8eec1389fb
which is redundant. They are now in their own document. Also, in the name section, all the functions described shoud be enumerated. This will also make it much simpler to generate softlinks name like each function to man-pages containing the info.
119 lines
3.3 KiB
Text
119 lines
3.3 KiB
Text
=pod
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=head1 NAME
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BIO_s_file, BIO_new_file, BIO_new_fp, BIO_set_fp, BIO_get_fp,
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BIO_read_filename, BIO_write_filename, BIO_append_filename,
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BIO_rw_filename - FILE bio
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=head1 SYNOPSIS
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#include <openssl/bio.h>
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BIO_METHOD * BIO_s_file(void);
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BIO *BIO_new_file(const char *filename, const char *mode);
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BIO *BIO_new_fp(FILE *stream, int flags);
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BIO_set_fp(BIO *b,FILE *fp, int flags);
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BIO_get_fp(BIO *b,FILE **fpp);
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int BIO_read_filename(BIO *b, char *name)
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int BIO_write_filename(BIO *b, char *name)
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int BIO_append_filename(BIO *b, char *name)
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int BIO_rw_filename(BIO *b, char *name)
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=head1 DESCRIPTION
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BIO_s_file() returns the BIO file method. As its name implies it
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is a wrapper round the stdio FILE structure and it is a
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source/sink BIO.
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Calls to BIO_read() and BIO_write() read and write data to the
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underlying stream. BIO_gets() and BIO_puts() are supported on file BIOs.
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BIO_flush() on a file BIO calls the fflush() function on the wrapped
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stream.
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BIO_reset() on a file BIO calls fseek() to reset the position indicator
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to the start of the file.
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BIO_eof() calls feof().
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Setting the BIO_CLOSE flag calls fclose() on the stream when the BIO
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is freed.
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BIO_new_file() creates a new file BIO with mode B<mode> the meaning
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of B<mode> is the same as the stdio function fopen(). The BIO_CLOSE
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flag is set on the returned BIO.
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BIO_new_fp() creates a file BIO wrapping B<stream>. Flags can be:
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BIO_CLOSE, BIO_NOCLOSE (the close flag) BIO_FP_TEXT (sets the underlying
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stream to text mode, default is binary: this only has any effect under
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Win32).
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BIO_set_fp() set the fp of a file BIO to B<fp>. B<flags> has the same
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meaning as in BIO_new_fp(), it is a macro.
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BIO_get_fp() retrieves the fp of a file BIO, it is a macro.
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BIO_read_filename(), BIO_write_filename(), BIO_append_filename() and
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BIO_rw_filename() set the file BIO B<b> to use file B<name> for
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reading, writing, append or read write respectively.
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=head1 NOTES
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When wrapping stdout, stdin or stderr the underlying stream should not
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normally be closed so the BIO_NOCLOSE flag should be set.
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Because the file BIO calls the underlying stdio functions any quirks
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in stdio behaviour will be mirrored by the corresponding BIO.
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=head1 EXAMPLES
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File BIO "hello world":
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BIO *bio_out;
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bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
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BIO_printf(bio_out, "Hello World\n");
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Alternative technique:
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BIO *bio_out;
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bio_out = BIO_new(BIO_s_file());
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if(bio_out == NULL) /* Error ... */
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if(!BIO_set_fp(bio_out, stdout, BIO_NOCLOSE)) /* Error ... */
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BIO_printf(bio_out, "Hello World\n");
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Write to a file:
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BIO *out;
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out = BIO_new_file("filename.txt", "w");
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if(!out) /* Error occurred */
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BIO_printf(out, "Hello World\n");
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BIO_free(out);
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Alternative technique:
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BIO *out;
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out = BIO_new(BIO_s_file());
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if(out == NULL) /* Error ... */
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if(!BIO_read_filename(out, "filename.txt")) /* Error ... */
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BIO_printf(out, "Hello World\n");
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BIO_free(out);
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=head1 RETURN VALUES
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BIO_s_file() returns the file BIO method.
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BIO_new_file() and BIO_new_fp() return a file BIO or NULL if an error
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occurred.
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BIO_set_fp() and BIO_get_fp() return 1 for success or 0 for failure
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(although the current implementation never return 0).
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BIO_read_filename(), BIO_write_filename(), BIO_append_filename() and
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BIO_rw_filename() return 1 for success or 0 for failure.
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=head1 SEE ALSO
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L<BIO_seek(3)|BIO_seek(3)>, L<BIO_tell(3)|BIO_tell(3)>, TBA
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