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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/' ```
62 lines
3 KiB
C
62 lines
3 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/sig.internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/runtime/syslib.internal.h"
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#include "libc/sysv/consts/sicode.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Sends signal to self.
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*
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* This is basically the same as:
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*
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* pthread_kill(pthread_self(), sig);
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*
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* Note `SIG_DFL` still results in process death for most signals.
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*
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* POSIX defines raise() errors as returning non-zero and makes setting
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* `errno` optional. Every platform we've tested in our support vector
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* returns -1 with `errno` on error (like a normal system call).
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*
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* @param sig can be SIGALRM, SIGINT, SIGTERM, SIGKILL, etc.
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* @return 0 on success, or -1 w/ errno
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* @raise EINVAL if `sig` is invalid
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* @asyncsignalsafe
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*/
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int raise(int sig) {
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int rc;
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if (IsXnuSilicon()) {
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rc = _sysret(__syslib->__raise(sig));
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} else if (IsWindows()) {
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if (0 <= sig && sig <= 64) {
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__sig_raise(sig, SI_TKILL);
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rc = 0;
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} else {
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rc = einval();
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}
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} else {
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rc = sys_tkill(gettid(), sig, 0);
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}
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STRACE("raise(%G) → %d% m", sig, rc);
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return rc;
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}
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