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#ifndef FDPASS_H
#define FDPASS_H
/* Send data and send_fd (unless it's -1) via sendmsg(). Returns number of
bytes sent, or -1 on error. If at least 1 byte was sent, the send_fd was
also sent. */
ssize_t fd_send(int handle, int send_fd, const void *data, size_t size);
/* Receive data and fd via recvmsg(). Returns number of bytes read, 0 on
disconnection, or -1 on error. If at least 1 byte was read, the fd is also
returned (if it had been sent). If there was no fd received, it's set to
-1. See test-istream-unix.c for different test cases. */
ssize_t fd_read(int handle, void *data, size_t size, int *fd_r);
#endif
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