BIO_new_file man page on MacOSX

Man page or keyword search:  
man Server   23457 pages
apropos Keyword Search (all sections)
Output format
MacOSX logo
[printable version]

BIO_s_file(3)			    OpenSSL			 BIO_s_file(3)

       BIO_s_file, BIO_new_file, BIO_new_fp, BIO_set_fp, BIO_get_fp,
       BIO_read_filename, BIO_write_filename, BIO_append_filename,
       BIO_rw_filename - FILE bio

	#include <openssl/bio.h>

	BIO_METHOD *   BIO_s_file(void);
	BIO *BIO_new_file(const char *filename, const char *mode);
	BIO *BIO_new_fp(FILE *stream, int flags);

	BIO_set_fp(BIO *b,FILE *fp, int flags);
	BIO_get_fp(BIO *b,FILE **fpp);

	int BIO_read_filename(BIO *b, char *name)
	int BIO_write_filename(BIO *b, char *name)
	int BIO_append_filename(BIO *b, char *name)
	int BIO_rw_filename(BIO *b, char *name)

       BIO_s_file() returns the BIO file method. As its name implies it is a
       wrapper round the stdio FILE structure and it is a source/sink BIO.

       Calls to BIO_read() and BIO_write() read and write data to the
       underlying stream. BIO_gets() and BIO_puts() are supported on file

       BIO_flush() on a file BIO calls the fflush() function on the wrapped

       BIO_reset() attempts to change the file pointer to the start of file
       using fseek(stream, 0, 0).

       BIO_seek() sets the file pointer to position ofs from start of file
       using fseek(stream, ofs, 0).

       BIO_eof() calls feof().

       Setting the BIO_CLOSE flag calls fclose() on the stream when the BIO is

       BIO_new_file() creates a new file BIO with mode mode the meaning of
       mode is the same as the stdio function fopen(). The BIO_CLOSE flag is
       set on the returned BIO.

       BIO_new_fp() creates a file BIO wrapping stream. Flags can be:
       BIO_CLOSE, BIO_NOCLOSE (the close flag) BIO_FP_TEXT (sets the
       underlying stream to text mode, default is binary: this only has any
       effect under Win32).

       BIO_set_fp() set the fp of a file BIO to fp. flags has the same meaning
       as in BIO_new_fp(), it is a macro.

       BIO_get_fp() retrieves the fp of a file BIO, it is a macro.

       BIO_seek() is a macro that sets the position pointer to offset bytes
       from the start of file.

       BIO_tell() returns the value of the position pointer.

       BIO_read_filename(), BIO_write_filename(), BIO_append_filename() and
       BIO_rw_filename() set the file BIO b to use file name for reading,
       writing, append or read write respectively.

       When wrapping stdout, stdin or stderr the underlying stream should not
       normally be closed so the BIO_NOCLOSE flag should be set.

       Because the file BIO calls the underlying stdio functions any quirks in
       stdio behaviour will be mirrored by the corresponding BIO.

       File BIO "hello world":

	BIO *bio_out;
	bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
	BIO_printf(bio_out, "Hello World\n");

       Alternative technique:

	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\n");

       Write to a file:

	BIO *out;
	out = BIO_new_file("filename.txt", "w");
	if(!out) /* Error occurred */
	BIO_printf(out, "Hello World\n");

       Alternative technique:

	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\n");

       BIO_s_file() returns the file BIO method.

       BIO_new_file() and BIO_new_fp() return a file BIO or NULL if an error

       BIO_set_fp() and BIO_get_fp() return 1 for success or 0 for failure
       (although the current implementation never return 0).

       BIO_seek() returns the same value as the underlying fseek() function: 0
       for success or -1 for failure.

       BIO_tell() returns the current file position.

       BIO_read_filename(), BIO_write_filename(),  BIO_append_filename() and
       BIO_rw_filename() return 1 for success or 0 for failure.

       BIO_reset() and BIO_seek() are implemented using fseek() on the
       underlying stream. The return value for fseek() is 0 for success or -1
       if an error occurred this differs from other types of BIO which will
       typically return 1 for success and a non positive value if an error

       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)

50				  2013-03-05			 BIO_s_file(3)

List of man pages available for MacOSX

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
Vote for polarhome
Free Shell Accounts :: the biggest list on the net