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d1d4388201
It hasn't been helpful enough to be justify the maintenance burden. What actually does help is mprotect(), kprintf(), --ftrace and --strace which can always be counted upon to work correctly. We aren't losing much with this change. Support for ASAN on AARCH64 was never implemented. Applying ASAN to the core libc runtimes was disabled many months ago. If there is some way to have an ASAN runtime for user programs that is less invasive we can potentially consider reintroducing support. But now is premature.
110 lines
4.3 KiB
C
110 lines
4.3 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/internal.h"
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#include "libc/calls/struct/metatermios.internal.h"
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#include "libc/calls/struct/termios.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.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/strace.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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int tcgetattr_nt(int, struct termios *);
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static int tcgetattr_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 tcgetattr_bsd(int fd, struct termios *tio) {
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int rc;
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union metatermios mt;
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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 {
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COPY_TERMIOS(tio, &mt.bsd);
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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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* Obtains the termios struct.
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*
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* Here are the approximate defaults you can expect across platforms:
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*
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* c_iflag = ICRNL IXON
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* c_oflag = OPOST ONLCR NL0 CR0 TAB0 BS0 VT0 FF0
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* c_cflag = ISIG CREAD CS8
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* c_lflag = ISIG ICANON ECHO ECHOE ECHOK IEXTEN ECHOCTL ECHOKE
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* cfgetispeed() = B38400
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* cfgetospeed() = B38400
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* c_cc[VINTR] = CTRL-C
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* c_cc[VQUIT] = CTRL-\ # ignore this comment
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* c_cc[VERASE] = CTRL-?
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* c_cc[VKILL] = CTRL-U
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* c_cc[VEOF] = CTRL-D
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* c_cc[VTIME] = CTRL-@
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* c_cc[VMIN] = CTRL-A
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* c_cc[VSTART] = CTRL-Q
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* c_cc[VSTOP] = CTRL-S
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* c_cc[VSUSP] = CTRL-Z
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* c_cc[VEOL] = CTRL-@
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* c_cc[VSWTC] = CTRL-@
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* c_cc[VREPRINT] = CTRL-R
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* c_cc[VDISCARD] = CTRL-O
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* c_cc[VWERASE] = CTRL-W
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* c_cc[VLNEXT] = CTRL-V
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* c_cc[VEOL2] = CTRL-@
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*
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* @param fd open file descriptor that isatty()
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* @param tio is where result is stored
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* @return 0 on success, or -1 w/ errno
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* @asyncsignalsafe
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*/
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int tcgetattr(int fd, struct termios *tio) {
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int rc;
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if (fd < 0) {
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rc = einval();
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} else if (!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 (IsLinux()) {
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rc = sys_ioctl(fd, TCGETS, tio);
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} else if (IsBsd()) {
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rc = tcgetattr_bsd(fd, tio);
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} else if (IsMetal()) {
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rc = tcgetattr_metal(fd, tio);
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} else if (IsWindows()) {
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rc = tcgetattr_nt(fd, tio);
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} else {
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rc = enosys();
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}
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STRACE("tcgetattr(%d, [%s]) → %d% m", fd, DescribeTermios(rc, tio), rc);
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return rc;
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}
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