inux-C--.rar_誊抄

#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/sem.h> #include <sys/wait.h> #include <string.h> #include <sys/ipc.h> #include <sys/shm.h> #include "2.h" union semun { int val; /* Value for SETVAL */ struct semid_ds *buf; /* Buffer for IPC_STAT, IPC_SET */ unsigned short *array; /* Array for GETALL, SETALL */ struct seminfo *__buf; /* Buffer for IPC_INFO*/ } arg; void main(){ semid = semget(100,4,IPC_CREAT|0666); arg.val = 1; semctl(semid,0,SETVAL,arg); arg.val = 0; semctl(semid,1,SETVAL,arg); arg.val = 1; semctl(semid,2,SETVAL,arg); arg.val = 0; semctl(semid,3,SETVAL,arg);//初始化信号量集 shmid_S = shmget(200,sizeof(char)*BUFSIZE,IPC_CREAT|0666); shmid_T = shmget(201,sizeof(char)*BUFSIZE,IPC_CREAT|0666); shmid_copy_stop = shmget(202,sizeof(char)*BUFSIZE,IPC_CREAT|0666); shmid_put_stop = shmget(203,sizeof(char)*BUFSIZE,IPC_CREAT|0666); data_of_S = shmat(shmid_S,NULL,0); memset(data_of_S,'\0',BUFSIZE); data_of_T = shmat(shmid_S,NULL,0); memset(data_of_T,'\0',BUFSIZE); data_of_copy_stop = shmat(shmid_S,NULL,0); *data_of_copy_stop = 0; data_of_put_stop = shmat(shmid_S,NULL,0); *data_of_put_stop = 0; if(0 == (pid1=fork())){ puts("get process is running"); execl("./get","get",NULL); } else if(0 == (pid2=fork())){ puts("copy process is running"); execl("./copy","copy",NULL); } else if(0 == (pid3=fork())){ puts("put process is running"); execl("./put","put",NULL); } else{ waitpid(pid1,NULL,0); waitpid(pid2,NULL,0); waitpid(pid3,NULL,0); semctl(semid,0,IPC_RMID); shmdt(data_of_copy_stop); shmdt(data_of_put_stop); shmctl(shmid_S,IPC_RMID,NULL); shmctl(shmid_T,IPC_RMID,NULL); shmctl(shmid_copy_stop,IPC_RMID,NULL); shmctl(shmid_put_stop,IPC_RMID,NULL); } }