RAND_write_file man page on DigitalUNIX

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RAND_load_file(3)					     RAND_load_file(3)

NAME
       RAND_load_file, RAND_write_file, RAND_file_name - PRNG seed file

SYNOPSIS
	#include <openssl/rand.h>

       const char *RAND_file_name(
	       char *buf, size_t num ); int RAND_load_file(
	       const char *filename, long max_bytes ); int RAND_write_file(
	       const char *filename );

DESCRIPTION
       The  RAND_load_file()  function reads a number of bytes from file file‐
       name and adds them to the PRNG. If max_bytes  is	 non-negative,	up  to
       max_bytes  are  read;  starting with OpenSSL 0.9.5, if max_bytes is -1,
       the complete file is read.

       The RAND_write_file() function writes a number of  random  bytes	 (cur‐
       rently  1024) to file filename which can be used to initialize the PRNG
       by calling RAND_load_file() in a later session.

       The RAND_file_name() function generates a default path for  the	random
       seed  file.   buf  points to a buffer of size num in which to store the
       filename. The seed file is $RANDFILE if that  environment  variable  is
       set,  $HOME/.rnd	 otherwise.  If $HOME is not set either, or num is too
       small for the path name, an error occurs.

RETURN VALUES
       The RAND_load_file() function returns the number of bytes read.

       The RAND_write_file() function returns the number of bytes written, and
       -1 if the bytes written were generated without appropriate seed.

       The  RAND_file_name() function returns a pointer to buf on success, and
       NULL on error.

HISTORY
       The RAND_load_file(), RAND_write_file(), and RAND_file_name() functions
       are available in all versions of SSLeay and OpenSSL.

SEE ALSO
       Functions: rand_ssl(3), RAND_add(3), RAND_cleanup(3)

							     RAND_load_file(3)
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