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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
- /*-
- * Copyright (c) 1986, 1989, 1991, 1993
- * The Regents of the University of California. All rights reserved.
- * (c) UNIX System Laboratories, Inc.
- * All or some portions of this file are derived from material licensed
- * to the University of California by American Telephone and Telegraph
- * Co. or Unix System Laboratories, Inc. and are reproduced herein with
- * the permission of UNIX System Laboratories, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)proc.h 8.15 (Berkeley) 5/19/95
- */
-
- #ifndef _SYS_PROC_H_
- #define _SYS_PROC_H_
-
- #include <sys/cdefs.h>
-
- #include <sys/select.h> /* For struct selinfo. */
- #include <sys/queue.h>
- #include <sys/lock.h>
- #include <sys/param.h>
-
- /*
- * One structure allocated per session.
- */
- struct session {
- int s_count; /* Ref cnt; pgrps in session. */
- struct proc *s_leader; /* Session leader. */
- struct vnode *s_ttyvp; /* Vnode of controlling terminal. */
- struct tty *s_ttyp; /* Controlling terminal. */
- char s_login[MAXLOGNAME]; /* Setlogin() name. */
- };
-
- /*
- * One structure allocated per process group.
- */
- struct pgrp {
- LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */
- LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members. */
- struct session *pg_session; /* Pointer to session. */
- pid_t pg_id; /* Pgrp id. */
- int pg_jobc; /* # procs qualifying pgrp for job control */
- };
-
- /*
- * Description of a process.
- *
- * This structure contains the information needed to manage a thread of
- * control, known in UN*X as a process; it has references to substructures
- * containing descriptions of things that the process uses, but may share
- * with related processes. The process structure and the substructures
- * are always addressible except for those marked "(PROC ONLY)" below,
- * which might be addressible only on a processor on which the process
- * is running.
- */
- struct proc {
- LIST_ENTRY(proc) p_list; /* List of all processes. */
-
- /* substructures: */
- struct pcred *p_cred; /* Process owner's identity. */
- struct filedesc *p_fd; /* Ptr to open files structure. */
- struct pstats *p_stats; /* Accounting/statistics (PROC ONLY). */
- struct plimit *p_limit; /* Process limits. */
- struct sigacts *p_sigacts; /* Signal actions, state (PROC ONLY). */
-
- #define p_ucred p_cred->pc_ucred
- #define p_rlimit p_limit->pl_rlimit
-
- int p_flag; /* P_* flags. */
- char p_stat; /* S* process status. */
- char p_pad1[3];
-
- pid_t p_pid; /* Process identifier. */
- LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */
- struct proc *p_pptr; /* Pointer to parent process. */
- LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */
- LIST_HEAD(, proc) p_children; /* Pointer to list of children. */
-
- /* The following fields are all zeroed upon creation in fork. */
- #define p_startzero p_oppid
-
- pid_t p_oppid; /* Save parent pid during ptrace. XXX */
- int p_dupfd; /* Sideways return value from fdopen. XXX */
-
- /* scheduling */
- u_int p_estcpu; /* Time averaged value of p_cpticks. */
- int p_cpticks; /* Ticks of cpu time. */
- fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
- void *p_wchan; /* Sleep address. */
- char *p_wmesg; /* Reason for sleep. */
- u_int p_swtime; /* Time swapped in or out. */
- u_int p_slptime; /* Time since last blocked. */
-
- struct itimerval p_realtimer; /* Alarm timer. */
- struct timeval p_rtime; /* Real time. */
- u_quad_t p_uticks; /* Statclock hits in user mode. */
- u_quad_t p_sticks; /* Statclock hits in system mode. */
- u_quad_t p_iticks; /* Statclock hits processing intr. */
-
- int p_traceflag; /* Kernel trace points. */
- struct vnode *p_tracep; /* Trace to vnode. */
-
- sigset_t p_siglist; /* Signals arrived but not delivered. */
-
- struct vnode *p_textvp; /* Vnode of executable. */
-
- /* End area that is zeroed on creation. */
- #define p_endzero p_hash.le_next
-
- /*
- * Not copied, not zero'ed.
- * Belongs after p_pid, but here to avoid shifting proc elements.
