mirror of
https://github.com/jart/cosmopolitan.git
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51 lines
2.7 KiB
C
51 lines
2.7 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 2022 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/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/str/str.h"
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int sys_sigprocmask(int how, const sigset_t *opt_set,
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sigset_t *opt_out_oldset) {
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int res, rc, arg1;
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sigset_t old = {0};
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const sigset_t *arg2;
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if (!IsOpenbsd()) {
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rc = __sys_sigprocmask(how, opt_set, opt_out_oldset ? &old : 0, 8);
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} else {
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if (opt_set) {
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// openbsd only supports 32 signals so it passses them in a reg
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arg1 = how;
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arg2 = (sigset_t *)(uintptr_t)(*(uint32_t *)opt_set);
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} else {
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arg1 = how; // SIG_BLOCK
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arg2 = 0; // changes nothing
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}
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if ((res = __sys_sigprocmask(arg1, arg2, 0, 0)) != -1) {
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memcpy(&old, &res, sizeof(res));
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rc = 0;
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} else {
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rc = -1;
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}
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}
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if (rc != -1 && opt_out_oldset) {
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*opt_out_oldset = old;
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}
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return rc;
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}
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