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Diffstat (limited to 'secure/lib/libcrypto/man/man7/bio.7')
| -rw-r--r-- | secure/lib/libcrypto/man/man7/bio.7 | 217 |
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diff --git a/secure/lib/libcrypto/man/man7/bio.7 b/secure/lib/libcrypto/man/man7/bio.7 new file mode 100644 index 000000000000..2d16323f72a2 --- /dev/null +++ b/secure/lib/libcrypto/man/man7/bio.7 @@ -0,0 +1,217 @@ +.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.40) +.\" +.\" 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 +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. Capital omega is used to do unbreakable dashes and +.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, +.\" nothing in troff, for use with C<>. +.tr \(*W- +.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' +.ie n \{\ +. ds -- \(*W- +. ds PI pi +. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch +. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch +. ds L" "" +. ds R" "" +. ds C` "" +. ds C' "" +'br\} +.el\{\ +. ds -- \|\(em\| +. ds PI \(*p +. ds L" `` +. ds R" '' +. 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 +.\" +.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). +.\" Fear. Run. Save yourself. No user-serviceable parts. +. \" fudge factors for nroff and troff +.if n \{\ +. ds #H 0 +. ds #V .8m +. ds #F .3m +. ds #[ \f1 +. ds #] \fP +.\} +.if t \{\ +. ds #H ((1u-(\\\\n(.fu%2u))*.13m) +. ds #V .6m +. ds #F 0 +. ds #[ \& +. ds #] \& +.\} +. \" simple accents for nroff and troff +.if n \{\ +. ds ' \& +. ds ` \& +. ds ^ \& +. ds , \& +. ds ~ ~ +. ds / +.\} +.if t \{\ +. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" +. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' +. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' +. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' +. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' +. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' +.\} +. \" troff and (daisy-wheel) nroff accents +.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' +.ds 8 \h'\*(#H'\(*b\h'-\*(#H' +.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] +.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' +.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' +.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] +.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] +.ds ae a\h'-(\w'a'u*4/10)'e +.ds Ae A\h'-(\w'A'u*4/10)'E +. \" corrections for vroff +.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' +.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' +. \" for low resolution devices (crt and lpr) +.if \n(.H>23 .if \n(.V>19 \ +\{\ +. ds : e +. ds 8 ss +. ds o a +. ds d- d\h'-1'\(ga +. ds D- D\h'-1'\(hy +. ds th \o'bp' +. ds Th \o'LP' +. ds ae ae +. ds Ae AE +.\} +.rm #[ #] #H #V #F C +.\" ======================================================================== +.\" +.IX Title "BIO 7" +.TH BIO 7 "2019-09-10" "1.1.1d" "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 \- Basic I/O abstraction +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/bio.h> +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +A \s-1BIO\s0 is an I/O abstraction, it hides many of the underlying I/O +details from an application. If an application uses a \s-1BIO\s0 for its +I/O it can transparently handle \s-1SSL\s0 connections, unencrypted network +connections and file I/O. +.PP +There are two type of \s-1BIO,\s0 a source/sink \s-1BIO\s0 and a filter \s-1BIO.\s0 +.PP +As its name implies a source/sink \s-1BIO\s0 is a source and/or sink of data, +examples include a socket \s-1BIO\s0 and a file \s-1BIO.\s0 +.PP +A filter \s-1BIO\s0 takes data from one \s-1BIO\s0 and passes it through to +another, or the application. The data may be left unmodified (for +example a message digest \s-1BIO\s0) or translated (for example an +encryption \s-1BIO\s0). The effect of a filter \s-1BIO\s0 may change according +to the I/O operation it is performing: for example an encryption +\&\s-1BIO\s0 will encrypt data if it is being written to and decrypt data +if it is being read from. +.PP +BIOs can be joined together to form a chain (a single \s-1BIO\s0 is a chain +with one component). A chain normally consist of one source/sink +\&\s-1BIO\s0 and one or more filter BIOs. Data read from or written to the +first \s-1BIO\s0 then traverses the chain to the end (normally a source/sink +\&\s-1BIO\s0). +.PP +Some BIOs (such as memory BIOs) can be used immediately after calling +\&\fBBIO_new()\fR. Others (such as file BIOs) need some additional initialization, +and frequently a utility function exists to create and initialize such BIOs. +.PP +If \fBBIO_free()\fR is called on a \s-1BIO\s0 chain it will only free one \s-1BIO\s0 resulting +in a memory leak. +.PP +Calling \fBBIO_free_all()\fR on a single \s-1BIO\s0 has the same effect as calling +\&\fBBIO_free()\fR on it other than the discarded return value. +.PP +Normally the \fBtype\fR argument is supplied by a function which returns a +pointer to a \s-1BIO_METHOD.\s0 There is a naming convention for such functions: +a source/sink \s-1BIO\s0 is normally called BIO_s_*() and a filter \s-1BIO\s0 +BIO_f_*(); +.SH "EXAMPLES" +.IX Header "EXAMPLES" +Create a memory \s-1BIO:\s0 +.PP +.Vb 1 +\& BIO *mem = BIO_new(BIO_s_mem()); +.Ve +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fBBIO_ctrl\fR\|(3), +\&\fBBIO_f_base64\fR\|(3), \fBBIO_f_buffer\fR\|(3), +\&\fBBIO_f_cipher\fR\|(3), \fBBIO_f_md\fR\|(3), +\&\fBBIO_f_null\fR\|(3), \fBBIO_f_ssl\fR\|(3), +\&\fBBIO_find_type\fR\|(3), \fBBIO_new\fR\|(3), +\&\fBBIO_new_bio_pair\fR\|(3), +\&\fBBIO_push\fR\|(3), \fBBIO_read_ex\fR\|(3), +\&\fBBIO_s_accept\fR\|(3), \fBBIO_s_bio\fR\|(3), +\&\fBBIO_s_connect\fR\|(3), \fBBIO_s_fd\fR\|(3), +\&\fBBIO_s_file\fR\|(3), \fBBIO_s_mem\fR\|(3), +\&\fBBIO_s_null\fR\|(3), \fBBIO_s_socket\fR\|(3), +\&\fBBIO_set_callback\fR\|(3), +\&\fBBIO_should_retry\fR\|(3) +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved. +.PP +Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use +this file except in compliance with the License. You can obtain a copy +in the file \s-1LICENSE\s0 in the source distribution or at +<https://www.openssl.org/source/license.html>. |