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Diffstat (limited to '')
| -rw-r--r-- | modules/loggers/mod_log_config.c | 1857 |
1 files changed, 1857 insertions, 0 deletions
diff --git a/modules/loggers/mod_log_config.c b/modules/loggers/mod_log_config.c new file mode 100644 index 0000000..5d5b73a --- /dev/null +++ b/modules/loggers/mod_log_config.c @@ -0,0 +1,1857 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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. + */ + +/* + * Modified by djm@va.pubnix.com: + * If no TransferLog is given explicitly, decline to log. + * + * This is module implements the TransferLog directive (same as the + * common log module), and additional directives, LogFormat and CustomLog. + * + * + * Syntax: + * + * TransferLog fn Logs transfers to fn in standard log format, unless + * a custom format is set with LogFormat + * LogFormat format Set a log format from TransferLog files + * CustomLog fn format + * Log to file fn with format given by the format + * argument + * + * There can be any number of TransferLog and CustomLog + * commands. Each request will be logged to _ALL_ the + * named files, in the appropriate format. + * + * If no TransferLog or CustomLog directive appears in a VirtualHost, + * the request will be logged to the log file(s) defined outside + * the virtual host section. If a TransferLog or CustomLog directive + * appears in the VirtualHost section, the log files defined outside + * the VirtualHost will _not_ be used. This makes this module compatible + * with the CLF and config log modules, where the use of TransferLog + * inside the VirtualHost section overrides its use outside. + * + * Examples: + * + * TransferLog logs/access_log + * <VirtualHost> + * LogFormat "... custom format ..." + * TransferLog log/virtual_only + * CustomLog log/virtual_useragents "%t %{user-agent}i" + * </VirtualHost> + * + * This will log using CLF to access_log any requests handled by the + * main server, while any requests to the virtual host will be logged + * with the "... custom format..." to virtual_only _AND_ using + * the custom user-agent log to virtual_useragents. + * + * Note that the NCSA referer and user-agent logs are easily added with + * CustomLog: + * CustomLog logs/referer "%{referer}i -> %U" + * CustomLog logs/agent "%{user-agent}i" + * + * RefererIgnore functionality can be obtained with conditional + * logging (SetEnvIf and CustomLog ... env=!VAR). + * + * But using this method allows much easier modification of the + * log format, e.g. to log hosts along with UA: + * CustomLog logs/referer "%{referer}i %U %h" + * + * The argument to LogFormat and CustomLog is a string, which can include + * literal characters copied into the log files, and '%' directives as + * follows: + * + * %...B: bytes sent, excluding HTTP headers. + * %...b: bytes sent, excluding HTTP headers in CLF format, i.e. a '-' + * when no bytes where sent (rather than a '0'. + * %...{FOOBAR}C: The contents of the HTTP cookie FOOBAR + * %...{FOOBAR}e: The contents of the environment variable FOOBAR + * %...f: filename + * %...h: remote host + * %...a: remote IP-address + * %...A: local IP-address + * %...{Foobar}i: The contents of Foobar: header line(s) in the request + * sent to the client. + * %...k: number of keepalive requests served over this connection + * %...l: remote logname (from identd, if supplied) + * %...{Foobar}n: The contents of note "Foobar" from another module. + * %...{Foobar}o: The contents of Foobar: header line(s) in the reply. + * %...p: the canonical port for the server + * %...{format}p: the canonical port for the server, or the actual local + * or remote port + * %...P: the process ID of the child that serviced the request. + * %...{format}P: the process ID or thread ID of the child/thread that + * serviced the request + * %...r: first line of request + * %...s: status. For requests that got internally redirected, this + * is status of the *original* request --- %...>s for the last. + * %...t: time, in common log format time format + * %...{format}t: The time, in the form given by format, which should + * be in strftime(3) format. + * %...T: the time taken to serve the request, in seconds. + * %...{s}T: the time taken to serve the request, in seconds, same as %T. + * %...{us}T: the time taken to serve the request, in micro seconds, same as %D. + * %...{ms}T: the time taken to serve the request, in milliseconds. + * %...D: the time taken to serve the request, in micro seconds. + * %...u: remote user (from auth; may be bogus if return status (%s) is 401) + * %...U: the URL path requested. + * %...v: the configured name of the server (i.e. which virtual host?) + * %...V: the server name according to the UseCanonicalName setting + * %...m: the request method + * %...H: the request protocol + * %...q: the query string prepended by "?", or empty if no query string + * %...X: Status of the connection. + * 'X' = connection aborted before the response completed. + * '+' = connection may be kept alive after the response is sent. + * '-' = connection will be closed after the response is sent. + * (This directive was %...c in late versions of Apache 1.3, but + * this conflicted with the historical ssl %...{var}c syntax.) + * %...L: Log-Id of the Request (or '-' if none) + * %...{c}L: Log-Id of the Connection (or '-' if none) + * + * The '...' can be nothing at all (e.g. "%h %u %r %s %b"), or it can + * indicate conditions for inclusion of the item (which will cause it + * to be replaced with '-' if the condition is not met). Note that + * there is no escaping performed on the strings from %r, %...i and + * %...o; some with long memories may remember that I thought this was + * a bad idea, once upon a time, and I'm still not comfortable with + * it, but it is difficult to see how to "do the right thing" with all + * of '%..i', unless we URL-escape everything and break with CLF. + * + * The forms of condition are a list of HTTP status codes, which may + * or may not be preceded by '!'