2023年上海大学操作系统实验报告合集

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#include#include#include#includeconstIongn=5;structpcbtype®஺஻)ᑴᙽ᪀(longid,priority,runtime,tota1time;®charstatus>//RW,F->⃩012034t}PCB[n+l];

7longlink[n+1];//6⊤᪀010ngRUN,HEAD,TAIL;஻⌱9:;®longChooseAlgo()(Uchars[l28];printf(HPleasetypetheAlgorithm(Priority\\RoundRobin)V");gets(s);if(s[0]=='P'||s[O]=='p')஺return1;return0;0)//<=ᓄ஺voidinit()°{஺I஺ngi;ofor(i=1;i<=n;i++)°(PCB[i].id=i;PCB[i].priority=rand()%4+l;®PCB[i].runtime=0;PCB[i].totaltime=rand()%8+1;oPCB[i].status?'W';))

8஻@ABC•voidshowit()(longi;

9");஺printf("%-25s","ID");•for(i=l;i<=n;i++)printf("%4ld",PCB[i].id);printf("

10%-25s","PRIORIT///TURNTIME")W»for(i=l;i<=n;i++)printf("%4Id",PCB[i].priority);printf("

11%-25s","CPUTIME");•for(i=1;i<=n;i++)printf("%4Id",PCB[i].runtime);printf("

12%-25s","ALLTIME");•for(i=l;i<=n;i++)printf("%4ld",PCB[i].tota1time);•printf("

13%-25s","STATUS");for(i=1;i<=n;i++)printf("%4c",PCB[i].status);°printf(

14—————————————————————————————————————————————————————

15")W஺if(RUN!=-1)printf("RUNNIN&PROCESSV%ld

16",RUN);elseprintf("RUNNINGPROCESSVNULLXn");printf("WAITINGQUEUE:");•for(i=HEAD;i!=-1;i=1ink[i])printf("%Id",i);

17orintf("

18

19");P)//Eᐜᦪ:;voidmain_priority()°(Iongi,j,k;1ongsort[n+l];oinit();஺//IJ126®for(i=1;i<=n;i++)°{sort[i]=iW}for(i=l;i<=n;i++)஺஻᪷MEᐜᦪfiEN(°for(j=n;j>i;j--)஺{®if(PCB[sort[j]].priori+y>PCB[sort[j-1]J.priority)஺(k=sort[j];sort[j]=sor+[j-1];sort[j-1]=k;)0)0)HEAD?sort[1];

20®for(i=1;i

21)e1se(•if(HEAD!=-1&&PCB[RUN].priorityPCB[RUN].priority)k=link[k];஺if(k==TAIL)(-link[k]=RUN;஺//]ᐭ6_`a»TAIL=RUN;஺link[RUN]=-1;஺஺°°RUN=HEAD;oHEAD=link[HEAD];PCB[RUN],status='R';)•else(•link[RUN]=link[k];஻]ᐭ6X»Iink[k]=RUN;஺RUN=HEADW஺஻6✌b=⃩

22஺HEAD=1ink[HEAD];஺PCB[RUN].status='R';°)0)}0)showit();)//cd:;ovoidmain__round_robinQ°{஺1ongi;஺init();஺஻IJ126oHEAD=lWfor(i=1;i

23»PCB[RUN].statusV'RHEAD=link[HEAD];//⃩✌while(RUN!=-1)(஺showit();•PCB[RUN].totaItime—;஺PCB[RUN].runtime++;•if(PCB[RUN].totaltime==0)//⃩34(஺PCB[RUN].status='F஺஺RUN=HEAD;•if(HEAD!=-l).HEAD=link[HEAD];஺PCB[RUN].status='R';0}•else(»if(HEAD!=-1&&PCB[RUN].runtime%PCB[RUN].priority==0)஻cdefᑮ(PCB[RUN].status='W';஻]ᐭ6_•link[TAIL]=RUN;dink[RUN]=-l;•TAIL=RUN;

24஺RUN?HEAD;஻6✌b=⃩oHEAD=link[HEAD];PCB[RUN].status='R)0)஺hUshowit();6)஻jkᦪintmain஺஺lIongalgo;஺srand(time(NULL));®algo=ChooseAIgo();oif(a1go==1)(஺main_priority();//Eᐜᦪ;஺heIse(main_round_robin஺;//nᩎcd;)printf("SYSTEMFINISHEb

