1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate *
4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate * with the License.
8*7c478bd9Sstevel@tonic-gate *
9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate *
14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate *
20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate */
26*7c478bd9Sstevel@tonic-gate
27*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */
29*7c478bd9Sstevel@tonic-gate
30*7c478bd9Sstevel@tonic-gate /*
31*7c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988
32*7c478bd9Sstevel@tonic-gate * The Regents of the University of California
33*7c478bd9Sstevel@tonic-gate * All Rights Reserved
34*7c478bd9Sstevel@tonic-gate *
35*7c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from
36*7c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its
37*7c478bd9Sstevel@tonic-gate * contributors.
38*7c478bd9Sstevel@tonic-gate */
39*7c478bd9Sstevel@tonic-gate
40*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
41*7c478bd9Sstevel@tonic-gate
42*7c478bd9Sstevel@tonic-gate #include "talk.h"
43*7c478bd9Sstevel@tonic-gate #include "ctl.h"
44*7c478bd9Sstevel@tonic-gate #include <locale.h>
45*7c478bd9Sstevel@tonic-gate #include <pwd.h>
46*7c478bd9Sstevel@tonic-gate #include <sys/systeminfo.h>
47*7c478bd9Sstevel@tonic-gate
48*7c478bd9Sstevel@tonic-gate char *getlogin(), *ttyname(int);
49*7c478bd9Sstevel@tonic-gate
50*7c478bd9Sstevel@tonic-gate extern CTL_MSG msg;
51*7c478bd9Sstevel@tonic-gate
52*7c478bd9Sstevel@tonic-gate /*
53*7c478bd9Sstevel@tonic-gate * Determine the local and remote user, tty, and machines
54*7c478bd9Sstevel@tonic-gate */
55*7c478bd9Sstevel@tonic-gate
56*7c478bd9Sstevel@tonic-gate struct hostent *gethostbyname();
57*7c478bd9Sstevel@tonic-gate
58*7c478bd9Sstevel@tonic-gate void
get_names(argc,argv)59*7c478bd9Sstevel@tonic-gate get_names(argc, argv)
60*7c478bd9Sstevel@tonic-gate int argc;
61*7c478bd9Sstevel@tonic-gate char *argv[];
62*7c478bd9Sstevel@tonic-gate {
63*7c478bd9Sstevel@tonic-gate char hostname[HOST_NAME_LENGTH + 1];
64*7c478bd9Sstevel@tonic-gate char *rem_name;
65*7c478bd9Sstevel@tonic-gate char *my_name;
66*7c478bd9Sstevel@tonic-gate char *my_machine_name;
67*7c478bd9Sstevel@tonic-gate char *rem_machine_name;
68*7c478bd9Sstevel@tonic-gate char *my_tty;
69*7c478bd9Sstevel@tonic-gate char *rem_tty;
70*7c478bd9Sstevel@tonic-gate char *ptr;
71*7c478bd9Sstevel@tonic-gate int name_length;
72*7c478bd9Sstevel@tonic-gate
73*7c478bd9Sstevel@tonic-gate if (argc < 2) {
74*7c478bd9Sstevel@tonic-gate fprintf(stderr,
75*7c478bd9Sstevel@tonic-gate "Usage: talk %s\n", gettext("address [terminal]"));
76*7c478bd9Sstevel@tonic-gate exit(1);
77*7c478bd9Sstevel@tonic-gate }
78*7c478bd9Sstevel@tonic-gate if (!isatty(0)) {
79*7c478bd9Sstevel@tonic-gate fprintf(stderr,
80*7c478bd9Sstevel@tonic-gate gettext("Standard input must be a tty, not a pipe or a file\n"));
81*7c478bd9Sstevel@tonic-gate exit(1);
82*7c478bd9Sstevel@tonic-gate }
83*7c478bd9Sstevel@tonic-gate
84*7c478bd9Sstevel@tonic-gate if (!isatty(1)) {
85*7c478bd9Sstevel@tonic-gate fprintf(stderr,
86*7c478bd9Sstevel@tonic-gate gettext("Standard output must be a tty, not a pipe or a file\n"));
87*7c478bd9Sstevel@tonic-gate exit(1);
88*7c478bd9Sstevel@tonic-gate }
89*7c478bd9Sstevel@tonic-gate
90*7c478bd9Sstevel@tonic-gate if ((my_name = getlogin()) == NULL) {
91*7c478bd9Sstevel@tonic-gate struct passwd *pass = getpwuid(getuid());
