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- /*
- * Copyright (c) 1983, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)get_names.c 8.1 (Berkeley) 6/6/93";
- #endif /* not lint */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #include <sys/param.h>
- #include <sys/socket.h>
- #ifndef HAVE_OSOCKADDR
- #include <osockaddr.h>
- #endif
- #include <protocols/talkd.h>
- #include <pwd.h>
- #include "talk.h"
-
- char *getlogin();
- char *ttyname();
- char *rindex();
- extern CTL_MSG msg;
-
- /*
- * Determine the local and remote user, tty, and machines
- */
- get_names(argc, argv)
- int argc;
- char *argv[];
- {
- extern char *localhost ();
- char *his_name, *my_name;
- char *my_machine_name, *his_machine_name;
- char *my_tty, *his_tty;
- register char *cp;
-
- if (argc < 2 ) {
- printf("Usage: talk user [ttyname]\n");
- exit(-1);
- }
- if (!isatty(0)) {
- printf("Standard input must be a tty, not a pipe or a file\n");
- exit(-1);
- }
- if ((my_name = getlogin()) == NULL) {
- struct passwd *pw;
-
- if ((pw = getpwuid(getuid())) == NULL) {
- printf("You don't exist. Go away.\n");
- exit(-1);
- }
- my_name = pw->pw_name;
- }
-
- my_machine_name = localhost ();
- if (! my_machine_name) {
- perror ("Cannot get local hostname");
- exit (-1);
- }
-
- /* check for, and strip out, the machine name of the target */
- for (cp = argv[1]; *cp && !index("@:!.", *cp); cp++)
- ;
- if (*cp == '\0') {
- /* this is a local to local talk */
- his_name = argv[1];
- his_machine_name = my_machine_name;
- } else {
- if (*cp++ == '@') {
- /* user@host */
- his_name = argv[1];
- his_machine_name = cp;
- } else {
- /* host.user or host!user or host:user */
- his_name = cp;
- his_machine_name = argv[1];
- }
- *--cp = '\0';
- }
- if (argc > 2)
- his_tty = argv[2]; /* tty name is arg 2 */
- else
- his_tty = "";
- get_addrs(my_machine_name, his_machine_name);
- /*
- * Initialize the message template.
- */
- msg.vers = TALK_VERSION;
- msg.addr.sa_family = htons(AF_INET);
- msg.ctl_addr.sa_family = htons(AF_INET);
- msg.id_num = htonl(0);
- strncpy(msg.l_name, my_name, NAME_SIZE);
- msg.l_name[NAME_SIZE - 1] = '\0';
- strncpy(msg.r_name, his_name, NAME_SIZE);
- msg.r_name[NAME_SIZE - 1] = '\0';
- strncpy(msg.r_tty, his_tty, TTY_SIZE);
- msg.r_tty[TTY_SIZE - 1] = '\0';
-
- free (my_machine_name);
- }
-