석수코딩교육

/*

WINDOWS,CLIENT,THREAD(FILE READ SEND),BASIC(RECV)

*/

#include <WinSock2.h>
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define  MAXLINE 1024

DWORD WINAPI stdin_input_send_thread(LPVOID arg);

FILE *fp=NULL;
char line[MAXLINE], chatdata[MAXLINE+1];

struct sockaddr_in server_addr;
SOCKET clientsocket; //server connect socket
char *escape = "quit"; //exit command message
BOOL bisquit;           //exit falg variable

int main(int argc, char *argv[])
{
    WSADATA wsa;    //socket
    HANDLE hthread; //thread
    DWORD threadid;
    int size;

    if (argc != 4)
    {
        printf("usage : %s server_address port filename\n", argv[0]);
        return(-1);
    }
    bisquit = FALSE;

    //socket initialization
    if (WSAStartup(MAKEWORD(2,2), &wsa) != 0)
    {
        return(-2);
    }
    //socket creation
    if ((clientsocket = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
        printf("fail make socket\n");
        return(-3);
    }

    //memory initialization
    memset(&server_addr, 0x00, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr(argv[1]);
    server_addr.sin_port = htons(atoi(argv[2]));

    //connection with server
    if (connect(clientsocket, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
    {
        printf("fail connect to server\n");
        return(-4);
    }

    if((fp = fopen(argv[3], "rt"))==NULL)
    {
        printf("fopen error(%s)\n", argv[3]);
        return(-5);
    }

    hthread = CreateThread(NULL, 0, stdin_input_send_thread, 0, 0, &threadid);
    if (hthread == NULL)
    {
        printf("fail make thread\n");
    }
    else
    {
        CloseHandle(hthread);
    }

    while (!bisquit)
    {
        memset(chatdata, 0x00, sizeof(chatdata));

        if ((size = recv(clientsocket, chatdata, MAXLINE, 0)) == INVALID_SOCKET)
        {
            break;
        }
        else
        {
            chatdata[size] = '\0';
            printf("(RECV)%s", chatdata);
        }
    }
    closesocket(clientsocket);
    WSACleanup();

    if(fp != NULL) fclose(fp);

    return(0);
}

//user data input mechanism
DWORD WINAPI stdin_input_send_thread(LPVOID arg)
{
    char rbuf[4096];

    while(TRUE)
    {
        memset(rbuf, 0x00, sizeof(rbuf));
        if(fgets(rbuf, sizeof(rbuf), fp) == NULL) break;

        printf("(SEND)%s", rbuf);

        if (send(clientsocket, rbuf, strlen(rbuf), 0) < 0)
        {
            return(-2);
        }

        Sleep(500); //#include
    }
    return 0;
}

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/*-------------------

* static 키워드를 사용한 변수는 클래스가 메모리에 올라갈 때 자동으로 생성이 됩니다.
인스턴스 생성 없이 바로 사용이 가능한 것이죠.
이런 특성 때문에 프로그램 내에서 공통으로 사용되는 데이터들을 관리할 때 이용합니다.
자바 프로그램에서는 공통 로직이 들어가는 유틸 기능을 static 으로 작성하곤 합니다.
이런 static 은 남발해서는 안되며 공통으로 값을 유지하고 싶을 때만 사용합니다.

*/

public class StaticSample02 {
public static void main(String args[]) {

        Card c1 = new Card();
        c1.kind = "Heart";
        c1.number = 7;

System.out.println("==> 인스턴스 함수 호출");
System.out.println("totalWidth() : " + c1.totalWidth());

        System.out.println("==> static 함수 호출 ");
        System.out.println("totalWidth() : " + Card.totalWidth(10, 20));
    }
}

class Card {

    String kind;      // 카드 종류
    int number;       // 카드 숫자
    int width = 10;   // 카드 넓이
    int height = 25; // 카드 높이

    public int getNumber() {
        return number;
    }
    public int totalWidth() {
        return width * height;
    }
    public static int totalWidth(int width, int height) {
        return width * height;
    }
}

/*--------결과
==> 인스턴스 함수 호출
totalWidth() : 250
==> static 함수 호출
totalWidth() : 200

--------------------------------------*/

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import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

public class AES128 {

public static String key = "AAAAAAAAAAAAAAAA";

     public static void main(String[] args) {
         String message = "ABCDEFGHIJKLMNOPQRSTUABCDEFGHIJKLMNOPQRSTUABCDEFGHIJKLMNOPQRSTU";

         AES128 aes128 = new AES128();

         try
         {
            String encrypt = aes128.encrypt(message);
            System.out.println("[ORIGIN STR ]= " + message);
            System.out.println("[ENCRYPT STR ]= " + encrypt);

            String decrypt = aes128.decrypt(encrypt);
            System.out.println("[DECRYPT STR ]= " + decrypt);
         }
         catch (Exception e)
         {
            e.printStackTrace();
         }
     }
     public byte[] hexToByteArray(String hex) {
        if (hex == null || hex.length() == 0) {
            return null;
        }

        byte[] ba = new byte[hex.length() / 2];

        for (int i = 0; i < ba.length; i++) {
            ba[i] = (byte) Integer.parseInt(hex.substring(2 * i, 2 * i + 2), 16);
        }

        return ba;
     }
     public String byteArrayToHex(byte[] ba) {
        if (ba == null || ba.length == 0) {
            return null;
        }

        StringBuffer sb = new StringBuffer(ba.length * 2);
        String hexNumber;

        for (int x = 0; x < ba.length; x++) {
            hexNumber = "0" + Integer.toHexString(0xff & ba[x]);
            sb.append(hexNumber.substring(hexNumber.length() - 2));
        }

        return sb.toString();
     }
     public String encrypt(String message) throws Exception {

        AES128 aes128 = new AES128();

        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), "AES");

Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

        byte[] encrypted = cipher.doFinal(message.getBytes());

        return aes128.byteArrayToHex(encrypted);
     }
     public String decrypt(String encrypted) throws Exception {

        AES128 aes128 = new AES128();

        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes(), "AES");

        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);

        byte[] original = cipher.doFinal(aes128.hexToByteArray(encrypted));

        String originalString = new String(original);

        return originalString;
    }
}

/*결과

[ORIGIN STR ]= ABCDEFGHIJKLMNOPQRSTUABCDEFGHIJKLMNOPQRSTUABCDEFGHIJKLMNOPQRSTU
[ENCRYPT STR ]= 1eb6a5b8559de7cf7936ad108fb1bd2cd323454cfb4097b6bc53e670a51e9067
deaeebd8095ae5a76ebf9797c551bc0ab0ebca77dc7be9dd95452b34e90f845c
[DECRYPT STR ]= ABCDEFGHIJKLMNOPQRSTUABCDEFGHIJKLMNOPQRSTUABCDEFGHIJKLMNOPQRSTU

*/

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/*

카카오 신입공채 1차 코딩테스트 문제1 비밀지도

문제설명

네오는 평소 프로도가 비상금을 숨겨놓는 장소를 알려줄 비밀지도를 손에 넣었다. 그런데 이 비밀지도는 숫자로 암호화되어 있어 위치를 확인하기 위해서는 암호를 해독해야 한다. 다행히 지도 암호를 해독할 방법을 적어놓은 메모도 함께 발견했다.

지도는 한 변의 길이가 n인 정사각형 배열 형태로, 각 칸은 “공백”(“ “) 또는 “벽”(“#”) 두 종류로 이루어져 있다.

전체 지도는 두 장의 지도를 겹쳐서 얻을 수 있다. 각각 “지도 1”과 “지도 2”라고 하자. 지도 1 또는 지도 2 중 어느 하나라도 벽인 부분은 전체 지도에서도 벽이다. 지도 1과 지도 2에서 모두 공백인 부분은 전체 지도에서도 공백이다.

“지도 1”과 “지도 2”는 각각 정수 배열로 암호화되어 있다.

암호화된 배열은 지도의 각 가로줄에서 벽 부분을 1, 공백 부분을 0으로 부호화했을 때 얻어지는 이진수에 해당하는 값의 배열이다.

이해이미지)

네오가 프로도의 비상금을 손에 넣을 수 있도록, 비밀지도의 암호를 해독하는 작업을 도와줄 프로그램을 작성하라.

입력형식

입력으로 지도의 한 변 크기 n 과 2개의 정수 배열 arr1, arr2가 들어온다.

arr1, arr2는 길이 n인 정수 배열로 주어진다.

정수 배열의 각 원소 x를 이진수로 변환했을 때의 길이는 n 이하이다. 즉, 0 ? x ? 2^n - 1을 만족한다.

출력형식

원래의 비밀지도를 해독하여 "#", 공백으로 구성된 문자열 배열로 출력하라.

문제해설

이 문제는 비트 연산Bitwise Operation을 묻는 문제입니다. 이미 문제 예시에 2진수로 처리하는 힌트가 포함되어 있고, 둘 중 하나가 1일 경우에 벽 #이 생기기 때문에 OR로 처리하면 간단히 풀 수 있습니다. 아주 쉬운 문제였던 만큼 if else로 풀이한 분들도 많이 발견되었는데요. 정답으로는 간주되지만 이 문제는 비트 연산을 잘 다룰 수 있는지를 묻고자 하는 의도였던 만큼 앞으로 이런 유형의 문제를 풀 때는 비트 연산을 꼭 기억하시기 바랍니다.

이 문제의 정답률은 81.78%입니다. 첫 번째 문제이고 가장 쉬운 문제였던 만큼 많은 분들이 잘 풀어주셨습니다.

*/

public class SecretMap {

public static void main(String[] args) {

int[] arr1;

int[] arr2;

arr1 = new int[]{9, 20, 28, 18, 11};

arr2 = new int[]{30, 1, 21, 17, 28};

printArr(decodeSecretMap(5, arr1, arr2));

arr1 = new int[]{46, 33, 33 ,22, 31, 50};

arr2 = new int[]{27 ,56, 19, 14, 14, 10};

printArr(decodeSecretMap(6, arr1, arr2));

}

/**

* 입력받은 arr1, arr2의 각 int를 or연산 처리

* -> toBinaryString으로 변환 -> 출력형태에 맞게 문자열 replace

* @param n

* @param arr1

* @param arr2

* @return

*/

public static String[] decodeSecretMap(int n, int[] arr1, int[] arr2) {

String[] retArr = new String[n];

for(int i = 0; i < n; i++) {

retArr[i] = Integer.toBinaryString(arr1[i]|arr2[i]).replace("0", " ").replace("1", "#").replace("2", "$").replace("3", "%");

}

return retArr;

}

/**

* 배열을 입력받아 println

* @param arr

*/

public static void printArr(String[] arr) {

StringBuilder sb = new StringBuilder();

for(String str: arr) {

sb.append(", \""+str+"\"");

}

System.out.println(sb.toString().replaceFirst(", ", ""));

}

/*결과

bash-3.1$

bash-3.1$ java SecretMap

"#####", "# # #", "### #", "# ##", "#####"

"######", "### #", "## ##", "#### ", "#####", "### # "

bash-3.1$

*/

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//IPC QUEUE 데이타를 읽어 KAFKA에 전송하는경우

//FILE의 데이타를 읽어서 KAFKA에 전송하는경우(아래소스는 여기에 해당)

/*

* librdkafka - Apache Kafka C library

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions are met:

*

* 1. Redistributions of source code must retain the above copyright notice,

* this list of conditions and the following disclaimer.

* 2. 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.

*

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.

*/

/**

* Simple Apache Kafka producer

* using the Kafka driver from librdkafka

* (https://github.com/edenhill/librdkafka)

*/

#include <stdio.h>

#include <signal.h>

#include <string.h>

/* Typical include path would be <librdkafka/rdkafka.h>, but this program

* is builtin from within the librdkafka source tree and thus differs. */

#include "rdkafka.h"

static int run = 1;

/**

* @brief Signal termination of program

*/

static void stop (int sig) {

run = 0;

fclose(stdin); /* abort fgets() */

}

/**

* @brief Message delivery report callback.

*

* This callback is called exactly once per message, indicating if

* the message was succesfully delivered

* (rkmessage->err == RD_KAFKA_RESP_ERR_NO_ERROR) or permanently

* failed delivery (rkmessage->err != RD_KAFKA_RESP_ERR_NO_ERROR).

*

* The callback is triggered from rd_kafka_poll() and executes on

* the application's thread.

