132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/*
|
|
* Copyright (c) 1983 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
|
|
char copyright[] =
|
|
"@(#) Copyright (c) 1983 Regents of the University of California.\n\
|
|
All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
/*static char sccsid[] = "from: @(#)talkd.c 5.8 (Berkeley) 2/26/91";*/
|
|
static char rcsid[] = "$Id: talkd.c,v 1.4 1997/01/29 10:30:14 explorer Exp $";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* The top level of the daemon, the format is heavily borrowed
|
|
* from rwhod.c. Basically: find out who and where you are;
|
|
* disconnect all descriptors and ttys, and then endless
|
|
* loop on waiting for and processing requests
|
|
*/
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/param.h>
|
|
|
|
#include <protocols/talkd.h>
|
|
#include <signal.h>
|
|
#include <syslog.h>
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <paths.h>
|
|
|
|
CTL_MSG request;
|
|
CTL_RESPONSE response;
|
|
|
|
int sockt;
|
|
int debug = 0;
|
|
void timeout();
|
|
long lastmsgtime;
|
|
|
|
char hostname[MAXHOSTNAMELEN + 1];
|
|
|
|
#define TIMEOUT 30
|
|
#define MAXIDLE 120
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
register CTL_MSG *mp = &request;
|
|
int cc;
|
|
|
|
if (getuid()) {
|
|
fprintf(stderr, "%s: getuid: not super-user", argv[0]);
|
|
exit(1);
|
|
}
|
|
openlog("talkd", LOG_PID, LOG_DAEMON);
|
|
if (gethostname(hostname, sizeof (hostname) - 1) < 0) {
|
|
syslog(LOG_ERR, "gethostname: %m");
|
|
_exit(1);
|
|
}
|
|
hostname[MAXHOSTNAMELEN] = 0; /* ensure null termination */
|
|
if (chdir(_PATH_DEV) < 0) {
|
|
syslog(LOG_ERR, "chdir: %s: %m", _PATH_DEV);
|
|
_exit(1);
|
|
}
|
|
if (argc > 1 && strcmp(argv[1], "-d") == 0)
|
|
debug = 1;
|
|
signal(SIGALRM, timeout);
|
|
alarm(TIMEOUT);
|
|
for (;;) {
|
|
extern int errno;
|
|
|
|
cc = recv(0, (char *)mp, sizeof (*mp), 0);
|
|
if (cc != sizeof (*mp)) {
|
|
if (cc < 0 && errno != EINTR)
|
|
syslog(LOG_WARNING, "recv: %m");
|
|
continue;
|
|
}
|
|
lastmsgtime = time(0);
|
|
process_request(mp, &response);
|
|
/* can block here, is this what I want? */
|
|
cc = sendto(sockt, (char *)&response,
|
|
sizeof (response), 0, (struct sockaddr *)&mp->ctl_addr,
|
|
sizeof (mp->ctl_addr));
|
|
if (cc != sizeof (response))
|
|
syslog(LOG_WARNING, "sendto: %m");
|
|
}
|
|
}
|
|
|
|
void
|
|
timeout()
|
|
{
|
|
|
|
if (time(0) - lastmsgtime >= MAXIDLE)
|
|
_exit(0);
|
|
alarm(TIMEOUT);
|
|
}
|