mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 23:13:34 +00:00
281a0f2730
You can now call functions like fork() from Lua and it'll work across
all supported platforms, including Windows. This gives you a level of
control of the system that Lua traditionally hasn't been able to have
due to its focus on old portable stdio rather modern POSIX APIs. Demo
code has been added to redbean-demo.com to show how it works.
This change also modifies Lua so that integer literals with a leading
zero will be interpreted as octal. That should help avoid shooting in
the foot with POSIX APIs that frequently use octal mode bits.
This change fixes a bug in opendir(".") on New Technology.
Lastly, redbean will now serve crash reports to private network IPs.
This is consistent with other frameworks. However that isn't served
to public IPs unless the -E flag is passed to redbean at startup.
47 lines
2.6 KiB
C
47 lines
2.6 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 2020 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/calls.h"
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/strace.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
/**
|
|
* Duplicates file descriptor/handle.
|
|
*
|
|
* On Windows, we can't guarantee the desired file descriptor is used.
|
|
* We can however remap the standard handles (non-atomically) if their
|
|
* symbolic names are used.
|
|
*
|
|
* @param oldfd isn't closed afterwards
|
|
* @param newfd if already assigned, is silently closed beforehand;
|
|
* unless it's equal to oldfd, in which case dup2() is a no-op
|
|
* @param flags can have O_CLOEXEC
|
|
* @see dup(), dup2()
|
|
*/
|
|
int dup3(int oldfd, int newfd, int flags) {
|
|
int rc;
|
|
if (!IsWindows()) {
|
|
rc = sys_dup3(oldfd, newfd, flags);
|
|
} else {
|
|
rc = sys_dup_nt(oldfd, newfd, flags);
|
|
}
|
|
STRACE("dup3(%d, %d, %d) → %d% m", oldfd, newfd, flags, rc);
|
|
return rc;
|
|
}
|