GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: libexec/talkd/announce.c Lines: 0 56 0.0 %
Date: 2017-11-13 Branches: 0 26 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: announce.c,v 1.24 2016/02/01 07:25:51 mestre Exp $	*/
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/*
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 * Copyright (c) 1983 Regents of the University of California.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/stat.h>
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#include <protocols/talkd.h>
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#include <limits.h>
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#include <paths.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "talkd.h"
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static void	print_mesg(FILE *,CTL_MSG *,char *);
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/*
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 * Announce an invitation to talk.  If the user is
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 * accepting messages, announce that a talk is requested.
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 */
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int
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announce(CTL_MSG *request, char *remote_machine)
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{
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	char full_tty[PATH_MAX];
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	FILE *tf;
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	struct stat stbuf;
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	(void)snprintf(full_tty, sizeof(full_tty), "%s/%s", _PATH_DEV,
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	    request->r_tty);
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	if (access(full_tty, 0) != 0)
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		return (FAILED);
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	if ((tf = fopen(full_tty, "w")) == NULL)
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		return (PERMISSION_DENIED);
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	if (fstat(fileno(tf), &stbuf) < 0) {
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		fclose(tf);
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		return (PERMISSION_DENIED);
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	}
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	if ((stbuf.st_mode & S_IWGRP) == 0) {
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		fclose(tf);
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		return (PERMISSION_DENIED);
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	}
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	print_mesg(tf, request, remote_machine);
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	fclose(tf);
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	return (SUCCESS);
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}
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#define max(a,b) ( (a) > (b) ? (a) : (b) )
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#define N_LINES 5
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#define N_CHARS 120
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/*
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 * Build a block of characters containing the message.
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 * It is sent blank filled and in a single block to
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 * try to keep the message in one piece if the recipient
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 * is in vi at the time
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 */
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static void
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print_mesg(FILE *tf, CTL_MSG *request, char *remote_machine)
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{
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	time_t clocktime;
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	struct tm *localclock;
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	char line_buf[N_LINES][N_CHARS];
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	int sizes[N_LINES];
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	char big_buf[(N_LINES + 1) * N_CHARS];
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	char *bptr, *lptr, vis_user[sizeof(request->l_name) * 4];
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	int i, j, max_size;
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	i = 0;
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	max_size = 0;
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	time(&clocktime);
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	localclock = localtime(&clocktime);
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	(void)snprintf(line_buf[i], N_CHARS, " ");
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	sizes[i] = strlen(line_buf[i]);
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	max_size = max(max_size, sizes[i]);
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	i++;
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	(void)snprintf(line_buf[i], N_CHARS,
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	    "Message from Talk_Daemon@%s at %d:%02d ...",
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	    hostname, localclock->tm_hour , localclock->tm_min );
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	sizes[i] = strlen(line_buf[i]);
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	max_size = max(max_size, sizes[i]);
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	i++;
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	strvis(vis_user, request->l_name, VIS_CSTYLE);
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	(void)snprintf(line_buf[i], N_CHARS,
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	    "talk: connection requested by %s@%s.",
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	    vis_user, remote_machine);
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	sizes[i] = strlen(line_buf[i]);
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	max_size = max(max_size, sizes[i]);
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	i++;
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	(void)snprintf(line_buf[i], N_CHARS, "talk: respond with:  talk %s@%s",
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	    vis_user, remote_machine);
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	sizes[i] = strlen(line_buf[i]);
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	max_size = max(max_size, sizes[i]);
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	i++;
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	(void)snprintf(line_buf[i], N_CHARS, " ");
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	sizes[i] = strlen(line_buf[i]);
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	max_size = max(max_size, sizes[i]);
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	i++;
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	bptr = big_buf;
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	*bptr++ = '\007'; /* send something to wake them up */
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	*bptr++ = '\r';	/* add a \r in case of raw mode */
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	*bptr++ = '\n';
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	for (i = 0; i < N_LINES; i++) {
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		/* copy the line into the big buffer */
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		lptr = line_buf[i];
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		while (*lptr != '\0')
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			*(bptr++) = *(lptr++);
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		/* pad out the rest of the lines with blanks */
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		for (j = sizes[i]; j < max_size + 2; j++)
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			*(bptr++) = ' ';
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		*(bptr++) = '\r';	/* add a \r in case of raw mode */
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		*(bptr++) = '\n';
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	}
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	*bptr = '\0';
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	fprintf(tf, "%s", big_buf);
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	fflush(tf);
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}