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/* 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.
*/
/*
* http_log.c: Dealing with the logs and errors
*
* Rob McCool
*
*/
#include "apr.h"
#include "apr_general.h" /* for signal stuff */
#include "apr_strings.h"
#include "apr_errno.h"
#include "apr_thread_proc.h"
#include "apr_lib.h"
#include "apr_signal.h"
#include "apr_portable.h"
#include "apr_base64.h"
#define APR_WANT_STDIO
#define APR_WANT_STRFUNC
#include "apr_want.h"
#if APR_HAVE_STDARG_H
#include <stdarg.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#if APR_HAVE_PROCESS_H
#include <process.h> /* for getpid() on Win32 */
#endif
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_log.h"
#include "http_main.h"
#include "util_time.h"
#include "ap_mpm.h"
#include "ap_listen.h"
#if HAVE_GETTID
#include <sys/syscall.h>
#include <sys/types.h>
#endif
/* we know core's module_index is 0 */
#undef APLOG_MODULE_INDEX
#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
typedef struct {
const char *t_name;
int t_val;
} TRANS;
APR_HOOK_STRUCT(
APR_HOOK_LINK(error_log)
APR_HOOK_LINK(generate_log_id)
)
int AP_DECLARE_DATA ap_default_loglevel = DEFAULT_LOGLEVEL;
#ifdef HAVE_SYSLOG
static const TRANS facilities[] = {
{"auth", LOG_AUTH},
#ifdef LOG_AUTHPRIV
{"authpriv",LOG_AUTHPRIV},
#endif
#ifdef LOG_CRON
{"cron", LOG_CRON},
#endif
#ifdef LOG_DAEMON
{"daemon", LOG_DAEMON},
#endif
#ifdef LOG_FTP
{"ftp", LOG_FTP},
#endif
#ifdef LOG_KERN
{"kern", LOG_KERN},
#endif
#ifdef LOG_LPR
{"lpr", LOG_LPR},
#endif
#ifdef LOG_MAIL
{"mail", LOG_MAIL},
#endif
#ifdef LOG_NEWS
{"news", LOG_NEWS},
#endif
#ifdef LOG_SYSLOG
{"syslog", LOG_SYSLOG},
#endif
#ifdef LOG_USER
{"user", LOG_USER},
#endif
#ifdef LOG_UUCP
{"uucp", LOG_UUCP},
#endif
#ifdef LOG_LOCAL0
{"local0", LOG_LOCAL0},
#endif
#ifdef LOG_LOCAL1
{"local1", LOG_LOCAL1},
#endif
#ifdef LOG_LOCAL2
{"local2", LOG_LOCAL2},
#endif
#ifdef LOG_LOCAL3
{"local3", LOG_LOCAL3},
#endif
#ifdef LOG_LOCAL4
{"local4", LOG_LOCAL4},
#endif
#ifdef LOG_LOCAL5
{"local5", LOG_LOCAL5},
#endif
#ifdef LOG_LOCAL6
{"local6", LOG_LOCAL6},
#endif
#ifdef LOG_LOCAL7
{"local7", LOG_LOCAL7},
#endif
{NULL, -1},
};
#endif
static const TRANS priorities[] = {
{"emerg", APLOG_EMERG},
{"alert", APLOG_ALERT},
{"crit", APLOG_CRIT},
{"error", APLOG_ERR},
{"warn", APLOG_WARNING},
{"notice", APLOG_NOTICE},
{"info", APLOG_INFO},
{"debug", APLOG_DEBUG},
{"trace1", APLOG_TRACE1},
{"trace2", APLOG_TRACE2},
{"trace3", APLOG_TRACE3},
{"trace4", APLOG_TRACE4},
{"trace5", APLOG_TRACE5},
{"trace6", APLOG_TRACE6},
{"trace7", APLOG_TRACE7},
{"trace8", APLOG_TRACE8},
{NULL, -1},
};
static apr_pool_t *stderr_pool = NULL;
static apr_file_t *stderr_log = NULL;
/* track pipe handles to close in child process */
typedef struct read_handle_t {
struct read_handle_t *next;
apr_file_t *handle;
} read_handle_t;
static read_handle_t *read_handles;
/**
* @brief The piped logging structure.
