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/* This file is part of the Project Athena Zephyr Notification System.
* It contains code for "zshutdown_notify", a utility called by
* shutdown(8) to do Zephyr notification on shutdown.
*
* Created by: C. Anthony Della Fera
*
* $Source$
* $Author$
*
* Copyright (c) 1987 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include <zephyr/mit-copyright.h>
#include <zephyr/zephyr.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#ifndef lint
#ifndef SABER
static char *rcsid_zshutdown_notify_c = "$Header$";
#endif /* SABER */
#endif /* lint */
#define N_KIND UNSAFE
#define N_CLASS "FILSRV"
#define N_OPCODE "SHUTDOWN"
#define N_DEF_FORMAT "From $sender:\n@bold(Shutdown message from $1 at $time)\n@center(System going down, message is:)\n\n$2\n\n@center(@bold($3))"
#define N_FIELD_CNT 3
#ifdef KERBEROS
#define SVC_NAME "rcmd"
#endif
/*
* Standard warning strings appended as extra fields to
* the message body.
*/
static char warning[] = "Please detach any filesystems you may have\nattached from this host!";
/*ARGSUSED*/
main(argc,argv)
int argc;
char *argv[];
{
ZNotice_t notice;
struct hostent *hp;
int retval;
char hostname[MAXHOSTNAMELEN];
char msgbuff[BUFSIZ], message[Z_MAXPKTLEN], *ptr;
char *msg[N_FIELD_CNT];
#ifdef KERBEROS
char tkt_filename[MAXPATHLEN];
char rlm[REALM_SZ];
char hn2[MAXHOSTNAMELEN];
char *cp;
extern char *krb_get_phost();
#endif
msg[0] = hostname;
msg[1] = message;
msg[2] = warning;
if (gethostname(hostname, MAXHOSTNAMELEN) < 0) {
com_err(argv[0], errno, "while finding hostname");
exit(1);
}
if ((hp = gethostbyname(hostname)) != NULL)
(void) strcpy(hostname, hp->h_name);
#ifdef KERBEROS
(void) sprintf(tkt_filename, "/tmp/tkt_zshut_%d", getpid());
krb_set_tkt_string(tkt_filename);
cp = krb_get_phost(hostname);
if (cp)
(void) strcpy(hn2, cp);
else {
fprintf(stderr, "%s: can't figure out canonical hostname\n",argv[0]);
exit(1);
}
if (retval = krb_get_lrealm(rlm, 1)) {
fprintf(stderr, "%s: can't get local realm: %s\n",
argv[0], krb_err_txt[retval]);
exit(1);
}
if (retval = krb_get_svc_in_tkt(SVC_NAME, hn2, rlm,
SERVER_SERVICE, SERVER_INSTANCE, 1,
KEYFILE)) {
fprintf(stderr, "%s: can't get tickets: %s\n",
argv[0], krb_err_txt[retval]);
exit(1);
}
#endif
if ((retval = ZInitialize()) != ZERR_NONE) {
com_err(argv[0], retval, "while initializing");
exit(1);
}
ptr = message;
for (;;) {
if (!fgets(msgbuff, sizeof(msgbuff), stdin))
break;
if ((strlen(msgbuff) + (ptr - message)) > Z_MAXPKTLEN){
break;
}
(void) strcpy(ptr, msgbuff);
ptr += strlen(ptr);
}
_BZERO((char *)¬ice, sizeof(notice));
notice.z_kind = N_KIND;
notice.z_port = 0;
notice.z_class = N_CLASS;
notice.z_class_inst = hostname;
notice.z_opcode = N_OPCODE;
notice.z_sender = 0;
notice.z_message_len = 0;
notice.z_recipient = "";
notice.z_default_format = N_DEF_FORMAT;
if ((retval = ZSendList(¬ice, msg, N_FIELD_CNT, ZAUTH)) != ZERR_NONE) {
com_err(argv[0], retval, "while sending notice");
#ifdef KERBEROS
(void) dest_tkt();
#endif
exit(1);
}
#ifdef KERBEROS
(void) dest_tkt();
#endif
}
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