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src/core/ngx_log.c - nginx-1.7.10
Global variables defined
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- static char *ngx_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
- static char *ngx_log_set_levels(ngx_conf_t *cf, ngx_log_t *log);
- static void ngx_log_insert(ngx_log_t *log, ngx_log_t *new_log);
- static ngx_command_t ngx_errlog_commands[] = {
- {ngx_string("error_log"),
- NGX_MAIN_CONF|NGX_CONF_1MORE,
- ngx_error_log,
- 0,
- 0,
- NULL},
- ngx_null_command
- };
- static ngx_core_module_t ngx_errlog_module_ctx = {
- ngx_string("errlog"),
- NULL,
- NULL
- };
- ngx_module_t ngx_errlog_module = {
- NGX_MODULE_V1,
- &ngx_errlog_module_ctx,
- ngx_errlog_commands,
- NGX_CORE_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NGX_MODULE_V1_PADDING
- };
- static ngx_log_t ngx_log;
- static ngx_open_file_t ngx_log_file;
- ngx_uint_t ngx_use_stderr = 1;
- static ngx_str_t err_levels[] = {
- ngx_null_string,
- ngx_string("emerg"),
- ngx_string("alert"),
- ngx_string("crit"),
- ngx_string("error"),
- ngx_string("warn"),
- ngx_string("notice"),
- ngx_string("info"),
- ngx_string("debug")
- };
- static const char *debug_levels[] = {
- "debug_core", "debug_alloc", "debug_mutex", "debug_event",
- "debug_http", "debug_mail", "debug_mysql"
- };
- #if (NGX_HAVE_VARIADIC_MACROS)
- void
- ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
- const char *fmt, ...)
- #else
- void
- ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
- const char *fmt, va_list args)
- #endif
- {
- #if (NGX_HAVE_VARIADIC_MACROS)
- va_list args;
- #endif
- u_char *p, *last, *msg;
- ssize_t n;
- ngx_uint_t wrote_stderr, debug_connection;
- u_char errstr[NGX_MAX_ERROR_STR];
- last = errstr + NGX_MAX_ERROR_STR;
- ngx_memcpy(errstr, ngx_cached_err_log_time.data,
- ngx_cached_err_log_time.len);
- p = errstr + ngx_cached_err_log_time.len;
- p = ngx_slprintf(p, last, " [%V] ", &err_levels[level]);
-
- p = ngx_slprintf(p, last, "%P#" NGX_TID_T_FMT ": ",
- ngx_log_pid, ngx_log_tid);
- if (log->connection) {
- p = ngx_slprintf(p, last, "*%uA ", log->connection);
- }
- msg = p;
- #if (NGX_HAVE_VARIADIC_MACROS)
- va_start(args, fmt);
- p = ngx_vslprintf(p, last, fmt, args);
- va_end(args);
- #else
- p = ngx_vslprintf(p, last, fmt, args);
- #endif
- if (err) {
- p = ngx_log_errno(p, last, err);
- }
- if (level != NGX_LOG_DEBUG && log->handler) {
- p = log->handler(log, p, last - p);
- }
- if (p > last - NGX_LINEFEED_SIZE) {
- p = last - NGX_LINEFEED_SIZE;
- }
- ngx_linefeed(p);
- wrote_stderr = 0;
- debug_connection = (log->log_level & NGX_LOG_DEBUG_CONNECTION) != 0;
- while (log) {
- if (log->log_level < level && !debug_connection) {
- break;
- }
- if (log->writer) {
- log->writer(log, level, errstr, p - errstr);
- goto next;
- }
- if (ngx_time() == log->disk_full_time) {
-
- goto next;
- }
- n = ngx_write_fd(log->file->fd, errstr, p - errstr);
- if (n == -1 && ngx_errno == NGX_ENOSPC) {
- log->disk_full_time = ngx_time();
- }
- if (log->file->fd == ngx_stderr) {
- wrote_stderr = 1;
- }
- next:
- log = log->next;
- }
- if (!ngx_use_stderr
- || level > NGX_LOG_WARN
- || wrote_stderr)
- {
- return;
- }
- msg -= (7 + err_levels[level].len + 3);
- (void) ngx_sprintf(msg, "nginx: [%V] ", &err_levels[level]);
- (void) ngx_write_console(ngx_stderr, msg, p - msg);
- }
- #if !(NGX_HAVE_VARIADIC_MACROS)
- void ngx_cdecl
- ngx_log_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
- const char *fmt, ...)
- {
- va_list args;
- if (log->log_level >= level) {
- va_start(args, fmt);
- ngx_log_error_core(level, log, err, fmt, args);
- va_end(args);
- }
- }
- void ngx_cdecl
- ngx_log_debug_core(ngx_log_t *log, ngx_err_t err, const char *fmt, ...)
