1 /* vi: set sw=4 ts=4: */
3 * whois - tiny client for the whois directory service
5 * Copyright (c) 2011 Pere Orga <gotrunks@gmail.com>
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
14 //config: bool "whois (6.6 kb)"
17 //config: whois is a client for the whois directory service
19 //applet:IF_WHOIS(APPLET(whois, BB_DIR_USR_BIN, BB_SUID_DROP))
21 //kbuild:lib-$(CONFIG_WHOIS) += whois.o
23 //usage:#define whois_trivial_usage
24 //usage: "[-i] [-h SERVER] [-p PORT] NAME..."
25 //usage:#define whois_full_usage "\n\n"
26 //usage: "Query WHOIS info about NAME\n"
27 //usage: "\n -i Show redirect results too"
28 //usage: "\n -h,-p Server to query"
36 static char *query(const char *host, int port, const char *domain)
48 printf("[Querying %s:%d '%s%s']\n", host, port, pfx, domain);
49 fd = create_and_connect_stream_or_die(host, port);
51 fdprintf(fd, "%s%s\r\n", pfx, domain);
52 fp = xfdopen_for_read(fd);
54 while (fgets(linebuf, sizeof(linebuf), fp)) {
55 unsigned len = strcspn(linebuf, "\r\n");
56 linebuf[len++] = '\n';
58 buf = xrealloc(buf, bufpos + len + 1);
59 memcpy(buf + bufpos, linebuf, len);
63 if (!redir || !success) {
67 success = is_prefixed_with(linebuf, "domain:")
68 || is_prefixed_with(linebuf, "domain name:");
71 char *p = is_prefixed_with(linebuf, "whois server:");
73 p = is_prefixed_with(linebuf, "whois:");
75 redir = xstrdup(skip_whitespace(p));
79 fclose(fp); /* closes fd too */
80 if (!success && !pfx[0]) {
82 * Looking at /etc/jwhois.conf, some whois servers use
83 * "domain = DOMAIN", "DOMAIN ID <DOMAIN>"
84 * and "domain=DOMAIN_WITHOUT_LAST_COMPONENT"
85 * formats, but those are rare.
86 * (There are a few even more contrived ones.)
87 * We are trying only "domain DOMAIN", the typical one.
95 if (redir && strcmp(redir, host) == 0) {
96 /* Redirect to self does not count */
100 if (!redir || (option_mask32 & OPT_i)) {
101 /* Output saved text */
102 printf("[%s]\n%s", host, buf ? buf : "");
108 static void recursive_query(const char *host, int port, const char *domain)
110 char *free_me = NULL;
113 redir = query(host, port, domain);
116 printf("[Redirected to %s]\n", redir);
117 host = free_me = redir;
123 /* One of "big" whois implementations has these options:
126 * jwhois version 4.0, Copyright (C) 1999-2007 Free Software Foundation, Inc.
127 * -v, --verbose verbose debug output
128 * -c FILE, --config=FILE use FILE as configuration file
129 * -h HOST, --host=HOST explicitly query HOST
130 * -n, --no-redirect disable content redirection
131 * -s, --no-whoisservers disable whois-servers.net service support
132 * -a, --raw disable reformatting of the query
133 * -i, --display-redirections display all redirects instead of hiding them
134 * -p PORT, --port=PORT use port number PORT (in conjunction with HOST)
135 * -r, --rwhois force an rwhois query to be made
136 * --rwhois-display=DISPLAY sets the display option in rwhois queries
137 * --rwhois-limit=LIMIT sets the maximum number of matches to return
139 * Example of its output:
141 * [Querying whois.verisign-grs.com]
142 * [Redirected to whois.corporatedomains.com]
143 * [Querying whois.corporatedomains.com]
144 * [whois.corporatedomains.com]
145 * ...text of the reply...
147 * With -i, reply from each server is printed, after all redirects are done:
148 * [Querying whois.verisign-grs.com]
149 * [Redirected to whois.corporatedomains.com]
150 * [Querying whois.corporatedomains.com]
151 * [whois.verisign-grs.com]
152 * ...text of the reply...
153 * [whois.corporatedomains.com]
154 * ...text of the reply...
156 * With -a, no "DOMAIN" -> "domain DOMAIN" transformation is attempted.
158 * With -n, the first reply is shown, redirects are not followed:
159 * [Querying whois.verisign-grs.com]
160 * [whois.verisign-grs.com]
161 * ...text of the reply...
164 int whois_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
165 int whois_main(int argc UNUSED_PARAM, char **argv)
168 const char *host = "whois.iana.org";
170 opt_complementary = "-1";
171 getopt32(argv, "ih:p:+", &host, &port);
175 recursive_query(host, port, *argv);