diff options
Diffstat (limited to 'usr.bin/talk/get_names.c')
| -rw-r--r-- | usr.bin/talk/get_names.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/usr.bin/talk/get_names.c b/usr.bin/talk/get_names.c new file mode 100644 index 0000000..8da8e4a --- /dev/null +++ b/usr.bin/talk/get_names.c @@ -0,0 +1,115 @@ +/* + * 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. + * 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. + */ + +#include <sys/cdefs.h> + +__FBSDID("$FreeBSD$"); + +#ifndef lint +static const char sccsid[] = "@(#)get_names.c 8.1 (Berkeley) 6/6/93"; +#endif + +#include <sys/param.h> + +#include <err.h> +#include <pwd.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "talk.h" + +extern CTL_MSG msg; + +static void +usage(void) +{ + fprintf(stderr, "usage: talk person [ttyname]\n"); + exit(1); +} + +/* + * Determine the local and remote user, tty, and machines + */ +void +get_names(int argc, char *argv[]) +{ + char hostname[MAXHOSTNAMELEN]; + char *his_name, *my_name; + const char *my_machine_name, *his_machine_name; + const char *his_tty; + char *cp; + + if (argc < 2 ) + usage(); + if (!isatty(0)) + errx(1, "standard input must be a tty, not a pipe or a file"); + if ((my_name = getlogin()) == NULL) { + struct passwd *pw; + + if ((pw = getpwuid(getuid())) == NULL) + errx(1, "you don't exist. Go away"); + my_name = pw->pw_name; + } + gethostname(hostname, sizeof (hostname)); + my_machine_name = hostname; + /* check for, and strip out, the machine name of the target */ + cp = argv[1] + strcspn(argv[1], "@:!"); + if (*cp == '\0') { + /* this is a local to local talk */ + his_name = argv[1]; + my_machine_name = his_machine_name = "localhost"; + } else { + if (*cp++ == '@') { + /* user@host */ + his_name = argv[1]; + his_machine_name = cp; + } else { + /* 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); + strlcpy(msg.l_name, my_name, NAME_SIZE); + strlcpy(msg.r_name, his_name, NAME_SIZE); + strlcpy(msg.r_tty, his_tty, TTY_SIZE); +} |
