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34 static const char sccsid[] = "@(#)get_names.c 8.1 (Berkeley) 6/6/93";
37 #include <sys/param.h>
52 fprintf(stderr, "usage: talk person [ttyname]\n");
57 * Determine the local and remote user, tty, and machines
60 get_names(int argc, char *argv[])
62 char hostname[MAXHOSTNAMELEN];
63 char *his_name, *my_name;
64 const char *my_machine_name, *his_machine_name;
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 cp = argv[1] + strcspn(argv[1], "@:!");
84 /* this is a local to local talk */
86 my_machine_name = his_machine_name = "localhost";
91 his_machine_name = cp;
93 /* host!user or host:user */
95 his_machine_name = argv[1];
100 his_tty = argv[2]; /* tty name is arg 2 */
103 get_addrs(my_machine_name, his_machine_name);
105 * Initialize the message template.
107 msg.vers = TALK_VERSION;
108 msg.addr.sa_family = htons(AF_INET);
109 msg.ctl_addr.sa_family = htons(AF_INET);
110 msg.id_num = htonl(0);
111 strlcpy(msg.l_name, my_name, NAME_SIZE);
112 strlcpy(msg.r_name, his_name, NAME_SIZE);
113 strlcpy(msg.r_tty, his_tty, TTY_SIZE);