1ea022d16SRodney W. Grimes /* 2ea022d16SRodney W. Grimes * Copyright (c) 1983, 1993 3ea022d16SRodney W. Grimes * The Regents of the University of California. All rights reserved. 4ea022d16SRodney W. Grimes * 5ea022d16SRodney W. Grimes * Redistribution and use in source and binary forms, with or without 6ea022d16SRodney W. Grimes * modification, are permitted provided that the following conditions 7ea022d16SRodney W. Grimes * are met: 8ea022d16SRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 9ea022d16SRodney W. Grimes * notice, this list of conditions and the following disclaimer. 10ea022d16SRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 11ea022d16SRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 12ea022d16SRodney W. Grimes * documentation and/or other materials provided with the distribution. 13ea022d16SRodney W. Grimes * 3. All advertising materials mentioning features or use of this software 14ea022d16SRodney W. Grimes * must display the following acknowledgement: 15ea022d16SRodney W. Grimes * This product includes software developed by the University of 16ea022d16SRodney W. Grimes * California, Berkeley and its contributors. 17ea022d16SRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 18ea022d16SRodney W. Grimes * may be used to endorse or promote products derived from this software 19ea022d16SRodney W. Grimes * without specific prior written permission. 20ea022d16SRodney W. Grimes * 21ea022d16SRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22ea022d16SRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23ea022d16SRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24ea022d16SRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25ea022d16SRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26ea022d16SRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27ea022d16SRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28ea022d16SRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29ea022d16SRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30ea022d16SRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31ea022d16SRodney W. Grimes * SUCH DAMAGE. 32ea022d16SRodney W. Grimes */ 33ea022d16SRodney W. Grimes 34ea022d16SRodney W. Grimes #ifndef lint 35a846453cSPhilippe Charnier #if 0 36dfe0d215SPaul Traina static char sccsid[] = "@(#)announce.c 8.3 (Berkeley) 4/28/95"; 37a846453cSPhilippe Charnier #endif 38a846453cSPhilippe Charnier static const char rcsid[] = 397f3dea24SPeter Wemm "$FreeBSD$"; 40ea022d16SRodney W. Grimes #endif /* not lint */ 41ea022d16SRodney W. Grimes 42ea022d16SRodney W. Grimes #include <sys/types.h> 43ea022d16SRodney W. Grimes #include <sys/uio.h> 44ea022d16SRodney W. Grimes #include <sys/stat.h> 45ea022d16SRodney W. Grimes #include <sys/time.h> 46ea022d16SRodney W. Grimes #include <sys/wait.h> 47ea022d16SRodney W. Grimes #include <sys/socket.h> 48dfe0d215SPaul Traina 49ea022d16SRodney W. Grimes #include <protocols/talkd.h> 50dfe0d215SPaul Traina 51ea022d16SRodney W. Grimes #include <errno.h> 52dfe0d215SPaul Traina #include <paths.h> 53dfe0d215SPaul Traina #include <stdio.h> 54dfe0d215SPaul Traina #include <stdlib.h> 55dfe0d215SPaul Traina #include <string.h> 56ea022d16SRodney W. Grimes #include <syslog.h> 57ea022d16SRodney W. Grimes #include <unistd.h> 58dfe0d215SPaul Traina #include <vis.h> 59ea022d16SRodney W. Grimes 60f218b7fcSDima Dorfman #include "ttymsg.h" 610b67b493SWarner Losh #include "extern.h" 62f218b7fcSDima Dorfman 63ea022d16SRodney W. Grimes extern char hostname[]; 64ea022d16SRodney W. Grimes 65ea022d16SRodney W. Grimes /* 66ea022d16SRodney W. Grimes * Announce an invitation to talk. 67ea022d16SRodney W. Grimes */ 68ea022d16SRodney W. Grimes 69ea022d16SRodney W. Grimes /* 70ea022d16SRodney W. Grimes * See if the user is accepting messages. If so, announce that 71ea022d16SRodney W. Grimes * a talk is requested. 72ea022d16SRodney W. Grimes */ 73a846453cSPhilippe Charnier int 740b67b493SWarner Losh announce(CTL_MSG *request, const char *remote_machine) 75ea022d16SRodney W. Grimes { 76ea022d16SRodney W. Grimes char full_tty[32]; 77ea022d16SRodney W. Grimes struct stat stbuf; 78ea022d16SRodney W. Grimes 79ea022d16SRodney W. Grimes (void)snprintf(full_tty, sizeof(full_tty), 80ea022d16SRodney W. Grimes "%s%s", _PATH_DEV, request->r_tty); 81ea022d16SRodney W. Grimes if (stat(full_tty, &stbuf) < 0 || (stbuf.st_mode&020) == 0) 82ea022d16SRodney W. Grimes return (PERMISSION_DENIED); 8302a0965eSJuli Mallett return (print_mesg(request->r_tty, request, remote_machine)); 84ea022d16SRodney W. Grimes } 85ea022d16SRodney W. Grimes 86ea022d16SRodney W. Grimes #define max(a,b) ( (a) > (b) ? (a) : (b) ) 87ea022d16SRodney W. Grimes #define N_LINES 5 88dfe0d215SPaul Traina #define N_CHARS 256 89ea022d16SRodney W. Grimes 90ea022d16SRodney W. Grimes /* 91ea022d16SRodney W. Grimes * Build a block of characters containing the message. 