. Thus, '%400,501{User-agent}i' logs + * User-agent: on 400 errors and 501 errors (Bad Request, Not + * Implemented) only; '%!200,304,302{Referer}i' logs Referer: on all + * requests which did *not* return some sort of normal status. + * + * The default LogFormat reproduces CLF; see below. + * + * The way this is supposed to work with virtual hosts is as follows: + * a virtual host can have its own LogFormat, or its own TransferLog. + * If it doesn't have its own LogFormat, it inherits from the main + * server. If it doesn't have its own TransferLog, it writes to the + * same descriptor (meaning the same process for "| ..."). + * + * --- rst */ + +#include "apr_strings.h" +#include "apr_lib.h" +#include "apr_hash.h" +#include "apr_optional.h" +#include "apr_anylock.h" + +#define APR_WANT_STRFUNC +#include "apr_want.h" + +#include "ap_config.h" +#include "mod_log_config.h" +#include "httpd.h" +#include "http_config.h" +#include "http_core.h" /* For REMOTE_NAME */ +#include "http_log.h" +#include "http_protocol.h" +#include "util_time.h" +#include "ap_mpm.h" + +#if APR_HAVE_UNISTD_H +#include <unistd.h> +#endif +#ifdef HAVE_LIMITS_H +#include <limits.h> +#endif + +#define DEFAULT_LOG_FORMAT "%h %l %u %t \"%r\" %>s %b" + +module AP_MODULE_DECLARE_DATA log_config_module; + + +static int xfer_flags = (APR_WRITE | APR_APPEND | APR_CREATE | APR_LARGEFILE); +static apr_fileperms_t xfer_perms = APR_OS_DEFAULT; +static apr_hash_t *log_hash; +static apr_status_t ap_default_log_writer(request_rec *r, + void *handle, + const char **strs, + int *strl, + int nelts, + apr_size_t len); +static apr_status_t ap_buffered_log_writer(request_rec *r, + void *handle, + const char **strs, + int *strl, + int nelts, + apr_size_t len); +static void *ap_default_log_writer_init(apr_pool_t *p, server_rec *s, + const char* name); +static void *ap_buffered_log_writer_init(apr_pool_t *p, server_rec *s, + const char* name); + +static ap_log_writer_init *ap_log_set_writer_init(ap_log_writer_init *handle); +static ap_log_writer *ap_log_set_writer(ap_log_writer *handle); +static ap_log_writer *log_writer = ap_default_log_writer; +static ap_log_writer_init *log_writer_init = ap_default_log_writer_init; +static int buffered_logs = 0; /* default unbuffered */ +static apr_array_header_t *all_buffered_logs = NULL; + +/* POSIX.1 defines PIPE_BUF as the maximum number of bytes that is + * guaranteed to be atomic when writing a pipe. And PIPE_BUF >= 512 + * is guaranteed. So we'll just guess 512 in the event the system + * doesn't have this. Now, for file writes there is actually no limit, + * the entire write is atomic. Whether all systems implement this + * correctly is another question entirely ... so we'll just use PIPE_BUF + * because it's probably a good guess as to what is implemented correctly + * everywhere. + */ +#ifdef PIPE_BUF +#define LOG_BUFSIZE PIPE_BUF +#else +#define LOG_BUFSIZE (512) +#endif + +/* + * multi_log_state is our per-(virtual)-server configuration. We store + * an array of the logs we are going to use, each of type config_log_state. + * If a default log format is given by LogFormat, store in default_format + * (backward compat. with mod_log_config). We also store for each virtual + * server a pointer to the logs specified for the main server, so that if this + * vhost has no logs defined, we can use the main server's logs instead. + * + * So, for the main server, config_logs contains a list of the log files + * and server_config_logs is empty. For a vhost, server_config_logs + * points to the same array as config_logs in the main server, and + * config_logs points to the array of logs defined inside this vhost, + * which might be empty. + */ + +typedef struct { + const char *default_format_string; + apr_array_header_t *default_format; + apr_array_header_t *config_logs; + apr_array_header_t *server_config_logs; + apr_table_t *formats; +} multi_log_state; + +/* + * config_log_state holds the status of a single log file. fname might + * be NULL, which means this module does no logging for this + * request. format might be NULL, in which case the default_format + * from the multi_log_state should be used, or if that is NULL as + * well, use the CLF. + * log_writer is NULL before the log file is opened and is + * set to a opaque structure (usually a fd) after it is opened. + + */ +typedef struct { + apr_file_t *handle; + apr_size_t outcnt; + char outbuf[LOG_BUFSIZE]; + apr_anylock_t mutex; +} buffered_log; + +typedef struct { + const char *fname; + const char *format_string; + apr_array_header_t *format; + void *log_writer; + char *condition_var; + int inherit; + ap_expr_info_t *condition_expr; + /** place of definition or NULL if already checked */ + const ap_directive_t *directive; +} config_log_state; + +/* + * log_request_state holds request specific log data that is not + * part of the request_rec. + */ +typedef struct { + apr_time_t request_end_time; +} log_request_state; + +/* + * Format items... + * Note that many of these could have ap_sprintfs replaced with static buffers. + */ + +typedef struct { + ap_log_handler_fn_t *func; + char *arg; + int condition_sense; + int want_orig; + apr_array_header_t *conditions; +} log_format_item; + +static char *pfmt(apr_pool_t *p, int i) +{ + if (i <= 0) { + return "-"; + } + else { + return apr_itoa(p, i); + } +} + +static const char *constant_item(request_rec *dummy, char *stuff) +{ + return stuff; +} + +static const char *log_remote_host(request_rec *r, char *a) +{ + const char *remote_host; + if (a && !strcmp(a, "c")) { + remote_host = ap_get_remote_host(r->connection, r->per_dir_config, + REMOTE_NAME, NULL); + } + else { + remote_host = ap_get_useragent_host(r, REMOTE_NAME, NULL); + } + return ap_escape_logitem(r->pool, remote_host); +} + +static const char *log_remote_address(request_rec *r, char *a) +{ + if (a && !strcmp(a, "c")) { + return r->connection->client_ip; + } + else { + return r->useragent_ip; + } +} + +static const char *log_local_address(request_rec *r, char *a) +{ + return r->connection->local_ip; +} + +static const char *log_remote_logname(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, ap_get_remote_logname(r)); +} + +static const char *log_remote_user(request_rec *r, char *a) +{ + char *rvalue = r->user; + + if (rvalue == NULL) { + rvalue = "-"; + } + else if (strlen(rvalue) == 0) { + rvalue = "\"\""; + } + else { + rvalue = ap_escape_logitem(r->pool, rvalue); + } + + return