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https://github.com/jart/cosmopolitan.git
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0277d7d6e9
It's now possible to build our pledge() polyfill as a dynamic shared object that can be injected into a glibc executable using LD_PRELOAD
35 lines
2.3 KiB
C
35 lines
2.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set 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/calls.h"
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#include "libc/calls/strace.internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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/**
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* Creates anonymous file.
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*
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* @param name is used for the `/proc/self/fd/FD` symlink
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* @param flags can have `MFD_CLOEXEC`, `MFD_ALLOW_SEALING`
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* @raise ENOSYS if not RHEL8+
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*/
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int memfd_create(const char *name, unsigned int flags) {
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int rc;
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rc = sys_memfd_create(name, flags);
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STRACE("memfd_create(%#s, %#x) → %d% m", name, flags, rc);
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return rc;
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}
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