diff options
Diffstat (limited to 'remote_cmds/talkd.tproj/talkd.c')
| -rw-r--r-- | remote_cmds/talkd.tproj/talkd.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/remote_cmds/talkd.tproj/talkd.c b/remote_cmds/talkd.tproj/talkd.c new file mode 100644 index 0000000..1f28cb8 --- /dev/null +++ b/remote_cmds/talkd.tproj/talkd.c @@ -0,0 +1,145 @@ +/* + * 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 +__attribute__((__used__)) +static const char copyright[] = +"@(#) Copyright (c) 1983, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)talkd.c 8.1 (Berkeley) 6/4/93"; +#endif +__attribute__((__used__)) +static const char rcsid[] = + "$FreeBSD: src/libexec/talkd/talkd.c,v 1.17 2004/06/14 22:44:13 bms Exp $"; +#endif /* not lint */ + +#include <sys/cdefs.h> + +/* + * 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 <netinet/in.h> +#include <protocols/talkd.h> +#include <err.h> +#include <errno.h> +#include <paths.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <time.h> +#include <unistd.h> + +#include "extern.h" + +CTL_MSG request; +CTL_RESPONSE response; + +int debug = 0; +long lastmsgtime; + +char hostname[MAXHOSTNAMELEN + 1]; + +#define TIMEOUT 30 +#define MAXIDLE 120 + +int +main(int argc, char *argv[]) +{ + register CTL_MSG *mp = &request; + int cc; + struct sockaddr ctl_addr; + + /* + * removed so ntalkd can run in tty sandbox + */ + if (getuid()) + errx(1, "getuid: not super-user"); + + openlog("talkd", LOG_PID, LOG_DAEMON); + if (gethostname(hostname, sizeof(hostname) - 1) < 0) { + syslog(LOG_ERR, "gethostname: %m"); + _exit(1); + } + hostname[sizeof(hostname) - 1] = '\0'; + 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 (;;) { + 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); + (void)memcpy(&ctl_addr, &mp->ctl_addr, sizeof(ctl_addr)); + ctl_addr.sa_family = ntohs(mp->ctl_addr.sa_family); + ctl_addr.sa_len = sizeof(ctl_addr); + process_request(mp, &response); + /* can block here, is this what I want? */ + cc = sendto(STDIN_FILENO, (char *)&response, + sizeof(response), 0, &ctl_addr, sizeof(ctl_addr)); + if (cc != sizeof (response)) + syslog(LOG_WARNING, "sendto: %m"); + } + /* NOTREACHED */ + return 0; +} + +void +timeout(int sig __unused) +{ + int save_errno = errno; + + if (time(0) - lastmsgtime >= MAXIDLE) + _exit(0); + alarm(TIMEOUT); + errno = save_errno; +} |