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dnsdbq.c
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dnsdbq.c
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/*
* Copyright (c) 2014-2021 by Farsight Security, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* External. */
/* asprintf() does not appear on linux without this */
#define _GNU_SOURCE
/* gettimeofday() does not appear on linux without this. */
#define _BSD_SOURCE
/* modern glibc will complain about the above if it doesn't see this. */
#define _DEFAULT_SOURCE
#include <sys/wait.h>
#include <sys/time.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <wordexp.h>
/* Types. */
#define MAIN_PROGRAM
#include "asinfo.h"
#include "defs.h"
#include "netio.h"
#include "pdns.h"
#include "sort.h"
#include "time.h"
#include "tokstr.h"
#include "globals.h"
#undef MAIN_PROGRAM
#define QPARAM_GETOPT "A:B:L:l:O:cgG"
/* Forward. */
static void help(void);
static void qdesc_debug(const char *, qdesc_ct);
static void qparam_debug(const char *, qparam_ct);
static __attribute__((noreturn)) void usage(const char *, ...);
static bool parse_long(const char *, long *);
static void set_timeout(const char *, const char *);
static const char *qparam_ready(qparam_t);
static const char *qparam_option(int, const char *, qparam_t);
static verb_ct find_verb(const char *);
static char *select_config(void);
static void do_batch(FILE *, qparam_ct);
static const char *batch_options(const char *, qparam_t, qparam_ct);
static const char *batch_parse(char *, qdesc_t);
static char *makepath(qdesc_ct);
static query_t query_launcher(qdesc_ct, qparam_ct, writer_t);
static const char *rrtype_correctness(const char *);
static void launch_fetch(query_t, const char *, pdns_fence_ct);
static void ruminate_json(int, qparam_ct);
static const char *lookup_ok(void);
static const char *summarize_ok(void);
static const char *check_7bit(const char *);
/* Constants. */
static const char * const conf_files[] = {
"~/.isc-dnsdb-query.conf",
"~/.dnsdb-query.conf",
"/etc/isc-dnsdb-query.conf",
"/etc/dnsdb-query.conf",
NULL
};
const struct presenter pres_text_lookup = { present_text_lookup, true };
const struct presenter pres_json_lookup = { present_json_lookup, true };
const struct presenter pres_csv_lookup = { present_csv_lookup, true };
const struct presenter pres_minimal_lookup = { present_minimal_lookup, false };
const struct presenter pres_text_summarize = { present_text_summarize, true };
const struct presenter pres_json_summarize = { present_json_summarize, true };
const struct presenter pres_csv_summarize = { present_csv_summarize, true };
const struct verb verbs[] = {
/* note: element [0] of this array is the DEFAULT_VERB. */
{ "lookup", "/lookup", lookup_ok,
&pres_text_lookup,
&pres_json_lookup,
&pres_csv_lookup,
&pres_minimal_lookup },
{ "summarize", "/summarize", summarize_ok,
&pres_text_summarize,
&pres_json_summarize,
&pres_csv_summarize,
NULL },
{ NULL, NULL, NULL, NULL, NULL, NULL, NULL }
};
/* Private. */
static size_t ideal_buffer;
static bool allow_8bit = false;
/* Public. */
int
main(int argc, char *argv[]) {
struct qdesc qd = { .mode = no_mode };
struct qparam qp = qparam_empty;
char *picked_system = NULL;
bool info = false;
int json_fd = -1;
const char *msg;
char *value;
