mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
98909b1391
- Update a couple unicode data files - Disable strace during logger calls - SQLite now uses pread() / pwrite() - pread() past EOF on NT now returns 0 - Make the NT mmap() and fork() code elegant - Give NT a big performance boost with memory - Add many more mmap() tests to prove it works
44 lines
2.5 KiB
C
44 lines
2.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above 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 │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/calls/strace.internal.h"
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#include "libc/errno.h"
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#define __NR_dup3_linux 0x0124 /*RHEL5:CVE-2010-3301*/
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int32_t sys_dup3(int32_t oldfd, int32_t newfd, int flags) {
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static bool once, demodernize;
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int olderr, fd;
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if (!once) {
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olderr = errno;
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fd = __sys_dup3(oldfd, newfd, flags);
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if ((fd == -1 && errno == ENOSYS) || fd == __NR_dup3_linux) {
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STRACE("demodernizing %s() due to %s", "dup3", "RHEL5:CVE-2010-3301");
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demodernize = true;
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once = true;
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errno = olderr;
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} else {
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once = true;
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return fd;
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}
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} else if (!demodernize) {
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return __sys_dup3(oldfd, newfd, flags);
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}
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return __fixupnewfd(sys_dup2(oldfd, newfd), flags);
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}
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