Commit | Line | Data |
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d0aeaf5a DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
f9ac90b4 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
b36fc510 KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
d0aeaf5a DF |
16 | */ |
17 | ||
963ce42e | 18 | #ifndef lint |
b36fc510 | 19 | static char sccsid[] = "@(#)get_names.c 5.5 (Berkeley) %G%"; |
f9ac90b4 | 20 | #endif /* not lint */ |
3e758ab9 MK |
21 | |
22 | #include "talk.h" | |
4fa2ac2d KM |
23 | #include <sys/param.h> |
24 | #include <protocols/talkd.h> | |
82439d4b | 25 | #include <pwd.h> |
3e758ab9 | 26 | |
4fa2ac2d KM |
27 | char *getlogin(); |
28 | char *ttyname(); | |
29 | char *rindex(); | |
4fa2ac2d | 30 | extern CTL_MSG msg; |
963ce42e | 31 | |
3e758ab9 MK |
32 | /* |
33 | * Determine the local and remote user, tty, and machines | |
34 | */ | |
3e758ab9 | 35 | get_names(argc, argv) |
963ce42e MK |
36 | int argc; |
37 | char *argv[]; | |
3e758ab9 | 38 | { |
4fa2ac2d KM |
39 | char hostname[MAXHOSTNAMELEN]; |
40 | char *his_name, *my_name; | |
41 | char *my_machine_name, *his_machine_name; | |
42 | char *my_tty, *his_tty; | |
43 | register char *cp; | |
963ce42e MK |
44 | |
45 | if (argc < 2 ) { | |
4fa2ac2d | 46 | printf("Usage: talk user [ttyname]\n"); |
963ce42e MK |
47 | exit(-1); |
48 | } | |
49 | if (!isatty(0)) { | |
50 | printf("Standard input must be a tty, not a pipe or a file\n"); | |
51 | exit(-1); | |
52 | } | |
82439d4b EW |
53 | if ((my_name = getlogin()) == NULL) { |
54 | struct passwd *pw; | |
55 | ||
56 | if ((pw = getpwuid(getuid())) == NULL) { | |
57 | printf("You don't exist. Go away.\n"); | |
58 | exit(-1); | |
59 | } | |
60 | my_name = pw->pw_name; | |
963ce42e MK |
61 | } |
62 | gethostname(hostname, sizeof (hostname)); | |
63 | my_machine_name = hostname; | |
963ce42e | 64 | /* check for, and strip out, the machine name of the target */ |
4fa2ac2d | 65 | for (cp = argv[1]; *cp && !any(*cp, "@:!."); cp++) |
963ce42e | 66 | ; |
4fa2ac2d | 67 | if (*cp == '\0') { |
963ce42e MK |
68 | /* this is a local to local talk */ |
69 | his_name = argv[1]; | |
70 | his_machine_name = my_machine_name; | |
3e758ab9 | 71 | } else { |
4fa2ac2d | 72 | if (*cp++ == '@') { |
963ce42e MK |
73 | /* user@host */ |
74 | his_name = argv[1]; | |
4fa2ac2d | 75 | his_machine_name = cp; |
963ce42e MK |
76 | } else { |
77 | /* host.user or host!user or host:user */ | |
4fa2ac2d | 78 | his_name = cp; |
963ce42e MK |
79 | his_machine_name = argv[1]; |
80 | } | |
4fa2ac2d | 81 | *--cp = '\0'; |
3e758ab9 | 82 | } |
963ce42e MK |
83 | if (argc > 2) |
84 | his_tty = argv[2]; /* tty name is arg 2 */ | |
85 | else | |
86 | his_tty = ""; | |
87 | get_addrs(my_machine_name, his_machine_name); | |
4fa2ac2d KM |
88 | /* |
89 | * Initialize the message template. | |
90 | */ | |
91 | msg.vers = TALK_VERSION; | |
92 | msg.addr.sa_family = htons(AF_INET); | |
93 | msg.ctl_addr.sa_family = htons(AF_INET); | |
94 | msg.id_num = htonl(0); | |
963ce42e MK |
95 | strncpy(msg.l_name, my_name, NAME_SIZE); |
96 | msg.l_name[NAME_SIZE - 1] = '\0'; | |
97 | strncpy(msg.r_name, his_name, NAME_SIZE); | |
98 | msg.r_name[NAME_SIZE - 1] = '\0'; | |
99 | strncpy(msg.r_tty, his_tty, TTY_SIZE); | |
100 | msg.r_tty[TTY_SIZE - 1] = '\0'; | |
3e758ab9 | 101 | } |
4fa2ac2d KM |
102 | |
103 | static | |
104 | any(c, cp) | |
105 | register char c, *cp; | |
106 | { | |
107 | ||
108 | while (*cp) | |
109 | if (c == *cp++) | |
110 | return (1); | |
111 | return (0); | |
112 | } |