125 lines
6.0 KiB
C
125 lines
6.0 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/ntmagicpaths.h"
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#include "libc/nexgen32e/tinystrcmp.h"
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#include "libc/nt/createfile.h"
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#include "libc/nt/enum/filesharemode.h"
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#include "libc/nt/enum/filetype.h"
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#include "libc/nt/enum/fsctl.h"
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#include "libc/nt/errors.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/sysv/consts/fileno.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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static textwindows int64_t open$nt$impl(const char *file, uint32_t flags,
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int32_t mode) {
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uint32_t br;
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int64_t handle;
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char16_t file16[PATH_MAX];
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if (mkntpath2(file, flags, file16) == -1) return -1;
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if ((handle = CreateFile(
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file16,
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(flags & 0xf000000f) | (/* this is needed if we mmap(rwx+cow)
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nt is choosy about open() access */
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kNtGenericExecute | kNtFileGenericWrite),
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(flags & O_EXCL)
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? kNtFileShareExclusive
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: kNtFileShareRead | kNtFileShareWrite | kNtFileShareDelete,
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(flags & O_CLOEXEC) ? &kNtIsInheritable : NULL,
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(flags & O_CREAT) && (flags & O_EXCL)
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? kNtCreateNew
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: (flags & O_CREAT) && (flags & O_TRUNC)
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? kNtCreateAlways
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: (flags & O_CREAT)
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? kNtOpenAlways
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: (flags & O_TRUNC) ? kNtTruncateExisting
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: kNtOpenExisting,
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/* TODO(jart): Should we just always set overlapped? */
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(/* note: content indexer demolishes unix-ey i/o performance */
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kNtFileAttributeNotContentIndexed | kNtFileAttributeNormal |
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(((flags & ((kNtFileFlagWriteThrough | kNtFileFlagOverlapped |
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kNtFileFlagNoBuffering | kNtFileFlagRandomAccess) >>
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8))
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<< 8) |
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(flags & (kNtFileFlagSequentialScan | kNtFileFlagDeleteOnClose |
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kNtFileFlagBackupSemantics | kNtFileFlagPosixSemantics |
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kNtFileAttributeTemporary)))),
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0)) != -1) {
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if (flags & O_SPARSE) {
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/*
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* TODO(jart): Can all files be sparse files? That seems to be the
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* way Linux behaves out of the box.
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* TODO(jart): Wow why does sparse wreak havoc?
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*/
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DeviceIoControl(handle, kNtFsctlSetSparse, NULL, 0, NULL, 0, &br, NULL);
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}
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}
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return handle;
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}
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static textwindows ssize_t open$nt$console(const struct NtMagicPaths *mp,
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uint32_t flags, int32_t mode,
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size_t fd) {
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if (GetFileType(g_fds.p[STDIN_FILENO].handle) == kNtFileTypeChar &&
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GetFileType(g_fds.p[STDOUT_FILENO].handle) == kNtFileTypeChar) {
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g_fds.p[fd].handle = g_fds.p[STDIN_FILENO].handle;
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g_fds.p[fd].extra = g_fds.p[STDOUT_FILENO].handle;
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} else if ((g_fds.p[fd].handle = open$nt$impl(
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mp->conin, (flags & ~O_ACCMODE) | O_RDONLY, mode)) != -1) {
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g_fds.p[fd].extra =
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open$nt$impl(mp->conout, (flags & ~O_ACCMODE) | O_WRONLY, mode);
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assert(g_fds.p[fd].extra != -1);
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} else {
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return winerr();
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}
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g_fds.p[fd].kind = kFdConsole;
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g_fds.p[fd].flags = flags;
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return fd;
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}
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static textwindows ssize_t open$nt$file(const char *file, uint32_t flags,
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int32_t mode, size_t fd) {
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if ((g_fds.p[fd].handle = open$nt$impl(file, flags, mode)) != -1) {
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g_fds.p[fd].kind = kFdFile;
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g_fds.p[fd].flags = flags;
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return fd;
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} else if (GetLastError() == kNtErrorFileExists &&
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((flags & O_CREAT) && (flags & O_TRUNC))) {
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return eisdir();
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} else {
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return winerr();
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}
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}
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textwindows ssize_t open$nt(const char *file, uint32_t flags, int32_t mode) {
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size_t fd;
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if ((fd = createfd()) == -1) return -1;
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if ((flags & O_ACCMODE) == O_RDWR &&
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tinystrcmp(file, kNtMagicPaths.devtty) == 0) {
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return open$nt$console(&kNtMagicPaths, flags, mode, fd);
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} else {
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return open$nt$file(file, flags, mode, fd);
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}
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}
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