diff options
Diffstat (limited to 'remote_cmds/talkd.tproj/announce.c')
| -rw-r--r-- | remote_cmds/talkd.tproj/announce.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/remote_cmds/talkd.tproj/announce.c b/remote_cmds/talkd.tproj/announce.c new file mode 100644 index 0000000..5091513 --- /dev/null +++ b/remote_cmds/talkd.tproj/announce.c @@ -0,0 +1,179 @@ +/* + * 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 +#if 0 +static char sccsid[] = "@(#)announce.c 8.3 (Berkeley) 4/28/95"; +#endif +__attribute__((__used__)) +static const char rcsid[] = + "$FreeBSD: src/libexec/talkd/announce.c,v 1.16 2003/04/03 05:13:27 jmallett Exp $"; +#endif /* not lint */ + +#include <sys/cdefs.h> + +#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 <errno.h> +#include <paths.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <unistd.h> +#include <vis.h> + +#ifdef __APPLE__ +#include <util.h> +#else +#include "ttymsg.h" +#endif +#include "extern.h" + +extern char hostname[]; + +/* + * Announce an invitation to talk. + */ + +/* + * See if the user is accepting messages. If so, announce that + * a talk is requested. + */ +int +announce(CTL_MSG *request, const 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(const char *tty, CTL_MSG *request, + const char *remote_machine) +{ + struct timeval now; + time_t clock_sec; + struct timezone zone; + 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(&now, &zone); + clock_sec = now.tv_sec; + localclock = localtime(&clock_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 on %d/%.2d/%.2d ...", + hostname, localclock->tm_hour , localclock->tm_min, + localclock->tm_year + 1900, localclock->tm_mon + 1, + localclock->tm_mday); + 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++ = '\007'; /* 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); +} |