| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Apache/server/ (Apache Software Stiftung Version 2.4.65©) Datei vom 21.5.2024 mit Größe 62 kB |
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Quelle log.c Sprache: C |
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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" #ifdef HAVE_SYS_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 #ifndef DEFAULT_LOG_TID #define DEFAULT_LOG_TID NULL #endif 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, ap_server_conf, 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, ap_server_conf, 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 destroy 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 child's 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); } if (rc == APR_SUCCESS) { 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, ap_server_conf, APLOGNO(00089) "Couldn't start ErrorLog process '%s'.", s->error_fname + 1); return DONE; } s->error_log = dummy; } #ifdef HAVE_SYSLOG else if (strcmp(s->error_fname, "syslog") == 0 || strncmp(s->error_fname, "syslog:", 7) == 0) { 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, ap_server_conf, 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, ap_server_conf, 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 defined(HAVE_GETTID) || defined(HAVE_SYS_GETTID) if (arg && *arg == 'g') { #ifdef HAVE_GETTID pid_t tid = gettid(); #else pid_t tid = syscall(SYS_gettid); #endif if (tid == -1) return 0; return apr_snprintf(buf, buflen, "%"APR_PID_T_FMT, tid); } #endif /* HAVE_GETTID || HAVE_SYS_GETTID */ #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; if (arg) { if (arg[0] == 'u' && !arg[1]) { /* no ErrorLogFormat (fast path) */ option |= AP_CTIME_OPTION_USEC; } else if (!ap_strchr_c(arg, '%')) { /* special "%{cuz}t" formats */ while (*arg) { switch (*arg++) { case 'u': option |= AP_CTIME_OPTION_USEC; break; case 'c': option |= AP_CTIME_OPTION_COMPACT; break; case 'z': option |= AP_CTIME_OPTION_GMTOFF; break; } } } else { /* "%{strftime %-format}t" */ apr_size_t len = 0; apr_time_exp_t expt; ap_explode_recent_localtime(&expt, apr_time_now()); apr_strftime(buf, &len, buflen, arg, &expt); return (int)len; } } 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, DEFAULT_LOG_TID, 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] ", info->r->useragent_ip, info->r->useragent_addr ? info->r->useragent_addr->port : 0); } else if (info->c) { len += apr_snprintf(buf + len, buflen - len, info->c->sbh ? "[client %s:%d] " : "[remote %s:%d] ", info->c->client_ip, info->c->client_addr ? info->c->client_addr->port : 0); } /* the actual error message */ *errstr_start = len; #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED if (apr_vsnprintf(scratch, MAX_STRING_LEN, errstr_fmt, args)) { len += ap_escape_errorlog_item(buf + len, scratch, buflen - len); } #else len += apr_vsnprintf(buf + len, buflen - len, errstr_fmt, args); #endif *errstr_end = len; field_start = len; len += cpystrn(buf + len, ", referer: ", buflen - len); item_len = log_header(info, "Referer", buf + len, buflen - len); if (item_len) len += item_len; else len = field_start; return len; } static int do_errorlog_format(apr_array_header_t *fmt, ap_errorlog_info *info, char *buf, int buflen, int *errstr_start, int *errstr_end, const char *err_fmt, va_list args) { #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED char scratch[MAX_STRING_LEN]; #endif int i; int len = 0; int field_start = 0; int skipping = 0; ap_errorlog_format_item *items = (ap_errorlog_format_item *)fmt->elts; AP_DEBUG_ASSERT(fmt->nelts > 0); for (i = 0; i < fmt->nelts; ++i) { ap_errorlog_format_item *item = &items[i]; if (item->flags & AP_ERRORLOG_FLAG_FIELD_SEP) { if (skipping) { skipping = 0; } else { field_start = len; } } if (item->flags & AP_ERRORLOG_FLAG_MESSAGE) { /* the actual error message */ *errstr_start = len; #ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED if (apr_vsnprintf(scratch, MAX_STRING_LEN, err_fmt, args)) { len += ap_escape_errorlog_item(buf + len, scratch, buflen - len); } #else len += apr_vsnprintf(buf + len, buflen - len, err_fmt, args); #endif *errstr_end = len; } else if (skipping) { continue; } else if (info->level != -1 && (int)item->min_loglevel > info->level) { len = field_start; skipping = 1; } else { int item_len = (*item->func)(info, item->arg, buf + len, buflen - len); if (!item_len) { if (item->flags & AP_ERRORLOG_FLAG_REQUIRED) { /* required item is empty. skip whole line */ buf[0] = '\0'; return 0; } else if (item->flags & AP_ERRORLOG_FLAG_NULL_AS_HYPHEN) { buf[len++] = '-'; } else { len = field_start; skipping = 1; } } else { len += item_len; } } } return len; } static void write_logline(char *errstr, apr_size_t len, apr_file_t *logf, int level) { /* NULL if we are logging to syslog */ if (logf) { /* Truncate for the terminator (as apr_snprintf does) */ if (len > MAX_STRING_LEN - sizeof(APR_EOL_STR)) { len = MAX_STRING_LEN - sizeof(APR_EOL_STR); } strcpy(errstr + len, APR_EOL_STR); apr_file_puts(errstr, logf); apr_file_flush(logf); } #ifdef HAVE_SYSLOG else { syslog(level < LOG_PRIMASK ? level : APLOG_DEBUG, "%.*s", (int)len, errstr); } #endif } static void log_error_core(const char *file, int line, int module_index, int level, apr_status_t status, const server_rec *s, const conn_rec *c, const request_rec *r, apr_pool_t *pool, const char *fmt, va_list args) { char errstr[MAX_STRING_LEN]; apr_file_t *logf = NULL; int level_and_mask = level & APLOG_LEVELMASK; const request_rec *rmain = NULL; core_server_config *sconf = NULL; ap_errorlog_info info; /* do we need to log once-per-req or once-per-conn info? */ int log_conn_info = 0, log_req_info = 0; apr_array_header_t **lines = NULL; int done = 0; int line_number = 0; if (r) { AP_DEBUG_ASSERT(r->connection != NULL); c = r->connection; } if (s == NULL) { /* * If we are doing stderr logging (startup), don't log messages that are * above the default server log level unless it is a startup/shutdown * notice */ #ifndef DEBUG if ((level_and_mask != APLOG_NOTICE) && (level_and_mask > ap_default_loglevel)) { return; } #endif logf = stderr_log; /* Use the main ErrorLogFormat if any */ if (ap_server_conf) { sconf = ap_get_core_module_config(ap_server_conf->module_config); } } else { int configured_level = r ? ap_get_request_module_loglevel(r, module_index) : c ? ap_get_conn_server_module_loglevel(c, s, module_index) : ap_get_server_module_loglevel(s, module_index); if (s->error_log) { /* * If we are doing normal logging, don't log messages that are * above the module's log level unless it is a startup/shutdown notice */ if ((level_and_mask != APLOG_NOTICE) && (level_and_mask > configured_level)) { return; } logf = s->error_log; } else { /* * If we are doing syslog logging, don't log messages that are * above the module's log level (including a startup/shutdown notice) */ if (level_and_mask > configured_level) { return; } } /* the faked server_rec from mod_cgid does not have s->module_config */ if (s->module_config) { sconf = ap_get_core_module_config(s->module_config); if (c && !c->log_id) { add_log_id(c, NULL); if (sconf->error_log_conn && sconf->error_log_conn->nelts > 0) log_conn_info = 1; } if (r) { if (r->main) rmain = r->main; else rmain = r; if (!rmain->log_id) { /* XXX: do we need separate log ids for subrequests? */ if (sconf->error_log_req && sconf->error_log_req->nelts > 0) log_req_info = 1; /* * XXX: potential optimization: only create log id if %L is * XXX: actually used */ add_log_id(c, rmain); } } } else if (ap_server_conf) { /* Use the main ErrorLogFormat if any */ sconf = ap_get_core_module_config(ap_server_conf->module_config); } } info.s = s; info.c = c; info.pool = pool; info.file = NULL; info.line = 0; info.status = 0; info.using_syslog = (logf == NULL); info.startup = ((level & APLOG_STARTUP) == APLOG_STARTUP); info.format = fmt; while (!done) { apr_array_header_t *log_format; int len = 0, errstr_start = 0, errstr_end = 0; /* XXX: potential optimization: format common prefixes only once */ if (log_conn_info) { /* once-per-connection info */ if (line_number == 0) { lines = (apr_array_header_t **)sconf->error_log_conn->elts; info.r = NULL; info.rmain = NULL; info.level = -1; info.module_index = APLOG_NO_MODULE; } log_format = lines[line_number++]; if (line_number == sconf->error_log_conn->nelts) { /* this is the last line of once-per-connection info */ line_number = 0; log_conn_info = 0; } } else if (log_req_info) { /* once-per-request info */ if (line_number == 0) { lines = (apr_array_header_t **)sconf->error_log_req->elts; info.r = rmain; info.rmain = rmain; info.level = -1; info.module_index = APLOG_NO_MODULE; } log_format = lines[line_number++]; if (line_number == sconf->error_log_req->nelts) { /* this is the last line of once-per-request info */ line_number = 0; log_req_info = 0; } } else { /* the actual error message */ info.r = r; info.rmain = rmain; info.level = level_and_mask; info.module_index = module_index; info.file = file; info.line = line; info.status = status; log_format = sconf ? sconf->error_log_format : NULL; done = 1; } /* * prepare and log one line */ if (log_format && !info.startup) { len += do_errorlog_format(log_format, &info, errstr + len, MAX_STRING_LEN - len, &errstr_start, &errstr_end, fmt, args); } else { len += do_errorlog_default(&info, errstr + len, MAX_STRING_LEN - len, &errstr_start, &errstr_end, fmt, args); } if (!*errstr) { /* * Don't log empty lines. This can happen with once-per-conn/req * info if an item with AP_ERRORLOG_FLAG_REQUIRED is NULL. */ continue; } write_logline(errstr, len, logf, level_and_mask); if (done) { /* * We don't call the error_log hook for per-request/per-conn * lines, and we only pass the actual log message, not the * prefix and suffix. */ errstr[errstr_end] = '\0'; ap_run_error_log(&info, errstr + errstr_start); } *errstr = '\0'; } } /* For internal calls to log_error_core with self-composed arg lists */ static void log_error_va_glue(const char *file, int line, int module_index, int level, apr_status_t status, const server_rec *s, const conn_rec *c, const request_rec *r, apr_pool_t *pool, const char *fmt, ...) { va_list args; va_start(args, fmt); log_error_core(file, line, module_index, level, status, s, c, r, pool, fmt, args); va_end(args); } AP_DECLARE(void) ap_log_error_(const char *file, int line, int module_index, int level, apr_status_t status, const server_rec *s, const char *fmt, ...) { va_list args; va_start(args, fmt); log_error_core(file, line, module_index, level, status, s, NULL, NULL, NULL, fmt, args); va_end(args); } AP_DECLARE(void) ap_log_perror_(const char *file, int line, int module_index, int level, apr_status_t status, apr_pool_t *p, const char *fmt, ...) { va_list args; va_start(args, fmt); log_error_core(file, line, module_index, level, status, NULL, NULL, NULL, p, fmt, args); va_end(args); } AP_DECLARE(void) ap_log_rerror_(const char *file, int line, int module_index, int level, apr_status_t status, const request_rec *r, const char *fmt, ...) { va_list args; va_start(args, fmt); log_error_core(file, line, module_index, level, status, r->server, NULL, r, NULL, fmt, args); /* * IF APLOG_TOCLIENT is set, * AND the error level is 'warning' or more severe, * AND there isn't already error text associated with this request, * THEN make the message text available to ErrorDocument and * other error processors. */ va_end(args); va_start(args,fmt); if ((level & APLOG_TOCLIENT) && ((level & APLOG_LEVELMASK) <= APLOG_WARNING) && (apr_table_get(r->notes, "error-notes") == NULL)) { apr_table_setn(r->notes, "error-notes", ap_escape_html(r->pool, apr_pvsprintf(r->pool, fmt, args))); } va_end(args); } AP_DECLARE(void) ap_log_cserror_(const char *file, int line, int module_index, int level, apr_status_t status, const conn_rec *c, const server_rec *s, const char *fmt, ...) { va_list args; va_start(args, fmt); log_error_core(file, line, module_index, level, status, s, c, NULL, NULL, fmt, args); va_end(args); } AP_DECLARE(void) ap_log_cerror_(const char *file, int line, int module_index, int level, apr_status_t status, const conn_rec *c, const char *fmt, ...) { va_list args; va_start(args, fmt); log_error_core(file, line, module_index, level, status, c->base_server, c, NULL, NULL, fmt, args); va_end(args); } #define BYTES_LOGGED_PER_LINE 16 #define LOG_BYTES_BUFFER_SIZE (BYTES_LOGGED_PER_LINE * 3 + 2) static void fmt_data(unsigned char *buf, const void *vdata, apr_size_t len, apr_size_t *off { const unsigned char *data = (const unsigned char *)vdata; unsigned char *chars; unsigned char *hex; apr_size_t this_time = 0; memset(buf, ' ', LOG_BYTES_BUFFER_SIZE - 1); buf[LOG_BYTES_BUFFER_SIZE - 1] = '\0'; chars = buf; /* start character dump here */ hex = buf + BYTES_LOGGED_PER_LINE + 1; /* start hex dump here */ while (*off < len && this_time < BYTES_LOGGED_PER_LINE) { unsigned char c = data[*off]; if (apr_isprint(c) && c != '\\') { /* backslash will be escaped later, which throws * off the formatting */ *chars = c; } else { *chars = '.'; } if ((c >> 4) >= 10) { *hex = 'a' + ((c >> 4) - 10); } else { *hex = '0' + (c >> 4); } if ((c & 0x0F) >= 10) { *(hex + 1) = 'a' + ((c & 0x0F) - 10); } else { *(hex + 1) = '0' + (c & 0x0F); } chars += 1; hex += 2; *off += 1; ++this_time; } } static void log_data_core(const char *file, int line, int module_index, int level, const server_rec *s, const conn_rec *c, const request_rec *r, const char *label, const void *data, apr_size_t len, unsigned int flags) { unsigned char buf[LOG_BYTES_BUFFER_SIZE]; apr_size_t off; char prefix[20]; if (!(flags & AP_LOG_DATA_SHOW_OFFSET)) { prefix[0] = '\0'; } if (len > 0xffff) { /* bug in caller? */ len = 0xffff; } if (label) { log_error_va_glue(file, line, module_index, level, APR_SUCCESS, s, c, r, NULL, "%s (%" APR_SIZE_T_FMT " bytes)", label, len); } off = 0; while (off < len) { if (flags & AP_LOG_DATA_SHOW_OFFSET) { apr_snprintf(prefix, sizeof prefix, "%04x: ", (unsigned int)off); } fmt_data(buf, data, len, &off); log_error_va_glue(file, line, module_index, level, APR_SUCCESS, s, c, r, NULL, "%s%s", prefix, buf); } } AP_DECLARE(void) ap_log_data_(const char *file, int line, int module_index, int level, const server_rec *s, const char *label, const void *data, apr_size_t len, unsigned int flags) { log_data_core(file, line, module_index, level, s, NULL, NULL, label, data, len, flags); } AP_DECLARE(void) ap_log_rdata_(const char *file, int line, int module_index, int level, const request_rec *r, const char *label, const void *data, apr_size_t len, unsigned int flags) { log_data_core(file, line, module_index, level, r->server, NULL, r, label, data, len, flags); } AP_DECLARE(void) ap_log_cdata_(const char *file, int line, int module_index, int level, const conn_rec *c, const char *label, const void *data, apr_size_t len, unsigned int flags) { log_data_core(file, line, module_index, level, c->base_server, c, NULL, label, data, len, flags); } AP_DECLARE(void) ap_log_csdata_(const char *file, int line, int module_index, int level, const conn_rec *c, const server_rec *s, const char *label, const void *data, apr_size_t len, unsigned int flags) { log_data_core(file, line, module_index, level, s, c, NULL, label, data, len, flags); } AP_DECLARE(void) ap_log_command_line(apr_pool_t *plog, server_rec *s) { int i; process_rec *process = s->process; char *result; int len_needed = 0; /* Piece together the command line from the pieces * in process->argv, with spaces in between. */ for (i = 0; i < process->argc; i++) { len_needed += strlen(process->argv[i]) + 1; } result = (char *) apr_palloc(plog, len_needed); *result = '\0'; for (i = 0; i < process->argc; i++) { strcat(result, process->argv[i]); if ((i+1)< process->argc) { strcat(result, " "); } } ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s, APLOGNO(00094) "Command line: '%s'", result); } /* grab bag function to log commonly logged and shared info */ AP_DECLARE(void) ap_log_mpm_common(server_rec *s) { ap_log_error(APLOG_MARK, APLOG_DEBUG , 0, s, APLOGNO(02639) "Using SO_REUSEPORT: %s (%d)", ap_have_so_reuseport ? "yes" : "no", ap_num_listen_buckets); } AP_DECLARE(void) ap_remove_pid(apr_pool_t *p, const char *rel_fname) { apr_status_t rv; const char *fname = ap_server_root_relative(p, rel_fname); if (fname != NULL) { rv = apr_file_remove(fname, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, APLOGNO(00095) "failed to remove PID file %s", fname); } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, ap_server_conf, APLOGNO(00096) "removed PID file %s (pid=%" APR_PID_T_FMT ")", fname, getpid()); } } } AP_DECLARE(void) ap_log_pid(apr_pool_t *p, const char *filename) { apr_file_t *pid_file = NULL; apr_finfo_t finfo; static pid_t saved_pid = -1; pid_t mypid; apr_status_t rv; const char *fname; char *temp_fname; apr_fileperms_t perms; char pidstr[64]; if (!filename) { return; } fname = ap_server_root_relative(p, filename); if (!fname) { ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH, ap_server_conf, APLOGNO(00097) "Invalid PID file path %s, ignoring.", filename); return; } mypid = getpid(); if (mypid != saved_pid && apr_stat(&finfo, fname, APR_FINFO_MTIME, p) == APR_SUCCESS) { /* AP_SIG_GRACEFUL and HUP call this on each restart. * Only warn on first time through for this pid. * * XXX: Could just write first time through too, although * that may screw up scripts written to do something * based on the last modification time of the pid file. */ ap_log_perror(APLOG_MARK, APLOG_WARNING, 0, p, APLOGNO(00098) "pid file %s overwritten -- Unclean " "shutdown of previous Apache run?", fname); } temp_fname = apr_pstrcat(p, fname, ".XXXXXX", NULL); rv = apr_file_mktemp(&pid_file, temp_fname, APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_TRUNCATE, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, APLOGNO(00099) "could not create %s", temp_fname); ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, APLOGNO(00100) "%s: could not log pid to file %s", ap_server_argv0, fname); exit(1); } apr_snprintf(pidstr, sizeof pidstr, "%" APR_PID_T_FMT APR_EOL_STR, mypid); perms = APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD; if (((rv = apr_file_perms_set(temp_fname, perms)) != APR_SUCCESS && rv != APR_ENOTIMPL) || (rv = apr_file_write_full(pid_file, pidstr, strlen(pidstr), NULL)) != APR_SUCCESS || (rv = apr_file_close(pid_file)) != APR_SUCCESS || (rv = apr_file_rename(temp_fname, fname, p)) != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, APLOGNO(10231) "%s: Failed creating pid file %s", ap_server_argv0, temp_fname); exit(1); } saved_pid = mypid; } AP_DECLARE(apr_status_t) ap_read_pid(apr_pool_t *p, const char *filename, pid_t *mypid) { const apr_size_t BUFFER_SIZE = sizeof(long) * 3 + 2; /* see apr_ltoa */ apr_file_t *pid_file = NULL; apr_status_t rv; const char *fname; char *buf, *endptr; apr_size_t bytes_read; if (!filename) { return APR_EGENERAL; } fname = ap_server_root_relative(p, filename); if (!fname) { ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH, ap_server_conf, APLOGNO(00101) "Invalid PID file path %s, ignoring.", filename); return APR_EGENERAL; } rv = apr_file_open(&pid_file, fname, APR_READ, APR_OS_DEFAULT, p); if (rv != APR_SUCCESS) { return rv; } buf = apr_palloc(p, BUFFER_SIZE); rv = apr_file_read_full(pid_file, buf, BUFFER_SIZE - 1, &bytes_read); if (rv != APR_SUCCESS && rv != APR_EOF) { return rv; } /* If we fill the buffer, we're probably reading a corrupt pid file. * To be nice, let's also ensure the first char is a digit. */ if (bytes_read == 0 || bytes_read == BUFFER_SIZE - 1 || !apr_isdigit(*buf)) { return APR_EGENERAL; } buf[bytes_read] = '\0'; *mypid = strtol(buf, &endptr, 10); apr_file_close(pid_file); return APR_SUCCESS; } AP_DECLARE(void) ap_log_assert(const char *szExp, const char *szFile, int nLine) { char time_str[APR_CTIME_LEN]; apr_ctime(time_str, apr_time_now()); ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL, APLOGNO(00102) "[%s] file %s, line %d, assertion \"%s\" failed", time_str, szFile, nLine, szExp); #if defined(WIN32) DebugBreak(); #else /* unix assert does an abort leading to a core dump */ abort(); #endif } /* piped log support */ #ifdef AP_HAVE_RELIABLE_PIPED_LOGS /* forward declaration */ static void piped_log_maintenance(int reason, void *data, apr_wait_t status); /* Spawn the piped logger process pl->program. */ static apr_status_t piped_log_spawn(piped_log *pl) { apr_procattr_t *procattr; apr_proc_t *procnew = NULL; apr_status_t status; if (((status = apr_procattr_create(&procattr, pl->p)) != APR_SUCCESS) || ((status = apr_procattr_dir_set(procattr, ap_server_root)) != APR_SUCCESS) || ((status = apr_procattr_cmdtype_set(procattr, pl->cmdtype)) != APR_SUCCESS) || ((status = apr_procattr_child_in_set(procattr, pl->read_fd, pl->write_fd)) != APR_SUCCESS) || ((status = apr_procattr_child_errfn_set(procattr, log_child_errfn)) != APR_SUCCESS) || ((status = apr_procattr_error_check_set(procattr, 1)) != APR_SUCCESS)) { /* Something bad happened, give up and go away. */ ap_log_error(APLOG_MARK, APLOG_STARTUP, status, ap_server_conf, APLOGNO(00103) "piped_log_spawn: unable to setup child process '%s'", pl->program); } else { char **args; apr_tokenize_to_argv(pl->program, &args, pl->p); procnew = apr_pcalloc(pl->p, sizeof(apr_proc_t)); status = apr_proc_create(procnew, args[0], (const char * const *) args, NULL, procattr, pl->p); if (status == APR_SUCCESS) { pl->pid = procnew; /* procnew->in was dup2'd from pl->write_fd; * since the original fd is still valid, close the copy to * avoid a leak. */ apr_file_close(procnew->in); procnew->in = NULL; apr_proc_other_child_register(procnew, piped_log_maintenance, pl, pl->write_fd, pl->p); close_handle_in_child(pl->p, pl->read_fd); } else { /* Something bad happened, give up and go away. */ ap_log_error(APLOG_MARK, APLOG_STARTUP, status, ap_server_conf, APLOGNO(00104) "unable to start piped log program '%s'", pl->program); } } return status; } static void piped_log_maintenance(int reason, void *data, apr_wait_t status) { piped_log *pl = data; apr_status_t rv; int mpm_state; switch (reason) { case APR_OC_REASON_DEATH: case APR_OC_REASON_LOST: pl->pid = NULL; /* in case we don't get it going again, this * tells other logic not to try to kill it */ apr_proc_other_child_unregister(pl); rv = ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00105) "can't query MPM