25");஺return0;0)
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28for(inti=0;iProcesses[curProcess].Need[i]){®«®Lega1=faIseIgbreak;

29°|for(inti=0;iRes[i]){஺oLega1=fa1se;஺break;0)஺}inttmp[15];for(inti=0;i

304sFindfa1se;wintcurRe1=-1;ofor(inti=0;itmp[i]){gsIsFF=fa1se;33oobreak;6)O000}e®IsFind=IsFFI®if(IsFind==true){ooooocurRel=i;ooooobreak;008}0)°}if(IsFind){for(inti=O;i

31}whi1e(!IstmpEnd()&&IsFind==true);for(inti=O;i>Res[i];for(inti=0;i>Processesfi].Had[j]>>Processes[i].Max[j];))intoption=-1;cin»optionIif(option==0){do)

3200for(inti0;ifor(inti=0;i>Req[i];}ooLega1=fa1se;oBanker();®if(Lega1){oProcesses[curProcess].IsEnd=true;sfor(inti=O;i

333ஹPQ⃩STINPUTUOPTION=0CLAIMOFPROCESS1IS:123-1-10CLAIMOFPROCESS2ISU2311-20CLAIMOFPROCESS3ISU125-1-20MAXCLAIMOFPROCESS1IS:6MAXCLAIMOFPROCESS2ISU7MAXCLAIMOFPROCESS3IS:8THESYSTEMALLOCTIONPROCESSISASFOLLOWS:PROCESSCLAIMALLOCATIONREMAINDER(1)1஺11஺9RESOURCEISALLOCATEDTOPROCESS1(2)227஺2஺RESOURCEISALLOCATEDTOPROCESS2(3>3116RESOURCEISALLOCATEDTOPROCESS3(4)12஺34RESOURCEISALLOCATEDTOPROCESS1(5)2஺3஺2஺4IFALL0CATED,DEADLOCKMAYOCCUR(6)<>1o24஺3஺THEREMAINDERISLESSTHANPROCESS2CLAIMS(7)3஺010஺0஺PROCESS3HASFINISHED,RETURNITSRESOURSETHEWHOLEWORKISCOMPLETED

34ૄ*******************************************VWXYZ[\]^_`ab
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36#inelude#include#inelude#inc1udeusingnamespacestd;intadress[32];஻ᐰᦪᙢᙬintp;஻ᐰpᐳᨵᙢᙬvoidinit(){஻<=ᓄkᦪ0intt;°srand(time(0));஻ᢣNᑡp=12+rand()%32;cout<<”ᙢᙬ¢ᦪP="«p«endl;ocout«”ḄᙢᙬNᑡ

37”ofor(inti=0j=0;i

38");)cout<

39)voidOPT(intn){//FIFO:;,nMḄ¦ointe,q?p,m=n-1;intflag;ointflag1;intqueye=0;intleafIink[32];memset(leaflink,0,sizeof(leaflink));for(intx=0;x

40“);o஺break;s)}஺if(flag??OKintk=0;for(intj=O;j

41k++;1eaf1ink[m]=adress[e];if(e>=mXqueye++;)if(f1ag==1){inttemp[10]={0};for(inti=0;i<=m;i++){for(inta=e+l;atemp[i]){min=temp[i];index?i;})int1=1eaflink[index];leaflink[index]=1eaflink[0];

42leaflink[O]=l;}for(intj=O;j

43e=x;®®for(i=0;i

44",x,i,x,adress[x]);ebreak;d0}if(f1ag==0){intk=0;஺஺for(intj=O;j

45°°flagl++;}஺leaflink[3]=adress[e];஺printf(“°±¨©a,ᦋleaflink[%d]=%d

46H,mjeaf1ink[3]);}o°for(intj=0;j

47LRU(i);cout<5leaflink[1]=3leaflink[2]=5leaflink[31=9leaflink[1]=5leaflink[2]=9leaflink[31=lleaflinkCl]=9leaflinkt21=1leaflink[3]=8C=5,Irutl]=adress[5]=9,£lag=1°±¨©a0ᦋleaflink13J=9LeaflinkC0]=5leaflinktlJ=1leaflinkC21=8leaflink[3]»9=6,lru[0]=adress[6]=5lag=1Á±¨©a0ᦋleaflink[3௃=5eaflink[0]=lleaflinkLI]=8leaflink[23=9leaflinkL3]=5eaflink[0]=8leaflink[1]=9leaflink12J=5leaflink[3J=2=8,Hl]=adress[8J=9,flag=1Á±¨©a0ᦋleaflink[3]=9

