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https://github.com/jart/cosmopolitan.git
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d2f49ca175
Our makefile generator now accepts badly formatted include lines. It's now more hermetic with better error checking in the cosmo repo, and it can be configured to not be hermetic at all.
92 lines
4.8 KiB
C
92 lines
4.8 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 2022 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/nt/createfile.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/enum/accessmask.h"
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#include "libc/nt/enum/creationdisposition.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/synchronization.h"
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#include "libc/nt/thunk/msabi.h"
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__msabi extern typeof(CreateFile) *const __imp_CreateFileW;
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__msabi extern typeof(GetLastError) *const __imp_GetLastError;
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__msabi extern typeof(Sleep) *const __imp_Sleep;
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/**
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* Opens file on the New Technology.
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*
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* @return handle, or -1 on failure w/ `errno` set appropriately
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* @note this wrapper takes care of ABI, STRACE(), and __winerr()
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*/
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textwindows int64_t
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CreateFile(const char16_t *lpFileName, //
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uint32_t dwDesiredAccess, //
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uint32_t dwShareMode, //
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const struct NtSecurityAttributes *opt_lpSecurity, //
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int dwCreationDisposition, //
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uint32_t dwFlagsAndAttributes, //
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int64_t opt_hTemplateFile) {
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int64_t hHandle;
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uint32_t micros = 1;
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char buf_accessflags[512];
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char buf_shareflags[64];
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char buf_secattr[32];
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char buf_flagattr[256];
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TryAgain:
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hHandle = __imp_CreateFileW(lpFileName, dwDesiredAccess, dwShareMode,
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opt_lpSecurity, dwCreationDisposition,
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dwFlagsAndAttributes, opt_hTemplateFile);
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NTTRACE("CreateFile(%#hs, %s, %s, %s, %s, %s, %ld) → {%ld, %d}", lpFileName,
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(DescribeNtFileAccessFlags)(buf_accessflags, dwDesiredAccess),
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(DescribeNtFileShareFlags)(buf_shareflags, dwShareMode),
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(DescribeNtSecurityAttributes)(buf_secattr, opt_lpSecurity),
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DescribeNtCreationDisposition(dwCreationDisposition),
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(DescribeNtFileFlagAttr)(buf_flagattr, dwFlagsAndAttributes),
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opt_hTemplateFile, hHandle, __imp_GetLastError());
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if (hHandle == -1) {
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switch (__imp_GetLastError()) {
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case kNtErrorPipeBusy:
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if (micros >= 1024) __imp_Sleep(micros / 1024);
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if (micros < 1024 * 1024) micros <<= 1;
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goto TryAgain;
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case kNtErrorAccessDenied:
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// GetNtOpenFlags() always greedily requests execute permissions
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// because the POSIX flag O_EXEC doesn't mean the same thing. It
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// seems however this causes the opening of certain files to not
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// work, possibly due to Windows Defender or some security thing
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// In that case, we'll cross our fingers the file isn't a binary
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if ((dwDesiredAccess & kNtGenericExecute) &&
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(dwCreationDisposition == kNtOpenExisting ||
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dwCreationDisposition == kNtTruncateExisting)) {
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NTTRACE("CreateFile removed kNtGenericExecute");
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dwDesiredAccess &= ~kNtGenericExecute;
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goto TryAgain;
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}
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break;
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default:
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break;
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}
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__winerr();
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}
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return hHandle;
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}
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