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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
*
* $Id: 2f51cc05b9f2db41c73282c5f50cb25bf9c2ce89 $
*
* Copyright (c) 1987, 1993 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include <sysdep.h>
#include <zephyr/mit-copyright.h>
#include <zephyr/zephyr.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/nameser.h>
#ifndef lint
static const char rcsid_zshutdown_notify_c[] =
"$Id: 2f51cc05b9f2db41c73282c5f50cb25bf9c2ce89 $";
#endif
#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 HAVE_KRB4
#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 by typing detach -host %s";
/*ARGSUSED*/
int
main(int argc,
char *argv[])
{
ZNotice_t notice;
struct hostent *hp;
int retval;
char hostname[NS_MAXDNAME];
char msgbuff[BUFSIZ], message[Z_MAXPKTLEN], *ptr;
char scratch[BUFSIZ];
char *msg[N_FIELD_CNT];
#ifdef HAVE_KRB4
char tkt_filename[MAXPATHLEN];
char rlm[REALM_SZ];
char hn2[NS_MAXDNAME];
char *cp;
#endif
if (gethostname(hostname, sizeof(hostname)) < 0) {
com_err(argv[0], errno, "while finding hostname");
exit(1);
}
if ((hp = gethostbyname(hostname)) != NULL)
(void) strcpy(hostname, hp->h_name);
msg[0] = hostname;
msg[1] = message;
sprintf(scratch, warning, hostname);
msg[2] = scratch;
#ifdef HAVE_KRB4
(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);
}
retval = krb_get_lrealm(rlm, 1);
if (retval) {
fprintf(stderr, "%s: can't get local realm: %s\n",
argv[0], krb_get_err_text(retval));
exit(1);
}
retval = krb_get_svc_in_tkt(SVC_NAME, hn2, rlm,
SERVER_SERVICE, SERVER_INSTANCE, 1,
(char *)KEYFILE);
if (retval) {
fprintf(stderr, "%s: can't get tickets: %s\n",
argv[0], krb_get_err_text(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);
}
(void) memset((char *)¬ice, 0, sizeof(notice));
notice.z_kind = N_KIND;
notice.z_port = 0;
notice.z_charset = ZCHARSET_UNKNOWN;
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;
retval = ZSendList(¬ice, msg, N_FIELD_CNT, ZAUTH);
#ifdef HAVE_KRB4
(void) dest_tkt();
#endif
if (retval != ZERR_NONE) {
com_err(argv[0], retval, "while sending notice");
exit(1);
}
return 0;
}
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