Import OpenSSL 1.0.2k (as of svn r86089)

doc/crypto/RAND_load_file.pod

@@ -0,0 +1,53 @@
+=pod
+
+=head1 NAME
+
+RAND_load_file, RAND_write_file, RAND_file_name - PRNG seed file
+
+=head1 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);
+
+=head1 DESCRIPTION
+
+RAND_file_name() generates a default path for the random seed
+file. B<buf> points to a buffer of size B<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 B<num> is
+too small for the path name, an error occurs.
+
+RAND_load_file() reads a number of bytes from file B<filename> and
+adds them to the PRNG. If B<max_bytes> is non-negative,
+up to to B<max_bytes> are read; starting with OpenSSL 0.9.5,
+if B<max_bytes> is -1, the complete file is read.
+
+RAND_write_file() writes a number of random bytes (currently 1024) to
+file B<filename> which can be used to initialize the PRNG by calling
+RAND_load_file() in a later session.
+
+=head1 RETURN VALUES
+
+RAND_load_file() returns the number of bytes read.
+
+RAND_write_file() returns the number of bytes written, and -1 if the
+bytes written were generated without appropriate seed.
+
+RAND_file_name() returns a pointer to B<buf> on success, and NULL on
+error.
+
+=head1 SEE ALSO
+
+L<rand(3)|rand(3)>, L<RAND_add(3)|RAND_add(3)>, L<RAND_cleanup(3)|RAND_cleanup(3)>
+
+=head1 HISTORY
+
+RAND_load_file(), RAND_write_file() and RAND_file_name() are available in
+all versions of SSLeay and OpenSSL.
+
+=cut