'분류 전체보기' 카테고리의 글 목록 (70 Page)

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);

}

석수코딩교육