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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
71 lines
3.5 KiB
C
71 lines
3.5 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 2020 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/internal.h"
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#include "libc/calls/sig.internal.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/fmt/itoa.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Changes signal blocking state of calling thread, e.g.:
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*
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* sigset_t neu,old;
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* sigfillset(&neu);
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* sigprocmask(SIG_BLOCK, &neu, &old);
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* sigprocmask(SIG_SETMASK, &old, NULL);
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*
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* @param how can be SIG_BLOCK (U), SIG_UNBLOCK (/), SIG_SETMASK (=)
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* @param set is the new mask content (optional)
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* @param oldset will receive the old mask (optional) and can't overlap
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* @return 0 on success, or -1 w/ errno
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* @raise EFAULT if `set` or `oldset` is bad memory
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* @raise EINVAL if `how` is invalid
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* @asyncsignalsafe
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* @restartable
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* @vforksafe
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*/
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int sigprocmask(int how, const sigset_t *opt_set, sigset_t *opt_out_oldset) {
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int rc;
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sigset_t old = {0};
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if (IsAsan() &&
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((opt_set && !__asan_is_valid(opt_set, sizeof(*opt_set))) ||
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(opt_out_oldset &&
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!__asan_is_valid(opt_out_oldset, sizeof(*opt_out_oldset))))) {
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rc = efault();
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} else if (IsMetal() || IsWindows()) {
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rc = __sig_mask(how, opt_set, &old);
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} else {
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rc = sys_sigprocmask(how, opt_set, opt_out_oldset ? &old : 0);
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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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STRACE("sigprocmask(%s, %s, [%s]) → %d% m", DescribeHow(how),
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DescribeSigset(0, opt_set), DescribeSigset(rc, opt_out_oldset), rc);
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return rc;
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}
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