92ea022d16SRodney W. Grimes * It is sent blank filled and in a single block to 93ea022d16SRodney W. Grimes * try to keep the message in one piece if the recipient 94662cac9fSChristian Brueffer * in vi at the time 95ea022d16SRodney W. Grimes */ 96a846453cSPhilippe Charnier int 9702a0965eSJuli Mallett print_mesg(const char *tty, CTL_MSG *request, 980b67b493SWarner Losh const char *remote_machine) 99ea022d16SRodney W. Grimes { 10002a0965eSJuli Mallett struct timeval now; 101375557fcSBruce Evans time_t clock_sec; 102ea022d16SRodney W. Grimes struct timezone zone; 103ea022d16SRodney W. Grimes struct tm *localclock; 104ea022d16SRodney W. Grimes struct iovec iovec; 105ea022d16SRodney W. Grimes char line_buf[N_LINES][N_CHARS]; 106ea022d16SRodney W. Grimes int sizes[N_LINES]; 107ea022d16SRodney W. Grimes char big_buf[N_LINES*N_CHARS]; 108dfe0d215SPaul Traina char *bptr, *lptr, *vis_user; 109ea022d16SRodney W. Grimes int i, j, max_size; 110ea022d16SRodney W. Grimes 111ea022d16SRodney W. Grimes i = 0; 112ea022d16SRodney W. Grimes max_size = 0; 11302a0965eSJuli Mallett gettimeofday(&now, &zone); 11402a0965eSJuli Mallett clock_sec = now.tv_sec; 115375557fcSBruce Evans localclock = localtime(&clock_sec); 116dfe0d215SPaul Traina (void)snprintf(line_buf[i], N_CHARS, " "); 117ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 118ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 119ea022d16SRodney W. Grimes i++; 120dfe0d215SPaul Traina (void)snprintf(line_buf[i], N_CHARS, 1214513fdecSDima Dorfman "Message from Talk_Daemon@%s at %d:%02d on %d/%.2d/%.2d ...", 1224513fdecSDima Dorfman hostname, localclock->tm_hour , localclock->tm_min, 12376dada46SBrian Somers localclock->tm_year + 1900, localclock->tm_mon + 1, 1244513fdecSDima Dorfman localclock->tm_mday); 125ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 126ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 127ea022d16SRodney W. Grimes i++; 128dfe0d215SPaul Traina 129dfe0d215SPaul Traina vis_user = malloc(strlen(request->l_name) * 4 + 1); 130dfe0d215SPaul Traina strvis(vis_user, request->l_name, VIS_CSTYLE); 131dfe0d215SPaul Traina (void)snprintf(line_buf[i], N_CHARS, 132dfe0d215SPaul Traina "talk: connection requested by %s@%s", vis_user, remote_machine); 133ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 134ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 135ea022d16SRodney W. Grimes i++; 136dfe0d215SPaul Traina (void)snprintf(line_buf[i], N_CHARS, "talk: respond with: talk %s@%s", 137dfe0d215SPaul Traina vis_user, remote_machine); 138ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 139ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 140ea022d16SRodney W. Grimes i++; 141dfe0d215SPaul Traina (void)snprintf(line_buf[i], N_CHARS, " "); 142ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 143ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 144ea022d16SRodney W. Grimes i++; 145ea022d16SRodney W. Grimes bptr = big_buf; 146331d599dSPoul-Henning Kamp *bptr++ = '\007'; /* send something to wake them up */ 147ea022d16SRodney W. Grimes *bptr++ = '\r'; /* add a \r in case of raw mode */ 148ea022d16SRodney W. Grimes *bptr++ = '\n'; 149ea022d16SRodney W. Grimes for (i = 0; i < N_LINES; i++) { 150ea022d16SRodney W. Grimes /* copy the line into the big buffer */ 151ea022d16SRodney W. Grimes lptr = line_buf[i]; 152ea022d16SRodney W. Grimes while (*lptr != '\0') 153ea022d16SRodney W. Grimes *(bptr++) = *(lptr++); 154ea022d16SRodney W. Grimes /* pad out the rest of the lines with blanks */ 155ea022d16SRodney W. Grimes for (j = sizes[i]; j < max_size + 2; j++) 156ea022d16SRodney W. Grimes *(bptr++) = ' '; 157ea022d16SRodney W. Grimes *(bptr++) = '\r'; /* add a \r in case of raw mode */ 158ea022d16SRodney W. Grimes *(bptr++) = '\n'; 159ea022d16SRodney W. Grimes } 160ea022d16SRodney W. Grimes *bptr = '\0'; 161ea022d16SRodney W. Grimes iovec.iov_base = big_buf; 162ea022d16SRodney W. Grimes iovec.iov_len = bptr - big_buf; 163ea022d16SRodney W. Grimes /* 164ea022d16SRodney W. Grimes * we choose a timeout of RING_WAIT-5 seconds so that we don't 165ea022d16SRodney W. Grimes * stack up processes trying to write messages to a tty 166ea022d16SRodney W. Grimes * that is permanently blocked. 167ea022d16SRodney W. Grimes */ 168ea022d16SRodney W. Grimes if (ttymsg(&iovec, 1, tty, RING_WAIT - 5) != NULL) 169ea022d16SRodney W. Grimes return (FAILED); 170ea022d16SRodney W. Grimes 171ea022d16SRodney W. Grimes return (SUCCESS); 172ea022d16SRodney W. Grimes } 173