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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2017 Gary Mills
* Copyright 1997 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#include "talk.h"
#include "ctl.h"
#include <locale.h>
#include <pwd.h>
#include <sys/systeminfo.h>
char *getlogin(), *ttyname(int);
extern CTL_MSG msg;
/*
* Determine the local and remote user, tty, and machines
*/
struct hostent *gethostbyname();
void
get_names(argc, argv)
int argc;
char *argv[];
{
char hostname[HOST_NAME_LENGTH + 1];
char *rem_name;
char *my_name;
char *my_machine_name;
char *rem_machine_name;
char *rem_tty;
char *ptr;
int name_length;
if (argc < 2) {
fprintf(stderr,
"Usage: talk %s\n", gettext("address [terminal]"));
exit(1);
}
if (!isatty(0)) {
fprintf(stderr,
gettext("Standard input must be a tty, not a pipe or a file\n"));
exit(1);
}
if (!isatty(1)) {
fprintf(stderr,
gettext("Standard output must be a tty, not a pipe or a file\n"));
exit(1);
}
if ((my_name = getlogin()) == NULL) {
struct passwd *pass = getpwuid(getuid());
if (pass != NULL)
my_name = pass->pw_name;
}
if (my_name == NULL) {
fprintf(stderr,
gettext("Who are you? You have no entry in /etc/utmp! Aborting..\n"));
exit(1);
}
name_length = HOST_NAME_LENGTH;
(void) sysinfo(SI_HOSTNAME, hostname, name_length);
my_machine_name = hostname;
/*
* check for, and strip out, the machine name of the target
*/
for (ptr = argv[1]; *ptr != '\0' &&
*ptr != '@' &&
*ptr != ':' &&
*ptr != '!' &&
*ptr != '.'; ptr++) {
}
if (*ptr == '\0') {
/* this is a local to local talk */
rem_name = argv[1];
rem_machine_name = my_machine_name;
} else {
if (*ptr == '@') {
/* user@host */
rem_name = argv[1];
rem_machine_name = ptr + 1;
} else {
/* host.user or host!user or host:user */
rem_name = ptr + 1;
rem_machine_name = argv[1];
}
*ptr = '\0';
}
if (argc > 2) {
rem_tty = argv[2]; /* tty name is arg 2 */
} else {
rem_tty = "";
}
get_addrs(my_machine_name, rem_machine_name);
/* Load these useful values into the standard message header */
msg.id_num = 0;
strncpy(msg.l_name, my_name, NAME_SIZE);
msg.l_name[NAME_SIZE - 1] = '\0';
strncpy(msg.r_name, rem_name, NAME_SIZE);
msg.r_name[NAME_SIZE - 1] = '\0';
strncpy(msg.r_tty, rem_tty, TTY_SIZE);
msg.r_tty[TTY_SIZE - 1] = '\0';
}
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