mirror of
https://github.com/jart/cosmopolitan.git
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b76b2be2d0
readdir() will now always yield an inode that's consistent with stat() on ZipOS and Windows in general. More APIs have been updated to return the appropriate error code when inappropriately trying to do ops, like sockets, with a zip file descriptor. The path normalization algorithms are now fully fleshed out. Some socket APIs have been fixed so they'll raise EBADF vs. ENOTSOCK appropriately. Lastly seekdir() will now work properly on NetBSD and FreeBSD (not sure why anyone would even use it)
73 lines
3.4 KiB
C
73 lines
3.4 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 2021 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/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/calls/syscall_support-nt.internal.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/nt/comms.h"
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#include "libc/sysv/errfuns.h"
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#define TCSBRK 0x5409 // linux
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#define TIOCSBRK 0x2000747b // bsd
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#define TIOCCBRK 0x2000747a // bsd
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static int sys_tcsendbreak_bsd(int fd) {
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if (sys_ioctl(fd, TIOCSBRK, 0) == -1) return -1;
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usleep(400000);
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if (sys_ioctl(fd, TIOCCBRK, 0) == -1) return -1;
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return 0;
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}
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static textwindows int sys_tcsendbreak_nt(int fd) {
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if (!__isfdopen(fd)) return ebadf();
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if (!TransmitCommChar(g_fds.p[fd].handle, '\0')) return __winerr();
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return 0;
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}
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/**
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* Sends break.
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*
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* @param fd is file descriptor of tty
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* @param duration of 0 sends a break for 0.25-0.5 seconds, and other
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* durations are treated the same by this implementation
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* @raise EBADF if `fd` isn't an open file descriptor
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* @raise ENOTTY if `fd` is open but not a teletypewriter
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* @raise EIO if process group of writer is orphoned, calling thread is
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* not blocking `SIGTTOU`, and process isn't ignoring `SIGTTOU`
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* @raise ENOSYS on bare metal
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* @asyncsignalsafe
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*/
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int tcsendbreak(int fd, int duration) {
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int rc;
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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, TCSBRK, 0);
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} else if (IsBsd()) {
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rc = sys_tcsendbreak_bsd(fd);
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} else if (IsWindows()) {
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rc = sys_tcsendbreak_nt(fd);
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} else {
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rc = enosys();
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}
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STRACE("tcsendbreak(%d, %u) → %d% m", fd, duration, rc);
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return rc;
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}
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