(完整版)Linux網(wǎng)絡編程練習題

1、a.txt 文件內(nèi)容如下: hello world 2、編寫兩個不同的可執(zhí)行程序， 名稱分別為 a 和 b, b 為 a 的子進程。在 a 程序中調(diào)用 open 函數(shù)打開 a.txt 文件。在 b 程序不可以調(diào)用 open或者 fopen，只允許調(diào)用 read 函數(shù)來實現(xiàn)讀 取 a.txt文件。（a 程序中可以使用 fork 與 execve 函數(shù)創(chuàng)建子進程）。 Wlncludo Nincludc -5ys/typc5h tfInclude 4tncluda： int argcb&r 1 j) prlntf ( beginXn*); 七 fd opcn(a.txf , 0_RDONL

2、)打 R 咲方甘打開乂件 if (fd 乂 7”/晰*豁朗旳扯 lUR 決泵nwi 仙區(qū)J! print omar is Ssn f strerrar (errno) return EXI1_FAIL,UKE; piJ.t =他(;門*ork 伺用.蒞內(nèi)存呻剜-丐目已 I 和圍屯 廿(pid 叭/7 擁岸也皿決勢 IKfnili 創(chuàng) C 臥 砂加朗惟巨. prAntf ferk failed Sis n, itrer ror (emno); e-faurn kXlTFAILURE; if (pi/ttWforkjgaW 于各川龜日淖瘍 char s12S; mein5Ct( Sj zcoF(

3、(s); sprintffsj M,千孑訂/馬打幵乂亡曲衛(wèi)呼朗劃廉飾彳端實伽榊 char *arg!；J = h 勺 NULL ; if CBxcv arfiSj NULL) “ -1)杵劉換辻苗 d#肯蟲珊?矗懈曲聽予 prlntf(M xc 匚譏 3 failed： %snH, 3trcrror(crrno); printf(a endn*)| 戶 4 七 uhji a； b.c#irtcludc Jfincluda #lncludd #inclLile in-t main(lnt argj char 2、實現(xiàn)一個 so 庫文件名稱為 libtupper.so ,so 文件中實現(xiàn)一個函數(shù)，

4、 函數(shù)名為 void upper(const char *src, char *desc),調(diào)用 update 后將參數(shù) src 所指向的字符串中所有字符轉(zhuǎn)化為大寫字母， 結(jié)果放入 desc 字符串中。分別用 C 語言編寫一個程序 testl，調(diào)用 libupper.so 中的 upper 函 數(shù)，用 C+語言編寫一個程序 test2，調(diào)用 libupper.so 中的 upper 函數(shù)。 1 實現(xiàn)兩個程序 mysignal、mycontrl , mycontrl 給 mysignal 發(fā)送 SIGINT 信號,控制 mysignal 是否在屏幕打印“ hello”字符串。 int main：

5、(dLint arg? char ) jl* HfPS-hellc printf(*hellon); sleep(l; ro-turrii 0； it |had-c / Ekef讓 當 upferc 霄 EygnMc 対 空tryti哲nMt 10 CtlSfi 11 f V iflt pid = ataiargslj ); * pid 1 killfpid, siGiNT) );.7-iiaCTpisiGiNrt 14 returni 君 15 4 五 _ _ I 2、自己動手實現(xiàn)一個守護進程，當控制臺窗口關閉時還可以在后臺運行。每隔一秒鐘向 my.log 文件中插入一條記錄， 記錄格式如下

6、：yyyy-mm-dd hh:mi:se 記錄內(nèi)容，其中 yyyy 為Itincludc ft include ffinelud* int niaift(irit arc, char args) if (ar 2) /址畢殳秤曇魏破 Pni 誹運國 I return 0; else f int pid = atoi(args 1J J ； i 氓化兀 “ + killfpid, SIGINT);向 II 齣 pi 撿底 5MIMHT 號 returiii 宕； 1 4、 年，mm 為月，dd 為天，hh為小時，mi 為分鐘，se 為秒。 void wr-iel0(cont char rlog)

