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lib/libc/gen/arc4random.h
- This file was added.
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| /* $OpenBSD: arc4random.h,v 1.4 2015/01/15 06:57:18 deraadt Exp $ */ | |||||
| /* | |||||
| * Copyright (c) 1996, David Mazieres <dm@uun.org> | |||||
| * Copyright (c) 2008, Damien Miller <djm@openbsd.org> | |||||
| * Copyright (c) 2013, Markus Friedl <markus@openbsd.org> | |||||
| * Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org> | |||||
| * | |||||
| * Permission to use, copy, modify, and distribute this software for any | |||||
| * purpose with or without fee is hereby granted, provided that the above | |||||
| * copyright notice and this permission notice appear in all copies. | |||||
| * | |||||
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |||||
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |||||
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |||||
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |||||
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |||||
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |||||
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |||||
| * | |||||
| * $FreeBSD$ | |||||
| */ | |||||
| /* | |||||
| * Stub functions for portability. | |||||
| */ | |||||
| #include <sys/mman.h> | |||||
| #include <signal.h> | |||||
| static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER; | |||||
| #define _ARC4_LOCK() \ | |||||
| do { \ | |||||
| if (__isthreaded) \ | |||||
| _pthread_mutex_lock(&arc4random_mtx); \ | |||||
| } while (0) | |||||
| #define _ARC4_UNLOCK() \ | |||||
| do { \ | |||||
| if (__isthreaded) \ | |||||
| _pthread_mutex_unlock(&arc4random_mtx); \ | |||||
| } while (0) | |||||
| static inline void | |||||
| _getentropy_fail(void) | |||||
| { | |||||
| raise(SIGKILL); | |||||
| } | |||||
| static inline int | |||||
| _rs_allocate(struct _rs **rsp, struct _rsx **rsxp) | |||||
cem: How does this compile? Where are these structures defined? | |||||
delphijAuthorUnsubmitted Done Inline ActionsIn arc4random.c. Their intention is to put non-portable part of the code in arc4random.h so implementations keep minimal differences in arc4random.c. delphij: In arc4random.c. Their intention is to put non-portable part of the code in arc4random.h so… | |||||
cemUnsubmitted Not Done Inline ActionsHm. I am not really a fan of this pattern and it seems incorrect to name this a .h. It's not a header — it's just source that happens to be #included in the exactly one place it can be included. I'm not sure it's good to diverge from OpenBSD over that, but can we at least add a comment documenting the oddity of this "header" near the top of the file? E.g., something like, "This "header" is included exactly once in arc4random.c after necessary structure definitions. It is intended to contain the non-portable implementation details of arc4random.c." cem: Hm. I am not really a fan of this pattern and it seems incorrect to name this a .h. It's not… | |||||
| { | |||||
| struct { | |||||
| struct _rs rs; | |||||
| struct _rsx rsx; | |||||
| } *p; | |||||
| if ((p = mmap(NULL, sizeof(*p), PROT_READ|PROT_WRITE, | |||||
| MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) | |||||
| return (-1); | |||||
| if (minherit(p, sizeof(*p), INHERIT_ZERO) == -1) { | |||||
| munmap(p, sizeof(*p)); | |||||
| return (-1); | |||||
| } | |||||
| *rsp = &p->rs; | |||||
| *rsxp = &p->rsx; | |||||
| return (0); | |||||
| } | |||||
| static inline void | |||||
| _rs_forkdetect(void) | |||||
| { | |||||
| } | |||||
How does this compile? Where are these structures defined?