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#ifdef __sun
#define _XOPEN_SOURCE 1
#define _XOPEN_SOURCE_EXTENDED 1
#define __EXTENSIONS__ 1
#endif
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#if WIN32
/* perl probably did this already */
#include <windows.h>
#elif __CYGWIN__
#include <windows.h>
#include <io.h>
#include <sys/cygwin.h>
#define _open_osfhandle(h,m) cygwin_attach_handle_to_fd ("/dev/tcp", -1, (HANDLE)h, 1, GENERIC_READ | GENERIC_WRITE)
typedef int SOCKET;
#else
#include <stddef.h> // needed by broken bsds for NULL used in sys/uio.h
#include <stdlib.h>
#include <errno.h>
/* send_fd/recv_fd taken from libptytty */
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/socket.h>
#ifndef CMSG_SPACE
# define CMSG_SPACE(len) (sizeof (struct cmsghdr) + len)
#endif
#ifndef CMSG_LEN
# define CMSG_LEN(len) (sizeof (struct cmsghdr) + len)
#endif
#endif
#if defined(WIN32)
/* the rub is this: win32 doesn't seem to have a way to query whether a socket */
/* is non-blocking or not. so we assume it is blocking, make it so if it isn't */
/* and reset it afterwards */
static int
rw (int wr, int fd, char *buf, int len)
{
u_long nbio = 0;
int got = 0;
while (got != len)
{
int sze = wr
? send ((SOCKET)fd, buf, len - got, 0) /* we assume send and recv are macros with arguments */
: recv ((SOCKET)fd, buf, len - got, 0); /* to be on the safe side */
if (sze < 0)
{
if (errno == EAGAIN || errno == WSAEWOULDBLOCK)
{
ioctl (fd, FIONBIO, (void *)&nbio);
nbio = 1;
}
else
break;
}
else if (sze == 0)
break;
else
got += sze;
}
if (nbio)
ioctl (fd, FIONBIO, (void *)&nbio);
return got == len;
}
#endif
static int
fd_send (int socket, int fd)
{
#if defined(WIN32)
DWORD pid;
HANDLE hdl;
pid = GetCurrentProcessId ();
if (!rw (1, socket, (char *)&pid, sizeof (pid)))
return 0;
errno = EBADF;
if (!DuplicateHandle ((HANDLE)-1, (HANDLE)_get_osfhandle (fd), (HANDLE)-1, &hdl, 0, FALSE, DUPLICATE_SAME_ACCESS))
return 0;
if (!rw (1, socket, (char *)&hdl, sizeof (hdl)))
{
CloseHandle (hdl);
return 0;
}
return 1;
#else
void *buf = malloc (CMSG_SPACE (sizeof (int)));
if (!buf)
return 0;
struct msghdr msg;
struct iovec iov;
struct cmsghdr *cmsg;
char data = 0;
iov.iov_base = &data;
iov.iov_len = 1;
msg.msg_name = 0;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = buf;
msg.msg_controllen = CMSG_SPACE (sizeof (int));
cmsg = CMSG_FIRSTHDR (&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN (sizeof (int));
*(int *)CMSG_DATA (cmsg) = fd;
ssize_t result = sendmsg (socket, &msg, 0);
free (buf);
return result >= 0;
#endif
}
static int
fd_recv (int socket)
{
#if defined(WIN32)
DWORD pid;
HANDLE source, rhd, lhd;
if (!rw (0, socket, (char *)&pid, sizeof (pid)))
return -1;
if (!rw (0, socket, (char *)&rhd, sizeof (rhd)))
return -1;
source = OpenProcess (PROCESS_DUP_HANDLE, FALSE, pid);
errno = EACCES;
if (!source)
return -1;
pid = DuplicateHandle (source, rhd, (HANDLE)-1, &lhd,
0, FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE);
CloseHandle (source);
errno = EBADF;
if (!pid)
return -1;
return _open_osfhandle ((intptr_t)lhd, 0);
#else
void *buf = malloc (CMSG_SPACE (sizeof (int)));
if (!buf)
return -1;
struct msghdr msg;
struct iovec iov;
char data = 1;
iov.iov_base = &data;
iov.iov_len = 1;
msg.msg_name = 0;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = buf;
msg.msg_controllen = CMSG_SPACE (sizeof (int));
if (recvmsg (socket, &msg, 0) <= 0)
{
free (buf);
return -1;
}
int fd = -1;
errno = EDOM;
struct cmsghdr *cmsg = CMSG_FIRSTHDR (&msg);
if (data == 0
&& cmsg
&& cmsg->cmsg_level == SOL_SOCKET
&& cmsg->cmsg_type == SCM_RIGHTS
&& cmsg->cmsg_len >= CMSG_LEN (sizeof (int)))
fd = *(int *)CMSG_DATA (cmsg);
free (buf);
return fd;
#endif
}
MODULE = IO::FDPass PACKAGE = IO::FDPass PREFIX = fd_
PROTOTYPES: DISABLE
int
fd_send (int socket, int fd)
int
fd_recv (int socket)
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