7、 tDatej str-uct tm evefltTine； ti e St Date );仃胛:V #9 聞 event! j ine - 1 acai tirne&t Date;/Rg!卜寸.匚二曲 rm t、世百： irrt iYear- - eventTiine tm_year + 19&0; irrt iMon - evefltTime-tm mon + 1; w * int IDa/ = event1ime-tm_mday; int iHoui = event! inte- tm_hour; int iMin 二 eventTimt?- int iSc = even

8、tTifle-tm_5ec; char state l&J； sprintf ( ,%&d-K02d-%02d s iear iMon iDay ); char sTjffie16j sprintf(sTime lh%2d:2d:%e2dt iHour, iMin, iSec)j 離呂姑 n,bj百伽百伽2Titnef Log);若嶄式詵瓣丹 FILE *fd = fop4n(nnylog, na+);以型 G 乃圖 7 評 ny.1 口攻件 fpwts(s4 fd);囪 my 職件耳 Zff 配最 f clO3fl(fd) j / 1 i 和 ITlQf 1 3、 PO pi

9、Jj久丘日1 pif - f)； if (pid 6) ) axi4:(EXl：T_SUCCESS); /in i;!ie if (&id m !；et id() 七. s f xzo(B)R 0) 0 piriatf *ir&cv %sn!1, a); 匕丄甘匕 bT?eaJc ; z-&ad ( STDTN FTLEWO r s, si ZFO-F ( S); retura EXIT_SUCCE33; while (1) i.f ( nd( i七 曰# srrlen r 0 meinset : sr 0* sizeof (s ; printf (send faile

10、d %sn,f, strerxor (exrnoi ) / return EXIT_FAILURE; int printf ,!ctiihe43t Called 號“.trrno) i EXIT F益耳LOP-E； licdizc, s z,E：D-f : iddr sitFuqt as-clndF in A4E|T eiEJset 4a且五# size口:E ：呂己三聖 ； a AH, ain_r aiii 1 y = AF_INET1? B ddr. Ai n_port htcan Ipdift. | .: addz. in_3dldjr. a_-addf inct ddx araD 1

11、9 j xnt maLc xnlL argr cha.r *arg C At r TLI uh# uniDtd,h Csya/T ypE 3.2 d yis f 門口匸 port at: si a rga 2 q =il lit!, JOm JTRhiX,. lot nuin(nt arg-j char *args ) setda?i*on( ); /打璉祥 i 殳弟占PEO樸壯花 char buf10& int i = 0j wt) )il4 (1) main5atbuf ? sizcaf (buf ) ) y sprintf ( buf * log ltd t i+); writ

12、elog (buf); / Av * loS# _ 心命紂打_ Server int iut argr char JI If arg _30CRETF 3O_REU3EADDR, Ron. (cnl ss *1J : _ * _ printf (etsuclkapt failed dinstrerror (errno) I ; raturn EX1T_FA丄LURE： w truet s Dck a ddri n ddd. ; 比幻m討白匸蠡且8出上 Qt f aiddr3in_family AF_INET addf. *inL_pSiZ,fe = hlonport; =_J_LL r 工亠；

13、_O.L1_L 丄 L 11 J . 1 I 暫泣匸宇工：n 1 f (bind(st,. (Btr-uat oekaddr *) -dddr r 9tlw -1) printf fbind failed fcsVnJ srerror erinaj ); raturn EXIT FAILURE? (213ten ( str 2 0) = -1 pr n亡亡 J_ i m;亡邑 ii x ailed %sra!|* r st rer.roz: (eTrnoli ; return EXLFAIlURE; J O-HELE S f 1024 ; Ji nt cl j_entr st- = 0; st

14、ru-cit sockaddr i_n client addr; raenset, (iclientadtir. slzeaf，client_ad-l); sock lam t lan 二 BiawDf (cli KIIE addf) f client at - accept Cat, CR 七 iruc七 aockaddr * alien 七_勻4; return EXIT?_FAIWRE； prizitf accept by %sn*t inet_xitoa ；cl ent_addi: mirLddH) ; while fl) merase-(號” 0, slzecf(s); int ra

