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getentropy() only returns 0 or -1 and is atomic

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This commit is contained in:
Frank Denis 2019-03-26 15:06:36 +01:00
parent 0299203305
commit 015dfe9978
1 changed files with 4 additions and 7 deletions
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11
src/libsodium/randombytes/internal/randombytes_internal_random.c
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@ -178,14 +178,11 @@ randombytes_internal_random_init(void)
static int static int
_randombytes_getentropy(void * const buf, const size_t size) _randombytes_getentropy(void * const buf, const size_t size)
{ {
int readnb;
assert(size <= 256U); assert(size <= 256U);
do { if (getentropy(buf, size) != 0) {
readnb = getentropy(buf, size); return -1;
} while (readnb < 0 && (errno == EINTR || errno == EAGAIN)); }
return 0;
return (readnb == (int) size) - 1;
} }
static int static int