*/

static void dr_msg_cb (rd_kafka_t *rk, const rd_kafka_message_t *rkmessage, void *opaque) {

if (rkmessage->err)

fprintf(stderr, "%% Message delivery failed: %s\n",

rd_kafka_err2str(rkmessage->err));

else

fprintf(stderr,"%% Message delivered (%zd bytes, ""partition %"PRId32")\n",rkmessage->len, rkmessage->partition);

/* The rkmessage is destroyed automatically by librdkafka */

}

int main (int argc, char **argv) {

rd_kafka_t *rk; /* Producer instance handle */

rd_kafka_topic_t *rkt; /* Topic object */

rd_kafka_conf_t *conf; /* Temporary configuration object */

char errstr[512]; /* librdkafka API error reporting buffer */

char buf[512]; /* Message value temporary buffer */

const char *brokers; /* Argument: broker list */

const char *topic; /* Argument: topic to produce to */

FILE *fp=NULL;

/*

* Argument validation

*/

if (argc != 4) {

fprintf(stderr, "%% Usage: %s <broker> <topic> <filename>\n", argv[0]);

return -1;

}

brokers = argv[1]; //127.0.0.1:9092

//1.1 기본적인 topic 생성예제(topic의 이름은 test)

//>bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test

//1.2 일자별로 topic생성(아래예제는 20180401 ~ 20180431, 4월 날짜별로 topic생성)

//>for ii in `seq 20180401 20180431`; do bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic $ii; done

//3. Step 3: Create a topic

//3.1 Let's create a topic named "test" with a single partition and only one replica:

// for ii in `seq 20180411 20180431`; do bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic $ii; done

//> cd /home1/irteamsu/kafka2/kafka_2.11-1.1.0

//> bin/kafka-server-start.sh config/server.properties

//3.2 TOPIC리스트 확인

//> bin/kafka-topics.sh --list --zookeeper localhost:2181

topic = argv[2]; //YYYYMMDD

if((fp=fopen(argv[3], "rt"))==NULL) return(-1);

/*

* Create Kafka client configuration place-holder

*/

conf = rd_kafka_conf_new();

/* Set bootstrap broker(s) as a comma-separated list of

* host or host:port (default port 9092).

* librdkafka will use the bootstrap brokers to acquire the full

* set of brokers from the cluster. */

if (rd_kafka_conf_set(conf, "bootstrap.servers", brokers,errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK)

{

fprintf(stderr, "%s\n", errstr);

return -1;

}

/* Set the delivery report callback.

* This callback will be called once per message to inform

* the application if delivery succeeded or failed.

* See dr_msg_cb() above. */

rd_kafka_conf_set_dr_msg_cb(conf, dr_msg_cb);

/*

* Create producer instance.

*

* NOTE: rd_kafka_new() takes ownership of the conf object

* and the application must not reference it again after

* this call.

*/

rk = rd_kafka_new(RD_KAFKA_PRODUCER, conf, errstr, sizeof(errstr));

if (!rk) {

fprintf(stderr,

"%% Failed to create new producer: %s\n", errstr);

return -1;

}

/* Create topic object that will be reused for each message

* produced.

*

* Both the producer instance (rd_kafka_t) and topic objects (topic_t)

* are long-lived objects that should be reused as much as possible.

*/

rkt = rd_kafka_topic_new(rk, topic, NULL);

if (!rkt) {

fprintf(stderr, "%% Failed to create topic object: %s\n",

rd_kafka_err2str(rd_kafka_last_error()));

rd_kafka_destroy(rk);

return -1;

}

/* Signal handler for clean shutdown */

signal(SIGINT, stop);

fprintf(stderr,

"%% Type some text and hit enter to produce message\n"

"%% Or just hit enter to only serve delivery reports\n"

"%% Press Ctrl-C or Ctrl-D to exit\n");

while (run)

{

memset(buf, 0x00, sizeof(buf));

if(fgets(buf, sizeof(buf), fp)==NULL) break;

size_t len = strlen(buf);

if (buf[len-1] == '\n') /* Remove newline */

buf[--len] = '\0';

if (len == 0) {

/* Empty line: only serve delivery reports */

rd_kafka_poll(rk, 0/*non-blocking */);

continue;

}

/*

* Send/Produce message.

* This is an asynchronous call, on success it will only

* enqueue the message on the internal producer queue.

* The actual delivery attempts to the broker are handled

* by background threads.

* The previously registered delivery report callback

* (dr_msg_cb) is used to signal back to the application

* when the message has been delivered (or failed).

*/

retry:

if (rd_kafka_produce(

/* Topic object */

rkt,

/* Use builtin partitioner to select partition*/

RD_KAFKA_PARTITION_UA,

/* Make a copy of the payload. */

RD_KAFKA_MSG_F_COPY,

/* Message payload (value) and length */

buf, len,

/* Optional key and its length */

NULL, 0,

/* Message opaque, provided in

* delivery report callback as

* msg_opaque. */

NULL) == -1)

{

/**

* Failed to *enqueue* message for producing.

*/

fprintf(stderr,

"%% Failed to produce to topic %s: %s\n",

rd_kafka_topic_name(rkt),

rd_kafka_err2str(rd_kafka_last_error()));

/* Poll to handle delivery reports */

if (rd_kafka_last_error() ==

RD_KAFKA_RESP_ERR__QUEUE_FULL) {

/* If the internal queue is full, wait for

* messages to be delivered and then retry.

* The internal queue represents both

* messages to be sent and messages that have

* been sent or failed, awaiting their

* delivery report callback to be called.

*

* The internal queue is limited by the

* configuration property

* queue.buffering.max.messages */

rd_kafka_poll(rk, 1000/*block for max 1000ms*/);

goto retry;

}

else

{

fprintf(stderr, "%% Enqueued message (%zd bytes) "

"for topic %s\n",

len, rd_kafka_topic_name(rkt));

}

/* A producer application should continually serve

* the delivery report queue by calling rd_kafka_poll()

* at frequent intervals.

* Either put the poll call in your main loop, or in a

* dedicated thread, or call it after every

* rd_kafka_produce() call.

* Just make sure that rd_kafka_poll() is still called

* during periods where you are not producing any messages

* to make sure previously produced messages have their

* delivery report callback served (and any other callbacks

* you register). */

rd_kafka_poll(rk, 0/*non-blocking*/);

}

/* Wait for final messages to be delivered or fail.

* rd_kafka_flush() is an abstraction over rd_kafka_poll() which

* waits for all messages to be delivered.

*/

fprintf(stderr, "%% Flushing final messages..\n");

rd_kafka_flush(rk, 10*1000 /* wait for max 10 seconds */);

/* Destroy topic object */

rd_kafka_topic_destroy(rkt);

/* Destroy the producer instance */

rd_kafka_destroy(rk);

return 0;

}

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MySQL LOCK 확인 및 해제(kill) 방법

MySQL 사용 시 관리자의 의도 혹은 그렇지 않은 이유들로 인해 Lock 상태가 발생한다.

이럴 경우 어느 쿼리가 Lock을 걸렸는지 확인 후 해당 쿼리를 해제(kill) 해야 할 상황이 있다.

Lock의 종류

Table Lock, User Lock, Global Lock, Name Lock이 있다. 트랜잭션 기반의 멀티 쓰레드를 사용하려면 Lock의 개념을 충분히 알아두어야 한다. 하지만 그렇지 못한 몇몇 프로그래머로 인해 다른 사용자들이 쿼리 대기상태(Lock으로 인한 리소스 접근 대기상태)로 서비스에 지장을 초래할 수 있다.

흔히들 알고있는 Read Lock, Write Lock은 Table, Global Lock 등에 포함된 내용이므로 이를 혼동해서 사용하지 않도록 하자.

이 포스팅은 Lock에 대한 개념을 다루지 않으므로, 보다 자세한 사항은 다른 포스팅을 참조하여 공부하고, Lock이 걸려있는 프로세스의 확인 및 해제를 다뤄보자.

Lock 확인 및 해제

아래 쿼리를 통해 현재 프로세스를 확인할 수 있다.

1. SHOW PROCESSLIST;

cs

(위 쿼리는 100개까지 list를 노출하며, 모두 노출 하려면 SHOW FULL PROCESSLIST;로 하면 된다.)

State컬럼을 보면 Waiting for table metadata lock 으로 인해 해당 쿼리가 진행되지 않음을 확인 할 수 있다.

그러면 이 프로세스를 해제(kill)해보자.

2. KILL 255;

cs

위 쿼리를 통해 lock을 해제할 수 있다.

원인

해당 테이블이 DDL을 통해 open상태일 경우.

선행 트랜잭션이 종료가 되지 않았을 경우 종료를 위한 DDL 구문 실행 대기.

보통 metadata lock info라는 별도의 플로그인을 통해 확인 할 수 있으나 불가능한 경우도 있다.

(트랜잭션 중 autocommit이 false일 때, commit을 수행하지 않고 DDL을 실행할 경우)

마무리

개발 중 문제에 봉착했을 때, 해결법에 대한 포스팅만 보고 해결하지 말고

원인을 분석하고 공부하다보면 내것으로 만들 수 있다는 생각으로 시간을 가지고 투자하면서

배움의 자세를 가지도록 노력하자.

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#QUEUE사용안함
#QUEUE사용안함

#QUEUE사용안함

#SERIAL형식의 입력
#SERIAL형식의 입력
#SERIAL형식의 입력
#SERIAL형식의 입력

mysql> select sum(T2.t_cnt) from DUMMY T1, (select substr(regtime,1,17) as t_regtime, count(1) as t_cnt from RB_OCUS_POS_TEST2 group by substr(regtime,1,17)) T2;
+---------------+
| sum(T2.t_cnt) |
+---------------+
| 161297 |
+---------------+
1 row in set (0.26 sec)

mysql>

1SEC > 647.7791164658635 입력

>>begin[20190829 07:23:04(988)],end[20190829 07:23:23(968)]

1SEC > 8489.315789473684 입력

>>begin[20190829 07:25:41(568)],end[20190829 07:26:05(191)]

1SEC > 6451.88 입력

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//pointer memory use instead of structure stack memory

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#define MAX_ADDRESS_CNT 200

struct st_basic_trade

{

char dataclass[2];

char infoclass[2];

char marketclass[1];

char stockcode[12];

char serialno[8];

char abbrstockcode[9];

char abbrstocknamekor[40];

char abbrstocknameeng[40];

char senddate[8];

char infodivisiongroupno[5];

char stockgroupid[2];

char isunittrade[1];

char exclasscode[2];

char facevaluechangeclasscode[2];

char isopenpricebasedstandardprice[1];

char isrevaluationstockreason[2];

char isstandardpricechangestock[1];

char israndomendpossibillty[1];

char ismarketalarmdangernotice[1];

char marketalarmclasscode[2];

char iscorporategovernancefine[1];

char ismanagementstock[1];

char isinsinceritypublicnewsappoint[1];

char isbackdoorlisting[1];

char istradestop[1];

char indexbusinesstypelarge[3];

char indexbusinesstypemedium[3];

char indexbusinesstypesmall[3];

char standardindustrycode[10];

char businesstypekospi200[1];

char listpricesizecode[1];

char ismanufactureindustry[1];

char iskrx100stock[1];

char isdividendindexstock[1];

char iscorporategovernanceindexstock[1];

char investorganclasscode[2];

char iskospi[1];

char iskospi100[1];

char iskospi50[1];

char iskrxsectorindexcar[1];

char iskrxsectorindexsemiconductor[1];

char iskrxsectorindexbio[1];

char iskrxsectorindexfinance[1];

char iskrxsectorindexit[1];

char iskrxsectorindexenergychemical[1];

char iskrxsectorindexsteel[1];

char iskrxsectorindexnecessary[1];

char iskrxsectorindexmediacomm[1];

char iskrxsectorindexconstruction[1];

char iskrxsectorindexfinanceservice[1];

char iskrxsectorindexstock[1];

char iskrxsectorindexship[1];

char standardprice[9];

char ydayclosepriceclasscode[1];

char ydaycloseprice[9];

char ydayaccmvolume[12];

char ydayaccmamount[18];

char uplimitprice[9];

char downlimitprice[9];

char substituteprice[9];

char facevalue[12];

};

int main(int argc, char *argv[])

{

struct st_basic_trade st_basic_trade[MAX_ADDRESS_CNT];

struct st_basic_trade *address_byte_trade1;

struct st_basic_trade *address_byte_trade2;

struct st_basic_trade *address_byte_trade_tmp;

char *address_byte[MAX_ADDRESS_CNT];//st_basic_trade structure address saving pointer array

char *address_byte_tmp;//st_basic_trade structure address saving pointer

FILE *fp=NULL;//file pointer

char rbuf[4096];//file read buffer

char tmp1[200];

char tmp2[200];

int ii,kk,continue_tmp;

int st_basic_trade_cnt;

if((fp=fopen("BATCH_A0011.dat", "rt"))==NULL)

{

return(-1);

}

//DATA MEMORY INIT

for(kk=0; kk<MAX_ADDRESS_CNT; kk++)

{

memset(&st_basic_trade[kk],0x00,sizeof(st_basic_trade[kk]));

}

//DATA LOAD FROM FILE

kk=0;

while(1)

{

memset(rbuf,0x00,sizeof(rbuf));

if(fgets(rbuf,sizeof(rbuf),fp)==NULL) break;

memcpy(&st_basic_trade[kk], rbuf, (int)sizeof(st_basic_trade[kk]));

continue_tmp=-1;

if(memcmp(st_basic_trade[kk].stockgroupid,"ST",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"EF",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"RT",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"MF",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"SC",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"IF",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"DR",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"FS",2)==0) continue_tmp=100;

if(memcmp(st_basic_trade[kk].stockgroupid,"EN",2)==0) continue_tmp=100;

if(continue_tmp<0) continue;

kk++;

if(kk==MAX_ADDRESS_CNT) break;

}

st_basic_trade_cnt=kk;

if(fp != NULL) fclose(fp);

//POINTER MEMORY USE INSTEAD OF STRUCTURE STACK MEMORY

for(kk=0; kk<st_basic_trade_cnt; kk++)

{

address_byte[kk] = (char *)&st_basic_trade[kk];

}

//DESCENDING BY POINTER MEMORY

for(kk=0; kk<st_basic_trade_cnt; kk++)

