github.com/Arquivotheca.SunOS-4.1.4
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
Files
ff309bfe1c8e554728af4b8a4e9cee4d026a7e35
Arquivotheca.SunOS-4.1.4/etc/shutdown.c
seta75D ff309bfe1c Init
2021-10-11 18:37:13 -03:00

676 lines
15 KiB
C
Raw Blame History

/*
* Copyright (c) 1983,1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983,1986 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint
#ifndef lint
static char sccsid[] = "@(#)shutdown.c 1.1 94/10/31 SMI"; /* from UCB 5.6 5/26/86 */
#endif not lint
#include <stdio.h>
#include <ctype.h>
#include <signal.h>
#include <setjmp.h>
#include <utmp.h>
#include <fcntl.h>
#include <pwd.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/param.h>
#include <sys/syslog.h>
#include <sys/label.h>
#include <sys/audit.h>
#include <sys/types.h>
#include <sys/errno.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <nfs/nfs.h>
#include <rpcsvc/mount.h>
#include <rpcsvc/rwall.h>
#include <sys/socket.h>
#include <netdb.h>
/*
* /usr/etc/shutdown when [messages]
*
* allow super users to tell users and remind users
* of iminent shutdown of unix
* and shut it down automatically
* and even reboot or halt the machine if they desire
*/
#define EPATH "PATH=/bin:/usr/bin:/usr/etc:"
#define REBOOT "reboot"
#define HALT "halt"
#define MAXINTS 20
#define HOURS *3600
#define MINUTES *60
#define SECONDS
#define NLOG 600 /* no of bytes possible for message */
#define NOLOGTIME 5 MINUTES
#define IGNOREUSER "sleeper"
struct hostlist {
char *host;
struct hostlist *nxt;
} *hostlist;
char hostname[MAXHOSTNAMELEN];
char buf[BUFSIZ];
char *audit_argv[] = { "shutdown", "X", "" };
void timeout();
time_t getsdt();
extern char *malloc();
extern char *ctime();
extern struct tm *localtime();
extern long time();
extern char *strcpy();
extern char *strncat();
extern off_t lseek();
struct utmp utmp;
int sint;
int stogo;
char tpath[] = "/dev/";
int nlflag = 1; /* nolog yet to be done */
int killflg = 1;
int doreboot = 0;
int halt = 0;
int fast = 0;
char *nosync = NULL;
char nosyncflag[] = "-n";
char term[sizeof tpath + sizeof utmp.ut_line];
char tbuf[BUFSIZ];
char nolog1[] = "\n\nNO LOGINS: System going down at %5.5s\n\n";
char nolog2[NLOG+1];
#ifdef DEBUG
char nologin[] = "nologin";
char fastboot[] = "fastboot";
#else
char nologin[] = "/etc/nologin";
char fastboot[] = "/fastboot";
#endif
time_t nowtime;
jmp_buf alarmbuf;
struct interval {
int stogo;
int sint;
} interval[] = {
4 HOURS, 1 HOURS,
2 HOURS, 30 MINUTES,
1 HOURS, 15 MINUTES,
30 MINUTES, 10 MINUTES,
15 MINUTES, 5 MINUTES,
10 MINUTES, 5 MINUTES,
5 MINUTES, 3 MINUTES,
2 MINUTES, 1 MINUTES,
1 MINUTES, 30 SECONDS,
0 SECONDS, 0 SECONDS
};
char *shutter, *getlogin();
main(argc,argv)
int argc;
char **argv;
{
register i, ufd;
register char *f;
char *ts;
time_t sdt;
int h, m;
int first;
void finish_sig();
FILE *termf;
struct passwd *pw, *getpwuid();
extern char *strcat();
extern uid_t geteuid();