rvalue; +} + +static const char *log_request_line(request_rec *r, char *a) +{ + /* NOTE: If the original request contained a password, we + * re-write the request line here to contain XXXXXX instead: + * (note the truncation before the protocol string for HTTP/0.9 requests) + * (note also that r->the_request contains the unmodified request) + */ + return ap_escape_logitem(r->pool, + (r->parsed_uri.password) + ? apr_pstrcat(r->pool, r->method, " ", + apr_uri_unparse(r->pool, + &r->parsed_uri, 0), + r->assbackwards ? NULL : " ", + r->protocol, NULL) + : r->the_request); +} + +static const char *log_request_file(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, r->filename); +} +static const char *log_request_uri(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, r->uri); +} +static const char *log_request_method(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, r->method); +} +static const char *log_log_id(request_rec *r, char *a) +{ + if (a && !strcmp(a, "c")) { + return r->connection->log_id ? r->connection->log_id : "-"; + } + else { + return r->log_id ? r->log_id : "-"; + } +} +static const char *log_request_protocol(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, r->protocol); +} +static const char *log_request_query(request_rec *r, char *a) +{ + return (r->args) ? apr_pstrcat(r->pool, "?", + ap_escape_logitem(r->pool, r->args), NULL) + : ""; +} +static const char *log_status(request_rec *r, char *a) +{ + return pfmt(r->pool, r->status); +} + +static const char *log_handler(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, r->handler); +} + +static const char *clf_log_bytes_sent(request_rec *r, char *a) +{ + if (!r->sent_bodyct || !r->bytes_sent) { + return "-"; + } + else { + return apr_off_t_toa(r->pool, r->bytes_sent); + } +} + +static const char *log_bytes_sent(request_rec *r, char *a) +{ + if (!r->sent_bodyct || !r->bytes_sent) { + return "0"; + } + else { + return apr_off_t_toa(r->pool, r->bytes_sent); + } +} + + +static const char *log_header_in(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, apr_table_get(r->headers_in, a)); +} + +static const char *log_trailer_in(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, apr_table_get(r->trailers_in, a)); +} + + +static APR_INLINE char *find_multiple_headers(apr_pool_t *pool, + const apr_table_t *table, + const char *key) +{ + const apr_array_header_t *elts; + const apr_table_entry_t *t_elt; + const apr_table_entry_t *t_end; + apr_size_t len; + struct sle { + struct sle *next; + const char *value; + apr_size_t len; + } *result_list, *rp; + + elts = apr_table_elts(table); + + if (!elts->nelts) { + return NULL; + } + + t_elt = (const apr_table_entry_t *)elts->elts; + t_end = t_elt + elts->nelts; + len = 1; /* \0 */ + result_list = rp = NULL; + + do { + if (!ap_cstr_casecmp(t_elt->key, key)) { + if (!result_list) { + result_list = rp = apr_palloc(pool, sizeof(*rp)); + } + else { + rp = rp->next = apr_palloc(pool, sizeof(*rp)); + len += 2; /* ", " */ + } + + rp->next = NULL; + rp->value = t_elt->val; + rp->len = strlen(rp->value); + + len += rp->len; + } + ++t_elt; + } while (t_elt < t_end); + + if (result_list) { + char *result = apr_palloc(pool, len); + char *cp = result; + + rp = result_list; + while (rp) { + if (rp != result_list) { + *cp++ = ','; + *cp++ = ' '; + } + memcpy(cp, rp->value, rp->len); + cp += rp->len; + rp = rp->next; + } + *cp = '\0'; + + return result; + } + + return NULL; +} + +static const char *log_header_out(request_rec *r, char *a) +{ + const char *cp = NULL; + + if (!ap_cstr_casecmp(a, "Content-type") && r->content_type) { + cp = ap_field_noparam(r->pool, r->content_type); + } + else if (!ap_cstr_casecmp(a, "Set-Cookie")) { + cp = find_multiple_headers(r->pool, r->headers_out, a); + } + else { + cp = apr_table_get(r->headers_out, a); + } + + return ap_escape_logitem(r->pool, cp); +} + +static const char *log_trailer_out(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, apr_table_get(r->trailers_out, a)); +} + +static const char *log_note(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, apr_table_get(r->notes, a)); +} +static const char *log_env_var(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, apr_table_get(r->subprocess_env, a)); +} + +static const char *log_cookie(request_rec *r, char *a) +{ + const char *cookies_entry; + + /* + * This supports Netscape version 0 cookies while being tolerant to + * some properties of RFC2109/2965 version 1 cookies: + * - case-insensitive match of cookie names + * - white space between the tokens + * It does not support the following version 1 features: + * - quoted strings as cookie values + * - commas to separate cookies + */ + + if ((cookies_entry = apr_table_get(r->headers_in, "Cookie"))) { + char *cookie, *last1, *last2; + char *cookies = apr_pstrdup(r->pool, cookies_entry); + + while ((cookie = apr_strtok(cookies, ";", &last1))) { + char *name = apr_strtok(cookie, "=", &last2); + /* last2 points to the next char following an '=' delim, + or the trailing NUL char of the string */ + char *value = last2; + if (name && *name && value && *value) { + char *last = value - 2; + /* Move past leading WS */ + name += strspn(name, " \t"); + while (last >= name && apr_isspace(*last)) { + *last = '\0'; + --last; + } + + if (!ap_cstr_casecmp(name, a)) { + /* last1 points to the next char following the ';' delim, + or the trailing NUL char of the string */ + last = last1 - (*last1 ? 