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Konstantin Belousov
c1be185e3f
Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D54898
41 lines
925 B
C
41 lines
925 B
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright 2026 The FreeBSD Foundation
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*
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* This software were developed by
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* Konstantin Belousov <[email protected]> under sponsorship from
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* the FreeBSD Foundation.
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*/
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#include <errno.h>
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#include <unistd.h>
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pid_t
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rfork_thread(int flags, void *stack_addr, int (*start_fn)(void *), void *arg)
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{
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pid_t res;
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int ret;
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/*
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* Generic implementation cannot switch stacks. Only
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* architecture-specific code knows how to do it. Require
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* that caller knows that, and refuse to do operate if the
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* stack was supplied.
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*
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* Note that implementations that do switch stack, would fault
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* immediately if the passed stack is NULL. They do not need to
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* specifically check for the NULL stack value.
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*/
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if (stack_addr != NULL) {
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errno = EOPNOTSUPP;
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return (-1);
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}
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res = rfork(flags);
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if (res == 0) {
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ret = start_fn(arg);
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_exit(ret);
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}
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return (res);
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}
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