bin/named/log.c

	log.c revision dafcb997e390efa4423883dafd100c975c4095d6
/*
 * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1999-2002  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: log.c,v 1.37 2004/03/05 04:57:47 marka Exp $ */

#include <config.h>

#include <isc/result.h>

#include <isccfg/log.h>

#include <named/log.h>

#ifndef ISC_FACILITY
#define ISC_FACILITY LOG_DAEMON
#endif

/*
 * When adding a new category, be sure to add the appropriate
 * #define to <named/log.h>.
 */
static isc_logcategory_t categories[] = {
    { "",               0 },
    { "client",         0 },
    { "network",            0 },
    { "update",         0 },
    { "queries",            0 },
    { "unmatched",          0 },
    { "update-security",        0 },
    { NULL,             0 }
};

/*
 * When adding a new module, be sure to add the appropriate
 * #define to <dns/log.h>.
 */
static isc_logmodule_t modules[] = {
    { "main",           0 },
    { "client",         0 },
    { "server",         0 },
    { "query",          0 },
    { "interfacemgr",       0 },
    { "update",         0 },
    { "xfer-in",            0 },
    { "xfer-out",           0 },
    { "notify",         0 },
    { "control",            0 },
    { "lwresd",         0 },
    { NULL,             0 }
};

isc_result_t
ns_log_init(isc_boolean_t safe) {
    isc_result_t result;
    isc_logconfig_t *lcfg = NULL;

    ns_g_categories = categories;
    ns_g_modules = modules;

    /*
     * Setup a logging context.
     */
    result = isc_log_create(ns_g_mctx, &ns_g_lctx, &lcfg);
    if (result != ISC_R_SUCCESS)
        return (result);

    isc_log_registercategories(ns_g_lctx, ns_g_categories);
    isc_log_registermodules(ns_g_lctx, ns_g_modules);
    isc_log_setcontext(ns_g_lctx);
    dns_log_init(ns_g_lctx);
    dns_log_setcontext(ns_g_lctx);
    cfg_log_init(ns_g_lctx);

    if (safe)
        result = ns_log_setsafechannels(lcfg);
    else
        result = ns_log_setdefaultchannels(lcfg);
    if (result != ISC_R_SUCCESS)
        goto cleanup;

    result = ns_log_setdefaultcategory(lcfg);
    if (result != ISC_R_SUCCESS)
        goto cleanup;

    return (ISC_R_SUCCESS);

 cleanup:
    isc_log_destroy(&ns_g_lctx);
    isc_log_setcontext(NULL);
    dns_log_setcontext(NULL);

    return (result);
}

isc_result_t
ns_log_setdefaultchannels(isc_logconfig_t *lcfg) {
    isc_result_t result;
    isc_logdestination_t destination;

    /*
     * By default, the logging library makes "default_debug" log to
     * stderr.  In BIND, we want to override this and log to named.run
     * instead, unless the the -g option was given.
     */
    if (! ns_g_logstderr) {
        destination.file.stream = NULL;
        destination.file.name = "named.run";
        destination.file.versions = ISC_LOG_ROLLNEVER;
        destination.file.maximum_size = 0;
        result = isc_log_createchannel(lcfg, "default_debug",
                           ISC_LOG_TOFILE,
                           ISC_LOG_DYNAMIC,
                           &destination,
                           ISC_LOG_PRINTTIME|
                           ISC_LOG_DEBUGONLY);
        if (result != ISC_R_SUCCESS)
            goto cleanup;
    }

#if ISC_FACILITY != LOG_DAEMON
    destination.facility = ISC_FACILITY;
    result = isc_log_createchannel(lcfg, "default_syslog",
                       ISC_LOG_TOSYSLOG, ISC_LOG_INFO,
                       &destination, 0);
    if (result != ISC_R_SUCCESS)
        goto cleanup;
#endif

    /*
     * Set the initial debug level.
     */
    isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);

    result = ISC_R_SUCCESS;

 cleanup:
    return (result);
}

isc_result_t
ns_log_setsafechannels(isc_logconfig_t *lcfg) {
    isc_result_t result;

    if (! ns_g_logstderr) {
        result = isc_log_createchannel(lcfg, "default_debug",
                           ISC_LOG_TONULL,
                           ISC_LOG_DYNAMIC,
                           NULL, 0);
        if (result != ISC_R_SUCCESS)
            goto cleanup;

        /*
         * Setting the debug level to zero should get the output
         * discarded a bit faster.
         */
        isc_log_setdebuglevel(ns_g_lctx, 0);
    } else {
        isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
    }

    result = ISC_R_SUCCESS;

 cleanup:
    return (result);
}

isc_result_t
ns_log_setdefaultcategory(isc_logconfig_t *lcfg) {
    isc_result_t result;

    if (! ns_g_logstderr) {
        result = isc_log_usechannel(lcfg, "default_syslog",
                        ISC_LOGCATEGORY_DEFAULT, NULL);
        if (result != ISC_R_SUCCESS)
            goto cleanup;
    }

    result = isc_log_usechannel(lcfg, "default_debug",
                    ISC_LOGCATEGORY_DEFAULT, NULL);
    if (result != ISC_R_SUCCESS)
        goto cleanup;

    result = ISC_R_SUCCESS;

 cleanup:
    return (result);
}

isc_result_t
ns_log_setunmatchedcategory(isc_logconfig_t *lcfg) {
    isc_result_t result;

    result = isc_log_usechannel(lcfg, "null",
                    NS_LOGCATEGORY_UNMATCHED, NULL);
    return (result);
}

void
ns_log_shutdown(void) {
    isc_log_destroy(&ns_g_lctx);
    isc_log_setcontext(NULL);
    dns_log_setcontext(NULL);
}