3 * - useful general-purpose resolver client program
4 * option handling tables etc.
8 * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
10 * It is part of adns, which is
11 * Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
12 * Copyright (C) 1999 Tony Finch <dot@dotat.at>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
31 int ov_env=1, ov_pipe=0, ov_asynch=0;
33 adns_rrtype ov_type= adns_r_none;
34 int ov_search=0, ov_qc_query=0, ov_qc_anshost=0, ov_qc_cname=1;
35 int ov_tcp=0, ov_cname=0;
37 struct perqueryflags_remember ov_pqfr = { 1,1,1, tm_none };
39 static const struct optioninfo global_options[]= {
40 { ot_desconly, "global binary options:" },
41 { ot_flag, "Do not look at environment variables at all",
42 "e", "env", &ov_env, 0 },
43 { ot_flag, "Read queries on stdin instead of using args",
44 "f", "pipe", &ov_pipe, 1 },
45 { ot_flag, "Allow answers to be reordered",
46 "a", "asynch", &ov_asynch, 1 },
48 { ot_desconly, "global verbosity level:" },
49 { ot_value, "Do not print anything to stderr",
50 "Vq", "quiet", &ov_verbose, adns_if_noerrprint },
51 { ot_value, "Report unexpected kinds of problem only (default)",
52 "Vn", "no-quiet", &ov_verbose, 0 },
53 { ot_value, "Debugging mode",
54 "Vd", "debug", &ov_verbose, adns_if_debug },
56 { ot_desconly, "other global options:" },
57 { ot_func, "Print usage information",
58 0, "help", 0,0, of_help },
63 static const struct optioninfo perquery_options[]= {
64 { ot_desconly, "per-query options:" },
65 { ot_funcarg, "Query type (see below)",
66 "t", "type", 0,0, &of_type, "type" },
68 { ot_desconly, "per-query binary options:" },
69 { ot_flag, "Use the search list",
70 "s", "search", &ov_search, 1 },
71 { ot_flag, "Let query domains contain quote-requiring chars",
72 "Qq", "qc-query", &ov_qc_query, 1 },
73 { ot_flag, "Let hostnames in answers contain ...",
74 "Qa", "qc-anshost", &ov_qc_anshost, 1 },
75 { ot_flag, "Prevent CNAME target domains from containing ...",
76 "Qc", "qc-cname", &ov_qc_cname, 0 },
77 { ot_flag, "Force use of a virtual circuit",
78 "u", "tcp", &ov_tcp, 1 },
79 { ot_flag, "Do not display owner name in output",
80 "Do", "show-owner", &ov_pqfr.show_owner, 0 },
81 { ot_flag, "Do not display RR type in output",
82 "Dt", "show-type", &ov_pqfr.show_type, 0 },
83 { ot_flag, "Do not display CNAME target in output",
84 "Dc", "show-cname", &ov_pqfr.show_cname, 0 },
86 { ot_desconly, "per-query TTL mode (NB TTL is minimum across all info in reply):" },
87 { ot_value, "Show the TTL as a TTL",
88 "Tt", "ttl-ttl", &ov_pqfr.ttl, tm_rel },
89 { ot_value, "Show the TTL as a time_t when the data might expire",
90 "Ta", "ttl-abs", &ov_pqfr.ttl, tm_abs },
91 { ot_value, "Do not show the TTL (default)",
92 "Tn", "no-ttl", &ov_pqfr.ttl, tm_none },
94 { ot_desconly, "per-query CNAME handling mode:" },
95 { ot_value, "Call it an error if a CNAME is found",
96 "Cf", "cname-reject", &ov_cname, adns_qf_cname_forbid },
97 { ot_value, "Allow references to CNAMEs in other RRs",
98 "Cl", "cname-loose", &ov_cname, adns_qf_cname_loose },
99 { ot_value, "CNAME ok for query domain, but not in RRs (default)",
100 "Cs", "cname-ok", &ov_cname, 0 },
102 { ot_desconly, "asynchronous/pipe mode options:" },
103 { ot_funcarg, "Set <id>, default is decimal sequence starting 0",
104 "i", "asynch-id", 0,0, &of_asynch_id, "id" },
105 { ot_funcarg, "Cancel the query with id <id>",
106 0, "cancel-id", 0,0, &of_cancel_id, "id" },
111 static void printusage(void) {
112 static const struct optioninfo *const all_optiontables[]= {
113 global_options, perquery_options, 0
116 const struct optioninfo *const *oiap, *oip=0;
117 int maxsopt, maxlopt, l;
121 for (oiap=all_optiontables; *oiap; oiap++) {
122 for (oip=*oiap; oip->type != ot_end; oip++) {
123 if (oip->type == ot_funcarg) continue;
124 if (oip->sopt) { l= strlen(oip->sopt); if (l>maxsopt) maxsopt= l; }
126 l= strlen(oip->lopt);
127 if (oip->type == ot_flag && !oip->value) l+= 3;
128 if (l>maxlopt) maxlopt= l;
133 fputs("usage: adnshost [global-opts] [query-opts] query-domain\n"
134 " [[query-opts] query-domain ...]\n"
135 " adnshost [global-opts] [query-opts] -f|--pipe\n",
138 for (oiap=all_optiontables; *oiap; oiap++) {