{

for(ii=kk+1; ii<st_basic_trade_cnt; ii++)

{

address_byte_trade1 = (struct st_basic_trade *)address_byte[kk];

address_byte_trade2 = (struct st_basic_trade *)address_byte[ii];

memset(tmp1,0x00,sizeof(tmp1));

memset(tmp2,0x00,sizeof(tmp2));

sprintf(tmp1, "%.*s", (int)sizeof(address_byte_trade1->standardprice), address_byte_trade1->standardprice);

sprintf(tmp2, "%.*s", (int)sizeof(address_byte_trade2->standardprice), address_byte_trade2->standardprice);

if(atoi(tmp1) > atoi(tmp2))

{

address_byte_tmp=address_byte[kk];

address_byte[kk]=address_byte[ii];

address_byte[ii]=address_byte_tmp;

}

//RESULT DISPLAY

for(kk=0; kk<st_basic_trade_cnt; kk++)

{

address_byte_trade_tmp = (struct st_basic_trade *)address_byte[kk];

printf(

"[%.4d]:"

"(%.*s)"

"\n",

kk+1,

(int)sizeof(address_byte_trade_tmp->iskospi),address_byte_trade_tmp->iskospi,

(int)sizeof(address_byte_trade_tmp->dataclass),address_byte_trade_tmp->dataclass,

(int)sizeof(address_byte_trade_tmp->infoclass),address_byte_trade_tmp->infoclass,

(int)sizeof(address_byte_trade_tmp->serialno),address_byte_trade_tmp->serialno,

(int)sizeof(address_byte_trade_tmp->stockgroupid),address_byte_trade_tmp->stockgroupid,

(int)sizeof(address_byte_trade_tmp->abbrstockcode),address_byte_trade_tmp->abbrstockcode,

(int)sizeof(address_byte_trade_tmp->standardprice),address_byte_trade_tmp->standardprice,

(int)sizeof(address_byte_trade_tmp->ydayaccmvolume),address_byte_trade_tmp->ydayaccmvolume,

(int)sizeof(address_byte_trade_tmp->ydayaccmamount),address_byte_trade_tmp->ydayaccmamount,

(int)sizeof(address_byte_trade_tmp->uplimitprice),address_byte_trade_tmp->uplimitprice,

(int)sizeof(address_byte_trade_tmp->downlimitprice),address_byte_trade_tmp->downlimitprice,

(int)sizeof(address_byte_trade_tmp->abbrstocknameeng),address_byte_trade_tmp->abbrstocknameeng);

}

return(0);

}

/*RESULT

[0140]:(Y)(A0)(01)(00000068)(ST)(A000860 )(000035500)(000000012109)(000000000427932950)(000046150)(000024850)(KANGNAM JEVISCO )

[0141]:(Y)(A0)(01)(00000069)(ST)(A000880 )(000035550)(000000250112)(000000008841239150)(000046200)(000024900)(Hanwha )

[0142]:(Y)(A0)(01)(00000161)(ST)(A002390 )(000035800)(000000175128)(000000006200375550)(000046500)(000025100)(HANDOK )

[0143]:(Y)(A0)(01)(00000062)(ST)(A000720 )(000036000)(000000935395)(000000033665525250)(000046800)(000025200)(HyundaiEng&Const )

[0144]:(Y)(A0)(01)(00000168)(ST)(A002620 )(000037150)(000000043866)(000000001645729300)(000048250)(000026050)(JeilPharm )

[0145]:(Y)(A0)(01)(00000031)(ST)(A000180 )(000038150)(000000051172)(000000001962002000)(000049550)(000026750)(SCEHoldings )

[0146]:(Y)(A0)(01)(00000080)(ST)(A001060 )(000040300)(000000157559)(000000006374627600)(000052300)(000028250)(JWPHARMA )

[0147]:(Y)(A0)(01)(00000082)(ST)(A001067 )(000042550)(000000000536)(000000000022519300)(000055300)(000029800)(JWPHARMA(2PB) )

[0148]:(Y)(A0)(01)(00000063)(ST)(A000725 )(000043150)(000000000564)(000000000024648550)(000056000)(000030250)(HyundaiEng&Con(1P) )

[0149]:(Y)(A0)(01)(00000039)(ST)(A000270 )(000043550)(000001342543)(000000058170323500)(000056600)(000030500)(KiaMtr )

[0150]:(Y)(A0)(01)(00000147)(ST)(A002170 )(000044500)(000000010952)(000000000488631300)(000057800)(000031150)(SamyangTongsang )

[0151]:(Y)(A0)(01)(00000163)(ST)(A002420 )(000045400)(000000001276)(000000000057439100)(000059000)(000031800)(Century )

[0152]:(Y)(A0)(01)(00000126)(ST)(A001745 )(000045750)(000000001253)(000000000058412550)(000059400)(000032050)(SKNetworks(1P) )

[0153]:(Y)(A0)(01)(00000124)(ST)(A001725 )(000046950)(000000000551)(000000000025664750)(000061000)(000032900)(ShinyoungSecu(1P) )

[0154]:(Y)(A0)(01)(00000123)(ST)(A001720 )(000049550)(000000002054)(000000000101791900)(000064400)(000034700)(ShinyoungSecu )

[0155]:(Y)(A0)(01)(00000030)(ST)(A000157 )(000050500)(000000000118)(000000000005902400)(000065600)(000035400)(DOOSAN(2PB) )

[0156]:(Y)(A0)(01)(00000067)(ST)(A000850 )(000050800)(000000001558)(000000000079929400)(000066000)(000035600)(HMT )

[0157]:(Y)(A0)(01)(00000029)(ST)(A000155 )(000051000)(000000001053)(000000000053774400)(000066300)(000035700)(DOOSAN(1P) )

[0158]:(Y)(A0)(01)(00000192)(ST)(A003030 )(000051800)(000000009657)(000000000494291400)(000067300)(000036300)(SeAhStl )

[0159]:(Y)(A0)(01)(00000073)(ST)(A000950 )(000053000)(000000001352)(000000000072137200)(000068900)(000037100)(Chonbang )

[0160]:(Y)(A0)(01)(00000156)(ST)(A002320 )(000053200)(000000053672)(000000002833688300)(000069100)(000037300)(HanjinTrnspt )

[0161]:(Y)(A0)(01)(00000196)(ST)(A003080 )(000055200)(000000000851)(000000000046476300)(000071700)(000038700)(SungboChem )

[0162]:(Y)(A0)(01)(00000083)(ST)(A001070 )(000056400)(000000001586)(000000000088415000)(000073300)(000039500)(TaihanTextl )

[0163]:(Y)(A0)(01)(00000137)(ST)(A001940 )(000058300)(000000002805)(000000000163564100)(000075700)(000040900)(KISCO Holdings )

[0164]:(Y)(A0)(01)(00000114)(ST)(A001530 )(000059200)(000000001443)(000000000085351600)(000076900)(000041500)(Dongil )

[0165]:(Y)(A0)(01)(00000197)(ST)(A003090 )(000063200)(000000007172)(000000000457728500)(000082100)(000044300)(Daewoong )

[0166]:(Y)(A0)(01)(00000057)(ST)(A000650 )(000063600)(000000000824)(000000000053056100)(000082600)(000044600)(ChunilExp )

[0167]:(Y)(A0)(01)(00000140)(ST)(A002020 )(000070600)(000000044170)(000000003133398600)(000091700)(000049500)(KOLON CORP )

[0168]:(Y)(A0)(01)(00000028)(ST)(A000150 )(000072400)(000000117697)(000000008567840400)(000094100)(000050700)(DOOSAN )

[0169]:(Y)(A0)(01)(00000055)(ST)(A000590 )(000072600)(000000001684)(000000000122223400)(000094300)(000050900)(CSHOLDINGS )

[0170]:(Y)(A0)(01)(00000032)(ST)(A000210 )(000077600)(000000148934)(000000011570941400)(000100500)(000054400)(DaelimInd )

[0171]:(Y)(A0)(01)(00000020)(ST)(A000075 )(000077800)(000000000177)(000000000013515400)(000101000)(000054500)(SAMYANGHOLDINGS(1P) )

[0172]:(Y)(A0)(01)(00000048)(ST)(A000480 )(000080600)(000000000412)(000000000033291100)(000104500)(000056500)(ChosunRefrctr )

[0173]:(Y)(A0)(01)(00000179)(ST)(A002795 )(000087500)(000000052984)(000000004654231400)(000113500)(000061300)(AmoreG(1P) )

[0174]:(Y)(A0)(01)(00000205)(ST)(A003300 )(000094800)(000000020468)(000000001954590400)(000123000)(000066400)(HanilCement )

[0175]:(Y)(A0)(01)(00000142)(ST)(A002030 )(000098300)(000000000761)(000000000074790600)(000127500)(000068900)(ASIA HOLDINGS )

[0176]:(Y)(A0)(01)(00000198)(ST)(A003120 )(000107500)(000000000483)(000000000051978500)(000139500)(000075500)(IlsungPharm )

[0177]:(Y)(A0)(01)(00000119)(ST)(A001630 )(000120000)(000000020708)(000000002442273500)(000156000)(000084000)(CHONGKUNDANG HOLDINGS )

[0178]:(Y)(A0)(01)(00000079)(ST)(A001045 )(000135000)(000000002881)(000000000387653500)(000175500)(000094500)(CJ(1P) )

[0179]:(Y)(A0)(01)(00000200)(ST)(A003200 )(000148000)(000000001833)(000000000268996500)(000192000)(000104000)(IlshinSpng )

[0180]:(Y)(A0)(01)(00000178)(ST)(A002790 )(000161000)(000000715462)(000000113395522000)(000209000)(000113000)(AmoreG )

[0181]:(Y)(A0)(01)(00000167)(ST)(A002600 )(000161000)(000000000169)(000000000027542500)(000209000)(000113000)(CHOHEUNG )

[0182]:(Y)(A0)(01)(00000019)(ST)(A000070 )(000177000)(000000028579)(000000005043584000)(000230000)(000124000)(SAMYANGHOLDINGS )

[0183]:(Y)(A0)(01)(00000182)(ST)(A002840 )(000179000)(000000000063)(000000000011328500)(000232500)(000125500)(MiwonComcl )

[0184]:(Y)(A0)(01)(00000086)(ST)(A001130 )(000184000)(000000000647)(000000000119095000)(000239000)(000129000)(DaehanFlrMill )

[0185]:(Y)(A0)(01)(00000024)(ST)(A000105 )(000190000)(000000000029)(000000000005484500)(000247000)(000133000)(Yuhan(1P) )

[0186]:(Y)(A0)(01)(00000066)(ST)(A000815 )(000195000)(000000003175)(000000000613795000)(000253500)(000136500)(SamsungF&MIns(1P) )

[0187]:(Y)(A0)(01)(00000105)(ST)(A001465 )(000198500)(000000000076)(000000000015081500)(000258000)(000139000)(BYC(1P) )

[0188]:(Y)(A0)(01)(00000017)(ST)(A000050 )(000203000)(000000001581)(000000000318739000)(000263500)(000142500)(Kyungbang )

[0189]:(Y)(A0)(01)(00000056)(ST)(A000640 )(000214000)(000000013643)(000000002898145500)(000278000)(000150000)(Donga Socio Holdings )

[0190]:(Y)(A0)(01)(00000025)(ST)(A000120 )(000216000)(000000029404)(000000006392050500)(000280500)(000151500)(CJ korea express )

[0191]:(Y)(A0)(01)(00000078)(ST)(A001040 )(000281500)(000000039434)(000000011175365500)(000365500)(000197500)(CJ )

[0192]:(Y)(A0)(01)(00000065)(ST)(A000810 )(000303500)(000000038064)(000000011500917820)(000394500)(000212500)(SamsungF&MIns )

[0193]:(Y)(A0)(01)(00000023)(ST)(A000100 )(000330000)(000000030710)(000000010129506500)(000429000)(000231000)(Yuhan )

[0194]:(Y)(A0)(01)(00000160)(ST)(A002380 )(000432000)(000000014528)(000000006278496500)(000561000)(000302500)(KCC )

[0195]:(Y)(A0)(01)(00000187)(ST)(A002960 )(000485000)(000000000772)(000000000378426000)(000630000)(000339500)(HankookShellOil )

[0196]:(Y)(A0)(01)(00000104)(ST)(A001460 )(000532000)(000000000326)(000000000172720000)(000691000)(000373000)(BYC )

[0197]:(Y)(A0)(01)(00000059)(ST)(A000670 )(000931000)(000000001930)(000000001790511000)(001210000)(000652000)(Youngpoong )

[0198]:(Y)(A0)(01)(00000153)(ST)(A002270 )(000943000)(000000003189)(000000002984664000)(001225000)(000661000)(LotteFood )

[0199]:(Y)(A0)(01)(00000203)(ST)(A003240 )(000986000)(000000000664)(000000000656189000)(001281000)(000691000)(TaekwangInd )

[0200]:(Y)(A0)(01)(00000134)(ST)(A001800 )(001028000)(000000010402)(000000010702212000)(001336000)(000720000)(ORION )

bash-3.1$

*/

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#include <stdio.h>

#include <string.h>

typedef struct ____HM

{

int hh;

int mm;

}HM;

