mirror of
https://github.com/jart/cosmopolitan.git
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64 lines
3.1 KiB
C
64 lines
3.1 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/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/nt/enum/accessmask.h"
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#include "libc/nt/enum/fileflagandattributes.h"
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#include "libc/nt/enum/filesharemode.h"
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#include "libc/nt/files.h"
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#include "libc/sysv/consts/f.h"
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#include "libc/sysv/consts/fd.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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textwindows int sys_fcntl_nt(int fd, int cmd, unsigned arg) {
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uint32_t flags;
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if (__isfdkind(fd, kFdFile) || __isfdkind(fd, kFdSocket)) {
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switch (cmd) {
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case F_GETFL:
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return g_fds.p[fd].flags & (O_ACCMODE | O_APPEND | O_ASYNC | O_DIRECT |
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O_NOATIME | O_NONBLOCK);
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case F_SETFL:
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/*
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* - O_APPEND doesn't appear to be tunable at cursory glance
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* - O_NONBLOCK might require we start doing all i/o in threads
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* - O_DSYNC / O_RSYNC / O_SYNC maybe if we fsync() everything
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*/
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return einval();
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case F_GETFD:
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if (g_fds.p[fd].flags & O_CLOEXEC) {
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return FD_CLOEXEC;
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} else {
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return 0;
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}
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case F_SETFD:
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if (arg & FD_CLOEXEC) {
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g_fds.p[fd].flags |= O_CLOEXEC;
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return FD_CLOEXEC;
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} else {
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g_fds.p[fd].flags &= ~O_CLOEXEC;
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return 0;
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}
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default:
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return einval();
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}
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} else {
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return ebadf();
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}
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}
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