操作系统课程实验报告4.docx

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1、中央民族大学操作系统实验报告姓名：黄越伶学 号：2.1011656年 级：.202.级院系：信息工程学院专业：软件工程2023年5月16日msgsnd(msgid,&msg,sizeof(struct msgtype),0);将读到信息作为类型 2 返回给队列msgrcv(msgid,&msg,sizeof(stnjct msgtype)/+ 100,0);读类型 i + 100 的消息/fprintf(stderr,Server Receive:%sn,msg.buffer);将接受的数据回显出来 i+；)exit(0);return 0;)连续输入的进程代码：#include #inclu

2、de #include #include #include #include #include #include #define MSG_FILE server.c#define BUFFER 255#define PERM SRUSR|SWUSR struct msgtype long mtype;char bufferBUFFER+l;)；int main(int argqchar *argv)(struct msgtype msg;key_t key;int msgid;if(argc!=2)/涛命令行参数太少退出(fprintf(stderr,Usage:%s stringna,arg

3、vO);exit(l);)if(key:ftok(MSG_FILE,a) = = -l)消息键值(fprintf(stdercCreat Key Error:%san,strerror(errno);exit(l);)if(msgid:msgget(key,0666|IPC_CREAT)= = -l)/消息队歹 1建立(fprintf(stderr,Creat Message Error:%sann,strerror(errno);exit(l);)int i=l;while(l)msg.mtype= i; 确定类型if(argvl = = end)break;strncpyfmsg.buff

4、ecargvll,BUFFER);msgsnd(msgid,&msg,sizeof(struct msgtype),0);将消息数据结构中的数据传到消息队列fprintf(stderr,Client receive:%sn,msg.buffer);将接受的数据回显出来memset(&msg,0sizeof(struct msgtype);清空fgets(argvl,BUFFER,stdin);/entry messagei + +；)exit(O);return 0;)3、共享内存：程序一：#include #include #includc #include #includc #includ

5、e #include #include #include #dcfinc PERM SRUSR|SWUSRint main(int argc,char *argv)(int shmid;char *p_addr.*c_addr;if(shmid=shmget(IPC_PRIVATE, 1024.PERM)=-1IK 共享内存区。返回缓冲区的 ID 标识值;若失败则返回-1(fprintf(stdcrr,Create Share Memory Error:%sna,strcrror(cirno);打印错误信息 exil(l); 异常退出char s 1024;创建1k长度的字符数组puts(In

6、put the string you want the memory shared:/);输入要传递的信息gets;获取if(fork。)创建进程，父进程就执行if(p_addr:shmat(shmid.0,0);p_addr存共享内存区shmid的入口，存储段连接到由内核选择的第一个可 以地址上memset(p_addr；Ol 024);清空stmcpy(p_addr,s, 1024);向共享内存区写printf(parent sends: %st,the parents pid is %d,p_addr,getpid();/exit(0);正常退出)elsesleep(l);c_addr=

7、shmat(shmid,0.0);子进程向共享区读出数据printf(ntchild gets: %st,the childs pid is %d,c_addr,getpid();打印读出的数据和当前进程号 exit(O);return 0;I/将向程序输入数据，然后由父进程发送，子进程接受，并且把各自的pid号码显示程序二：#include #include #include #include #includc #include #include #include #include #dcfinc PERM SRUSR|SWUSRint main(int argc,char *argv)in

8、t shmid,i,a256;int *p_addr,*c_addr;if(shmid=shmget(IPC_PRIVATEO24.PERM)=-1 )父进程创建 1 k的共享内存区 |fprin(f(s(derr,Create Share Memory Eiror:%sna,sireiror(errno);/打印创建错误信息 exit(l);/异常退出Iputs(begin:t);printf(the process id is %d, the parents id is %dn,geipid(),getppid();打印当前进程号和父进程id号if(fork()=0)创建进程，子进程执行i

9、f/slccp(2);p_addr=shmat(shmid.O,O);/p_addr存共享内存区slimid的入口，存储段连接到由内核选择的第一个可 以地址上for(i=0;i256;i+)*p_addr+=i;将0-255存到指针p_addr指向的共享内存区printf(the process id is %d. the parents id is %dn”,getpid(),getppid();打印当前进程号和父进程id号 exit(0);正常退出else 父进程(sleep ；c_addr=shmal(shmid.0.0);子进程向共享区读出数据，c_addr存共享内存M shmid的入

10、口for(i=0;i256;i+) ai=*c_addr;将共享内存区的数据存至必数组printf(nt process gets: %d t,the processs id is %d,*c_addr,getpid();打印每个内存地址的数据和当 前进程号c_addr+;)printf(nt processs parent id %d t.the processs id is %dn,getppid(),getpid();打印当前进程号和父进程 id号 c_addr=shmat(shmid,0,0);获取共享内存区首地址 for(i=0;i256;i+)*c_addr+=4巧;将每个内存区每