//시간(HH:MM)10:00에서 unit(MINUTE)만큼 뺄때에 구해지는 HH:MM을 계산

void ____get_hour_min(HM *sihm, int unit)

{

int divide_hh, divide_mm, share;

divide_hh = (int)(unit / 60);

divide_mm = unit - (int)(unit / 60) * 60;

if(divide_mm > 0) share = 1;

else share = 0;

sihm->hh = 10 - divide_hh - share;

if(share==1) sihm->mm = 60 - divide_mm;

else sihm->mm = divide_mm;

}

int main(int argc, char *argv[])

{

HM sihm;

int kk;

//10:00에서 61분에서 300분까지를 빼서 나오는결과를 출력

for(kk=61; kk<300; kk++)

{

____get_hour_min( &sihm, kk);

printf("MINUTE(%.6d),sihm.hh(%d),sihm.mm(%d)=HH:MM(%02d:%02d)\n", kk, sihm.hh, sihm.mm, sihm.hh, sihm.mm);

}

return(0);

}

/*

bash-3.1$ gcc -c 61.c

bash-3.1$

bash-3.1$ gcc -o 61 61.o

bash-3.1$

bash-3.1$ 61

MINUTE(000061),sihm.hh(08),sihm.mm(59)=HH:MM(08:59)

MINUTE(000062),sihm.hh(08),sihm.mm(58)=HH:MM(08:58)

MINUTE(000063),sihm.hh(08),sihm.mm(57)=HH:MM(08:57)

MINUTE(000064),sihm.hh(08),sihm.mm(56)=HH:MM(08:56)

MINUTE(000065),sihm.hh(08),sihm.mm(55)=HH:MM(08:55)

MINUTE(000066),sihm.hh(08),sihm.mm(54)=HH:MM(08:54)

MINUTE(000067),sihm.hh(08),sihm.mm(53)=HH:MM(08:53)

MINUTE(000068),sihm.hh(08),sihm.mm(52)=HH:MM(08:52)

MINUTE(000069),sihm.hh(08),sihm.mm(51)=HH:MM(08:51)

MINUTE(000070),sihm.hh(08),sihm.mm(50)=HH:MM(08:50)

MINUTE(000071),sihm.hh(08),sihm.mm(49)=HH:MM(08:49)

MINUTE(000072),sihm.hh(08),sihm.mm(48)=HH:MM(08:48)

MINUTE(000073),sihm.hh(08),sihm.mm(47)=HH:MM(08:47)

MINUTE(000074),sihm.hh(08),sihm.mm(46)=HH:MM(08:46)

MINUTE(000075),sihm.hh(08),sihm.mm(45)=HH:MM(08:45)

MINUTE(000076),sihm.hh(08),sihm.mm(44)=HH:MM(08:44)

MINUTE(000077),sihm.hh(08),sihm.mm(43)=HH:MM(08:43)

MINUTE(000078),sihm.hh(08),sihm.mm(42)=HH:MM(08:42)

MINUTE(000079),sihm.hh(08),sihm.mm(41)=HH:MM(08:41)

MINUTE(000080),sihm.hh(08),sihm.mm(40)=HH:MM(08:40)

MINUTE(000081),sihm.hh(08),sihm.mm(39)=HH:MM(08:39)

MINUTE(000082),sihm.hh(08),sihm.mm(38)=HH:MM(08:38)

MINUTE(000083),sihm.hh(08),sihm.mm(37)=HH:MM(08:37)

MINUTE(000084),sihm.hh(08),sihm.mm(36)=HH:MM(08:36)

MINUTE(000085),sihm.hh(08),sihm.mm(35)=HH:MM(08:35)

MINUTE(000086),sihm.hh(08),sihm.mm(34)=HH:MM(08:34)

MINUTE(000087),sihm.hh(08),sihm.mm(33)=HH:MM(08:33)

MINUTE(000088),sihm.hh(08),sihm.mm(32)=HH:MM(08:32)

MINUTE(000089),sihm.hh(08),sihm.mm(31)=HH:MM(08:31)

MINUTE(000090),sihm.hh(08),sihm.mm(30)=HH:MM(08:30)

MINUTE(000091),sihm.hh(08),sihm.mm(29)=HH:MM(08:29)

MINUTE(000092),sihm.hh(08),sihm.mm(28)=HH:MM(08:28)

MINUTE(000093),sihm.hh(08),sihm.mm(27)=HH:MM(08:27)

MINUTE(000094),sihm.hh(08),sihm.mm(26)=HH:MM(08:26)

MINUTE(000095),sihm.hh(08),sihm.mm(25)=HH:MM(08:25)

MINUTE(000096),sihm.hh(08),sihm.mm(24)=HH:MM(08:24)

MINUTE(000097),sihm.hh(08),sihm.mm(23)=HH:MM(08:23)

MINUTE(000098),sihm.hh(08),sihm.mm(22)=HH:MM(08:22)

MINUTE(000099),sihm.hh(08),sihm.mm(21)=HH:MM(08:21)

MINUTE(000100),sihm.hh(08),sihm.mm(20)=HH:MM(08:20)

MINUTE(000101),sihm.hh(08),sihm.mm(19)=HH:MM(08:19)

MINUTE(000102),sihm.hh(08),sihm.mm(18)=HH:MM(08:18)

MINUTE(000103),sihm.hh(08),sihm.mm(17)=HH:MM(08:17)

MINUTE(000104),sihm.hh(08),sihm.mm(16)=HH:MM(08:16)

MINUTE(000105),sihm.hh(08),sihm.mm(15)=HH:MM(08:15)

MINUTE(000106),sihm.hh(08),sihm.mm(14)=HH:MM(08:14)

MINUTE(000107),sihm.hh(08),sihm.mm(13)=HH:MM(08:13)

MINUTE(000108),sihm.hh(08),sihm.mm(12)=HH:MM(08:12)

MINUTE(000109),sihm.hh(08),sihm.mm(11)=HH:MM(08:11)

MINUTE(000110),sihm.hh(08),sihm.mm(10)=HH:MM(08:10)

MINUTE(000111),sihm.hh(08),sihm.mm(09)=HH:MM(08:09)

MINUTE(000112),sihm.hh(08),sihm.mm(08)=HH:MM(08:08)

MINUTE(000113),sihm.hh(08),sihm.mm(07)=HH:MM(08:07)

MINUTE(000114),sihm.hh(08),sihm.mm(06)=HH:MM(08:06)

MINUTE(000115),sihm.hh(08),sihm.mm(05)=HH:MM(08:05)

MINUTE(000116),sihm.hh(08),sihm.mm(04)=HH:MM(08:04)

MINUTE(000117),sihm.hh(08),sihm.mm(03)=HH:MM(08:03)

MINUTE(000118),sihm.hh(08),sihm.mm(02)=HH:MM(08:02)

MINUTE(000119),sihm.hh(08),sihm.mm(01)=HH:MM(08:01)

MINUTE(000120),sihm.hh(08),sihm.mm(00)=HH:MM(08:00)

MINUTE(000121),sihm.hh(07),sihm.mm(59)=HH:MM(07:59)

MINUTE(000122),sihm.hh(07),sihm.mm(58)=HH:MM(07:58)

MINUTE(000123),sihm.hh(07),sihm.mm(57)=HH:MM(07:57)

MINUTE(000124),sihm.hh(07),sihm.mm(56)=HH:MM(07:56)

MINUTE(000125),sihm.hh(07),sihm.mm(55)=HH:MM(07:55)

MINUTE(000126),sihm.hh(07),sihm.mm(54)=HH:MM(07:54)

MINUTE(000127),sihm.hh(07),sihm.mm(53)=HH:MM(07:53)

MINUTE(000128),sihm.hh(07),sihm.mm(52)=HH:MM(07:52)

MINUTE(000129),sihm.hh(07),sihm.mm(51)=HH:MM(07:51)

MINUTE(000130),sihm.hh(07),sihm.mm(50)=HH:MM(07:50)

MINUTE(000131),sihm.hh(07),sihm.mm(49)=HH:MM(07:49)

MINUTE(000132),sihm.hh(07),sihm.mm(48)=HH:MM(07:48)

MINUTE(000133),sihm.hh(07),sihm.mm(47)=HH:MM(07:47)

MINUTE(000134),sihm.hh(07),sihm.mm(46)=HH:MM(07:46)

MINUTE(000135),sihm.hh(07),sihm.mm(45)=HH:MM(07:45)

MINUTE(000136),sihm.hh(07),sihm.mm(44)=HH:MM(07:44)

MINUTE(000137),sihm.hh(07),sihm.mm(43)=HH:MM(07:43)

MINUTE(000138),sihm.hh(07),sihm.mm(42)=HH:MM(07:42)

MINUTE(000139),sihm.hh(07),sihm.mm(41)=HH:MM(07:41)

MINUTE(000140),sihm.hh(07),sihm.mm(40)=HH:MM(07:40)

MINUTE(000141),sihm.hh(07),sihm.mm(39)=HH:MM(07:39)

MINUTE(000142),sihm.hh(07),sihm.mm(38)=HH:MM(07:38)

MINUTE(000143),sihm.hh(07),sihm.mm(37)=HH:MM(07:37)

MINUTE(000144),sihm.hh(07),sihm.mm(36)=HH:MM(07:36)

MINUTE(000145),sihm.hh(07),sihm.mm(35)=HH:MM(07:35)

MINUTE(000146),sihm.hh(07),sihm.mm(34)=HH:MM(07:34)

MINUTE(000147),sihm.hh(07),sihm.mm(33)=HH:MM(07:33)

MINUTE(000148),sihm.hh(07),sihm.mm(32)=HH:MM(07:32)

MINUTE(000149),sihm.hh(07),sihm.mm(31)=HH:MM(07:31)

MINUTE(000150),sihm.hh(07),sihm.mm(30)=HH:MM(07:30)

MINUTE(000151),sihm.hh(07),sihm.mm(29)=HH:MM(07:29)

MINUTE(000152),sihm.hh(07),sihm.mm(28)=HH:MM(07:28)

MINUTE(000153),sihm.hh(07),sihm.mm(27)=HH:MM(07:27)

MINUTE(000154),sihm.hh(07),sihm.mm(26)=HH:MM(07:26)

MINUTE(000155),sihm.hh(07),sihm.mm(25)=HH:MM(07:25)

MINUTE(000156),sihm.hh(07),sihm.mm(24)=HH:MM(07:24)

MINUTE(000157),sihm.hh(07),sihm.mm(23)=HH:MM(07:23)

MINUTE(000158),sihm.hh(07),sihm.mm(22)=HH:MM(07:22)

MINUTE(000159),sihm.hh(07),sihm.mm(21)=HH:MM(07:21)

MINUTE(000160),sihm.hh(07),sihm.mm(20)=HH:MM(07:20)

MINUTE(000161),sihm.hh(07),sihm.mm(19)=HH:MM(07:19)

MINUTE(000162),sihm.hh(07),sihm.mm(18)=HH:MM(07:18)

MINUTE(000163),sihm.hh(07),sihm.mm(17)=HH:MM(07:17)

MINUTE(000164),sihm.hh(07),sihm.mm(16)=HH:MM(07:16)

MINUTE(000165),sihm.hh(07),sihm.mm(15)=HH:MM(07:15)

MINUTE(000166),sihm.hh(07),sihm.mm(14)=HH:MM(07:14)

MINUTE(000167),sihm.hh(07),sihm.mm(13)=HH:MM(07:13)

MINUTE(000168),sihm.hh(07),sihm.mm(12)=HH:MM(07:12)

MINUTE(000169),sihm.hh(07),sihm.mm(11)=HH:MM(07:11)

MINUTE(000170),sihm.hh(07),sihm.mm(10)=HH:MM(07:10)

MINUTE(000171),sihm.hh(07),sihm.mm(09)=HH:MM(07:09)

MINUTE(000172),sihm.hh(07),sihm.mm(08)=HH:MM(07:08)

MINUTE(000173),sihm.hh(07),sihm.mm(07)=HH:MM(07:07)

MINUTE(000174),sihm.hh(07),sihm.mm(06)=HH:MM(07:06)

MINUTE(000175),sihm.hh(07),sihm.mm(05)=HH:MM(07:05)

MINUTE(000176),sihm.hh(07),sihm.mm(04)=HH:MM(07:04)

MINUTE(000177),sihm.hh(07),sihm.mm(03)=HH:MM(07:03)

MINUTE(000178),sihm.hh(07),sihm.mm(02)=HH:MM(07:02)

MINUTE(000179),sihm.hh(07),sihm.mm(01)=HH:MM(07:01)

MINUTE(000180),sihm.hh(07),sihm.mm(00)=HH:MM(07:00)

MINUTE(000181),sihm.hh(06),sihm.mm(59)=HH:MM(06:59)

MINUTE(000182),sihm.hh(06),sihm.mm(58)=HH:MM(06:58)

MINUTE(000183),sihm.hh(06),sihm.mm(57)=HH:MM(06:57)

MINUTE(000184),sihm.hh(06),sihm.mm(56)=HH:MM(06:56)

MINUTE(000185),sihm.hh(06),sihm.mm(55)=HH:MM(06:55)

MINUTE(000186),sihm.hh(06),sihm.mm(54)=HH:MM(06:54)

MINUTE(000187),sihm.hh(06),sihm.mm(53)=HH:MM(06:53)

MINUTE(000188),sihm.hh(06),sihm.mm(52)=HH:MM(06:52)

