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parser.c
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parser.c
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/**
* parser.c -- web log parsing
* ______ ___
* / ____/___ / | _____________ __________
* / / __/ __ \/ /| |/ ___/ ___/ _ \/ ___/ ___/
* / /_/ / /_/ / ___ / /__/ /__/ __(__ |__ )
* \____/\____/_/ |_\___/\___/\___/____/____/
*
* The MIT License (MIT)
* Copyright (c) 2009-2016 Gerardo Orellana <hello @ goaccess.io>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* "_XOPEN_SOURCE" is required for the GNU libc to export "strptime(3)"
* correctly.
*/
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#define _FILE_OFFSET_BITS 64
#define _XOPEN_SOURCE 700
#include <ctype.h>
#include <errno.h>
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <arpa/inet.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#ifdef HAVE_LIBTOKYOCABINET
#include "tcabdb.h"
#include "tcbtdb.h"
#else
#include "gkhash.h"
#endif
#ifdef HAVE_GEOLOCATION
#include "geoip1.h"
#endif
#include "parser.h"
#include "browsers.h"
#include "goaccess.h"
#include "error.h"
#include "opesys.h"
#include "util.h"
#include "xmalloc.h"
/* private prototypes */
/* key/data generators for each module */
static int gen_visitor_key (GKeyData * kdata, GLogItem * logitem);
static int gen_404_key (GKeyData * kdata, GLogItem * logitem);
static int gen_browser_key (GKeyData * kdata, GLogItem * logitem);
static int gen_host_key (GKeyData * kdata, GLogItem * logitem);
static int gen_keyphrase_key (GKeyData * kdata, GLogItem * logitem);
static int gen_os_key (GKeyData * kdata, GLogItem * logitem);
static int gen_vhost_key (GKeyData * kdata, GLogItem * logitem);
static int gen_remote_user_key (GKeyData * kdata, GLogItem * logitem);
static int gen_referer_key (GKeyData * kdata, GLogItem * logitem);
static int gen_ref_site_key (GKeyData * kdata, GLogItem * logitem);
static int gen_request_key (GKeyData * kdata, GLogItem * logitem);
static int gen_static_request_key (GKeyData * kdata, GLogItem * logitem);
static int gen_status_code_key (GKeyData * kdata, GLogItem * logitem);
static int gen_visit_time_key (GKeyData * kdata, GLogItem * logitem);
#ifdef HAVE_GEOLOCATION
static int gen_geolocation_key (GKeyData * kdata, GLogItem * logitem);
#endif
/* insertion routines */
static void insert_data (int data_nkey, const char *data, GModule module);
static void insert_rootmap (int root_nkey, const char *root, GModule module);
/* insertion metric routines */
static void insert_hit (int data_nkey, GModule module);
static void insert_visitor (int uniq_nkey, GModule module);
static void insert_bw (int data_nkey, uint64_t size, GModule module);
static void insert_cumts (int data_nkey, uint64_t ts, GModule module);
static void insert_maxts (int data_nkey, uint64_t ts, GModule module);
static void insert_method (int data_nkey, const char *method, GModule module);
static void insert_protocol (int data_nkey, const char *proto, GModule module);
static void insert_agent (int data_nkey, int agent_nkey, GModule module);
/* *INDENT-OFF* */
static GParse paneling[] = {
{
VISITORS,
gen_visitor_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
}, {
REQUESTS,
gen_request_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
insert_method,
insert_protocol,
NULL,
}, {
REQUESTS_STATIC,
gen_static_request_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
insert_method,
insert_protocol,
NULL,
}, {
NOT_FOUND,
gen_404_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
insert_method,
insert_protocol,
NULL,
}, {
HOSTS,
gen_host_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
insert_agent,
}, {
OS,
gen_os_key,
insert_data,
insert_rootmap,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
insert_method,
insert_protocol,
NULL,
}, {
BROWSERS,
gen_browser_key,
insert_data,
insert_rootmap,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
}, {
REFERRERS,
gen_referer_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
}, {
REFERRING_SITES,
gen_ref_site_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
}, {
KEYPHRASES,
gen_keyphrase_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
},
#ifdef HAVE_GEOLOCATION
{
GEO_LOCATION,
gen_geolocation_key,
insert_data,
insert_rootmap,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
},
#endif
{
STATUS_CODES,
gen_status_code_key,
insert_data,
insert_rootmap,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
}, {
VISIT_TIMES,
gen_visit_time_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
}, {
VIRTUAL_HOSTS,
gen_vhost_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
}, {
REMOTE_USER,
gen_remote_user_key,
insert_data,
NULL,
insert_hit,
insert_visitor,
insert_bw,
insert_cumts,
insert_maxts,
NULL,
NULL,
NULL,
},
};
/* *INDENT-ON* */
/* Initialize a new GKeyData instance */
static void
new_modulekey (GKeyData * kdata)
{
GKeyData key = {
.data = NULL,
.data_key = NULL,
.data_nkey = 0,
.root = NULL,
.root_key = NULL,
.root_nkey = 0,
.uniq_key = NULL,
.uniq_nkey = 0,
};
*kdata = key;
}
/* Get a panel from the GParse structure given a module.
