[apple/network_cmds.git] / talkd.tproj / announce.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)announce.c	8.3 (Berkeley) 1/7/94";
#endif /* not lint */

#include <sys/types.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <protocols/talkd.h>
#include <sgtty.h>
#include <errno.h>
#include <syslog.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include <vis.h>
#include "talkd.h"

extern char hostname[];

int print_mesg __P((char *tty, CTL_MSG *request, char *remote_machine));

/*
 * Announce an invitation to talk.
 */
	
/*
 * See if the user is accepting messages. If so, announce that 
 * a talk is requested.
 */
int
announce(request, remote_machine)
	CTL_MSG *request;
	char *remote_machine;
{
	char full_tty[32];
	struct stat stbuf;

	(void)snprintf(full_tty, sizeof(full_tty),
	    "%s%s", _PATH_DEV, request->r_tty);
	if (stat(full_tty, &stbuf) < 0 || (stbuf.st_mode&020) == 0)
		return (PERMISSION_DENIED);
	return (print_mesg(request->r_tty, request, remote_machine));
}

#define max(a,b) ( (a) > (b) ? (a) : (b) )
#define N_LINES 5
#define N_CHARS 256

/*
 * Build a block of characters containing the message. 
 * It is sent blank filled and in a single block to
 * try to keep the message in one piece if the recipient
 * in in vi at the time
 */
int
print_mesg(tty, request, remote_machine)
	char *tty;
	CTL_MSG *request;
	char *remote_machine;
{
	struct timeval clock;
	struct timezone zone;
	struct tm *localtime();
	struct tm *localclock;
	struct iovec iovec;
	char line_buf[N_LINES][N_CHARS];
	int sizes[N_LINES];
	char big_buf[N_LINES*N_CHARS];
	char *bptr, *lptr, *vis_user;
	int i, j, max_size;

	i = 0;
	max_size = 0;
	gettimeofday(&clock, &zone);
	localclock = localtime( &clock.tv_sec );
	(void)snprintf(line_buf[i], N_CHARS, " ");
	sizes[i] = strlen(line_buf[i]);
	max_size = max(max_size, sizes[i]);
	i++;
	(void)snprintf(line_buf[i], N_CHARS,
		"Message from Talk_Daemon@%s at %d:%02d ...",
		hostname, localclock->tm_hour , localclock->tm_min );
	sizes[i] = strlen(line_buf[i]);
	max_size = max(max_size, sizes[i]);
	i++;

	vis_user = malloc(strlen(request->l_name) * 4 + 1);
	strvis(vis_user, request->l_name, VIS_CSTYLE);
	(void)snprintf(line_buf[i], N_CHARS,
	"talk: connection requested by %s@%s", vis_user, remote_machine);
	sizes[i] = strlen(line_buf[i]);
	max_size = max(max_size, sizes[i]);
	i++;
	(void)snprintf(line_buf[i], N_CHARS, "talk: respond with:  talk %s@%s",
	vis_user, remote_machine);
	sizes[i] = strlen(line_buf[i]);
	max_size = max(max_size, sizes[i]);
	i++;
	(void)snprintf(line_buf[i], N_CHARS, " ");
	sizes[i] = strlen(line_buf[i]);
	max_size = max(max_size, sizes[i]);
	i++;
	bptr = big_buf;
	*bptr++ = '\a'; /* send something to wake them up */
	*bptr++ = '\r';	/* add a \r in case of raw mode */
	*bptr++ = '\n';
	for (i = 0; i < N_LINES; i++) {
		/* copy the line into the big buffer */
		lptr = line_buf[i];
		while (*lptr != '\0')
			*(bptr++) = *(lptr++);
		/* pad out the rest of the lines with blanks */
		for (j = sizes[i]; j < max_size + 2; j++)
			*(bptr++) = ' ';
		*(bptr++) = '\r';	/* add a \r in case of raw mode */
		*(bptr++) = '\n';
	}
	*bptr = '\0';
	iovec.iov_base = big_buf;
	iovec.iov_len = bptr - big_buf;
	/*
	 * we choose a timeout of RING_WAIT-5 seconds so that we don't
	 * stack up processes trying to write messages to a tty
	 * that is permanently blocked.
	 */
	if (ttymsg(&iovec, 1, tty, RING_WAIT - 5) != NULL)
		return (FAILED);