MINUTE(000189),sihm.hh(06),sihm.mm(51)=HH:MM(06:51)

MINUTE(000190),sihm.hh(06),sihm.mm(50)=HH:MM(06:50)

MINUTE(000191),sihm.hh(06),sihm.mm(49)=HH:MM(06:49)

MINUTE(000192),sihm.hh(06),sihm.mm(48)=HH:MM(06:48)

MINUTE(000193),sihm.hh(06),sihm.mm(47)=HH:MM(06:47)

MINUTE(000194),sihm.hh(06),sihm.mm(46)=HH:MM(06:46)

MINUTE(000195),sihm.hh(06),sihm.mm(45)=HH:MM(06:45)

MINUTE(000196),sihm.hh(06),sihm.mm(44)=HH:MM(06:44)

MINUTE(000197),sihm.hh(06),sihm.mm(43)=HH:MM(06:43)

MINUTE(000198),sihm.hh(06),sihm.mm(42)=HH:MM(06:42)

MINUTE(000199),sihm.hh(06),sihm.mm(41)=HH:MM(06:41)

MINUTE(000200),sihm.hh(06),sihm.mm(40)=HH:MM(06:40)

MINUTE(000201),sihm.hh(06),sihm.mm(39)=HH:MM(06:39)

MINUTE(000202),sihm.hh(06),sihm.mm(38)=HH:MM(06:38)

MINUTE(000203),sihm.hh(06),sihm.mm(37)=HH:MM(06:37)

MINUTE(000204),sihm.hh(06),sihm.mm(36)=HH:MM(06:36)

MINUTE(000205),sihm.hh(06),sihm.mm(35)=HH:MM(06:35)

MINUTE(000206),sihm.hh(06),sihm.mm(34)=HH:MM(06:34)

MINUTE(000207),sihm.hh(06),sihm.mm(33)=HH:MM(06:33)

MINUTE(000208),sihm.hh(06),sihm.mm(32)=HH:MM(06:32)

MINUTE(000209),sihm.hh(06),sihm.mm(31)=HH:MM(06:31)

MINUTE(000210),sihm.hh(06),sihm.mm(30)=HH:MM(06:30)

MINUTE(000211),sihm.hh(06),sihm.mm(29)=HH:MM(06:29)

MINUTE(000212),sihm.hh(06),sihm.mm(28)=HH:MM(06:28)

MINUTE(000213),sihm.hh(06),sihm.mm(27)=HH:MM(06:27)

MINUTE(000214),sihm.hh(06),sihm.mm(26)=HH:MM(06:26)

MINUTE(000215),sihm.hh(06),sihm.mm(25)=HH:MM(06:25)

MINUTE(000216),sihm.hh(06),sihm.mm(24)=HH:MM(06:24)

MINUTE(000217),sihm.hh(06),sihm.mm(23)=HH:MM(06:23)

MINUTE(000218),sihm.hh(06),sihm.mm(22)=HH:MM(06:22)

MINUTE(000219),sihm.hh(06),sihm.mm(21)=HH:MM(06:21)

MINUTE(000220),sihm.hh(06),sihm.mm(20)=HH:MM(06:20)

MINUTE(000221),sihm.hh(06),sihm.mm(19)=HH:MM(06:19)

MINUTE(000222),sihm.hh(06),sihm.mm(18)=HH:MM(06:18)

MINUTE(000223),sihm.hh(06),sihm.mm(17)=HH:MM(06:17)

MINUTE(000224),sihm.hh(06),sihm.mm(16)=HH:MM(06:16)

MINUTE(000225),sihm.hh(06),sihm.mm(15)=HH:MM(06:15)

MINUTE(000226),sihm.hh(06),sihm.mm(14)=HH:MM(06:14)

MINUTE(000227),sihm.hh(06),sihm.mm(13)=HH:MM(06:13)

MINUTE(000228),sihm.hh(06),sihm.mm(12)=HH:MM(06:12)

MINUTE(000229),sihm.hh(06),sihm.mm(11)=HH:MM(06:11)

MINUTE(000230),sihm.hh(06),sihm.mm(10)=HH:MM(06:10)

MINUTE(000231),sihm.hh(06),sihm.mm(09)=HH:MM(06:09)

MINUTE(000232),sihm.hh(06),sihm.mm(08)=HH:MM(06:08)

MINUTE(000233),sihm.hh(06),sihm.mm(07)=HH:MM(06:07)

MINUTE(000234),sihm.hh(06),sihm.mm(06)=HH:MM(06:06)

MINUTE(000235),sihm.hh(06),sihm.mm(05)=HH:MM(06:05)

MINUTE(000236),sihm.hh(06),sihm.mm(04)=HH:MM(06:04)

MINUTE(000237),sihm.hh(06),sihm.mm(03)=HH:MM(06:03)

MINUTE(000238),sihm.hh(06),sihm.mm(02)=HH:MM(06:02)

MINUTE(000239),sihm.hh(06),sihm.mm(01)=HH:MM(06:01)

MINUTE(000240),sihm.hh(06),sihm.mm(00)=HH:MM(06:00)

MINUTE(000241),sihm.hh(05),sihm.mm(59)=HH:MM(05:59)

MINUTE(000242),sihm.hh(05),sihm.mm(58)=HH:MM(05:58)

MINUTE(000243),sihm.hh(05),sihm.mm(57)=HH:MM(05:57)

MINUTE(000244),sihm.hh(05),sihm.mm(56)=HH:MM(05:56)

MINUTE(000245),sihm.hh(05),sihm.mm(55)=HH:MM(05:55)

MINUTE(000246),sihm.hh(05),sihm.mm(54)=HH:MM(05:54)

MINUTE(000247),sihm.hh(05),sihm.mm(53)=HH:MM(05:53)

MINUTE(000248),sihm.hh(05),sihm.mm(52)=HH:MM(05:52)

MINUTE(000249),sihm.hh(05),sihm.mm(51)=HH:MM(05:51)

MINUTE(000250),sihm.hh(05),sihm.mm(50)=HH:MM(05:50)

MINUTE(000251),sihm.hh(05),sihm.mm(49)=HH:MM(05:49)

MINUTE(000252),sihm.hh(05),sihm.mm(48)=HH:MM(05:48)

MINUTE(000253),sihm.hh(05),sihm.mm(47)=HH:MM(05:47)

MINUTE(000254),sihm.hh(05),sihm.mm(46)=HH:MM(05:46)

MINUTE(000255),sihm.hh(05),sihm.mm(45)=HH:MM(05:45)

MINUTE(000256),sihm.hh(05),sihm.mm(44)=HH:MM(05:44)

MINUTE(000257),sihm.hh(05),sihm.mm(43)=HH:MM(05:43)

MINUTE(000258),sihm.hh(05),sihm.mm(42)=HH:MM(05:42)

MINUTE(000259),sihm.hh(05),sihm.mm(41)=HH:MM(05:41)

MINUTE(000260),sihm.hh(05),sihm.mm(40)=HH:MM(05:40)

MINUTE(000261),sihm.hh(05),sihm.mm(39)=HH:MM(05:39)

MINUTE(000262),sihm.hh(05),sihm.mm(38)=HH:MM(05:38)

MINUTE(000263),sihm.hh(05),sihm.mm(37)=HH:MM(05:37)

MINUTE(000264),sihm.hh(05),sihm.mm(36)=HH:MM(05:36)

MINUTE(000265),sihm.hh(05),sihm.mm(35)=HH:MM(05:35)

MINUTE(000266),sihm.hh(05),sihm.mm(34)=HH:MM(05:34)

MINUTE(000267),sihm.hh(05),sihm.mm(33)=HH:MM(05:33)

MINUTE(000268),sihm.hh(05),sihm.mm(32)=HH:MM(05:32)

MINUTE(000269),sihm.hh(05),sihm.mm(31)=HH:MM(05:31)

MINUTE(000270),sihm.hh(05),sihm.mm(30)=HH:MM(05:30)

MINUTE(000271),sihm.hh(05),sihm.mm(29)=HH:MM(05:29)

MINUTE(000272),sihm.hh(05),sihm.mm(28)=HH:MM(05:28)

MINUTE(000273),sihm.hh(05),sihm.mm(27)=HH:MM(05:27)

MINUTE(000274),sihm.hh(05),sihm.mm(26)=HH:MM(05:26)

MINUTE(000275),sihm.hh(05),sihm.mm(25)=HH:MM(05:25)

MINUTE(000276),sihm.hh(05),sihm.mm(24)=HH:MM(05:24)

MINUTE(000277),sihm.hh(05),sihm.mm(23)=HH:MM(05:23)

MINUTE(000278),sihm.hh(05),sihm.mm(22)=HH:MM(05:22)

MINUTE(000279),sihm.hh(05),sihm.mm(21)=HH:MM(05:21)

MINUTE(000280),sihm.hh(05),sihm.mm(20)=HH:MM(05:20)

MINUTE(000281),sihm.hh(05),sihm.mm(19)=HH:MM(05:19)

MINUTE(000282),sihm.hh(05),sihm.mm(18)=HH:MM(05:18)

MINUTE(000283),sihm.hh(05),sihm.mm(17)=HH:MM(05:17)

MINUTE(000284),sihm.hh(05),sihm.mm(16)=HH:MM(05:16)

MINUTE(000285),sihm.hh(05),sihm.mm(15)=HH:MM(05:15)

MINUTE(000286),sihm.hh(05),sihm.mm(14)=HH:MM(05:14)

MINUTE(000287),sihm.hh(05),sihm.mm(13)=HH:MM(05:13)

MINUTE(000288),sihm.hh(05),sihm.mm(12)=HH:MM(05:12)

MINUTE(000289),sihm.hh(05),sihm.mm(11)=HH:MM(05:11)

MINUTE(000290),sihm.hh(05),sihm.mm(10)=HH:MM(05:10)

MINUTE(000291),sihm.hh(05),sihm.mm(09)=HH:MM(05:09)

MINUTE(000292),sihm.hh(05),sihm.mm(08)=HH:MM(05:08)

MINUTE(000293),sihm.hh(05),sihm.mm(07)=HH:MM(05:07)

MINUTE(000294),sihm.hh(05),sihm.mm(06)=HH:MM(05:06)

MINUTE(000295),sihm.hh(05),sihm.mm(05)=HH:MM(05:05)

MINUTE(000296),sihm.hh(05),sihm.mm(04)=HH:MM(05:04)

MINUTE(000297),sihm.hh(05),sihm.mm(03)=HH:MM(05:03)

MINUTE(000298),sihm.hh(05),sihm.mm(02)=HH:MM(05:02)

MINUTE(000299),sihm.hh(05),sihm.mm(01)=HH:MM(05:01)

bash-3.1$

*/

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gcc -o sample sample.o -lm 시에 m의 의미는?

라이브러리파일을 찾기위한 하나의 INDEX 문자열이다.

#include <math.h> 는 헤더이고, 오브젝트는 libm.a입니다.

여기에서, lib와 .a사이에 문자열스트링을 가지고 LINK시에 파일을 참조해서 LINK합니다.

예를 들어 다음과 같은 함수의 프로토타입은 math.h에 선언되어져 있어서 compile시에 성공적으로 수행되지만,

실제 LINK에는 라이브러리 파일의 오브젝트를 참조하기때문에 헤더와 라이브러리 오브젝트는 분리되어 있습니다.

ㅡㅡㅡㅡㅡㅡㅡㅡsin함수의 프로토타입(math.h에 선언되어져 있습니다.)ㅡㅡㅡㅡㅡㅡ

double sin(double x); sine 계산

float sinf(float x); sine 계산

long double sinl(long double x); sine 계산

입력 매개 변수 리스트 : x radian

반환 값 : sine 값

ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡ

sin함수의 구현은 libm.a에 바이너리형태로 구현되어 있습니다.