struct hostlist *hl;
char *shutdown_program;
char *shutdown_action;
int fd;
audit_args(AU_MAJPRIV, argc, argv);
shutter = getlogin();
if (shutter == 0 && (pw = getpwuid(getuid())))
shutter = pw->pw_name;
if (shutter == 0)
shutter = "???";
(void) gethostname(hostname, sizeof (hostname));
openlog("shutdown", 0, LOG_AUTH);
argc--, argv++;
while (argc > 0 && (f = argv[0], *f++ == '-')) {
while (i = *f++) switch (i) {
case 'k':
killflg = 0;
continue;
case 'n':
nosync = nosyncflag;
continue;
case 'f':
fast = 1;
continue;
case 'r':
doreboot = 1;
continue;
case 'h':
halt = 1;
continue;
default:
(void) fprintf(stderr,
"shutdown: '%c' - unknown flag\n", i);
audit_argv[1][0] = i;
audit_argv[2] = " - unknown flag";
audit_text(AU_MAJPRIV, 1, 1, 3, audit_argv);
(void) fprintf(stderr,
"Usage: shutdown [ -krhfn ] shutdowntime [ message ]\n");
finish("Usage: shutdown [ -krhfn ] shutdowntime [ message ]",
"", 1);
}
argc--, argv++;
}
if (argc < 1) {
(void) fprintf(stderr,
"Usage: shutdown [ -krhfn ] shutdowntime [ message ]\n");
finish("Usage: shutdown [ -krhfn ] shutdowntime [ message ]",
"", 1);
}
if (doreboot && halt) {
(void) fprintf(stderr,
"shutdown: Incompatible switches '-r' & '-h'\n");
finish("shutdown: Incompatible switches '-r' & '-h'",
"", 1);
}
if (fast && (nosync == nosyncflag)) {
(void) fprintf(stderr,
"shutdown: Incompatible switches '-f' & '-n'\n");
finish("shutdown: Incompatible switches '-f' & '-n'",
"", 1);
}
if (geteuid()) {
(void) fprintf(stderr, "shutdown: NOT super-user\n");
finish("shutdown: NOT super-user", "", 1);
}
gethostlist();
nowtime = time((long *)0);
sdt = getsdt(argv[0]);
argc--, argv++;
nolog2[0] = '\0';
i = 0;
while (argc-- > 0) {
if (i + strlen(*argv) > NLOG)
break; /* no more room for the message */
i += strlen(*argv) + 1;
(void) strcat(nolog2, *argv++);
(void) strcat(nolog2, " ");
}
if (i != 0)
nolog2[i - 1] = '\0'; /* remove trailing blank */
m = ((stogo = sdt - nowtime) + 30)/60;
h = m/60;
m %= 60;
ts = ctime(&sdt);
(void) printf("Shutdown at %5.5s (in ", ts+11);
if (h > 0)
(void) printf("%d hour%s ", h, h != 1 ? "s" : "");
(void) printf("%d minute%s) ", m, m != 1 ? "s" : "");
#ifndef DEBUG
(void) signal(SIGHUP, SIG_IGN);
(void) signal(SIGQUIT, SIG_IGN);
(void) signal(SIGINT, SIG_IGN);
#endif
(void) signal(SIGTTOU, SIG_IGN);
(void) signal(SIGTERM, finish_sig);
(void) signal(SIGALRM, timeout);
(void) setpriority(PRIO_PROCESS, 0, PRIO_MIN);
(void) fflush(stdout);
#ifndef DEBUG
if (i = fork()) {
(void) printf("[pid %d]\n", i);
exit(0);
}
#else
(void) putc('\n', stdout);
#endif
sint = 1 HOURS;
f = "";
ufd = open("/etc/utmp",0);
if (ufd < 0) {
perror("shutdown: /etc/utmp");
audit_argv[1] = "failure to open /etc/utmp";
audit_text(AU_MAJPRIV, 1, 1, 2, audit_argv);
exit(1);
}
first = 1;
if (doreboot) {
shutdown_program = REBOOT;
shutdown_action = "reboot";
} else if (halt) {
shutdown_program = HALT;
shutdown_action = "halt";
} else {
