mirror of
https://github.com/jart/cosmopolitan.git
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83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/calls/struct/sigset.h"
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#include "libc/calls/struct/sigset.internal.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/popcnt.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/limits.h"
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#include "libc/sysv/consts/sig.h"
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#define N 128
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#define append(...) o += ksnprintf(buf + o, N - o, __VA_ARGS__)
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const char *_DescribeSigset(char buf[N], int rc, const sigset_t *ss) {
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int olderr;
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bool gotsome;
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const char *s;
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int sig, o = 0;
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sigset_t sigset;
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if (rc == -1)
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return "n/a";
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if (!ss)
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return "NULL";
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if (kisdangerous(ss)) {
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ksnprintf(buf, N, "%p", ss);
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return buf;
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}
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olderr = errno;
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if (sigcountset(ss) > 16) {
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append("~");
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sigemptyset(&sigset);
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for (sig = 1; sig <= _NSIG; ++sig) {
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if (!sigismember(ss, sig)) {
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sigaddset(&sigset, sig);
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}
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}
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} else {
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sigset = *ss;
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}
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append("{");
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gotsome = false;
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for (sig = 1; sig <= _NSIG; ++sig) {
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if (sigismember(&sigset, sig) > 0) {
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if (gotsome) {
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append(",");
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} else {
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gotsome = true;
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}
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s = strsignal(sig);
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if (s[0] == 'S' && s[1] == 'I' && s[2] == 'G') {
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s += 3;
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}
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append("%s", s);
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}
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}
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append("}");
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errno = olderr;
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return buf;
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}
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