Update files for OpenSSL-1.0.0f import.
[dragonfly.git] / secure / lib / libcrypto / man / BIO_s_fd.3
CommitLineData
e3261593 1.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.19)
8b0cefbb
JR
2.\"
3.\" Standard preamble:
4.\" ========================================================================
8b0cefbb 5.de Sp \" Vertical space (when we can't use .PP)
984263bc
MD
6.if t .sp .5v
7.if n .sp
8..
8b0cefbb 9.de Vb \" Begin verbatim text
984263bc
MD
10.ft CW
11.nf
12.ne \\$1
13..
8b0cefbb 14.de Ve \" End verbatim text
984263bc 15.ft R
984263bc
MD
16.fi
17..
8b0cefbb
JR
18.\" Set up some character translations and predefined strings. \*(-- will
19.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
e257b235
PA
20.\" double quote, and \*(R" will give a right double quote. \*(C+ will
21.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
22.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
23.\" nothing in troff, for use with C<>.
24.tr \(*W-
8b0cefbb 25.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
984263bc 26.ie n \{\
8b0cefbb
JR
27. ds -- \(*W-
28. ds PI pi
29. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
30. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
31. ds L" ""
32. ds R" ""
33. ds C` ""
34. ds C' ""
984263bc
MD
35'br\}
36.el\{\
8b0cefbb
JR
37. ds -- \|\(em\|
38. ds PI \(*p
39. ds L" ``
40. ds R" ''
984263bc 41'br\}
8b0cefbb 42.\"
e257b235
PA
43.\" Escape single quotes in literal strings from groff's Unicode transform.
44.ie \n(.g .ds Aq \(aq
45.el .ds Aq '
46.\"
8b0cefbb 47.\" If the F register is turned on, we'll generate index entries on stderr for
01185282 48.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
8b0cefbb
JR
49.\" entries marked with X<> in POD. Of course, you'll have to process the
50.\" output yourself in some meaningful fashion.
e257b235 51.ie \nF \{\
8b0cefbb
JR
52. de IX
53. tm Index:\\$1\t\\n%\t"\\$2"
984263bc 54..
8b0cefbb
JR
55. nr % 0
56. rr F
984263bc 57.\}
e257b235
PA
58.el \{\
59. de IX
60..
61.\}
aac4ff6f 62.\"
8b0cefbb
JR
63.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
64.\" Fear. Run. Save yourself. No user-serviceable parts.
65. \" fudge factors for nroff and troff
984263bc 66.if n \{\
8b0cefbb
JR
67. ds #H 0
68. ds #V .8m
69. ds #F .3m
70. ds #[ \f1
71. ds #] \fP
984263bc
MD
72.\}
73.if t \{\
8b0cefbb
JR
74. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
75. ds #V .6m
76. ds #F 0
77. ds #[ \&
78. ds #] \&
984263bc 79.\}
8b0cefbb 80. \" simple accents for nroff and troff
984263bc 81.if n \{\
8b0cefbb
JR
82. ds ' \&
83. ds ` \&
84. ds ^ \&
85. ds , \&
86. ds ~ ~
87. ds /
984263bc
MD
88.\}
89.if t \{\
8b0cefbb
JR
90. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
91. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
92. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
93. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
94. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
95. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
984263bc 96.\}
8b0cefbb 97. \" troff and (daisy-wheel) nroff accents
984263bc
MD
98.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
99.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
100.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
101.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
102.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
103.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
104.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
105.ds ae a\h'-(\w'a'u*4/10)'e
106.ds Ae A\h'-(\w'A'u*4/10)'E
8b0cefbb 107. \" corrections for vroff
984263bc
MD
108.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
109.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
8b0cefbb 110. \" for low resolution devices (crt and lpr)
984263bc
MD
111.if \n(.H>23 .if \n(.V>19 \
112\{\
8b0cefbb
JR
113. ds : e
114. ds 8 ss
115. ds o a
116. ds d- d\h'-1'\(ga
117. ds D- D\h'-1'\(hy
118. ds th \o'bp'
119. ds Th \o'LP'
120. ds ae ae
121. ds Ae AE
984263bc
MD
122.\}
123.rm #[ #] #H #V #F C
8b0cefbb
JR
124.\" ========================================================================
125.\"
126.IX Title "BIO_s_fd 3"
e3261593 127.TH BIO_s_fd 3 "2012-01-04" "1.0.0f" "OpenSSL"
e257b235
PA
128.\" For nroff, turn off justification. Always turn off hyphenation; it makes
129.\" way too many mistakes in technical documents.