int ch;
/* global dynamic initialization. */
ideal_buffer = 4 * (size_t) sysconf(_SC_PAGESIZE);
gettimeofday(&startup_time, NULL);
if ((program_name = strrchr(argv[0], '/')) == NULL)
program_name = argv[0];
else
program_name++;
if ((value = getenv(env_time_fmt)) != NULL &&
strcasecmp(value, "iso") == 0)
iso8601 = true;
if ((value = getenv(env_config_file)) != NULL)
config_file = strdup(value);
if ((value = getenv(env_timeout)) != NULL)
set_timeout(value, env_timeout);
pverb = &verbs[DEFAULT_VERB];
/* process the command line options. */
while ((ch = getopt(argc, argv,
"C:D:R:r:N:n:i:M:u:p:t:b:k:J:V:T:0:o:"
"adfhIjmqSsUv468" QPARAM_GETOPT))
!= -1)
{
switch (ch) {
/* keep these in-sync with QPARAM_GETOPT. */
case 'A': case 'B': case 'c':
case 'g': case 'G':
case 'l': case 'L':
case 'O':
if ((msg = qparam_option(ch, optarg, &qp)) != NULL)
usage(msg);
break;
case '0': {
const char *equal = strchr(optarg, '=');
if (equal == NULL)
usage("-0 requires 'function='");
size_t length = (size_t) (equal - optarg);
const char *thing = optarg + length + 1;
if (strncmp(optarg, "countoff", length) == 0) {
struct counted *c = countoff(thing);
countoff_debug("main", thing, c);
DESTROY(c);
} else {
usage("-0 function unrecognized");
}
my_exit(0);
}
case 'a':
asinfo_lookup = true;
break;
case 'C':
cookie_file = strdup(optarg);
break;
case 'D':
asinfo_domain = optarg;
break;
case 'R': {
if (qd.mode != no_mode)
usage("-r, -n, -i, -N, or -R "
"can only appear once");
assert(qd.thing == NULL);
qd.mode = raw_rrset_mode;
const char *p = strchr(optarg, '/');
if (p != NULL) {
if (qd.rrtype != NULL ||
qd.bailiwick != NULL)
usage("if -b or -t are specified then "
"-R cannot contain a slash");
const char *q = strchr(p + 1, '/');
if (q != NULL) {
qd.bailiwick = strdup(q + 1);
qd.rrtype = strndup(p + 1, (size_t)
(q - p - 1));
} else {
qd.rrtype = strdup(p + 1);
}
qd.thing = strndup(optarg,
(size_t)(p - optarg));
} else {
qd.thing = strdup(optarg);
}
break;
}
case 'r': {
if (qd.mode != no_mode)
usage("-r, -n, -i, -N, or -R "
"can only appear once");
assert(qd.thing == NULL);
qd.mode = rrset_mode;
const char *p = strchr(optarg, '/');
if (p != NULL) {
if (qd.rrtype != NULL ||
qd.bailiwick != NULL)
usage("if -b or -t are specified then "
"-r cannot contain a slash");
const char *q = strchr(p + 1, '/');
if (q != NULL) {
qd.bailiwick = strdup(q + 1);
qd.rrtype = strndup(p + 1, (size_t)
(q - p - 1));
} else {
qd.rrtype = strdup(p + 1);
}
qd.thing = strndup(optarg,
(size_t)(p - optarg));
} else {
qd.thing = strdup(optarg);
}
break;
}
case 'N': {
if (qd.mode != no_mode)
usage("-r, -n, -i, -N, or -R "
"can only appear once");
assert(qd.thing == NULL);
qd.mode = raw_name_mode;
const char *p = strchr(optarg, '/');
if (p != NULL) {
if (qd.rrtype != NULL ||
qd.bailiwick != NULL)
usage("if -b or -t are specified then "
"-N cannot contain a slash");
const char *q = strchr(p + 1, '/');
if (q != NULL) {
qd.bailiwick = strdup(q + 1);
qd.rrtype = strndup(p + 1, (size_t)
(q - p - 1));
} else {
qd.rrtype = strdup(p + 1);
}
qd.thing = strndup(optarg,
(size_t)(p - optarg));
} else {
qd.thing = strdup(optarg);
}
break;
}
case 'n': {
if (qd.mode != no_mode)
usage("-r, -n, -i, -N, or -R "
"can only appear once");
assert(qd.thing == NULL);
qd.mode = name_mode;