- {
- va_list args;
- va_start(args, fmt);
- ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, args);
- va_end(args);
- }
- #endif
- void ngx_cdecl
- ngx_log_abort(ngx_err_t err, const char *fmt, ...)
- {
- u_char *p;
- va_list args;
- u_char errstr[NGX_MAX_CONF_ERRSTR];
- va_start(args, fmt);
- p = ngx_vsnprintf(errstr, sizeof(errstr) - 1, fmt, args);
- va_end(args);
- ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, err,
- "%*s", p - errstr, errstr);
- }
- void ngx_cdecl
- ngx_log_stderr(ngx_err_t err, const char *fmt, ...)
- {
- u_char *p, *last;
- va_list args;
- u_char errstr[NGX_MAX_ERROR_STR];
- last = errstr + NGX_MAX_ERROR_STR;
- p = errstr + 7;
- ngx_memcpy(errstr, "nginx: ", 7);
- va_start(args, fmt);
- p = ngx_vslprintf(p, last, fmt, args);
- va_end(args);
- if (err) {
- p = ngx_log_errno(p, last, err);
- }
- if (p > last - NGX_LINEFEED_SIZE) {
- p = last - NGX_LINEFEED_SIZE;
- }
- ngx_linefeed(p);
- (void) ngx_write_console(ngx_stderr, errstr, p - errstr);
- }
- u_char *
- ngx_log_errno(u_char *buf, u_char *last, ngx_err_t err)
- {
- if (buf > last - 50) {
-
- buf = last - 50;
- *buf++ = '.';
- *buf++ = '.';
- *buf++ = '.';
- }
- #if (NGX_WIN32)
- buf = ngx_slprintf(buf, last, ((unsigned) err < 0x80000000)
- ? " (%d: " : " (%Xd: ", err);
- #else
- buf = ngx_slprintf(buf, last, " (%d: ", err);
- #endif
- buf = ngx_strerror(err, buf, last - buf);
- if (buf < last) {
- *buf++ = ')';
- }
- return buf;
- }
- ngx_log_t *
- ngx_log_init(u_char *prefix)
- {
- u_char *p, *name;
- size_t nlen, plen;
- ngx_log.file = &ngx_log_file;
- ngx_log.log_level = NGX_LOG_NOTICE;
- name = (u_char *) NGX_ERROR_LOG_PATH;
-
- nlen = ngx_strlen(name);
- if (nlen == 0) {
- ngx_log_file.fd = ngx_stderr;
- return &ngx_log;
- }
- p = NULL;
- #if (NGX_WIN32)
- if (name[1] != ':') {
- #else
- if (name[0] != '/') {
- #endif
- if (prefix) {
- plen = ngx_strlen(prefix);
- } else {
- #ifdef NGX_PREFIX
- prefix = (u_char *) NGX_PREFIX;
- plen = ngx_strlen(prefix);
- #else
- plen = 0;
- #endif
- }
- if (plen) {
- name = malloc(plen + nlen + 2);
- if (name == NULL) {
- return NULL;
- }
- p = ngx_cpymem(name, prefix, plen);
- if (!ngx_path_separator(*(p - 1))) {
- *p++ = '/';
- }
- ngx_cpystrn(p, (u_char *) NGX_ERROR_LOG_PATH, nlen + 1);
- p = name;
- }
- }
- ngx_log_file.fd = ngx_open_file(name, NGX_FILE_APPEND,
- NGX_FILE_CREATE_OR_OPEN,
- NGX_FILE_DEFAULT_ACCESS);
- if (ngx_log_file.fd == NGX_INVALID_FILE) {
- ngx_log_stderr(ngx_errno,
- "[alert] could not open error log file: "
- ngx_open_file_n " \"%s\" failed", name);
- #if (NGX_WIN32)
- ngx_event_log(ngx_errno,
- "could not open error log file: "
- ngx_open_file_n " \"%s\" failed", name);
- #endif
- ngx_log_file.fd = ngx_stderr;
- }
- if (p) {
- ngx_free(p);
- }
- return &ngx_log;
- }
- ngx_int_t
- ngx_log_open_default(ngx_cycle_t *cycle)
- {
- ngx_log_t *log;
- static ngx_str_t error_log = ngx_string(NGX_ERROR_LOG_PATH);
- if (ngx_log_get_file_log(&cycle->new_log) != NULL) {
- return NGX_OK;
- }
- if (cycle->new_log.log_level != 0) {
-
- log = ngx_pcalloc(cycle->pool, sizeof(ngx_log_t));
- if (log == NULL) {
- return NGX_ERROR;
- }
- } else {
-
- log = &cycle->new_log;
- }
- log->log_level = NGX_LOG_ERR;
- log->file = ngx_conf_open_file(cycle, &error_log);
- if (log->file == NULL) {
- return NGX_ERROR;
- }
- if (log != &cycle->new_log) {
- ngx_log_insert(&cycle->new_log, log);
- }
- return NGX_OK;
- }
- ngx_int_t
- ngx_log_redirect_stderr(ngx_cycle_t *cycle)
- {
- ngx_fd_t fd;
- if (cycle->log_use_stderr) {
- return NGX_OK;
- }
-
