1
|
|
|
|
int Reboot = FALSE;
|
|
|
|
int devfs;
|
|
|
|
void transition __P((state_t));
|
|
state_t requested_transition = runcom;
|
|
|
|
void setctty __P((char *));
|
|
|
|
typedef struct init_session {
|
|
int se_index; /* index of entry in ttys file */
|
|
pid_t se_process; /* controlling process */
|
|
time_t se_started; /* used to avoid thrashing */
|
|
int se_flags; /* status of session */
|
|
#define SE_SHUTDOWN 0x1 /* session won't be restarted */
|
|
int se_nspace; /* spacing count */
|
|
char *se_device; /* filename of port */
|
|
char *se_getty; /* what to run on that port */
|
|
char *se_getty_argv_space; /* pre-parsed argument array space */
|
|
char **se_getty_argv; /* pre-parsed argument array */
|
|
char *se_window; /* window system (started only once) */
|
|
char *se_window_argv_space; /* pre-parsed argument array space */
|
|
char **se_window_argv; /* pre-parsed argument array */
|
|
char *se_type; /* default terminal type */
|
|
struct init_session *se_prev;
|
|
struct init_session *se_next;
|
|
} session_t;
|
|
|
|
void free_session __P((session_t *));
|
|
session_t *new_session __P((session_t *, int, struct ttyent *));
|
|
session_t *sessions;
|
|
|
|
char **construct_argv __P((char *));
|
|
void start_window_system __P((session_t *));
|
|
void collect_child __P((pid_t));
|
|
pid_t start_getty __P((session_t *));
|
|
void transition_handler __P((int));
|
|
void alrm_handler __P((int));
|
|
void setsecuritylevel __P((int));
|
|
int getsecuritylevel __P((void));
|
|
int setupargv __P((session_t *, struct ttyent *));
|
|
#ifdef LOGIN_CAP
|
|
void setprocresources __P((const char *));
|
|
#endif
|
|
int clang;
|
|
|
|
void clear_session_logs __P((session_t *));
|
|
|
|
int start_session_db __P((void));
|
|
void add_session __P((session_t *));
|
|
void del_session __P((session_t *));
|
|
session_t *find_session __P((pid_t));
|
|
DB *session_db;
|
|
|
|
/*
|
|
* The mother of all processes.
|
|
*/
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
int c;
|
|
struct sigaction sa;
|
|
sigset_t mask;
|
|
|
|
|
|
/* Dispose of random users. */
|
|
if (getuid() != 0)
|
|
errx(1, "%s", strerror(EPERM));
|
|
|
|
/* System V users like to reexec init. */
|
|
if (getpid() != 1)
|
|
errx(1, "already running");
|
|
|
|
/*
|
|
* Note that this does NOT open a file...
|
|
* Does 'init' deserve its own facility number?
|
|
*/
|
|
openlog("init", LOG_CONS|LOG_ODELAY, LOG_AUTH);
|
|
|
|
/*
|
|
* Create an initial session.
|
|
*/
|
|
if (setsid() < 0)
|
|
warning("initial setsid() failed: %m");
|
|
|
|
/*
|
|
* Establish an initial user so that programs running
|
|
* single user do not freak out and die (like passwd).
|
|
*/
|
|
if (setlogin("root") < 0)
|
|
warning("setlogin() failed: %m");
|
|
|
|
/*
|
|
* This code assumes that we always get arguments through flags,
|
|
* never through bits set in some random machine register.
|
|
*/
|
|
while ((c = getopt(argc, argv, "dsf")) != -1)
|
|
switch (c) {
|
|
case 'd':
|
|
devfs = 1;
|
|
break;
|
|
case 's':
|
|
requested_transition = single_user;
|
|
break;
|
|
case 'f':
|
|
runcom_mode = FASTBOOT;
|
|
break;
|
|
default:
|
|
warning("unrecognized flag '-%c'", c);
|
|
break;
|
|
}
|
|
|
|
if (optind != argc)
|
|
warning("ignoring excess arguments");
|
|
|
|
if (devfs) {
|
|
mount("devfs", "/dev", MNT_NOEXEC|MNT_RDONLY, 0);
|
|
}
|
|
|
|
/*
|
|
* We catch or block signals rather than ignore them,
|
|
* so that they get reset on exec.
|
|
*/
|
|
handle(badsys, SIGSYS, 0);
|
|
handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV,
|
|
SIGBUS, SIGXCPU, SIGXFSZ, 0);
|
|
handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 0);
|
|
handle(alrm_handler, SIGALRM, 0);
|
|
sigfillset(&mask);
|
|
delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS,
|
|
SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 0);
|
|
sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0);
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_flags = 0;
|
|
sa.sa_handler = SIG_IGN;
|
|
(void) sigaction(SIGTTIN, &sa, (struct sigaction *)0);
|
|
(void) sigaction(SIGTTOU, &sa, (struct sigaction *)0);
|
|
|
|
/*
|
|
* Paranoia.
|
|
*/
|
|
close(0);
|
|
close(1);
|
|
close(2);
|
|
|
|
/*
|
|
* Start the state machine.
|
|
*/
|
|
transition(requested_transition);
|
|
|
|
/*
|
|
* Should never reach here.
