/* Copyright (C) 2019 MariaDB Corporation

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */


#include "StatTask.h"
#include "messageFormat.h"
#include "SMLogging.h"
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
#include <string.h>

using namespace std;

namespace storagemanager
{

StatTask::StatTask(int sock, uint len) : PosixTask(sock, len)
{
}

StatTask::~StatTask()
{
}

#define check_error(msg, ret) \
    if (success<0) \
    { \
        handleError(msg, errno); \
        return ret; \
    }

bool StatTask::run()
{
    SMLogging* logger = SMLogging::get();
    int success;
    uint8_t buf[1024] = {0};
    
    if (getLength() > 1023) {
        handleError("StatTask read", ENAMETOOLONG);
        return true;
    }
    
    success = read(buf, getLength());
    check_error("StatTask read", false);
    stat_cmd *cmd = (stat_cmd *) buf;
    sm_response *resp = (sm_response *) buf;
    
    #ifdef SM_TRACE
    logger->log(LOG_DEBUG,"stat %s.",cmd->filename);
    #endif
    int err;
    try
    {
        err = ioc->stat(cmd->filename, (struct stat *) resp->payload);
    }
    catch (exception &e)
    {
        logger->log(LOG_ERR, "StatTask: caught '%s'", e.what());
        errno = EIO;
        err = -1;
    }

    resp->returnCode = err;
    uint payloadLen;
    if (!err)
        payloadLen = sizeof(struct stat);
    else {
        payloadLen = 4;
        *((int32_t *) resp->payload) = errno;
    }
    return write(*resp, payloadLen);
}

}