mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
285926046a
remote peer will be connected through. This avoids the ``Checking for invitation on caller's machine'' problem for multi-homed hosts. Thanks to: Garrett, for his `find_interface' example
117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
/*
|
|
* 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
|
|
static char sccsid[] = "@(#)get_names.c 8.1 (Berkeley) 6/6/93";
|
|
#endif /* not lint */
|
|
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <sys/param.h>
|
|
#include <pwd.h>
|
|
#include "talk.h"
|
|
|
|
extern CTL_MSG msg;
|
|
|
|
/*
|
|
* Determine the local and remote user, tty, and machines
|
|
*/
|
|
void
|
|
get_names(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
char hostname[MAXHOSTNAMELEN];
|
|
char *his_name, *my_name;
|
|
char *my_machine_name, *his_machine_name;
|
|
char *my_tty, *his_tty;
|
|
register char *cp;
|
|
|
|
if (argc < 2 ) {
|
|
printf("Usage: talk user [ttyname]\n");
|
|
exit(-1);
|
|
}
|
|
if (!isatty(0)) {
|
|
printf("Standard input must be a tty, not a pipe or a file\n");
|
|
exit(-1);
|
|
}
|
|
if ((my_name = getlogin()) == NULL) {
|
|
struct passwd *pw;
|
|
|
|
if ((pw = getpwuid(getuid())) == NULL) {
|
|
printf("You don't exist. Go away.\n");
|
|
exit(-1);
|
|
}
|
|
my_name = pw->pw_name;
|
|
}
|
|
gethostname(hostname, sizeof (hostname));
|
|
my_machine_name = hostname;
|
|
/* check for, and strip out, the machine name of the target */
|
|
for (cp = argv[1]; *cp && !index("@:!", *cp); cp++)
|
|
;
|
|
if (*cp == '\0') {
|
|
/* this is a local to local talk */
|
|
his_name = argv[1];
|
|
his_machine_name = my_machine_name;
|
|
} else {
|
|
if (*cp++ == '@') {
|
|
/* user@host */
|
|
his_name = argv[1];
|
|
his_machine_name = cp;
|
|
} else {
|
|
/* host!user or host:user */
|
|
his_name = cp;
|
|
his_machine_name = argv[1];
|
|
}
|
|
*--cp = '\0';
|
|
}
|
|
if (argc > 2)
|
|
his_tty = argv[2]; /* tty name is arg 2 */
|
|
else
|
|
his_tty = "";
|
|
get_addrs(my_machine_name, his_machine_name);
|
|
/*
|
|
* Initialize the message template.
|
|
*/
|
|
msg.vers = TALK_VERSION;
|
|
msg.addr.sa_family = htons(AF_INET);
|
|
msg.ctl_addr.sa_family = htons(AF_INET);
|
|
msg.id_num = htonl(0);
|
|
strncpy(msg.l_name, my_name, NAME_SIZE);
|
|
msg.l_name[NAME_SIZE - 1] = '\0';
|
|
strncpy(msg.r_name, his_name, NAME_SIZE);
|
|
msg.r_name[NAME_SIZE - 1] = '\0';
|
|
strncpy(msg.r_tty, his_tty, TTY_SIZE);
|
|
msg.r_tty[TTY_SIZE - 1] = '\0';
|
|
}
|