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Associate a function with a signal handler.
|
|
*/
|
|
void
|
|
#ifdef __STDC__
|
|
handle(sig_t handler, ...)
|
|
#else
|
|
handle(va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
int sig;
|
|
struct sigaction sa;
|
|
int mask_everything;
|
|
va_list ap;
|
|
#ifndef __STDC__
|
|
sig_t handler;
|
|
|
|
va_start(ap);
|
|
handler = va_arg(ap, sig_t);
|
|
#else
|
|
va_start(ap, handler);
|
|
#endif
|
|
|
|
sa.sa_handler = handler;
|
|
sigfillset(&mask_everything);
|
|
|
|
while ((sig = va_arg(ap, int)) != NULL) {
|
|
sa.sa_mask = mask_everything;
|
|
/* XXX SA_RESTART? */
|
|
sa.sa_flags = sig == SIGCHLD ? SA_NOCLDSTOP : 0;
|
|
sigaction(sig, &sa, (struct sigaction *) 0);
|
|
}
|
|
va_end(ap);
|
|
}
|
|
|
|
/*
|
|
* Delete a set of signals from a mask.
|
|
*/
|
|
void
|
|
#ifdef __STDC__
|
|
delset(sigset_t *maskp, ...)
|
|
#else
|
|
delset(va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
int sig;
|
|
va_list ap;
|
|
#ifndef __STDC__
|
|
sigset_t *maskp;
|
|
|
|
va_start(ap);
|
|
maskp = va_arg(ap, sigset_t *);
|
|
#else
|
|
va_start(ap, maskp);
|
|
#endif
|
|
|
|
while ((sig = va_arg(ap, int)) != NULL)
|
|
sigdelset(maskp, sig);
|
|
va_end(ap);
|
|
}
|
|
|
|
/*
|
|
* Log a message and sleep for a while (to give someone an opportunity
|
|
* to read it and to save log or hardcopy output if the problem is chronic).
|
|
* NB: should send a message to the session logger to avoid blocking.
|
|
*/
|
|
void
|
|
#ifdef __STDC__
|
|
stall(char *message, ...)
|
|
#else
|
|
stall(va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list ap;
|
|
#ifndef __STDC__
|
|
char *message;
|
|
|
|
va_start(ap);
|
|
message = va_arg(ap, char *);
|
|
#else
|
|
va_start(ap, message);
|
|
#endif
|
|
|
|
vsyslog(LOG_ALERT, message, ap);
|
|
va_end(ap);
|
|
sleep(STALL_TIMEOUT);
|
|
}
|
|
|
|
/*
|
|
* Like stall(), but doesn't sleep.
|
|
* If cpp had variadic macros, the two functions could be #defines for another.
|
|
* NB: should send a message to the session logger to avoid blocking.
|
|
*/
|
|
void
|
|
#ifdef __STDC__
|
|
warning(char *message, ...)
|
|
#else
|
|
warning(va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list ap;
|
|
#ifndef __STDC__
|
|
char *message;
|
|
|
|
va_start(ap);
|
|
message = va_arg(ap, char *);
|
|
#else
|
|
va_start(ap, message);
|
|
#endif
|
|
|
|
vsyslog(LOG_ALERT, message, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
/*
|
|
* Log an emergency message.
|
|
* NB: should send a message to the session logger to avoid blocking.
|
|
*/
|
|
void
|
|
#ifdef __STDC__
|
|
emergency(char *message, ...)
|
|
#else
|
|
emergency(va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list ap;
|
|
#ifndef __STDC__
|
|
char *message;
|
|
|
|
va_start(ap);
|
|
message = va_arg(ap, char *);
|
|
#else
|
|
va_start(ap, message);
|
|
#endif
|
|
|
|
vsyslog(LOG_EMERG, message, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
/*
|
|
* Catch a SIGSYS signal.
|
|
*
|
|
* These may arise if a system does not support sysctl.
|
|
* We tolerate up to 25 of these, then throw in the towel.
|
|
*/
|
|
void
|
|
badsys(sig)
|
|
int sig;
|
|
{
|
|
static int badcount = 0;
|
|
|
|
if (badcount++ < 25)
|
|
return;
|
|
disaster(sig);
|
|
}
|
|
|
|
/*
|
|
* Catch an unexpected signal.
|
|
*/
|
|
void
|
|
disaster(sig)
|
|
int sig;
|
|
{
|
|
emergency("fatal signal: %s",
|
|
(unsigned)sig < NSIG ? sys_siglist[sig] : "unknown signal");
|
|
|
|
sleep(STALL_TIMEOUT);
|
|
_exit(sig); /* reboot */
|
|
}
|
|
|
|
/*
|
|
* Get the security level of the kernel.
|
|
*/
|
|
int
|
|
getsecuritylevel()
|
|
{
|
|
#ifdef KERN_SECURELVL
|
|
int name[2], curlevel;
|
|
size_t len;
|
|
extern int errno;
|
|
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_SECURELVL;
|
|
len = sizeof curlevel;
|
|
if (sysctl(name, 2, &curlevel, &len, NULL, 0) == -1) {
|
|
emergency("cannot get kernel security level: %s",
|
|
strerror(errno));
|
|
return (-1);
|
|
}
|
|
return (curlevel);
|
|
#else
|
|
return (-1);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Set the security level of the kernel.
|
|
*/
|
|
void
|
|
setsecuritylevel(newlevel)
|
|
int newlevel;
|
|
{
|
|
#ifdef KERN_SECURELVL
|
|
int name[2], curlevel;
|
|
extern int errno;
|
|
|
|
curlevel = getsecuritylevel();
|
|
if (newlevel == curlevel)
|
|
return;
|
|
name[0] = CTL_KERN;
|
|
name[1] = KERN_SECURELVL;
|
|
if (sysctl(name, 2, NULL, NULL, &newlevel, sizeof newlevel) == -1) {
|
|
emergency(
|
|
"cannot change kernel security level from %d to %d: %s",
|
|
curlevel, newlevel, strerror(errno));
|
|
return;
|
|
}
|
|
#ifdef SECURE
|
|
warning("kernel security level changed from %d to %d",
|
|
curlevel, newlevel);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Change states in the finite state machine.
|
|
* The initial state is passed as an argument.
|
|
*/
|
|
void
|
|
transition(s)
|
|
state_t s;
|
|
{
|
|
for (;;)
|
|
s = (state_t) (*s)();
|
|
}
|
|
|
|
/*
|
|
* Close out the accounting files for a login session.
|
|
* NB: should send a message to the session logger to avoid blocking.
|
|
*/
|
|
void
|
|
clear_session_logs(sp)
|
|
session_t *sp;
|
|
{
|
|
char *line = sp->se_device + sizeof(_PATH_DEV) - 1;
|
|
|
|
if (logout(line))
|
|
logwtmp(line, "", "");
|
|
}
|
|
|
|
/*
|
|
* Start a session and allocate a controlling terminal.
