freebsd-dev/lib/libc/posix1e/cap_clear.3
2001-08-09 13:32:13 +00:00

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.\"-
.\" Copyright (c) 2000 Robert N. M. Watson
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.\" $FreeBSD$
.\"
.\" TrustedBSD Project - support for POSIX.1e process capabilities
.\"
.Dd April 1, 2000
.Dt CAP_CLEAR 3
.Os
.Sh NAME
.Nm cap_clear
.Nd initialize a capability state in working store
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Fd #include <sys/capability.h>
.Ft int
.Fn cap_clear "cap_t cap_p"
.Sh DESCRIPTION
The function
.Fn cap_clear
shall initialize the capability state in working storage identified by
.Ar cap_p
so that all capability flags for all capabilities defined in the
implementation shall be cleared.
.Sh IMPLEMENTATION NOTES
.Fx Ns 's
support for POSIX.1e interfaces and features is still under
development at this time.
.Sh RETURN VALUES
.Rv -std cap_clear
.Sh ERRORS
If any of the following conditions occur, the
.Fn cap_clear
function shall return -1 and set
.Va errno
to the corresponding value:
.Bl -tag -width Er
.It Bq Er EINVAL
The value of the
.Va cap_p
argument does not refer to a capability state in the working storage.
Search permission is denied for a component of the path prefix, or the
.El
.Sh SEE ALSO
.Xr cap 3 ,
.Xr cap_init 3 ,
.Xr cap_set_flag 3 ,
.Xr posix1e 3
.Sh STANDARDS
POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion
of the draft continues on the cross-platform POSIX.1e implementation
mailing list. To join this list, see the
.Fx
POSIX.1e implementation
page for more information.
.Sh HISTORY
Support for POSIX.1e Capabilities was developed as part of the TrustedBSD
Project.
POSIX.1e Capability support was introduced in
.Fx 5.0 ,
and development continues.
.Sh AUTHORS
.An Robert N M Watson