230 lines
6.7 KiB
Groff
230 lines
6.7 KiB
Groff
.\" Automatically generated by Pod::Man version 1.15
|
|
.\" Mon Feb 3 10:01:40 2003
|
|
.\"
|
|
.\" Standard preamble:
|
|
.\" ======================================================================
|
|
.de Sh \" Subsection heading
|
|
.br
|
|
.if t .Sp
|
|
.ne 5
|
|
.PP
|
|
\fB\\$1\fR
|
|
.PP
|
|
..
|
|
.de Sp \" Vertical space (when we can't use .PP)
|
|
.if t .sp .5v
|
|
.if n .sp
|
|
..
|
|
.de Ip \" List item
|
|
.br
|
|
.ie \\n(.$>=3 .ne \\$3
|
|
.el .ne 3
|
|
.IP "\\$1" \\$2
|
|
..
|
|
.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. | will give a
|
|
.\" real vertical bar. \*(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-|\(bv\*(Tr
|
|
.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" ''
|
|
'br\}
|
|
.\"
|
|
.\" If the F register is turned on, we'll generate index entries on stderr
|
|
.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and
|
|
.\" index entries marked with X<> in POD. Of course, you'll have to process
|
|
.\" the output yourself in some meaningful fashion.
|
|
.if \nF \{\
|
|
. de IX
|
|
. tm Index:\\$1\t\\n%\t"\\$2"
|
|
..
|
|
. nr % 0
|
|
. rr F
|
|
.\}
|
|
.\"
|
|
.\" For nroff, turn off justification. Always turn off hyphenation; it
|
|
.\" makes way too many mistakes in technical documents.
|
|
.hy 0
|
|
.if n .na
|
|
.\"
|
|
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
|
|
.\" Fear. Run. Save yourself. No user-serviceable parts.
|
|
.bd B 3
|
|
. \" 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_s_fd 3"
|
|
.TH BIO_s_fd 3 "0.9.7" "2003-02-03" "OpenSSL"
|
|
.UC
|
|
.SH "NAME"
|
|
BIO_s_fd, BIO_set_fd, BIO_get_fd, BIO_new_fd \- file descriptor \s-1BIO\s0
|
|
.SH "SYNOPSIS"
|
|
.IX Header "SYNOPSIS"
|
|
.Vb 1
|
|
\& #include <openssl/bio.h>
|
|
.Ve
|
|
.Vb 1
|
|
\& BIO_METHOD * BIO_s_fd(void);
|
|
.Ve
|
|
.Vb 2
|
|
\& #define BIO_set_fd(b,fd,c) BIO_int_ctrl(b,BIO_C_SET_FD,c,fd)
|
|
\& #define BIO_get_fd(b,c) BIO_ctrl(b,BIO_C_GET_FD,0,(char *)c)
|
|
.Ve
|
|
.Vb 1
|
|
\& BIO *BIO_new_fd(int fd, int close_flag);
|
|
.Ve
|
|
.SH "DESCRIPTION"
|
|
.IX Header "DESCRIPTION"
|
|
\&\fIBIO_s_fd()\fR returns the file descriptor \s-1BIO\s0 method. This is a wrapper
|
|
round the platforms file descriptor routines such as \fIread()\fR and \fIwrite()\fR.
|
|
.PP
|
|
\&\fIBIO_read()\fR and \fIBIO_write()\fR read or write the underlying descriptor.
|
|
\&\fIBIO_puts()\fR is supported but \fIBIO_gets()\fR is not.
|
|
.PP
|
|
If the close flag is set then then \fIclose()\fR is called on the underlying
|
|
file descriptor when the \s-1BIO\s0 is freed.
|
|
.PP
|
|
\&\fIBIO_reset()\fR attempts to change the file pointer to the start of file
|
|
using lseek(fd, 0, 0).
|
|
.PP
|
|
\&\fIBIO_seek()\fR sets the file pointer to position \fBofs\fR from start of file
|
|
using lseek(fd, ofs, 0).
|
|
.PP
|
|
\&\fIBIO_tell()\fR returns the current file position by calling lseek(fd, 0, 1).
|
|
.PP
|
|
\&\fIBIO_set_fd()\fR sets the file descriptor of \s-1BIO\s0 \fBb\fR to \fBfd\fR and the close
|
|
flag to \fBc\fR.
|
|
.PP
|
|
\&\fIBIO_get_fd()\fR places the file descriptor in \fBc\fR if it is not \s-1NULL\s0, it also
|
|
returns the file descriptor. If \fBc\fR is not \s-1NULL\s0 it should be of type
|
|
(int *).
|
|
.PP
|
|
\&\fIBIO_new_fd()\fR returns a file descriptor \s-1BIO\s0 using \fBfd\fR and \fBclose_flag\fR.
|
|
.SH "NOTES"
|
|
.IX Header "NOTES"
|
|
The behaviour of \fIBIO_read()\fR and \fIBIO_write()\fR depends on the behavior of the
|
|
platforms \fIread()\fR and \fIwrite()\fR calls on the descriptor. If the underlying
|
|
file descriptor is in a non blocking mode then the \s-1BIO\s0 will behave in the
|
|
manner described in the BIO_read(3) and BIO_should_retry(3)
|
|
manual pages.
|
|
.PP
|
|
File descriptor BIOs should not be used for socket I/O. Use socket BIOs
|
|
instead.
|
|
.SH "RETURN VALUES"
|
|
.IX Header "RETURN VALUES"
|
|
\&\fIBIO_s_fd()\fR returns the file descriptor \s-1BIO\s0 method.
|
|
.PP
|
|
\&\fIBIO_reset()\fR returns zero for success and \-1 if an error occurred.
|
|
\&\fIBIO_seek()\fR and \fIBIO_tell()\fR return the current file position or \-1
|
|
is an error occurred. These values reflect the underlying \fIlseek()\fR
|
|
behaviour.
|
|
.PP
|
|
\&\fIBIO_set_fd()\fR always returns 1.
|
|
.PP
|
|
\&\fIBIO_get_fd()\fR returns the file descriptor or \-1 if the \s-1BIO\s0 has not
|
|
been initialized.
|
|
.PP
|
|
\&\fIBIO_new_fd()\fR returns the newly allocated \s-1BIO\s0 or \s-1NULL\s0 is an error
|
|
occurred.
|
|
.SH "EXAMPLE"
|
|
.IX Header "EXAMPLE"
|
|
This is a file descriptor \s-1BIO\s0 version of \*(L"Hello World\*(R":
|
|
.PP
|
|
.Vb 4
|
|
\& BIO *out;
|
|
\& out = BIO_new_fd(fileno(stdout), BIO_NOCLOSE);
|
|
\& BIO_printf(out, "Hello World\en");
|
|
\& BIO_free(out);
|
|
.Ve
|
|
.SH "SEE ALSO"
|
|
.IX Header "SEE ALSO"
|
|
BIO_seek(3), BIO_tell(3),
|
|
BIO_reset(3), BIO_read(3),
|
|
BIO_write(3), BIO_puts(3),
|
|
BIO_gets(3), BIO_printf(3),
|
|
BIO_set_close(3), BIO_get_close(3)
|