92*7c478bd9Sstevel@tonic-gate if (pass != NULL)
93*7c478bd9Sstevel@tonic-gate my_name = pass->pw_name;
94*7c478bd9Sstevel@tonic-gate }
95*7c478bd9Sstevel@tonic-gate if (my_name == NULL) {
96*7c478bd9Sstevel@tonic-gate fprintf(stderr,
97*7c478bd9Sstevel@tonic-gate gettext("Who are you? You have no entry in /etc/utmp! Aborting..\n"));
98*7c478bd9Sstevel@tonic-gate exit(1);
99*7c478bd9Sstevel@tonic-gate }
100*7c478bd9Sstevel@tonic-gate
101*7c478bd9Sstevel@tonic-gate name_length = HOST_NAME_LENGTH;
102*7c478bd9Sstevel@tonic-gate (void) sysinfo(SI_HOSTNAME, hostname, name_length);
103*7c478bd9Sstevel@tonic-gate my_machine_name = hostname;
104*7c478bd9Sstevel@tonic-gate
105*7c478bd9Sstevel@tonic-gate my_tty = strrchr(ttyname(0), '/') + 1;
106*7c478bd9Sstevel@tonic-gate
107*7c478bd9Sstevel@tonic-gate /*
108*7c478bd9Sstevel@tonic-gate * check for, and strip out, the machine name of the target
109*7c478bd9Sstevel@tonic-gate */
110*7c478bd9Sstevel@tonic-gate
111*7c478bd9Sstevel@tonic-gate for (ptr = argv[1]; *ptr != '\0' &&
112*7c478bd9Sstevel@tonic-gate *ptr != '@' &&
113*7c478bd9Sstevel@tonic-gate *ptr != ':' &&
114*7c478bd9Sstevel@tonic-gate *ptr != '!' &&
115*7c478bd9Sstevel@tonic-gate *ptr != '.'; ptr++) {
116*7c478bd9Sstevel@tonic-gate }
117*7c478bd9Sstevel@tonic-gate
118*7c478bd9Sstevel@tonic-gate if (*ptr == '\0') {
119*7c478bd9Sstevel@tonic-gate
120*7c478bd9Sstevel@tonic-gate /* this is a local to local talk */
121*7c478bd9Sstevel@tonic-gate
122*7c478bd9Sstevel@tonic-gate rem_name = argv[1];
123*7c478bd9Sstevel@tonic-gate rem_machine_name = my_machine_name;
124*7c478bd9Sstevel@tonic-gate
125*7c478bd9Sstevel@tonic-gate } else {
126*7c478bd9Sstevel@tonic-gate
127*7c478bd9Sstevel@tonic-gate if (*ptr == '@') {
128*7c478bd9Sstevel@tonic-gate /* user@host */
129*7c478bd9Sstevel@tonic-gate rem_name = argv[1];
130*7c478bd9Sstevel@tonic-gate rem_machine_name = ptr + 1;
131*7c478bd9Sstevel@tonic-gate } else {
132*7c478bd9Sstevel@tonic-gate /* host.user or host!user or host:user */
133*7c478bd9Sstevel@tonic-gate rem_name = ptr + 1;
134*7c478bd9Sstevel@tonic-gate rem_machine_name = argv[1];
135*7c478bd9Sstevel@tonic-gate }
136*7c478bd9Sstevel@tonic-gate *ptr = '\0';
137*7c478bd9Sstevel@tonic-gate }
138*7c478bd9Sstevel@tonic-gate
139*7c478bd9Sstevel@tonic-gate
140*7c478bd9Sstevel@tonic-gate if (argc > 2) {
141*7c478bd9Sstevel@tonic-gate rem_tty = argv[2]; /* tty name is arg 2 */
142*7c478bd9Sstevel@tonic-gate } else {
143*7c478bd9Sstevel@tonic-gate rem_tty = "";
144*7c478bd9Sstevel@tonic-gate }
145*7c478bd9Sstevel@tonic-gate
146*7c478bd9Sstevel@tonic-gate get_addrs(my_machine_name, rem_machine_name);
147*7c478bd9Sstevel@tonic-gate
148*7c478bd9Sstevel@tonic-gate /* Load these useful values into the standard message header */
149*7c478bd9Sstevel@tonic-gate
150*7c478bd9Sstevel@tonic-gate msg.id_num = 0;
151*7c478bd9Sstevel@tonic-gate
152*7c478bd9Sstevel@tonic-gate strncpy(msg.l_name, my_name, NAME_SIZE);
153*7c478bd9Sstevel@tonic-gate msg.l_name[NAME_SIZE - 1] = '\0';
154*7c478bd9Sstevel@tonic-gate
155*7c478bd9Sstevel@tonic-gate strncpy(msg.r_name, rem_name, NAME_SIZE);
156*7c478bd9Sstevel@tonic-gate msg.r_name[NAME_SIZE - 1] = '\0';
157*7c478bd9Sstevel@tonic-gate
158*7c478bd9Sstevel@tonic-gate strncpy(msg.r_tty, rem_tty, TTY_SIZE);
159*7c478bd9Sstevel@tonic-gate msg.r_tty[TTY_SIZE - 1] = '\0';
160*7c478bd9Sstevel@tonic-gate }
161