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