mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
c9fecf3a55
- You can now run `make -j8 toolchain` on Windows - You can now run `make -j` on MacOS ARM64 and BSD OSes - You can now use our Emacs dev environment on MacOS/Windows - Fix bug where the x16 register was being corrupted by --ftrace - The programs under build/bootstrap/ are updated as fat binaries - The Makefile now explains how to download cosmocc-0.0.12 toolchain - The build scripts under bin/ now support "cosmo" branded toolchains - stat() now goes faster on Windows (shaves 100ms off `make` latency) - Code cleanup and added review on the Windows signal checking code - posix_spawnattr_setrlimit() now works around MacOS ARM64 bugs - Landlock Make now favors posix_spawn() on non-Linux/OpenBSD - posix_spawn() now has better --strace logging on Windows - fstatat() can now avoid EACCES in more cases on Windows - fchmod() can now change the readonly bit on Windows
90 lines
3.8 KiB
C
90 lines
3.8 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 2023 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/struct/sigset.internal.h"
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#include "libc/intrin/bits.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/events.h"
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#include "libc/nt/files.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/struct/overlapped.h"
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#include "libc/str/str.h"
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#include "libc/str/tab.internal.h"
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#include "third_party/linenoise/linenoise.h"
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#define EXT(s) READ32LE(s "\0\0")
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static bool IsGraph(wint_t c) {
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return 0x21 <= c && c <= 0x7E;
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}
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static uint32_t GetFileExtension(const char16_t *s) {
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uint32_t w;
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size_t i, n;
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n = s ? strlen16(s) : 0;
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for (i = w = 0; n--;) {
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wint_t c = s[n];
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if (!IsGraph(c)) return 0;
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if (c == '.') break;
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if (++i > 4) return 0;
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w <<= 8;
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w |= kToLower[c];
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}
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return w;
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}
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// checks if file should be considered an executable on windows
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textwindows int IsWindowsExecutable(int64_t handle, const char16_t *path) {
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// fast path known file extensions
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// shaves away 100ms of gnu make latency in cosmo monorepo
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uint32_t ext;
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if (!IsTiny() && (ext = GetFileExtension(path))) {
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if (ext == EXT("c") || // c code
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ext == EXT("cc") || // c++ code
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ext == EXT("h") || // c/c++ header
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ext == EXT("s") || // assembly code
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ext == EXT("o")) { // object file
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return false;
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}
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if (ext == EXT("com") || // mz executable
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ext == EXT("exe") || // mz executable
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ext == EXT("sh")) { // bourne shells
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return true;
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}
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}
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// read first two bytes of file
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// access() and stat() aren't cancelation points
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bool ok;
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char buf[2];
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uint32_t got;
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BLOCK_SIGNALS;
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struct NtOverlapped overlap = {.hEvent = CreateEvent(0, 0, 0, 0)};
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ok = (ReadFile(handle, buf, 2, 0, &overlap) ||
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GetLastError() == kNtErrorIoPending) &&
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GetOverlappedResult(handle, &overlap, &got, true);
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CloseHandle(overlap.hEvent);
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ALLOW_SIGNALS;
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// it's an executable if it starts with `MZ` or `#!`
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return ok && got == 2 && //
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((buf[0] == 'M' && buf[1] == 'Z') || //
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(buf[0] == '#' && buf[1] == '!'));
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}
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