70 lines
3.3 KiB
C
70 lines
3.3 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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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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