|
|
* Only called by children of init after forking.
|
|
*/
|
|
void
|
|
setctty(name)
|
|
char *name;
|
|
{
|
|
int fd;
|
|
|
|
(void) revoke(name);
|
|
if ((fd = open(name, O_RDWR)) == -1) {
|
|
stall("can't open %s: %m", name);
|
|
_exit(1);
|
|
}
|
|
if (login_tty(fd) == -1) {
|
|
stall("can't get %s for controlling terminal: %m", name);
|
|
_exit(1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Bring the system up single user.
|
|
*/
|
|
state_func_t
|
|
single_user()
|
|
{
|
|
pid_t pid, wpid;
|
|
int status;
|
|
sigset_t mask;
|
|
char *shell = _PATH_BSHELL;
|
|
char *argv[2];
|
|
#ifdef SECURE
|
|
struct ttyent *typ;
|
|
struct passwd *pp;
|
|
static const char banner[] =
|
|
"Enter root password, or ^D to go multi-user\n";
|
|
char *clear, *password;
|
|
#endif
|
|
|
|
/*
|
|
* If the kernel is in secure mode, downgrade it to insecure mode.
|
|
*/
|
|
if (getsecuritylevel() > 0)
|
|
setsecuritylevel(0);
|
|
|
|
if (Reboot) {
|
|
/* Instead of going single user, let's halt the machine */
|
|
sync();
|
|
alarm(2);
|
|
pause();
|
|
reboot(RB_AUTOBOOT);
|
|
_exit(0);
|
|
}
|
|
|
|
if ((pid = fork()) == 0) {
|
|
/*
|
|
* Start the single user session.
|
|
*/
|
|
setctty(_PATH_CONSOLE);
|
|
|
|
#ifdef SECURE
|
|
/*
|
|
* Check the root password.
|
|
* We don't care if the console is 'on' by default;
|
|
* it's the only tty that can be 'off' and 'secure'.
|
|
*/
|
|
typ = getttynam("console");
|
|
pp = getpwnam("root");
|
|
if (typ && (typ->ty_status & TTY_SECURE) == 0 && pp && *pp->pw_passwd) {
|
|
write(2, banner, sizeof banner - 1);
|
|
for (;;) {
|
|
clear = getpass("Password:");
|
|
if (clear == 0 || *clear == '\0')
|
|
_exit(0);
|
|
password = crypt(clear, pp->pw_passwd);
|
|
bzero(clear, _PASSWORD_LEN);
|
|
if (strcmp(password, pp->pw_passwd) == 0)
|
|
break;
|
|
warning("single-user login failed\n");
|
|
}
|
|
}
|
|
endttyent();
|
|
endpwent();
|
|
#endif /* SECURE */
|
|
|
|
#ifdef DEBUGSHELL
|
|
{
|
|
char altshell[128], *cp = altshell;
|
|
int num;
|
|
|
|
#define SHREQUEST \
|
|
"Enter full pathname of shell or RETURN for " _PATH_BSHELL ": "
|
|
(void)write(STDERR_FILENO,
|
|
SHREQUEST, sizeof(SHREQUEST) - 1);
|
|
while ((num = read(STDIN_FILENO, cp, 1)) != -1 &&
|
|
num != 0 && *cp != '\n' && cp < &altshell[127])
|
|
cp++;
|
|
*cp = '\0';
|
|
if (altshell[0] != '\0')
|
|
shell = altshell;
|
|
}
|
|
#endif /* DEBUGSHELL */
|
|
|
|
/*
|
|
* Unblock signals.
|
|
* We catch all the interesting ones,
|
|
* and those are reset to SIG_DFL on exec.
|
|
*/
|
|
sigemptyset(&mask);
|
|
sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0);
|
|
|
|
/*
|
|
* Fire off a shell.
|
|
* If the default one doesn't work, try the Bourne shell.
|
|
*/
|
|
argv[0] = "-sh";
|
|
argv[1] = 0;
|
|
execv(shell, argv);
|
|
emergency("can't exec %s for single user: %m", shell);
|
|
execv(_PATH_BSHELL, argv);
|
|
emergency("can't exec %s for single user: %m", _PATH_BSHELL);
|
|
sleep(STALL_TIMEOUT);
|
|
_exit(1);
|
|
}
|
|
|
|
if (pid == -1) {
|
|
/*
|
|
* We are seriously hosed. Do our best.
|
|
*/
|
|
emergency("can't fork single-user shell, trying again");
|
|
while (waitpid(-1, (int *) 0, WNOHANG) > 0)
|
|
continue;
|
|
return (state_func_t) single_user;
|
|
}
|
|
|
|
requested_transition = 0;
|
|
do {
|
|
if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1)
|
|
collect_child(wpid);
|
|
if (wpid == -1) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
warning("wait for single-user shell failed: %m; restarting");
|
|
return (state_func_t) single_user;
|
|
}
|
|
if (wpid == pid && WIFSTOPPED(status)) {
|
|
warning("init: shell stopped, restarting\n");
|
|
kill(pid, SIGCONT);
|
|
wpid = -1;
|
|
}
|
|
} while (wpid != pid && !requested_transition);
|
|
|
|
if (requested_transition)
|
|
return (state_func_t) requested_transition;
|
|
|
|
if (!WIFEXITED(status)) {
|
|
if (WTERMSIG(status) == SIGKILL) {
|
|
/*
|
|
* reboot(8) killed shell?
|
|
*/
|
|
warning("single user shell terminated.");
|
|
sleep(STALL_TIMEOUT);
|
|
_exit(0);
|
|
} else {
|
|
warning("single user shell terminated, restarting");
|
|
return (state_func_t) single_user;
|
|
}
|
|
}
|
|
|
|
runcom_mode = FASTBOOT;
|
|
return (state_func_t) runcom;
|
|
}
|
|
|
|
/*
|
|
* Run the system startup script.
