1331722Seadler/* 21592Srgrimes * Copyright (c) 1983, 1993 31592Srgrimes * The Regents of the University of California. All rights reserved. 41592Srgrimes * 51592Srgrimes * Redistribution and use in source and binary forms, with or without 61592Srgrimes * modification, are permitted provided that the following conditions 71592Srgrimes * are met: 81592Srgrimes * 1. Redistributions of source code must retain the above copyright 91592Srgrimes * notice, this list of conditions and the following disclaimer. 101592Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111592Srgrimes * notice, this list of conditions and the following disclaimer in the 121592Srgrimes * documentation and/or other materials provided with the distribution. 13262136Sbrueffer * 3. Neither the name of the University nor the names of its contributors 141592Srgrimes * may be used to endorse or promote products derived from this software 151592Srgrimes * without specific prior written permission. 161592Srgrimes * 171592Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181592Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191592Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201592Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211592Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221592Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231592Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241592Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251592Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261592Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271592Srgrimes * SUCH DAMAGE. 281592Srgrimes */ 291592Srgrimes 301592Srgrimes#ifndef lint 3131491Scharnier#if 0 3221838Spststatic char sccsid[] = "@(#)announce.c 8.3 (Berkeley) 4/28/95"; 3331491Scharnier#endif 3431491Scharnierstatic const char rcsid[] = 3550476Speter "$FreeBSD$"; 361592Srgrimes#endif /* not lint */ 371592Srgrimes 381592Srgrimes#include <sys/types.h> 391592Srgrimes#include <sys/uio.h> 401592Srgrimes#include <sys/stat.h> 411592Srgrimes#include <sys/time.h> 421592Srgrimes#include <sys/wait.h> 431592Srgrimes#include <sys/socket.h> 4421838Spst 451592Srgrimes#include <protocols/talkd.h> 4621838Spst 471592Srgrimes#include <errno.h> 4821838Spst#include <paths.h> 4921838Spst#include <stdio.h> 5021838Spst#include <stdlib.h> 5121838Spst#include <string.h> 521592Srgrimes#include <syslog.h> 531592Srgrimes#include <unistd.h> 5421838Spst#include <vis.h> 551592Srgrimes 5683244Sdd#include "ttymsg.h" 5790261Simp#include "extern.h" 5883244Sdd 591592Srgrimes/* 601592Srgrimes * Announce an invitation to talk. 611592Srgrimes */ 628870Srgrimes 631592Srgrimes/* 648870Srgrimes * See if the user is accepting messages. If so, announce that 651592Srgrimes * a talk is requested. 661592Srgrimes */ 6731491Scharnierint 6890261Simpannounce(CTL_MSG *request, const char *remote_machine) 691592Srgrimes{ 701592Srgrimes char full_tty[32]; 711592Srgrimes struct stat stbuf; 721592Srgrimes 731592Srgrimes (void)snprintf(full_tty, sizeof(full_tty), 741592Srgrimes "%s%s", _PATH_DEV, request->r_tty); 751592Srgrimes if (stat(full_tty, &stbuf) < 0 || (stbuf.st_mode&020) == 0) 761592Srgrimes return (PERMISSION_DENIED); 77112998Sjmallett return (print_mesg(request->r_tty, request, remote_machine)); 781592Srgrimes} 791592Srgrimes 801592Srgrimes#define max(a,b) ( (a) > (b) ? (a) : (b) ) 811592Srgrimes#define N_LINES 5 8221838Spst#define N_CHARS 256 831592Srgrimes 841592Srgrimes/* 858870Srgrimes * Build a block of characters containing the message. 