2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)get_names.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/talk/get_names.c,v 1.6.2.1 2001/07/30 10:31:29 dd Exp $
35 * $DragonFly: src/usr.bin/talk/get_names.c,v 1.2 2003/06/17 04:29:32 dillon Exp $
42 #include <sys/param.h>
50 fprintf(stderr, "usage: talk person [ttyname]\n");
55 * Determine the local and remote user, tty, and machines
62 char hostname[MAXHOSTNAMELEN];
63 char *his_name, *my_name;
64 char *my_machine_name, *his_machine_name;
65 char *my_tty, *his_tty;
71 errx(1, "standard input must be a tty, not a pipe or a file");
72 if ((my_name = getlogin()) == NULL) {
75 if ((pw = getpwuid(getuid())) == NULL)
76 errx(1, "you don't exist. Go away");
77 my_name = pw->pw_name;
79 gethostname(hostname, sizeof (hostname));
80 my_machine_name = hostname;
81 /* check for, and strip out, the machine name of the target */
82 for (cp = argv[1]; *cp && !index("@:!", *cp); cp++)
85 /* this is a local to local talk */
87 his_machine_name = my_machine_name;
92 his_machine_name = cp;
94 /* host!user or host:user */
96 his_machine_name = argv[1];
101 his_tty = argv[2]; /* tty name is arg 2 */
104 get_addrs(my_machine_name, his_machine_name);
106 * Initialize the message template.
108 msg.vers = TALK_VERSION;
109 msg.addr.sa_family = htons(AF_INET);
110 msg.ctl_addr.sa_family = htons(AF_INET);
111 msg.id_num = htonl(0);
112 strncpy(msg.l_name, my_name, NAME_SIZE);
113 msg.l_name[NAME_SIZE - 1] = '\0';
114 strncpy(msg.r_name, his_name, NAME_SIZE);
115 msg.r_name[NAME_SIZE - 1] = '\0';
116 strncpy(msg.r_tty, his_tty, TTY_SIZE);
117 msg.r_tty[TTY_SIZE - 1] = '\0';