140 for (oip=*oiap; oip->type != ot_end; oip++) {
145 printf(" +%-*s --no-%-*s %s\n",
147 maxlopt-2, oip->lopt,
150 printf(" --no-%-*s %s\n",
151 maxlopt+maxsopt+1, oip->lopt,
156 case ot_value: case ot_func: /* fall through */
158 printf(" -%-*s --%-*s %s\n",
160 maxlopt+1, oip->lopt,
163 printf(" --%-*s %s\n",
164 maxlopt+maxsopt+3, oip->lopt,
170 l= (maxlopt + maxsopt - 9 -
171 (strlen(oip->sopt) + strlen(oip->lopt) + 2*strlen(oip->argdesc)));
172 printf(" -%s<%s> / --%s <%s>%*s%s\n",
173 oip->sopt, oip->argdesc, oip->lopt, oip->argdesc,
177 l= (maxlopt + maxsopt + 1 -
178 (strlen(oip->lopt) + strlen(oip->argdesc)));
179 printf(" --%s <%s>%*s%s\n",
180 oip->lopt, oip->argdesc,
186 printf("%s\n", oip->desc);
194 printf("\nEscaping domains which might start with `-':\n"
195 " - %-*s Next argument is a domain, but more options may follow\n",
196 maxlopt+maxsopt+3, "<domain>");
199 "Query domains should always be quoted according to master file format.\n"
201 "For binary options, --FOO and --no-FOO are opposites, as are\n"
202 "-X and +X. In each case the default is the one not listed.\n"
203 "Per query options stay set a particular way until they are reset,\n"
204 "whether they appear on the command line or on stdin.\n"
205 "All global options must preceed the first query domain.\n"
207 "With -f, the input should be lines with either an option, possibly\n"
208 "with a value argument (separated from the option by a space if it's a long\n"
209 "option), or a domain (possibly preceded by a hyphen and a space to\n"
210 "distinguish it from an option).\n"
212 "Output format is master file format without class or TTL by default:\n"
213 " [<owner>] [<ttl>] [<type>] <data>\n"
214 "or if the <owner> domain refers to a CNAME and --show-cname is on\n"
215 " [<owner>] [<ttl>] CNAME <cname>\n"
216 " [<cname>] [<ttl>] <type> <data>\n"
217 "When a query fails you get a line like:\n"
218 " ; failed <statustype> [<owner>] [<ttl>] [<type>] <status> \"<status string>\"\n"
220 "If you use --asynch each answer (success or failure) is preceded by a line\n"
221 " <id> <statustype> <status> <nrrs> [<cname>] \"<status string>\"\n"
222 "where <nrrs> is the number of RRs that follow and <cname> will be `$' or\n"
223 "the CNAME target; the CNAME indirection and error formats above are not used.\n"
227 " 1-6 at least one query failed with statustype:\n"
229 " 2 remotefail ) temporary errors\n"
230 " 3 tempfail __)_________________\n"
232 " 5 misquery ) permanent errors\n"
234 " 10 system trouble\n"
235 " 11 usage problems\n"
237 "Query types (see adns.h; default is addr):\n"
238 " ns soa ptr mx rp addr - enhanced versions\n"
239 " cname hinfo txt - types with only one version\n"
240 " a ns- soa- ptr- mx- rp- - _raw versions\n",
242 if (ferror(stdout)) sysfail("write usage message",errno);
245 void of_help(const struct optioninfo *oi, const char *arg) {
247 if (fclose(stdout)) sysfail("finish writing output",errno);
251 typedef int comparer_type(const char **optp, const struct optioninfo *entry);
253 static int oc_long(const char **optp, const struct optioninfo *entry) {
254 return entry->lopt && !strcmp(*optp,entry->lopt);
257 static int oc_short(const char **optp, const struct optioninfo *entry) {
264 if (memcmp(*optp,sopt,l)) return 0;
269 static const struct optioninfo *find1(const char **optp,
270 const struct optioninfo *table,
271 comparer_type *comparer) {
273 if (table->type == ot_end) return 0;
274 if (comparer(optp,table)) return table;
279 static const struct optioninfo *find(const char **optp,
281 comparer_type *comparer) {
282 const struct optioninfo *oip;
284 oip= find1(optp,perquery_options,comparer);
286 oip= find1(optp,global_options,comparer);
287 if (!oip) usageerr("unknown option %s%s",prefix,*optp);
288 if (ads) usageerr("global option %s%s specified after query domain(s)",prefix,*optp);
292 const struct optioninfo *opt_findl(const char *opt) { return find(&opt,"--",oc_long); }
293 const struct optioninfo *opt_finds(const char **optp) { return find(optp,"-",oc_short); }
295 void opt_do(const struct optioninfo *oip, const char *arg) {
297 case ot_flag: case ot_value:
299 *oip->storep= oip->value;
301 case ot_func: case ot_funcarg: