mirror of https://github.com/mkerrisk/man-pages
63 lines
2.1 KiB
Plaintext
63 lines
2.1 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "<sys/un.h>" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" <sys/un.h>
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.SH NAME
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sys/un.h \- definitions for UNIX domain sockets
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.SH SYNOPSIS
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.LP
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\fB#include <sys/un.h>\fP
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.SH DESCRIPTION
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.LP
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The \fI<sys/un.h>\fP header shall define the \fBsockaddr_un\fP structure
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that includes at least the following
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members:
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.sp
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.RS
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.nf
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\fBsa_family_t sun_family \fP Address family. \fB
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char sun_path[] \fP Socket pathname. \fB
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\fP
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.fi
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.RE
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.LP
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The \fBsockaddr_un\fP structure is used to store addresses for UNIX
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domain sockets. Values of this type shall be cast by
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applications to \fBstruct sockaddr\fP for use with socket functions.
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.LP
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The \fBsa_family_t\fP type shall be defined as described in \fI<sys/socket.h>\fP
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\&.
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.LP
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\fIThe following sections are informative.\fP
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.SH APPLICATION USAGE
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.LP
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The size of \fIsun_path\fP has intentionally been left undefined.
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This is because different implementations use different
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sizes. For example, 4.3 BSD uses a size of 108, and 4.4 BSD uses a
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size of 104. Since most implementations originate from BSD
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versions, the size is typically in the range 92 to 108.
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.LP
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Applications should not assume a particular length for \fIsun_path\fP
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or assume that it can hold {_POSIX_PATH_MAX} characters
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(255).
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fI<sys/socket.h>\fP , the System Interfaces volume of
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IEEE\ Std\ 1003.1-2001, \fIbind\fP(), \fIsocket\fP(), \fIsocketpair\fP()
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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