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1 | /* |
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2 | * adh-opts.c |
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3 | * - useful general-purpose resolver client program |
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4 | * option handling tables etc. |
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5 | */ |
6 | /* |
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7 | * This file is |
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8 | * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk> |
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9 | * |
10 | * It is part of adns, which is |
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11 | * Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk> |
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12 | * Copyright (C) 1999-2000 Tony Finch <dot@dotat.at> |
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13 | * |
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) |
17 | * any later version. |
18 | * |
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. |
23 | * |
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. |
27 | */ |
28 | |
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29 | #include "adnshost.h" |
30 | |
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31 | int ov_env=1, ov_pipe=0, ov_asynch=0; |
32 | int ov_verbose= 0; |
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33 | adns_rrtype ov_type= adns_r_none; |
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34 | int ov_search=0, ov_qc_query=0, ov_qc_anshost=0, ov_qc_cname=1; |
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35 | int ov_tcp=0, ov_cname=0, ov_format=fmt_default; |
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36 | char *ov_id= 0; |
37 | struct perqueryflags_remember ov_pqfr = { 1,1,1, tm_none }; |
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38 | |
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39 | static const struct optioninfo global_options[]= { |
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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 }, |
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47 | |
48 | { ot_desconly, "answer/error output format and destination (see below):" }, |
49 | { ot_value, "Answers to stdout, errors as messages to stderr (default)", |
50 | "Fs", "fmt-simple", &ov_format, fmt_simple }, |
51 | { ot_value, "Answers and errors both to stdout in parseable format", |
52 | "Fi", "fmt-inline", &ov_format, fmt_inline }, |
53 | { ot_value, "Fully-parseable output format (default for --asynch)", |
54 | "Fa", "fmt-asynch", &ov_format, fmt_asynch }, |
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55 | |
56 | { ot_desconly, "global verbosity level:" }, |
57 | { ot_value, "Do not print anything to stderr", |
58 | "Vq", "quiet", &ov_verbose, adns_if_noerrprint }, |
59 | { ot_value, "Report unexpected kinds of problem only (default)", |
60 | "Vn", "no-quiet", &ov_verbose, 0 }, |
61 | { ot_value, "Debugging mode", |
62 | "Vd", "debug", &ov_verbose, adns_if_debug }, |
63 | |
64 | { ot_desconly, "other global options:" }, |
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65 | { ot_funcarg, "Configuration to use instead of /etc/resolv.conf", |
66 | 0, "config", 0,0, of_config, "<config-text>" }, |
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67 | { ot_func, "Print version number", |
68 | 0, "version", 0,0, of_version }, |
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69 | { ot_func, "Print usage information", |
70 | 0, "help", 0,0, of_help }, |
71 | |
72 | { ot_end } |
73 | }; |
74 | |
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75 | static const struct optioninfo perquery_options[]= { |
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76 | { ot_desconly, "per-query options:" }, |
77 | { ot_funcarg, "Query type (see below)", |
78 | "t", "type", 0,0, &of_type, "type" }, |
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79 | { ot_funcarg, "Do reverse query (address -> name lookup)", |
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80 | "i", "ptr", 0,0, &of_ptr, "addr" }, |
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81 | { ot_funcarg2, "Lookup in in-addr-like `zone' (eg MAPS RBL)", |
82 | 0, "reverse", 0,0, &of_reverse, "addr","zone" }, |
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83 | |
84 | { ot_desconly, "per-query binary options:" }, |
85 | { ot_flag, "Use the search list", |
86 | "s", "search", &ov_search, 1 }, |
87 | { ot_flag, "Let query domains contain quote-requiring chars", |
88 | "Qq", "qc-query", &ov_qc_query, 1 }, |
89 | { ot_flag, "Let hostnames in answers contain ...", |
90 | "Qa", "qc-anshost", &ov_qc_anshost, 1 }, |
91 | { ot_flag, "Prevent CNAME target domains from containing ...", |
92 | "Qc", "qc-cname", &ov_qc_cname, 0 }, |
93 | { ot_flag, "Force use of a virtual circuit", |
94 | "u", "tcp", &ov_tcp, 1 }, |
95 | { ot_flag, "Do not display owner name in output", |
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96 | "Do", "show-owner", &ov_pqfr.show_owner, 0 }, |
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97 | { ot_flag, "Do not display RR type in output", |
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98 | "Dt", "show-type", &ov_pqfr.show_type, 0 }, |
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99 | { ot_flag, "Do not display CNAME target in output", |
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100 | "Dc", "show-cname", &ov_pqfr.show_cname, 0 }, |
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101 | |
102 | { ot_desconly, "per-query TTL mode (NB TTL is minimum across all info in reply):" }, |
103 | { ot_value, "Show the TTL as a TTL", |
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104 | "Tt", "ttl-ttl", &ov_pqfr.ttl, tm_rel }, |
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105 | { ot_value, "Show the TTL as a time_t when the data might expire", |
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106 | "Ta", "ttl-abs", &ov_pqfr.ttl, tm_abs }, |
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107 | { ot_value, "Do not show the TTL (default)", |
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108 | "Tn", "no-ttl", &ov_pqfr.ttl, tm_none }, |
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109 | |
110 | { ot_desconly, "per-query CNAME handling mode:" }, |
111 | { ot_value, "Call it an error if a CNAME is found", |
112 | "Cf", "cname-reject", &ov_cname, adns_qf_cname_forbid }, |
113 | { ot_value, "Allow references to CNAMEs in other RRs", |
114 | "Cl", "cname-loose", &ov_cname, adns_qf_cname_loose }, |
115 | { ot_value, "CNAME ok for query domain, but not in RRs (default)", |
116 | "Cs", "cname-ok", &ov_cname, 0 }, |
117 | |
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118 | { ot_desconly, "asynchronous/pipe mode options:" }, |
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119 | { ot_funcarg, "Set <id>, default is decimal sequence starting 0", |
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120 | 0, "asynch-id", 0,0, &of_asynch_id, "id" }, |
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121 | { ot_funcarg, "Cancel the query with id <id> (no error if not found)", |
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122 | 0, "cancel-id", 0,0, &of_cancel_id, "id" }, |
123 | |
124 | { ot_end } |
125 | }; |
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126 | |
127 | static void printusage(void) { |
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128 | static const struct optioninfo *const all_optiontables[]= { |
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129 | global_options, perquery_options, 0 |
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130 | }; |
131 | |
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132 | const struct optioninfo *const *oiap, *oip=0; |
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133 | int maxsopt, maxlopt, l; |
134 | |
135 | maxsopt= maxlopt= 0; |
136 | |
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137 | for (oiap=all_optiontables; *oiap; oiap++) { |
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138 | for (oip=*oiap; oip->type != ot_end; oip++) { |
139 | if (oip->type == ot_funcarg) continue; |
140 | if (oip->sopt) { l= strlen(oip->sopt); if (l>maxsopt) maxsopt= l; } |
141 | if (oip->lopt) { |
142 | l= strlen(oip->lopt); |
143 | if (oip->type == ot_flag && !oip->value) l+= 3; |
144 | if (l>maxlopt) maxlopt= l; |
145 | } |
146 | } |
147 | } |
148 | |
149 | fputs("usage: adnshost [global-opts] [query-opts] query-domain\n" |
150 | " [[query-opts] query-domain ...]\n" |
151 | " adnshost [global-opts] [query-opts] -f|--pipe\n", |
152 | stdout); |
153 | |
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154 | for (oiap=all_optiontables; *oiap; oiap++) { |
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155 | putchar('\n'); |
156 | for (oip=*oiap; oip->type != ot_end; oip++) { |
157 | switch (oip->type) { |
158 | case ot_flag: |
159 | if (!oip->value) { |
160 | if (oip->sopt) { |
161 | printf(" +%-*s --no-%-*s %s\n", |
162 | maxsopt, oip->sopt, |
163 | maxlopt-2, oip->lopt, |
164 | oip->desc); |
165 | } else { |
166 | printf(" --no-%-*s %s\n", |
167 | maxlopt+maxsopt+1, oip->lopt, |
168 | oip->desc); |
169 | } |
170 | break; |
171 | } |
172 | case ot_value: case ot_func: /* fall through */ |
173 | if (oip->sopt) { |
174 | printf(" -%-*s --%-*s %s\n", |
175 | maxsopt, oip->sopt, |
176 | maxlopt+1, oip->lopt, |
177 | oip->desc); |
178 | } else { |
179 | printf(" --%-*s %s\n", |
180 | maxlopt+maxsopt+3, oip->lopt, |
181 | oip->desc); |
182 | } |
183 | break; |
184 | case ot_funcarg: |
185 | if (oip->sopt) { |
186 | l= (maxlopt + maxsopt - 9 - |
187 | (strlen(oip->sopt) + strlen(oip->lopt) + 2*strlen(oip->argdesc))); |
188 | printf(" -%s<%s> / --%s <%s>%*s%s\n", |
189 | oip->sopt, oip->argdesc, oip->lopt, oip->argdesc, |
190 | l>2 ? l : 2, "", |
191 | oip->desc); |
192 | } else { |
193 | l= (maxlopt + maxsopt + 1 - |
194 | (strlen(oip->lopt) + strlen(oip->argdesc))); |
195 | printf(" --%s <%s>%*s%s\n", |
196 | oip->lopt, oip->argdesc, |
197 | l>2 ? l : 2, "", |
198 | oip->desc); |
199 | } |
200 | break; |
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201 | case ot_funcarg2: |
202 | assert(!oip->sopt); |
203 | l= (maxlopt + maxsopt - 2 - |
204 | (strlen(oip->lopt) + strlen(oip->argdesc) + strlen(oip->argdesc2))); |
205 | printf(" --%s <%s> <%s>%*s%s\n", |
206 | oip->lopt, oip->argdesc, oip->argdesc2, |
207 | l>2 ? l : 2, "", |
208 | oip->desc); |
209 | break; |
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210 | case ot_desconly: |
211 | printf("%s\n", oip->desc); |
212 | break; |
213 | default: |
214 | abort(); |
215 | } |
216 | } |
217 | } |
218 | |
219 | printf("\nEscaping domains which might start with `-':\n" |
220 | " - %-*s Next argument is a domain, but more options may follow\n", |
221 | maxlopt+maxsopt+3, "<domain>"); |
222 | |
223 | fputs("\n" |
224 | "Query domains should always be quoted according to master file format.\n" |
225 | "\n" |
226 | "For binary options, --FOO and --no-FOO are opposites, as are\n" |
227 | "-X and +X. In each case the default is the one not listed.\n" |
228 | "Per query options stay set a particular way until they are reset,\n" |
229 | "whether they appear on the command line or on stdin.\n" |
230 | "All global options must preceed the first query domain.\n" |
231 | "\n" |
232 | "With -f, the input should be lines with either an option, possibly\n" |
233 | "with a value argument (separated from the option by a space if it's a long\n" |
234 | "option), or a domain (possibly preceded by a hyphen and a space to\n" |
235 | "distinguish it from an option).\n" |
236 | "\n" |
237 | "Output format is master file format without class or TTL by default:\n" |
238 | " [<owner>] [<ttl>] [<type>] <data>\n" |
239 | "or if the <owner> domain refers to a CNAME and --show-cname is on\n" |
240 | " [<owner>] [<ttl>] CNAME <cname>\n" |
241 | " [<cname>] [<ttl>] <type> <data>\n" |
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242 | "When a query fails you get an error message to stderr (with --fmt-simple).\n" |
243 | "Specify --fmt-inline for lines like this (broken here for readability):\n" |
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244 | " ; failed <statustype> <statusnum> <statusabbrev> \\\n" |
245 | " [<owner>] [<ttl>] [<cname>] \"<status string>\"\n" |
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246 | "If you use --fmt-asynch, which is the default for --asynch,\n" |
247 | "each answer (success or failure) is preceded by a line\n" |
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248 | " <id> <nrrs> <statustype> <statusnum> <statusabbrev> \\\n" |
249 | " [<owner>] [<ttl>] [<cname>] \"<status string>\"\n" |
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250 | "where <nrrs> is the number of RRs that follow and <cname> will be `$' or\n" |
251 | "the CNAME target; the CNAME indirection and error formats above are not used.\n" |
252 | "\n" |
253 | "Exit status:\n" |
254 | " 0 all went well\n" |
255 | " 1-6 at least one query failed with statustype:\n" |
256 | " 1 localfail )\n" |
257 | " 2 remotefail ) temporary errors\n" |
258 | " 3 tempfail __)_________________\n" |
259 | " 4 misconfig )\n" |
260 | " 5 misquery ) permanent errors\n" |
261 | " 6 permfail )\n" |
262 | " 10 system trouble\n" |
263 | " 11 usage problems\n" |
264 | "\n" |
265 | "Query types (see adns.h; default is addr):\n" |
266 | " ns soa ptr mx rp addr - enhanced versions\n" |
267 | " cname hinfo txt - types with only one version\n" |
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268 | " a ns- soa- ptr- mx- rp- - _raw versions\n" |
269 | "Default is addr, or ptr for -i/--ptr queries\n", |
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270 | stdout); |
271 | if (ferror(stdout)) sysfail("write usage message",errno); |
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272 | } |
273 | |
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274 | void of_version(const struct optioninfo *oi, const char *arg, const char *arg2) { |
275 | VERSION_PRINT_QUIT("adnshost"); |
276 | } |
277 | |
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278 | void of_help(const struct optioninfo *oi, const char *arg, const char *arg2) { |
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279 | printusage(); |
280 | if (fclose(stdout)) sysfail("finish writing output",errno); |
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281 | quitnow(0); |
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282 | } |
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283 | |
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284 | typedef int comparer_type(const char **optp, const struct optioninfo *entry); |
285 | |
286 | static int oc_long(const char **optp, const struct optioninfo *entry) { |
287 | return entry->lopt && !strcmp(*optp,entry->lopt); |
288 | } |
289 | |
290 | static int oc_short(const char **optp, const struct optioninfo *entry) { |
291 | const char *sopt; |
292 | int l; |
293 | |
294 | sopt= entry->sopt; |
295 | if (!sopt) return 0; |
296 | l= strlen(sopt); |
297 | if (memcmp(*optp,sopt,l)) return 0; |
298 | (*optp) += l; |
299 | return 1; |
300 | } |
301 | |
302 | static const struct optioninfo *find1(const char **optp, |
303 | const struct optioninfo *table, |
304 | comparer_type *comparer) { |
305 | for (;;) { |
306 | if (table->type == ot_end) return 0; |
307 | if (comparer(optp,table)) return table; |
308 | table++; |
309 | } |
310 | } |
311 | |
312 | static const struct optioninfo *find(const char **optp, |
313 | const char *prefix, |
314 | comparer_type *comparer) { |
315 | const struct optioninfo *oip; |
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316 | const char *opt; |
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317 | |
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318 | opt= *optp; |
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319 | oip= find1(optp,perquery_options,comparer); |
320 | if (oip) return oip; |
321 | oip= find1(optp,global_options,comparer); |
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322 | if (!oip) usageerr("unknown option %s%s",prefix,opt); |
323 | if (ads) usageerr("global option %s%s specified after query domain(s)",prefix,opt); |
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324 | return oip; |
325 | } |
326 | |
327 | const struct optioninfo *opt_findl(const char *opt) { return find(&opt,"--",oc_long); } |
328 | const struct optioninfo *opt_finds(const char **optp) { return find(optp,"-",oc_short); } |
329 | |
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330 | static void noninvert(const struct optioninfo *oip) NONRETURNING; |
331 | static void noninvert(const struct optioninfo *oip) { |
332 | usageerr("option %s%s%s%s%s may not be inverted", |
333 | oip->sopt ? "-" : "", oip->sopt ? oip->sopt : "", |
334 | oip->lopt && oip->sopt ? " / " : "", |
335 | oip->lopt ? "--" : "", oip->lopt ? oip->lopt : ""); |
336 | } |
337 | |
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338 | void opt_do(const struct optioninfo *oip, int invert, |
339 | const char *arg, const char *arg2) { |
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340 | switch (oip->type) { |
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341 | case ot_flag: |
342 | assert(!arg); |
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343 | *oip->storep= !invert; |
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344 | return; |
345 | case ot_value: |
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346 | assert(!arg); |
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347 | if (invert) noninvert(oip); |
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348 | *oip->storep= oip->value; |
349 | return; |
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350 | case ot_func: case ot_funcarg: case ot_funcarg2: |
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351 | if (invert) noninvert(oip); |
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352 | oip->func(oip,arg,arg2); |
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353 | return; |
354 | default: |
355 | abort(); |
356 | } |
357 | } |