2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
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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.
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13 * 3. Neither the name of the University nor the names of its contributors
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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29 * @(#)get_names.c 8.1 (Berkeley) 6/6/93
30 * $FreeBSD: src/usr.bin/talk/get_names.c,v 1.6.2.1 2001/07/30 10:31:29 dd Exp $
37 #include <sys/param.h>
45 fprintf(stderr, "usage: talk person [ttyname]\n");
50 * Determine the local and remote user, tty, and machines
53 get_names(int argc, char **argv)
55 char hostname[MAXHOSTNAMELEN];
56 char *his_name, *my_name;
57 char *my_machine_name, *his_machine_name;
64 errx(1, "standard input must be a tty, not a pipe or a file");
65 if ((my_name = getlogin()) == NULL) {
68 if ((pw = getpwuid(getuid())) == NULL)
69 errx(1, "you don't exist. Go away");
70 my_name = pw->pw_name;
72 gethostname(hostname, sizeof (hostname));
73 my_machine_name = hostname;
74 /* check for, and strip out, the machine name of the target */
75 for (cp = argv[1]; *cp && !strchr("@:!", *cp); cp++)
78 /* this is a local to local talk */
80 his_machine_name = my_machine_name;
85 his_machine_name = cp;
87 /* host!user or host:user */
89 his_machine_name = argv[1];
94 his_tty = argv[2]; /* tty name is arg 2 */
97 get_addrs(my_machine_name, his_machine_name);
99 * Initialize the message template.
101 msg.vers = TALK_VERSION;
102 msg.addr.sa_family = htons(AF_INET);
103 msg.ctl_addr.sa_family = htons(AF_INET);
104 msg.id_num = htonl(0);
105 strncpy(msg.l_name, my_name, NAME_SIZE);
106 msg.l_name[NAME_SIZE - 1] = '\0';
107 strncpy(msg.r_name, his_name, NAME_SIZE);
108 msg.r_name[NAME_SIZE - 1] = '\0';
109 strncpy(msg.r_tty, his_tty, TTY_SIZE);
110 msg.r_tty[TTY_SIZE - 1] = '\0';