*
* On error, or if not found, NULL is returned.
* On success, the panel value is returned. */
static GParse *
panel_lookup (GModule module)
{
int i, num_panels = ARRAY_SIZE (paneling);
for (i = 0; i < num_panels; i++) {
if (paneling[i].module == module)
return &paneling[i];
}
return NULL;
}
/* Allocate memory for a new GRawData instance.
*
* On success, the newly allocated GRawData is returned . */
GRawData *
new_grawdata (void)
{
GRawData *raw_data = xmalloc (sizeof (*raw_data));
memset (raw_data, 0, sizeof *raw_data);
return raw_data;
}
/* Allocate memory for a new GRawDataItem instance.
*
* On success, the newly allocated GRawDataItem is returned . */
GRawDataItem *
new_grawdata_item (unsigned int size)
{
GRawDataItem *item = xcalloc (size, sizeof (*item));
return item;
}
#ifdef HAVE_LIBTOKYOCABINET
/* This is due to an additional allocation on tokyo's value
* retrieval :( on tcadbget() */
static void
free_raw_data_str_value (GRawData * raw_data)
{
int i = 0;
char *str = NULL;
for (i = 0; i < raw_data->size; ++i) {
str = raw_data->items[i].value.svalue;
if (str)
free (str);
}
}
#endif
/* Free memory allocated for a GRawData and GRawDataItem instance. */
void
free_raw_data (GRawData * raw_data)
{
#ifdef HAVE_LIBTOKYOCABINET
if (raw_data->type == STRING)
free_raw_data_str_value (raw_data);
#endif
free (raw_data->items);
free (raw_data);
}
/* Reset an instance of GLog structure. */
void
reset_struct (GLog * glog)
{
glog->invalid = 0;
glog->processed = 0;
glog->resp_size = 0LL;
glog->valid = 0;
}
/* Allocate memory for a new GLog instance.
*
* On success, the newly allocated GLog is returned . */
GLog *
init_log (void)
{
GLog *glog = xmalloc (sizeof (GLog));
memset (glog, 0, sizeof *glog);
return glog;
}
/* Initialize a new GLogItem instance.
*
* On success, the new GLogItem instance is returned. */
GLogItem *
init_log_item (GLog * glog)
{
GLogItem *logitem;
glog->items = xmalloc (sizeof (GLogItem));
logitem = glog->items;
memset (logitem, 0, sizeof *logitem);
logitem->agent = NULL;
logitem->browser = NULL;
logitem->browser_type = NULL;
logitem->continent = NULL;
logitem->country = NULL;
logitem->date = NULL;
logitem->errstr = NULL;
logitem->host = NULL;
logitem->keyphrase = NULL;
logitem->method = NULL;
logitem->os = NULL;
logitem->os_type = NULL;
logitem->protocol = NULL;
logitem->qstr = NULL;
logitem->ref = NULL;
logitem->req_key = NULL;
logitem->req = NULL;
logitem->resp_size = 0LL;
logitem->serve_time = 0;
logitem->status = NULL;
logitem->time = NULL;
logitem->uniq_key = NULL;
logitem->vhost = NULL;
logitem->userid = NULL;
memset (logitem->site, 0, sizeof (logitem->site));
return logitem;
}
/* Free all members of a GLogItem */
static void
free_glog (GLogItem * logitem)
{
if (logitem->agent != NULL)
free (logitem->agent);
if (logitem->browser != NULL)
free (logitem->browser);
if (logitem->browser_type != NULL)
free (logitem->browser_type);
if (logitem->continent != NULL)
free (logitem->continent);
if (logitem->country != NULL)
free (logitem->country);
if (logitem->date != NULL)
free (logitem->date);
if (logitem->errstr != NULL)
free (logitem->errstr);
if (logitem->host != NULL)
free (logitem->host);
if (logitem->keyphrase != NULL)
free (logitem->keyphrase);
if (logitem->method != NULL)
free (logitem->method);
if (logitem->os != NULL)
free (logitem->os);
if (logitem->os_type != NULL)
free (logitem->os_type);
if (logitem->protocol != NULL)
free (logitem->protocol);
if (logitem->qstr != NULL)
free (logitem->qstr);
if (logitem->ref != NULL)
free (logitem->ref);
if (logitem->req_key != NULL)
free (logitem->req_key);
if (logitem->req != NULL)
free (logitem->req);
if (logitem->status != NULL)
free (logitem->status);
if (logitem->time != NULL)
free (logitem->time);
if (logitem->uniq_key != NULL)
free (logitem->uniq_key);
if (logitem->userid != NULL)
free (logitem->userid);
if (logitem->vhost != NULL)
free (logitem->vhost);
free (logitem);
}
/* Decodes the given URL-encoded string.