|
|
*/
|
|
state_func_t
|
|
runcom()
|
|
{
|
|
pid_t pid, wpid;
|
|
int status;
|
|
char *argv[4];
|
|
struct sigaction sa;
|
|
|
|
if ((pid = fork()) == 0) {
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_flags = 0;
|
|
sa.sa_handler = SIG_IGN;
|
|
(void) sigaction(SIGTSTP, &sa, (struct sigaction *)0);
|
|
(void) sigaction(SIGHUP, &sa, (struct sigaction *)0);
|
|
|
|
setctty(_PATH_CONSOLE);
|
|
|
|
argv[0] = "sh";
|
|
argv[1] = _PATH_RUNCOM;
|
|
argv[2] = runcom_mode == AUTOBOOT ? "autoboot" : 0;
|
|
argv[3] = 0;
|
|
|
|
sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0);
|
|
|
|
#ifdef LOGIN_CAP
|
|
setprocresources(RESOURCE_RC);
|
|
#endif
|
|
execv(_PATH_BSHELL, argv);
|
|
stall("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNCOM);
|
|
_exit(1); /* force single user mode */
|
|
}
|
|
|
|
if (pid == -1) {
|
|
emergency("can't fork for %s on %s: %m",
|
|
_PATH_BSHELL, _PATH_RUNCOM);
|
|
while (waitpid(-1, (int *) 0, WNOHANG) > 0)
|
|
continue;
|
|
sleep(STALL_TIMEOUT);
|
|
return (state_func_t) single_user;
|
|
}
|
|
|
|
/*
|
|
* Copied from single_user(). This is a bit paranoid.
|
|
*/
|
|
do {
|
|
if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1)
|
|
collect_child(wpid);
|
|
if (wpid == -1) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
warning("wait for %s on %s failed: %m; going to single user mode",
|
|
_PATH_BSHELL, _PATH_RUNCOM);
|
|
return (state_func_t) single_user;
|
|
}
|
|
if (wpid == pid && WIFSTOPPED(status)) {
|
|
warning("init: %s on %s stopped, restarting\n",
|
|
_PATH_BSHELL, _PATH_RUNCOM);
|
|
kill(pid, SIGCONT);
|
|
wpid = -1;
|
|
}
|
|
} while (wpid != pid);
|
|
|
|
if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM &&
|
|
requested_transition == catatonia) {
|
|
/* /etc/rc executed /sbin/reboot; wait for the end quietly */
|
|
sigset_t s;
|
|
|
|
sigfillset(&s);
|
|
for (;;)
|
|
sigsuspend(&s);
|
|
}
|
|
|
|
if (!WIFEXITED(status)) {
|
|
warning("%s on %s terminated abnormally, going to single user mode",
|
|
_PATH_BSHELL, _PATH_RUNCOM);
|
|
return (state_func_t) single_user;
|
|
}
|
|
|
|
if (WEXITSTATUS(status))
|
|
return (state_func_t) single_user;
|
|
|
|
runcom_mode = AUTOBOOT; /* the default */
|
|
/* NB: should send a message to the session logger to avoid blocking. */
|
|
logwtmp("~", "reboot", "");
|
|
return (state_func_t) read_ttys;
|
|
}
|
|
|
|
/*
|
|
* Open the session database.
|
|
*
|
|
* NB: We could pass in the size here; is it necessary?
|
|
*/
|
|
int
|
|
start_session_db()
|
|
{
|
|
if (session_db && (*session_db->close)(session_db))
|
|
emergency("session database close: %s", strerror(errno));
|
|
if ((session_db = dbopen(NULL, O_RDWR, 0, DB_HASH, NULL)) == 0) {
|
|
emergency("session database open: %s", strerror(errno));
|
|
return (1);
|
|
}
|
|
return (0);
|
|
|
|
}
|
|
|
|
/*
|
|
* Add a new login session.
|
|
*/
|
|
void
|
|
add_session(sp)
|
|
session_t *sp;
|
|
{
|
|
DBT key;
|
|
DBT data;
|
|
|
|
key.data = &sp->se_process;
|
|
key.size = sizeof sp->se_process;
|
|
data.data = &sp;
|
|
data.size = sizeof sp;
|
|
|
|
if ((*session_db->put)(session_db, &key, &data, 0))
|
|
emergency("insert %d: %s", sp->se_process, strerror(errno));
|
|
}
|
|
|
|
/*
|
|
* Delete an old login session.
|
|
*/
|
|
void
|
|
del_session(sp)
|
|
session_t *sp;
|
|
{
|
|
DBT key;
|
|
|
|
key.data = &sp->se_process;
|
|
key.size = sizeof sp->se_process;
|
|
|
|
if ((*session_db->del)(session_db, &key, 0))
|
|
emergency("delete %d: %s", sp->se_process, strerror(errno));
|
|
}
|
|
|
|
/*
|
|
* Look up a login session by pid.
|
|
*/
|
|
session_t *
|
|
#ifdef __STDC__
|
|
find_session(pid_t pid)
|
|
#else
|
|
find_session(pid)
|
|
pid_t pid;
|
|
#endif
|
|
{
|
|
DBT key;
|
|
DBT data;
|
|
session_t *ret;
|
|
|
|
key.data = &pid;
|
|
key.size = sizeof pid;
|
|
if ((*session_db->get)(session_db, &key, &data, 0) != 0)
|
|
return 0;
|
|
bcopy(data.data, (char *)&ret, sizeof(ret));
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Construct an argument vector from a command line.
|
|
*/
|
|
char **
|
|
construct_argv(command)
|
|
char *command;
|
|
{
|
|
char *strk (char *);
|
|
register int argc = 0;
|
|
register char **argv = (char **) malloc(((strlen(command) + 1) / 2 + 1)
|
|
* sizeof (char *));
|
|
|
|
if ((argv[argc++] = strk(command)) == 0)
|
|
return 0;
|
|
while ((argv[argc++] = strk((char *) 0)) != NULL)
|
|
continue;
|
|
return argv;
|
|
}
|
|
|
|
/*
|
|
* Deallocate a session descriptor.