2 : 1); + /* Move past leading WS */ + value += strspn(value, " \t"); + while (last >= value && apr_isspace(*last)) { + *last = '\0'; + --last; + } + + return ap_escape_logitem(r->pool, value); + } + } + /* Iterate the remaining tokens using apr_strtok(NULL, ...) */ + cookies = NULL; + } + } + return NULL; +} + +static const char *log_request_time_custom(request_rec *r, char *a, + apr_time_exp_t *xt) +{ + apr_size_t retcode; + char tstr[MAX_STRING_LEN]; + apr_strftime(tstr, &retcode, sizeof(tstr), a, xt); + return apr_pstrdup(r->pool, tstr); +} + +#define DEFAULT_REQUEST_TIME_SIZE 32 +typedef struct { + unsigned t; + char timestr[DEFAULT_REQUEST_TIME_SIZE]; + unsigned t_validate; +} cached_request_time; + +#define TIME_FMT_CUSTOM 0 +#define TIME_FMT_CLF 1 +#define TIME_FMT_ABS_SEC 2 +#define TIME_FMT_ABS_MSEC 3 +#define TIME_FMT_ABS_USEC 4 +#define TIME_FMT_ABS_MSEC_FRAC 5 +#define TIME_FMT_ABS_USEC_FRAC 6 + +#define TIME_CACHE_SIZE 4 +#define TIME_CACHE_MASK 3 +static cached_request_time request_time_cache[TIME_CACHE_SIZE]; + +static apr_time_t get_request_end_time(request_rec *r) +{ + log_request_state *state = (log_request_state *)ap_get_module_config(r->request_config, + &log_config_module); + if (!state) { + state = apr_pcalloc(r->pool, sizeof(log_request_state)); + ap_set_module_config(r->request_config, &log_config_module, state); + } + if (state->request_end_time == 0) { + state->request_end_time = apr_time_now(); + } + return state->request_end_time; +} + + +static const char *log_request_time(request_rec *r, char *a) +{ + apr_time_exp_t xt; + apr_time_t request_time = r->request_time; + int fmt_type = TIME_FMT_CUSTOM; + char *fmt = a; + + if (fmt && *fmt) { + if (!strncmp(fmt, "begin", 5)) { + fmt += 5; + if (!*fmt) { + fmt_type = TIME_FMT_CLF; + } + else if (*fmt == ':') { + fmt++; + a = fmt; + } + } + else if (!strncmp(fmt, "end", 3)) { + fmt += 3; + if (!*fmt) { + request_time = get_request_end_time(r); + fmt_type = TIME_FMT_CLF; + } + else if (*fmt == ':') { + fmt++; + a = fmt; + request_time = get_request_end_time(r); + } + } + if (!strncmp(fmt, "msec", 4)) { + fmt += 4; + if (!*fmt) { + fmt_type = TIME_FMT_ABS_MSEC; + } + else if (!strcmp(fmt, "_frac")) { + fmt_type = TIME_FMT_ABS_MSEC_FRAC; + } + } + else if (!strncmp(fmt, "usec", 4)) { + fmt += 4; + if (!*fmt) { + fmt_type = TIME_FMT_ABS_USEC; + } + else if (!strcmp(fmt, "_frac")) { + fmt_type = TIME_FMT_ABS_USEC_FRAC; + } + } + else if (!strcmp(fmt, "sec")) { + fmt_type = TIME_FMT_ABS_SEC; + } + else if (!*fmt) { + fmt_type = TIME_FMT_CLF; + } + } + else { + fmt_type = TIME_FMT_CLF; + } + + if (fmt_type >= TIME_FMT_ABS_SEC) { /* Absolute (micro-/milli-)second time + * or msec/usec fraction + */ + char* buf = apr_palloc(r->pool, 20); + switch (fmt_type) { + case TIME_FMT_ABS_SEC: + apr_snprintf(buf, 20, "%" APR_TIME_T_FMT, apr_time_sec(request_time)); + break; + case TIME_FMT_ABS_MSEC: + apr_snprintf(buf, 20, "%" APR_TIME_T_FMT, apr_time_as_msec(request_time)); + break; + case TIME_FMT_ABS_USEC: + apr_snprintf(buf, 20, "%" APR_TIME_T_FMT, request_time); + break; + case TIME_FMT_ABS_MSEC_FRAC: + apr_snprintf(buf, 20, "%03" APR_TIME_T_FMT, apr_time_msec(request_time)); + break; + case TIME_FMT_ABS_USEC_FRAC: + apr_snprintf(buf, 20, "%06" APR_TIME_T_FMT, apr_time_usec(request_time)); + break; + default: + return "-"; + } + return buf; + } + else if (fmt_type == TIME_FMT_CUSTOM) { /* Custom format */ + /* The custom time formatting uses a very large temp buffer + * on the stack. To avoid using so much stack space in the + * common case where we're not using a custom format, the code + * for the custom format in a separate function. (That's why + * log_request_time_custom is not inlined right here.) + */ + ap_explode_recent_localtime(&xt, request_time); + return log_request_time_custom(r, a, &xt); + } + else { /* CLF format */ + /* This code uses the same technique as ap_explode_recent_localtime(): + * optimistic caching with logic to detect and correct race conditions. + * See the comments in server/util_time.c for more information. + */ + cached_request_time* cached_time = apr_palloc(r->pool, + sizeof(*cached_time)); + unsigned t_seconds = (unsigned)apr_time_sec(request_time); + unsigned i = t_seconds & TIME_CACHE_MASK; + *cached_time = request_time_cache[i]; + if ((t_seconds != cached_time->t) || + (t_seconds != cached_time->t_validate)) { + + /* Invalid or old snapshot, so compute the proper time string + * and store it in the cache + */ + char sign; + int timz; + + ap_explode_recent_localtime(&xt, request_time); + timz = xt.tm_gmtoff; + if (timz < 0) { + timz = -timz; + sign = '-'; + } + else { + sign = '+'; + } + cached_time->t = t_seconds; + apr_snprintf(cached_time->timestr, DEFAULT_REQUEST_TIME_SIZE, + "[%02d/%s/%d:%02d:%02d:%02d %c%.2d%.2d]", + xt.tm_mday, apr_month_snames[xt.tm_mon], + xt.tm_year+1900, xt.tm_hour, xt.tm_min, xt.tm_sec, + sign, timz / (60*60), (timz % (60*60)) / 60); + cached_time->t_validate = t_seconds; + request_time_cache[i] = *cached_time; + } + return cached_time->timestr; + } +} + +static const char *log_request_duration_microseconds(request_rec *r, char *a) +{ + return apr_psprintf(r->pool, "%" APR_TIME_T_FMT, + (get_request_end_time(r) - r->request_time)); +} + +static const char *log_request_duration_scaled(request_rec *r, char *a) +{ + apr_time_t duration = get_request_end_time(r) - r->request_time; + if (*a == '\0' || !strcasecmp(a, "s")) { + duration = apr_time_sec(duration); + } + else if (!strcasecmp(a, "ms")) { + duration = apr_time_as_msec(duration); + } + else if (!strcasecmp(a, "us")) { + } + else { + /* bogus format */ + return a; + } + return apr_psprintf(r->pool, "%" APR_TIME_T_FMT, duration); +} + +/* These next two routines use the canonical name:port so that log + * parsers don't need to duplicate all the vhost parsing crud. + */ +static const char *log_virtual_host(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, r->server->server_hostname); +} + +static const char *log_server_port(request_rec *r, char *a) +{ + apr_port_t port; + + if (*a == '\0' || !strcasecmp(a, "canonical")) { + port = r->server->port ? r->server->port : ap_default_port(r); + } + else if (!strcasecmp(a, "remote")) { + port = r->useragent_addr->port; + } + else if (!strcasecmp(a, "local")) { + port = r->connection->local_addr->port; + } + else { + /* bogus format */ + return a; + } + return apr_itoa(r->pool, (int)port); +} + +/* This respects the setting of UseCanonicalName so that + * the dynamic mass virtual hosting trick works better. + */ +static const char *log_server_name(request_rec *r, char *a) +{ + return ap_escape_logitem(r->pool, ap_get_server_name(r)); +} + +static const char *log_pid_tid(request_rec *r, char *a) +{ + if (*a == '\0' || !strcasecmp(a, "pid")) { + return ap_append_pid(r->pool, "", ""); + } + else if (!strcasecmp(a, "tid") || !strcasecmp(a, "hextid")) { +#if APR_HAS_THREADS + apr_os_thread_t tid = apr_os_thread_current(); +#else + int tid = 0; /* APR will format "0" anyway but