15、 = iftev (client stsr (B) R 0);int i; for (1 = Oj tlenl; 0) m void (void arg? h i_nt at = * lnt *卜且工寸； ；z-ptum NULL; HAETAn LTRGKI 7 fcriftH p jri.iL 七 lien 七 J else- 改進后代碼 Clie void *recvi3ck*r. (void mg. j.nt at * int 亙工寸7 char s C1C 24: return NULL； meinsex ( s, u, sizeof (s); redSTDIN FILEHO, ol

16、fio 5J, siz&of s); atrJen (=1) f C)； printf recT failed 備 sAmJ strerror(exro) ; break; while(1) int: re Cf sizseof (sj ); reek? put ; a adz1 ”耳二口 adc.E. n a.:i r LJI-T- a ddf - a 1 j if eoanfl-ct nEp tzuflt. DSffkaddx -1 . aiicof IhdlrF I 1) pthx ,? Ck; z u t urik NLIIL ieturn -1j L=C-j3=-t (a,

17、C r 1 XCC ( 3 I j ； nx rc xeev (stj Sj slzsiof (s ? ;| If (re = | p rin . ccinneict failed： n* r atrerrox errnop t , xetuirc. ZX二 H TaZATRE; 丄nt (lut axg, ah &r *args () if (arg DRZ &onz sizeot (on) -1) d printf (seseckopt failed strerror (errno); “turn EXITFAZLURE; struct j ockaddr_in Addr;

18、 (iaddr, 0, sizcof(addx ; addx.sin_fmnily = &F TNFT; addx.minjairc 二 htons (port); addx . sin addr . s adcdx = htonl (IMADDR ANY ); if (bind(st ; return EXIT FAILURE; xc uuxii x r%xxjXMz ) - if (lien (st, 20) = -1) printf(listen failed %3nrtr strerror(errno); return EXITFAILURE; inc client_sr -

19、C; struct sockaddx in client addr; pchrcad_t thrdlr thrd2; while (1) raenset ( cliEn*t_ddr 0. sizeof (clientaddr); socklen_t len = sizeof(client_addr); /accept會陰乘，啟到肓客 Q 端連接過未9 accept:返回client的socket， client_st = accept(str (struct sockaddr )&ulient_addr r &Len); if (client_st = -1) ( 一 pxJL

20、ntf (*eiccept failed %sn* / stxexxcx (exxno); return EXIT_FAILURE; 1 print ( raccep七 by %snn f xnot_n,toa (c 1 ient_aaar 9in_md4匕); pthread_create(fithrdl, N3LLr recvsocket # tclient_st); close(st: retnxrn EXIT SUCCESS; Client 終極版 void old *arg) 31 In七 st = * ( int * ; char a 102; vhila；l t enset is

21、, 0, sieof is): J-ILt JIC = r ec-v ( st r 3 j sxeof (s) F Dj / if (rc 3NO, n* sizcof ；o); send(st客# strlen(DJ; re tu.r n NULL : Int Hjaxfi I Ini. uzgr etui. *a | 3( f artrf F 丄n Adkiz； e&eeicf占dkhr# 7. alaoor4 adklr 1 ? _ 4.ddr Ly AF I ffET ; adrfr -an_pc zt ht-3ns ip-sr t ; s.d= x j - in_addx .

22、 _adkLE .*! t_a dcx (亙工 gs Lil； = bf十幻 I . -J jk E|L V 2_1-| | _=. 1 ；c nTuSrct ；at.r s-triict. 30ckdddr - a.dadE, fllzecif addr -1 E I PElS.t (cojineet failBdl t- Eor IEETID i j ntibim EXIT_FMLURE; ptMrea d_t Thrdl, tMrdli r pthrejadcx-iMtc thrdi sjtrtJL. recvsoiclKrt, 3tl ; ptk.raad *tbk3d2r StTZL

23、L sfirids-fbck-at r ；*.】； ptlLE 日3 d_j OLD I tSlfdl NULL I : J n-tvrzi miZ_OTCCE35，- Server 終極版 struct ps int st; pthreadt thr; poet = atoi(acqs1|)； irX 8t = socket(AF TKETz SOCK SEEAM. C); ire on a 1; if (00tockopt(at, SOL_SOZKETr SOREUSEADDR, &on, si.zoo(on) L) ( printf (aetockopt tailed *i8n9

