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
: