📄 adh-opts.c
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/*
* adh-opts.c
* - useful general-purpose resolver client program
* option handling tables etc.
*/
/*
* This file is
* Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
*
* It is part of adns, which is
* Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
* Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef ADNS_JGAA_WIN32
# include "adns_win32.h"
#endif
#include "adnshost.h"
int ov_env=1, ov_pipe=0, ov_asynch=0;
int ov_verbose= 0;
adns_rrtype ov_type= adns_r_none;
int ov_search=0, ov_qc_query=0, ov_qc_anshost=0, ov_qc_cname=1;
int ov_tcp=0, ov_cname=0, ov_format=fmt_default;
char *ov_id= 0;
struct perqueryflags_remember ov_pqfr = { 1,1,1, tm_none };
static const struct optioninfo global_options[]= {
{ ot_desconly, "global binary options:" },
{ ot_flag, "Do not look at environment variables at all",
"e", "env", &ov_env, 0 },
{ ot_flag, "Read queries on stdin instead of using args",
"f", "pipe", &ov_pipe, 1 },
{ ot_flag, "Allow answers to be reordered",
"a", "asynch", &ov_asynch, 1 },
{ ot_desconly, "answer/error output format and destination (see below):" },
{ ot_value, "Answers to stdout, errors as messages to stderr (default)",
"Fs", "fmt-simple", &ov_format, fmt_simple },
{ ot_value, "Answers and errors both to stdout in parseable format",
"Fi", "fmt-inline", &ov_format, fmt_inline },
{ ot_value, "Fully-parseable output format (default for --asynch)",
"Fa", "fmt-asynch", &ov_format, fmt_asynch },
{ ot_desconly, "global verbosity level:" },
{ ot_value, "Do not print anything to stderr",
"Vq", "quiet", &ov_verbose, adns_if_noerrprint },
{ ot_value, "Report unexpected kinds of problem only (default)",
"Vn", "no-quiet", &ov_verbose, 0 },
{ ot_value, "Debugging mode",
"Vd", "debug", &ov_verbose, adns_if_debug },
{ ot_desconly, "other global options:" },
{ ot_funcarg, "Configuration to use instead of /etc/resolv.conf",
0, "config", 0,0, of_config, "<config-text>" },
{ ot_func, "Print version number",
0, "version", 0,0, of_version },
{ ot_func, "Print usage information",
0, "help", 0,0, of_help },
{ ot_end }
};
static const struct optioninfo perquery_options[]= {
{ ot_desconly, "per-query options:" },
{ ot_funcarg, "Query type (see below)",
"t", "type", 0,0, &of_type, "type" },
{ ot_funcarg, "Do reverse query (address -> name lookup)",
"i", "ptr", 0,0, &of_ptr, "addr" },
{ ot_funcarg2, "Lookup in in-addr-like `zone' (eg MAPS RBL)",
0, "reverse", 0,0, &of_reverse, "addr","zone" },
{ ot_desconly, "per-query binary options:" },
{ ot_flag, "Use the search list",
"s", "search", &ov_search, 1 },
{ ot_flag, "Let query domains contain quote-requiring chars",
"Qq", "qc-query", &ov_qc_query, 1 },
{ ot_flag, "Let hostnames in answers contain ...",
"Qa", "qc-anshost", &ov_qc_anshost, 1 },
{ ot_flag, "Prevent CNAME target domains from containing ...",
"Qc", "qc-cname", &ov_qc_cname, 0 },
{ ot_flag, "Force use of a virtual circuit",
"u", "tcp", &ov_tcp, 1 },
{ ot_flag, "Do not display owner name in output",
"Do", "show-owner", &ov_pqfr.show_owner, 0 },
{ ot_flag, "Do not display RR type in output",
"Dt", "show-type", &ov_pqfr.show_type, 0 },
{ ot_flag, "Do not display CNAME target in output",
"Dc", "show-cname", &ov_pqfr.show_cname, 0 },
{ ot_desconly, "per-query TTL mode (NB TTL is minimum across all info in reply):" },
{ ot_value, "Show the TTL as a TTL",
"Tt", "ttl-ttl", &ov_pqfr.ttl, tm_rel },
{ ot_value, "Show the TTL as a time_t when the data might expire",
"Ta", "ttl-abs", &ov_pqfr.ttl, tm_abs },
{ ot_value, "Do not show the TTL (default)",
"Tn", "no-ttl", &ov_pqfr.ttl, tm_none },
{ ot_desconly, "per-query CNAME handling mode:" },
{ ot_value, "Call it an error if a CNAME is found",
"Cf", "cname-reject", &ov_cname, adns_qf_cname_forbid },
{ ot_value, "Allow references to CNAMEs in other RRs",
"Cl", "cname-loose", &ov_cname, adns_qf_cname_loose },
{ ot_value, "CNAME ok for query domain, but not in RRs (default)",
"Cs", "cname-ok", &ov_cname, 0 },
{ ot_desconly, "asynchronous/pipe mode options:" },
{ ot_funcarg, "Set <id>, default is decimal sequence starting 0",
0, "asynch-id", 0,0, &of_asynch_id, "id" },
{ ot_funcarg, "Cancel the query with id <id> (no error if not found)",
0, "cancel-id", 0,0, &of_cancel_id, "id" },
{ ot_end }
};
static void printusage(void) {
static const struct optioninfo *const all_optiontables[]= {
global_options, perquery_options, 0
};
const struct optioninfo *const *oiap, *oip=0;
int maxsopt, maxlopt, l;
maxsopt= maxlopt= 0;
for (oiap=all_optiontables; *oiap; oiap++) {
for (oip=*oiap; oip->type != ot_end; oip++) {
if (oip->type == ot_funcarg) continue;
if (oip->sopt) { l= strlen(oip->sopt); if (l>maxsopt) maxsopt= l; }
if (oip->lopt) {
l= strlen(oip->lopt);
if (oip->type == ot_flag && !oip->value) l+= 3;
if (l>maxlopt) maxlopt= l;
}
}
}
fputs("usage: adnshost [global-opts] [query-opts] query-domain\n"
" [[query-opts] query-domain ...]\n"
" adnshost [global-opts] [query-opts] -f|--pipe\n",
stdout);
for (oiap=all_optiontables; *oiap; oiap++) {
putchar('\n');
for (oip=*oiap; oip->type != ot_end; oip++) {
switch (oip->type) {
case ot_flag:
if (!oip->value) {
if (oip->sopt) {
printf(" +%-*s --no-%-*s %s\n",
maxsopt, oip->sopt,
maxlopt-2, oip->lopt,
oip->desc);
} else {
printf(" --no-%-*s %s\n",
maxlopt+maxsopt+1, oip->lopt,
oip->desc);
}
break;
}
case ot_value: case ot_func: /* fall through */
if (oip->sopt) {
printf(" -%-*s --%-*s %s\n",
maxsopt, oip->sopt,
maxlopt+1, oip->lopt,
oip->desc);
} else {
printf(" --%-*s %s\n",
maxlopt+maxsopt+3, oip->lopt,
oip->desc);
}
break;
case ot_funcarg:
if (oip->sopt) {
l= (maxlopt + maxsopt - 9 -
(strlen(oip->sopt) + strlen(oip->lopt) + 2*strlen(oip->argdesc)));
printf(" -%s<%s> / --%s <%s>%*s%s\n",
oip->sopt, oip->argdesc, oip->lopt, oip->argdesc,
l>2 ? l : 2, "",
oip->desc);
} else {
l= (maxlopt + maxsopt + 1 -
(strlen(oip->lopt) + strlen(oip->argdesc)));
printf(" --%s <%s>%*s%s\n",
oip->lopt, oip->argdesc,
l>2 ? l : 2, "",
oip->desc);
}
break;
case ot_funcarg2:
assert(!oip->sopt);
l= (maxlopt + maxsopt - 2 -
(strlen(oip->lopt) + strlen(oip->argdesc) + strlen(oip->argdesc2)));
printf(" --%s <%s> <%s>%*s%s\n",
oip->lopt, oip->argdesc, oip->argdesc2,
l>2 ? l : 2, "",
oip->desc);
break;
case ot_desconly:
printf("%s\n", oip->desc);
break;
default:
abort();
}
}
}
printf("\nEscaping domains which might start with `-':\n"
" - %-*s Next argument is a domain, but more options may follow\n",
maxlopt+maxsopt+3, "<domain>");
fputs("\n"
"Query domains should always be quoted according to master file format.\n"
"\n"
"For binary options, --FOO and --no-FOO are opposites, as are\n"
"-X and +X. In each case the default is the one not listed.\n"
"Per query options stay set a particular way until they are reset,\n"
"whether they appear on the command line or on stdin.\n"
"All global options must preceed the first query domain.\n"
"\n"
"With -f, the input should be lines with either an option, possibly\n"
"with a value argument (separated from the option by a space if it's a long\n"
"option), or a domain (possibly preceded by a hyphen and a space to\n"
"distinguish it from an option).\n"
"\n"
"Output format is master file format without class or TTL by default:\n"
" [<owner>] [<ttl>] [<type>] <data>\n"
"or if the <owner> domain refers to a CNAME and --show-cname is on\n"
" [<owner>] [<ttl>] CNAME <cname>\n"
" [<cname>] [<ttl>] <type> <data>\n"
"When a query fails you get an error message to stderr (with --fmt-simple).\n"
"Specify --fmt-inline for lines like this (broken here for readability):\n"
" ; failed <statustype> <statusnum> <statusabbrev> \\\n"
" [<owner>] [<ttl>] [<cname>] \"<status string>\"\n"
"If you use --fmt-asynch, which is the default for --asynch,\n"
"each answer (success or failure) is preceded by a line\n"
" <id> <nrrs> <statustype> <statusnum> <statusabbrev> \\\n"
" [<owner>] [<ttl>] [<cname>] \"<status string>\"\n"
"where <nrrs> is the number of RRs that follow and <cname> will be `$' or\n"
"the CNAME target; the CNAME indirection and error formats above are not used.\n"
"\n"
"Exit status:\n"
" 0 all went well\n"
" 1-6 at least one query failed with statustype:\n"
" 1 localfail )\n"
" 2 remotefail ) temporary errors\n"
" 3 tempfail __)_________________\n"
" 4 misconfig )\n"
" 5 misquery ) permanent errors\n"
" 6 permfail )\n"
" 10 system trouble\n"
" 11 usage problems\n"
"\n"
"Query types (see adns.h; default is addr):\n"
" ns soa ptr mx rp addr - enhanced versions\n"
" cname hinfo txt - types with only one version\n"
" a ns- soa- ptr- mx- rp- - _raw versions\n"
"Default is addr, or ptr for -i/--ptr queries\n",
stdout);
if (ferror(stdout)) sysfail("write usage message",errno);
}
void of_version(const struct optioninfo *oi, const char *arg, const char *arg2) {
VERSION_PRINT_QUIT("adnshost");
}
void of_help(const struct optioninfo *oi, const char *arg, const char *arg2) {
printusage();
if (fclose(stdout)) sysfail("finish writing output",errno);
quitnow(0);
}
typedef int comparer_type(const char **optp, const struct optioninfo *entry);
static int oc_long(const char **optp, const struct optioninfo *entry) {
return entry->lopt && !strcmp(*optp,entry->lopt);
}
static int oc_short(const char **optp, const struct optioninfo *entry) {
const char *sopt;
int l;
sopt= entry->sopt;
if (!sopt) return 0;
l= strlen(sopt);
if (memcmp(*optp,sopt,l)) return 0;
(*optp) += l;
return 1;
}
static const struct optioninfo *find1(const char **optp,
const struct optioninfo *table,
comparer_type *comparer) {
for (;;) {
if (table->type == ot_end) return 0;
if (comparer(optp,table)) return table;
table++;
}
}
static const struct optioninfo *find(const char **optp,
const char *prefix,
comparer_type *comparer) {
const struct optioninfo *oip;
const char *opt;
opt= *optp;
oip= find1(optp,perquery_options,comparer);
if (oip) return oip;
oip= find1(optp,global_options,comparer);
if (!oip) usageerr("unknown option %s%s",prefix,opt);
if (ads) usageerr("global option %s%s specified after query domain(s)",prefix,opt);
return oip;
}
const struct optioninfo *opt_findl(const char *opt) { return find(&opt,"--",oc_long); }
const struct optioninfo *opt_finds(const char **optp) { return find(optp,"-",oc_short); }
static void noninvert(const struct optioninfo *oip) NONRETURNING;
static void noninvert(const struct optioninfo *oip) {
usageerr("option %s%s%s%s%s may not be inverted",
oip->sopt ? "-" : "", oip->sopt ? oip->sopt : "",
oip->lopt && oip->sopt ? " / " : "",
oip->lopt ? "--" : "", oip->lopt ? oip->lopt : "");
}
void opt_do(const struct optioninfo *oip, int invert,
const char *arg, const char *arg2) {
switch (oip->type) {
case ot_flag:
assert(!arg);
*oip->storep= !invert;
return;
case ot_value:
assert(!arg);
if (invert) noninvert(oip);
*oip->storep= oip->value;
return;
case ot_func: case ot_funcarg: case ot_funcarg2:
if (invert) noninvert(oip);
oip->func(oip,arg,arg2);
return;
default:
abort();
}
}
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