|
|
*/
|
|
void
|
|
free_session(sp)
|
|
register session_t *sp;
|
|
{
|
|
free(sp->se_device);
|
|
if (sp->se_getty) {
|
|
free(sp->se_getty);
|
|
free(sp->se_getty_argv_space);
|
|
free(sp->se_getty_argv);
|
|
}
|
|
if (sp->se_window) {
|
|
free(sp->se_window);
|
|
free(sp->se_window_argv_space);
|
|
free(sp->se_window_argv);
|
|
}
|
|
if (sp->se_type)
|
|
free(sp->se_type);
|
|
free(sp);
|
|
}
|
|
|
|
/*
|
|
* Allocate a new session descriptor.
|
|
*/
|
|
session_t *
|
|
new_session(sprev, session_index, typ)
|
|
session_t *sprev;
|
|
int session_index;
|
|
register struct ttyent *typ;
|
|
{
|
|
register session_t *sp;
|
|
int fd;
|
|
|
|
if ((typ->ty_status & TTY_ON) == 0 ||
|
|
typ->ty_name == 0 ||
|
|
typ->ty_getty == 0)
|
|
return 0;
|
|
|
|
sp = (session_t *) calloc(1, sizeof (session_t));
|
|
|
|
sp->se_index = session_index;
|
|
|
|
sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name));
|
|
(void) sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name);
|
|
|
|
/*
|
|
* Attempt to open the device, if we get "device not configured"
|
|
* then don't add the device to the session list.
|
|
*/
|
|
if ((fd = open(sp->se_device, O_RDONLY | O_NONBLOCK, 0)) < 0) {
|
|
if (errno == ENXIO) {
|
|
free_session(sp);
|
|
return (0);
|
|
}
|
|
} else
|
|
close(fd);
|
|
|
|
if (setupargv(sp, typ) == 0) {
|
|
free_session(sp);
|
|
return (0);
|
|
}
|
|
|
|
sp->se_next = 0;
|
|
if (sprev == 0) {
|
|
sessions = sp;
|
|
sp->se_prev = 0;
|
|
} else {
|
|
sprev->se_next = sp;
|
|
sp->se_prev = sprev;
|
|
}
|
|
|
|
return sp;
|
|
}
|
|
|
|
/*
|
|
* Calculate getty and if useful window argv vectors.
|
|
*/
|
|
int
|
|
setupargv(sp, typ)
|
|
session_t *sp;
|
|
struct ttyent *typ;
|
|
{
|
|
|
|
if (sp->se_getty) {
|
|
free(sp->se_getty);
|
|
free(sp->se_getty_argv_space);
|
|
free(sp->se_getty_argv);
|
|
}
|
|
sp->se_getty = malloc(strlen(typ->ty_getty) + strlen(typ->ty_name) + 2);
|
|
(void) sprintf(sp->se_getty, "%s %s", typ->ty_getty, typ->ty_name);
|
|
sp->se_getty_argv_space = strdup(sp->se_getty);
|
|
sp->se_getty_argv = construct_argv(sp->se_getty_argv_space);
|
|
if (sp->se_getty_argv == 0) {
|
|
warning("can't parse getty for port %s", sp->se_device);
|
|
free(sp->se_getty);
|
|
free(sp->se_getty_argv_space);
|
|
sp->se_getty = sp->se_getty_argv_space = 0;
|
|
return (0);
|
|
}
|
|
if (sp->se_window) {
|
|
free(sp->se_window);
|
|
free(sp->se_window_argv_space);
|
|
free(sp->se_window_argv);
|
|
}
|
|
sp->se_window = sp->se_window_argv_space = 0;
|
|
sp->se_window_argv = 0;
|
|
if (typ->ty_window) {
|
|
sp->se_window = strdup(typ->ty_window);
|
|
sp->se_window_argv_space = strdup(sp->se_window);
|
|
sp->se_window_argv = construct_argv(sp->se_window_argv_space);
|
|
if (sp->se_window_argv == 0) {
|
|
warning("can't parse window for port %s",
|
|
sp->se_device);
|
|
free(sp->se_window_argv_space);
|
|
free(sp->se_window);
|
|
sp->se_window = sp->se_window_argv_space = 0;
|
|
return (0);
|
|
}
|
|
}
|
|
if (sp->se_type)
|
|
free(sp->se_type);
|
|
sp->se_type = typ->ty_type ? strdup(typ->ty_type) : 0;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Walk the list of ttys and create sessions for each active line.
|
|
*/
|
|
state_func_t
|
|
read_ttys()
|
|
{
|
|
int session_index = 0;
|
|
register session_t *sp, *snext;
|
|
register struct ttyent *typ;
|
|
|
|
/*
|
|
* Destroy any previous session state.
|
|
* There shouldn't be any, but just in case...
|
|
*/
|
|
for (sp = sessions; sp; sp = snext) {
|
|
if (sp->se_process)
|
|
clear_session_logs(sp);
|
|
snext = sp->se_next;
|
|
free_session(sp);
|
|
}
|
|
sessions = 0;
|
|
if (start_session_db())
|
|
return (state_func_t) single_user;
|
|
|
|
/*
|
|
* Allocate a session entry for each active port.
|
|
* Note that sp starts at 0.
|
|
*/
|
|
while ((typ = getttyent()) != NULL)
|
|
if ((snext = new_session(sp, ++session_index, typ)) != NULL)
|
|
sp = snext;
|
|
|
|
endttyent();
|
|
|
|
return (state_func_t) multi_user;
|
|
}
|
|
|
|
/*
|
|
* Start a window system running.
