45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
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/* Copyright (c) 2017, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#include <openssl/rand.h>
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#include <stdlib.h>
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#include "internal.h"
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/* g_buffering_enabled is true if fork-unsafe buffering has been enabled. */
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static int g_buffering_enabled = 0;
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/* g_lock protects |g_buffering_enabled|. */
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static struct CRYPTO_STATIC_MUTEX g_lock = CRYPTO_STATIC_MUTEX_INIT;
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void RAND_enable_fork_unsafe_buffering(int fd) {
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/* We no longer support setting the file-descriptor with this function. */
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if (fd != -1) {
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abort();
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}
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CRYPTO_STATIC_MUTEX_lock_write(&g_lock);
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g_buffering_enabled = 1;
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CRYPTO_STATIC_MUTEX_unlock_write(&g_lock);
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}
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int rand_fork_unsafe_buffering_enabled(void) {
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CRYPTO_STATIC_MUTEX_lock_read(&g_lock);
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const int ret = g_buffering_enabled;
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CRYPTO_STATIC_MUTEX_unlock_read(&g_lock);
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return ret;
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}
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