*
* On success, the decoded string is assigned to the output buffer. */
#define B16210(x) (((x) >= '0' && (x) <= '9') ? ((x) - '0') : (toupper((x)) - 'A' + 10))
static void
decode_hex (char *url, char *out)
{
char *ptr;
const char *c;
for (c = url, ptr = out; *c; c++) {
if (*c != '%' || !isxdigit (c[1]) || !isxdigit (c[2])) {
*ptr++ = *c;
} else {
*ptr++ = (B16210 (c[1]) * 16) + (B16210 (c[2]));
c += 2;
}
}
*ptr = 0;
}
/* Entry point to decode the given URL-encoded string.
*
* On success, the decoded trimmed string is assigned to the output
* buffer. */
static char *
decode_url (char *url)
{
char *out, *decoded;
if ((url == NULL) || (*url == '\0'))
return NULL;
out = decoded = xstrdup (url);
decode_hex (url, out);
/* double encoded URL? */
if (conf.double_decode)
decode_hex (decoded, out);
strip_newlines (out);
return trim_str (out);
}
/* Process keyphrases from Google search, cache, and translate.
* Note that the referer hasn't been decoded at the entry point
* since there could be '&' within the search query.
*
* On error, 1 is returned.
* On success, the extracted keyphrase is assigned and 0 is returned. */
static int
extract_keyphrase (char *ref, char **keyphrase)
{
char *r, *ptr, *pch, *referer;
int encoded = 0;
if (!(strstr (ref, "http://www.google.")) &&
!(strstr (ref, "http://webcache.googleusercontent.com/")) &&
!(strstr (ref, "http://translate.googleusercontent.com/")) &&
!(strstr (ref, "https://www.google.")) &&
!(strstr (ref, "https://webcache.googleusercontent.com/")) &&
!(strstr (ref, "https://translate.googleusercontent.com/")))
return 1;
/* webcache.googleusercontent */
if ((r = strstr (ref, "/+&")) != NULL)
return 1;
/* webcache.googleusercontent */
else if ((r = strstr (ref, "/+")) != NULL)
r += 2;
/* webcache.googleusercontent */
else if ((r = strstr (ref, "q=cache:")) != NULL) {
pch = strchr (r, '+');
if (pch)
r += pch - r + 1;
}
/* www.google.* or translate.googleusercontent */
else if ((r = strstr (ref, "&q=")) != NULL ||
(r = strstr (ref, "?q=")) != NULL)
r += 3;
else if ((r = strstr (ref, "%26q%3D")) != NULL ||
(r = strstr (ref, "%3Fq%3D")) != NULL)
encoded = 1, r += 7;
else
return 1;
if (!encoded && (ptr = strchr (r, '&')) != NULL)
*ptr = '\0';
else if (encoded && (ptr = strstr (r, "%26")) != NULL)
*ptr = '\0';
referer = decode_url (r);
if (referer == NULL || *referer == '\0')
return 1;
referer = char_replace (referer, '+', ' ');
*keyphrase = trim_str (referer);
return 0;
}
#ifdef HAVE_GEOLOCATION
/* Extract geolocation for the given host.
