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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
99 lines
4 KiB
C
99 lines
4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/createfileflags.internal.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/sig.internal.h"
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#include "libc/calls/state.internal.h"
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#include "libc/calls/struct/sigset.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/nt/createfile.h"
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#include "libc/nt/enum/fileflagandattributes.h"
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#include "libc/nt/enum/filetype.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/madv.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 int sys_fadvise_nt_impl(int fd, uint64_t offset,
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uint64_t len, int advice) {
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int64_t h1, h2;
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int rc, flags, mode;
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uint32_t perm, share, attr;
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if ((int64_t)len < 0) return einval();
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if (!__isfdkind(fd, kFdFile)) return ebadf();
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h1 = g_fds.p[fd].handle;
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mode = g_fds.p[fd].mode;
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flags = g_fds.p[fd].flags;
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flags &= ~(_O_SEQUENTIAL | _O_RANDOM);
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switch (advice) {
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case MADV_NORMAL:
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break;
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case MADV_RANDOM:
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flags |= _O_RANDOM;
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break;
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case MADV_WILLNEED:
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case MADV_SEQUENTIAL:
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flags |= _O_SEQUENTIAL;
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break;
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default:
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return einval();
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}
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if (GetNtOpenFlags(flags, mode, &perm, &share, 0, &attr) == -1) {
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return -1;
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}
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if (GetFileType(h1) == kNtFileTypePipe) {
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return espipe();
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}
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// MSDN says only these are allowed, otherwise it returns EINVAL.
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attr &= kNtFileFlagBackupSemantics | kNtFileFlagDeleteOnClose |
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kNtFileFlagNoBuffering | kNtFileFlagOpenNoRecall |
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kNtFileFlagOpenReparsePoint | kNtFileFlagOverlapped |
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kNtFileFlagPosixSemantics | kNtFileFlagRandomAccess |
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kNtFileFlagSequentialScan | kNtFileFlagWriteThrough;
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__fds_lock();
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if ((h2 = ReOpenFile(h1, perm, share, attr)) != -1) {
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if (h2 != h1) {
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CloseHandle(h1);
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g_fds.p[fd].handle = h2;
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}
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g_fds.p[fd].flags = flags;
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rc = 0;
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} else {
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rc = __winerr();
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}
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__fds_unlock();
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return rc;
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}
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textwindows int sys_fadvise_nt(int fd, uint64_t offset, uint64_t len,
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int advice) {
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int rc;
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BLOCK_SIGNALS;
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rc = sys_fadvise_nt_impl(fd, offset, len, advice);
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ALLOW_SIGNALS;
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return rc;
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}
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