* Copyright (c) 1983 Regents of the University of California.
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
static char sccsid
[] = "@(#)announce.c 5.8 (Berkeley) 6/1/90";
#include <protocols/talkd.h>
* Announce an invitation to talk.
* Because the tty driver insists on attaching a terminal-less
* process to any terminal that it writes on, we must fork a child
announce(request
, remote_machine
)
/* we are the parent, so wait for the child */
if (pid
== -1) /* the fork failed */
syslog(LOG_WARNING
, "announce: wait: %m");
if (status
&0377 > 0) /* we were killed by some signal */
/* Get the second byte, this is the exit/return code */
return ((status
>> 8) & 0377);
/* we are the child, go and do it */
_exit(announce_proc(request
, remote_machine
));
* See if the user is accepting messages. If so, announce that
announce_proc(request
, remote_machine
)
(void)sprintf(full_tty
, "%s/%s", _PATH_DEV
, request
->r_tty
);
if (access(full_tty
, 0) != 0)
if ((tf
= fopen(full_tty
, "w")) == NULL
)
return (PERMISSION_DENIED
);
* On first tty open, the server will have
* it's pgrp set, so disconnect us from the
* tty before we catch a signal.
ioctl(fileno(tf
), TIOCNOTTY
, (struct sgttyb
*) 0);
if (fstat(fileno(tf
), &stbuf
) < 0)
return (PERMISSION_DENIED
);
if ((stbuf
.st_mode
&020) == 0)
return (PERMISSION_DENIED
);
print_mesg(tf
, request
, remote_machine
);
#define max(a,b) ( (a) > (b) ? (a) : (b) )
* 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
print_mesg(tf
, request
, remote_machine
)
char line_buf
[N_LINES
][N_CHARS
];
char big_buf
[N_LINES
*N_CHARS
];
gettimeofday(&clock
, &zone
);
localclock
= localtime( &clock
.tv_sec
);
(void)sprintf(line_buf
[i
], " ");
sizes
[i
] = strlen(line_buf
[i
]);
max_size
= max(max_size
, sizes
[i
]);
(void)sprintf(line_buf
[i
], "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
]);
(void)sprintf(line_buf
[i
], "talk: connection requested by %s@%s.",
request
->l_name
, remote_machine
);
sizes
[i
] = strlen(line_buf
[i
]);
max_size
= max(max_size
, sizes
[i
]);
(void)sprintf(line_buf
[i
], "talk: respond with: talk %s@%s",
request
->l_name
, remote_machine
);
sizes
[i
] = strlen(line_buf
[i
]);
max_size
= max(max_size
, sizes
[i
]);
(void)sprintf(line_buf
[i
], " ");
sizes
[i
] = strlen(line_buf
[i
]);
max_size
= max(max_size
, sizes
[i
]);
*bptr
++ = '\a'; /* send something to wake them up */
*bptr
++ = '\r'; /* add a \r in case of raw mode */
for (i
= 0; i
< N_LINES
; i
++) {
/* copy the line into the big buffer */
/* pad out the rest of the lines with blanks */
for (j
= sizes
[i
]; j
< max_size
+ 2; j
++)
*(bptr
++) = '\r'; /* add a \r in case of raw mode */
ioctl(fileno(tf
), TIOCNOTTY
, (struct sgttyb
*) 0);