- */
- LIST_ENTRY(proc) p_hash; /* Hash chain. */
- TAILQ_HEAD( ,eventqelt) p_evlist;
-
- /* The following fields are all copied upon creation in fork. */
- #define p_startcopy p_sigmask
-
- sigset_t p_sigmask; /* Current signal mask. */
- sigset_t p_sigignore; /* Signals being ignored. */
- sigset_t p_sigcatch; /* Signals being caught by user. */
-
- u_char p_priority; /* Process priority. */
- u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */
- char p_nice; /* Process "nice" value. */
- char p_comm[MAXCOMLEN+1];
-
- struct pgrp *p_pgrp; /* Pointer to process group. */
-
- /* End area that is copied on creation. */
- #define p_endcopy p_xstat
-
- u_short p_xstat; /* Exit status for wait; also stop signal. */
- u_short p_acflag; /* Accounting flags. */
- struct rusage *p_ru; /* Exit information. XXX */
-
- int p_debugger; /* 1: can exec set-bit programs if suser */
-
- void *task; /* corresponding task */
- void *sigwait_thread; /* 'thread' holding sigwait */
- struct lock__bsd__ signal_lock; /* multilple thread prot for signals*/
- boolean_t sigwait; /* indication to suspend */
- void *exit_thread; /* Which thread is exiting? */
- caddr_t user_stack; /* where user stack was allocated */
- void * exitarg; /* exit arg for proc terminate */
- void * vm_shm; /* for sysV shared memory */
- sigset_t p_sigpending; /* pended Signals as traced process is blocked. */
- int p_vforkcnt; /* number of outstanding vforks */
- void * p_vforkact; /* activation running this vfork proc */
- #if DIAGNOSTIC
- #if SIGNAL_DEBUG
- unsigned int lockpc[8];
- unsigned int unlockpc[8];
- #endif /* SIGNAL_DEBUG */
- #endif /* DIAGNOSTIC */
- };
-
- /* Exported fields for kern sysctls */
- struct extern_proc {
- struct proc *p_forw; /* Doubly-linked run/sleep queue. */
- struct proc *p_back;
- struct vmspace *p_vmspace; /* Address space. */
- struct sigacts *p_sigacts; /* Signal actions, state (PROC ONLY). */
- int p_flag; /* P_* flags. */
- char p_stat; /* S* process status. */
- pid_t p_pid; /* Process identifier. */
- pid_t p_oppid; /* Save parent pid during ptrace. XXX */
- int p_dupfd; /* Sideways return value from fdopen. XXX */
- /* Mach related */
- caddr_t user_stack; /* where user stack was allocated */
- void *exit_thread; /* XXX Which thread is exiting? */
- int p_debugger; /* allow to debug */
- boolean_t sigwait; /* indication to suspend */
- /* scheduling */
- u_int p_estcpu; /* Time averaged value of p_cpticks. */
- int p_cpticks; /* Ticks of cpu time. */
- fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
- void *p_wchan; /* Sleep address. */
- char *p_wmesg; /* Reason for sleep. */
- u_int p_swtime; /* Time swapped in or out. */
- u_int p_slptime; /* Time since last blocked. */
- struct itimerval p_realtimer; /* Alarm timer. */
- struct timeval p_rtime; /* Real time. */
- u_quad_t p_uticks; /* Statclock hits in user mode. */
- u_quad_t p_sticks; /* Statclock hits in system mode. */
- u_quad_t p_iticks; /* Statclock hits processing intr. */
- int p_traceflag; /* Kernel trace points. */
- struct vnode *p_tracep; /* Trace to vnode. */
- int p_siglist; /* Signals arrived but not delivered. */
- struct vnode *p_textvp; /* Vnode of executable. */
- int p_holdcnt; /* If non-zero, don't swap. */
- sigset_t p_sigmask; /* Current signal mask. */
- sigset_t p_sigignore; /* Signals being ignored. */
- sigset_t p_sigcatch; /* Signals being caught by user. */
- u_char p_priority; /* Process priority. */
- u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */
- char p_nice; /* Process "nice" value. */
- char p_comm[MAXCOMLEN+1];
- struct pgrp *p_pgrp; /* Pointer to process group. */
- struct user *p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */
- u_short p_xstat; /* Exit status for wait; also stop signal. */
- u_short p_acflag; /* Accounting flags. */
- struct rusage *p_ru; /* Exit information. XXX */
- };
-
- #define p_session p_pgrp->pg_session
- #define p_pgid p_pgrp->pg_id
-
- /* Status values. */
- #define SIDL 1 /* Process being created by fork. */
- #define SRUN 2 /* Currently runnable. */
- #define SSLEEP 3 /* Sleeping on an address. */
- #define SSTOP 4 /* Process debugging or suspension. */
- #define SZOMB 5 /* Awaiting collection by parent. */
-
- /* These flags are kept in p_flags. */
- #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
- #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
- #define P_INMEM 0x00004 /* Loaded into memory. */
- #define P_NOCLDSTOP 0x00008 /* No SIGCHLD when children stop. */
