3 * - useful general-purpose resolver client program
7 * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
9 * It is part of adns, which is
10 * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
11 * Copyright (C) 1999 Tony Finch <dot@dotat.at>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2, or (at your option)
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software Foundation,
25 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
35 static void sysfail(const char *what, int errnoval) NONRETURNING;
36 static void sysfail(const char *what, int errnoval) {
37 fprintf(stderr,"adnshost failed: %s: %s\n",what,strerror(errnoval));
42 typedef void optfunc(const struct optinfo *oi, const char *arg);
47 ot_flag, ot_value, ot_func, ot_funcarg
50 const char *sopt, *lopt;
56 static int ov_env=1, ov_pipe=0, ov_asynch=0;
57 static int ov_verbose= 0;
58 static int ov_search=0, ov_qc_query=0, ov_qc_anshost=0, ov_qc_cname=1;
59 static int ov_tcp=0, ov_show_owner=1, ov_show_type=1, ov_show_cname=1;
60 static int ov_cname=0;
61 enum ttlmode { tm_none, tm_rel, tm_abs };
62 static int ov_ttl= tm_none;
64 static optfunc of_help, of_type, of_asynch_id, of_cancel_id;
66 static const struct optinfo global_options[]= {
67 { ot_desconly, "global binary options:" },
68 { ot_flag, "Do not look at environment variables at all",
69 "e", "env", &ov_env, 0 },
70 { ot_flag, "Read queries on stdin instead of using args",
71 "f", "pipe", &ov_pipe, 1 },
72 { ot_flag, "Allow answers to be reordered",
73 "a", "asynch", &ov_asynch, 1 },
75 { ot_desconly, "global verbosity level:" },
76 { ot_value, "Do not print anything to stderr",
77 "Vq", "quiet", &ov_verbose, adns_if_noerrprint },
78 { ot_value, "Report unexpected kinds of problem only (default)",
79 "Vn", "no-quiet", &ov_verbose, 0 },
80 { ot_value, "Debugging mode",
81 "Vd", "debug", &ov_verbose, adns_if_debug },
83 { ot_desconly, "other global options:" },
84 { ot_func, "Print usage information",
85 0, "help", 0,0, of_help },
90 static const struct optinfo perquery_options[]= {
91 { ot_desconly, "per-query options:" },
92 { ot_funcarg, "Query type (see below)",
93 "t", "type", 0,0, &of_type, "type" },
95 { ot_desconly, "per-query binary options:" },
96 { ot_flag, "Use the search list",
97 "s", "search", &ov_search, 1 },
98 { ot_flag, "Let query domains contain quote-requiring chars",
99 "Qq", "qc-query", &ov_qc_query, 1 },
100 { ot_flag, "Let hostnames in answers contain ...",
101 "Qa", "qc-anshost", &ov_qc_anshost, 1 },
102 { ot_flag, "Prevent CNAME target domains from containing ...",
103 "Qc", "qc-cname", &ov_qc_cname, 0 },
104 { ot_flag, "Force use of a virtual circuit",
105 "u", "tcp", &ov_tcp, 1 },
106 { ot_flag, "Do not display owner name in output",
107 "Do", "show-owner", &ov_show_owner, 0 },
108 { ot_flag, "Do not display RR type in output",
109 "Dt", "show-type", &ov_show_type, 0 },
110 { ot_flag, "Do not display CNAME target in output",
111 "Dc", "show-cname", &ov_show_cname, 0 },
113 { ot_desconly, "per-query TTL mode (NB TTL is minimum across all info in reply):" },
114 { ot_value, "Show the TTL as a TTL",
115 "Tt", "ttl-ttl", &ov_ttl, tm_rel },
116 { ot_value, "Show the TTL as a time_t when the data might expire",
117 "Ta", "ttl-abs", &ov_ttl, tm_abs },
118 { ot_value, "Do not show the TTL (default)",
119 "Tn", "no-ttl", &ov_ttl, tm_none },
121 { ot_desconly, "per-query CNAME handling mode:" },
122 { ot_value, "Call it an error if a CNAME is found",
123 "Cf", "cname-reject", &ov_cname, adns_qf_cname_forbid },
124 { ot_value, "Allow references to CNAMEs in other RRs",
125 "Cl", "cname-loose", &ov_cname, adns_qf_cname_loose },
126 { ot_value, "CNAME ok for query domain, but not in RRs (default)",
127 "Cs", "cname-ok", &ov_cname, 0 },
132 static const struct optinfo asynch_options[]= {
133 { ot_desconly, "asynchronous mode `options':" },
134 { ot_funcarg, "Set <id>, default is decimal sequence starting 0",
135 "i", "asynch-id", 0,0, &of_asynch_id, "id" },
136 { ot_funcarg, "Cancel the query with id <id>",