const char *p = strchr(optarg, '/');
if (p != NULL) {
if (qd.rrtype != NULL ||
qd.bailiwick != NULL)
usage("if -b or -t are specified then "
"-n cannot contain a slash");
const char *q = strchr(p + 1, '/');
if (q != NULL) {
qd.bailiwick = strdup(q + 1);
qd.rrtype = strndup(p + 1, (size_t)
(q - p - 1));
} else {
qd.rrtype = strdup(p + 1);
}
qd.thing = strndup(optarg,
(size_t)(p - optarg));
} else {
qd.thing = strdup(optarg);
}
break;
}
case 'i': {
if (qd.mode != no_mode)
usage("-r, -n, -i, -N, or -R "
"can only appear once");
assert(qd.thing == NULL);
qd.mode = ip_mode;
const char *p = strchr(optarg, '/');
if (p != NULL) {
qd.thing = strndup(optarg,
(size_t)(p - optarg));
qd.pfxlen = strdup(p + 1);
} else {
qd.thing = strdup(optarg);
}
break;
}
case 'V': {
pverb = find_verb(optarg);
if (pverb == NULL)
usage("Unsupported verb for -V argument");
break;
}
case 'M':
if (!parse_long(optarg, &max_count) ||
(max_count <= 0))
usage("-M must be positive");
break;
case 'o':
set_timeout(optarg, "-o");
break;
case 'u':
picked_system = strdup(optarg);
break;
case 'U':
donotverify = true;
break;
case 'p':
if (strcasecmp(optarg, "json") == 0)
presentation = pres_json;
else if (strcasecmp(optarg, "csv") == 0)
presentation = pres_csv;
else if (strcasecmp(optarg, "text") == 0 ||
strcasecmp(optarg, "dns") == 0)
presentation = pres_text;
else if (strcasecmp(optarg, "minimal") == 0)
presentation = pres_minimal;
else
usage("-p must specify "
"json, text, csv, or minimal");
DESTROY(presentation_name);
presentation_name = strdup(optarg);
break;
case 't':
if (qd.rrtype != NULL)
usage("can only specify rrtype(s) once");
qd.rrtype = strdup(optarg);
break;
case 'b':
if (qd.bailiwick != NULL)
usage("can only specify bailiwick one way");
qd.bailiwick = strdup(optarg);
break;
case 'k': {
if (sorting == no_sort)
usage("-k must be preceded by -s or -S");
struct tokstr *ts = tokstr_string(optarg);
for (char *tok;
(tok = tokstr_next(ts, ",")) != NULL;
free(tok))
{
if (find_sort_key(tok) != NULL)
usage("Each sort key may only be "
"specified once");
if ((msg = add_sort_key(tok)) != NULL)
usage(msg);
}
tokstr_last(&ts);
break;
}
case 'J':
if (strcmp(optarg, "-") == 0)
json_fd = STDIN_FILENO;
else
json_fd = open(optarg, O_RDONLY);
if (json_fd < 0)
my_panic(true, optarg);
break;
case 'd':
debug_level++;
break;
case 'j':
presentation = pres_json;
DESTROY(presentation_name);
presentation_name = strdup("json");
break;
case 'f':
switch (batching) {
case batch_none:
batching = batch_terse;
break;
case batch_terse:
batching = batch_verbose;
break;
case batch_verbose:
/* FALLTHROUGH */
default:
usage("too many -f options");
}
break;
case 'T': {
struct tokstr *ts = tokstr_string(optarg);
for (char *token;
(token = tokstr_next(ts, ",")) != NULL;
free(token))
{
if (strcasecmp(token, "reverse") == 0)
transforms |= TRANS_REVERSE;
else if (strcasecmp(token, "datefix") == 0)
transforms |= TRANS_DATEFIX;
else if (strcasecmp(token, "chomp") == 0)
transforms |= TRANS_CHOMP;
else if (strcasecmp(token, "qdetail") == 0)
transforms |= TRANS_QDETAIL;
else {
usage("unrecognized transform in -T");
}
}
tokstr_last(&ts);
break;
}
case 'm':
multiple = true;
break;
case 's':
sorting = normal_sort;
break;
case 'S':
sorting = reverse_sort;
break;
case 'I':
info = true;
break;
case 'v':