24、 srrerror (rrno* ); return EXIT_FAILURE; struct 5ockaJdr_ln addx; nenaot(&addrr 2, sizco(addr); addrnin_maily = AF_INET; addr min_port = htons (port;); addr 3in_addr 3_ addr - htcnl(INAEDR ANY); if (bind st:# (struct: sokaddr * ) iaddrr sizeof addn ) -1) pthred_mut*x_t PTHPFAD_MUTFX_TNTTTALT2?in

25、t status = 0; void xrecvsoaket(void arg) 1 struct ps xp = (struct ps int st = ps 七； char 1024 whilo(l) ( momoo 匕(q， 0r olzoof(D); int pthroad_mutcx_lock(&rcu 七 ux); status 0; pthrcad_mutex_unlock(dmutux); (p thr) ; return void 48end8ocket (vol_d Aarg I LGTSGCS, 0r sizeof main(int arg ahr if arg

26、( printf(bind failed stxerror(exrno); return EXIT_F?LILUF.E; _ if (listcnCat, 20) -1) ( print f (listen f ai ld scr); ocklen_t len = sizRof(clientAddx; g 夕 fl - AlMW client_dt = accept (dt, (struct sockaddx A)Sclioncaddx , &len); pthread mutex_lock ( CaiutexJ ; Sf U3+； pthread_mutex_uxilock 4a匸e

27、x); 1 (status 1) I close(clien_3t; contiitue; I i (cli ntst -= -1 I _ printf (accept failed %snr srerrcr errno) ; return ZXTT_FA,TLURH; _ pzintf (*accep by sXn*, inetntcxs (alient_addr . sinaddr); struct pa psi; palcliont_st; psihr thxd2; pthread create(fcthrdl/ NULL, recraocket, &psl; pthread_d

28、etach.(thrdl); pthread_crea*te (&thrd2r NULL夕 sendsocket, &client_st); pthread_detach(thrd2); _ close (st); return EXIT SUCCESS/ Server 和 client 之間進行文件傳輸 丄.SUFFIXES： .c -o 2 3 CCflCC 4 S ERVERSRC Server. c i |lUb. fi CLIENTSRCSclient.cX 7 puh t 8 9 WERWEROB 藥巡託粥 RSRCSee) 18 C LIENTOD3 S 斗 CL

29、IENTS FCS ：- Jt(SEKVfROBJS) ) 16 f(CC) -fl $(CLI6NTEXEC) J(CLIEMTOBS) 17 亠 疤亠眄ok * - 15 ;g .c.o： 陽 5(CC) -Wail -o 理-c 21 22 clean: 23 rm S(SERVEROBJS) 24 rm -T 1(CLIENTOBJS) 2S. - f rnrR* Clie nt.c #lrrelud* #xncluda sirdlib. h ftincluda rpuh.h Int flurt(irtt 僅戶g# har fcar) 卻 ipart; rnturn EXIT_FAIL

30、UR E * pr intFCs send begirvn f ags jj) j i/F (sendwork, dport,. aig;s3) = 1)/|?JK* Si二 prlfltf(n%5 said succcssXn ars(BJ); AIEA Pub.c wirdef hl Wincludc WinSo ttelx WiAcludc Winelude Winclude Wincludc #includ include WtFT dnt endif Wiicludc WLcludc Hpub.hr define BUFSIZE 2621U /256k void get filena

31、me (cont chr filename, ch 廠 *naie)/ F4Jfl： /hoaie/tes t/ab C ixit leci = strlcn( filenarhe); dnt i; tor (i = (len - 1); i = a； i-) ( ( 訐(filpnAmA ji = *) I I (fi1AnAmpi = /) br _ strcpy(name, &filenanei 卜 1J); return; SOCKET ffnWBBMTV/ocket 仃 Jn*windows. IMWIK 代瑪 ifdcf WIN WORD wVersionRcqucsted

32、; WSADATA “m 十 z; mt err; wVersionRequested HAKWORD( (1, 1); cm = WSAStactupCVorsionRoquostcd, ftwcaData); if (err != 0) ( roturn -lj if (LOBYTE(waDota.wVcraion) I 1 | HIBYTE(wsaDota.wVersion) ! 1) MSACleanupO; return -lj endf roturn 0j 64 SOCKET 65 66 67 68 69 70 71 72 73 st char -hoslndfie, inf p。

