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69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
#ifdef __MINGW32__
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#include "io_internal.h"
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#include <errno.h>
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int io_passfd(int64 sock,int64 fd) {
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errno=EINVAL;
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return -1;
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}
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#else
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#ifdef __OpenBSD__
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#warning This is a HORRIBLE kludge around yet another thing OpenBSD broke
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#warning If they make it possible to do file descriptor passing with
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#warning _XOPEN_SOURCE defined, please send me an email so I can remove this.
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#warning _XOPEN_SOURCE needs to be defined for this to work on Solaris.
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#else
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#define _XOPEN_SOURCE
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#define _XOPEN_SOURCE_EXTENDED 1
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#endif
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#include <stddef.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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#include <errno.h>
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#include "io_internal.h"
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union fdmsg {
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struct cmsghdr h;
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/* on NetBSD, CMSG_SPACE is not constant */
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/* char buf[CMSG_SPACE(sizeof(int))]; */
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char buf[1000];
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};
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int io_passfd(int64 sock,int64 fd) {
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struct msghdr msg;
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struct iovec iov;
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#ifdef CMSG_FIRSTHDR
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struct cmsghdr *cmsg;
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#ifndef CMSG_SPACE
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#define CMSG_SPACE(x) x+100
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#endif
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char buf[CMSG_SPACE(sizeof(int))];
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#endif
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iov.iov_len=1;
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iov.iov_base="x";
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msg.msg_iov=&iov;
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msg.msg_iovlen=1;
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msg.msg_name=0;
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msg.msg_namelen=0;
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#ifdef CMSG_FIRSTHDR
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msg.msg_control = buf;
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msg.msg_controllen = sizeof(buf);
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cmsg = CMSG_FIRSTHDR(&msg);
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cmsg->cmsg_level = SOL_SOCKET;
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cmsg->cmsg_type = SCM_RIGHTS;
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#ifndef CMSG_LEN
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#define CMSG_LEN(x) x
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#endif
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cmsg->cmsg_len = CMSG_LEN(sizeof(int));
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msg.msg_controllen = cmsg->cmsg_len;
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*((int*)CMSG_DATA(cmsg))=fd;
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#else
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msg.msg_accrights = (char*)&fd;
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msg.msg_accrightslen = sizeof(fd);
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#endif
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return sendmsg(sock,&msg,0)>=0?0:-1;
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}
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#endif
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