printf("%s: version %s\n", program_name, id_version);
my_exit(0);
case 'q':
quiet = true;
break;
case 'h':
help();
my_exit(0);
case '4':
curl_ipresolve = CURL_IPRESOLVE_V4;
break;
case '6':
curl_ipresolve = CURL_IPRESOLVE_V6;
break;
case '8':
allow_8bit = true;
break;
default:
usage("unrecognized option");
}
}
argc -= optind;
if (argc != 0)
usage("there are no non-option arguments to this program");
argv = NULL;
if (allow_8bit == false && batching == batch_none &&
(qd.mode == name_mode || qd.mode == rrset_mode))
{
msg = check_7bit(qd.thing);
if (msg != NULL)
usage(msg);
}
if (asinfo_lookup) {
#ifdef CRIPPLED_LIBC
usage("the -a option requires a modern functional C library.");
#else
if (!asinfo_domain_exists(asinfo_domain)) {
my_logf("ASINFO domain (%s) does not exist",
asinfo_domain);
my_exit(1);
}
#endif
}
if (presentation == pres_none) {
presentation = pres_text;
assert(presentation_name == NULL);
presentation_name = strdup("text");
}
if (presentation == pres_minimal)
minimal_deduper = deduper_new(minimal_modulus);
if ((msg = qparam_ready(&qp)) != NULL)
usage(msg);
/* optionally dump program options as interpreted. */
if (debug_level >= 1) {
qdesc_debug("main", &qd);
qparam_debug("main", &qp);
debug(true, "batching=%d, multiple=%d\n",
batching != false, multiple != false);
}
/* select presenter. */
switch (presentation) {
case pres_text:
presenter = pverb->text;
break;
case pres_json:
presenter = pverb->json;
break;
case pres_csv:
presenter = pverb->csv;
break;
case pres_minimal:
presenter = pverb->minimal;
break;
case pres_none:
/* FALLTHROUGH */
default:
abort();
}
assert(presentation != pres_none);
assert(presentation_name != NULL);
if (presenter == NULL) {
char *errmsg = NULL;
int x = asprintf(&errmsg,
"that verb (%s) has no presenter for \"%s\"",
pverb->name, presentation_name);
if (x < 0)
my_panic(true, "asprintf");
usage(errmsg);
}
if (presentation != pres_json && (transforms & TRANS_QDETAIL) != 0)
usage("'-T qdetail' currently requires '-j' or '-p json'");
/* get to final readiness; in particular, get psys set. */
if (sorting != no_sort) {
if (!presenter->sortable) {
char *errmsg = NULL;
int x = asprintf(&errmsg,
"that presentation format (%s) "
"cannot be sorted",
presentation_name);
if (x < 0)
my_panic(true, "asprintf");
usage(errmsg);
}
if ((transforms & TRANS_QDETAIL) != 0)
usage("\"-T qdetail\" is incompatible with sorting");
sort_ready();
}
if (config_file == NULL)
config_file = select_config();
if (picked_system != NULL) {
psys_specified = true;
pick_system(picked_system, "-u option");
DESTROY(picked_system);
} else {
pick_system(DEFAULT_SYS, "default system");
psys_specified = true;
}
if (json_fd != -1) {
#if WANT_PDNS_DNSDB
/* the json output files are in COF format, never SAF. */
if (strcmp(psys->name, "dnsdb2") == 0)
pick_system("dnsdb1", "downgrade for -J");
#endif
NULL;
} else {
make_curl();
assert(psys_specified);
}
/* validate some interrelated options. */
if (multiple && batching == batch_none)
usage("using -m without -f makes no sense.");
if ((msg = (*pverb->ok)()) != NULL)
usage(msg);
if ((msg = psys->verb_ok(pverb->name, &qp)) != NULL)
usage(msg);
/* get some input from somewhere, and use it to drive our output. */
if (json_fd != -1) {
/* read a JSON file. */
if (qd.mode != no_mode)