shutdown_program = NULL;
shutdown_action = "shutdown";
}
for (;;) {
for (i = 0; stogo <= interval[i].stogo && interval[i].sint; i++)
sint = interval[i].sint;
if (stogo > 0 && (stogo-sint) < interval[i].stogo)
sint = stogo - interval[i].stogo;
if (stogo <= NOLOGTIME && nlflag) {
nlflag = 0;
nolog(sdt);
}
if (sint >= stogo || sint == 0)
f = "FINAL ";
nowtime = time((long *)0);
(void) lseek(ufd, 0L, 0);
while (read(ufd,(char *)&utmp,sizeof utmp)==sizeof utmp)
if (utmp.ut_name[0] &&
strncmp(utmp.ut_name, IGNOREUSER, sizeof(utmp.ut_name))) {
/*
* don't write to pty's unless they are rlogin sessions
*/
if (nonuser(utmp))
continue;
if (setjmp(alarmbuf))
continue;
(void) strcpy(term, tpath);
(void) strncat(term, utmp.ut_line, sizeof utmp.ut_line);
(void) alarm(5);
/* check if device is really a tty - bugid 1140162 */
if ((fd = open(term, O_WRONLY|O_NOCTTY)) == -1) {
fprintf(stderr,"Cannot open %s\n",term);
(void) alarm(0);
continue;
} else {
if (!isatty(fd)) {
fprintf(stderr,"%s in utmp is not a tty\n",utmp.ut_line);
syslog(LOG_CRIT, "%.*s in utmp is not a tty\n",
sizeof(utmp.ut_line), utmp.ut_line);
close(fd);
(void) alarm(0);
continue;
}
}
close(fd);
#ifdef DEBUG
if ((termf = stdout) != NULL)
#else
if ((termf = fopen(term, "w")) != NULL)
#endif
{
(void) alarm(0);
setbuf(termf, tbuf);
(void) fprintf(termf, "\n\r\n");
warn(termf, sdt, nowtime, f, first);
(void) alarm(5);
#ifdef DEBUG
(void) fflush(termf);
#else
(void) fclose(termf);
#endif
(void) alarm(0);
}
}
for (hl = hostlist; hl != NULL; hl = hl->nxt)
rwarn(hl->host, sdt, nowtime, f, first);
if (stogo <= 0) {
(void) printf("\n\007\007System shutdown time has arrived\007\007\n");
if (*nolog2)
syslog(LOG_CRIT, "%s by %s: %s",
shutdown_action, shutter, nolog2);
else
syslog(LOG_CRIT, "%s by %s",
shutdown_action, shutter);
sleep(2);
(void) unlink(nologin);
if (!killflg) {
(void) printf("but you'll have to do it yourself\n");
finish("but you'll have to do it yourself",
"", 0);
}
if (fast)
doitfast();
#ifndef DEBUG
(void) kill(-1, SIGTERM); /* terminate everyone */
sleep(5); /* & wait while they die */
(void) putenv(EPATH);
if (shutdown_program != NULL)
execlp(shutdown_program, shutdown_program,
"-l", nosync, (char *)0);
else {
(void) kill(1, SIGTERM); /* sync */
(void) kill(1, SIGTERM); /* sync */
sleep(20);
}
#else
if (shutdown_program) {
(void) printf("%s ", shutdown_program);
if (fast)
(void) printf("-l (without fsck's)\n");
else if (nosync != NULL)
(void) printf("-l %s\n", nosync);
else
(void) printf("-l\n");
} else {
(void) printf("kill -TERM 1");
if (fast)
(void) printf(" (without fsck's)\n");
else
(void) printf("\n");
}
#endif
finish("", "", 0);
}
stogo = sdt - time((long *) 0);
if (stogo > 0 && sint > 0)
sleep((unsigned)(sint<stogo ? sint : stogo));
stogo -= sint;
first = 0;
}
/* NOTREACHED */
}
time_t
getsdt(s)
register char *s;
{
time_t t, t1, tim;
register char c;
struct tm *lt;
int c_count;
if (strcmp(s, "now") == 0)
