view src/core/ngx_log.c @ 4373:f41b79fa95a3

Scgi: removed error if there is no Status header. The SCGI specification doesn't specify format of the response, and assuming CGI specs should be used there is no reason to complain. RFC 3875 explicitly states that "A Status header field is optional, and status 200 'OK' is assumed if it is omitted".
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 19 Dec 2011 11:25:40 +0000
parents bf452af6c1d2
children d620f497c50f
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 */


#include <ngx_config.h>
#include <ngx_core.h>


static char *ngx_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);


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,                /* module context */
    ngx_errlog_commands,                   /* module directives */
    NGX_CORE_MODULE,                       /* module type */
    NULL,                                  /* init master */
    NULL,                                  /* init module */
    NULL,                                  /* init process */
    NULL,                                  /* init thread */
    NULL,                                  /* exit thread */
    NULL,                                  /* exit process */
    NULL,                                  /* exit master */
    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;
    u_char   errstr[NGX_MAX_ERROR_STR];

    if (log->file->fd == NGX_INVALID_FILE) {
        return;
    }

    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]);

    /* pid#tid */
    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);

    (void) ngx_write_fd(log->file->fd, errstr, p - errstr);

    if (!ngx_use_stderr
        || level > NGX_LOG_WARN
        || log->file->fd == ngx_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) {

        /* leave a space for an error code */

        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;

    /*
     * we use ngx_strlen() here since BCC warns about
     * condition is always false and unreachable code
     */

    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_log_t *
ngx_log_create(ngx_cycle_t *cycle, ngx_str_t *name)
{
    ngx_log_t  *log;

    log = ngx_pcalloc(cycle->pool, sizeof(ngx_log_t));
    if (log == NULL) {
        return NULL;
    }

    log->file = ngx_conf_open_file(cycle, name);
    if (log->file == NULL) {
        return NULL;
    }

    return log;
}


char *
ngx_log_set_levels(ngx_conf_t *cf, ngx_log_t *log)
{
    ngx_uint_t   i, n, d, found;
    ngx_str_t   *value;

    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_str_t  *value, name;

    if (cf->cycle->new_log.file) {
        return "is duplicate";
    }

    value = cf->args->elts;

    if (ngx_strcmp(value[1].data, "stderr") == 0) {
        ngx_str_null(&name);

    } else {
        name = value[1];
    }

    cf->cycle->new_log.file = ngx_conf_open_file(cf->cycle, &name);
    if (cf->cycle->new_log.file == NULL) {
        return NULL;
    }

    if (cf->args->nelts == 2) {
        cf->cycle->new_log.log_level = NGX_LOG_ERR;
        return NGX_CONF_OK;
    }

    cf->cycle->new_log.log_level = 0;

    return ngx_log_set_levels(cf, &cf->cycle->new_log);
}