	return (SUCCESS);
}
Commit	Line	Data
b7080c8e A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
921c0aec A	6	* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.0 (the 'License'). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
b7080c8e A	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
921c0aec A	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License."
b7080c8e A	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Copyright (c) 1983, 1993
	26	* The Regents of the University of California. All rights reserved.
	27	*
	28	* Redistribution and use in source and binary forms, with or without
	29	* modification, are permitted provided that the following conditions
	30	* are met:
	31	* 1. Redistributions of source code must retain the above copyright
	32	* notice, this list of conditions and the following disclaimer.
	33	* 2. Redistributions in binary form must reproduce the above copyright
	34	* notice, this list of conditions and the following disclaimer in the
	35	* documentation and/or other materials provided with the distribution.
	36	* 3. All advertising materials mentioning features or use of this software
	37	* must display the following acknowledgement:
	38	* This product includes software developed by the University of
	39	* California, Berkeley and its contributors.
	40	* 4. Neither the name of the University nor the names of its contributors
	41	* may be used to endorse or promote products derived from this software
	42	* without specific prior written permission.
	43	*
	44	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	45	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	46	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	47	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	48	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	49	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	50	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	51	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	52	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	53	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	54	* SUCH DAMAGE.
	55	*/
	56
	57	#ifndef lint
	58	static char sccsid[] = "@(#)announce.c 8.3 (Berkeley) 1/7/94";
	59	#endif /* not lint */
	60
	61	#include <sys/types.h>
	62	#include <sys/uio.h>
	63	#include <sys/stat.h>
	64	#include <sys/time.h>
	65	#include <sys/wait.h>
	66	#include <sys/socket.h>
	67	#include <protocols/talkd.h>
	68	#include <sgtty.h>
	69	#include <errno.h>
	70	#include <syslog.h>
	71	#include <unistd.h>
	72	#include <stdio.h>
	73	#include <stdlib.h>
	74	#include <string.h>
	75	#include <paths.h>
	76	#include <vis.h>
	77	#include "talkd.h"
	78
	79	extern char hostname[];
	80
	81	int print_mesg __P((char tty, CTL_MSG request, char *remote_machine));
	82
	83	/*
	84	* Announce an invitation to talk.
85	*/
86
87	/*
88	* See if the user is accepting messages. If so, announce that
89	* a talk is requested.
90	*/
91	int
92	announce(request, remote_machine)
93	CTL_MSG *request;
94	char *remote_machine;
95	{
96	char full_tty[32];
97	struct stat stbuf;
98
99	(void)snprintf(full_tty, sizeof(full_tty),
100	"%s%s", _PATH_DEV, request->r_tty);
101	if (stat(full_tty, &stbuf) < 0 \|\| (stbuf.st_mode&020) == 0)
102	return (PERMISSION_DENIED);
103	return (print_mesg(request->r_tty, request, remote_machine));
104	}
105
106	#define max(a,b) ( (a) > (b) ? (a) : (b) )
107	#define N_LINES 5
108	#define N_CHARS 256
109
110	/*
111	* Build a block of characters containing the message.
112	* It is sent blank filled and in a single block to
113	* try to keep the message in one piece if the recipient
114	* in in vi at the time
115	*/
116	int
117	print_mesg(tty, request, remote_machine)
118	char *tty;
119	CTL_MSG *request;
120	char *remote_machine;
121	{
122	struct timeval clock;
123	struct timezone zone;
124	struct tm *localtime();
125	struct tm *localclock;
126	struct iovec iovec;
127	char line_buf[N_LINES][N_CHARS];
128	int sizes[N_LINES];
129	char big_buf[N_LINES*N_CHARS];
130	char bptr, lptr, *vis_user;
131	int i, j, max_size;
132
133	i = 0;
134	max_size = 0;
135	gettimeofday(&clock, &zone);
136	localclock = localtime( &clock.tv_sec );
137	(void)snprintf(line_buf[i], N_CHARS, " ");
138	sizes[i] = strlen(line_buf[i]);
139	max_size = max(max_size, sizes[i]);
140	i++;
141	(void)snprintf(line_buf[i], N_CHARS,
142	"Message from Talk_Daemon@%s at %d:%02d ...",
143	hostname, localclock->tm_hour , localclock->tm_min );
144	sizes[i] = strlen(line_buf[i]);
145	max_size = max(max_size, sizes[i]);
146	i++;
147
148	vis_user = malloc(strlen(request->l_name) * 4 + 1);
149	strvis(vis_user, request->l_name, VIS_CSTYLE);
150	(void)snprintf(line_buf[i], N_CHARS,
151	"talk: connection requested by %s@%s", vis_user, remote_machine);
152	sizes[i] = strlen(line_buf[i]);
153	max_size = max(max_size, sizes[i]);
154	i++;
155	(void)snprintf(line_buf[i], N_CHARS, "talk: respond with: talk %s@%s",
156	vis_user, remote_machine);
157	sizes[i] = strlen(line_buf[i]);
158	max_size = max(max_size, sizes[i]);
159	i++;
160	(void)snprintf(line_buf[i], N_CHARS, " ");
161	sizes[i] = strlen(line_buf[i]);
162	max_size = max(max_size, sizes[i]);
163	i++;
164	bptr = big_buf;
165	bptr++ = '\a'; / send something to wake them up */
166	bptr++ = '\r'; / add a \r in case of raw mode */
167	*bptr++ = '\n';
168	for (i = 0; i < N_LINES; i++) {
169	/* copy the line into the big buffer */
170	lptr = line_buf[i];
171	while (*lptr != '\0')
172	(bptr++) = (lptr++);
173	/* pad out the rest of the lines with blanks */
174	for (j = sizes[i]; j < max_size + 2; j++)
175	*(bptr++) = ' ';
176	(bptr++) = '\r'; / add a \r in case of raw mode */
177	*(bptr++) = '\n';
178	}
179	*bptr = '\0';
180	iovec.iov_base = big_buf;
181	iovec.iov_len = bptr - big_buf;
182	/*
183	* we choose a timeout of RING_WAIT-5 seconds so that we don't
184	* stack up processes trying to write messages to a tty
185	* that is permanently blocked.
186	*/
187	if (ttymsg(&iovec, 1, tty, RING_WAIT - 5) != NULL)
188	return (FAILED);
189
190	return (SUCCESS);
191	}