130.if n .ad l
131.nh
984263bc 132.SH "NAME"
74dab6c2 133BIO_s_fd, BIO_set_fd, BIO_get_fd, BIO_new_fd \- file descriptor BIO
984263bc 134.SH "SYNOPSIS"
8b0cefbb 135.IX Header "SYNOPSIS"
984263bc
MD
136.Vb 1
137\& #include <openssl/bio.h>
e257b235 138\&
984263bc 139\& BIO_METHOD * BIO_s_fd(void);
e257b235 140\&
984263bc
MD
141\& #define BIO_set_fd(b,fd,c) BIO_int_ctrl(b,BIO_C_SET_FD,c,fd)
142\& #define BIO_get_fd(b,c) BIO_ctrl(b,BIO_C_GET_FD,0,(char *)c)
e257b235 143\&
984263bc
MD
144\& BIO *BIO_new_fd(int fd, int close_flag);
145.Ve
146.SH "DESCRIPTION"
8b0cefbb
JR
147.IX Header "DESCRIPTION"
148\&\fIBIO_s_fd()\fR returns the file descriptor \s-1BIO\s0 method. This is a wrapper
984263bc
MD
149round the platforms file descriptor routines such as \fIread()\fR and \fIwrite()\fR.
150.PP
8b0cefbb
JR
151\&\fIBIO_read()\fR and \fIBIO_write()\fR read or write the underlying descriptor.
152\&\fIBIO_puts()\fR is supported but \fIBIO_gets()\fR is not.
984263bc
MD
153.PP
154If the close flag is set then then \fIclose()\fR is called on the underlying
8b0cefbb 155file descriptor when the \s-1BIO\s0 is freed.
984263bc 156.PP
8b0cefbb
JR
157\&\fIBIO_reset()\fR attempts to change the file pointer to the start of file
158using lseek(fd, 0, 0).
984263bc 159.PP
8b0cefbb
JR
160\&\fIBIO_seek()\fR sets the file pointer to position \fBofs\fR from start of file
161using lseek(fd, ofs, 0).
984263bc 162.PP
8b0cefbb 163\&\fIBIO_tell()\fR returns the current file position by calling lseek(fd, 0, 1).
984263bc 164.PP
8b0cefbb 165\&\fIBIO_set_fd()\fR sets the file descriptor of \s-1BIO\s0 \fBb\fR to \fBfd\fR and the close
984263bc
MD
166flag to \fBc\fR.
167.PP
8b0cefbb
JR
168\&\fIBIO_get_fd()\fR places the file descriptor in \fBc\fR if it is not \s-1NULL\s0, it also
169returns the file descriptor. If \fBc\fR is not \s-1NULL\s0 it should be of type
984263bc
MD
170(int *).
171.PP
8b0cefbb 172\&\fIBIO_new_fd()\fR returns a file descriptor \s-1BIO\s0 using \fBfd\fR and \fBclose_flag\fR.
984263bc 173.SH "NOTES"
8b0cefbb 174.IX Header "NOTES"
984263bc
MD
175The behaviour of \fIBIO_read()\fR and \fIBIO_write()\fR depends on the behavior of the
176platforms \fIread()\fR and \fIwrite()\fR calls on the descriptor. If the underlying
8b0cefbb
JR
177file descriptor is in a non blocking mode then the \s-1BIO\s0 will behave in the
178manner described in the \fIBIO_read\fR\|(3) and \fIBIO_should_retry\fR\|(3)
984263bc
MD
179manual pages.
180.PP
181File descriptor BIOs should not be used for socket I/O. Use socket BIOs
182instead.
183.SH "RETURN VALUES"
8b0cefbb
JR
184.IX Header "RETURN VALUES"
185\&\fIBIO_s_fd()\fR returns the file descriptor \s-1BIO\s0 method.
984263bc 186.PP
8b0cefbb
JR
187\&\fIBIO_reset()\fR returns zero for success and \-1 if an error occurred.
188\&\fIBIO_seek()\fR and \fIBIO_tell()\fR return the current file position or \-1
984263bc
MD
189is an error occurred. These values reflect the underlying \fIlseek()\fR
190behaviour.
191.PP
8b0cefbb 192\&\fIBIO_set_fd()\fR always returns 1.
984263bc 193.PP
8b0cefbb 194\&\fIBIO_get_fd()\fR returns the file descriptor or \-1 if the \s-1BIO\s0 has not
984263bc
MD
195been initialized.
196.PP
8b0cefbb 197\&\fIBIO_new_fd()\fR returns the newly allocated \s-1BIO\s0 or \s-1NULL\s0 is an error
984263bc
MD
198occurred.
199.SH "EXAMPLE"
8b0cefbb
JR
200.IX Header "EXAMPLE"
201This is a file descriptor \s-1BIO\s0 version of \*(L"Hello World\*(R":
984263bc
MD
202.PP
203.Vb 4
204\& BIO *out;
205\& out = BIO_new_fd(fileno(stdout), BIO_NOCLOSE);
206\& BIO_printf(out, "Hello World\en");
207\& BIO_free(out);
208.Ve
209.SH "SEE ALSO"
74dab6c2 210.IX Header "SEE ALSO"
8b0cefbb
JR
211\&\fIBIO_seek\fR\|(3), \fIBIO_tell\fR\|(3),
212\&\fIBIO_reset\fR\|(3), \fIBIO_read\fR\|(3),
213\&\fIBIO_write\fR\|(3), \fIBIO_puts\fR\|(3),
214\&\fIBIO_gets\fR\|(3), \fIBIO_printf\fR\|(3),
215\&\fIBIO_set_close\fR\|(3), \fIBIO_get_close\fR\|(3)