Cory McWilliams
79022e1e1f
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3621 ed5197a5-7fde-0310-b194-c3ffbd925b24
124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/* Copyright libuv contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "uv.h"
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#include "uv-common.h"
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#ifdef _WIN32
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# include "win/internal.h"
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#else
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# include "unix/internal.h"
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#endif
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static int uv__random(void* buf, size_t buflen) {
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int rc;
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#if defined(__PASE__)
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rc = uv__random_readpath("/dev/urandom", buf, buflen);
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#elif defined(_AIX) || defined(__QNX__)
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rc = uv__random_readpath("/dev/random", buf, buflen);
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#elif defined(__APPLE__) || defined(__OpenBSD__) || \
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(defined(__ANDROID_API__) && __ANDROID_API__ >= 28)
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rc = uv__random_getentropy(buf, buflen);
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if (rc == UV_ENOSYS)
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rc = uv__random_devurandom(buf, buflen);
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#elif defined(__NetBSD__)
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rc = uv__random_sysctl(buf, buflen);
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#elif defined(__FreeBSD__) || defined(__linux__)
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rc = uv__random_getrandom(buf, buflen);
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if (rc == UV_ENOSYS)
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rc = uv__random_devurandom(buf, buflen);
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# if defined(__linux__)
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switch (rc) {
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case UV_EACCES:
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case UV_EIO:
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case UV_ELOOP:
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case UV_EMFILE:
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case UV_ENFILE:
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case UV_ENOENT:
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case UV_EPERM:
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rc = uv__random_sysctl(buf, buflen);
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break;
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}
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# endif
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#elif defined(_WIN32)
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uv__once_init();
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rc = uv__random_rtlgenrandom(buf, buflen);
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#else
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rc = uv__random_devurandom(buf, buflen);
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#endif
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return rc;
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}
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static void uv__random_work(struct uv__work* w) {
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uv_random_t* req;
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req = container_of(w, uv_random_t, work_req);
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req->status = uv__random(req->buf, req->buflen);
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}
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static void uv__random_done(struct uv__work* w, int status) {
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uv_random_t* req;
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req = container_of(w, uv_random_t, work_req);
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uv__req_unregister(req->loop, req);
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if (status == 0)
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status = req->status;
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req->cb(req, status, req->buf, req->buflen);
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}
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int uv_random(uv_loop_t* loop,
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uv_random_t* req,
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void *buf,
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size_t buflen,
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unsigned flags,
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uv_random_cb cb) {
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if (buflen > 0x7FFFFFFFu)
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return UV_E2BIG;
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if (flags != 0)
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return UV_EINVAL;
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if (cb == NULL)
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return uv__random(buf, buflen);
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uv__req_init(loop, req, UV_RANDOM);
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req->loop = loop;
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req->status = 0;
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req->cb = cb;
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req->buf = buf;
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req->buflen = buflen;
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uv__work_submit(loop,
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&req->work_req,
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UV__WORK_CPU,
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uv__random_work,
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uv__random_done);
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return 0;
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}
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