|
|
*/
|
|
void
|
|
start_window_system(sp)
|
|
session_t *sp;
|
|
{
|
|
pid_t pid;
|
|
sigset_t mask;
|
|
char term[64], *env[2];
|
|
|
|
if ((pid = fork()) == -1) {
|
|
emergency("can't fork for window system on port %s: %m",
|
|
sp->se_device);
|
|
/* hope that getty fails and we can try again */
|
|
return;
|
|
}
|
|
|
|
if (pid)
|
|
return;
|
|
|
|
sigemptyset(&mask);
|
|
sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0);
|
|
|
|
if (setsid() < 0)
|
|
emergency("setsid failed (window) %m");
|
|
|
|
#ifdef LOGIN_CAP
|
|
setprocresources(RESOURCE_WINDOW);
|
|
#endif
|
|
if (sp->se_type) {
|
|
/* Don't use malloc after fork */
|
|
strcpy(term, "TERM=");
|
|
strncat(term, sp->se_type, sizeof(term) - 6);
|
|
env[0] = term;
|
|
env[1] = 0;
|
|
}
|
|
else
|
|
env[0] = 0;
|
|
execve(sp->se_window_argv[0], sp->se_window_argv, env);
|
|
stall("can't exec window system '%s' for port %s: %m",
|
|
sp->se_window_argv[0], sp->se_device);
|
|
_exit(1);
|
|
}
|
|
|
|
/*
|
|
* Start a login session running.
|
|
*/
|
|
pid_t
|
|
start_getty(sp)
|
|
session_t *sp;
|
|
{
|
|
pid_t pid;
|
|
sigset_t mask;
|
|
time_t current_time = time((time_t *) 0);
|
|
int too_quick = 0;
|
|
char term[64], *env[2];
|
|
|
|
if (current_time >= sp->se_started &&
|
|
current_time - sp->se_started < GETTY_SPACING) {
|
|
if (++sp->se_nspace > GETTY_NSPACE) {
|
|
sp->se_nspace = 0;
|
|
too_quick = 1;
|
|
}
|
|
} else
|
|
sp->se_nspace = 0;
|
|
|
|
/*
|
|
* fork(), not vfork() -- we can't afford to block.
|
|
*/
|
|
if ((pid = fork()) == -1) {
|
|
emergency("can't fork for getty on port %s: %m", sp->se_device);
|
|
return -1;
|
|
}
|
|
|
|
if (pid)
|
|
return pid;
|
|
|
|
if (too_quick) {
|
|
warning("getty repeating too quickly on port %s, sleeping %d secs",
|
|
sp->se_device, GETTY_SLEEP);
|
|
sleep((unsigned) GETTY_SLEEP);
|
|
}
|
|
|
|
if (sp->se_window) {
|
|
start_window_system(sp);
|
|
sleep(WINDOW_WAIT);
|
|
}
|
|
|
|
sigemptyset(&mask);
|
|
sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0);
|
|
|
|
#ifdef LOGIN_CAP
|
|
setprocresources(RESOURCE_GETTY);
|
|
#endif
|
|
if (sp->se_type) {
|
|
/* Don't use malloc after fork */
|
|
strcpy(term, "TERM=");
|
|
strncat(term, sp->se_type, sizeof(term) - 6);
|
|
env[0] = term;
|
|
env[1] = 0;
|
|
}
|
|
else
|
|
env[0] = 0;
|
|
execve(sp->se_getty_argv[0], sp->se_getty_argv, env);
|
|
stall("can't exec getty '%s' for port %s: %m",
|
|
sp->se_getty_argv[0], sp->se_device);
|
|
_exit(1);
|
|
}
|
|
|
|
/*
|
|
* Collect exit status for a child.
|
|
* If an exiting login, start a new login running.
|
|
*/
|
|
void
|
|
#ifdef __STDC__
|
|
collect_child(pid_t pid)
|
|
#else
|
|
collect_child(pid)
|
|
pid_t pid;
|
|
#endif
|
|
{
|
|
register session_t *sp, *sprev, *snext;
|
|
|
|
if (! sessions)
|
|
return;
|
|
|
|
if (! (sp = find_session(pid)))
|
|
return;
|
|
|
|
clear_session_logs(sp);
|
|
del_session(sp);
|
|
sp->se_process = 0;
|
|
|
|
if (sp->se_flags & SE_SHUTDOWN) {
|
|
if ((sprev = sp->se_prev) != NULL)
|
|
sprev->se_next = sp->se_next;
|
|
else
|
|
sessions = sp->se_next;
|
|
if ((snext = sp->se_next) != NULL)
|
|
snext->se_prev = sp->se_prev;
|
|
free_session(sp);
|
|
return;
|
|
}
|
|
|
|
if ((pid = start_getty(sp)) == -1) {
|
|
/* serious trouble */
|
|
requested_transition = clean_ttys;
|
|
return;
|
|
}
|
|
|
|
sp->se_process = pid;
|
|
sp->se_started = time((time_t *) 0);
|
|
add_session(sp);
|
|
}
|
|
|
|
/*
|
|
* Catch a signal and request a state transition.
|
|
*/
|
|
void
|
|
transition_handler(sig)
|
|
int sig;
|
|
{
|
|
|
|
switch (sig) {
|
|
case SIGHUP:
|
|
requested_transition = clean_ttys;
|
|
break;
|
|
case SIGINT:
|
|
Reboot = TRUE;
|
|
case SIGTERM:
|
|
requested_transition = death;
|
|
break;
|
|
case SIGTSTP:
|
|
requested_transition = catatonia;
|
|
break;
|
|
default:
|
|
requested_transition = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Take the system multiuser.
|
|
*/
|
|
state_func_t
|
|
multi_user()
|
|
{
|
|
pid_t pid;
|
|
register session_t *sp;
|
|
|
|
requested_transition = 0;
|
|
|
|
/*
|
|
* If the administrator has not set the security level to -1
|
|
* to indicate that the kernel should not run multiuser in secure
|
|
* mode, and the run script has not set a higher level of security
|
|
* than level 1, then put the kernel into secure mode.
