diff options
Diffstat (limited to 'server/log.c')
| -rw-r--r-- | server/log.c | 987 |
1 files changed, 987 insertions, 0 deletions
diff --git a/server/log.c b/server/log.c new file mode 100644 index 00000000..057672f2 --- /dev/null +++ b/server/log.c @@ -0,0 +1,987 @@ +/* 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" + +#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 + +#define CORE_PRIVATE + +#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" + +typedef struct { + char *t_name; + int t_val; +} TRANS; + +APR_HOOK_STRUCT( + APR_HOOK_LINK(error_log) +) + +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}, + {NULL, -1}, +}; + +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; + +/* clear_handle_list() is called when plog is cleared; at that + * point we need to forget about our old list of pipe read + * handles + */ +static apr_status_t clear_handle_list(void *v) +{ + read_handles = NULL; + return APR_SUCCESS; +} + +/* remember to close this handle in the child process */ +static void close_handle_in_child(apr_pool_t *p, apr_file_t *f) +{ + 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; +} + +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, "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, + "%s: could not open error log file %s.", + ap_server_argv0, fname); + return rc; + } + if ((rc = apr_file_open_stderr(&stderr_log, p)) == APR_SUCCESS) { + apr_file_flush(stderr_log); + if ((rc = apr_file_dup2(stderr_log, stderr_file, p)) == APR_SUCCESS) { + apr_file_close(stderr_file); + } + } + if (rc != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_CRIT, rc, NULL, + "unable to replace stderr with error_log"); + } + 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, + "%s", description); +} + +static int log_child(apr_pool_t *p, const char *progname, + apr_file_t **fpin) +{ + /* 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; + + if (((rc = apr_procattr_create(&procattr, p)) == APR_SUCCESS) + && ((rc = apr_procattr_cmdtype_set(procattr, + APR_SHELLCMD_ENV)) == 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; + const char *pname; + + apr_tokenize_to_argv(progname, &args, p); + pname = apr_pstrdup(p, args[0]); + procnew = (apr_proc_t *)apr_pcalloc(p, sizeof(*procnew)); + rc = apr_proc_create(procnew, pname, (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; +} + +static int open_error_log(server_rec *s, apr_pool_t *p) +{ + const char *fname; + int rc; + + if (*s->error_fname == '|') { + apr_file_t *dummy = NULL; + + /* This starts a new process... */ + rc = log_child (p, s->error_fname + 1, &dummy); + if (rc != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL, + "Couldn't start ErrorLog process"); + return DONE; + } + + s->error_log = dummy; + } + +#ifdef HAVE_SYSLOG + else if (!strncasecmp(s->error_fname, "syslog", 6)) { + if ((fname = strchr(s->error_fname, ':'))) { + const TRANS *fac; + + fname++; + for (fac = facilities; fac->t_name; fac++) { + if (!strcasecmp(fname, fac->t_name)) { + openlog(ap_server_argv0, LOG_NDELAY|LOG_CONS|LOG_PID, + fac->t_val); + s->error_log = NULL; + return OK; + } + } + } + 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, + "%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, + "%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_status_t rc = APR_SUCCESS; + server_rec *virt, *q; + int replace_stderr; + apr_file_t *errfile = NULL; + + apr_pool_cleanup_register(p, NULL, clear_handle_list, + apr_pool_cleanup_null); + if (open_error_log(s_main, p) != OK) { + return DONE; + } + + replace_stderr = 1; + if (s_main->error_log) { + /* replace stderr with this new log */ + apr_file_flush(s_main->error_log); + if ((rc = apr_file_open_stderr(&errfile, p)) == APR_SUCCESS) { + rc = apr_file_dup2(errfile, s_main->error_log, p); + } + if (rc != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_CRIT, rc, s_main, + "unable to replace stderr with error_log"); + } + else { + replace_stderr = 0; + } + } + /* 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 + */ + if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) { + ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main, + "unable to replace stderr with /dev/null"); + } + + 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, 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 void log_error_core(const char *file, int line, 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]; +#ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED + char scratch[MAX_STRING_LEN]; +#endif + apr_size_t len, errstrlen; + apr_file_t *logf = NULL; + const char *referer; + int level_and_mask = level & APLOG_LEVELMASK; + + if (r && r->connection) { + 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 + */ + if ((level_and_mask != APLOG_NOTICE) + && (level_and_mask > ap_default_loglevel)) { + return; + } + + logf = stderr_log; + } + else if (s->error_log) { + /* + * If we are doing normal logging, don't log messages that are + * above the server log level unless it is a startup/shutdown notice + */ + if ((level_and_mask != APLOG_NOTICE) + && (level_and_mask > s->loglevel)) { + return; + } + + logf = s->error_log; + } +#ifdef TPF + else if (tpf_child) { + /* + * If we are doing normal logging, don't log messages that are + * above the server log level unless it is a startup/shutdown notice + */ + if ((level_and_mask != APLOG_NOTICE) + && (level_and_mask > s->loglevel)) { + return; + } + + logf = stderr; + } +#endif /* TPF */ + else { + /* + * If we are doing syslog logging, don't log messages that are + * above the server log level (including a startup/shutdown notice) + */ + if (level_and_mask > s->loglevel) { + return; + } + } + + if (logf && ((level & APLOG_STARTUP) != APLOG_STARTUP)) { + errstr[0] = '['; + ap_recent_ctime(errstr + 1, apr_time_now()); + errstr[1 + APR_CTIME_LEN - 1] = ']'; + errstr[1 + APR_CTIME_LEN ] = ' '; + len = 1 + APR_CTIME_LEN + 1; + } else { + len = 0; + } + + if ((level & APLOG_STARTUP) != APLOG_STARTUP) { + len += apr_snprintf(errstr + len, MAX_STRING_LEN - len, + "[%s] ", priorities[level_and_mask].t_name); + } + +#ifndef TPF + if (file && level_and_mask == APLOG_DEBUG) { +#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 */ + len += apr_snprintf(errstr + len, MAX_STRING_LEN - len, + "%s(%d): ", file, line); + } +#endif /* TPF */ + + if (c) { + /* XXX: TODO: add a method of selecting whether logged client + * addresses are in dotted quad or resolved form... dotted + * quad is the most secure, which is why I'm implementing it + * first. -djg + */ + len += apr_snprintf(errstr + len, MAX_STRING_LEN - len, + "[client %s] ", c->remote_ip); + } + if (status != 0) { + if (status < APR_OS_START_EAIERR) { + len += apr_snprintf(errstr + len, MAX_STRING_LEN - len, + "(%d)", status); + } + else if (status < APR_OS_START_SYSERR) { + len += apr_snprintf(errstr + len, MAX_STRING_LEN - len, + "(EAI %d)", status - APR_OS_START_EAIERR); + } + else if (status < 100000 + APR_OS_START_SYSERR) { + len += apr_snprintf(errstr + len, MAX_STRING_LEN - len, + "(OS %d)", status - APR_OS_START_SYSERR); + } + else { + len += apr_snprintf(errstr + len, MAX_STRING_LEN - len, + "(os 0x%08x)", status - APR_OS_START_SYSERR); + } + apr_strerror(status, errstr + len, MAX_STRING_LEN - len); + len += strlen(errstr + len); + if (MAX_STRING_LEN - len > 2) { + errstr[len++] = ':'; + errstr[len++] = ' '; + errstr[len] = '\0'; + } + } + + errstrlen = len; +#ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED + if (apr_vsnprintf(scratch, MAX_STRING_LEN - len, fmt, args)) { + len += ap_escape_errorlog_item(errstr + len, scratch, + MAX_STRING_LEN - len); + } +#else + len += apr_vsnprintf(errstr + len, MAX_STRING_LEN - len, fmt, args); +#endif + + if ( r && (referer = apr_table_get(r->headers_in, "Referer")) +#ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED + && ap_escape_errorlog_item(scratch, referer, MAX_STRING_LEN - len) +#endif + ) { + len += apr_snprintf(errstr + len, MAX_STRING_LEN - len, + ", referer: %s", +#ifndef AP_UNSAFE_ERROR_LOG_UNESCAPED + scratch +#else + referer +#endif + ); + } + + /* 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_and_mask, "%s", errstr); + } +#endif + + ap_run_error_log(file, line, level, status, s, r, pool, errstr + errstrlen); +} + +AP_DECLARE(void) ap_log_error(const char *file, int line, 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, level, status, s, NULL, NULL, NULL, fmt, args); + va_end(args); +} + +AP_DECLARE(void) ap_log_perror(const char *file, int line, 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, level, status, NULL, NULL, NULL, p, fmt, args); + va_end(args); +} + +AP_DECLARE(void) ap_log_rerror(const char *file, int line, 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, 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_cerror(const char *file, int line, 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, level, status, c->base_server, c, NULL, NULL, + fmt, args); + va_end(args); +} + +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; + + if (!filename) { + return; + } + + fname = ap_server_root_relative(p, filename); + if (!fname) { + ap_log_error(APLOG_MARK, APLOG_STARTUP|APLOG_CRIT, APR_EBADPATH, + NULL, "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, + "pid file %s overwritten -- Unclean " + "shutdown of previous Apache run?", + fname); + } + + if ((rv = apr_file_open(&pid_file, fname, + APR_WRITE | APR_CREATE | APR_TRUNCATE, + APR_UREAD | APR_UWRITE | APR_GREAD | APR_WREAD, p)) + != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, NULL, + "could not create %s", fname); + ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, + "%s: could not log pid to file %s", + ap_server_argv0, fname); + exit(1); + } + apr_file_printf(pid_file, "%ld" APR_EOL_STR, (long)mypid); + apr_file_close(pid_file); + 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, + NULL, "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, + "[%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_cmdtype_set(procattr, + APR_SHELLCMD_ENV)) != APR_SUCCESS) || + ((status = apr_procattr_child_in_set(procattr, + ap_piped_log_read_fd(pl), + ap_piped_log_write_fd(pl))) + != APR_SUCCESS) || + ((status = apr_procattr_child_errfn_set(procattr, log_child_errfn)) + != APR_SUCCESS) || + ((status = apr_procattr_error_check_set(procattr, 1)) != APR_SUCCESS)) { + char buf[120]; + /* Something bad happened, give up and go away. */ + ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, + "piped_log_spawn: unable to setup child process '%s': %s", + pl->program, apr_strerror(status, buf, sizeof(buf))); + } + else { + char **args; + const char *pname; + + apr_tokenize_to_argv(pl->program, &args, pl->p); + pname = apr_pstrdup(pl->p, args[0]); + procnew = apr_pcalloc(pl->p, sizeof(apr_proc_t)); + status = apr_proc_create(procnew, pname, (const char * const *) args, + NULL, procattr, pl->p); + + if (status == APR_SUCCESS) { + pl->pid = procnew; + /* procnew->in was dup2'd from ap_piped_log_write_fd(pl); + * 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, + ap_piped_log_write_fd(pl), pl->p); + close_handle_in_child(pl->p, ap_piped_log_read_fd(pl)); + } + else { + char buf[120]; + /* Something bad happened, give up and go away. */ + ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, + "unable to start piped log program '%s': %s", + pl->program, apr_strerror(status, buf, sizeof(buf))); + } + } + + return status; +} + + +static void piped_log_maintenance(int reason, void *data, apr_wait_t status) +{ + piped_log *pl = data; + apr_status_t stats; + 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); + stats = ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state); + if (stats != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, + "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, + "piped log program '%s' failed unexpectedly", + pl->program); + if ((stats = piped_log_spawn(pl)) != APR_SUCCESS) { + /* what can we do? This could be the error log we're having + * problems opening up... */ + char buf[120]; + ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, + "piped_log_maintenance: unable to respawn '%s': %s", + pl->program, apr_strerror(stats, buf, sizeof(buf))); + } + } + 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(ap_piped_log_read_fd(pl)); + apr_file_close(ap_piped_log_write_fd(pl)); + 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(apr_pool_t *p, const char *program) +{ + piped_log *pl; + + pl = apr_palloc(p, sizeof (*pl)); + pl->p = p; + pl->program = apr_pstrdup(p, program); + pl->pid = NULL; + if (apr_file_pipe_create(&ap_piped_log_read_fd(pl), + &ap_piped_log_write_fd(pl), 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(ap_piped_log_read_fd(pl)); + apr_file_close(ap_piped_log_write_fd(pl)); + 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(ap_piped_log_write_fd(pl)); + return APR_SUCCESS; +} + +AP_DECLARE(piped_log *) ap_open_piped_log(apr_pool_t *p, const char *program) +{ + piped_log *pl; + apr_file_t *dummy = NULL; + int rc; + + rc = log_child(p, program, &dummy); + if (rc != APR_SUCCESS) { + ap_log_error(APLOG_MARK, APLOG_STARTUP, rc, NULL, + "Couldn't start piped log process"); + return NULL; + } + + pl = apr_palloc(p, sizeof (*pl)); + pl->p = p; + ap_piped_log_read_fd(pl) = NULL; + ap_piped_log_write_fd(pl) = dummy; + apr_pool_cleanup_register(p, pl, piped_log_cleanup, piped_log_cleanup); + + return pl; +} + +#endif + +AP_DECLARE(void) ap_close_piped_log(piped_log *pl) +{ + apr_pool_cleanup_run(pl->p, pl, piped_log_cleanup); +} + +AP_IMPLEMENT_HOOK_VOID(error_log, + (const char *file, int line, int level, + apr_status_t status, const server_rec *s, + const request_rec *r, apr_pool_t *pool, + const char *errstr), (file, line, level, + status, s, r, pool, errstr)) + |