mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
99 lines
3.9 KiB
C
99 lines
3.9 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/calls/internal.h"
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#include "libc/calls/struct/metatermios.internal.h"
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#include "libc/calls/struct/termios.internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/termios.h"
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#include "libc/calls/termios.internal.h"
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#include "libc/dce.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/mem/alloca.h"
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#include "libc/sysv/consts/termios.h"
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#include "libc/sysv/errfuns.h"
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void __on_tcsetattr(int);
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int tcsetattr_nt(int, int, const struct termios *);
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static const char *DescribeTcsa(char buf[12], int opt) {
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if (opt == TCSANOW) return "TCSANOW";
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if (opt == TCSADRAIN) return "TCSADRAIN";
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if (opt == TCSAFLUSH) return "TCSAFLUSH";
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FormatInt32(buf, opt);
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return buf;
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}
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static int tcsetattr_impl(int fd, int opt, const struct termios *tio) {
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if (fd < 0) {
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return einval();
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}
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if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
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return enotty();
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}
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if (0 <= fd && fd <= 2 && _weaken(__on_tcsetattr)) {
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static bool once;
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if (!once) {
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_weaken(__on_tcsetattr)(fd);
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once = true;
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}
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}
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if (IsAsan() && !__asan_is_valid(tio, sizeof(*tio))) {
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return efault();
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}
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if (IsMetal()) {
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return 0;
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}
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if (IsWindows()) {
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return tcsetattr_nt(fd, opt, tio);
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}
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if (IsLinux() || IsBsd()) {
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union metatermios mt;
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return sys_ioctl(fd, TCSETS + opt, __termios2host(&mt, tio));
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}
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return enosys();
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}
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/**
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* Sets struct on teletypewriter w/ drains and flushes.
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*
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* @param fd open file descriptor that isatty()
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* @param opt can be:
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* - TCSANOW: sets console settings
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* - TCSADRAIN: drains output, and sets console settings
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* - TCSAFLUSH: drops input, drains output, and sets console settings
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* @return 0 on success, -1 w/ errno
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* @asyncsignalsafe
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*/
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int tcsetattr(int fd, int opt, const struct termios *tio) {
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int rc;
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rc = tcsetattr_impl(fd, opt, tio);
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STRACE("tcsetattr(%d, %s, %s) → %d% m", fd, DescribeTcsa(alloca(12), opt),
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DescribeTermios(0, tio), rc);
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return rc;
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}
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