(오브젝트파일 -> 아카이브파일로 묶여있음)

bash-3.1$

bash-3.1$ find ./ -name libm.*

find: `./Documents and Settings': Permission denied

./MinGW/lib/libm.a (반드시 LINK할 디렉토리는 Makefile PATH에 설정되어 있어야 합니다.

find: `./Program Files/Windows NT/\272\270\301\266\307\301\267\316\261\327\267\245': Permission denied

find: File system loop detected; `./ProgramData/Application Data' is part of the same file system loop as `./ProgramData'.

find: `./ProgramData/Desktop': Permission denied

find: `./ProgramData/Documents': Permission denied

find: `./ProgramData/Favorites': Permission denied

find: `./ProgramData/Microsoft/Diagnosis/SoftLanding': Permission denied

find: `./ProgramData/Microsoft/Diagnosis/SoftLandingStage': Permission denied

find: `./ProgramData/Microsoft/Windows/Start Menu/\307\301\267\316\261\327\267\245': Permission denied

find: `./ProgramData/Start Menu': Permission denied

find: `./ProgramData/Templates': Permission denied

find: `./ProgramData/\271\331\305\301 \310\255\270\351': Permission denied

find: `./ProgramData/\275\303\300\333 \270\336\264\272': Permission denied

find: `./System Volume Information': Permission denied

find: File system loop detected; `./Users/All Users/Application Data' is part of the same file system loop as `./Users/All Users'.

find: `./Users/All Users/Desktop': Permission denied

find: `./Users/All Users/Documents': Permission denied

find: `./Users/All Users/Favorites': Permission denied

find: `./Users/All Users/Microsoft/Diagnosis/SoftLanding': Permission denied

find: `./Users/All Users/Microsoft/Diagnosis/SoftLandingStage': Permission denied

find: `./Users/All Users/Microsoft/Windows/Start Menu/\307\301\267\316\261\327\267\245': Permission denied

find: `./Users/All Users/Start Menu': Permission denied

find: `./Users/All Users/Templates': Permission denied

find: `./Users/All Users/\271\331\305\301 \310\255\270\351': Permission denied

find: `./Users/All Users/\275\303\300\333 \270\336\264\272': Permission denied

find: File system loop detected; `./Users/Default/AppData/Local/Application Data' is part of the same file system loop as `./Users/Default/AppData/Local'.

find: `./Users/Default/AppData/Local/History': Permission denied

find: `./Users/Default/AppData/Local/Temporary Internet Files': Permission denied

find: `./Users/Default/AppData/Roaming/Microsoft/Windows/Start Menu/\307\301\267\316\261\327\267\245': Permission denied

find: `./Users/Default/Application Data': Permission denied

find: `./Users/Default/Cookies': Permission denied

find: `./Users/Default/Documents/My Music': Permission denied

find: `./Users/Default/Documents/My Pictures': Permission denied

find: `./Users/Default/Documents/My Videos': Permission denied

find: `./Users/Default/Local Settings': Permission denied

find: `./Users/Default/My Documents': Permission denied

find: `./Users/Default/NetHood': Permission denied

find: `./Users/Default/PrintHood': Permission denied

find: `./Users/Default/Recent': Permission denied

find: `./Users/Default/SendTo': Permission denied

find: `./Users/Default/Start Menu': Permission denied

find: `./Users/Default/Templates': Permission denied

find: `./Users/Default/\275\303\300\333 \270\336\264\272': Permission denied

find: `./Users/Default User': Permission denied

find: `./Users/Public/Documents/My Music': Permission denied

find: `./Users/Public/Documents/My Pictures': Permission denied

find: `./Users/Public/Documents/My Videos': Permission denied

find: `./Windows/CSC/v2.0.6': Permission denied

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/*

LINUX,SERVER,SELECT(RECV),SELECT(SEND)

*/

#include <stdio.h>

#include <fcntl.h>

#include <stdlib.h>

#include <signal.h>

#include <sys/socket.h>

#include <sys/file.h>

#include <netinet/in.h>

#include <string.h>

#define MAXLINE 512

#define MAX_SOCK 64

char *escapechar = "exit";

int maxfdp1;

int g_num_chat = 0;

int s;

int client_s[MAX_SOCK];

static int getmax(int);

static void removeclient(int);

static int getdottedipaddr(int sd, struct sockaddr_in *addr);

static void my_signal(int signo);

int main(int argc, char *argv[])

{

char rline[MAXLINE+1];

char *start = "Connected to chat-server\n";

int i, j, n;

int client_fd, clilen;

fd_set read_fds;

struct sockaddr_in client_addr, server_addr;

if (argc != 2) {

printf("usage : %s port\n", argv[0]);

return(-1);

}

if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0) {

printf("can't open stream socket.");

return(-2);

}

bzero((char *)&server_addr, sizeof(server_addr));

server_addr.sin_family = AF_INET;

server_addr.sin_addr.s_addr = htonl(INADDR_ANY);

server_addr.sin_port = htons(atoi(argv[1]));

if (bind(s, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {

printf("Server: Can't bind local address.\n");

return(-3);

}

if (signal(SIGINT, my_signal) == SIG_ERR) { /* Ctrl+C */

printf("Server: signal(SIGINT) error\n");

return(-4);

}

if (signal(SIGTERM, my_signal) == SIG_ERR) { /* software termination */

printf("Server: signal(SIGTERM) error\n");

return(-5);

}

if (signal(SIGQUIT, my_signal) == SIG_ERR) { /* Ctrl+\ */

printf("Server: signal(SIGQUIT) error\n");

return(-6);

}

listen(s, 5); /* backlog = 5 */

maxfdp1 = s + 1;

while (1)

{

FD_ZERO(&read_fds);

FD_SET(s, &read_fds);

for (ii=0; ii < g_num_chat; ii++)

{

FD_SET(client_s[ii], &read_fds);

}

maxfdp1 = getmax(s) + 1; /* maxfdp1 재 계산 */

/*wait & response*/

if (select(maxfdp1, &read_fds, (fd_set *)0, (fd_set *)0, (struct timeval *)0) < 0)

{

printf("select error.\n");

break;

}

if (FD_ISSET(s, &read_fds))

{

clilen = sizeof(client_addr);

client_fd = accept(s, (struct sockaddr *)&client_addr, &clilen);

if (client_fd == -1)

{

printf("server: accept error\n");

break;

}

client_s[g_num_chat] = client_fd;

g_num_chat++;

/*welcome message*/

send(client_fd, start, strlen(start), 0);

if (getdottedipaddr(client_fd, &client_addr) > -1)

printf("%d number additional(IP: %s)\n", g_num_chat, inet_ntoa(client_addr.sin_addr));

else

printf("%d number additional\n", g_num_chat);

}

for (ii=0; ii<g_num_chat; ii++)

{

if (FD_ISSET(client_s[ii], &read_fds))

{

if ((n = recv(client_s[ii], rline, MAXLINE, 0)) <= 0)

{

removeclient(ii); /* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit */

continue;

}

rline[n] = '\0';

if (strstr(rline, escapechar) != NULL)

{

removeclient(ii); /* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit */

continue;

}

for (kk=0; kk<g_num_chat; kk++)

{

send(client_s[kk], rline, n, 0);

}

if (getdottedipaddr(client_fd, &client_addr) > -1)

printf("IP: %s -> %s", inet_ntoa(client_addr.sin_addr), rline);

else

printf("%s", rline);

}

} /* while */

my_signal(SIGIO);

}

void removeclient(int indx)

{

struct sockaddr_in client_addr;

if (getdottedipaddr(client_s[indx], &client_addr) > -1)

printf("1 number expired!!(IP: %s).", inet_ntoa(client_addr.sin_addr));

else

printf("1 number expired!!.");

close(client_s[indx]);

if (indx != g_num_chat-1) client_s[indx] = client_s[g_num_chat-1];

g_num_chat--;

printf("now number = %d\n", g_num_chat);

}

int getmax(int k) {

int max = k;

int r;

for (r=0; r < g_num_chat; r++)

{

if (client_s[r] > max) max = client_s[r];

}

return max;

}

/* 소켓에 연결된 상대방 주소를 알아낸다 */

int getdottedipaddr(int sd, struct sockaddr_in *addr) {

struct sockaddr_in client_addr;

int len, r;

len = sizeof(client_addr);

if ((r = getpeername(sd, (struct sockaddr *)&client_addr, &len)) == 0)

{

*addr = client_addr;

}

return r;

}

/* 시그널 처리 함수 정의 */

void my_signal(int signo)

{

int ii;

/* 대부분의 시그널(SIGILL과 SIGTRAP 은 제외)에 대한 처리 함수는 시그널이 포작된 후

즉시 재지정된다. 이것은 프로세스가 시그널의 처리 함수를 잊어버리고, 다음에 시그널이

도착하면 묵시적 처리함수인 SIG_DFL 을 수행하는 것을 의미한다.

이것은 특히 사용자가 인터럽트키를 여러번 누를 수도 있는 대화명 프로그램에서 문제가 된다

그러므로 시그널 함수가 호출되자 마자 SIGINT 시그널을 무시한다 */

signal(SIGINT, SIG_IGN);

signal(SIGTERM, SIG_IGN);

signal(SIGQUIT, SIG_IGN);

close(s);

for (ii=0; ii < g_num_chat; ii++)

{

close(client_s[ii]);

}

exit(0);

}

/*----------------------------------------------------------------------------------------------------

socket function : accept

1. 소켓에 연결을 받아들인다.

#include <sys/types.h>

#include <sys/socket.h>

int accept(int s, struct sockaddr *addr, socklen_t *addrlen);

2. 설명

accept() 함수는 연결지향 소켓 타입 (SOCK_STREAM, SOCK_SEQPACKET, SOCK_RDM)에 사용된다.

이것은 아직 처리되지 않은 연결들이 대기하고 있는 큐에서 제일 처음 연결된 연결을 가져와서 새로운 연결된 소켓을 만든다.

그리고 소켓을 가르키는 파일 지정자를 할당하고 이것을 리턴한다.

인자 s 는 socket() 로 만들어진 end-point(듣기 소켓)을 위한 파일지정자이다.

인자 addr 는 sockaddr 구조체에 대한 포인터이다.

연결이 성공되면 이 구조체를 채워서 되돌려 주게 되고,

우리는 이구조체의 정보를 이용해서 연결된 클라이언트의 인터넷 정보를 알아낼수 있다. addrlen 인자는 addr의 크기 이다.

만약 미결인 연결이 큐에 존재하지 않고, 소켓이 비봉쇄가 아니라면 accept 는 연결이 존재할때까지 해당영역에서 봉쇄된다.

비봉쇄 소켓일경우에는 errno 로 EAGAIN 을 설정하고 바로 리턴한다.

3. 반환값

에러시 -1이 반환된다. 성공한다면 받아들인 소켓을 위한 파일지정번호 (0보다 큰)을 반환한다.

---------------------------------*/

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/*

LINUX,MULTICAST,UDP SERVER

*/

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <time.h>

#include <errno.h>

#include <fcntl.h>

#include <signal.h>

#include <setjmp.h>

#include <unistd.h>

#include <ctype.h>

#include <sys/ipc.h>

#include <sys/msg.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <netdb.h>

#include <sys/shm.h>

/*------------------------------------------------------------------------------------

TR_CODE DESC FRAME_ID MULTICAST_GROUP REAL_PORT

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19711

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19712

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19713

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19714

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19715

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19716

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19717

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19718

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19719

A3012 체결 FID_KOSDAQCHEGYUL 233.37.54.51 19720

------------------------------------------------------------------------------------*/

/*USAGE------------------------------------------------------------------------------------

rcvmulticastdata 233.37.54.51 19711

rcvmulticastdata 233.37.54.51 19712

rcvmulticastdata 233.37.54.51 19713

rcvmulticastdata 233.37.54.51 19714

rcvmulticastdata 233.37.54.51 19715

rcvmulticastdata 233.37.54.51 19716

rcvmulticastdata 233.37.54.51 19717

..

------------------------------------------------------------------------------------*/

int main(int argc, char *argv[])

{

int send_s, recv_s;

unsigned int yes=1, ttl=32;

struct sockaddr_in mcast_group;

struct ip_mreq mreq;

struct sockaddr_in from;

int rlen, len, rtn;

if (argc != 3) {

printf("usage : %s multicastaddr port &\n", argv[0]);

exit(0);

}

for (;;)

{

//socket for multicast receive

memset((char *)&mcast_group, 0, sizeof(mcast_group));

mcast_group.sin_family = AF_INET;

mcast_group.sin_port = htons(atoi(argv[2]));

mcast_group.sin_addr.s_addr = inet_addr(argv[1]);

if ((recv_s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)

{

printf("error: can't create receive socket\n");

exit(0);

}

//multicast group register, and multicast network is defind by root user

mreq.imr_multiaddr = mcast_group.sin_addr;

//mreq.imr_interface.s_addr = htonl(INADDR_ANY);

//"192.178.33.142" is multicast network interface

mreq.imr_interface.s_addr = inet_addr("192.178.33.142");

if (setsockopt(recv_s, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0)

{

printf("error: add membership\n");

exit(0);

}

//socket re-use option set

if (setsockopt(recv_s, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0)

{

printf("error: so_reuseaddr setsockopt\n");

exit(0);

}

//socket bind

if (bind(recv_s, (struct sockaddr*)&mcast_group, sizeof(mcast_group)) < 0) {

printf("error: bind receive socket\n");

exit(0);

}

for (;;)

{

len = sizeof(from);

if ((rlen = recvfrom(recv_s, rbuf, SZ_MAX, 0, (struct sockaddr *)&from, &len)) < 0)

{

printf("error: recvfrom\n");

exit(0);

}

rbuf[rlen] = '\0';

printf("%s\n", rbuf);

}

close(recv_s);

usleep(1000);

}

return(0);

}

[Tip] semop() 세마포어 값을 변경

--------------------------------------------------------------------------------------------------------------------------

설명

--------------------------------------------------------------------------------------------------------------------------

semop() 함수는 세마포어의 값을 변경합니다. 세마포어를 사용하기 위해서는

먼저 세마포어 값을 1 감소시키고, 사용 후에는 1 증가시키는데, 이렇게 세마포어값을 증감하는 것을 요청하는 함수입니다.

--------------------------------------------------------------------------------------------------------------------------

헤더

--------------------------------------------------------------------------------------------------------------------------

#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/sem.h>

--------------------------------------------------------------------------------------------------------------------------

형태

--------------------------------------------------------------------------------------------------------------------------

int semop ( int semid, struct sembuf *sops, unsigned nsops )

--------------------------------------------------------------------------------------------------------------------------

인수

--------------------------------------------------------------------------------------------------------------------------

int semid 시스템에서 세머포어를 식별하는 집합 번호

struct sembuf *sops

세마포어 값을 계사하기위한 설정 값

struct sembuf {

short sem_num; 세마포어 번호

short sem_op; 세마포어 증감값

short sem_flg; 옵션

}

sem_flg sem_flg 내용

IPC_NOWAIT

호출 즉시 실행하지 못했을 경우 기다리지 않고 실패로 바로 복귀합니다.

