mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
f7ff77d865
- Invent iso8601us() for faster timestamps - Improve --strace descriptions of sigset_t - Rebuild the Landlock Make bootstrap binary - Introduce MODE=sysv for non-Windows builds - Permit OFD fcntl() locks under pledge(flock) - redbean can now protect your kernel from ddos - Have vfork() fallback to sys_fork() not fork() - Change kmalloc() to not die when out of memory - Improve documentation for some termios functions - Rewrite putenv() and friends to conform to POSIX - Fix linenoise + strace verbosity issue on Windows - Fix regressions in our ability to show backtraces - Change redbean SetHeader() to no-op if value is nil - Improve fcntl() so SQLite locks work in non-WAL mode - Remove some unnecessary work during fork() on Windows - Create redbean-based SSL reverse proxy for IPv4 TurfWar - Fix ape/apeinstall.sh warning when using non-bash shells - Add ProgramTrustedIp(), and IsTrustedIp() APIs to redbean - Support $PWD, $UID, $GID, and $EUID in command interpreter - Introduce experimental JTqFpD APE prefix for non-Windows builds - Invent blackhole daemon for firewalling IP addresses via UNIX named socket - Add ProgramTokenBucket(), AcquireToken(), and CountTokens() APIs to redbean
85 lines
3.8 KiB
C
85 lines
3.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2021 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/syscall-nt.internal.h"
|
|
#include "libc/calls/syscall-sysv.internal.h"
|
|
#include "libc/calls/syscall_support-nt.internal.h"
|
|
#include "libc/calls/termios.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/fmt/itoa.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/mem/alloca.h"
|
|
#include "libc/nt/comms.h"
|
|
#include "libc/sysv/consts/termios.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
#define kNtPurgeTxclear 4
|
|
#define kNtPurgeRxclear 8
|
|
|
|
static const char *DescribeFlush(char buf[12], int action) {
|
|
if (action == TCIFLUSH) return "TCIFLUSH";
|
|
if (action == TCOFLUSH) return "TCOFLUSH";
|
|
if (action == TCIOFLUSH) return "TCIOFLUSH";
|
|
FormatInt32(buf, action);
|
|
return buf;
|
|
}
|
|
|
|
static dontinline textwindows int sys_tcflush_nt(int fd, int queue) {
|
|
bool32 ok;
|
|
int64_t h;
|
|
if (!__isfdopen(fd)) return ebadf();
|
|
ok = true;
|
|
h = g_fds.p[fd].handle;
|
|
if (queue == TCIFLUSH || queue == TCIOFLUSH) {
|
|
ok &= !!PurgeComm(h, kNtPurgeRxclear);
|
|
}
|
|
if (queue == TCOFLUSH || queue == TCIOFLUSH) {
|
|
ok &= !!PurgeComm(h, kNtPurgeTxclear);
|
|
}
|
|
return ok ? 0 : __winerr();
|
|
}
|
|
|
|
/**
|
|
* Discards queued data on teletypewriter.
|
|
*
|
|
* @param queue may be one of:
|
|
* - `TCIFLUSH` flushes data received but not read
|
|
* - `TCOFLUSH` flushes data written but not transmitted
|
|
* - `TCIOFLUSH` does both `TCOFLUSH` and `TCIFLUSH`
|
|
* @return 0 on success, or -1 w/ errno
|
|
* @raise EINVAL if `action` is invalid
|
|
* @raise EBADF if `fd` isn't an open file descriptor
|
|
* @raise ENOTTY if `fd` is open but not a teletypewriter
|
|
* @raise EIO if process group of writer is orphoned, calling thread is
|
|
* not blocking `SIGTTOU`, and process isn't ignoring `SIGTTOU`
|
|
* @raise ENOSYS on bare metal
|
|
* @asyncsignalsafe
|
|
*/
|
|
int tcflush(int fd, int queue) {
|
|
int rc;
|
|
if (IsMetal()) {
|
|
rc = enosys();
|
|
} else if (!IsWindows()) {
|
|
rc = sys_ioctl(fd, TCFLSH, queue);
|
|
} else {
|
|
rc = sys_tcflush_nt(fd, queue);
|
|
}
|
|
STRACE("tcflush(%d, %s) → %d% m", fd, DescribeFlush(alloca(12), queue), rc);
|
|
return rc;
|
|
}
|