137 0, "cancel-id", 0,0, &of_cancel_id, "id" },
142 static void printusage(void) {
143 static const struct optinfo *const alloptions[]= {
144 global_options, perquery_options, asynch_options, 0
147 const struct optinfo *const *oiap, *oip=0;
148 int maxsopt, maxlopt, l;
152 for (oiap=alloptions; *oiap; oiap++) {
153 for (oip=*oiap; oip->type != ot_end; oip++) {
154 if (oip->type == ot_funcarg) continue;
155 if (oip->sopt) { l= strlen(oip->sopt); if (l>maxsopt) maxsopt= l; }
157 l= strlen(oip->lopt);
158 if (oip->type == ot_flag && !oip->value) l+= 3;
159 if (l>maxlopt) maxlopt= l;
164 fputs("usage: adnshost [global-opts] [query-opts] query-domain\n"
165 " [[query-opts] query-domain ...]\n"
166 " adnshost [global-opts] [query-opts] -f|--pipe\n",
169 for (oiap=alloptions; *oiap; oiap++) {
171 for (oip=*oiap; oip->type != ot_end; oip++) {
176 printf(" +%-*s --no-%-*s %s\n",
178 maxlopt-2, oip->lopt,
181 printf(" --no-%-*s %s\n",
182 maxlopt+maxsopt+1, oip->lopt,
187 case ot_value: case ot_func: /* fall through */
189 printf(" -%-*s --%-*s %s\n",
191 maxlopt+1, oip->lopt,
194 printf(" --%-*s %s\n",
195 maxlopt+maxsopt+3, oip->lopt,
201 l= (maxlopt + maxsopt - 9 -
202 (strlen(oip->sopt) + strlen(oip->lopt) + 2*strlen(oip->argdesc)));
203 printf(" -%s<%s> / --%s <%s>%*s%s\n",
204 oip->sopt, oip->argdesc, oip->lopt, oip->argdesc,
208 l= (maxlopt + maxsopt + 1 -
209 (strlen(oip->lopt) + strlen(oip->argdesc)));
210 printf(" --%s <%s>%*s%s\n",
211 oip->lopt, oip->argdesc,
217 printf("%s\n", oip->desc);
225 printf("\nEscaping domains which might start with `-':\n"
226 " - %-*s Next argument is a domain, but more options may follow\n",
227 maxlopt+maxsopt+3, "<domain>");
230 "Query domains should always be quoted according to master file format.\n"
232 "For binary options, --FOO and --no-FOO are opposites, as are\n"
233 "-X and +X. In each case the default is the one not listed.\n"
234 "Per query options stay set a particular way until they are reset,\n"
235 "whether they appear on the command line or on stdin.\n"
236 "All global options must preceed the first query domain.\n"
238 "With -f, the input should be lines with either an option, possibly\n"
239 "with a value argument (separated from the option by a space if it's a long\n"
240 "option), or a domain (possibly preceded by a hyphen and a space to\n"
241 "distinguish it from an option).\n"
243 "Output format is master file format without class or TTL by default:\n"
244 " [<owner>] [<ttl>] [<type>] <data>\n"
245 "or if the <owner> domain refers to a CNAME and --show-cname is on\n"
246 " [<owner>] [<ttl>] CNAME <cname>\n"
247 " [<cname>] [<ttl>] <type> <data>\n"
248 "When a query fails you get a line like:\n"
249 " ; failed <statustype> [<owner>] [<ttl>] [<type>] <status> \"<status string>\"\n"
251 "If you use --asynch each answer (success or failure) is preceded by a line\n"
252 " <id> <statustype> <status> <nrrs> [<cname>] \"<status string>\"\n"
253 "where <nrrs> is the number of RRs that follow and <cname> will be `$' or\n"
254 "the CNAME target; the CNAME indirection and error formats above are not used.\n"
258 " 1-6 at least one query failed with statustype:\n"
260 " 2 remotefail ) temporary errors\n"
261 " 3 tempfail __)_________________\n"
263 " 5 misquery ) permanent errors\n"
265 " 10 system trouble\n"
266 " 11 usage problems\n"
268 "Query types (see adns.h; default is addr):\n"
269 " ns soa ptr mx rp addr - enhanced versions\n"
270 " cname hinfo txt - types with only one version\n"
271 " a ns- soa- ptr- mx- rp- - _raw versions\n",
273 if (ferror(stdout)) sysfail("write usage message",errno);
276 static void of_help(const struct optinfo *oi, const char *arg) {
278 if (fclose(stdout)) sysfail("finish writing output",errno);
282 static void of_type(const struct optinfo *oi, const char *arg) { abort(); }
283 static void of_asynch_id(const struct optinfo *oi, const char *arg) { abort(); }
284 static void of_cancel_id(const struct optinfo *oi, const char *arg) { abort(); }
286 int main(int argc, const char *const *argv) {