进程间通信之有名管道（fifo） 完整代码

#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/stat.h> #include <fcntl.h> #include <string.h> #include <errno.h> #define BUFFER_SIZE 1024 int main(int argc,char **argv) { int fd; if(argc<2) { fprintf(stdout,"Usagea:%s<filename>\n",argv[0]); exit(-1); } if((fd=open(argv[1],O_RDONLY))<0) { fprintf(stderr,"open fifo %s for reading failed:%s\n",argv[1],strerror(errno)); exit(-1); } fprintf(stdout,"open fifo %s for reading successed.\n",argv[0]); char buffer[BUFFER_SIZE]="0"; ssize_t n; while(1) { if((n=read(fd,buffer,BUFFER_SIZE))<0) { fprintf(stderr,"read failed on %s:%s\n",argv[1],strerror(errno)); exit(EXIT_FAILURE); } else if(0==n) { fprintf(stderr,"peer closed fifo.\n"); break; } else { fprintf(stdout,"read%d bytes from fifo:%s\n",n,buffer); } } return 0; }