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| SENDFD(3) | FreeBSD Library Functions Manual | SENDFD(3) |
NAME
sendfd, recvfd - pass file descriptors along Unix domain socketsSYNOPSIS
#include <u.h>#include <libc.h>
int sendfd(int socket, int fd)
int recvfd(int socket)
DESCRIPTION
Recvfd and sendfd can be used to pass an open file descriptor over a Unix domain socket from one process to another. Since is implemented with instead of socket can be a file descriptor obtained fromSendfd sends the file descriptor fd along the socket to a process calling recvfd on the other end.
It is assumed that the two sides have coordinated and agreed to transfer a file descriptor already, so that the sendfd is met with a recvfd instead of an ordinary read.
The file descriptor number may change on its way between processes, but the kernel structure it represents will not.
SOURCE
/src/lib9/sendfd.cSEE ALSO
sendmsg in
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