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 35ea022d16SRodney W. Grimes static char sccsid[] = "@(#)announce.c 8.2 (Berkeley) 1/7/94"; 36ea022d16SRodney W. Grimes #endif /* not lint */ 37ea022d16SRodney W. Grimes 38ea022d16SRodney W. Grimes #include <sys/types.h> 39ea022d16SRodney W. Grimes #include <sys/uio.h> 40ea022d16SRodney W. Grimes #include <sys/stat.h> 41ea022d16SRodney W. Grimes #include <sys/time.h> 42ea022d16SRodney W. Grimes #include <sys/wait.h> 43ea022d16SRodney W. Grimes #include <sys/socket.h> 44ea022d16SRodney W. Grimes #include <protocols/talkd.h> 45ea022d16SRodney W. Grimes #include <sgtty.h> 46ea022d16SRodney W. Grimes #include <errno.h> 47ea022d16SRodney W. Grimes #include <syslog.h> 48ea022d16SRodney W. Grimes #include <unistd.h> 49ea022d16SRodney W. Grimes #include <stdio.h> 50ea022d16SRodney W. Grimes #include <string.h> 51ea022d16SRodney W. Grimes #include <paths.h> 52ea022d16SRodney W. Grimes 53ea022d16SRodney W. Grimes extern char hostname[]; 54ea022d16SRodney W. Grimes 55ea022d16SRodney W. Grimes /* 56ea022d16SRodney W. Grimes * Announce an invitation to talk. 57ea022d16SRodney W. Grimes */ 58ea022d16SRodney W. Grimes 59ea022d16SRodney W. Grimes /* 60ea022d16SRodney W. Grimes * See if the user is accepting messages. If so, announce that 61ea022d16SRodney W. Grimes * a talk is requested. 62ea022d16SRodney W. Grimes */ 63ea022d16SRodney W. Grimes announce(request, remote_machine) 64ea022d16SRodney W. Grimes CTL_MSG *request; 65ea022d16SRodney W. Grimes char *remote_machine; 66ea022d16SRodney W. Grimes { 67ea022d16SRodney W. Grimes char full_tty[32]; 68ea022d16SRodney W. Grimes FILE *tf; 69ea022d16SRodney W. Grimes struct stat stbuf; 70ea022d16SRodney W. Grimes 71ea022d16SRodney W. Grimes (void)snprintf(full_tty, sizeof(full_tty), 72ea022d16SRodney W. Grimes "%s%s", _PATH_DEV, request->r_tty); 73ea022d16SRodney W. Grimes if (stat(full_tty, &stbuf) < 0 || (stbuf.st_mode&020) == 0) 74ea022d16SRodney W. Grimes return (PERMISSION_DENIED); 75ea022d16SRodney W. Grimes return (print_mesg(request->r_tty, tf, request, remote_machine)); 76ea022d16SRodney W. Grimes } 77ea022d16SRodney W. Grimes 78ea022d16SRodney W. Grimes #define max(a,b) ( (a) > (b) ? (a) : (b) ) 79ea022d16SRodney W. Grimes #define N_LINES 5 80ea022d16SRodney W. Grimes #define N_CHARS 120 81ea022d16SRodney W. Grimes 82ea022d16SRodney W. Grimes /* 83ea022d16SRodney W. Grimes * Build a block of characters containing the message. 84ea022d16SRodney W. Grimes * It is sent blank filled and in a single block to 85ea022d16SRodney W. Grimes * try to keep the message in one piece if the recipient 86ea022d16SRodney W. Grimes * in in vi at the time 87ea022d16SRodney W. Grimes */ 88ea022d16SRodney W. Grimes print_mesg(tty, tf, request, remote_machine) 89ea022d16SRodney W. Grimes char *tty; 90ea022d16SRodney W. Grimes FILE *tf; 91ea022d16SRodney W. Grimes CTL_MSG *request; 92ea022d16SRodney W. Grimes char *remote_machine; 93ea022d16SRodney W. Grimes { 94ea022d16SRodney W. Grimes struct timeval clock; 95ea022d16SRodney W. Grimes struct timezone zone; 96ea022d16SRodney W. Grimes struct tm *localtime(); 97ea022d16SRodney W. Grimes struct tm *localclock; 98ea022d16SRodney W. Grimes struct iovec iovec; 99ea022d16SRodney W. Grimes char line_buf[N_LINES][N_CHARS]; 100ea022d16SRodney W. Grimes int sizes[N_LINES]; 