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Fix setbuf use for VMS C

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The VMS C RTL has setbuf() working for short pointers only, probably
the FILE pointer will always be in P0 (the lower 4GB).  Fortunately,
this only generates a warning about possible data loss (doesn't apply
in this case) that we can simply turn off.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5789)
This commit is contained in:
Richard Levitte 2018-03-29 10:34:11 +02:00
parent 5d322036b4
commit 5848be0488
1 changed files with 14 additions and 0 deletions
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14
crypto/rand/randfile.c
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@ -99,6 +99,17 @@ int RAND_load_file(const char *file, long bytes)
if (!S_ISREG(sb.st_mode) && bytes < 0)
bytes = 256;
#endif
/*
* On VMS, setbuf() will only take 32-bit pointers, and a compilation
* with /POINTER_SIZE=64 will give off a MAYLOSEDATA2 warning here.
* However, we trust that the C RTL will never give us a FILE pointer
* above the first 4 GB of memory, so we simply turn off the warning
* temporarily.
*/
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
# pragma environment save
# pragma message disable maylosedata2
#endif
/*
* Don't buffer, because even if |file| is regular file, we have
@ -106,6 +117,9 @@ int RAND_load_file(const char *file, long bytes)
* contents lying around?
*/
setbuf(in, NULL);
#if defined(OPENSSL_SYS_VMS) && defined(__DECC)
# pragma environment restore
#endif
for ( ; ; ) {
if (bytes > 0)