11、个地址上的值都扩大4倍 c_addr=shmat(shmid,O,O); 再次指向首地址 for(i=0;idefio-vtrtual-Rachtne:$ ./client I LOVE YOUClient receive:you deROdeRO-virtual-Rachtne:$ ./serverServer Receive:ILOVEYOU AC deno0deno-vtrtual-machtne:$ ./client clientClient receive:ILOVEYOU denotdeRo-virtual-machine:$ ./serverServer Recetve:clte

12、nt AC denotdeRO-virtual-Rachtne:$ ipcsMessage Queues statuskeynsqtdownerpernsused-bytes messages0X61016C12 edemo6662641SharedMemory Segments keyshntdownerperRSbytesnattchSemaphoreArrays keysemtdownerpernsnsemsdeRoSdeno-virtual-Rachtne:b4$ s|status连续输入消息队列、输出:Ademo(0demo-virtual-machlne: */lab4Q=-Xde

13、mofldeno-vtrtual-Rachtne: /$ gcc server.c -oserverdenodeno-vtrtualRachtne: demoOdemo-virtual-nachtne:$ gcc client.c -o $ tpcsclientMessageQueues keynsqtdownerpernsused-bytesmessagesSharedMemory Segments - keyshntdownerpernsbytesnattchstatusSemaphoreArrays keysentdownerpermsnsensdenotdeno-virtual-nac

14、htne: Client receive:ab Client receive:b c Client receive:c AC denogdeno-vtrtual-nachtne:$ ./client$ tpcsaMessageQueues keymsqtdownerOx610iebcf 0demoperns 666used-1 792jytesmessages 3SharedMemory Segments keyshntdownerpernsbytesnattchstatusSemaphoreArrays keysentdownerpernsnsensdeno0deno-vtrtual-Rac

15、htne: Server Receive:a Server Receive:b$ ./serverServer Receive:cdeno9deno-virtual-Hachtne: Server Receivers Server Receive:b$ ./serverServer Recetve:cACdenodemo-virtual-machine:$ tpcsMessageQueues keymsqtdownerpernsused-bytesmessages0x61O16bcf 0deno666e0SharedMemory Segmentskeyshntdownerpernsbytesn

16、attchstatusSemaphoreArrays keysentdownerpernsnsensdenogdeno-virtudl-Rachtne:$ ./clientnClient receive:nnClient receive:nu Client receive:uACdeHo0deno-virtual-Rachine:$ tpcsMessageQueues keynsqtdownerpernsused-bytesmessages6x61016bcf 6demo6667923SharedMemory Segments.keyshntdownerpernsbytesnattchstat

17、usSemaphoreArrays keysentdownerpernsnsensdenoadeno-virtual-Rachtne:$ ./serverServer Receive:rServer Receive:nServer Receive:uQ Home0 Documenti5 DownloadsCUent Clientdefno9dmodrtu4-*chlnc: -/lb4demo94fnovirtual- Machine:$ ./serverServer Receive:sServer Receive:fClient-virtual RchtM：-vtrtual-nachtM：re

18、ceive:sf receive:freceive:b$ gcc client.c -o client $ ./client svtrtUAl-RAChtM：Server Receive:b3、实现共享内存通信Ademo9demo-virtual-fnachine: */lab4denogdemo-virtual-nachtne:$vt gx.cdeROdemo-vtrtual-nachtne:$vtgxl.cdeRogdemo-virtual-nachtne:$gcc gx.c-ogx.exegx.c: In function ,natn*:gx.c:23:10: arnnq implici

19、t declaration of function gets; did you mean fgets? ;npUctt functton-dtjclaration23|9ets(s);获取|A一Ifgets/usr/btn/ld: /tnp/cc925F37.o: tn function natn*:gx.c:(.text+6xa6): warning: the gets* function is dangerous and should not be used.denogdeno-vtrtual-Rachtne:$ ./gx.exeInput the string you want the

20、memory shared:1234567890qwer tyutopparent sends: 1234567896qwertyuiop ,the parents ptd is 3876denodeRO-vtrtual-Rachtne:$child gets: 1234567890qwertyutop,the childs ptd is 3877deoadenoMrtualFachln。： ！ ：$程序二:demHHoo-virtual-fnachine: -/Ib412MS67890qwertyuUpparent sends: 1234S6789OqMertyutop.the parent

21、s ptd is 3876deRodcRO-virtualMachine:b45child gets: 1234S67896qwertyutop,thechtld*S ptd ts 3877dROdnovtrtual*Rchtft:$denodeno-vtrtU41*nachtrve:$ gcc qxi.c -o gxl.exedeno4dcno-vtrtul-nachtne:$ ./axl.exebegin:the process Id is 12605, tHeparent$ td ts 3394the process Id Is 126X. theParent,s Id Is 12605