*
* On error, 1 is returned.
* On success, the extracted continent and country are set and 0 is
* returned. */
static int
extract_geolocation (GLogItem * logitem, char *continent, char *country)
{
if (!is_geoip_resource ())
return 1;
geoip_get_country (logitem->host, country, logitem->type_ip);
geoip_get_continent (logitem->host, continent, logitem->type_ip);
return 0;
}
#endif
/* Parse a URI and extracts the *host* part from it
* i.e., //www.example.com/path?googleguy > www.example.com
*
* On error, 1 is returned.
* On success, the extracted referer is set and 0 is returned. */
static int
extract_referer_site (const char *referer, char *host)
{
char *url, *begin, *end;
int len = 0;
if ((referer == NULL) || (*referer == '\0'))
return 1;
url = strdup (referer);
if ((begin = strstr (url, "//")) == NULL)
goto clean;
begin += 2;
if ((len = strlen (begin)) == 0)
goto clean;
if ((end = strchr (begin, '/')) != NULL)
len = end - begin;
if (len == 0)
goto clean;
if (len >= REF_SITE_LEN)
len = REF_SITE_LEN;
memcpy (host, begin, len);
host[len] = '\0';
free (url);
return 0;
clean:
free (url);
return 1;
}
/* Determine if the given request is static (e.g., jpg, css, js, etc).
*
* On error, or if not static, 0 is returned.
* On success, the 1 is returned. */
static int
verify_static_content (char *req)
{
char *nul = req + strlen (req);
const char *ext = NULL, *pch = NULL;
int elen = 0, i;
if (strlen (req) < conf.static_file_max_len)
return 0;
for (i = 0; i < conf.static_file_idx; ++i) {
ext = conf.static_files[i];
if (ext == NULL || *ext == '\0')
continue;
elen = strlen (ext);
if (conf.all_static_files && (pch = strchr (req, '?')) != NULL &&
pch - req > elen) {
pch -= elen;
if (0 == strncasecmp (ext, pch, elen))
return 1;
continue;
}
if (!strncasecmp (nul - elen, ext, elen))
return 1;
}
return 0;
}
/* Extract the HTTP method.
*
* On error, or if not found, NULL is returned.
* On success, the HTTP method is returned. */
static const char *
extract_method (const char *token)
{
const char *lookfor = NULL;
if ((lookfor = "OPTIONS", !strncmp (token, lookfor, 7)) ||
(lookfor = "GET", !strncmp (token, lookfor, 3)) ||
(lookfor = "HEAD", !strncmp (token, lookfor, 4)) ||
(lookfor = "POST", !strncmp (token, lookfor, 4)) ||
(lookfor = "PUT", !strncmp (token, lookfor, 3)) ||
(lookfor = "DELETE", !strncmp (token, lookfor, 6)) ||
(lookfor = "TRACE", !strncmp (token, lookfor, 5)) ||
(lookfor = "CONNECT", !strncmp (token, lookfor, 7)) ||
(lookfor = "PATCH", !strncmp (token, lookfor, 5)) ||
(lookfor = "options", !strncmp (token, lookfor, 7)) ||
(lookfor = "get", !strncmp (token, lookfor, 3)) ||
(lookfor = "head", !strncmp (token, lookfor, 4)) ||
(lookfor = "post", !strncmp (token, lookfor, 4)) ||
(lookfor = "put", !strncmp (token, lookfor, 3)) ||
(lookfor = "delete", !strncmp (token, lookfor, 6)) ||
(lookfor = "trace", !strncmp (token, lookfor, 5)) ||
(lookfor = "connect", !strncmp (token, lookfor, 7)) ||
(lookfor = "patch", !strncmp (token, lookfor, 5)) ||
/* WebDAV */
(lookfor = "PROPFIND", !strncmp (token, lookfor, 8)) ||
(lookfor = "PROPPATCH", !strncmp (token, lookfor, 9)) ||
(lookfor = "MKCOL", !strncmp (token, lookfor, 5)) ||
(lookfor = "COPY", !strncmp (token, lookfor, 4)) ||
(lookfor = "MOVE", !strncmp (token, lookfor, 4)) ||
(lookfor = "LOCK", !strncmp (token, lookfor, 4)) ||
(lookfor = "UNLOCK", !strncmp (token, lookfor, 6)) ||
(lookfor = "VERSION-CONTROL", !strncmp (token, lookfor, 15)) ||
(lookfor = "REPORT", !strncmp (token, lookfor, 6)) ||