return(nowtime);
if (*s == '+') {
++s;
t = 0;
for (c_count = 1;;c_count++) {
c = *s++;
if (!isdigit(c)) {
if (c_count == 1) {
goto badform;
} else {
break;
}
}
t = t * 10 + c - '0';
}
if (t <= 0)
t = 5;
t *= 60;
tim = time((long *) 0) + t;
return(tim);
}
t = 0;
while (strlen(s) > 2 && isdigit(*s))
t = t * 10 + *s++ - '0';
if (*s == ':')
s++;
if (t > 23)
goto badform;
tim = t*60;
t = 0;
while (isdigit(*s))
t = t * 10 + *s++ - '0';
if (t > 59)
goto badform;
tim += t;
tim *= 60;
t1 = time((long *) 0);
lt = localtime(&t1);
t = lt->tm_sec + lt->tm_min*60 + lt->tm_hour*3600;
if (tim < t || tim >= (24*3600)) {
/* before now or after midnight */
(void) printf("That must be tomorrow\nCan't you wait till then?\n");
finish("That must be tomorrow", "Can't you wait till then?",
0);
}
return (t1 + tim - t);
badform:
(void) printf("Bad time format\n");
finish("Bad time format", "", 0);
/*NOTREACHED*/
}
warn(termf, sdt, now, type, first)
FILE *termf;
time_t sdt, now;
char *type;
int first;
{
char *ts;
register delay = sdt - now;
if (delay > 8)
while (delay % 5)
delay++;
(void) fprintf(termf,
"\007\007\t*** %sSystem shutdown message from %s@%s ***\r\n\n",
type, shutter, hostname);
ts = ctime(&sdt);
if (delay > 10 MINUTES)
(void) fprintf(termf, "System going down at %5.5s\r\n", ts+11);
else if (delay > 95 SECONDS) {
(void) fprintf(termf, "System going down in %d minute%s\r\n",
(delay+30)/60, (delay+30)/60 != 1 ? "s" : "");
} else if (delay > 0) {
(void) fprintf(termf, "System going down in %d second%s\r\n",
delay, delay != 1 ? "s" : "");
} else
(void) fprintf(termf, "System going down IMMEDIATELY\r\n");
if (first || sdt - now > 1 MINUTES) {
if (*nolog2)
(void) fprintf(termf, "\t...%s\r\n", nolog2);
}
}
doitfast()
{
FILE *fastd;
if ((fastd = fopen(fastboot, "w")) != NULL) {
(void) putc('\n', fastd);
(void) fclose(fastd);
}
}
rwarn(host, sdt, now, type, first)
char *host;
time_t sdt, now;
char *type;
int first;
{
char *ts;
register delay = sdt - now;
char *bufp;
if (delay > 8)
while (delay % 5)
delay++;
(void) sprintf(buf,
"\007\007\t*** %sShutdown message for %s from %s@%s ***\r\n\n",
type, hostname, shutter, hostname);
ts = ctime(&sdt);
bufp = buf + strlen(buf);
if (delay > 10 MINUTES) {
(void) sprintf(bufp, "%s going down at %5.5s\r\n", hostname,
ts+11);
}
else if (delay > 95 SECONDS) {
(void) sprintf(bufp, "%s going down in %d minute%s\r\n",
hostname, (delay+30)/60, (delay+30)/60 != 1 ? "s" : "");
} else if (delay > 0) {
(void) sprintf(bufp, "%s going down in %d second%s\r\n",
hostname, delay, delay != 1 ? "s" : "");
} else {
(void) sprintf(bufp, "%s going down IMMEDIATELY\r\n",
hostname);
}
bufp = buf + strlen(buf);
if (first || sdt - now > 1 MINUTES) {
if (*nolog2)
(void) sprintf(bufp, "\t...%s\r\n", nolog2);
}
rprintf(host, buf);
}
rprintf(host, bufp)
char *host, *bufp;
{
int err;
#ifdef DEBUG
(void) fprintf(stderr, "about to call %s\n", host);
#endif