48°±¨©a0ᦋIea£link[3]=5leaflink[0]=lleaflinktl]=8leaflinkC2]=9leaflink[33=5leaflink[0]=8leaflink[13=9leaflinkC2]=5leaflink[33=2ᨵ¨©X=8,Irull]=adress[8]=9,flag=1°±¨©a,ᦋleaflink13]=9leaflink[0]=8leaflinktl]=5leaflink£2]=2leaflink[3]=9ᨵ¨©X=9,lru[2]=adress[9]=2,flag=1°±¨©a0ᦋleaflink஺]=2leaflink[0]=8leaflinktl3=5leaflinkC2]=9leaflink[33=2ᨵ¨©X=10,Irutl]=adressL10]=5lag=1°±¨©a0ᦋleaflink131=5leaflink[0]=8leaflink[1J=9lea£link[2]=2leaflinkC3]=5leaflink[0]=9leaflinkCl]=2leaflink[2]=5leaflink[33=1leaflink[0]=2leaflink[l]=5leaflinkt2]=lleaflink[3]=8leaflink[0]=5leaflinkCl3=1leaflink[2]=8leaflink[3]=6ᨵ¨©X=14,lru[2]=adress[14J=8,flag=1°±¨©a0ᦋleaflink13]=8leaflink[0]=5leaflinkCl3=1leaflink[2]=6leaflink[3]=8°ᣚÄÅÆ?,M=4eLRUḄ¬X᳛®40zleaflink[0]=3leaflink[13=5leaflink[2]=1leaflinkC3]=9lea£link[4]=0ᨵ¨©X=6,Irutl]=adress[6]=50Çag=1°±¨©a0ᦋleaflink14J=5leaflink[0]=3leaflinktl]=1leaflinkC2J=9leaflink[3]=5lea£link[4]=0leaflink[0]=lleaflinkCl]=9leaflink[2]=5leaflink[3]=0lea£linkt4]=2ᨵ¨©X=8,Iru[1]=adress[8]=90Çag=1°±¨©a0ᦋleaflink14J=9leaflink[0]=lleaflinktl]=5leaflink[2]=0leaflink[3]=9leaflinkC4]=0leaflink[0]=5leaflinkCl]=0leaflink[2]=9leaflink[3]=0leaflinkC4]=2ᨵ¨©X=10,lru[0]=adress[10]=5,flag=1°±¨©a0ᦋleaflinkভ=5leaflink[0]=0leaflink[l]=9leaflink[2]=0leaflinkt3]=5leaflink[4]=2leaflink[0]=9leaflinktl]=0leaflink[2]=5leaflinkC3]=2leaflinkt4]=lleaflink[0]=0leaflinkLl]=5leaflink[2]=2leaflink[3]=1leaflink[43=8leaflink=5leaflinkCl1=2leaflink[2leaflink[33=8leaflinkL4]=6ᨵ¨©X=14,li*ii[3]=adress[14]=8,flag=1°±¨©a0ᦋleaflink141=8leaflink[0]=5leaflinkCl]=2leaflink[2]=1leaflink[3]=8leaflink[4]=0°⚶ᣚÉÊJ஺,M=5eLRUḄ¬X᳛®33.3333Zᨬ¸¹º:

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52structMFD{intuser;UFDp[5];}mfd[10];intmain(){intx,n=10f1agl=ljlag2=1,flag3=1;zif(flaglXfor(inti=0;i<10;i++){ufd[i].fname=i;intt=100+rand()%900;ufd[i].1en=t;for(intj=O;j<3;j++)ufd[i].procode[j]=rand()%2;)srand((unsigned)time(NULL));boolf[10];for(inti=0;i<10;i++Xmfd[i].user=i;memset(f,0,sizeoff);for(intj=0;j<5;j++Xintt;do