- fd = ngx_log_get_file_log(cycle->log)->file->fd;
- if (fd != ngx_stderr) {
- if (ngx_set_stderr(fd) == NGX_FILE_ERROR) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
- ngx_set_stderr_n " failed");
- return NGX_ERROR;
- }
- }
- return NGX_OK;
- }
- ngx_log_t *
- ngx_log_get_file_log(ngx_log_t *head)
- {
- ngx_log_t *log;
- for (log = head; log; log = log->next) {
- if (log->file != NULL) {
- return log;
- }
- }
- return NULL;
- }
- static char *
- ngx_log_set_levels(ngx_conf_t *cf, ngx_log_t *log)
- {
- ngx_uint_t i, n, d, found;
- ngx_str_t *value;
- if (cf->args->nelts == 2) {
- log->log_level = NGX_LOG_ERR;
- return NGX_CONF_OK;
- }
- value = cf->args->elts;
- for (i = 2; i < cf->args->nelts; i++) {
- found = 0;
- for (n = 1; n <= NGX_LOG_DEBUG; n++) {
- if (ngx_strcmp(value[i].data, err_levels[n].data) == 0) {
- if (log->log_level != 0) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "duplicate log level \"%V\"",
- &value[i]);
- return NGX_CONF_ERROR;
- }
- log->log_level = n;
- found = 1;
- break;
- }
- }
- for (n = 0, d = NGX_LOG_DEBUG_FIRST; d <= NGX_LOG_DEBUG_LAST; d <<= 1) {
- if (ngx_strcmp(value[i].data, debug_levels[n++]) == 0) {
- if (log->log_level & ~NGX_LOG_DEBUG_ALL) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid log level \"%V\"",
- &value[i]);
- return NGX_CONF_ERROR;
- }
- log->log_level |= d;
- found = 1;
- break;
- }
- }
- if (!found) {
- ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
- "invalid log level \"%V\"", &value[i]);
- return NGX_CONF_ERROR;
- }
- }
- if (log->log_level == NGX_LOG_DEBUG) {
- log->log_level = NGX_LOG_DEBUG_ALL;
- }
- return NGX_CONF_OK;
- }
- static char *
- ngx_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
- {
- ngx_log_t *dummy;
- dummy = &cf->cycle->new_log;
- return ngx_log_set_log(cf, &dummy);
- }
- char *
- ngx_log_set_log(ngx_conf_t *cf, ngx_log_t **head)
- {
- ngx_log_t *new_log;
- ngx_str_t *value, name;
- ngx_syslog_peer_t *peer;
- if (*head != NULL && (*head)->log_level == 0) {
- new_log = *head;
- } else {
- new_log = ngx_pcalloc(cf->pool, sizeof(ngx_log_t));
- if (new_log == NULL) {
- return NGX_CONF_ERROR;
- }
- if (*head == NULL) {
- *head = new_log;
- }
- }
- value = cf->args->elts;
- if (ngx_strcmp(value[1].data, "stderr") == 0) {
- ngx_str_null(&name);
- cf->cycle->log_use_stderr = 1;
- new_log->file = ngx_conf_open_file(cf->cycle, &name);
- if (new_log->file == NULL) {
- return NGX_CONF_ERROR;
- }
- } else if (ngx_strncmp(value[1].data, "syslog:", 7) == 0) {
- peer = ngx_pcalloc(cf->pool, sizeof(ngx_syslog_peer_t));
- if (peer == NULL) {
- return NGX_CONF_ERROR;
- }
- if (ngx_syslog_process_conf(cf, peer) != NGX_CONF_OK) {
- return NGX_CONF_ERROR;
- }
- new_log->writer = ngx_syslog_writer;
- new_log->wdata = peer;
- } else {
- new_log->file = ngx_conf_open_file(cf->cycle, &value[1]);
- if (new_log->file == NULL) {
- return NGX_CONF_ERROR;
- }
- }
- if (ngx_log_set_levels(cf, new_log) != NGX_CONF_OK) {
- return NGX_CONF_ERROR;
- }
- if (*head != new_log) {
- ngx_log_insert(*head, new_log);
- }
- return NGX_CONF_OK;
- }
- static void
- ngx_log_insert(ngx_log_t *log, ngx_log_t *new_log)
- {
- ngx_log_t tmp;
- if (new_log->log_level > log->log_level) {
-
- tmp = *log;
- *log = *new_log;
- *new_log = tmp;
- log->next = new_log;
- return;
- }
- while (log->next) {
- if (new_log->log_level > log->next->log_level) {
- new_log->next = log->next;
- log->next = new_log;
- return;
- }
- log = log->next;
- }
- log->next = new_log;
- }
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