.\"-
.\" Copyright (c) 2000 Robert N. M. Watson
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.Dd September 18, 2000
.Dt CAP_FROM_TEXT 3
.Os
.Sh NAME
.Nm cap_from_text
.Nd convert text to a capability state in working store
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Fd #include <sys/capability.h>
.Ft cap_t
.Fn cap_from_text "const char *buf_p"
.Sh DESCRIPTION
This function allocates and initializes a capability state in working
storage.
It then sets the contents of this newly created capability state to the
state represented by the human-readable, null terminated character string
pointed to by
.Va buf_p .
.Pp
This function may cause memory to be allocated.
The caller should free any releasable memory, when the capability state in
working storage is no longer required, by calling
.Xr cap_free 3
with the
.Va (void *)cap_t
as an argument.
.Sh IMPLEMENTATION NOTES
.Fx Ns 's
support for POSIX.1e interfaces and features is still under
development at this time.
.Sh RETURN VALUES
Upon successful completion, the function returns a pointer to the
internal representation of the capability in working storage.
Otherwise, a value of
.Va (cap_t)NULL
is returned, and
.Va errno
is set to indicate the error.
.Sh ERRORS
If any of the following conditions occur, the
.Fn cap_from_text
function shall return a value of
.Va (cap_t)NULL
and set
.Va errno
to the corresponding value:
.Bl -tag -width Er
.It Bq Er EINVAL
The
.Va buf_p
argument does not refer to a character string, the string pointed to by
.Va buf_p
is not parseable by the function, the text string contains a
capability name or a flag character that the implementation does not
recognize as valid.
.It Bq Er ENOMEM
The capability state to be returned requires more memory than is allowed
by the hardware or system-imposed memory management constraints.
.El
.Sh SEE ALSO
.Xr cap 3 ,
.Xr cap_free 3 ,
.Xr cap_init 3 ,
.Xr cap_set_flag 3 ,
.Xr cap_to_text 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
POSIX.1e support was introduced in
.Fx 4.0 ,
and development continues.
.Sh AUTHORS
.An Robert N M Watson