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random: getentropy on macOS does not need unistd.h

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Remove it. Make this change, so in a future commit, we can
combine #ifdefs, and avoid duplicate <sys/random.h> includes once we
switch to using getrandom directly.

Also remove the comment about macOS 10.12. We already require macOS >
10.15, so it is redundant.
This commit is contained in:
fanquake 2023-05-19 10:14:35 +01:00
parent 17acb2782a
commit c13c97dbf8
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2 changed files with 2 additions and 5 deletions
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4
configure.ac
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@ -1179,8 +1179,8 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>
[ AC_MSG_RESULT([no])]
)
AC_MSG_CHECKING([for getentropy via random.h])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>
AC_MSG_CHECKING([for getentropy via sys/random.h])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/random.h>]],
[[ getentropy(nullptr, 32) ]])],
[ AC_MSG_RESULT([yes]); AC_DEFINE([HAVE_GETENTROPY_RAND], [1], [Define this symbol if the BSD getentropy system call is available with sys/random.h]) ],

3
src/random.cpp
View file

@ -33,7 +33,6 @@
#include <linux/random.h>
#endif
#if defined(HAVE_GETENTROPY_RAND) && defined(MAC_OSX)
#include <unistd.h>
#include <sys/random.h>
#endif
#ifdef HAVE_SYSCTL_ARND
@ -314,8 +313,6 @@ void GetOSRand(unsigned char *ent32)
// Silence a compiler warning about unused function.
(void)GetDevURandom;
#elif defined(HAVE_GETENTROPY_RAND) && defined(MAC_OSX)
/* getentropy() is available on macOS 10.12 and later.
*/
if (getentropy(ent32, NUM_OS_RANDOM_BYTES) != 0) {
RandFailure();
}