SEM_UNDO 프로세스가 종료되면 시스템에서 세마포어 설저을 원래 상태로 되돌립니다. 그러므로 보통 이 옵션을 사용합니다.

unsigned nsops

변경하려는 세마포어 개수로 변경하려는 세마포어 개수가 여러 개일 때 사용합니다.

예를 들어 변경하려는 세마포어 개수가 한 개라면

struct sembuf sbuf = { 0, -1, 0};

semop( semmop, &sbuf, 1);

이렇게 값이 1이 되지만 한번에 2개 이상의 세마포어를 변경한다면,

struct sembuf pbuf[2] = {

{ 0, 1, 0} , // 첫번째 세마포어 값을 1 증가

{ 1, -1, 0} // 두번째 세마포어 값을 1 감소

}

semop( semmop, pbuf, 2);

--------------------------------------------------------------------------------------------------------------------------

반환

--------------------------------------------------------------------------------------------------------------------------

0 성공

-1 실패

--------------------------------------------------------------------------------------------------------------------------

예제

--------------------------------------------------------------------------------------------------------------------------

예제에서는 두개의 쓰레드를 만들어 첫번째 쓰레드는 카운터 값을 증가 시키고 두번째 쓰레드는 카운터를 화면에 출력합니다.

카운터가 5 이상의 값이 되면 두 개의 쓰레드는 모두 종료하고 프로그램이 종료되면서 세마포어를 삭제합니다.

여기서 세마포어는 각각의 쓰레드가 독립적으로 실행될수 있음을 보장하는 역할을 수행한다.

#include <pthread.h>

#include <stdlib.h>

#include <unistd.h>

#include <stdio.h>

#include <sys/ipc.h>

#include <sys/sem.h>

int cnt = 0;

static int semid;

void p()

{

struct sembuf pbuf;

pbuf.sem_num = 0;

pbuf.sem_op = -1;

pbuf.sem_flg = SEM_UNDO;

if ( -1 == semop(semid, &pbuf, 1))

printf( "p()-semop() 실행 오류\n");

}

void v()

{

struct sembuf vbuf;

vbuf.sem_num = 0;

vbuf.sem_op = 1;

vbuf.sem_flg = SEM_UNDO;

if ( -1 == semop( semid, &vbuf, 1))

printf( "v()-semop() 실행 오류\n");

}

void *fun_thread1(void *arg)

{

while( 1)

{

p();

printf( "thread1 실행\n");

if ( 5 < cnt)

{

printf( "thread1 완전 종료\n");

v();

break;

}

else

{

cnt++;

usleep( 100);

printf( "thread1 완료\n");

}

v();

}

return NULL;

}

void *fun_thread2(void *arg)

{

while( 1)

{

p();

printf( "thread2 실행\n");

if ( 5 < cnt)

{

printf( "thread2 완전 종료\n");

v();

break;

}

else

{

printf( "카운터= %d\n", cnt);

usleep( 100);

printf( "thread2 완료\n");

}

v();

}

return NULL;

}

int main(int argc, char *argv[])

{

pthread_t thread1;

pthread_t thread2;

union semun{

int val;

struct semid_ds *buf;

unsigned short int *arrary;

} arg;

if ( -1 == (semid = semget( IPC_PRIVATE, 1, IPC_CREAT | 0666)))

{

printf( "semget() 실행 오류\n");

return -1;

}

arg.val = 1; // 세마포어 값을 1로 설정

if ( -1 == semctl(semid, 0, SETVAL, arg))

{

printf( "semctl()-SETVAL 실행 오류\n");

return -1;

}

pthread_create(&thread1, NULL, fun_thread1, NULL);

pthread_create(&thread2, NULL, fun_thread2, NULL);

pthread_join( thread1, NULL);

pthread_join( thread2, NULL);

if ( -1 == semctl(semid, 0, IPC_RMID, arg))

{

printf( "semctl()-IPC_RMID 실행 오류\n");

return -1;

}

printf( "프로그램 종료\n");

return 0;

}

]$ gcc main.c -lpthread // 소스에 쓰레드를 이용하므로 옵션에 -lpthread를 추가

]$ ./a.out

thread1 실행

thread1 완료

thread2 실행

카운터= 1

thread2 완료

thread1 실행

thread1 완료

thread2 실행

카운터= 2

thread2 완료

thread1 실행

thread1 완료

thread2 실행

카운터= 3

thread2 완료

thread1 실행

thread1 완료

thread2 실행

카운터= 4

thread2 완료

thread1 실행

thread1 완료

thread2 실행

카운터= 5

thread2 완료

thread1 실행

thread1 완료

thread2 실행

thread2 완전 종료

thread1 실행

thread1 완전 종료

프로그램 종료

]$

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#include <windows.h>

#include <stdio.h>

#if(0)

gcc -Wall -DTEST_PRINTF -c win12.c

gcc -o win12 win12.o -lm -lws2_32 -lgdi32

#endif

void gotoxy(int x, int y) // 좌표 보내기 gotoxy

{

COORD Cur;

Cur.X=x;

Cur.Y=y;

SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),Cur);

}

void cursor(int n) // 커서 보이기 & 숨기기

{

HANDLE hConsole;

CONSOLE_CURSOR_INFO ConsoleCursor;

hConsole = GetStdHandle(STD_OUTPUT_HANDLE);

ConsoleCursor.bVisible = n;

ConsoleCursor.dwSize = 1;

SetConsoleCursorInfo(hConsole , &ConsoleCursor);

}

int main(void)

{

POINT pt; // 마우스 포인터

int x[50000]; // 매크로 x좌표

int y[50000]; // 매크로 y좌표

int sub_x[50000], sub_y[50000]; // 보조 xy

int check_mouse = 2; // 마우스 관련 변수

int i = 0; // 매크로 녹화시 이용

int n = 0; // 메크로 진행시 이용

system("mode con: cols=31 lines=13"); // 화면 고정

cursor(0); // 커서 숨기기

gotoxy(0,0);

puts("┏━━━━━━━━━━━━━┓"); // puts함수는 자동으로 줄바꿈 처리를 한다.

puts("┃　　　　　　　　　　　　　┃");

puts("┃ 　　 Mouse Macro　　　　┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┃　　F5 : 매크로 녹화 　　 ┃");

puts("┃　　F6 : 매크로 추가녹화　┃");

puts("┃　　F7 : 매크로 정지　　　┃");

puts("┃　　F8 : 매크로 시작　　　┃");

puts("┃　 F10 : 종료하기 　　　┃");

puts("┃　 F11 : 상세 도움말 　　 ┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┗━━━━━━━━━━━━━┛");

while(1)

{

if(GetKeyState(VK_F10) < 0) // F10키 누르면

{

return 0; // 프로그램 종료

}

else if(GetKeyState(VK_F11) < 0 ) // F11키 누르면

{

gotoxy(0,0);

puts("┏━━━━━━━━━━━━━┓");

puts("┃　　F5 : 매크로 녹화 　　 ┃");

puts("┃ >>처음부터 녹화를 시작　┃");

puts("┃　　F6 : 매크로 추가녹화　┃");

puts("┃　>>계속 이어서 녹화 　┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┃　 녹화 뒤 매크로 정지 후 ┃");

puts("┃　 매크로 시작을 누르면 ┃");

puts("┃　 매크로가 진행됩니다. 　┃");

puts("┃ (마우스 매크로만 가능) ┃");

puts("┃　　　Esc : 돌아가기　　　┃");

puts("┗━━━━━━━━━━━━━┛");

while(1)

{

if(GetKeyState(27) < 0) // Esc키 누르면

{

gotoxy(0,0);

puts("┏━━━━━━━━━━━━━┓");

puts("┃　　　　　　　　　　　　　┃");

puts("┃ 　　 Mouse Macro　　　　┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┃　　F5 : 매크로 녹화 　　 ┃");

puts("┃　　F6 : 매크로 추가녹화　┃");

puts("┃　　F7 : 매크로 정지　　　┃");

puts("┃　　F8 : 매크로 시작　　　┃");

puts("┃　 F10 : 종료하기 　　　┃");

puts("┃　 F11 : 상세 도움말 　　 ┃");

puts("┃　　　　　　　　　　　　　┃");

puts("┗━━━━━━━━━━━━━┛");

break; // while문 탈출

}

else if(GetKeyState(VK_F5) < 0 ) // 처음부터 다시 매크로 설정

{

for(i = 0 ; i <= 50000 ; i ++)

{

x[i] = -858993460; y[i] = -858993460; // 초기화 과정

sub_x[i] = -858993460; sub_y[i] = -858993460;

// 이때 모든 값은 모니터 해상도에 따라 마우스 좌표값이

// 될 수 있어서 쓰레기값인 -858993460을 이용했다.

// 추천하는 방법은 아니다.

}

i = 0;

while(1)

{

GetCursorPos(&pt); // 마우스 좌표값들 받아옴

x[i] = pt.x; // x좌표값 저장

y[i] = pt.y; // y좌표값 저장

sub_x[i] = 0, sub_y[i] = 0; // 왼쪽버튼 누르고 떼는 모습 저장하는 곳

i++; // i는 프레임을 의미

Sleep(10); // 0.01초 마다 1프레임 찍힘

if(GetKeyState(VK_LBUTTON) < 0 && check_mouse >= 1) // 왼쪽버튼 눌렀을 때

{

sub_x[i] = x[i-1];

sub_y[i] = y[i-1];

x[i] = 5000;

y[i] = 5000;

check_mouse = 0;

i++;

}

else if(GetKeyState(VK_LBUTTON) >= 0 && check_mouse == 0) // 왼쪽버튼 뗄 때

{

sub_x[i] = x[i-1];

sub_y[i] = y[i-1];

x[i] = 6000;

y[i] = 6000;

check_mouse = 1;

i++;

}

if(GetKeyState(VK_F7) < 0 )

{

break;

}

if(GetKeyState(VK_F10) < 0 )

{

return 0;

}

else if(GetKeyState(VK_F6) < 0 ) // 이어서 매크로 설정

{

while(1)

{

GetCursorPos(&pt);

x[i] = pt.x;

y[i] = pt.y;

sub_x[i] = 0, sub_y[i] = 0;

i++;

Sleep(10);

if(GetKeyState(VK_LBUTTON) < 0 && check_mouse >= 1) // 왼쪽버튼 눌렀을 때

{

sub_x[i] = x[i-1];

sub_y[i] = y[i-1];

x[i] = 5000;

y[i] = 5000;

check_mouse = 0;

i++;

}

else if(GetKeyState(VK_LBUTTON) >= 0 && check_mouse == 0) // 왼쪽버튼 뗄 때

{

sub_x[i] = x[i-1];

sub_y[i] = y[i-1];

x[i] = 6000;

y[i] = 6000;

check_mouse = 1;

i++;

}

if(GetKeyState(VK_F7) < 0 )

{

break;

}

if(GetKeyState(VK_F10) < 0 )

{

return 0;

}

else if(GetKeyState(VK_F8) < 0 ) // 매크로 재생

{

n = 0; // 프레임 처음으로 돌아가서 재생하기 위한 n

while(1)

{

if(x[n] == 5000) // 왼쪽버튼 눌러지는 것을 5000이라고 가정

{

mouse_event(MOUSEEVENTF_LEFTDOWN, sub_x[n], sub_y[n], 0, 0); // 좌표에 맞게 왼쪽버튼 누르기

Sleep(1);

}

else if(x[n] == 6000) // 왼쪽버튼 떼지는 것을 6000이라고 가정

{

mouse_event(MOUSEEVENTF_LEFTUP, sub_x[n], sub_y[n], 0, 0); // 좌표에 맞게 왼쪽버튼 떼기

Sleep(1);

}

if(x[n] == -858993460) // 쓰레기값 만나면 처리되는 작동

{

n = 0; // 즉, 매크로의 끝부분으로 가면 다시 n = 0 으로 하여 다시 처음부터 시작

}

SetCursorPos(x[n],y[n]); // 지정한 곳의 좌표로 마우스 이동

Sleep(10);

n++;

if(GetKeyState(VK_F7) < 0 )

{

break;

}

if(GetKeyState(VK_F10) < 0 )

{

return 0;

}

Sleep(10);

}

return 0;

}

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Copyright (c) 2009 Microsoft Corporation. All rights reserved.

bash-3.1$
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CC = gcc

CFLAGS += -I./include/ -g -Wall -Wno-unused-variable
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.c.o:
        $(CC) -c $< $(CFLAGS)

all: build

common.o : common.c
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win_calc_server.o : win_calc_server.c

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        $(CC) -o $@ $^ $(LIBS)
BUILD_FILES += win_calc_server

build: $(BUILD_FILES)

clean:
        rm -f *.o
        rm -f $(BUILD_FILES)
bash-3.1$ make clean
rm -f *.o
rm -f win_calc_server
bash-3.1$
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bash-3.1$ make all
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gcc -c calc_server.c -I./include/ -g -Wall -Wno-unused-variable
gcc -o win_calc_server win_calc_server.o pushcall.o common.o calc_server.o -L. -lcurl -ljson-c -lwsock32
bash-3.1$
bash-3.1$
bash-3.1$
bash-3.1$
bash-3.1$
bash-3.1$
bash-3.1$
bash-3.1$
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bash-3.1$

