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-.\" -*-nroff-*-
-.TH fdpass 3 "28 November 2003" "Straylight/Edgeware" "mLib utilities library"
-.SH NAME
-fdpass \- file descriptor passing
-.\" @fdpass_send
-.\" @fdpass_recv
-.SH SYNOPSIS
-.nf
-.B "#include <mLib/fdpass.h>"
-
-.BI "ssize_t fdpass_send(int " sock ", int " fd ", const void *" p ", size_t " sz );
-.BI "ssize_t fdpass_recv(int " sock ", int *" fd ", void *" p ", size_t " sz );
-.fi
-.SH DESCRIPTION
-The function
-.B fdpass_send
-sends the file descriptor
-.I fd
-as ancillary data attached to the buffer pointed to by
-.I p
-of length
-.I sz
-over the Unix-domain socket
-.IR sock .
-It returns the amount of data sent, or \-1 on error.  For more details,
-see
-.BR sendmsg (2)
-and
-.BR unix (7).
-.PP
-The function
-.B fdpass_recv
-receives at most
-.I sz
-bytes of data into the buffer pointed to by
-.IR p ,
-together with at most one file descriptor passed as ancillary data,
-which is written to the integer pointed to by
-.IR fd .
-Other file descriptors received are closed; any other ancillary messages
-are ignored.  If no file descriptor is received,
-.BI * fd
-is set to \-1.  The function returns the number of bytes read, or \-1 on
-error.  For more details, see
-.BR recvmsg (2)
-and
-.BR unix (7).
-.SH "SEE ALSO"
-.BR recvmsg (2),
-.BR sendmsg (2),
-.BR mLib (3),
-.BR unix (7).
-.SH AUTHOR
-Mark Wooding, <mdw@distorted.org.uk>