diff options
Diffstat (limited to 'winsup/cygwin/miscfuncs.cc')
-rw-r--r-- | winsup/cygwin/miscfuncs.cc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc index 796494132..54150f106 100644 --- a/winsup/cygwin/miscfuncs.cc +++ b/winsup/cygwin/miscfuncs.cc @@ -236,6 +236,25 @@ check_iovec (const struct iovec *iov, int iovcnt, bool forwrite) return -1; } +/* There's a bug in ntsecapi.h (Mingw as well as MSFT). SystemFunction036 + is, in fact, a WINAPI function, but it's not defined as such. Therefore + we have to do it correctly here. */ +#define RtlGenRandom SystemFunction036 +extern "C" BOOLEAN WINAPI RtlGenRandom (PVOID, ULONG); + +/* Used by arc2random, fhandler_socket and fhandler_random. */ +extern "C" int +getentropy (void *ptr, size_t len) +{ + if (!RtlGenRandom (ptr, len)) + { + debug_printf ("%E = RtlGenRandom()"); + set_errno (EIO); + return -1; + } + return 0; +} + /* Try hard to schedule another thread. Remember not to call this in a lock condition or you'll potentially suffer starvation. */ |