- #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
- #define P_PROFIL 0x00020 /* Has started profiling. */
- #define P_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
- #define P_SINTR 0x00080 /* Sleep is interruptible. */
- #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
- #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
- #define P_TIMEOUT 0x00400 /* Timing out during sleep. */
- #define P_TRACED 0x00800 /* Debugged process being traced. */
- #define P_WAITED 0x01000 /* Debugging process has waited for child. */
- #define P_WEXIT 0x02000 /* Working on exiting. */
- #define P_EXEC 0x04000 /* Process called exec. */
-
- /* Should probably be changed into a hold count. */
- #define P_NOSWAP 0x08000 /* Another flag to prevent swap out. */
- #define P_PHYSIO 0x10000 /* Doing physical I/O. */
-
- /* Should be moved to machine-dependent areas. */
- #define P_OWEUPC 0x08000 /* Owe process an addupc() call at next ast. */
-
- /* XXX Not sure what to do with these, yet. */
- #define P_FSTRACE 0x10000 /* tracing via file system (elsewhere?) */
- #define P_SSTEP 0x20000 /* process needs single-step fixup ??? */
-
- #define P_WAITING 0x0040000 /* process has a wait() in progress */
- #define P_KDEBUG 0x0080000 /* kdebug tracing is on for this process */
- #define P_TTYSLEEP 0x0100000 /* blocked due to SIGTTOU or SIGTTIN */
- #define P_REBOOT 0x0200000 /* Process called reboot() */
- #define P_TBE 0x0400000 /* Process is TBE */
- #define P_SIGTHR 0x0800000 /* signal pending handling thread scheduled */
- #define P_BTRACE 0x1000000 /* process is being branch traced */
- #define P_VFORK 0x2000000 /* process has vfork children */
- #define P_NOATTACH 0x4000000
- #define P_INVFORK 0x8000000 /* proc in vfork */
-
-
- /*
- * Shareable process credentials (always resident). This includes a reference
- * to the current user credentials as well as real and saved ids that may be
- * used to change ids.
- */
- struct pcred {
- struct lock__bsd__ pc_lock;
- struct ucred *pc_ucred; /* Current credentials. */
- uid_t p_ruid; /* Real user id. */
- uid_t p_svuid; /* Saved effective user id. */
- gid_t p_rgid; /* Real group id. */
- gid_t p_svgid; /* Saved effective group id. */
- int p_refcnt; /* Number of references. */
- };
-
- #define pcred_readlock(p) lockmgr(&(p)->p_cred->pc_lock, \
- LK_SHARED, 0, (p))
- #define pcred_writelock(p) lockmgr(&(p)->p_cred->pc_lock, \
- LK_EXCLUSIVE, 0, (p))
- #define pcred_unlock(p) lockmgr(&(p)->p_cred->pc_lock, \
- LK_RELEASE, 0, (p))
-
- #ifdef KERNEL
-
- __BEGIN_DECLS
- /*
- * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
- * as it is used to represent "no process group".
- */
- #define PID_MAX 30000
- #define NO_PID 30001
-
- #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
- #define SESSHOLD(s) ((s)->s_count++)
- #define SESSRELE(s) sessrele(s)
-
- #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
- extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
- extern u_long pidhash;
-
- #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
- extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
- extern u_long pgrphash;
-
- extern int nprocs, maxproc; /* Current and max number of procs. */
-
- LIST_HEAD(proclist, proc);
- extern struct proclist allproc; /* List of all processes. */
- extern struct proclist zombproc; /* List of zombie processes. */
- extern struct proc *initproc, *kernproc;
-
- extern struct proc *pfind __P((pid_t)); /* Find process by id. */
- extern struct pgrp *pgfind __P((pid_t)); /* Find process group by id. */
-
- extern int chgproccnt __P((uid_t uid, int diff));
- extern int enterpgrp __P((struct proc *p, pid_t pgid, int mksess));
- extern void fixjobc __P((struct proc *p, struct pgrp *pgrp, int entering));
- extern int inferior __P((struct proc *p));
- extern int leavepgrp __P((struct proc *p));
- extern void mi_switch __P((void));
- extern void pgdelete __P((struct pgrp *pgrp));
- extern void sessrele __P((struct session *sess));
- extern void procinit __P((void));
- extern void resetpriority __P((struct proc *));
- extern void setrunnable __P((struct proc *));
- extern void setrunqueue __P((struct proc *));
- extern int sleep __P((void *chan, int pri));
- extern int tsleep __P((void *chan, int pri, char *wmesg, int timo));
- extern int tsleep0 __P((void *chan, int pri, char *wmesg, int timo, int (*continuation)(int) ));
- extern void unsleep __P((struct proc *));
- extern void wakeup __P((void *chan));
- __END_DECLS
-
- #endif /* KERNEL */
-
- #endif /* !_SYS_PROC_H_ */
-