if (err = callrpcfast(host, (u_long)WALLPROG, (u_long)WALLVERS,
(u_long)WALLPROC_WALL, xdr_path, (char *)&bufp, xdr_void,
(char *)NULL)) {
#ifdef DEBUG
(void) fprintf(stderr, "couldn't make rpc call: ");
clnt_perrno(err);
(void) fprintf(stderr, "\n");
#endif
}
}
nolog(sdt)
time_t sdt;
{
FILE *nologf;
(void) unlink(nologin); /* in case linked to std file */
if ((nologf = fopen(nologin, "w")) != NULL) {
(void) fprintf(nologf, nolog1, (ctime(&sdt)) + 11);
if (*nolog2)
(void) fprintf(nologf, "\t%s\n", nolog2);
(void) fclose(nologf);
}
}
void
finish_sig()
{
finish("SIGTERM", "", 1);
}
finish(s1, s2, exitcode)
char *s1;
char *s2;
{
(void) signal(SIGTERM, SIG_IGN);
(void) unlink(nologin);
audit_argv[1] = s1;
audit_argv[2] = s2;
audit_text(AU_MAJPRIV, 0, 0, 3, audit_argv);
exit(exitcode);
}
void
timeout()
{
longjmp(alarmbuf, 1);
}
gethostlist()
{
int s;
struct mountlist *ml;
struct hostlist *hl;
struct sockaddr_in addr;
CLIENT *cl;
static struct timeval TIMEOUT = { 25, 0 };
/*
* check for portmapper
*/
get_myaddress(&addr);
s = socket(AF_INET, SOCK_STREAM, 0);
if (s < 0)
return;
if (connect(s, (struct sockaddr *)&addr, sizeof(addr)) < 0)
return;
(void) close(s);
/*
* First try tcp, then drop back to udp if
* tcp is unavailable (an old version of mountd perhaps)
* Using tcp is preferred because it can handle
* arbitrarily long export lists.
*/
cl = clnt_create(hostname, (u_long)MOUNTPROG, (u_long)MOUNTVERS,
"tcp");
if (cl == NULL) {
cl = clnt_create(hostname, (u_long)MOUNTPROG,
(u_long)MOUNTVERS, "udp");
if (cl == NULL) {
if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED) {
clnt_pcreateerror("shutdown warning");
}
return;
}
}
ml = NULL;
if (clnt_call(cl, MOUNTPROC_DUMP,
xdr_void, 0, xdr_mountlist, &ml, TIMEOUT) != RPC_SUCCESS) {
clnt_perror(cl, "shutdown warning");
return;
}
for (; ml != NULL; ml = ml->ml_nxt) {
for (hl = hostlist; hl != NULL; hl = hl->nxt)
if (strcmp(ml->ml_name, hl->host) == 0)
goto again;
hl = (struct hostlist *)malloc(sizeof(struct hostlist));
hl->host = ml->ml_name;
hl->nxt = hostlist;
hostlist = hl;
again:;
}
}
/*
* Don't want to wait for usual portmapper timeout you get with
* callrpc or clnt_call, so use rmtcall instead. Use timeout
* of 8 secs, based on the per try timeout of 3 secs for rmtcall
*/
callrpcfast(host, prognum, versnum, procnum, inproc, in, outproc, out)
char *host;
u_long prognum, versnum, procnum;
xdrproc_t inproc, outproc;
char *in, *out;
{
struct sockaddr_in server_addr;
struct hostent *hp;
struct timeval rpctimeout;
u_long port;
if ((hp = gethostbyname(host)) == NULL)
return ((int) RPC_UNKNOWNHOST);
bcopy(hp->h_addr, (char *)&server_addr.sin_addr, hp->h_length);
server_addr.sin_family = AF_INET;
server_addr.sin_port = 0;
rpctimeout.tv_sec = 8;
rpctimeout.tv_usec = 0;
return ((int) pmap_rmtcall(&server_addr, prognum, versnum, procnum,
inproc, in, outproc, out, rpctimeout, &port));
}
Reference in New Issue View Git Blame Copy Permalink