usage("can't mix -n, -r, -i, or -R with -J");
if (batching != batch_none)
usage("can't mix -f with -J");
if (qd.bailiwick != NULL)
usage("can't mix -b with -J");
if (info)
usage("can't mix -I with -J");
if (qd.rrtype != NULL)
usage("can't mix -t with -J");
if (pverb != &verbs[DEFAULT_VERB])
usage("can't mix -V with -J");
if (max_count > 0)
usage("can't mix -M with -J");
if (qp.gravel)
usage("can't mix -g with -J");
if (qp.offset != 0)
usage("can't mix -O with -J");
ruminate_json(json_fd, &qp);
close(json_fd);
} else if (batching != batch_none) {
/* drive via a batch file. */
if (qd.mode != no_mode)
usage("can't mix -n, -r, -i, or -R with -f");
if (qd.bailiwick != NULL)
usage("can't mix -b with -f");
if (qd.rrtype != NULL)
usage("can't mix -t with -f");
if (info)
usage("can't mix -I with -f");
do_batch(stdin, &qp);
} else if (info) {
/* use the "info" verb. */
if (qd.mode != no_mode)
usage("can't mix -n, -r, -i, or -R with -I");
if (presentation != pres_text && presentation != pres_json)
usage("info must be presented in json or text format");
if (qd.bailiwick != NULL)
usage("can't mix -b with -I");
if (qd.rrtype != NULL)
usage("can't mix -t with -I");
if (psys->info == NULL)
usage("there is no 'info' for this service");
psys->info();
} else {
/* do a LHS or RHS lookup of some kind. */
if (qd.mode == no_mode)
usage("must specify -r, -n, -i, or -R"
" unless -f or -J is used");
if (qd.bailiwick != NULL) {
if (qd.mode == ip_mode)
usage("can't mix -b with -i");
if (qd.mode == raw_rrset_mode)
usage("can't mix -b with -R");
if (qd.mode == raw_name_mode)
usage("can't mix -b with -N");
if (qd.mode == name_mode)
usage("can't mix -b with -n");
}
if (qd.mode == ip_mode && qd.rrtype != NULL)
usage("can't mix -i with -t");
writer_t writer = writer_init(qp.output_limit,
ps_stdout, false);
(void) query_launcher(&qd, &qp, writer);
io_engine(0);
writer_fini(writer);
writer = NULL;
}
if (json_fd == -1) {
unmake_curl();
}
/* clean up and go home. */
DESTROY(qd.thing);
DESTROY(qd.rrtype);
DESTROY(qd.bailiwick);
DESTROY(qd.pfxlen);
my_exit(exit_code);
}
/* my_exit -- close or destroy global objects, then exit.
*/
__attribute__((noreturn)) void
my_exit(int code) {
DESTROY(presentation_name);
/* deduper state if any can be trashed. */
if (minimal_deduper != NULL)
deduper_destroy(&minimal_deduper);
/* writers and readers which are still known, must be freed. */
unmake_writers();
/* if curl is operating, it must be shut down. */
unmake_curl();
/* globals which may have been initialized, are to be freed. */
DESTROY(config_file);
DESTROY(cookie_file);
if (psys != NULL)
psys->destroy();
/* sort key specifications and computations, are to be freed. */
sort_destroy();
#ifndef CRIPPLED_LIBC
/* asinfo logic has an internal DNS resolver context. */
asinfo_shutdown();
#endif
/* terminate process. */
DEBUG(1, true, "about to call exit(%d)\n", code);
exit(code);
}
/* my_panic -- display an error on diagnostic output stream, exit ungracefully
*/
__attribute__((noreturn)) void
my_panic(bool want_perror, const char *s) {
my_logf("panic (%s): ", s,
want_perror ? strerror(errno) : "generic");
my_exit(1);
}
/* Private. */
/* help -- display a brief usage-help text; then exit.
*
* this goes to stdout since we can expect it not to be piped unless to $PAGER.