33、廠 t）連惶邦 5 定出主悅和滇口號 if (init_socket() 1) return 0; 75 76 77 78 /y 80 81 82 83 84 85 SOCKET st = socket(AFINET, SOCKSTREAM, 0)；/立 TCP ocset if (st =x 0) raturn 6; struct sockaddr in addr; mvrcet(&addr# 0, sizo( addr); addr. sin_f wily = AF_1NET; addr.sin_nfrt = htons(port);/ add 廠.sinaddr. saddr -

34、 inetMaddr(hostnafBe) j/ZMfe1 if (connect(st, (struct sockaddr ) &addr sizeof(addr) = -1) prlntf(connect to %s:%d failed %sn , hostname, port, strerror(errno); return )else return st;/5. gBocketlBiin socketMcrent(int port )/Tt hitn 2.erverWiocket IT (init socket() - -1) reum 0; SOCKtT 5t socket(

35、A_INtT, SOCKSIKt/VI, 0) )；/S ICP socket (、Q - 0) return 0; /WI2socket力 ； Wlfdcf WIN e char on = 0: L*f (wt Ktrcrror(errno); return 0; 1) struct xik&( (Jd 廠_in addr noncot (&uddrf 0, tlxcof ( jddr); addr.sin_family AF_INET; f(port); addrsl.n_add 廠s addr = hrcxil(INACOR ANr); if (bmd(st (struc

36、t sockaddr *) &addr* sxzeof (oddr) - l)/scrver-M5ocket prints(wbind failed %cnM, ctrorror(orrno); return 0; prlnf(Hlisten failed %sn*, strerror(errno); return 0; prlntfCliiteci juccejn*f port); re-turn ct; , ,8和命加 jg 回 grvars“ovjj 辻 77 struct soc.kaJdrin client_ddr; ifdef WIN int len 0; ncd irvt

37、 len = 1 len - sirco-f(clicnt_oddr); ncmset(&clipnt_addr, 0, sizeof(client_addr); SOCKET cliefit_st = dccepL( (llslen_st, (struct sockaddr ) &cllentaddr, &lcn);/accaptfaS 8511 liotdftlcarvQrga if (client_st = -1) print(wAcrppt fai lpd 肚n* trerror(prmo); return 0; )else printf(Maccept by

38、%sn, inet_ntoaclientaddr.sinaddr); re-turn cliGntst; rTt5Et char *filendree)/, ft Qtne 拯曲 HMMBpoman口彎 i* (st e)/ fc 加直回 return 0; FILE 卄 d afopn(Filcnarte/ if (fd M rb ) fi 1” cEtt 件 =MJI i ffltivsm printf (open Xs failed %cn filcno-no, strcrf*or(cnrno); return 0; char 4but = fnalJoc(tL.Zt); ； /ffit

39、i- i zOE. ncmct(buf, 0, DUrS12C)j gotf i lonano(f i lonanp, Jfth /hooo/tact/abr. txt.txt size t rc = send(st, buf, strln(buf), 0);/HMF 1MWfR (rc - e) if (rc 0) ) printf(wsend failed %snj trrror(errno); else printf(socket disconnectnM); else nemset(buf, 0, BUf-bIZt); if (recv(st, buf, BUrSIZE, 0) ) 0

40、) )/婆攻杰廣姬伯夏 if (rc 9) while (1) nemset(buf, 0, BUPSTZE); rc x frasd(buf, 1, BUFSIZC； fd);/“俸 住如後 W W 畀 Eak if (rc V 0) printfCfread failed XsnH, strarror(errno); broakj QISQ ( rc二 qand(毗，bufz rr? 0);烤 0 立件*栽說澈湊51；北。寸古匹予(2 戶弋 1|KCr ；r (rc v 0) )iW 友代 Tiebreak IT (rc a) printf ( H send failed %二門爲 ctr