53t=rand()%10;while(f[t]);mfd[i].p[j]=ufd[t];)))while(n--&&fIag2){cout«"inputuserD"<>x;if(x=10){cout<

54case1:if(flag3){cout<<"¶ᐭÏ⌕ÑÒḄᦻÍḄÓ:H«endl;cin»mfd[x].p[O].fname;cout<<“¶ᐭÏ⌕ÑÒḄᦻÍḄÔ"«endl;cin>>mfd[x].p[O]Jen;cout<<“¶ᐭÏ⌕ÑÒḄᦻÍḄᩗ▲:"<>mfd[x].p[index].fname;cout¶ᐭÏ⌕ÑÒḄᦻÍḄÔ:“<

55for(intj=0;j<5©j++)cout<>t;for(inti=0;i<5;i++){if(mfd[x].p[i].fname==tXindex=i;mfd[x].p[i].fname=0;mfd[x].p[i].len=OOO;memset(mfd[x].p[i].procode,0,sizeof(mfd[x].p[i].procode));))for(intj=0;j<5;j++)cout«mfd[x].p[j].fname<<""«mfd[x].p[j].1en«""<

56break;case3:cout«"¶ᐭ⌕ᡭbḄᦻÍD“<>fi1e;for(inti=0;i<5;i++){if(mfd[x].p[i].fname==fi1e){if(mfd[x].p[i],procode[2]==0)cout<<"ÏÚᨵᩗ▲"«endl;elsecout«"ÛÜᡭb"<

57break;case5:flag=O;flag1=0;break;case6Dcout<<“¶ᐭ⌕ÝḄᦻÍ:ndl;intfilei;cin»fiIe1;for(inti=0;i<5;i++){if(mfd[x].p[i].fname==filelXif(mfd[x].p[i].procode[1]==0)cout«“ÏÚᨵᩗ▲*endl;elsecout<<“ÛÜÝ"<

58if(mfd[x].p[i].fname==file2Xif(mfd[x].p[i].procode[0]==0)cout<<"ÏÚᨵᩗ▲0

59

60inputthecommandàᐭ⌕ÝḄᦻáâÚᨵᩗ▲inputthecommandàᐭ⌕ÝḄᦻáãÜÝinputthecommandᘤå⌕ᑏḄᦻáæÚᨵᩗ▲inputthecommandçå⌕ᑏḄᦻáèÜᑏinputthecommand459910017918110014110063920101100111goodbye^
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61
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62S3ëelnetces203.shu.edu.cn-□>[stud06701ocalhoststud067]$cd/etc[stud067(?localhostetc]$Is-1Imoreìᵨ2108-i*w-rr1rootroot152282003-01-25a2ps.cfg-rw-i*r-1rootroot25622003-01-25a2ps-site.cfg-rw-r-r-1rootroot462008-03-20adjtimedrwxr-xr-x2rootroot40962008-03-20aep-rw-r-T-—2rootroot6882003-02-04aep.conf-r1rootroot7032003-02-04aeplog.confdrwxr-xr-x4rootroot40962008-03-20alchemist-rw-i*-r-1rootroot13432003-02-25aliases—-j*---—---1smmspsnmsp122883ᨴ20719aliases.dbdrwxr-xr-x2rootroot40962008-03-20alternatiues-r1rootroot3172003-01-25anacrontab1*W1rootroot12003-01-25at.deny—rw-i*-i*-1rootroot2122003-01-28auto.master---r1rootroot5752003-01-28auto.nisc—rw-rr1rootroot14972002-08-30bashreIrwxrwxrwx1rootroot212008-03-20bg5ps.conf->bg5ps.conf.zh_TW.Big5Irwxrwxvwx1rootroot232008-03-20b^Sps.conf.zh_CN->bg5Ps.conf.zh_CN.GB2312-rw-i*r1rootroot3922003-01-25bg5Ps.conf.zh_CN.GB2312Irwxrwxrwx1rootroot212008-03-20bgSps.conf.zh_TW->bg5Ps.conf.zh_TW.Big5îïðñò:I1Telnetces203.shu.edu.cn_□XCstud067(?localhoststud0671$cd/bin▲(stud0670localhostbin]$Is-1'moreìᵨ4848-rwxr-xi*-x1rootroot26442003-02-25arch-rwxi*-xi*-x1rootroot924442003-02-06ash-rwxr-xr-x1rootroot4929682003-02-06ash.staticIrwxrwxrwx1rootroot42008-03-20awk->gavik-i*wxi*-xi*-x1rootroot108482003-02-19basename-rwxi*-xi-x1rootroot6260282003-02-11bashIrwxrwxrwx1rootroot42008-03-20bash2->bashIrwxrwxrwx1rootroot32008-03-20bsh->ash-rwxr-xi-x1rootroot143642003-02-19cat-rwxr-xr-x1rootroot180762003-02-19chgrp-rwxi*-xi*-x1rootroot180762003-02-19chnod-rwxr-xr-x1rootroot197722003-02-19chown-i*wxr-xi*-x1rootroot477322003-02-19cp-rwxr-xi*-x1rootroot519562003-02-15cpioIrwxrwxrwx1rootroot42008-03-20esh->tesh-rwxr-xr-x1rootroot198682003-02-19cut-rwxr-xi*-x1rootroot386202003-02-19date-rwxi*-xr-x1rootroot307722003-02-19dd-rwxr-xi*-x1rootroot285962003-02-19df-rwxi*-xi*-x1rootroot40642003-02-25dmesgIrwxrwxrwx1rootroot82008-03-20dnsdomainname->hostname-rwxr-xr-x1rootroot25162003-03-13doexecîïðñò▼

