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" },
67 { ot_funcarg
, "Do reverse query (address -> name lookup)",
68 "i", "ptr", 0,0, &of_ptr
, "addr" },
70 { ot_desconly
, "per-query binary options:" },
71 { ot_flag
, "Use the search list",
72 "s", "search", &ov_search
, 1 },
73 { ot_flag
, "Let query domains contain quote-requiring chars",
74 "Qq", "qc-query", &ov_qc_query
, 1 },
75 { ot_flag
, "Let hostnames in answers contain ...",
76 "Qa", "qc-anshost", &ov_qc_anshost
, 1 },
77 { ot_flag
, "Prevent CNAME target domains from containing ...",
78 "Qc", "qc-cname", &ov_qc_cname
, 0 },
79 { ot_flag
, "Force use of a virtual circuit",
80 "u", "tcp", &ov_tcp
, 1 },
81 { ot_flag
, "Do not display owner name in output",
82 "Do", "show-owner", &ov_pqfr
.show_owner
, 0 },
83 { ot_flag
, "Do not display RR type in output",
84 "Dt", "show-type", &ov_pqfr
.show_type
, 0 },
85 { ot_flag
, "Do not display CNAME target in output",
86 "Dc", "show-cname", &ov_pqfr
.show_cname
, 0 },
88 { ot_desconly
, "per-query TTL mode (NB TTL is minimum across all info in reply):" },
89 { ot_value
, "Show the TTL as a TTL",
90 "Tt", "ttl-ttl", &ov_pqfr
.ttl
, tm_rel
},
91 { ot_value
, "Show the TTL as a time_t when the data might expire",
92 "Ta", "ttl-abs", &ov_pqfr
.ttl
, tm_abs
},
93 { ot_value
, "Do not show the TTL (default)",
94 "Tn", "no-ttl", &ov_pqfr
.ttl
, tm_none
},
96 { ot_desconly
, "per-query CNAME handling mode:" },
97 { ot_value
, "Call it an error if a CNAME is found",
98 "Cf", "cname-reject", &ov_cname
, adns_qf_cname_forbid
},
99 { ot_value
, "Allow references to CNAMEs in other RRs",
100 "Cl", "cname-loose", &ov_cname
, adns_qf_cname_loose
},
101 { ot_value
, "CNAME ok for query domain, but not in RRs (default)",
102 "Cs", "cname-ok", &ov_cname
, 0 },
104 { ot_desconly
, "asynchronous/pipe mode options:" },
105 { ot_funcarg
, "Set <id>, default is decimal sequence starting 0",
106 0, "asynch-id", 0,0, &of_asynch_id
, "id" },
107 { ot_funcarg
, "Cancel the query with id <id> (no error if not found)",
108 0, "cancel-id", 0,0, &of_cancel_id
, "id" },
113 static void printusage(void) {
114 static const struct optioninfo
*const all_optiontables
[]= {
115 global_options
, perquery_options
, 0
118 const struct optioninfo
*const *oiap
, *oip
=0;
119 int maxsopt
, maxlopt
, l
;
123 for (oiap
=all_optiontables
; *oiap
; oiap
++) {
124 for (oip
=*oiap
; oip
->type
!= ot_end
; oip
++) {
125 if (oip
->type
== ot_funcarg
) continue;
126 if (oip
->sopt
) { l
= strlen(oip
->sopt
); if (l
>maxsopt
) maxsopt
= l
; }
128 l
= strlen(oip
->lopt
);
129 if (oip
->type
== ot_flag
&& !oip
->value
) l
+= 3;
130 if (l
>maxlopt
) maxlopt
= l
;
135 fputs("usage: adnshost [global-opts] [query-opts] query-domain\n"
136 " [[query-opts] query-domain ...]\n"
137 " adnshost [global-opts] [query-opts] -f|--pipe\n",
140 for (oiap
=all_optiontables
; *oiap
; oiap
++) {
142 for (oip
=*oiap
; oip
->type
!= ot_end
; oip
++) {
147 printf(" +%-*s --no-%-*s %s\n",
149 maxlopt
-2, oip
->lopt
,
152 printf(" --no-%-*s %s\n",
153 maxlopt
+maxsopt
+1, oip
->lopt
,
158 case ot_value
: case ot_func
: /* fall through */
160 printf(" -%-*s --%-*s %s\n",
162 maxlopt
+1, oip
->lopt
,
165 printf(" --%-*s %s\n",
166 maxlopt
+maxsopt
+3, oip
->lopt
,
172 l
= (maxlopt
+ maxsopt
- 9 -
173 (strlen(oip
->sopt
) + strlen(oip
->lopt
) + 2*strlen(oip
->argdesc
)));
174 printf(" -%s<%s> / --%s <%s>%*s%s\n",
175 oip
->sopt
, oip
->argdesc
, oip
->lopt
, oip
->argdesc
,
179 l
= (maxlopt
+ maxsopt
+ 1 -
180 (strlen(oip
->lopt
) + strlen(oip
->argdesc
)));
181 printf(" --%s <%s>%*s%s\n",
182 oip
->lopt
, oip
->argdesc
,
188 printf("%s\n", oip
->desc
);
196 printf("\nEscaping domains which might start with `-':\n"
197 " - %-*s Next argument is a domain, but more options may follow\n",
198 maxlopt
+maxsopt
+3, "<domain>");
201 "Query domains should always be quoted according to master file format.\n"
