[c-programmazione di sistema] copia file

[namelessg]

eccolo:

void main(){
int fd,fd2,n;
char buff[3]="abc";
char b[1024];


fd=open("newfile.txt",O_CREAT|O_RDWR,777);
write(fd,buff,3);
close(fd);


fd=open("newfile.txt",O_CREAT|O_RDWR,777);
fd2=open("copiafile.txt",O_CREAT|O_RDWR,777);


while((n=read(fd,b,1024))>0){
write(fd2, b ,n);}




close(fd);
close(fd2);
}