*
* Piped logs are used to move functionality out of the main server.
* For example, log rotation is done with piped logs.
*/
struct piped_log {
/** The pool to use for the piped log */
apr_pool_t *p;
/** The pipe between the server and the logging process */
apr_file_t *read_fd, *write_fd;
#ifdef AP_HAVE_RELIABLE_PIPED_LOGS
/** The name of the program the logging process is running */
char *program;
/** The pid of the logging process */
apr_proc_t *pid;
/** How to reinvoke program when it must be replaced */
apr_cmdtype_e cmdtype;
#endif
};
AP_DECLARE(apr_file_t *) ap_piped_log_read_fd(piped_log *pl)
{
return pl->read_fd;
}
AP_DECLARE(apr_file_t *) ap_piped_log_write_fd(piped_log *pl)
{
return pl->write_fd;
}
/* remember to close this handle in the child process
*
* On Win32 this makes zero sense, because we don't
* take the parent process's child procs.
* If the win32 parent instead passed each and every
* logger write handle from itself down to the child,
* and the parent manages all aspects of keeping the
* reliable pipe log children alive, this would still
* make no sense :) Cripple it on Win32.
*/
static void close_handle_in_child(apr_pool_t *p, apr_file_t *f)
{
#ifndef WIN32
read_handle_t *new_handle;
new_handle = apr_pcalloc(p, sizeof(read_handle_t));
new_handle->next = read_handles;
new_handle->handle = f;
read_handles = new_handle;
#endif
}
void ap_logs_child_init(apr_pool_t *p, server_rec *s)
{
read_handle_t *cur = read_handles;
while (cur) {
apr_file_close(cur->handle);
cur = cur->next;
}
}
AP_DECLARE(void) ap_open_stderr_log(apr_pool_t *p)
{
apr_file_open_stderr(&stderr_log, p);
}
AP_DECLARE(apr_status_t) ap_replace_stderr_log(apr_pool_t *p,
const char *fname)
{
apr_file_t *stderr_file;
apr_status_t rc;
char *filename = ap_server_root_relative(p, fname);
if (!filename) {
ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT,
APR_EBADPATH, NULL, APLOGNO(00085) "Invalid -E error log file %s",
fname);
return APR_EBADPATH;
}
if ((rc = apr_file_open(&stderr_file, filename,
APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
APR_OS_DEFAULT, p)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL, APLOGNO(00086)
"%s: could not open error log file %s.",
ap_server_argv0, fname);
return rc;
}
if (!stderr_pool) {
/* This is safe provided we revert it when we are finished.
* We don't manager the callers pool!
*/
stderr_pool = p;
}
if ((rc = apr_file_open_stderr(&stderr_log, stderr_pool))
== APR_SUCCESS) {
apr_file_flush(stderr_log);
if ((rc = apr_file_dup2(stderr_log, stderr_file, stderr_pool))
== APR_SUCCESS) {
apr_file_close(stderr_file);
/*
* You might ponder why stderr_pool should survive?
* The trouble is, stderr_pool may have s_main->error_log,
* so we aren't in a position to destory stderr_pool until
* the next recycle. There's also an apparent bug which
* is not; if some folk decided to call this function before
* the core open error logs hook, this pool won't survive.
* Neither does the stderr logger, so this isn't a problem.
*/
}
}
/* Revert, see above */
if (stderr_pool == p)
stderr_pool = NULL;
if (rc != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL, APLOGNO(00087)
"unable to replace stderr with error log file");
}
return rc;
}
static void log_child_errfn(apr_pool_t *pool, apr_status_t err,
const char *description)
{
ap_log_error(APLOG_MARK, APLOG_ERR, err, NULL, APLOGNO(00088)
"%s", description);
}
/* Create a child process running PROGNAME with a pipe connected to
* the childs stdin. The write-end of the pipe will be placed in
* *FPIN on successful return. If dummy_stderr is non-zero, the
* stderr for the child will be the same as the stdout of the parent.