state; not restarting " "piped log program '%s'", pl->program); } else if (mpm_state != AP_MPMQ_STOPPING) { ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00106) "piped log program '%s' failed unexpectedly", pl->program); if ((rv = piped_log_spawn(pl)) != APR_SUCCESS) { /* what can we do? This could be the error log we're having * problems opening up... */ ap_log_error(APLOG_MARK, APLOG_STARTUP, rv, NULL, APLOGNO(00107) "piped_log_maintenance: unable to respawn '%s'", pl->program); } } break; case APR_OC_REASON_UNWRITABLE: /* We should not kill off the pipe here, since it may only be full. * If it really is locked, we should kill it off manually. */ break; case APR_OC_REASON_RESTART: if (pl->pid != NULL) { apr_proc_kill(pl->pid, SIGTERM); pl->pid = NULL; } break; case APR_OC_REASON_UNREGISTER: break; } } static apr_status_t piped_log_cleanup_for_exec(void *data) { piped_log *pl = data; apr_file_close(pl->read_fd); apr_file_close(pl->write_fd); return APR_SUCCESS; } static apr_status_t piped_log_cleanup(void *data) { piped_log *pl = data; if (pl->pid != NULL) { apr_proc_kill(pl->pid, SIGTERM); } return piped_log_cleanup_for_exec(data); } AP_DECLARE(piped_log *) ap_open_piped_log_ex(apr_pool_t *p, const char *program, apr_cmdtype_e cmdtype) { piped_log *pl; pl = apr_palloc(p, sizeof (*pl)); pl->p = p; pl->program = apr_pstrdup(p, program); pl->pid = NULL; pl->cmdtype = cmdtype; if (apr_file_pipe_create_ex(&pl->read_fd, &pl->write_fd, APR_FULL_BLOCK, p) != APR_SUCCESS) { return NULL; } apr_pool_cleanup_register(p, pl, piped_log_cleanup, piped_log_cleanup_for_exec); if (piped_log_spawn(pl) != APR_SUCCESS) { apr_pool_cleanup_kill(p, pl, piped_log_cleanup); apr_file_close(pl->read_fd); apr_file_close(pl->write_fd); return NULL; } return pl; } #else /* !AP_HAVE_RELIABLE_PIPED_LOGS */ static apr_status_t piped_log_cleanup(void *data) { piped_log *pl = data; apr_file_close(pl->write_fd); return APR_SUCCESS; } AP_DECLARE(piped_log *) ap_open_piped_log_ex(apr_pool_t *p, const char *program, apr_cmdtype_e cmdtype) { piped_log *pl; apr_file_t *dummy = NULL; int rc; rc = log_child(p, program, &dummy, cmdtype, 0); if (rc != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, ap_server_conf, APLOGNO(00108) "Couldn't start piped log process '%s'.", (program == NULL) ? "NULL" : program); return NULL; } pl = apr_palloc(p, sizeof (*pl)); pl->p = p; pl->read_fd = NULL; pl->write_fd = dummy; apr_pool_cleanup_register(p, pl, piped_log_cleanup, piped_log_cleanup); return pl; } #endif AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program) { apr_cmdtype_e cmdtype = APR_PROGRAM_ENV; /* 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 "|$cmd" to ease conversion. */ if (*program == '|') ++program; if (*program == '$') { cmdtype = APR_SHELLCMD_ENV; ++program; } return ap_open_piped_log_ex(p, program, cmdtype); } AP_DECLARE(void) ap_close_piped_log(piped_log *pl) { apr_pool_cleanup_run(pl->p, pl, piped_log_cleanup); } AP_DECLARE(const char *) ap_parse_log_level(const char *str, int *val) { const char *err = "Log level keyword must be one of emerg/alert/crit/error/" "warn/notice/info/debug/trace1/.../trace8"; int i = 0; if (str == NULL) return err; while (priorities[i].t_name != NULL) { if (!strcasecmp(str, priorities[i].t_name)) { *val = priorities[i].t_val; return NULL; } i++; } return err; } AP_IMPLEMENT_HOOK_VOID(error_log, (const ap_errorlog_info *info, const char *errstr), (info, errstr)) AP_IMPLEMENT_HOOK_RUN_FIRST(int, generate_log_id, (const conn_rec *c, const request_rec *r, const char **id), (c, r, id), DECLINED) ¤ Dauer der Verarbeitung: 0.39 Sekunden (vorverarbeitet) ¤*© Formatika GbR, Deutschland |
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2026-03-28