From 668ba7d63f68a3326f68abf1dbeae81538e81813 Mon Sep 17 00:00:00 2001
From: Richard Levitte <levitte@openssl.org>
Date: Sat, 26 Feb 2000 01:55:56 +0000
Subject: [PATCH] ftruncate() and fileno() are not supported on all versions of
 OpenVMS (they don't really exist before version 7), so that solution was
 toast. Instead, let's do it the way it's done on Unix, but then remove older
 versions of the file.

That new mechanism *may* fail for some unixly formated file spec,
although I wouldn't worry too much about it.
---
 crypto/rand/randfile.c | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/crypto/rand/randfile.c b/crypto/rand/randfile.c
index 69cb5f4a05..658a8d6b65 100644
--- a/crypto/rand/randfile.c
+++ b/crypto/rand/randfile.c
@@ -63,6 +63,9 @@
 
 #include "openssl/e_os.h"
 
+#ifdef VMS
+#include <unixio.h>
+#endif
 #ifndef NO_SYS_TYPES_H
 # include <sys/types.h>
 #endif
@@ -71,8 +74,8 @@
 #else
 # include <sys/stat.h>
 #endif
-#include OPENSSL_UNISTD
 
+#include <openssl/crypto.h>
 #include <openssl/rand.h>
 
 #undef BUFSIZE
@@ -135,9 +138,15 @@ int RAND_write_file(const char *file)
 	/* Under VMS, fopen(file, "wb") will create a new version of the
 	   same file.  This is not good, so let's try updating an existing
 	   one, and create file only if it doesn't already exist. */
+	/* At the same time, if we just update a file, we also need to
+	   truncate it, and unfortunately, ftruncate() and truncate() do
+	   not exist everywhere.  All that remains is to delete old versions
+	   of the random data file (done at the end). */
+#if 0
 	out=fopen(file,"rb+");
 	if (out == NULL && errno != ENOENT)
 		goto err;
+#endif
 #endif
 
 	if (out == NULL)
@@ -175,8 +184,28 @@ int RAND_write_file(const char *file)
 #ifdef VMS
 	/* We may have updated an existing file using mode "rb+",
 	 * now remove any old extra bytes */
+#if 0
 	if (ret > 0)
 		ftruncate(fileno(out), ret);
+#else
+	/* Try to delete older versions of the file, until there aren't
+	   any */
+	{
+	char *tmpf;
+
+	tmpf = Malloc(strlen(file) + 4);  /* to add ";-1" and a nul */
+	if (tmpf)
+		{
+		strcpy(tmpf, file);
+		strcat(tmpf, ";-1");
+		while(delete(tmpf) == 0)
+			;
+		rename(file,";1"); /* Make sure it's version 1, or we
+				      will reach the limit (32767) at
+				      some point... */
+		}
+	}
+#endif
 #endif
 
 	fclose(out);
-- 
2.34.1