* Otherwise the child will inherit the stderr from the parent. */
static int log_child(apr_pool_t *p, const char *progname,
apr_file_t **fpin, apr_cmdtype_e cmdtype,
int dummy_stderr)
{
/* Child process code for 'ErrorLog "|..."';
* may want a common framework for this, since I expect it will
* be common for other foo-loggers to want this sort of thing...
*/
apr_status_t rc;
apr_procattr_t *procattr;
apr_proc_t *procnew;
apr_file_t *errfile;
if (((rc = apr_procattr_create(&procattr, p)) == APR_SUCCESS)
&& ((rc = apr_procattr_dir_set(procattr,
ap_server_root)) == APR_SUCCESS)
&& ((rc = apr_procattr_cmdtype_set(procattr, cmdtype)) == APR_SUCCESS)
&& ((rc = apr_procattr_io_set(procattr,
APR_FULL_BLOCK,
APR_NO_PIPE,
APR_NO_PIPE)) == APR_SUCCESS)
&& ((rc = apr_procattr_error_check_set(procattr, 1)) == APR_SUCCESS)
&& ((rc = apr_procattr_child_errfn_set(procattr, log_child_errfn))
== APR_SUCCESS)) {
char **args;
apr_tokenize_to_argv(progname, &args, p);
procnew = (apr_proc_t *)apr_pcalloc(p, sizeof(*procnew));
if (dummy_stderr) {
if ((rc = apr_file_open_stdout(&errfile, p)) == APR_SUCCESS)
rc = apr_procattr_child_err_set(procattr, errfile, NULL);
}
rc = apr_proc_create(procnew, args[0], (const char * const *)args,
NULL, procattr, p);
if (rc == APR_SUCCESS) {
apr_pool_note_subprocess(p, procnew, APR_KILL_AFTER_TIMEOUT);
(*fpin) = procnew->in;
/* read handle to pipe not kept open, so no need to call
* close_handle_in_child()
*/
}
}
return rc;
}
/* Open the error log for the given server_rec. If IS_MAIN is
* non-zero, s is the main server. */
static int open_error_log(server_rec *s, int is_main, apr_pool_t *p)
{
const char *fname;
int rc;
if (*s->error_fname == '|') {
apr_file_t *dummy = NULL;
apr_cmdtype_e cmdtype = APR_PROGRAM_ENV;
fname = s->error_fname + 1;
/* In 2.4 favor PROGRAM_ENV, accept "||prog" syntax for compatibility
* and "|$cmd" to override the default.
* Any 2.2 backport would continue to favor SHELLCMD_ENV so there
* accept "||prog" to override, and "|$cmd" to ease conversion.
*/
if (*fname == '|')
++fname;
if (*fname == '$') {
cmdtype = APR_SHELLCMD_ENV;
++fname;
}
/* Spawn a new child logger. If this is the main server_rec,
* the new child must use a dummy stderr since the current
* stderr might be a pipe to the old logger. Otherwise, the
* child inherits the parents stderr. */
rc = log_child(p, fname, &dummy, cmdtype, is_main);
if (rc != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL, APLOGNO(00089)
"Couldn't start ErrorLog process '%s'.",
s->error_fname + 1);
return DONE;
}
s->error_log = dummy;
}
#ifdef HAVE_SYSLOG
else if (!strncasecmp(s->error_fname, "syslog", 6)) {
if ((fname = strchr(s->error_fname, ':'))) {
/* s->error_fname could be [level]:[tag] (see #60525) */
const char *tag;
apr_size_t flen;
const TRANS *fac;
fname++;
tag = ap_strchr_c(fname, ':');
if (tag) {
flen = tag - fname;
tag++;
if (*tag == '\0') {
tag = ap_server_argv0;
}
} else {
flen = strlen(fname);
tag = ap_server_argv0;
}
if (flen == 0) {
/* Was something like syslog::foobar */
openlog(tag, LOG_NDELAY|LOG_CONS|LOG_PID, LOG_LOCAL7);
} else {
for (fac = facilities; fac->t_name; fac++) {
if (!strncasecmp(fname, fac->t_name, flen)) {
openlog(tag, LOG_NDELAY|LOG_CONS|LOG_PID,
fac->t_val);
s->error_log = NULL;
return OK;
}
}
/* Huh? Invalid level name? */
ap_log_error(APLOG_MARK, APLOG_STARTUP, APR_EBADPATH, NULL, APLOGNO(10036)
"%s: could not open syslog error log %s.",
ap_server_argv0, fname);
return DONE;
}
}
else {
openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID, LOG_LOCAL7);
}
s->error_log = NULL;
}
#endif
else {
fname = ap_server_root_relative(p, s->error_fname);
if (!fname) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, APR_EBADPATH, NULL, APLOGNO(00090)
"%s: Invalid error log path %s.",
ap_server_argv0, s->error_fname);
return DONE;
}
if ((rc = apr_file_open(&s->error_log, fname,
APR_APPEND | APR_WRITE | APR_CREATE | APR_LARGEFILE,
APR_OS_DEFAULT, p)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL, APLOGNO(00091)
"%s: could not open error log file %s.",
ap_server_argv0, fname);
return DONE;
}
}
return OK;
}
int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
apr_pool_t *ptemp, server_rec *s_main)
{
apr_pool_t *stderr_p;
server_rec *virt, *q;
int replace_stderr;
/* Register to throw away the read_handles list when we
* cleanup plog. Upon fork() for the apache children,
* this read_handles list is closed so only the parent
* can relaunch a lost log child. These read handles
* are always closed on exec.
* We won't care what happens to our stderr log child
* between log phases, so we don't mind losing stderr's
* read_handle a little bit early.
*/
apr_pool_cleanup_register(p, &read_handles, ap_pool_cleanup_set_null,
apr_pool_cleanup_null);
/* HERE we need a stdout log that outlives plog.
* We *presume* the parent of plog is a process
* or global pool which spans server restarts.
* Create our stderr_pool as a child of the plog's
* parent pool.
*/
apr_pool_create(&stderr_p, apr_pool_parent_get(p));
apr_pool_tag(stderr_p, "stderr_pool");
if (open_error_log(s_main, 1, stderr_p) != OK) {
return DONE;
}
replace_stderr = 1;
if (s_main->error_log) {
apr_status_t rv;
/* Replace existing stderr with new log. */
apr_file_flush(s_main->error_log);
rv = apr_file_dup2(stderr_log, s_main->error_log, stderr_p);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s_main, APLOGNO(00092)
"unable to replace stderr with error_log");
}
else {
/* We are done with stderr_pool, close it, killing
* the previous generation's stderr logger
*/
if (stderr_pool)
apr_pool_destroy(stderr_pool);
stderr_pool = stderr_p;
replace_stderr = 0;
/*
* Now that we have dup'ed s_main->error_log to stderr_log
* close it and set s_main->error_log to stderr_log. This avoids
* this fd being inherited by the next piped logger who would
* keep open the writing end of the pipe that this one uses
* as stdin. This in turn would prevent the piped logger from
* exiting.
*/
apr_file_close(s_main->error_log);
s_main->error_log = stderr_log;
}
}
/* note that stderr may still need to be replaced with something
* because it points to the old error log, or back to the tty
* of the submitter.
* XXX: This is BS - /dev/null is non-portable
* errno-as-apr_status_t is also non-portable
*/
#ifdef WIN32
#define NULL_DEVICE "nul"
#else
#define NULL_DEVICE "/dev/null"
#endif
if (replace_stderr && freopen(NULL_DEVICE, "w", stderr) == NULL) {
ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main, APLOGNO(00093)
"unable to replace stderr with %s", NULL_DEVICE);
}
for (virt = s_main->next; virt; virt = virt->next) {
if (virt->error_fname) {
for (q=s_main; q != virt; q = q->next) {
if (q->error_fname != NULL
&& strcmp(q->error_fname, virt->error_fname) == 0) {
break;
}
}
if (q == virt) {
if (open_error_log(virt, 0, p) != OK) {
return DONE;
}
}
else {
virt->error_log = q->error_log;
}
}
else {
virt->error_log = s_main->error_log;
}
}
return OK;
}
AP_DECLARE(void) ap_error_log2stderr(server_rec *s) {
apr_file_t *errfile = NULL;
apr_file_open_stderr(&errfile, s->process->pool);
if (s->error_log != NULL) {
apr_file_dup2(s->error_log, errfile, s->process->pool);
}
}
static int cpystrn(char *buf, const char *arg, int buflen)
{
char *end;
if (!arg)
return 0;
end = apr_cpystrn(buf, arg, buflen);
return end - buf;
}
static int log_remote_address(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (info->r && !(arg && *arg == 'c'))
return apr_snprintf(buf, buflen, "%s:%d", info->r->useragent_ip,
info->r->useragent_addr ? info->r->useragent_addr->port : 0);
else if (info->c)
return apr_snprintf(buf, buflen, "%s:%d", info->c->client_ip,
info->c->client_addr ? info->c->client_addr->port : 0);
else
return 0;
}
static int log_local_address(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (info->c)
return apr_snprintf(buf, buflen, "%s:%d", info->c->local_ip,
info->c->local_addr->port);
else
return 0;
}
static int log_pid(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
pid_t pid = getpid();
return apr_snprintf(buf, buflen, "%" APR_PID_T_FMT, pid);
}
static int log_tid(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
#if APR_HAS_THREADS
int result;
#endif
#if HAVE_GETTID
if (arg && *arg == 'g') {
pid_t tid = syscall(SYS_gettid);
if (tid == -1)
return 0;
return apr_snprintf(buf, buflen, "%"APR_PID_T_FMT, tid);
}
#endif
#if APR_HAS_THREADS
if (ap_mpm_query(AP_MPMQ_IS_THREADED, &result) == APR_SUCCESS
&& result != AP_MPMQ_NOT_SUPPORTED)
{
apr_os_thread_t tid = apr_os_thread_current();
return apr_snprintf(buf, buflen, "%pT", &tid);
}
#endif
return 0;
}
static int log_ctime(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
int time_len = buflen;
int option = AP_CTIME_OPTION_NONE;
while (arg && *arg) {
switch (*arg) {
case 'u': option |= AP_CTIME_OPTION_USEC;
break;
case 'c': option |= AP_CTIME_OPTION_COMPACT;
break;
}
arg++;
}
ap_recent_ctime_ex(buf, apr_time_now(), option, &time_len);
/* ap_recent_ctime_ex includes the trailing \0 in time_len */
return time_len - 1;
}
static int log_loglevel(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (info->level < 0)
return 0;
else
return cpystrn(buf, priorities[info->level].t_name, buflen);
}
static int log_log_id(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
/*
* C: log conn log_id if available,
* c: log conn log id if available and not a once-per-request log line
* else: log request log id if available
*/
if (arg && !strcasecmp(arg, "c")) {
if (info->c && (*arg != 'C' || !info->r)) {
return cpystrn(buf, info->c->log_id, buflen);
}
}
else if (info->rmain) {
return cpystrn(buf, info->rmain->log_id, buflen);
}
return 0;
}
static int log_keepalives(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (!info->c)
return 0;
return apr_snprintf(buf, buflen, "%d", info->c->keepalives);
}
static int log_module_name(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
return cpystrn(buf, ap_find_module_short_name(info->module_index), buflen);
}
static int log_file_line(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (info->file == NULL) {
return 0;
}
else {
const char *file = info->file;
#if defined(_OSD_POSIX) || defined(WIN32) || defined(__MVS__)
char tmp[256];
char *e = strrchr(file, '/');
#ifdef WIN32
if (!e) {
e = strrchr(file, '\\');
}
#endif
/* In OSD/POSIX, the compiler returns for __FILE__
* a string like: __FILE__="*POSIX(/usr/include/stdio.h)"
* (it even returns an absolute path for sources in
* the current directory). Here we try to strip this
* down to the basename.