63S3_□X[stud067(?localhoststud06?!$cd/hone[stud067(?localhosthome]$Is-1imoreìᵨ46010drwx3IxnIxn409601017:42Ixn1drwx3stud014stud014409621016:04stu014drwx16stud001stud001819222616:33stud001drwxrwxrwx5stud002stud002409621619:19stud002drwx20stud003stud003409612616:43stud003drwx5stud004stud00440962608:41stud004drwxr-x——x3stud005stud005409622617:51stud005drwxrwxrwx4stud006stud006409622611:30stud006drwx9stud007stud007409622412:21stud007drwx10stud008stud008409621009:06stud008drwx4stud009stud009409622520:28stud009drwx7stud010stud010409621619:21stud010drwx------5stud011studOll409621013:10studBlldrwx10stud012stud012409622518:54stud012drwxrwxrwx8stud013stud013409622518:54stud013drwx4stud014stud014409631012:57stud014drwx6stud015stud01540963215:10stud015drwx3stud016stud01640962210:28stud016drwx10stud017stud017409622712:2?stud017drwx3stud018stud018409621010:46stud018drwx6stud019stud019409621712:34stud0191drwx4stud020stud02040963013:34stud020^ᩞᙽ:W"#.3.ᵨᑖ&'()ᦻᦻ஺*+Is-iIᡠ-Ḅinodeஹ.ᦪ0123Ḅ4&஺ó[stud067(?localhoststud067]$cat>£1ADAisXuLijian.Cstud067(?localhoststud06?!$In£1£2[stud0670localhoststud0671$In-sflf3[stud067(?localhoststud06?!$cat£2ADAisXuLijian.[stud067(?localhoststud067]$catf3ADAisXuLijian.[stud067(?localhoststud067]§rmfl(stud067@localhoststud067!$catf2ADAisXuLijian.[stud067(?localhoststud067]$catf3catf3Úᨵô¢ᦻáᡈö[stud067(?localhoststud06?!$cat>£1ADAisXuLijian.Cstud067(?localhoststud067]$rm£2Cstud067(?localhoststud067]$cat£3ADAisXuLijian.[stud067(?localhoststud067]$♦5ὃ⚪"'()ᦻ'(ᦻᨵ9:4&;<")=ᢣ*+?@⁚BᩭDEḄ=஺ᙠLinuxGHIJᦻKᢣᔣMN?@⁚BOPᙠḄ஺NQRS=TO)=஺)=ḄUᵨOᐕWNJᦻXᨵIJᨵᦔ⌶[K,R᪵ᵨᡝT_`'()=ᑮb⌕ᦻH`■e“gᑤ”Ḅjk஺ᐸmn᝞pᡠqHᵫstuvḄ?@⁚BᨵNJ`pḄ=஺wᑤ◀NJ=yz

