61 lines
2.9 KiB
C
61 lines
2.9 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/bits/weaken.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/macros.h"
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#include "libc/sock/internal.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/zipos/zipos.internal.h"
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/**
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* Closes file descriptor.
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*
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* This function may be used for file descriptors returned by socket,
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* accept, epoll_create, and zipos file descriptors too.
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*
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* @return 0 on success, or -1 w/ errno
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* @asyncsignalsafe
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* @syscall
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*/
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int close(int fd) {
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int rc;
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if (fd < 0) return einval();
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if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
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rc = weaken(__zipos_close)(fd);
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} else if (fd < g_fds.n && g_fds.p[fd].kind == kFdEpoll) {
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rc = weaken(close$epoll)(fd);
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} else if (!IsWindows()) {
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rc = close$sysv(fd);
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} else if (fd < g_fds.n && g_fds.p[fd].kind == kFdSocket) {
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rc = weaken(closesocket$nt)(fd);
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} else if (fd < g_fds.n &&
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(g_fds.p[fd].kind == kFdFile || g_fds.p[fd].kind == kFdConsole ||
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g_fds.p[fd].kind == kFdProcess)) {
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rc = close$nt(fd);
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} else {
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rc = ebadf();
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}
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if (fd < g_fds.n) {
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g_fds.p[fd].kind = kFdEmpty;
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g_fds.f = MIN(g_fds.f, fd);
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}
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return rc;
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}
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