*/
if (e != NULL && e[1] != '\0') {
apr_snprintf(tmp, sizeof(tmp), "%s", &e[1]);
e = &tmp[strlen(tmp)-1];
if (*e == ')') {
*e = '\0';
}
file = tmp;
}
#else /* _OSD_POSIX || WIN32 */
const char *p;
/* On Unix, __FILE__ may be an absolute path in a
* VPATH build. */
if (file[0] == '/' && (p = ap_strrchr_c(file, '/')) != NULL) {
file = p + 1;
}
#endif /*_OSD_POSIX || WIN32 */
return apr_snprintf(buf, buflen, "%s(%d)", file, info->line);
}
}
static int log_apr_status(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
apr_status_t status = info->status;
int len;
if (!status)
return 0;
if (status < APR_OS_START_EAIERR) {
len = apr_snprintf(buf, buflen, "(%d)", status);
}
else if (status < APR_OS_START_SYSERR) {
len = apr_snprintf(buf, buflen, "(EAI %d)",
status - APR_OS_START_EAIERR);
}
else if (status < 100000 + APR_OS_START_SYSERR) {
len = apr_snprintf(buf, buflen, "(OS %d)",
status - APR_OS_START_SYSERR);
}
else {
len = apr_snprintf(buf, buflen, "(os 0x%08x)",
status - APR_OS_START_SYSERR);
}
apr_strerror(status, buf + len, buflen - len);
len += strlen(buf + len);
return len;
}
static int log_server_name(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (info->r)
return cpystrn(buf, ap_get_server_name((request_rec *)info->r), buflen);
return 0;
}
static int log_virtual_host(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (info->s)
return cpystrn(buf, info->s->server_hostname, buflen);
return 0;
}
static int log_table_entry(const apr_table_t *table, const char *name,
char *buf, int buflen)
{
#ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
const char *value;
char scratch[MAX_STRING_LEN];
if ((value = apr_table_get(table, name)) != NULL) {
ap_escape_errorlog_item(scratch, value, MAX_STRING_LEN);
return cpystrn(buf, scratch, buflen);
}
return 0;
#else
return cpystrn(buf, apr_table_get(table, name), buflen);
#endif
}
static int log_header(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (info->r)
return log_table_entry(info->r->headers_in, arg, buf, buflen);
return 0;
}
static int log_note(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
/* XXX: maybe escaping the entry is not necessary for notes? */
if (info->r)
return log_table_entry(info->r->notes, arg, buf, buflen);
return 0;
}
static int log_env_var(const ap_errorlog_info *info, const char *arg,
char *buf, int buflen)
{
if (info->r)
return log_table_entry(info->r->subprocess_env, arg, buf, buflen);
return 0;
}
static int core_generate_log_id(const conn_rec *c, const request_rec *r,
const char **idstring)
{
apr_uint64_t id, tmp;
pid_t pid;
int len;
char *encoded;
if (r && r->request_time) {
id = (apr_uint64_t)r->request_time;
}
else {
id = (apr_uint64_t)apr_time_now();
}
pid = getpid();
if (sizeof(pid_t) > 2) {
tmp = pid;
tmp = tmp << 40;
id ^= tmp;
pid = pid >> 24;
tmp = pid;
tmp = tmp << 56;
id ^= tmp;
}
else {
tmp = pid;
tmp = tmp << 40;
id ^= tmp;
}
#if APR_HAS_THREADS
{
apr_uintptr_t tmp2 = (apr_uintptr_t)c->current_thread;
tmp = tmp2;
tmp = tmp << 32;
id ^= tmp;
}
#endif
len = apr_base64_encode_len(sizeof(id)); /* includes trailing \0 */
encoded = apr_palloc(r ? r->pool : c->pool, len);