an arg is needed */ +#endif + return apr_psprintf(r->pool, + /* APR can format a thread id in hex */ + *a == 'h' ? "%pt" : "%pT", &tid); + } + /* bogus format */ + return a; +} + +static const char *log_connection_status(request_rec *r, char *a) +{ + if (r->connection->aborted) + return "X"; + + if (r->connection->keepalive == AP_CONN_KEEPALIVE && + (!r->server->keep_alive_max || + (r->server->keep_alive_max - r->connection->keepalives) > 0)) { + return "+"; + } + return "-"; +} + +static const char *log_requests_on_connection(request_rec *r, char *a) +{ + int num = r->connection->keepalives ? r->connection->keepalives - 1 : 0; + return apr_itoa(r->pool, num); +} + +/***************************************************************** + * + * Parsing the log format string + */ + +static char *parse_log_misc_string(apr_pool_t *p, log_format_item *it, + const char **sa) +{ + const char *s; + char *d; + + it->func = constant_item; + it->conditions = NULL; + + s = *sa; + while (*s && *s != '%') { + s++; + } + /* + * This might allocate a few chars extra if there's a backslash + * escape in the format string. + */ + it->arg = apr_palloc(p, s - *sa + 1); + + d = it->arg; + s = *sa; + while (*s && *s != '%') { + if (*s != '\\') { + *d++ = *s++; + } + else { + s++; + switch (*s) { + case '\\': + *d++ = '\\'; + s++; + break; + case 'r': + *d++ = '\r'; + s++; + break; + case 'n': + *d++ = '\n'; + s++; + break; + case 't': + *d++ = '\t'; + s++; + break; + default: + /* copy verbatim */ + *d++ = '\\'; + /* + * Allow the loop to deal with this *s in the normal + * fashion so that it handles end of string etc. + * properly. + */ + break; + } + } + } + *d = '\0'; + + *sa = s; + return NULL; +} + +static char *parse_log_item(apr_pool_t *p, log_format_item *it, const char **sa) +{ + const char *s = *sa; + ap_log_handler *handler = NULL; + + if (*s != '%') { + return parse_log_misc_string(p, it, sa); + } + + ++s; + it->condition_sense = 0; + it->conditions = NULL; + + if (*s == '%') { + it->arg = "%"; + it->func = constant_item; + *sa = ++s; + + return NULL; + } + + it->want_orig = -1; + it->arg = ""; /* For safety's sake... */ + + while (*s) { + int i; + + switch (*s) { + case '!': + ++s; + it->condition_sense = !it->condition_sense; + break; + + case '<': + ++s; + it->want_orig = 1; + break; + + case '>': + ++s; + it->want_orig = 0; + break; + + case ',': + ++s; + break; + + case '{': + ++s; + it->arg = ap_getword(p, &s, '}'); + break; + + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + i = *s - '0'; + while (apr_isdigit(*++s)) { + i = i * 10 + (*s) - '0'; + } + if (!it->conditions) { + it->conditions = apr_array_make(p, 4, sizeof(int)); + } + *(int *) apr_array_push(it->conditions) = i; + break; + + default: + /* check for '^' + two character format first */ + if (*s == '^' && *(s+1) && *(s+2)) { + handler = (ap_log_handler *)apr_hash_get(log_hash, s, 3); + if (handler) { + s += 3; + } + } + if (!handler) { + handler = (ap_log_handler *)apr_hash_get(log_hash, s++, 1); + } + if (!handler) { + char dummy[2]; + + dummy[0] = s[-1]; + dummy[1] = '\0'; + return apr_pstrcat(p, "Unrecognized LogFormat directive %", + dummy, NULL); + } + it->func = handler->func; + if (it->want_orig == -1) { + it->want_orig = handler->want_orig_default; + } + *sa = s; + return NULL; + } + } + + return "Ran off end of LogFormat parsing args to some directive"; +} + +static apr_array_header_t *parse_log_string(apr_pool_t *p, const char *s, const char **err) +{ + apr_array_header_t *a = apr_array_make(p, 30, sizeof(log_format_item)); + char *res; + + while (*s) { + if ((res = parse_log_item(p, (log_format_item *) apr_array_push(a), &s))) { + *err = res; + return NULL; + } + } + + s = APR_EOL_STR; + parse_log_item(p, (log_format_item *) apr_array_push(a), &s); + return a; +} + +/***************************************************************** + * + * Actually logging. + */ + +static const char *process_item(request_rec *r, request_rec *orig, + log_format_item *item) +{ + const char *cp; + + /* First, see if we need to process this thing at all... */ + + if (item->conditions && item->conditions->nelts != 0) { + int i; + int *conds = (int *) item->conditions->elts; + int in_list = 0; + + for (i = 0; i < item->conditions->nelts; ++i) { + if (r->status == conds[i]) { + in_list = 1; + break; + } + } + + if ((item->condition_sense && in_list) + || (!item->condition_sense && !in_list)) { + return "-"; + } + } + + /* We do. Do it... */ + + cp = (*item->func) (item->want_orig ? orig : r, item->arg); + return cp ? cp : "-"; +} + +static void flush_log(buffered_log *buf) +{ + if (buf->outcnt && buf->handle != NULL) { + /* XXX: error handling */ + apr_file_write_full(buf->handle, buf->outbuf, buf->outcnt, NULL); + buf->outcnt = 0; + } +} + + +static int config_log_transaction(request_rec *r, config_log_state *cls, + apr_array_header_t *default_format) +{ + log_format_item *items; + const char **strs; + int *strl; + request_rec *orig; + int i; + apr_size_t len = 0; + apr_array_header_t *format; + char *envar; + apr_status_t rv; + + if (cls->fname == NULL) { + return DECLINED; + } + + /* + * See if we've got any conditional envariable-controlled logging decisions + * to make. + */ + if (cls->condition_var != NULL) { + envar = cls->condition_var; + if (*envar != '!') { + if (apr_table_get(r->subprocess_env, envar) == NULL) { + return DECLINED; + } + } + else { + if (apr_table_get(r->subprocess_env, &envar[1]) != NULL) { + return DECLINED; + } + } + } + else if (cls->condition_expr != NULL) { + const char *err; + int rc = ap_expr_exec(r, cls->condition_expr, &err); + if (rc < 0) + ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(00644) + "Error evaluating log condition: %s", err); + if (rc <= 0) + return DECLINED; + } + + format = cls->format ? cls->format : default_format; + + strs = apr_palloc(r->pool, sizeof(char *) * (format->nelts)); + strl = apr_palloc(r->pool, sizeof(int) * (format->nelts)); + items = (log_format_item *) format->elts; + + orig = r; + while (orig->prev) { + orig = orig->prev; + } + while (r->next) { + r = r->next; + } + + for (i = 0; i < format->nelts; ++i) { + strs[i] = process_item(r, orig, &items[i]); + len += strl[i] = strlen(strs[i]); + } + + if (!log_writer) { + ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00645) + "log writer isn't correctly setup"); + return HTTP_INTERNAL_SERVER_ERROR; + } + rv = log_writer(r, cls->log_writer, strs, strl, format->nelts, len); + if (rv != APR_SUCCESS) { + ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, APLOGNO(00646) + "Error writing to %s", cls->fname); + } + return OK; +} + +static int multi_log_transaction(request_rec *r) +{ + multi_log_state *mls = ap_get_module_config(r->server->module_config, + &log_config_module); + config_log_state *clsarray; + int i; + + /* + * Initialize per request state + */ + log_request_state *state = apr_pcalloc(r->pool, sizeof(log_request_state)); + ap_set_module_config(r->request_config, &log_config_module, state); + + /* + * Log this transaction.. + */ + if (mls->config_logs->nelts) { + clsarray = (config_log_state *) mls->config_logs->elts; + for (i = 0; i < mls->config_logs->nelts; ++i) { + config_log_state *cls = &clsarray[i]; + + config_log_transaction(r, cls, mls->default_format); + } + } + + if (mls->server_config_logs) { + clsarray = (config_log_state *) mls->server_config_logs->elts; + for (i = 0; i < mls->server_config_logs->nelts; ++i) { + config_log_state *cls = &clsarray[i]; + + if (cls->inherit || !mls->config_logs->nelts) { + config_log_transaction(r, cls, mls->default_format); + } + } + } + + return OK; +} + +/***************************************************************** + * + * Module glue... + */ + +static void *make_config_log_state(apr_pool_t *p, server_rec *s) +{ + multi_log_state *mls; + + mls = (multi_log_state *) apr_palloc(p, sizeof(multi_log_state)); + mls->config_logs = apr_array_make(p, 1, sizeof(config_log_state)); + mls->default_format_string = NULL; + mls->default_format = NULL; + mls->server_config_logs = NULL; + mls->formats = apr_table_make(p, 4); + apr_table_setn(mls->formats, "CLF", DEFAULT_LOG_FORMAT); + + return mls; +} + +/* + * Use the merger to simply add a pointer from the vhost log state + * to the log of logs specified for the non-vhost configuration. Make sure + * vhosts inherit any globally-defined format names. + */ + +static void *merge_config_log_state(apr_pool_t *p, void *basev, void *addv) +{ + multi_log_state *base = (multi_log_state *) basev; + multi_log_state *add = (multi_log_state *) addv; + + add->server_config_logs = base->config_logs; + if (!add->default_format) { + add->default_format_string = base->default_format_string; + add->default_format = base->default_format; + } + add->formats = apr_table_overlay(p, base->formats, add->formats); + + return add; +} + +/* + * Set the default logfile format, or define a nickname for a format string. + */ +static const char *log_format(cmd_parms *cmd, void *dummy, const char *fmt, + const char *name) +{ + const char *err_string = NULL; + multi_log_state *mls = ap_get_module_config(cmd->server->module_config, + &log_config_module); + + /* + * If we were given two arguments, the second is a name to be given to the + * format. This syntax just defines the nickname - it doesn't actually + * make the format the default. + */ + if (name != NULL) { + parse_log_string(cmd->pool, fmt, &err_string); + if (err_string == NULL) { + apr_table_setn(mls->formats, name, fmt); + } + } + else { + mls->default_format_string = fmt; + mls->default_format = parse_log_string(cmd->pool, fmt, &err_string); + } + return err_string; +} + + +static const char *add_custom_log(cmd_parms *cmd, void *dummy, const char *fn, + const char *fmt, const char *envclause) +{ + const char *err_string = NULL; + multi_log_state *mls = ap_get_module_config(cmd->server->module_config, + &log_config_module); + config_log_state *cls; + + cls = (config_log_state *) apr_array_push(mls->config_logs); + cls->condition_var = NULL; + cls->condition_expr = NULL; + if (envclause != NULL) { + if (strncasecmp(envclause, "env=", 4) == 0) { + if ((envclause[4] == '\0') + || ((envclause[4] == '!') && (envclause[5] == '\0'))) { + return "missing environment variable name"; + } + cls->condition_var = apr_pstrdup(cmd->pool, &envclause[4]); + } + else if (strncasecmp(envclause, "expr=", 5) == 0) { + const char *err; + if ((envclause[5] == '\0')) + return "missing condition"; + cls->condition_expr = ap_expr_parse_cmd(cmd, &envclause[5], + AP_EXPR_FLAG_DONT_VARY, + &err, NULL); + if (err) + return err; + } + else { + return "error in condition clause"; + } + } + + cls->fname = fn; + cls->format_string = fmt; + cls->directive = cmd->directive; + if (fmt == NULL) { + cls->format = NULL; + } + else { + cls->format = parse_log_string(cmd->pool, fmt, &err_string); + } + cls->log_writer = NULL; + + return err_string; +} + +static const char *add_global_log(cmd_parms *cmd, void *dummy, const char *fn, + const char *fmt, const char *envclause) { + multi_log_state *mls = ap_get_module_config(cmd->server->module_config, + &log_config_module); + config_log_state *clsarray; + config_log_state *cls; + const char *ret; + + const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); + + if (err) { + return err; + } + + /* Add a custom log through the normal channel */ + ret = add_custom_log(cmd, dummy, fn, fmt, envclause); + + /* Set the inherit flag unless there was some error */ + if (ret == NULL) { + clsarray = (config_log_state*)mls->config_logs->elts; + cls = &clsarray[mls->config_logs->nelts-1]; + cls->inherit = 1; + } + + return ret; +} + +static const char *set_transfer_log(cmd_parms *cmd, void *dummy, + const char *fn) +{ + return add_custom_log(cmd, dummy, fn, NULL, NULL); +} + +static const char *set_buffered_logs_on(cmd_parms *parms, void *dummy, int flag) +{ + buffered_logs = flag; + if (buffered_logs) { + ap_log_set_writer_init(ap_buffered_log_writer_init); + ap_log_set_writer(ap_buffered_log_writer); + } + else { + ap_log_set_writer_init(ap_default_log_writer_init); + ap_log_set_writer(ap_default_log_writer); + } + return NULL; +} +static const command_rec config_log_cmds[] = +{ +AP_INIT_TAKE23("CustomLog", add_custom_log, NULL, RSRC_CONF, + "a file name, a custom log format string or format name, " + "and an optional \"env=\" or \"expr=\" clause (see docs)"), +AP_INIT_TAKE23("GlobalLog", add_global_log, NULL, RSRC_CONF, + "Same as