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Diffstat (limited to 'secure/lib/libcrypto/man/BIO_s_file.3')
-rw-r--r-- | secure/lib/libcrypto/man/BIO_s_file.3 | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/BIO_s_file.3 b/secure/lib/libcrypto/man/BIO_s_file.3 new file mode 100644 index 0000000..aaabae9 --- /dev/null +++ b/secure/lib/libcrypto/man/BIO_s_file.3 @@ -0,0 +1,286 @@ +.\" Automatically generated by Pod::Man version 1.15 +.\" Thu May 9 13:16:00 2002 +.\" +.\" 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. 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As its name implies it +is a wrapper round the stdio \s-1FILE\s0 structure and it is a +source/sink \s-1BIO\s0. +.PP +Calls to \fIBIO_read()\fR and \fIBIO_write()\fR read and write data to the +underlying stream. \fIBIO_gets()\fR and \fIBIO_puts()\fR are supported on file BIOs. +.PP +\&\fIBIO_flush()\fR on a file \s-1BIO\s0 calls the \fIfflush()\fR function on the wrapped +stream. +.PP +\&\fIBIO_reset()\fR attempts to change the file pointer to the start of file +using fseek(stream, 0, 0). +.PP +\&\fIBIO_seek()\fR sets the file pointer to position \fBofs\fR from start of file +using fseek(stream, ofs, 0). +.PP +\&\fIBIO_eof()\fR calls \fIfeof()\fR. +.PP +Setting the \s-1BIO_CLOSE\s0 flag calls \fIfclose()\fR on the stream when the \s-1BIO\s0 +is freed. +.PP +\&\fIBIO_new_file()\fR creates a new file \s-1BIO\s0 with mode \fBmode\fR the meaning +of \fBmode\fR is the same as the stdio function \fIfopen()\fR. The \s-1BIO_CLOSE\s0 +flag is set on the returned \s-1BIO\s0. +.PP +\&\fIBIO_new_fp()\fR creates a file \s-1BIO\s0 wrapping \fBstream\fR. Flags can be: +\&\s-1BIO_CLOSE\s0, \s-1BIO_NOCLOSE\s0 (the close flag) \s-1BIO_FP_TEXT\s0 (sets the underlying +stream to text mode, default is binary: this only has any effect under +Win32). +.PP +\&\fIBIO_set_fp()\fR set the fp of a file \s-1BIO\s0 to \fBfp\fR. \fBflags\fR has the same +meaning as in \fIBIO_new_fp()\fR, it is a macro. +.PP +\&\fIBIO_get_fp()\fR retrieves the fp of a file \s-1BIO\s0, it is a macro. +.PP +\&\fIBIO_seek()\fR is a macro that sets the position pointer to \fBoffset\fR bytes +from the start of file. +.PP +\&\fIBIO_tell()\fR returns the value of the position pointer. +.PP +\&\fIBIO_read_filename()\fR, \fIBIO_write_filename()\fR, \fIBIO_append_filename()\fR and +\&\fIBIO_rw_filename()\fR set the file \s-1BIO\s0 \fBb\fR to use file \fBname\fR for +reading, writing, append or read write respectively. +.SH "NOTES" +.IX Header "NOTES" +When wrapping stdout, stdin or stderr the underlying stream should not +normally be closed so the \s-1BIO_NOCLOSE\s0 flag should be set. +.PP +Because the file \s-1BIO\s0 calls the underlying stdio functions any quirks +in stdio behaviour will be mirrored by the corresponding \s-1BIO\s0. +.SH "EXAMPLES" +.IX Header "EXAMPLES" +File \s-1BIO\s0 \*(L"hello world\*(R": +.PP +.Vb 3 +\& BIO *bio_out; +\& bio_out = BIO_new_fp(stdout, BIO_NOCLOSE); +\& BIO_printf(bio_out, "Hello World\en"); +.Ve +Alternative technique: +.PP +.Vb 5 +\& BIO *bio_out; +\& bio_out = BIO_new(BIO_s_file()); +\& if(bio_out == NULL) /* Error ... */ +\& if(!BIO_set_fp(bio_out, stdout, BIO_NOCLOSE)) /* Error ... */ +\& BIO_printf(bio_out, "Hello World\en"); +.Ve +Write to a file: +.PP +.Vb 5 +\& BIO *out; +\& out = BIO_new_file("filename.txt", "w"); +\& if(!out) /* Error occurred */ +\& BIO_printf(out, "Hello World\en"); +\& BIO_free(out); +.Ve +Alternative technique: +.PP +.Vb 6 +\& BIO *out; +\& out = BIO_new(BIO_s_file()); +\& if(out == NULL) /* Error ... */ +\& if(!BIO_write_filename(out, "filename.txt")) /* Error ... */ +\& BIO_printf(out, "Hello World\en"); +\& BIO_free(out); +.Ve +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIBIO_s_file()\fR returns the file \s-1BIO\s0 method. +.PP +\&\fIBIO_new_file()\fR and \fIBIO_new_fp()\fR return a file \s-1BIO\s0 or \s-1NULL\s0 if an error +occurred. +.PP +\&\fIBIO_set_fp()\fR and \fIBIO_get_fp()\fR return 1 for success or 0 for failure +(although the current implementation never return 0). +.PP +\&\fIBIO_seek()\fR returns the same value as the underlying \fIfseek()\fR function: +0 for success or \-1 for failure. +.PP +\&\fIBIO_tell()\fR returns the current file position. +.PP +\&\fIBIO_read_filename()\fR, \fIBIO_write_filename()\fR, \fIBIO_append_filename()\fR and +\&\fIBIO_rw_filename()\fR return 1 for success or 0 for failure. +.SH "BUGS" +.IX Header "BUGS" +\&\fIBIO_reset()\fR and \fIBIO_seek()\fR are implemented using \fIfseek()\fR on the underlying +stream. The return value for \fIfseek()\fR is 0 for success or \-1 if an error +occurred this differs from other types of \s-1BIO\s0 which will typically return +1 for success and a non positive value if an error occurred. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +BIO_seek(3), BIO_tell(3), +BIO_reset(3), BIO_flush(3), +BIO_read(3), +BIO_write(3), BIO_puts(3), +BIO_gets(3), BIO_printf(3), +BIO_set_close(3), BIO_get_close(3) |