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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
commit253e67c8b3a72b3a4757fdbc5845297628db0a4a (patch)
treeadf53b66087aa30dfbf8bf391a1dadb044c3bf4d /static/netbsd/man3/BIO_f_readbuffer.3
parenta9157ce950dfe2fc30795d43b9d79b9d1bffc48b (diff)
docs: Added All NetBSD Manuals
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+.\" $NetBSD: BIO_f_readbuffer.3,v 1.5 2026/04/08 17:06:41 christos Exp $
+.\"
+.\" -*- mode: troff; coding: utf-8 -*-
+.\" Automatically generated by Pod::Man v6.0.2 (Pod::Simple 3.45)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
+.ie n \{\
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds C`
+. ds C'
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
+.de IX
+..
+.nr rF 0
+.if \n(.g .if rF .nr rF 1
+.if (\n(rF:(\n(.g==0)) \{\
+. if \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. if !\nF==2 \{\
+. nr % 0
+. nr F 2
+. \}
+. \}
+.\}
+.rr rF
+.\"
+.\" Required to disable full justification in groff 1.23.0.
+.if n .ds AD l
+.\" ========================================================================
+.\"
+.IX Title "BIO_f_readbuffer 3"
+.TH BIO_f_readbuffer 3 2026-04-07 3.5.6 OpenSSL
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+BIO_f_readbuffer
+\&\- read only buffering BIO that supports BIO_tell() and BIO_seek()
+.SH SYNOPSIS
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/bio.h>
+\&
+\& const BIO_METHOD *BIO_f_readbuffer(void);
+.Ve
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+\&\fBBIO_f_readbuffer()\fR returns the read buffering BIO method.
+.PP
+This BIO filter can be inserted on top of BIO\*(Aqs that do not support \fBBIO_tell()\fR
+or \fBBIO_seek()\fR (e.g. A file BIO that uses stdin).
+.PP
+Data read from a read buffering BIO comes from an internal buffer which is
+filled from the next BIO in the chain.
+.PP
+\&\fBBIO_gets()\fR is supported for read buffering BIOs.
+Writing data to a read buffering BIO is not supported.
+.PP
+Calling \fBBIO_reset()\fR on a read buffering BIO does not clear any buffered data.
+.SH NOTES
+.IX Header "NOTES"
+Read buffering BIOs implement \fBBIO_read_ex()\fR by using \fBBIO_read_ex()\fR operations
+on the next BIO (e.g. a file BIO) in the chain and storing the result in an
+internal buffer, from which bytes are given back to the caller as appropriate
+for the call. \fBBIO_read_ex()\fR is guaranteed to give the caller the number of bytes
+it asks for, unless there\*(Aqs an error or end of communication is reached in the
+next BIO. The internal buffer can grow to cache the entire contents of the next
+BIO in the chain. \fBBIO_seek()\fR uses the internal buffer, so that it can only seek
+into data that is already read.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fBBIO_f_readbuffer()\fR returns the read buffering BIO method.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBbio\fR\|(7),
+\&\fBBIO_read\fR\|(3),
+\&\fBBIO_gets\fR\|(3),
+\&\fBBIO_reset\fR\|(3),
+\&\fBBIO_ctrl\fR\|(3).
+.SH COPYRIGHT
+.IX Header "COPYRIGHT"
+Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+Licensed under the Apache License 2.0 (the "License"). You may not use
+this file except in compliance with the License. You can obtain a copy
+in the file LICENSE in the source distribution or at
+<https://www.openssl.org/source/license.html>.