source: mainline/uspace/lib/c/generic/io/logctl.c@ 04da852

/*
 * Copyright (c) 2012 Vojtech Horky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libc
 * @{
 */

#include <assert.h>
#include <unistd.h>
#include <errno.h>
#include <io/logctl.h>
#include <ipc/logger.h>
#include <sysinfo.h>
#include <ns.h>
#include <str.h>

#define SYSINFO_LOGGGER_BOOT_ARGUMENT "init_args.logger"

/** IPC session with the logger service. */
static async_sess_t *logger_session = NULL;

static int connect_to_logger()
{
        if (logger_session != NULL)
                return EOK;

        logger_session = service_connect_blocking(EXCHANGE_SERIALIZE,
            SERVICE_LOGGER, LOGGER_INTERFACE_CONTROL, 0);
        if (logger_session == NULL)
                return ENOMEM;

        return EOK;
}


int logctl_set_default_level(log_level_t new_level)
{
        int rc = connect_to_logger();
        if (rc != EOK)
                return rc;

        async_exch_t *exchange = async_exchange_begin(logger_session);
        if (exchange == NULL)
                return ENOMEM;

        rc = (int) async_req_1_0(exchange,
            LOGGER_CTL_SET_DEFAULT_LEVEL, new_level);

        async_exchange_end(exchange);

        return rc;
}

int logctl_get_boot_level(log_level_t *level)
{
        size_t argument_size;
        void *argument = sysinfo_get_data(SYSINFO_LOGGGER_BOOT_ARGUMENT, &argument_size);
        if (argument == NULL)
                return EINVAL;

        char level_str[10];
        str_cpy(level_str, 10, (const char *) argument);

        int level_int = strtol(level_str, NULL, 0);

        log_level_t boot_level = (log_level_t) level_int;
        if (boot_level >= LVL_LIMIT)
                return EINVAL;

        if (level != NULL)
                *level = (log_level_t) boot_level;

        return EOK;
}

/** @}
 */