(lookfor = "CHECKOUT", !strncmp (token, lookfor, 8)) ||
(lookfor = "CHECKIN", !strncmp (token, lookfor, 7)) ||
(lookfor = "UNCHECKOUT", !strncmp (token, lookfor, 10)) ||
(lookfor = "MKWORKSPACE", !strncmp (token, lookfor, 11)) ||
(lookfor = "UPDATE", !strncmp (token, lookfor, 6)) ||
(lookfor = "LABEL", !strncmp (token, lookfor, 5)) ||
(lookfor = "MERGE", !strncmp (token, lookfor, 5)) ||
(lookfor = "BASELINE-CONTROL", !strncmp (token, lookfor, 16)) ||
(lookfor = "MKACTIVITY", !strncmp (token, lookfor, 10)) ||
(lookfor = "ORDERPATCH", !strncmp (token, lookfor, 10)) ||
(lookfor = "propfind", !strncmp (token, lookfor, 8)) ||
(lookfor = "propwatch", !strncmp (token, lookfor, 9)) ||
(lookfor = "mkcol", !strncmp (token, lookfor, 5)) ||
(lookfor = "copy", !strncmp (token, lookfor, 4)) ||
(lookfor = "move", !strncmp (token, lookfor, 4)) ||
(lookfor = "lock", !strncmp (token, lookfor, 4)) ||
(lookfor = "unlock", !strncmp (token, lookfor, 6)) ||
(lookfor = "version-control", !strncmp (token, lookfor, 15)) ||
(lookfor = "report", !strncmp (token, lookfor, 6)) ||
(lookfor = "checkout", !strncmp (token, lookfor, 8)) ||
(lookfor = "checkin", !strncmp (token, lookfor, 7)) ||
(lookfor = "uncheckout", !strncmp (token, lookfor, 10)) ||
(lookfor = "mkworkspace", !strncmp (token, lookfor, 11)) ||
(lookfor = "update", !strncmp (token, lookfor, 6)) ||
(lookfor = "label", !strncmp (token, lookfor, 5)) ||
(lookfor = "merge", !strncmp (token, lookfor, 5)) ||
(lookfor = "baseline-control", !strncmp (token, lookfor, 16)) ||
(lookfor = "mkactivity", !strncmp (token, lookfor, 10)) ||
(lookfor = "orderpatch", !strncmp (token, lookfor, 10)))
return lookfor;
return NULL;
}
/* Determine if time-served data was stored on-disk. */
static void
contains_usecs (void)
{
if (conf.serve_usecs)
return;
#ifdef TCB_BTREE
ht_insert_genstats ("serve_usecs", 1);
#endif
conf.serve_usecs = 1; /* flag */
}
/* Determine if the given token is a valid HTTP protocol.
*
* If not valid, 1 is returned.
* If valid, 0 is returned. */
static int
invalid_protocol (const char *token)
{
const char *lookfor;
return !((lookfor = "HTTP/1.0", !strncmp (token, lookfor, 8)) ||
(lookfor = "HTTP/1.1", !strncmp (token, lookfor, 8)) ||
(lookfor = "HTTP/2", !strncmp (token, lookfor, 6)));
}
/* Parse a request containing the method and protocol.
*
* On error, or unable to parse, NULL is returned.
* On success, the HTTP request is returned and the method and
* protocol are assigned to the corresponding buffers. */
static char *
parse_req (char *line, char **method, char **protocol)
{
char *req = NULL, *request = NULL, *proto = NULL, *dreq = NULL;
const char *meth;
ptrdiff_t rlen;
meth = extract_method (line);
/* couldn't find a method, so use the whole request line */
if (meth == NULL) {
request = xstrdup (line);
}
/* method found, attempt to parse request */
else {
req = line + strlen (meth);
if ((proto = strstr (line, " HTTP/1.0")) == NULL &&
(proto = strstr (line, " HTTP/1.1")) == NULL &&
(proto = strstr (line, " HTTP/2")) == NULL) {
return alloc_string ("-");
}
req++;
if ((rlen = proto - req) <= 0)
return alloc_string ("-");
request = xmalloc (rlen + 1);
strncpy (request, req, rlen);
request[rlen] = 0;
if (conf.append_method)
(*method) = strtoupper (xstrdup (meth));
if (conf.append_protocol)
(*protocol) = strtoupper (xstrdup (++proto));
}
if ((dreq = decode_url (request)) && dreq != '\0') {
free (request);
return dreq;
}
return request;
}
/* Extract the next delimiter given a log format and copy the
* delimiter(s) to the destination buffer.
