mirror of
https://github.com/jart/cosmopolitan.git
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94 lines
3.8 KiB
C
94 lines
3.8 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/ioctl.h"
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#include "libc/calls/struct/metatermios.internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/termios.internal.h"
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#include "libc/calls/ttydefaults.h"
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#include "libc/dce.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/str/str.h"
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#include "libc/sysv/consts/termios.h"
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#include "libc/sysv/errfuns.h"
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int ioctl_tcgets_nt(int, struct termios *) _Hide;
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static int ioctl_tcgets_metal(int fd, struct termios *tio) {
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bzero(tio, sizeof(*tio));
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tio->c_iflag = TTYDEF_IFLAG;
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tio->c_oflag = TTYDEF_OFLAG;
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tio->c_lflag = TTYDEF_LFLAG;
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tio->c_cflag = TTYDEF_CFLAG;
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return 0;
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}
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static int ioctl_tcgets_sysv(int fd, struct termios *tio) {
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int rc;
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union metatermios mt;
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if (IsLinux()) {
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if (IsAsan() && !__asan_is_valid(tio, sizeof(*tio))) return efault();
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return sys_ioctl(fd, TCGETS, tio);
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} else {
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if ((rc = sys_ioctl(fd, TCGETS, &mt)) != -1) {
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if (IsXnu()) {
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COPY_TERMIOS(tio, &mt.xnu);
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} else if (IsFreebsd() || IsOpenbsd() || IsNetbsd()) {
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COPY_TERMIOS(tio, &mt.bsd);
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} else {
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unreachable;
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}
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}
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return rc;
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}
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}
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/**
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* Returns information about terminal.
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*
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* @see tcgetattr(fd, tio) dispatches here
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* @see ioctl(fd, TCGETS, tio) dispatches here
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* @see ioctl(fd, TIOCGETA, tio) dispatches here
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*/
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int ioctl_tcgets(int fd, ...) {
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int rc;
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va_list va;
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struct termios *tio;
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va_start(va, fd);
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tio = va_arg(va, struct termios *);
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va_end(va);
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if (fd >= 0) {
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if (!tio || (IsAsan() && !__asan_is_valid(tio, sizeof(*tio)))) {
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rc = efault();
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} else if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
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rc = enotty();
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} else if (IsMetal()) {
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rc = ioctl_tcgets_metal(fd, tio);
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} else if (!IsWindows()) {
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rc = ioctl_tcgets_sysv(fd, tio);
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} else {
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rc = ioctl_tcgets_nt(fd, tio);
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}
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} else {
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rc = einval();
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}
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STRACE("ioctl_tcgets(%d, %p) → %d% m", fd, tio, rc);
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return rc;
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}
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