101ea022d16SRodney W. Grimes char big_buf[N_LINES*N_CHARS]; 102ea022d16SRodney W. Grimes char *bptr, *lptr, *ttymsg(); 103ea022d16SRodney W. Grimes int i, j, max_size; 104ea022d16SRodney W. Grimes 105ea022d16SRodney W. Grimes i = 0; 106ea022d16SRodney W. Grimes max_size = 0; 107ea022d16SRodney W. Grimes gettimeofday(&clock, &zone); 108ea022d16SRodney W. Grimes localclock = localtime( &clock.tv_sec ); 109ea022d16SRodney W. Grimes (void)sprintf(line_buf[i], " "); 110ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 111ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 112ea022d16SRodney W. Grimes i++; 113ea022d16SRodney W. Grimes (void)sprintf(line_buf[i], "Message from Talk_Daemon@%s at %d:%02d ...", 114ea022d16SRodney W. Grimes hostname, localclock->tm_hour , localclock->tm_min ); 115ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 116ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 117ea022d16SRodney W. Grimes i++; 118ea022d16SRodney W. Grimes (void)sprintf(line_buf[i], "talk: connection requested by %s@%s", 119ea022d16SRodney W. Grimes request->l_name, remote_machine); 120ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 121ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 122ea022d16SRodney W. Grimes i++; 123ea022d16SRodney W. Grimes (void)sprintf(line_buf[i], "talk: respond with: talk %s@%s", 124ea022d16SRodney W. Grimes request->l_name, remote_machine); 125ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 126ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 127ea022d16SRodney W. Grimes i++; 128ea022d16SRodney W. Grimes (void)sprintf(line_buf[i], " "); 129ea022d16SRodney W. Grimes sizes[i] = strlen(line_buf[i]); 130ea022d16SRodney W. Grimes max_size = max(max_size, sizes[i]); 131ea022d16SRodney W. Grimes i++; 132ea022d16SRodney W. Grimes bptr = big_buf; 133331d599dSPoul-Henning Kamp *bptr++ = '\007'; /* send something to wake them up */ 134ea022d16SRodney W. Grimes *bptr++ = '\r'; /* add a \r in case of raw mode */ 135ea022d16SRodney W. Grimes *bptr++ = '\n'; 136ea022d16SRodney W. Grimes for (i = 0; i < N_LINES; i++) { 137ea022d16SRodney W. Grimes /* copy the line into the big buffer */ 138ea022d16SRodney W. Grimes lptr = line_buf[i]; 139ea022d16SRodney W. Grimes while (*lptr != '\0') 140ea022d16SRodney W. Grimes *(bptr++) = *(lptr++); 141ea022d16SRodney W. Grimes /* pad out the rest of the lines with blanks */ 142ea022d16SRodney W. Grimes for (j = sizes[i]; j < max_size + 2; j++) 143ea022d16SRodney W. Grimes *(bptr++) = ' '; 144ea022d16SRodney W. Grimes *(bptr++) = '\r'; /* add a \r in case of raw mode */ 145ea022d16SRodney W. Grimes *(bptr++) = '\n'; 146ea022d16SRodney W. Grimes } 147ea022d16SRodney W. Grimes *bptr = '\0'; 148ea022d16SRodney W. Grimes iovec.iov_base = big_buf; 149ea022d16SRodney W. Grimes iovec.iov_len = bptr - big_buf; 150ea022d16SRodney W. Grimes /* 151ea022d16SRodney W. Grimes * we choose a timeout of RING_WAIT-5 seconds so that we don't 152ea022d16SRodney W. Grimes * stack up processes trying to write messages to a tty 153ea022d16SRodney W. Grimes * that is permanently blocked. 154ea022d16SRodney W. Grimes */ 155ea022d16SRodney W. Grimes if (ttymsg(&iovec, 1, tty, RING_WAIT - 5) != NULL) 156ea022d16SRodney W. Grimes return (FAILED); 157ea022d16SRodney W. Grimes 158ea022d16SRodney W. Grimes return (SUCCESS); 159ea022d16SRodney W. Grimes } 160