41、error( (Grmo); Ql$a prln-fcf(*socket di5ccnncctnH); break; ) SOCKCT 丄- 5x.kct_crele(port) j / /：| . yktr Gpoi -WStA 口： if (liton.ct*= 0)対椅品弄 3,敖八訛真處 血話 60 return 0; SOCKET st socket_occept(listenM3t) ;/*WRHclientl9iiSe socketccept3ttSEJclicrt(J5Ocket if (st = G) return ; char *but = malloc(BUFSIZE)

42、;/n?rTmK9ix FILE fd - NULL; neaset(buf, 0, BUFSIZE)； gix_t rc - recv(st, buf, BUFSIZE, 0); if (rc = 0) ( if (rc trcpy(buf, OK0); -buf# ctrlon(huf), ft); 產(chǎn)負測農(nóng)待 if (rc = 0) ) printf (send foiled XsVn*5 , atrerror(errno); else prntfsoukEt disconnectn ) j ( ( nemseiCbuf 0, BUrSIZE); re = recv(st, but, B

43、UFSIZE, 0);/IHt3SficlientfiWl， i* (re “ e)/*tfRclientiff. f文伸*RMS*fifllnbreo if (rc printf (Mceckot diccornortn,); break; also M“( (bu 化 1, rc,佗)；俺從 Jiang(腋労的內(nèi) UE 入袤律 3EEE(fd力關祐呼沖 Tree(buf); ffitdef WIN ; rrgdlitc J rncjlefiilrwio ttaiUt 也 Epybx flEj Kivp-E 3 K * * server, cP 810 4l HeLud Ulricliid

44、cstdlib, h ifincludQ ,ipub.hBl 11 17 irr+ nain(int arg char- 14 15 1盼 If 2 也 2兒如援洼円尹斬耐(啕靜謝出 ( prin+f cagtfit pnrl- n* ) * return tXJl FAILURfc J 19 ?A 22 j j w Lnt iport = a+oiC a res 1J )* ；./1- s- 4- asw *i-x : f n 護皿 s 汁叢亡邊：Jn 號上,廣 if (iport = fl) ( pin-tf (port ltd is i nvaldr l1j, ip-cr); retur

45、n FXIT_F4!IURF; 25 27 ? 36 p 嚴工任事尸口若“ i ho ginnil! )i; i-f (nacv_wDrk ( iport = 1)/ /ir erisQcl.：tfiji-：?=FpZ f 丄 i 呂 t 苔 rr 拮我*自 11 ：erriS 若?b 斗 prlntf(Mrecv successkn); 舌 lx i prinif(nr*v Failnn); rttum tXl_SlK.LtiS； Myqq WOE ANSI CODE 3Q PARSE.PARTIM THREADS-YC5 ON J：NaQ, PROCSRCS) INCUUOE(ORAFLA

46、CSl) XMCLUP$(WAFLAGS2) )CPOOL-YCS rOQE-ANS rm f $06JS) rm f $D6SRCS) rm -f core* const char F F7 7B B9 9101011111212131314141515161617171919M M “21212222232324242525262627272828 溝3333class 呼 orxle LJ n/OT4cn(CQnt chr wOySQL) )i void sqldisconnoctC); cH8t char alJser const char Pi&svtord, const 廠

47、 KYORML_ / G*i myo4k.pc K rnyortcldh Na e Author Version Copyright Desription include Hincludo include tring Ninelu*dd yoraelErrpr$tring512; = 0; tE*rprSixc 二(方 ErrorStrin%)： st b void yoracle: zsql.initO j I SQL CODE 0； ra_pContxt NULL; EXEC SQL ENABLE THREADS; EXEC SQL CONTEXT ALLOCATE :injpContex

48、t；/RjContext FXFC SQ1 CONTEXT USE :m pt chi.ir S4JLCOOE = d; sUser = User; = Paword; SrvQL = DBNainc; EXEC SQL CONNECT ssUser lOfNTIFIEO BY ssPassword USING :sServer;/HMoracle if (9QLC0DE ! 0) sql_error; 疔 tQMblUl return -1; ( rQtvrn 0; ryorotle; 5ql _open(con5t char DySQl/mltSELECTiSo) iat r5ult 0; fXCC SQt MJH DfClARf SEO