mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
467a332e38
This change also invents sigcountset() and strsignal_r() and improves the quality of siginfo_t handling.
68 lines
3.3 KiB
C
68 lines
3.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 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/sig.internal.h"
|
|
#include "libc/calls/struct/sigset.h"
|
|
#include "libc/calls/struct/sigset.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/asan.internal.h"
|
|
#include "libc/intrin/describeflags.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
/**
|
|
* Determines the blocked pending signals
|
|
*
|
|
* @param pending is where the bitset of pending signals is returned,
|
|
* which may not be null
|
|
* @return 0 on success, or -1 w/ errno
|
|
* @raise EFAULT if `pending` points to invalid memory
|
|
* @asyncsignalsafe
|
|
*/
|
|
int sigpending(sigset_t *pending) {
|
|
int rc;
|
|
if (!pending || (IsAsan() && !__asan_is_valid(pending, sizeof(*pending)))) {
|
|
rc = efault();
|
|
} else if (IsLinux() || IsNetbsd() || IsOpenbsd() || IsFreebsd() || IsXnu()) {
|
|
// 128 signals on NetBSD and FreeBSD, 64 on Linux, 32 on OpenBSD and XNU
|
|
rc = sys_sigpending(pending, 8);
|
|
// OpenBSD passes signal sets in words rather than pointers
|
|
if (IsOpenbsd()) {
|
|
pending->__bits[0] = (unsigned)rc;
|
|
rc = 0;
|
|
}
|
|
// only modify memory on success
|
|
if (!rc) {
|
|
// clear unsupported bits
|
|
if (IsXnu()) {
|
|
pending->__bits[0] &= 0xFFFFFFFF;
|
|
}
|
|
if (IsLinux() || IsOpenbsd() || IsXnu()) {
|
|
pending->__bits[1] = 0;
|
|
}
|
|
}
|
|
} else if (IsWindows()) {
|
|
sigemptyset(pending);
|
|
__sig_pending(pending);
|
|
rc = 0;
|
|
} else {
|
|
rc = enosys();
|
|
}
|
|
STRACE("sigpending([%s]) → %d% m", DescribeSigset(rc, pending), rc);
|
|
return rc;
|
|
}
|