* Note that it's possible to store up to two delimiters.
*
* On error, the function returns.
* On success, the delimiter(s) are stored in the dest buffer and the
* number of extra delimiters is returned. */
static int
get_delim (char *dest, const char *p)
{
/* done, nothing to do */
if (p[0] == '\0' || p[1] == '\0') {
dest[0] = '\0';
return 0;
}
/* add the first delim */
dest[0] = *(p + 1);
/* check if there's another possible delim */
if (p[2] == '|' && p[3] != '\0') {
dest[1] = *(p + 3);
return 1;
}
return 0;
}
/* Extract and malloc a token given the parsed rule.
*
* On success, the malloc'd token is returned. */
static char *
parsed_string (const char *pch, char **str, int move_ptr)
{
char *p;
size_t len = (pch - *str + 1);
p = xmalloc (len);
memcpy (p, *str, (len - 1));
p[len - 1] = '\0';
if (move_ptr)
*str += len - 1;
return trim_str (p);
}
/* Find and extract a token given a log format rule.
*
* On error, or unable to parse it, NULL is returned.
* On success, the malloc'd token is returned. */
static char *
parse_string (char **str, const char *delims, int cnt)
{
int idx = 0;
char *pch = *str, *p = NULL;
char end;
if ((*delims != 0x0) && (p = strpbrk (*str, delims)) == NULL)
return NULL;
end = !*delims ? 0x0 : *p;
do {
/* match number of delims */
if (*pch == end)
idx++;
/* delim found, parse string then */
if ((*pch == end && cnt == idx) || *pch == '\0')
return parsed_string (pch, str, 1);
/* advance to the first unescaped delim */
if (*pch == '\\')
pch++;
} while (*pch++);
return NULL;
}
/* Move forward through the log string until a non-space (!isspace)
* char is found. */
static void
find_alpha (char **str)
{
char *s = *str;
while (*s) {
if (isspace (*s))
s++;
else
break;
}
*str += s - *str;
}
/* Format the broken-down time tm to a numeric date format.
*
* On error, or unable to format the given tm, 1 is returned.
* On success, a malloc'd format is returned. */
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
static int
set_date (char **fdate, struct tm tm)
{
char buf[DATE_LEN] = ""; /* Ymd */
memset (buf, 0, sizeof (buf));
if (strftime (buf, DATE_LEN, conf.date_num_format, &tm) <= 0)
return 1;
*fdate = xstrdup (buf);
return 0;
}
/* Determine the parsing specifier error and construct a message out
* of it.
*
* On success, a malloc'd error message is assigned to the log
* structure and 1 is returned. */
static int
spec_err (GLogItem * logitem, int code, const char spec, const char *tkn)
{
char *err = NULL;
const char *fmt = NULL;
switch (code) {
case SPEC_TOKN_INV:
fmt = "Token '%s' doesn't match specifier '%%%c'";
err = xmalloc (snprintf (NULL, 0, fmt, (tkn ? tkn : "-"), spec) + 1);
sprintf (err, fmt, (tkn ? tkn : "-"), spec);
break;
case SPEC_TOKN_SET:
fmt = "Token already set for '%%%c' specifier.";
err = xmalloc (snprintf (NULL, 0, fmt, spec) + 1);
sprintf (err, fmt, spec);
break;
case SPEC_TOKN_NUL:
fmt = "Token for '%%%c' specifier is NULL.";
err = xmalloc (snprintf (NULL, 0, fmt, spec) + 1);
sprintf (err, fmt, spec);
break;
case SPEC_SFMT_MIS:
fmt = "Missing braces '%s' and ignore chars for specifier '%%%c'";
err = xmalloc (snprintf (NULL, 0, fmt, (tkn ? tkn : "-"), spec) + 1);
sprintf (err, fmt, (tkn ? tkn : "-"), spec);
break;
}
logitem->errstr = err;
return 1;