嵌入式Memo34 linux基础及C高级小结1：简单的文件拷贝小程序 On Aug 19 2013

#include
#include
#include
#include
#include
#include


int main(int argc,char *argv[]){//调用：vi a.c; gcc xx.c; ./a.out a.c b.c；完成a.c到b.c的拷贝

int fd1,fd2;
int ret;

fd1=open(argv[1],O_RDONLY);
fd2=open(argv[2],O_CREAT|O_RDWR);

while(1){
int buf[1024];
memset(buf,0,1024);
ret=read(fd1,buf,1024);
write(fd2,buf,ret);
if(ret<1024)
break;
}
close(fd1);
close(fd2);
return 0;
}