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The Linux nptl implementation is used as base for generic fork implementation to handle the internal locks and mutexes. The system specific bits are moved a new internal _Fork symbol. (This new implementation will be used to provide a async-signal-safe _Fork now that POSIX has clarified that fork might not be async-signal-safe [1]). For Hurd it means that the __nss_database_fork_prepare_parent and __nss_database_fork_subprocess will be run in a slight different order. [1] https://austingroupbugs.net/view.php?id=62
35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
/* _Fork implementation. Generic version.
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <unistd.h>
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/* Clone the calling process, creating an exact copy. Return -1 for errors,
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0 to the new process, and the process ID of the new process to the
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old process.
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Different than fork, this functions is marked as async-signal-safe by
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POSIX (by Austin Group issue 62). */
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pid_t
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_Fork (void)
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{
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__set_errno (ENOSYS);
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return -1;
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}
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libc_hidden_def (_Fork)
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stub_warning (_Fork)
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