*/
static void
help(void) {
verb_ct v;
printf("usage: %s [-acdfGghIjmqSsUv468] [-p dns|json|csv|minimal]\n",
program_name);
puts("\t[-u SYSTEM] [-V VERB] [-0 FUNCTION=INPUT]\n"
"\t[-k (first|last|duration|count|name|type|data)[,...]]\n"
"\t[-l QUERY-LIMIT] [-L OUTPUT-LIMIT]\n"
"\t[-O OFFSET] [-M MAX_COUNT]\n"
"\t[-A AFTER] [-B BEFORE]\n"
"\t[-D ASINFO_DOMAIN] [-T (datefix|reverse|chomp|qdetail)[,...] {\n"
"\t\t-f |\n"
"\t\t-J INPUTFILE |\n"
"\t\t[-t RRTYPE[,...]] [-b BAILIWICK] {\n"
"\t\t\t-r OWNER[/RRTYPE[,...][/BAILIWICK]] |\n"
"\t\t\t-n NAME[/RRTYPE[,...]] |\n"
"\t\t\t-i IP[/PFXLEN] |\n"
"\t\t\t-N RAW-NAME-DATA[/RRTYPE[,...]]\n"
"\t\t\t-R RAW-OWNER-DATA[/RRTYPE[,...][/BAILIWICK]]\n"
"\t\t}\n"
"\t}");
printf("for -A and -B, use absolute format YYYY-MM-DD[ HH:MM:SS],\n"
"\tor relative format %%dw%%dd%%dh%%dm%%ds.\n"
"use -a to get ASNs associated with reported IP addresses\n"
"use -c to get complete (strict) time matching for -A and -B.\n"
"for -D, the default is \"%s\"\n"
"use -d one or more times to ramp up the diagnostic output.\n"
"for -0, the function must be \"countoff\"\n"
"for -f, stdin must contain lines of the following forms:\n"
"\trrset/name/NAME[/RRTYPE[,...][/BAILIWICK]]\n"
"\trrset/raw/HEX-PAIRS[/RRTYPE[,...][/BAILIWICK]]\n"
"\trdata/name/NAME[/RRTYPE[,...]]\n"
"\trdata/ip/ADDR[,PFXLEN]\n"
"\trdata/raw/HEX-PAIRS[/RRTYPE[,...]]\n"
"\t(output format will depend on -p or -j, framed by '--'.)\n"
"\t(with -ff, framing will be '++ $cmd', '-- $stat ($code)'.\n"
"use -g to get graveled results (default is -G, rocks).\n"
"use -h to reliably display this helpful text.\n"
"use -I to see a system-specific account/key summary.\n"
"for -J, input format is newline-separated JSON, "
"as from -j output.\n"
"use -j as a synonym for -p json.\n"
"use -M # to end a summarize op when count exceeds threshold.\n"
"use -m with -f for multiple upstream queries in single result.\n"
"use -m with -f -f for multiple upstream queries out of order.\n"
"use -O # to skip this many results in what is returned.\n"
"use -q for warning reticence.\n"
"use -s to sort in ascending order, "
"or -S for descending order.\n"
"\t-s/-S can be repeated before several -k arguments.\n"
"for -T, transforms are datefix, reverse, chomp, and qdetail.\n"
"use -U to turn off SSL certificate verification.\n"
"use -v to show the program version.\n"
"use -4 to force connecting to the server via IPv4.\n"
"use -6 to force connecting to the server via IPv6.\n"
"use -8 to allow 8-bit values in -r and -n arguments.\n",
asinfo_domain);
puts("for -u, system must be one of:");
#if WANT_PDNS_DNSDB
puts("\tdnsdb");
puts("\tdnsdb2");
#endif
#if WANT_PDNS_CIRCL
puts("\tcircl");
#endif
puts("for -V, verb must be one of:");
for (v = verbs; v->name != NULL; v++)
printf("\t%s\n", v->name);
puts("\nGetting Started:\n"
"\tAdd your API key to ~/.dnsdb-query.conf like this:\n"
"\t\tDNSDB_API_KEY=\"YOURAPIKEYHERE\"");
printf("\nTry man %s for full documentation.\n", program_name);
}
/* qdesc_debug -- dump a qdesc.
*/
static void
qdesc_debug(const char *where, qdesc_ct qdp) {
debug(true, "qdesc(%s)[", where);
const char *sep = "\040";
if (qdp->mode != no_mode) {
debug(false, "%smo %d", sep, (int)qdp->mode);
sep = ",\040";
}
if (qdp->thing != NULL) {
debug(false, "%sth '%s'", sep, qdp->thing);
sep = ",\040";
}
if (qdp->rrtype != NULL) {
debug(false, "%srr '%s'", sep, qdp->rrtype);
sep = ",\040";
}
if (qdp->bailiwick != NULL) {
debug(false, "%sbw '%s'", sep, qdp->bailiwick);
sep = ",\040";
}
if (qdp->pfxlen != NULL) {
debug(false, "%spfx '%s'", sep, qdp->pfxlen);
sep = ",\040";
}
debug(false, " ]\n");
}
/* qparam_debug -- dump a qparam.