CustomLog, but forces virtualhosts to inherit the log"), +AP_INIT_TAKE1("TransferLog", set_transfer_log, NULL, RSRC_CONF, + "the filename of the access log"), +AP_INIT_TAKE12("LogFormat", log_format, NULL, RSRC_CONF, + "a log format string (see docs) and an optional format name"), +AP_INIT_FLAG("BufferedLogs", set_buffered_logs_on, NULL, RSRC_CONF, + "Enable Buffered Logging (experimental)"), + {NULL} +}; + +static config_log_state *open_config_log(server_rec *s, apr_pool_t *p, + config_log_state *cls, + apr_array_header_t *default_format) +{ + if (cls->log_writer != NULL) { + return cls; /* virtual config shared w/main server */ + } + + if (cls->fname == NULL) { + return cls; /* Leave it NULL to decline. */ + } + + cls->log_writer = log_writer_init(p, s, cls->fname); + if (cls->log_writer == NULL) + return NULL; + + return cls; +} + +static int open_multi_logs(server_rec *s, apr_pool_t *p) +{ + int i; + multi_log_state *mls = ap_get_module_config(s->module_config, + &log_config_module); + config_log_state *clsarray; + const char *dummy; + const char *format; + + if (mls->default_format_string) { + format = apr_table_get(mls->formats, mls->default_format_string); + if (format) { + mls->default_format = parse_log_string(p, format, &dummy); + } + } + + if (!mls->default_format) { + mls->default_format = parse_log_string(p, DEFAULT_LOG_FORMAT, &dummy); + } + + if (mls->config_logs->nelts) { + clsarray = (config_log_state *) mls->config_logs->elts; + for (i = 0; i < mls->config_logs->nelts; ++i) { + config_log_state *cls = &clsarray[i]; + + if (cls->format_string) { + format = apr_table_get(mls->formats, cls->format_string); + if (format) { + cls->format = parse_log_string(p, format, &dummy); + } + } + + if (!open_config_log(s, p, cls, mls->default_format)) { + /* Failure already logged by open_config_log */ + return DONE; + } + } + } + else if (mls->server_config_logs) { + clsarray = (config_log_state *) mls->server_config_logs->elts; + for (i = 0; i < mls->server_config_logs->nelts; ++i) { + config_log_state *cls = &clsarray[i]; + + if (cls->format_string) { + format = apr_table_get(mls->formats, cls->format_string); + if (format) { + cls->format = parse_log_string(p, format, &dummy); + } + } + + if (!open_config_log(s, p, cls, mls->default_format)) { + /* Failure already logged by open_config_log */ + return DONE; + } + } + } + + return OK; +} + + +static apr_status_t flush_all_logs(void *data) +{ + server_rec *s = data; + multi_log_state *mls; + apr_array_header_t *log_list; + config_log_state *clsarray; + buffered_log *buf; + int i; + + if (!buffered_logs) + return APR_SUCCESS; + + for (; s; s = s->next) { + mls = ap_get_module_config(s->module_config, &log_config_module); + log_list = NULL; + if (mls->config_logs->nelts) { + log_list = mls->config_logs; + } + else if (mls->server_config_logs) { + log_list = mls->server_config_logs; + } + if (log_list) { + clsarray = (config_log_state *) log_list->elts; + for (i = 0; i < log_list->nelts; ++i) { + buf = clsarray[i].log_writer; + flush_log(buf); + } + } + } + return APR_SUCCESS; +} + + +static int init_config_log(apr_pool_t *pc, apr_pool_t *p, apr_pool_t *pt, server_rec *s) +{ + int res; + + /* First init the buffered logs array, which is needed when opening the logs. */ + if (buffered_logs) { + all_buffered_logs = apr_array_make(p, 5, sizeof(buffered_log *)); + } + + /* Next, do "physical" server, which gets default log fd and format + * for the virtual servers, if they don't override... + */ + res = open_multi_logs(s, p); + + /* Then, virtual servers */ + + for (s = s->next; (res == OK) && s; s = s->next) { + res = open_multi_logs(s, p); + } + + return res; +} + +static void init_child(apr_pool_t *p, server_rec *s) +{ + int mpm_threads; + + ap_mpm_query(AP_MPMQ_MAX_THREADS, &mpm_threads); + + /* Now register the last buffer flush with the cleanup engine */ + if (buffered_logs) { + int i; + buffered_log **array = (buffered_log **)all_buffered_logs->elts; + + apr_pool_cleanup_register(p, s, flush_all_logs, flush_all_logs); + + for (i = 0; i < all_buffered_logs->nelts; i++) { + buffered_log *this = array[i]; + +#if APR_HAS_THREADS + if (mpm_threads > 1) { + apr_status_t rv; + + this->mutex.type = apr_anylock_threadmutex; + rv = apr_thread_mutex_create(&this->mutex.lock.tm, + APR_THREAD_MUTEX_DEFAULT, + p); + if (rv != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(00647) + "could not initialize buffered log mutex, " + "transfer log may become corrupted"); + this->mutex.type = apr_anylock_none; + } + } + else +#endif + { + this->mutex.type = apr_anylock_none; + } + } + } +} + +static void ap_register_log_handler(apr_pool_t *p, char *tag, + ap_log_handler_fn_t *handler, int def) +{ + ap_log_handler *log_struct = apr_palloc(p, sizeof(*log_struct)); + log_struct->func = handler; + log_struct->want_orig_default = def; + + apr_hash_set(log_hash, tag, strlen(tag), (const void *)log_struct); +} +static ap_log_writer_init *ap_log_set_writer_init(ap_log_writer_init *handle) +{ + ap_log_writer_init *old = log_writer_init; + log_writer_init = handle; + + return old; + +} +static ap_log_writer *ap_log_set_writer(ap_log_writer *handle) +{ + ap_log_writer *old = log_writer; + log_writer = handle; + + return old; +} + +static apr_status_t ap_default_log_writer( request_rec *r, + void *handle, + const char **strs, + int *strl, + int nelts, + apr_size_t len) + +{ + char *str; + char *s; + int i; + apr_status_t rv; + + /* + * We do this memcpy dance because write() is atomic for len < PIPE_BUF, + * while writev() need not be. + */ + str = apr_palloc(r->pool, len + 1); + + for (i = 0, s = str; i < nelts; ++i) { + memcpy(s, strs[i], strl[i]); + s += strl[i]; + } + + rv = apr_file_write((apr_file_t*)handle, str, &len); + + return rv; +} +static void *ap_default_log_writer_init(apr_pool_t *p, server_rec *s, + const char* name) +{ + if (*name == '|') { + piped_log *pl; + + pl = ap_open_piped_log(p, name + 1); + if (pl == NULL) { + return NULL; + } + return ap_piped_log_write_fd(pl); + } + else { + const char *fname = ap_server_root_relative(p, name); + apr_file_t *fd; + apr_status_t rv; + + if (!fname) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_EBADPATH, s, APLOGNO(00648) + "invalid transfer log path %s.", name); + return NULL; + } + rv = apr_file_open(&fd, fname, xfer_flags, xfer_perms, p); + if (rv != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(00649) + "could not open transfer log file %s.", fname); + return NULL; + } + return fd; + } +} +static void *ap_buffered_log_writer_init(apr_pool_t *p, server_rec *s, + const char* name) +{ + buffered_log *b; + b = apr_pcalloc(p, sizeof(buffered_log)); + b->handle = ap_default_log_writer_init(p, s, name); + + if (b->handle) { + *(buffered_log **)apr_array_push(all_buffered_logs) = b; + return b; + } + else + return NULL; +} +static apr_status_t ap_buffered_log_writer(request_rec *r, + void *handle, + const char **strs, + int *strl, + int nelts, + apr_size_t len) + +{ + char *str; + char *s; + int i; + apr_status_t rv; + buffered_log *buf = (buffered_log*)handle; + + if ((rv = APR_ANYLOCK_LOCK(&buf->mutex)) != APR_SUCCESS) { + return rv; + } + + if (len + buf->outcnt > LOG_BUFSIZE) { + flush_log(buf); + } + if (len >= LOG_BUFSIZE) { + apr_size_t w; + + /* + * We do this memcpy dance because write() is atomic for + * len < PIPE_BUF, while writev() need not be. + */ + str = apr_palloc(r->pool, len + 1); + for (i = 0, s = str; i < nelts; ++i) { + memcpy(s, strs[i], strl[i]); + s += strl[i]; + } + w = len; + rv = apr_file_write_full(buf->handle, str, w, NULL); + + } + else { + for (i = 0, s = &buf->outbuf[buf->outcnt]; i < nelts; ++i) { + memcpy(s, strs[i], strl[i]); + s += strl[i]; + } + buf->outcnt += len; + rv = APR_SUCCESS; + } + + APR_ANYLOCK_UNLOCK(&buf->mutex); + return rv; +} + +static int log_pre_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp) +{ + static APR_OPTIONAL_FN_TYPE(ap_register_log_handler) *log_pfn_register; + + log_pfn_register = APR_RETRIEVE_OPTIONAL_FN(ap_register_log_handler); + + if (log_pfn_register) { + log_pfn_register(p, "h", log_remote_host, 0); + log_pfn_register(p, "a", log_remote_address, 0 ); + log_pfn_register(p, "A", log_local_address, 0 ); + log_pfn_register(p, "l", log_remote_logname, 0); + log_pfn_register(p, "u", log_remote_user, 0); + log_pfn_register(p, "t", log_request_time, 0); + log_pfn_register(p, "f", log_request_file, 0); + log_pfn_register(p, "b", clf_log_bytes_sent, 0); + log_pfn_register(p, "B", log_bytes_sent, 0); + log_pfn_register(p, "i", log_header_in, 0); + log_pfn_register(p, "o", log_header_out, 0); + log_pfn_register(p, "n", log_note, 0); + log_pfn_register(p, "L", log_log_id, 1); + log_pfn_register(p, "e", log_env_var, 0); + log_pfn_register(p, "V", log_server_name, 0); + log_pfn_register(p, "v", log_virtual_host, 0); + log_pfn_register(p, "p", log_server_port, 0); + log_pfn_register(p, "P", log_pid_tid, 0); + log_pfn_register(p, "H", log_request_protocol, 0); + log_pfn_register(p, "m", log_request_method, 0); + log_pfn_register(p, "q", log_request_query, 0); + log_pfn_register(p, "X", log_connection_status, 0); + log_pfn_register(p, "C", log_cookie, 0); + log_pfn_register(p, "k", log_requests_on_connection, 0); + log_pfn_register(p, "r", log_request_line, 1); + log_pfn_register(p, "D", log_request_duration_microseconds, 1); + log_pfn_register(p, "T", log_request_duration_scaled, 1); + log_pfn_register(p, "U", log_request_uri, 1); + log_pfn_register(p, "s", log_status, 1); + log_pfn_register(p, "R", log_handler, 1); + + log_pfn_register(p, "^ti", log_trailer_in, 0); + log_pfn_register(p, "^to", log_trailer_out, 0); + } + + /* reset to default conditions */ + ap_log_set_writer_init(ap_default_log_writer_init); + ap_log_set_writer(ap_default_log_writer); + buffered_logs = 0; + + return OK; +} + +static int check_log_dir(apr_pool_t *p, server_rec *s, config_log_state *cls) +{ + if (!cls->fname || cls->fname[0] == '|' || !cls->directive) { + return OK; + } + else { + char *abs = ap_server_root_relative(p, cls->fname); + char *dir = ap_make_dirstr_parent(p, abs); + apr_finfo_t finfo; + const ap_directive_t *directive = cls->directive; + apr_status_t rv = apr_stat(&finfo, dir, APR_FINFO_TYPE, p); + cls->directive = NULL; /* Don't check this config_log_state again */ + if (rv == APR_SUCCESS && finfo.filetype != APR_DIR) + rv = APR_ENOTDIR; + if (rv != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_EMERG, rv, s, + APLOGNO(02297) + "Cannot access directory '%s' for log file '%s' " + "defined at %s:%d", dir, cls->fname, + directive->filename, directive->line_num); + return !OK; + } + } + return OK; +} + +static int log_check_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s) +{ + int rv = OK; + while (s) { + multi_log_state *mls = ap_get_module_config(s->module_config, + &log_config_module); + /* + * We don't need to check mls->server_config_logs because it just + * points to the parent server's mls->config_logs. + */ + apr_array_header_t *log_list = mls->config_logs; + config_log_state *clsarray = (config_log_state *) log_list->elts; + int i; + for (i = 0; i < log_list->nelts; ++i) { + if (check_log_dir(ptemp, s, &clsarray[i]) != OK) + rv = !OK; + } + + s = s->next; + } + return rv; +} + +static void register_hooks(apr_pool_t *p) +{ + ap_hook_pre_config(log_pre_config,NULL,NULL,APR_HOOK_REALLY_FIRST); + ap_hook_check_config(log_check_config,NULL,NULL,APR_HOOK_MIDDLE); + ap_hook_child_init(init_child,NULL,NULL,APR_HOOK_MIDDLE); + ap_hook_open_logs(init_config_log,NULL,NULL,APR_HOOK_MIDDLE); + ap_hook_log_transaction(multi_log_transaction,NULL,NULL,APR_HOOK_MIDDLE); + + /* Init log_hash before we register the optional function. It is + * possible for the optional function, ap_register_log_handler, + * to be called before any other mod_log_config hooks are called. + * As a policy, we should init everything required by an optional function + * before calling APR_REGISTER_OPTIONAL_FN. + */ + log_hash = apr_hash_make(p); + APR_REGISTER_OPTIONAL_FN(ap_register_log_handler); + APR_REGISTER_OPTIONAL_FN(ap_log_set_writer_init); + APR_REGISTER_OPTIONAL_FN(ap_log_set_writer); +} + +AP_DECLARE_MODULE(log_config) = +{ + STANDARD20_MODULE_STUFF, + NULL, /* create per-dir config */ + NULL, /* merge per-dir config */ + make_config_log_state, /* server config */ + merge_config_log_state, /* merge server config */ + config_log_cmds, /* command apr_table_t */ + register_hooks /* register hooks */ +}; + |