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#include <WinSock2.h>

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#define MAXLINE 1024

DWORD WINAPI stdin_input_send_thread(LPVOID arg);

char line[MAXLINE], chatdata[MAXLINE+1];

struct sockaddr_in server_addr;

SOCKET clientsocket; //server connect socket

char *escape = "quit"; //exit command message

BOOL bisquit; //exit falg variable

int main(int argc, char *argv[])

{

WSADATA wsa; //socket

HANDLE hthread; //thread

DWORD threadid;

int size;

if (argc != 3)

{

printf("usage : %s server_address port\n", argv[0]);

return(-1);

}

bisquit = FALSE;

//socket initialization

if (WSAStartup(MAKEWORD(2,2), &wsa) != 0)

{

return(-2);

}

//socket creation

if ((clientsocket = socket(AF_INET, SOCK_STREAM, 0)) < 0)

{

printf("fail make socket\n");

return(-3);

}

//memory initialization

memset(&server_addr, 0x00, sizeof(server_addr));

server_addr.sin_family = AF_INET;

server_addr.sin_addr.s_addr = inet_addr(argv[1]);

server_addr.sin_port = htons(atoi(argv[2]));

//connection with server

if (connect(clientsocket, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)

{

printf("fail connect to server\n");

return(-4);

}

else

{

printf("connected server\n");

}

//stdin & send data thread creation

hthread = CreateThread(NULL, 0, stdin_input_send_thread, 0, 0, &threadid);

if (hthread == NULL)

{

printf("fail make thread\n");

}

else

{

CloseHandle(hthread);

}

while (!bisquit)

{

memset(chatdata, 0x00, sizeof(chatdata));

if ((size = recv(clientsocket, chatdata, MAXLINE, 0)) == INVALID_SOCKET)

{

break;

}

else

{

chatdata[size] = '\0';

printf("%s", chatdata);

}

closesocket(clientsocket);

WSACleanup();

return(0);

}

//user data input mechanism

DWORD WINAPI stdin_input_send_thread(LPVOID arg)

{

while(TRUE)

{

//stream read in stdin, input '\n' character is ended.

if (fgets(chatdata, MAXLINE, stdin))

{

chatdata[strlen(chatdata) - 1] = 0x00;

sprintf(line, "%s", chatdata);

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{

printf("GoodBye!!!!!!!\n");

closesocket(clientsocket);

bisquit = TRUE;

return(-1);

}

if (send(clientsocket, line, strlen(line), 0) < 0)

{

printf("write fail\n");

return(-2);

}

return 0;

}

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/*

WINDOWS,SOCKET,SELECT,SERVER,TCP

WINDOWS,SOCKET,SELECT,SERVER,TCP,MULTI CHAT

*/

#include <stdio.h>

#include <fcntl.h>

#include <stdlib.h>

#include <winsock2.h>

#include <string.h>

#define MAXLINE 512

#define MAX_SOCK 64

#define bzero(b,len) (memset(b,0,len))

#define bcopy(b1,b2,len) (memcpy(b1,b2,len))

char *escapechar = "exit";

char send_calc_msg[MAXLINE+1];

//EXTERN LINK VARIABLE

char input[MAXLINE+1];

int maxfdp1;

int g_num_chat = 0;

int client_s[MAX_SOCK];

//STATIC LINK

static int getmax(int);

static void removeclient(int);

static int getdottedipaddr(int sd, struct sockaddr_in *addr);

//EXTERN LINK(calc_server.c)

int calculation_socket(char send_calc_msg[MAXLINE+1]);

//EXTERN LINK(pushcall.c)

int pushcall(void);

//EXTERN LINK(common.c)

int GetDate();

int GetTime();

int main(int argc, char *argv[])

{

char rline[MAXLINE+1], send_calc_msg[MAXLINE+1];

char *welcome_msg = "Connected to Server, Welcome!!!!!!!\n";

char tmp[1024];

int ii, kk, nn;

int client_fd, clilen, rc;

fd_set read_fds;

WSADATA wsadata;

SOCKET hservsock;

SOCKADDR_IN client_addr, server_addr;

if (argc != 2) {

printf("usage : %s port\n", argv[0]);

return(-1);

}

//The Windows Sockets WSAStartup function initiates use of WS2_32.DLL by a process.

//The WSAStartup function must be the first Windows Sockets function called by an application or DLL.

//It allows an application or DLL to specify the version of Windows Sockets required and to retrieve details of the specific Windows Sockets implementation.

//The application or DLL can only issue further Windows Sockets functions after a successfully calling

if(WSAStartup(MAKEWORD(2,2), &wsadata) != 0)

{

printf("Load Winsock 2.2 DLL Error\n");

return(-9);

}

printf(">>>>>1. wsastartup succ!!(%d)(%d)\n", GetDate(), GetTime());

hservsock=socket(PF_INET, SOCK_STREAM, 0);

if(hservsock==INVALID_SOCKET)

{

printf("socket() error\n");

return(-8);

}

printf(">>>>>2. socket succ!!(%d)(%d)\n", GetDate(), GetTime());

bzero((char *)&server_addr, sizeof(server_addr));

server_addr.sin_family = AF_INET;

server_addr.sin_addr.s_addr = htonl(INADDR_ANY);

server_addr.sin_port = htons(atoi(argv[1]));

if (bind(hservsock, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {

printf("server: can't bind local address.\n");

return(-3);

}

printf(">>>>>3. bind succ!!(%d)(%d)\n", GetDate(), GetTime());

listen(hservsock, 5); /* backlog = 5 */

printf(">>>>>4. listen succ!!(%d)(%d)\n", GetDate(), GetTime());

maxfdp1 = hservsock + 1;

printf(">>>>>5. main ok!!!!!!!(%d)(%d)\n", GetDate(), GetTime());

while (1)

{

//initialization with all user(send), server(receive)

FD_ZERO(&read_fds);

//FD_SET은 관찰을 할 소켓들을 등록하는 변수입니다.

//소켓이 새로 만들어지고 select()함수를 통해 관찰을 하고 싶다면 fd_set변수에 소켓을 등록해야 합니다.

//set register reference value with all user(send), server(receive)

FD_SET(hservsock, &read_fds);

for (ii=0; ii < g_num_chat; ii++)

{

FD_SET(client_s[ii], &read_fds);

}

//maxfdp1 variavle values re-calculation

maxfdp1 = getmax(hservsock) + 1;

/*wait & response, all client & server */

if (select(maxfdp1, &read_fds, (fd_set *)0, (fd_set *)0, (struct timeval *)0) < 0)

{

printf("server: select error.\n");

break;

}

//1. SELECT call and search change socket-filediscriptor

//2. CHANGED socket-filediscriptor, find socket-filediscriptor, send, recv, accept function call

//3. FD_ISSET(hservsock, &read_fds) is accept function calling

//4. FD_ISSET(client_s[ii], &read_fds) is recv, send function calling

if (FD_ISSET(hservsock, &read_fds))

{

//관찰의 대상은 server socket도 대상이 됩니다.

//기존에 존재하는 클라이언트가 아닌 새로운 클라이언트의 접속요청을 받앗을때에 해당됩니다.

//select target is two groups

//1. server socket

//2. client socket(when multi, loop is needed)

//1 user connected with server

clilen = sizeof(client_addr);

client_fd = accept(hservsock, (struct sockaddr *)&client_addr, &clilen);

if (client_fd == -1)

{

printf("server: accept error\n");

break;

}

client_s[g_num_chat] = client_fd;

g_num_chat++;

printf("1. server: accept ok.cient fd[%d],all user cnt[%d]-------------------------\n",

client_fd, g_num_chat);

printf("1. server: accept ok.cient fd[%d],all user cnt[%d]-------------------------\n",

client_fd, g_num_chat);

printf("1. server: accept ok.cient fd[%d],all user cnt[%d]-------------------------\n",

client_fd, g_num_chat);

/*welcome message*/

printf("2. server: send [welcome message] ok.--------------------------------------\n");

send(client_fd, welcome_msg, strlen(welcome_msg), 0);

if (getdottedipaddr(client_fd, &client_addr) > -1)

printf("3. %d number additional(IP: %s)\n", g_num_chat, inet_ntoa(client_addr.sin_addr));

else

printf("3. %d number additional\n", g_num_chat);

}

/*ABOUT SERVER CONNECTED, g_num_chat수에 대해 RECEIVE 메세지가 있는지 ALL 조사해서,

g_num_chat수만큼 다시 해당메세지를 ALL SENDING.*/

for (ii=0; ii<g_num_chat; ii++)

{

//client_s[ii]에 read_fds의 값이 설정되어 있으면 0이 아닙니다.

if (FD_ISSET(client_s[ii], &read_fds))

{

printf("4. server: recv ok,client_s[%.5d][%d].------------------------------------------\n",

ii+1, client_s[ii]);

if ((nn = recv(client_s[ii], rline, MAXLINE, 0)) <= 0)

{

removeclient(ii); /* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit */

continue;

}

rline[nn] = 0x00;

if (strstr(rline, escapechar) != NULL)

{

removeclient(ii); /* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit *//* abrupt exit */

continue;

}

//according to recv msg, logic execute

if(strstr(rline, "GOOGLE") != NULL) //unique user response

{

rc = pushcall();

if(rc)

{

//ERROR

}

memset(send_calc_msg,0x00,sizeof(send_calc_msg));

strcpy(send_calc_msg, "google pushcall succ!!\n");

send(client_s[ii], send_calc_msg, strlen(send_calc_msg), 0);

}

if(strstr(rline, "help") != NULL) //unique user response

{

memset(tmp,0x00,sizeof(tmp));

strcat(tmp, "1. GOOGLE\n");

strcat(tmp, "2. calc>>\n");

strcat(tmp, "3. msg>>\n");

send(client_s[ii], tmp, strlen(tmp), 0);

}

else if(strstr(rline, "calc>>") != NULL) //all user response

{

memset(send_calc_msg,0x00,sizeof(send_calc_msg));

memset(input,0x00,sizeof(input));

sprintf(input, "%s", strstr(rline, "calc>>") + strlen("calc>>"));

rc = calculation_socket(send_calc_msg);

if(rc)

{

//ERROR

}

for (kk=0; kk<g_num_chat; kk++)

{

printf("5. server: send ok,client_s[%.5d][%d]-------------------------------------------\n", kk+1, client_s[kk]);

if(client_s[kk] == client_s[ii])

{

send(client_s[kk], send_calc_msg, strlen(send_calc_msg), 0);

}

else

{

memset(tmp,0x00,sizeof(tmp));

memcpy(tmp, rline, nn);

strcat(tmp, "other user request & response:");

strcat(tmp, send_calc_msg);

send(client_s[kk], tmp, strlen(tmp), 0);

}

else if(strstr(rline, "msg>>") != NULL) //all user response

{

memset(tmp,0x00,sizeof(tmp));

sprintf(tmp, "%s", strstr(rline, "msg>>") + strlen("msg>>"));

for (kk=0; kk<g_num_chat; kk++)

{

printf("5. server: send ok,client_s[%.5d][%d]-------------------------------------------\n", kk+1, client_s[kk]);

if(client_s[kk] == client_s[ii])

{

send(client_s[kk], tmp, strlen(tmp), 0);

}

else

{

send(client_s[kk], tmp, strlen(tmp), 0);

}

if (getdottedipaddr(client_fd, &client_addr) > -1)

{

printf("6. IP:(%s),message:%s", inet_ntoa(client_addr.sin_addr), rline);

}

else

{

printf("6. message:%s", rline);

}

} /* while */

//The WSACleanup function terminates use of the Winsock 2 DLL (Ws2_32.dll).

rc = WSACleanup();

if(rc == WSANOTINITIALISED)

{

printf(">>error::A successful WSAStartup call must occur before using this function.\n");

}

else if(rc == WSAENETDOWN)

{

printf(">>error::The network subsystem has failed.\n");

}

else if(rc == WSAEINPROGRESS)

{

printf(">>error::A blocking Windows Sockets 1.1 call is in progress, or the service provider is still processing a callback function.\n");

}

closesocket(hservsock);

}

void removeclient(int indx)

{

struct sockaddr_in client_addr;

if (getdottedipaddr(client_s[indx], &client_addr) > -1)

{

printf("\nserver>>removeclient>>1 number expired!!(IP: %s).", inet_ntoa(client_addr.sin_addr));

}

else

{

printf("\nserver>>removeclient>>1 number expired!!.");

}

closesocket(client_s[indx]);

if (indx != g_num_chat-1)

{

client_s[indx] = client_s[g_num_chat-1];

}

g_num_chat--;

printf("\nserver>>removeclient>>now number = %d\n", g_num_chat);

}

int getmax(int k)

{

int max = k;

int r;

for (r=0; r < g_num_chat; r++)

{

if (client_s[r] > max) max = client_s[r];

}

return max;

}

int getdottedipaddr(int sd, struct sockaddr_in *addr)

{

struct sockaddr_in client_addr;

int len, r;

len = sizeof(client_addr);

if ((r = getpeername(sd, (struct sockaddr *)&client_addr, &len)) == 0)

{

*addr = client_addr;

}

return r;

}

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