1 /* vi: set sw=4 ts=4: */
3 * Mini hostname implementation for busybox
5 * Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
7 * Adjusted by Erik Andersen <andersen@codepoet.org> to remove
8 * use of long options and GNU getopt. Improved the usage info.
10 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
14 static void do_sethostname(char *s
, int isfile
)
19 parser_t
*parser
= config_open2(s
, xfopen_for_read
);
20 while (config_read(parser
, &s
, 1, 1, "# \t", PARSE_NORMAL
& ~PARSE_GREEDY
)) {
23 if (ENABLE_FEATURE_CLEAN_UP
)
25 } else if (sethostname(s
, strlen(s
))) {
26 // if (errno == EPERM)
27 // bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
28 bb_perror_msg_and_die("sethostname");
32 /* Manpage circa 2009:
34 * hostname [-v] [-a] [--alias] [-d] [--domain] [-f] [--fqdn] [--long]
35 * [-i] [--ip-address] [-s] [--short] [-y] [--yp] [--nis]
37 * hostname [-v] [-F filename] [--file filename] / [hostname]
39 * domainname [-v] [-F filename] [--file filename] / [name]
40 * { bbox: not supported }
42 * nodename [-v] [-F filename] [--file filename] / [name]
43 * { bbox: not supported }
46 * { bbox: supported: Linux kernel build needs this }
48 * { bbox: not supported }
50 * { bbox: not supported }
53 * Display the alias name of the host (if used).
54 * { bbox: not supported }
56 * Display the name of the DNS domain. Don't use the command
57 * domainname to get the DNS domain name because it will show the
58 * NIS domain name and not the DNS domain name. Use dnsdomainname
61 * Display the FQDN (Fully Qualified Domain Name). A FQDN consists
62 * of a short host name and the DNS domain name. Unless you are
63 * using bind or NIS for host lookups you can change the FQDN and
64 * the DNS domain name (which is part of the FQDN) in the
67 * Display the IP address(es) of the host.
69 * Display the short host name. This is the host name cut at the
72 * Be verbose and tell what's going on.
73 * { bbox: supported but ignored }
75 * Display the NIS domain name. If a parameter is given (or --file
76 * name ) then root can also set a new NIS domain.
77 * { bbox: not supported }
79 * Read the host name from the specified file. Comments (lines
80 * starting with a `#') are ignored.
82 int hostname_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
83 int hostname_main(int argc UNUSED_PARAM
, char **argv
)
100 "domain\0" No_argument
"d"
101 "fqdn\0" No_argument
"f"
102 //Enable if seen in active use in some distro:
103 // "long\0" No_argument "f"
104 // "ip-address\0" No_argument "i"
105 // "short\0" No_argument "s"
106 // "verbose\0" No_argument "v"
107 "file\0" No_argument
"F"
111 /* dnsdomainname from net-tools 1.60, hostname 1.100 (2001-04-14),
112 * supports hostname's options too (not just -v as manpage says) */
113 opts
= getopt32(argv
, "dfisF:v", &hostname_str
);
115 buf
= safe_gethostname();
116 if (applet_name
[0] == 'd') /* dnsdomainname? */
119 if (opts
& OPT_dfis
) {
120 /* Cases when we need full hostname (or its part) */
124 hp
= xgethostbyname(buf
);
125 p
= strchrnul(hp
->h_name
, '.');
128 } else if (opts
& OPT_s
) {
131 } else if (opts
& OPT_d
) {
134 } else /*if (opts & OPT_i)*/ {
135 if (hp
->h_length
== sizeof(struct in_addr
)) {
136 struct in_addr
**h_addr_list
= (struct in_addr
**)hp
->h_addr_list
;
137 while (*h_addr_list
) {
138 printf("%s ", inet_ntoa(**h_addr_list
));
144 } else if (opts
& OPT_F
) {
145 /* Set the hostname */
146 do_sethostname(hostname_str
, 1);
147 } else if (argv
[0]) {
148 /* Set the hostname */
149 do_sethostname(argv
[0], 0);
151 /* Just print the current hostname */
155 if (ENABLE_FEATURE_CLEAN_UP
)