*/
static void
qparam_debug(const char *where, qparam_ct qpp) {
debug(true, "qparam(%s)[", where);
const char *sep = "\040";
if (qpp->after != 0) {
debug(false, "%s-A%ld(%s)",
sep, qpp->after, time_str(qpp->after, false));
sep = "\n\t";
}
if (qpp->before != 0) {
debug(false, "%s-B%ld(%s)",
sep, qpp->before, time_str(qpp->before, false));
sep = "\n\t";
}
if (qpp->query_limit != -1) {
debug(false, "%s-l%ld", sep, qpp->query_limit);
sep = "\040";
}
if (qpp->output_limit != -1) {
debug(false, "%s-L%ld", sep, qpp->output_limit);
sep = "\040";
}
if (qpp->complete) {
debug(false, "%s-c", sep);
sep = "\040";
}
if (qpp->gravel) {
debug(false, "%s-g", sep);
sep = "\040";
}
debug(false, "\040]\n");
}
/* usage -- display a usage error message, brief usage help text; then exit.
*
* this goes to stderr in case stdout has been piped or redirected.
*/
static __attribute__((noreturn)) void
usage(const char *fmtstr, ...) {
va_list ap;
va_start(ap, fmtstr);
fputs("error: ", stderr);
vfprintf(stderr, fmtstr, ap);
va_end(ap);
fputs("\n\n", stderr);
fprintf(stderr,
"try %s -h for a short description of program usage.\n",
program_name);
my_exit(1);
}
/* parse_long -- parse a base 10 long value.
*
* Return true if ok, else return false.
*/
static bool
parse_long(const char *in, long *out) {
char *ep;
long result;
/* "The strtol() function shall not change the setting of errno
* if successful." (IEEE Std 1003.1, 2004 Edition)
*/
errno = 0;
result = strtol(in, &ep, 10);
if ((errno == ERANGE && (result == LONG_MAX || result == LONG_MIN)) ||
(errno != 0 && result == 0) ||
(ep == in))
return false;
*out = result;
return true;
}
/* set_timeout -- ingest a setting for curl_timeout
*
* exits through usage() if the value is invalid.
*/
static void
set_timeout(const char *value, const char *source) {
if (!parse_long(value, &curl_timeout) || (curl_timeout < 0))
usage("%s must be non-negative", source);
}
/* qparam_ready -- check and possibly adjust the contents of a qparam.
*/
static const char *
qparam_ready(qparam_t qpp) {
if (qpp->output_limit == -1 && qpp->query_limit != -1 && !multiple)
qpp->output_limit = qpp->query_limit;
if (qpp->complete && qpp->after != 0 && qpp->before != 0) {
if (qpp->after > qpp->before)
return "-A value must be before -B value"
" if using complete time matching";
}
if (qpp->complete && qpp->after == 0 && qpp->before == 0)
return "-c without -A or -B makes no sense.";
return NULL;
}
/* qparam_option -- process one command line option related to a qparam
*/
static const char *
qparam_option(int opt, const char *arg, qparam_t qpp) {
switch (opt) {
case 'A':
if (!time_get(arg, &qpp->after) || qpp->after == 0UL)
return "bad -A timestamp";
break;
case 'B':
if (!time_get(arg, &qpp->before) || qpp->before == 0UL)
return "bad -B timestamp";
break;
case 'c':
qpp->complete = true;
break;
case 'g':
qpp->gravel = true;
break;
case 'G':
qpp->gravel = false;
break;
case 'l':
if (!parse_long(arg, &qpp->query_limit) ||
(qpp->query_limit < 0))
return "-l must be zero or positive";
break;
case 'L':
if (!parse_long(arg, &qpp->output_limit) ||
(qpp->output_limit <= 0))
return "-L must be positive";
qpp->explicit_output_limit = qpp->output_limit;
break;
case 'O':
if (!parse_long(optarg, &qpp->offset) ||
(qpp->offset < 0))
return "-O must be zero or positive";
break;
}
return NULL;
}
/* lookup_ok -- validate command line options for 'lookup'.
*/
static const char *
lookup_ok(void) {
/* TODO too many local variables would need to be global to check
* more here.
*/
if (max_count > 0)
return "max_count is not allowed for the lookup verb";
return NULL;
}