|
|
*/
|
|
if (getsecuritylevel() == 0)
|
|
setsecuritylevel(1);
|
|
|
|
for (sp = sessions; sp; sp = sp->se_next) {
|
|
if (sp->se_process)
|
|
continue;
|
|
if ((pid = start_getty(sp)) == -1) {
|
|
/* serious trouble */
|
|
requested_transition = clean_ttys;
|
|
break;
|
|
}
|
|
sp->se_process = pid;
|
|
sp->se_started = time((time_t *) 0);
|
|
add_session(sp);
|
|
}
|
|
|
|
while (!requested_transition)
|
|
if ((pid = waitpid(-1, (int *) 0, 0)) != -1)
|
|
collect_child(pid);
|
|
|
|
return (state_func_t) requested_transition;
|
|
}
|
|
|
|
/*
|
|
* This is an n-squared algorithm. We hope it isn't run often...
|
|
*/
|
|
state_func_t
|
|
clean_ttys()
|
|
{
|
|
register session_t *sp, *sprev;
|
|
register struct ttyent *typ;
|
|
register int session_index = 0;
|
|
register int devlen;
|
|
char *old_getty, *old_window, *old_type;
|
|
|
|
if (! sessions)
|
|
return (state_func_t) multi_user;
|
|
|
|
devlen = sizeof(_PATH_DEV) - 1;
|
|
while ((typ = getttyent()) != NULL) {
|
|
++session_index;
|
|
|
|
for (sprev = 0, sp = sessions; sp; sprev = sp, sp = sp->se_next)
|
|
if (strcmp(typ->ty_name, sp->se_device + devlen) == 0)
|
|
break;
|
|
|
|
if (sp) {
|
|
if (sp->se_index != session_index) {
|
|
warning("port %s changed utmp index from %d to %d",
|
|
sp->se_device, sp->se_index,
|
|
session_index);
|
|
sp->se_index = session_index;
|
|
}
|
|
if ((typ->ty_status & TTY_ON) == 0 ||
|
|
typ->ty_getty == 0) {
|
|
sp->se_flags |= SE_SHUTDOWN;
|
|
kill(sp->se_process, SIGHUP);
|
|
continue;
|
|
}
|
|
sp->se_flags &= ~SE_SHUTDOWN;
|
|
old_getty = sp->se_getty ? strdup(sp->se_getty) : 0;
|
|
old_window = sp->se_window ? strdup(sp->se_window) : 0;
|
|
old_type = sp->se_type ? strdup(sp->se_type) : 0;
|
|
if (setupargv(sp, typ) == 0) {
|
|
warning("can't parse getty for port %s",
|
|
sp->se_device);
|
|
sp->se_flags |= SE_SHUTDOWN;
|
|
kill(sp->se_process, SIGHUP);
|
|
}
|
|
else if ( !old_getty
|
|
|| (!old_type && sp->se_type)
|
|
|| (old_type && !sp->se_type)
|
|
|| (!old_window && sp->se_window)
|
|
|| (old_window && !sp->se_window)
|
|
|| (strcmp(old_getty, sp->se_getty) != 0)
|
|
|| (old_window && strcmp(old_window, sp->se_window) != 0)
|
|
|| (old_type && strcmp(old_type, sp->se_type) != 0)
|
|
) {
|
|
/* Don't set SE_SHUTDOWN here */
|
|
sp->se_nspace = 0;
|
|
sp->se_started = 0;
|
|
kill(sp->se_process, SIGHUP);
|
|
}
|
|
if (old_getty)
|
|
free(old_getty);
|
|
if (old_getty)
|
|
free(old_window);
|
|
if (old_type)
|
|
free(old_type);
|
|
continue;
|
|
}
|
|
|
|
new_session(sprev, session_index, typ);
|
|
}
|
|
|
|
endttyent();
|
|
|
|
return (state_func_t) multi_user;
|
|
}
|
|
|
|
/*
|
|
* Block further logins.
|
|
*/
|
|
state_func_t
|
|
catatonia()
|
|
{
|
|
register session_t *sp;
|
|
|
|
for (sp = sessions; sp; sp = sp->se_next)
|
|
sp->se_flags |= SE_SHUTDOWN;
|
|
|
|
return (state_func_t) multi_user;
|
|
}
|
|
|
|
/*
|
|
* Note SIGALRM.
|
|
*/
|
|
void
|
|
alrm_handler(sig)
|
|
int sig;
|
|
{
|
|
(void)sig;
|
|
clang = 1;
|
|
}
|
|
|
|
/*
|
|
* Bring the system down to single user.
|
|
*/
|
|
state_func_t
|
|
death()
|
|
{
|
|
register session_t *sp;
|
|
register int i;
|
|
pid_t pid;
|
|
static const int death_sigs[2] = { SIGTERM, SIGKILL };
|
|
|
|
/* NB: should send a message to the session logger to avoid blocking. */
|
|
logwtmp("~", "shutdown", "");
|
|
|
|
for (sp = sessions; sp; sp = sp->se_next) {
|
|
sp->se_flags |= SE_SHUTDOWN;
|
|
kill(sp->se_process, SIGHUP);
|
|
}
|
|
|
|
/* Try to run the rc.shutdown script within a period of time */
|
|
(void) runshutdown();
|
|
|
|
for (i = 0; i < 2; ++i) {
|
|
if (kill(-1, death_sigs[i]) == -1 && errno == ESRCH)
|
|
return (state_func_t) single_user;
|
|
|
|
clang = 0;
|
|
alarm(DEATH_WATCH);
|
|
do
|
|
if ((pid = waitpid(-1, (int *)0, 0)) != -1)
|
|
collect_child(pid);
|
|
while (clang == 0 && errno != ECHILD);
|
|
|
|
if (errno == ECHILD)
|
|
return (state_func_t) single_user;
|
|
}
|
|
|
|
warning("some processes would not die; ps axl advised");
|
|
|
|
return (state_func_t) single_user;
|
|
}
|
|
|
|
/*
|
|
* Run the system shutdown script.
|
|
*
|
|
* Exit codes: XXX I should document more
|
|
* -2 shutdown script terminated abnormally
|
|
* -1 fatal error - can't run script
|
|
* 0 good.