64{|?@⁚B}~ᐸḄ=HwᨵvᨬNJ=ᑤ◀HᦻḄᦪᙽḄ=஺TO,ᦻᑤ◀.)=ttuḄ--S=H==஺ᦻᨵBsWindowsḄᣩ஺pOᱯᦻḄNS஺ᙠ=GHᦻpONJᦻᦻHᐸGᒹḄᨵNᦻḄ¡¢£¤஺᝞p¥¦ᡠ-"touchf1§'NJflḄᦻInflf2§¨NJf2Ḅ)=1n-sflf3§'NJf3Ḅ=©ªᎷ᝞ᑤ◀f3,¬flஹf2{|®Ꮇ᝞ᑤ◀f2,¬flஹf3{|HᎷ᝞ᑤ◀fl,¯:ᵫsf2uᵨfl,ᡠ`yz{|f2⁚BḄHcat§'Ḅᦻ°ᯠPᙠ;³O©ªf3ᵫsO=H´µf3ᜫᦔ஺Ꮇ᝞ᑤ◀flஹf2,¯:cat§'Ḅᦻᑤ◀஺4.·¸UnixᡈLinuxºUᦻ£¤i⁚BḄᭆ¼஺½¾01¿ᢣÀᦻḄinode£¤஺ÁÂpþ8ḄᑁÅÆᐭp3.cH½È᡻E஺[stud0670localhoststud0671$gcc-op3.op3.c.[stud067(?localhoststud06?!$.Zp3.oflFilesfll>Ondeuice8S-inodenumber=11618432)Type0100000Permission006643>0uerid568Groupid5684>Nunberofhardlinks5>Size176>LastaccessMonMar21835482009LastmodifyinodeMonMar218354820097>Datablocks4096.8[stud067(?localhoststud0671$5.ÊᩭNJËᨵÌḄ¦஺Íᦋ᱄D¾§'ÐD¾Ḅ¾ÑHᵨÒ-¾ÑÓஹᦪÓᙢᙬḄÖH×ÐD¾ØÙ᱄D¾ḄᡠᨵÚÛ஺Êᵨ᱄D¾§'ÐD¾HÐD¾Üᵨᐸ¾ÑḄÖDNÝÞ×᡻Eᐸ¾Ñª,¾ÑÓßàḄáᓄ஺ÁÂpþ10Ò-¾ÑஹᦪÓᙢᙬḄ¾ÑḄᑁÅÆᐭP4.cஹp5.cH½È᡻E஺

65Cstud067(?localhoststud067]$gcc-op4.op4.c[stud067@localhoststud067]$.Zp4.oetext80483fbedata8049548endx6_icricp___11__d___JIOZ*mA6.½ᑏNJäåᦻḄ¾Ñ஺æÀ:A.`wçᡭéNJÛᦻᦻB.`wçᡭéNJÛᦻᦻC.`wçᡭéḄᦻᦻD.ÁêJÛᦻᑁÅ·ᑴᑮḄᦻE.ÁḄᦻᦋᢣÀḄìឋF.Ò-ḄᦻÁÂpþ11ḄᑁÅÆᐭP6.cH½È᡻E஺pqᙠ¦GzîᨵÂpḄᭆ¼HÂpïḄzðñḄ,òó}ôõöp÷øÚᧇ஺¬sLinuxGᦻḄ)ᳮóûOüýH¬s¦ᑁÅᳮËDNÝNÝ,UnixḄᑁ᪶᪀ḄOÿ
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66#incIude#include#include#include#defineTIME_STRING_LEN50char*time2String(time_ttm,char*buf){structtm*local;local=loca1time(&tm);strftime(buf,TIME_STRING_LEN,"%c"JocaI);returnbuf}intShowFilelnfo(char*fi1e){structstatbufchartimeBuf[TIME_STRING_LEN];if(Istat(file,&buf)){perror(nIstat()error")return1;)printf("