861592Srgrimes * It is sent blank filled and in a single block to 871592Srgrimes * try to keep the message in one piece if the recipient 88177626Sbrueffer * in vi at the time 891592Srgrimes */ 9031491Scharnierint 91112998Sjmallettprint_mesg(const char *tty, CTL_MSG *request, 9290261Simp const char *remote_machine) 931592Srgrimes{ 94112998Sjmallett struct timeval now; 9537262Sbde time_t clock_sec; 961592Srgrimes struct tm *localclock; 971592Srgrimes struct iovec iovec; 981592Srgrimes char line_buf[N_LINES][N_CHARS]; 991592Srgrimes int sizes[N_LINES]; 1001592Srgrimes char big_buf[N_LINES*N_CHARS]; 10121838Spst char *bptr, *lptr, *vis_user; 1021592Srgrimes int i, j, max_size; 1031592Srgrimes 1041592Srgrimes i = 0; 1051592Srgrimes max_size = 0; 106211056Sed gettimeofday(&now, NULL); 107112998Sjmallett clock_sec = now.tv_sec; 10837262Sbde localclock = localtime(&clock_sec); 10921838Spst (void)snprintf(line_buf[i], N_CHARS, " "); 1101592Srgrimes sizes[i] = strlen(line_buf[i]); 1111592Srgrimes max_size = max(max_size, sizes[i]); 1121592Srgrimes i++; 11321838Spst (void)snprintf(line_buf[i], N_CHARS, 11477862Sdd "Message from Talk_Daemon@%s at %d:%02d on %d/%.2d/%.2d ...", 11577862Sdd hostname, localclock->tm_hour , localclock->tm_min, 11679674Sbrian localclock->tm_year + 1900, localclock->tm_mon + 1, 11777862Sdd localclock->tm_mday); 1181592Srgrimes sizes[i] = strlen(line_buf[i]); 1191592Srgrimes max_size = max(max_size, sizes[i]); 1201592Srgrimes i++; 12121838Spst 12221838Spst vis_user = malloc(strlen(request->l_name) * 4 + 1); 12321838Spst strvis(vis_user, request->l_name, VIS_CSTYLE); 12421838Spst (void)snprintf(line_buf[i], N_CHARS, 12521838Spst "talk: connection requested by %s@%s", vis_user, remote_machine); 1261592Srgrimes sizes[i] = strlen(line_buf[i]); 1271592Srgrimes max_size = max(max_size, sizes[i]); 1281592Srgrimes i++; 12921838Spst (void)snprintf(line_buf[i], N_CHARS, "talk: respond with: talk %s@%s", 13021838Spst vis_user, remote_machine); 1311592Srgrimes sizes[i] = strlen(line_buf[i]); 1321592Srgrimes max_size = max(max_size, sizes[i]); 1331592Srgrimes i++; 13421838Spst (void)snprintf(line_buf[i], N_CHARS, " "); 1351592Srgrimes sizes[i] = strlen(line_buf[i]); 1361592Srgrimes max_size = max(max_size, sizes[i]); 1371592Srgrimes i++; 1381592Srgrimes bptr = big_buf; 1391801Sphk *bptr++ = '\007'; /* send something to wake them up */ 1401592Srgrimes *bptr++ = '\r'; /* add a \r in case of raw mode */ 1411592Srgrimes *bptr++ = '\n'; 1421592Srgrimes for (i = 0; i < N_LINES; i++) { 1431592Srgrimes /* copy the line into the big buffer */ 1441592Srgrimes lptr = line_buf[i]; 1451592Srgrimes while (*lptr != '\0') 1461592Srgrimes *(bptr++) = *(lptr++); 1471592Srgrimes /* pad out the rest of the lines with blanks */ 1481592Srgrimes for (j = sizes[i]; j < max_size + 2; j++) 1491592Srgrimes *(bptr++) = ' '; 1501592Srgrimes *(bptr++) = '\r'; /* add a \r in case of raw mode */ 1511592Srgrimes *(bptr++) = '\n'; 1521592Srgrimes } 1531592Srgrimes *bptr = '\0'; 1541592Srgrimes iovec.iov_base = big_buf; 1551592Srgrimes iovec.iov_len = bptr - big_buf; 1561592Srgrimes /* 1571592Srgrimes * we choose a timeout of RING_WAIT-5 seconds so that we don't 1581592Srgrimes * stack up processes trying to write messages to a tty 1591592Srgrimes * that is permanently blocked. 1601592Srgrimes */ 1611592Srgrimes if (ttymsg(&iovec, 1, tty, RING_WAIT - 5) != NULL) 1621592Srgrimes return (FAILED); 1631592Srgrimes 1641592Srgrimes return (SUCCESS); 1651592Srgrimes} 166