#include <u.h>#include <mingw32.h>#include <mingwutil.h>#include <libc.h> #include "fdtab.h" struct Msg {	int	pid;	HANDLE h;};intsendfd(int s, int fd){	struct Msg m;	Fd	*f; 	f = fdtget(fd);	if (f==nil)		return -1;	switch (f->type) {	default:		werrstr("not implemented");		return -1;	case Fdtypepipecl:	case Fdtypepipesrv:		break;	}	m.pid = getpid();	m.h = f->h;	write(s, &m, sizeof m);	fdtclose(fd, 0);	return 0;}extern int fdtdebug;intrecvfd(int s){	HANDLE ht, hsp, htp;	struct Msg m;	Fd	*f;	int	fd; 	if(read(s, &m, sizeof m) != sizeof m)		return -1; 	hsp = OpenProcess(PROCESS_DUP_HANDLE, 0, m.pid);	if(hsp==nil)		goto err; 	htp = OpenProcess(PROCESS_DUP_HANDLE, 0, getpid());	if(htp==nil){	errcs:		CloseHandle(hsp);	err:		winerror(nil);		return -1;	}	if(!DuplicateHandle(hsp, m.h, htp, &ht, 0, 0, DUPLICATE_SAME_ACCESS|DUPLICATE_CLOSE_SOURCE)){		CloseHandle(htp);		goto errcs;	}	CloseHandle(hsp);	CloseHandle(htp); 	fd = fdtalloc(nil);	f = fdtab[fd];	f->name = strdup("recvfd");	f->type = Fdtypepipecl;	f->h = ht; 	if (fdtdebug>1)		fprint(2, "%\f\n", fd, f, "recvfd");	return fd;}