RAND_LOAD_FILE(3)          Library Functions Manual          RAND_LOAD_FILE(3)

NAME
     RAND_file_name, RAND_load_file, RAND_write_file - 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
     RAND_file_name() returns a default path for the random seed file.  buf
     points to a buffer of size num in which to store the filename.  If num is
     too small for the path name, an error occurs.

     RAND_load_file() used to allow for the state of the random number
     generator to be controlled by external sources.  It is kept for ABI
     compatibility but is no longer functional, and should not be used in new
     programs.

     RAND_write_file() writes a number of random bytes (currently 1024) to
     file filename.

RETURN VALUES
     RAND_load_file() returns max_bytes, or a bogus positive value if
     max_bytes is -1.

     RAND_write_file() returns the number of bytes written, or a number less
     than or equal to 1 if an error occurs.

     RAND_file_name() returns a pointer to buf on success or NULL on error.

HISTORY
     RAND_load_file(), RAND_write_file(), and RAND_file_name() first appeared
     in SSLeay 0.5.1 and have been available since OpenBSD 2.4.

Linux 6.8.2-arch2-1             March 27, 2018             Linux 6.8.2-arch2-1