oo.s

利用linux系中的无名管道实现文件传输

#include <stdio.h>
#include <string.h>
#include <fcntl.h>
main()
{
	//char *msg="A message from parent";
	int i, chan[2],m;
	char mm[1024], mn[1024];
	int fdin, n,fdout;
	fdin=open("./nonm.c", O_RDONLY);
	fdout=open("oo.s", O_WRONLY|O_CREAT, 0644);
	//char buf[2048];
	pipe(chan);
	//i=fork();
	if(fork())
	{
			close(chan[0]);
			while((n=read(fdin,mm,1024))>0)
					write(chan[1],mm,strlen(mm)+1);
			close(chan[1]);
		}
	
		else
		{
			
			close(chan[1]);
			while((m=read(chan[0],mn,1024)>0))
			write(fdout,mn,strlen(mn));
			close(chan[0]);
		}


}