|
|
* >0 some error (exit code)
|
|
*/
|
|
int
|
|
runshutdown()
|
|
{
|
|
pid_t pid, wpid;
|
|
int status;
|
|
int shutdowntimeout;
|
|
size_t len;
|
|
char *argv[3];
|
|
struct sigaction sa;
|
|
struct stat sb;
|
|
|
|
/*
|
|
* rc.shutdown is optional, so to prevent any unnecessary
|
|
* complaints from the shell we simply don't run it if the
|
|
* file does not exist. If the stat() here fails for other
|
|
* reasons, we'll let the shell complain.
|
|
*/
|
|
if (stat(_PATH_RUNDOWN, &sb) == -1 && errno == ENOENT)
|
|
return 0;
|
|
|
|
if ((pid = fork()) == 0) {
|
|
int fd;
|
|
|
|
/* Assume that init already grab console as ctty before */
|
|
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_flags = 0;
|
|
sa.sa_handler = SIG_IGN;
|
|
(void) sigaction(SIGTSTP, &sa, (struct sigaction *)0);
|
|
(void) sigaction(SIGHUP, &sa, (struct sigaction *)0);
|
|
|
|
if ((fd = open(_PATH_CONSOLE, O_RDWR)) == -1)
|
|
warning("can't open %s: %m", _PATH_CONSOLE);
|
|
else {
|
|
(void) dup2(fd, 0);
|
|
(void) dup2(fd, 1);
|
|
(void) dup2(fd, 2);
|
|
if (fd > 2)
|
|
close(fd);
|
|
}
|
|
|
|
/*
|
|
* Run the shutdown script.
|
|
*/
|
|
argv[0] = "sh";
|
|
argv[1] = _PATH_RUNDOWN;
|
|
argv[2] = 0;
|
|
|
|
sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0);
|
|
|
|
#ifdef LOGIN_CAP
|
|
setprocresources(RESOURCE_RC);
|
|
#endif
|
|
execv(_PATH_BSHELL, argv);
|
|
warning("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNDOWN);
|
|
_exit(1); /* force single user mode */
|
|
}
|
|
|
|
if (pid == -1) {
|
|
emergency("can't fork for %s on %s: %m",
|
|
_PATH_BSHELL, _PATH_RUNDOWN);
|
|
while (waitpid(-1, (int *) 0, WNOHANG) > 0)
|
|
continue;
|
|
sleep(STALL_TIMEOUT);
|
|
return -1;
|
|
}
|
|
|
|
len = sizeof(shutdowntimeout);
|
|
if (sysctlbyname("kern.shutdown_timeout",
|
|
&shutdowntimeout,
|
|
&len, NULL, 0) == -1 || shutdowntimeout < 2)
|
|
shutdowntimeout = DEATH_SCRIPT;
|
|
alarm(shutdowntimeout);
|
|
clang = 0;
|
|
/*
|
|
* Copied from single_user(). This is a bit paranoid.
|
|
* Use the same ALRM handler.
|
|
*/
|
|
do {
|
|
if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1)
|
|
collect_child(wpid);
|
|
if (clang == 1) {
|
|
/* we were waiting for the sub-shell */
|
|
kill(wpid, SIGTERM);
|
|
warning("timeout expired for %s on %s: %m; going to single used mode",
|
|
_PATH_BSHELL, _PATH_RUNDOWN);
|
|
return -1;
|
|
}
|
|
if (wpid == -1) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
warning("wait for %s on %s failed: %m; going to single user mode",
|
|
_PATH_BSHELL, _PATH_RUNDOWN);
|
|
return -1;
|
|
}
|
|
if (wpid == pid && WIFSTOPPED(status)) {
|
|
warning("init: %s on %s stopped, restarting\n",
|
|
_PATH_BSHELL, _PATH_RUNDOWN);
|
|
kill(pid, SIGCONT);
|
|
wpid = -1;
|
|
}
|
|
} while (wpid != pid && !clang);
|
|
|
|
/* Turn off the alarm */
|
|
alarm(0);
|
|
|
|
if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM &&
|
|
requested_transition == catatonia) {
|
|
/*
|
|
* /etc/rc.shutdown executed /sbin/reboot;
|
|
* wait for the end quietly
|
|
*/
|
|
sigset_t s;
|
|
|
|
sigfillset(&s);
|
|
for (;;)
|
|
sigsuspend(&s);
|
|
}
|
|
|
|
if (!WIFEXITED(status)) {
|
|
warning("%s on %s terminated abnormally, going to single user mode",
|
|
_PATH_BSHELL, _PATH_RUNDOWN);
|
|
return -2;
|
|
}
|
|
|
|
if ((status = WEXITSTATUS(status)) != 0)
|
|
warning("%s returned status %d", _PATH_RUNDOWN, status);
|
|
|
|
return status;
|
|
}
|
|
|
|
char *
|
|
strk (char *p)
|
|
{
|
|
static char *t;
|
|
char *q;
|
|
int c;
|
|
|
|
if (p)
|
|
t = p;
|
|
if (!t)
|
|
return 0;
|
|
|
|
c = *t;
|
|
while (c == ' ' || c == '\t' )
|
|
c = *++t;
|
|
if (!c) {
|
|
t = 0;
|
|
return 0;
|
|
}
|
|
q = t;
|
|
if (c == '\'') {
|
|
c = *++t;
|
|
q = t;
|
|
while (c && c != '\'')
|
|
c = *++t;
|
|
if (!c) /* unterminated string */
|
|
q = t = 0;
|
|
else
|
|
*t++ = 0;
|
|
} else {
|
|
while (c && c != ' ' && c != '\t' )
|
|
c = *++t;
|
|
*t++ = 0;
|
|
if (!c)
|
|
t = 0;
|
|
}
|
|
return q;
|
|
}
|
|
|
|
#ifdef LOGIN_CAP
|
|
void
|
|
setprocresources(cname)
|
|
const char *cname;
|
|
{
|
|
login_cap_t *lc;
|
|
if ((lc = login_getclassbyname(cname, NULL)) != NULL) {
|
|
setusercontext(lc, (struct passwd*)NULL, 0, LOGIN_SETPRIORITY|LOGIN_SETRESOURCES);
|
|
login_close(lc);
|
|
}
|
|
}
|
|
#endif
|