69 lines
3.2 KiB
C
69 lines
3.2 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/bits/bits.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/sigbits.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/dce.h"
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#include "libc/log/log.h"
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#include "libc/macros.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/sa.h"
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#include "libc/sysv/consts/sig.h"
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/**
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* @fileoverview Default handlers for normal termination signals.
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* @note This gets linked when __cxa_atexit() is linked.
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* @see also libc/oncrash.c
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*/
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struct ucontext;
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struct siginfo;
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static const int sigs[] = {
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SIGHUP, /* hangup aka ctrl_close_event */
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SIGINT, /* ctrl+c aka ^C aka ETX aka \003 aka ♥ */
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SIGTERM /* kill (default signal) */
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};
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textexit static void __onkill(int sig, struct siginfo *si,
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struct ucontext *context) {
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/* https://www.tldp.org/LDP/abs/html/exitcodes.html */
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exit(128 + sig);
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unreachable;
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}
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/**
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* Installs default handlers for friendly kill signals.
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* @see showcrashreports()
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*/
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void callexitontermination(sigset_t *opt_out_exitsigs) {
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struct sigaction sa;
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if (opt_out_exitsigs) sigemptyset(opt_out_exitsigs);
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memset(&sa, 0, sizeof(sa));
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sa.sa_sigaction = __onkill;
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sa.sa_flags = SA_RESETHAND;
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for (unsigned i = 0; i < ARRAYLEN(sigs); ++i) {
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if (!sigs[i]) continue;
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if (opt_out_exitsigs) sigaddset(opt_out_exitsigs, sigs[i]);
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sigaction(sigs[i], &sa, NULL);
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}
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}
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