22、process gets: 0,thcprocesss idis1266Sprocess gets: 1.th*processs Idis12665process gets: 2,thprocesss tJts12605process Qets: 3.thprocesss IdIs1260$process gets: 4,theprocesss idis126OSprocess gets: S,thprocess( td12665process gets: 6,thprocesss tdu12605process gets: 7.theprocesss tdIs12605process get

23、s: 8.theprocesss idts1260 sprocess gets: 9,thprocesss idis12665process et$: 10.theprocesss td1S12665process gets: 11,thprocesss tdts12605process gets: 12.theprocesss idts12605process gets: 13.theprocesss idis12605prKts$ gets: 14.theprocesss tdts12665process gets: IS,thprocesss tdis12605process gets:

24、 16.thprocesss idIs12605process gets: 17.theprocesss idis1266Sprocess gets: 18.th*processs td12605process gets: 19,thprocesss tdts12605process gets: 20.thprocesss IdIs12605process gets: 21,theprocesss idis1260Sprocess gets: 22, theprocesss td12605process gets: 23,thprocesss tdu1260 sprocess gets: 24

25、.theprocess3 tdIs1260Sprocess gets: 2S.theprocesss idts1260sprocess gets: 26,thprocesss tdis12665process etS: 27.theprocesss tdis12665process gets: 28,thprocesss tdts12605process gets: 29.theprocesss idts12605process gets: 10.theprocesss idis1266sprocess gets: 31.theprocesss tdts12665process qzs: 32

26、,thprocesss tdts12605process gets: 33.theprocesss IdIs12605process gets: 34,thcprocesss idis1266sprocess gets: 35.th*processs td12605process gets: 36.thprocesss tJ12605process gets: 37.theprocess3 IdIs12605process gets: 38,theprocesss idis1260sprocess gets: 39, theprocess( td12605process gets:JKproc

27、esss tdu12665process gets: 41.theprocesss tdIs1260Sprocess gets: 42.theprocesss idts1260sprocess gelt: 43,thprocesss tdis12665process gets: 44.theprocesss td1s12665process gets: 45.thprocesss tdts12605process gets: 46.theprocesss idis1260 sprocess gets: 47.theprocesss tdis1260sprocess gets: 48.tbpro

28、cesss tdts12605process gets: 49,thprocesss tdts12605oroccss acts: SO.theprocesss Id12605实验四：进程通信实验一、实验目的1、熟悉操作系统进程通信原理2、设计程序，实现共享内存、管道通信、消息通信二、实验基本原理1、进程间通信的几种方法简介(1)消息队列：消息队列是消息的链接表，包括Posix消息队列systemV消息队列。有足够权限的进 程可以向队列中添加消息，被赋予读权限的进程则可以读走队列中的消息。(2)共享内存：使得多个进程可以访问同一块内存空间，是最快的可用IPC形式。是针对其他通信机 制运行效率较

29、低而设计的。往往与其它通信机制，如信号量结合使用，来达到进程间的同步及互斥。(3)无名管道(Pipe)及有名管道(namedpipe)：有名管道克服了管道没有名字的限制，因此，除具 有管道所具有的功能外，它还允许无亲缘关系进程间的通信；无名管道可用于有亲缘关系的进程之间彼 此的通信，进行通信时候必须有定的机制保证对管道写和读的互斥：即在读是要关闭写的端口，而在 写的时候也要保证读的一端是关闭的.2、进程通信函数(I)消息队列有关系统调用函数a.创建消息队列使)甘msgget()函数:#includc #inchide #includc ini msgge(key_t key, ini flag

30、);该函数成功调用返回消息队列标识符。其中的key是关键字，可以由ftok()函数得到： key=ftok(tt?,a,);其中可以是任何目录，3是任意字符，即所有群组标识。flag是标识，IPC_CREAT位表示创建，一般由服务器程序创建消息队列时使用。如果是客户程序, 必须打开现存的消息队列，必须不使用IPC.CREATo发送和接收的消息都必须使用一个类似msgbuf的结构表示，msgbuf结构定义如卜.：struct msgbuf |long mlype; char1上面的定义，消息内容只有一个字节，是不实用的，一般我们需要重新定义一个结构：struct amsgbuf long mty

31、pc;char m(exl200;)其中的mtype都是消息类型。b.发送消息实用msgsnd()函数:#inckidc #include #includc 61S8Z1P)S , “)OJ。*：tiaoSSDO JOSWZl“P1s. “a。”3zet:s)o6SSOJd8Z1外t.ssa)ojdwOOI:“6“OJdS8ZI八P1S. 5,8Od3SOI:s)d6SSOJd98g.s“mdZ】ei:$)0S8Z1s.ssddojd2cei:s)6SSOJdWilPIS. 3“)。JdMl,Z9l:、“63”0Jd$8Z1一P1s.ssddojdyTOI:s)d6SQ9Z：八八s. “a。J

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