203 "For binary options, --FOO and --no-FOO are opposites, as are\n"
204 "-X and +X. In each case the default is the one not listed.\n"
205 "Per query options stay set a particular way until they are reset,\n"
206 "whether they appear on the command line or on stdin.\n"
207 "All global options must preceed the first query domain.\n"
209 "With -f, the input should be lines with either an option, possibly\n"
210 "with a value argument (separated from the option by a space if it's a long\n"
211 "option), or a domain (possibly preceded by a hyphen and a space to\n"
212 "distinguish it from an option).\n"
214 "Output format is master file format without class or TTL by default:\n"
215 " [<owner>] [<ttl>] [<type>] <data>\n"
216 "or if the <owner> domain refers to a CNAME and --show-cname is on\n"
217 " [<owner>] [<ttl>] CNAME <cname>\n"
218 " [<cname>] [<ttl>] <type> <data>\n"
219 "When a query fails you get a line like this (broken here for readability):\n"
220 " ; failed <statustype> <statusnum> <statusabbrev> \\\n"
221 " [<owner>] [<ttl>] [<cname>] \"<status string>\"\n"
223 "If you use --asynch each answer (success or failure) is preceded by a line\n"
224 " <id> <nrrs> <statustype> <statusnum> <statusabbrev> \\\n"
225 " [<owner>] [<ttl>] [<cname>] \"<status string>\"\n"
226 "where <nrrs> is the number of RRs that follow and <cname> will be `$' or\n"
227 "the CNAME target; the CNAME indirection and error formats above are not used.\n"
231 " 1-6 at least one query failed with statustype:\n"
233 " 2 remotefail ) temporary errors\n"
234 " 3 tempfail __)_________________\n"
236 " 5 misquery ) permanent errors\n"
238 " 10 system trouble\n"
239 " 11 usage problems\n"
241 "Query types (see adns.h; default is addr):\n"
242 " ns soa ptr mx rp addr - enhanced versions\n"
243 " cname hinfo txt - types with only one version\n"
244 " a ns- soa- ptr- mx- rp- - _raw versions\n"
245 "Default is addr, or ptr for -i/--ptr queries\n",
247 if (ferror(stdout
)) sysfail("write usage message",errno
);
250 void of_help(const struct optioninfo
*oi
, const char *arg
) {
252 if (fclose(stdout
)) sysfail("finish writing output",errno
);
256 typedef int comparer_type(const char **optp
, const struct optioninfo
*entry
);
258 static int oc_long(const char **optp
, const struct optioninfo
*entry
) {
259 return entry
->lopt
&& !strcmp(*optp
,entry
->lopt
);
262 static int oc_short(const char **optp
, const struct optioninfo
*entry
) {
269 if (memcmp(*optp
,sopt
,l
)) return 0;
274 static const struct optioninfo
*find1(const char **optp
,
275 const struct optioninfo
*table
,
276 comparer_type
*comparer
) {
278 if (table
->type
== ot_end
) return 0;
279 if (comparer(optp
,table
)) return table
;
284 static const struct optioninfo
*find(const char **optp
,
286 comparer_type
*comparer
) {
287 const struct optioninfo
*oip
;
291 oip
= find1(optp
,perquery_options
,comparer
);
293 oip
= find1(optp
,global_options
,comparer
);
294 if (!oip
) usageerr("unknown option %s%s",prefix
,opt
);
295 if (ads
) usageerr("global option %s%s specified after query domain(s)",prefix
,opt
);
299 const struct optioninfo
*opt_findl(const char *opt
) { return find(&opt
,"--",oc_long
); }
300 const struct optioninfo
*opt_finds(const char **optp
) { return find(optp
,"-",oc_short
); }
302 static void noninvert(const struct optioninfo
*oip
) NONRETURNING
;
303 static void noninvert(const struct optioninfo
*oip
) {
304 usageerr("option %s%s%s%s%s may not be inverted",
305 oip
->sopt ?
"-" : "", oip
->sopt ? oip
->sopt
: "",
306 oip
->lopt
&& oip
->sopt ?
" / " : "",
307 oip
->lopt ?
"--" : "", oip
->lopt ? oip
->lopt
: "");
310 void opt_do(const struct optioninfo
*oip
, const char *arg
, int invert
) {
314 *oip
->storep
= !invert
;
318 if (invert
) noninvert(oip
);
319 *oip
->storep
= oip
->value
;
321 case ot_func
: case ot_funcarg
:
322 if (invert
) noninvert(oip
);