67File%s

68",fiIe);printf("l)Ondevice(major/minor):%d%dJnodenumber:%ld

69”major(buf.st_dev),minor(buf.st_dev),buf.st_ino);printf("2)Type:%07o\tPermission:%05o

70",buf.st_mode&S_IFMT,buf.st_mode&(SùFMT));printf(n3)0verid%d\tGroupid:%d\t

714)Numberofhardlinks%d

72",

73buf.st_uid,buf.st_gid,buf.st_nlink);printf("5)Size:%1d\t

746)Lastaccess:%s",buf.st_size,time2String(buf.st_atime,timeBuf))printf("

75Lastmodifyinode%s

76

77"time2String(buf.st_atime,tim/eBuf));printf(H7)Datablocks:%d,%d\t

78",buf.st_blksize,buf.st_blocks);return0;)intmain(intargc,char*argv[]){inti,ret;for(i=1;il)printf(H

79");)returnret;)//p4.c#inc1udeexternintetext,edataend;zmain()(printf("etext:%6x\tedata%6x\tend:%6

80",&etext,&edata,&end);஻P5.c

81#inc1ude#include#include#inc1ude#include#defineSHW_ADR(ID,I)printf("Theid%s\tisatadr:%8x

82H;externintetext,edata,endchar*cptr="He1IoWorld.

83”charbuffer1[25];main(){voidshowit(char*);jnti=0printf("Adretext%8x\tAdredata:%8xAdrend%8x

84

85n,&etext,&edata,&end);SHW_ADR(Hmain"main)zSHW_ADR("showit",showit);SHW_ADR("cptr",cptr);SHW_ADR("bufferl"bufferl)zSHW_ADR(Mi",i);strcpy(bufferl/'Ademonstration

86")write(l,bufferl,str1en(buffer1)+1)for(;i

87{char*buffer2;SHW_ADR("buffer2",buffeফif((buffer2=(char*)ma1Ioc((unsigned)(strlen(p)+l)))!=NULL){strcpy(buffer2,p);printf(M%s",buffer2);free(buffer2))else{printf("Allocationerror.

88");exit(1);)}//p6.c#inc1ude#includeintmain(intargc,char*argv[]){chars[1024];FILE*fp;if((fp=fopen(argv[1],"r"))!=(FILE*)0){while((fgets(s,1024,fp))!=(char*)0)puts(s);)else{fprintf(stderr,"fileopenerror.

89");exit(l);

90)exit(0);}#$%&'()*+,-./
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101char**arg=NULL
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104printf(^commandistoolong£i

105M)
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106pid
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i

107M)
return
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108M)qreturn

109if(hou==out_redirect)°)==0)

110M)
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111M,arg[0]);exit(0);}execvp(arg[0],arg);exit(0);}

112breakcase1if(pid==0){if(!(find_command(arg[0])))

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114u)return}elseif(pidZ==0)£if(?(find_command(arg[0])))

115M)if(?(find_command(argnext[0J)))

116)breakdefault:break}if(background==1){printf(°[processidzd]

117M,pid)return}if(uaitpid(pid,&status,0)==-1)printf(MwaitforchiIdprocesserror

118M)}inffind_command(char*command)

119M)while((dirp=readdir(dp))!=NULL)d_name,command)==0)

120_`ablmᦻoஹpᜓஹrsᘤஹuvḄwᳮ஺_`abyz{|}~Ḅ_`ᓄᵨᡝḄC\zuᨵᦔḄwᳮ஺2.abpᙽᓄஹ᪗ᓄZ᝞h¡¢ᙢ¤¥ᙽ¦§v¨Ḅkᙽᓄஹ᪗ᓄZ©}~Ḅᐹ«¬®¯°Cabz᜜²ᩎb´ḄCµf¶◤¸〉zḄᙽº〉Ḅ¦§v¨ᓽ¼஺DEtu⌕º¾¿ᑴshe11,Áᯠ¶fij²ᩎḄCÃÄᯠÅfÆÇÈᩖḄ¿v஺´☢⌕ËÌᐭḄ,Í´☢⌕zuÎ᪆Cᯠ᡻஺ÑÆ
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