mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
88 lines
3.6 KiB
C
88 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2021 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/struct/sigaction.h"
|
|
#include "libc/calls/struct/sigset.h"
|
|
#include "libc/calls/struct/sigset.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/describeflags.h"
|
|
#include "libc/intrin/kprintf.h"
|
|
#include "libc/macros.h"
|
|
#include "libc/mem/alloca.h"
|
|
#include "libc/sysv/consts/sa.h"
|
|
|
|
static const char *DescribeSigHandler(char buf[64], void f(int)) {
|
|
if (f == SIG_ERR)
|
|
return "SIG_ERR";
|
|
if (f == SIG_DFL)
|
|
return "SIG_DFL";
|
|
if (f == SIG_IGN)
|
|
return "SIG_IGN";
|
|
ksnprintf(buf, 64, "%t", f);
|
|
return buf;
|
|
}
|
|
|
|
static const char *DescribeSigFlags(char buf[64], int x) {
|
|
const struct DescribeFlags kSigFlags[] = {
|
|
{SA_NOCLDSTOP, "NOCLDSTOP"}, //
|
|
{SA_NOCLDWAIT, "NOCLDWAIT"}, //
|
|
{SA_SIGINFO, "SIGINFO"}, //
|
|
{SA_ONSTACK, "ONSTACK"}, //
|
|
{SA_RESTART, "RESTART"}, //
|
|
{SA_NODEFER, "NODEFER"}, //
|
|
{SA_RESETHAND, "RESETHAND"}, //
|
|
{SA_NOMASK, "NOMASK"}, //
|
|
{SA_ONESHOT, "ONESHOT"}, //
|
|
{0x04000000, "RESTORER"}, //
|
|
};
|
|
return _DescribeFlags(buf, 64, kSigFlags, ARRAYLEN(kSigFlags), "SA_", x);
|
|
}
|
|
|
|
#define N 256
|
|
|
|
#define append(...) o += ksnprintf(buf + o, N - o, __VA_ARGS__)
|
|
|
|
const char *_DescribeSigaction(char buf[N], int rc,
|
|
const struct sigaction *sa) {
|
|
int o = 0;
|
|
char b64[64];
|
|
|
|
if (rc == -1)
|
|
return "n/a";
|
|
if (!sa)
|
|
return "NULL";
|
|
if (kisdangerous(sa)) {
|
|
ksnprintf(buf, N, "%p", sa);
|
|
return buf;
|
|
}
|
|
|
|
append("{.sa_handler=%s", DescribeSigHandler(b64, sa->sa_handler));
|
|
|
|
if (sa->sa_flags) {
|
|
append(", .sa_flags=%s", DescribeSigFlags(b64, sa->sa_flags));
|
|
}
|
|
|
|
if (!sigisemptyset(&sa->sa_mask)) {
|
|
append(", .sa_mask=%s", DescribeSigset(rc, &sa->sa_mask));
|
|
}
|
|
|
|
append("}");
|
|
|
|
return buf;
|
|
}
|