mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 23:13:34 +00:00
0c5dd7b342
- Improved async signal safety of read() particularly for longjmp() - Started adding cancel cleanup handlers for locks / etc on Windows - Make /dev/tty work better particularly for uses like `foo | less` - Eagerly read console input into a linked list, so poll can signal - Fix some libc definitional bugs, which configure scripts detected
83 lines
3.5 KiB
C
83 lines
3.5 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/errno.h"
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#include "libc/intrin/atomic.h"
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#include "libc/intrin/dll.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/runtime.h"
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#include "libc/proc/proc.internal.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/thread/thread.h"
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#include "libc/thread/tls.h"
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#ifdef __x86_64__
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static textwindows int sys_kill_nt_impl(int pid, int sig) {
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int err;
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bool32 ok;
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struct Dll *e;
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struct Proc *pr = 0;
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for (e = dll_first(__proc.list); e; e = dll_next(__proc.list, e)) {
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if (pid == PROC_CONTAINER(e)->pid) {
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pr = PROC_CONTAINER(e);
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}
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}
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if (!pr) {
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return esrch();
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}
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if (sig) {
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err = errno;
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ok = TerminateProcess(pr->handle, sig);
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if (!ok && GetLastError() == kNtErrorAccessDenied) {
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ok = true; // cargo culting other codebases here
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errno = err;
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}
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}
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return ok ? 0 : -1;
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}
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textwindows int sys_kill_nt(int pid, int sig) {
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if (!(0 <= sig && sig <= 64)) return einval();
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// XXX: NT doesn't really have process groups. For instance the
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// CreateProcess() flag for starting a process group actually
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// just does an "ignore ctrl-c" internally.
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if (pid < -1) pid = -pid;
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if (pid == -1) return einval(); // no support for kill all yet
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// If we're targeting current process group then just call raise().
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if (pid <= 0 || pid == getpid()) {
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if (!sig) return 0; // ability check passes
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return raise(sig);
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}
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int rc;
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uint64_t m;
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m = atomic_exchange(&__get_tls()->tib_sigmask, -1);
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__proc_lock();
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pthread_cleanup_push((void *)__proc_unlock, 0);
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rc = sys_kill_nt_impl(pid, sig);
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pthread_cleanup_pop(true);
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atomic_store_explicit(&__get_tls()->tib_sigmask, m, memory_order_release);
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return rc;
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}
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#endif /* __x86_64__ */
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