mirror of
https://github.com/jart/cosmopolitan.git
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7e0a09feec
This change ports APE Loader to Linux AARCH64, so that Raspberry Pi users can run programs like redbean, without the executable needing to modify itself. Progress has also slipped into this change on the issue of making progress better conforming to user expectations and industry standards regarding which symbols we're allowed to declare
105 lines
4.4 KiB
C
105 lines
4.4 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/assert.h"
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#include "libc/calls/blockcancel.internal.h"
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#include "libc/calls/calls.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/winsize.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/syscall_support-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/intrin/asan.internal.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/log/rop.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/pty.h"
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#include "libc/sysv/consts/termios.h"
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#include "libc/sysv/errfuns.h"
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#define PTMGET 0x40287401 // openbsd
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struct IoctlPtmGet {
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int m;
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int s;
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char mname[16];
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char sname[16];
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};
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static int openpty_impl(int *mfd, int *sfd, char *name,
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const struct termios *tio, //
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const struct winsize *wsz) {
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int m, s, p;
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struct IoctlPtmGet t;
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RETURN_ON_ERROR((m = posix_openpt(O_RDWR | O_NOCTTY)));
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if (!IsOpenbsd()) {
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RETURN_ON_ERROR(grantpt(m));
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RETURN_ON_ERROR(unlockpt(m));
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RETURN_ON_ERROR(_ptsname(m, t.sname, sizeof(t.sname)));
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RETURN_ON_ERROR((s = sys_openat(AT_FDCWD, t.sname, O_RDWR, 0)));
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} else {
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RETURN_ON_ERROR(sys_ioctl(m, PTMGET, &t));
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close(m);
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m = t.m;
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s = t.s;
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}
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*mfd = m;
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*sfd = s;
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if (name) strcpy(name, t.sname);
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if (tio) npassert(!tcsetattr(s, TCSAFLUSH, tio));
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if (wsz) npassert(!tcgetwinsize(s, wsz));
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return 0;
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OnError:
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if (m != -1) sys_close(m);
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return -1;
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}
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/**
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* Opens new pseudo teletypewriter.
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*
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* @param mfd receives controlling tty rw fd on success
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* @param sfd receives subordinate tty rw fd on success
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* @param tio may be passed to tune a century of legacy behaviors
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* @param wsz may be passed to set terminal display dimensions
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* @params flags is usually O_RDWR|O_NOCTTY
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* @return 0 on success, or -1 w/ errno
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*/
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int openpty(int *mfd, int *sfd, char *name, //
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const struct termios *tio, //
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const struct winsize *wsz) {
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int rc;
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if (IsWindows() || IsMetal()) {
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return enosys();
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}
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if (IsAsan() && (!__asan_is_valid(mfd, sizeof(int)) ||
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!__asan_is_valid(sfd, sizeof(int)) ||
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(name && !__asan_is_valid(name, 16)) ||
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(tio && !__asan_is_valid(tio, sizeof(*tio))) ||
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(wsz && !__asan_is_valid(wsz, sizeof(*wsz))))) {
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return efault();
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}
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BLOCK_CANCELLATIONS;
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rc = openpty_impl(mfd, sfd, name, tio, wsz);
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ALLOW_CANCELLATIONS;
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return rc;
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}
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