c4e20cad00
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
140 lines
4.5 KiB
C
140 lines
4.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2009 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed at the University of Cambridge Computer
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* Laboratory with support from a grant from Google, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_PROCDESC_H_
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#define _SYS_PROCDESC_H_
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#ifdef _KERNEL
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#include <sys/selinfo.h> /* struct selinfo */
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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/*-
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* struct procdesc describes a process descriptor, and essentially consists
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* of two pointers -- one to the file descriptor, and one to the process.
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* When both become NULL, the process descriptor will be freed. An important
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* invariant is that there is only ever one process descriptor for a process,
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* so a single file pointer will suffice.
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*
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* Locking key:
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* (c) - Constant after initial setup.
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* (p) - Protected by the process descriptor mutex.
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* (r) - Atomic reference count.
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* (s) - Protected by selinfo.
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* (t) - Protected by the proctree_lock
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*/
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struct proc;
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struct sigio;
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struct procdesc {
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/*
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* Basic process descriptor state: the process, a cache of its pid to
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* satisfy queries after the process exits, and process descriptor
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* refcount.
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*/
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struct proc *pd_proc; /* (t) Process. */
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pid_t pd_pid; /* (c) Cached pid. */
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u_int pd_refcount; /* (r) Reference count. */
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/*
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* In-flight data and notification of events.
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*/
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int pd_flags; /* (p) PD_ flags. */
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u_short pd_xstat; /* (p) Exit status. */
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struct selinfo pd_selinfo; /* (p) Event notification. */
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struct mtx pd_lock; /* Protect data + events. */
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};
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/*
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* Locking macros for the procdesc itself.
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*/
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#define PROCDESC_LOCK_DESTROY(pd) mtx_destroy(&(pd)->pd_lock)
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#define PROCDESC_LOCK_INIT(pd) mtx_init(&(pd)->pd_lock, "procdesc", NULL, \
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MTX_DEF)
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#define PROCDESC_LOCK(pd) mtx_lock(&(pd)->pd_lock)
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#define PROCDESC_UNLOCK(pd) mtx_unlock(&(pd)->pd_lock)
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/*
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* Flags for the pd_flags field.
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*/
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#define PDF_CLOSED 0x00000001 /* Descriptor has closed. */
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#define PDF_SELECTED 0x00000002 /* Issue selwakeup(). */
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#define PDF_EXITED 0x00000004 /* Process exited. */
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#define PDF_DAEMON 0x00000008 /* Don't exit when procdesc closes. */
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/*
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* In-kernel interfaces to process descriptors.
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*/
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int procdesc_exit(struct proc *);
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int procdesc_find(struct thread *, int fd, cap_rights_t *, struct proc **);
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int kern_pdgetpid(struct thread *, int fd, cap_rights_t *, pid_t *pidp);
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void procdesc_new(struct proc *, int);
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void procdesc_finit(struct procdesc *, struct file *);
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pid_t procdesc_pid(struct file *);
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void procdesc_reap(struct proc *);
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int procdesc_falloc(struct thread *, struct file **, int *, int,
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struct filecaps *);
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#else /* !_KERNEL */
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#include <sys/_types.h>
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#ifndef _PID_T_DECLARED
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typedef __pid_t pid_t;
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#define _PID_T_DECLARED
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#endif
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struct rusage;
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/*
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* Process descriptor system calls.
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*/
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__BEGIN_DECLS
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pid_t pdfork(int *, int);
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int pdkill(int, int);
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int pdgetpid(int, pid_t *);
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__END_DECLS
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#endif /* _KERNEL */
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/*
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* Flags which can be passed to pdfork(2).
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*/
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#define PD_DAEMON 0x00000001 /* Don't exit when procdesc closes. */
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#define PD_CLOEXEC 0x00000002 /* Close file descriptor on exec. */
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#define PD_ALLOWED_AT_FORK (PD_DAEMON | PD_CLOEXEC)
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#endif /* !_SYS_PROCDESC_H_ */
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