apr_base64_encode(encoded, (char *)&id, sizeof(id));
/* Skip the last char, it is always '=' */
encoded[len - 2] = '\0';
*idstring = encoded;
return OK;
}
static void add_log_id(const conn_rec *c, const request_rec *r)
{
const char **id;
/* need to cast const away */
if (r) {
id = &((request_rec *)r)->log_id;
}
else {
id = &((conn_rec *)c)->log_id;
}
ap_run_generate_log_id(c, r, id);
}
AP_DECLARE(void) ap_register_log_hooks(apr_pool_t *p)
{
ap_hook_generate_log_id(core_generate_log_id, NULL, NULL,
APR_HOOK_REALLY_LAST);
ap_register_errorlog_handler(p, "a", log_remote_address, 0);
ap_register_errorlog_handler(p, "A", log_local_address, 0);
ap_register_errorlog_handler(p, "e", log_env_var, 0);
ap_register_errorlog_handler(p, "E", log_apr_status, 0);
ap_register_errorlog_handler(p, "F", log_file_line, 0);
ap_register_errorlog_handler(p, "i", log_header, 0);
ap_register_errorlog_handler(p, "k", log_keepalives, 0);
ap_register_errorlog_handler(p, "l", log_loglevel, 0);
ap_register_errorlog_handler(p, "L", log_log_id, 0);
ap_register_errorlog_handler(p, "m", log_module_name, 0);
ap_register_errorlog_handler(p, "n", log_note, 0);
ap_register_errorlog_handler(p, "P", log_pid, 0);
ap_register_errorlog_handler(p, "t", log_ctime, 0);
ap_register_errorlog_handler(p, "T", log_tid, 0);
ap_register_errorlog_handler(p, "v", log_virtual_host, 0);
ap_register_errorlog_handler(p, "V", log_server_name, 0);
}
/*
* This is used if no error log format is defined and during startup.
* It automatically omits the timestamp if logging to syslog.
*/
static int do_errorlog_default(const ap_errorlog_info *info, char *buf,
int buflen, int *errstr_start, int *errstr_end,
const char *errstr_fmt, va_list args)
{
int len = 0;
int field_start = 0;
int item_len;
#ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED
char scratch[MAX_STRING_LEN];
#endif
if (!info->using_syslog && !info->startup) {
buf[len++] = '[';
len += log_ctime(info, "u", buf + len, buflen - len);
buf[len++] = ']';
buf[len++] = ' ';
}
if (!info->startup) {
buf[len++] = '[';
len += log_module_name(info, NULL, buf + len, buflen - len);
buf[len++] = ':';
len += log_loglevel(info, NULL, buf + len, buflen - len);
len += cpystrn(buf + len, "] [pid ", buflen - len);
len += log_pid(info, NULL, buf + len, buflen - len);
#if APR_HAS_THREADS
field_start = len;
len += cpystrn(buf + len, ":tid ", buflen - len);
item_len = log_tid(info, NULL, buf + len, buflen - len);
if (!item_len)
len = field_start;
else
len += item_len;
#endif
buf[len++] = ']';
buf[len++] = ' ';
}
if (info->level >= APLOG_DEBUG) {
item_len = log_file_line(info, NULL, buf + len, buflen - len);
if (item_len) {
len += item_len;
len += cpystrn(buf + len, ": ", buflen - len);
}
}
if (info->status) {
item_len = log_apr_status(info, NULL, buf + len, buflen - len);
if (item_len) {
len += item_len;
len += cpystrn(buf + len, ": ", buflen - len);
}
}
/*
* useragent_ip/client_ip can be client or backend server. If we have
* a scoreboard handle, it is likely a client.
*/
if (info->r) {
len += apr_snprintf(buf + len, buflen - len,
info->r->connection->sbh ? "[client %s:%d] " : "[remote %s:%d] ",