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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/' ```
57 lines
2.8 KiB
C
57 lines
2.8 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 2021 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/sysv/consts/ptrace.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/describeflags.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Traces process.
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*
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* This API is terrible. Consider using sys_ptrace().
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*
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* @param request can be PTRACE_xxx
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* @note de facto linux only atm
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* @vforksafe
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*/
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long ptrace(int request, ...) {
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// TODO(jart): FreeBSD addr and data args are different
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int pid;
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va_list va;
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bool ispeek;
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long rc, peek, addr, *data;
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va_start(va, request);
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pid = va_arg(va, int);
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addr = va_arg(va, long);
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data = va_arg(va, long *);
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va_end(va);
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if (request == -1) {
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rc = einval(); /* see consts.sh */
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} else {
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ispeek = IsLinux() && request - 1u < 3;
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if (ispeek) data = &peek;
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rc = __sys_ptrace(request, pid, addr, data);
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if (rc != -1 && ispeek) rc = peek;
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}
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STRACE("ptrace(%s, %d, %p, %p) → %p% m", DescribePtrace(request), pid, addr,
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data, rc);
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return rc;
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}
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