/* proc.h 6.3 85/05/05 */
* One structure allocated per active
* process. It contains all data needed
* about the process while the
* process may be swapped out.
* Other per process data (user.h)
* is swapped with the process.
struct proc
*p_link
; /* linked list of running processes */
struct proc
*p_nxt
; /* linked list of allocated proc slots */
struct proc
**p_prev
; /* also zombies, and free proc's */
struct pte
*p_addr
; /* u-area kernel map address */
char p_usrpri
; /* user-priority based on p_cpu and p_nice */
char p_pri
; /* priority, negative is high */
char p_cpu
; /* cpu usage for scheduling */
char p_time
; /* resident time for scheduling */
char p_nice
; /* nice for cpu usage */
char p_slptime
; /* time since last block */
int p_sig
; /* signals pending to this process */
int p_sigmask
; /* current signal mask */
int p_sigignore
; /* signals being ignored */
int p_sigcatch
; /* signals being caught by user */
short p_uid
; /* user id, used to direct tty signals */
short p_pgrp
; /* name of process group leader */
short p_pid
; /* unique process id */
short p_ppid
; /* process id of parent */
u_short p_xstat
; /* Exit status for wait */
struct rusage
*p_ru
; /* mbuf holding exit information */
short p_poip
; /* page outs in progress */
short p_szpt
; /* copy of page table size */
size_t p_tsize
; /* size of text (clicks) */
size_t p_dsize
; /* size of data space (clicks) */
size_t p_ssize
; /* copy of stack size (clicks) */
size_t p_rssize
; /* current resident set size in clicks */
size_t p_maxrss
; /* copy of u.u_limit[MAXRSS] */
size_t p_swrss
; /* resident set size before last swap */
swblk_t p_swaddr
; /* disk address of u area when swapped */
caddr_t p_wchan
; /* event process is awaiting */
struct text
*p_textp
; /* pointer to text structure */
struct pte
*p_p0br
; /* page table base P0BR */
struct pte
*p_p1br
; /* page table base P1BR */
struct proc
*p_xlink
; /* linked list of procs sharing same text */
short p_cpticks
; /* ticks of cpu time */
float p_pctcpu
; /* %cpu for this process during p_time */
short p_ndx
; /* proc index for memall (because of vfork) */
short p_idhash
; /* hashed based on p_pid for kill+exit+... */
struct proc
*p_pptr
; /* pointer to process structure of parent */
struct proc
*p_cptr
; /* pointer to youngest living child */
struct proc
*p_osptr
; /* pointer to older sibling processes */
struct proc
*p_ysptr
; /* pointer to younger siblings */
struct itimerval p_realtimer
;
struct quota
*p_quota
; /* quotas for this process */
#define PIDHASH(pid) ((pid) & (PIDHSZ - 1))
struct proc
*proc
, *procNPROC
; /* the proc table itself */
struct proc
*freeproc
, *zombproc
, *allproc
;
/* lists of procs in various states */
#define NQS 32 /* 32 run queues */
struct proc
*ph_link
; /* linked list of running processes */
int whichqs
; /* bit mask summarizing non-empty qs's */
#define SSLEEP 1 /* awaiting an event */
#define SWAIT 2 /* (abandoned state) */
#define SRUN 3 /* running */
#define SIDL 4 /* intermediate state in process creation */
#define SZOMB 5 /* intermediate state in process termination */
#define SSTOP 6 /* process being traced */
#define SLOAD 0x0000001 /* in core */
#define SSYS 0x0000002 /* swapper or pager process */
#define SLOCK 0x0000004 /* process being swapped out */
#define SSWAP 0x0000008 /* save area flag */
#define STRC 0x0000010 /* process is being traced */
#define SWTED 0x0000020 /* another tracing flag */
#define SULOCK 0x0000040 /* user settable lock in core */
#define SPAGE 0x0000080 /* process in page wait state */
#define SKEEP 0x0000100 /* another flag to prevent swap out */
#define SOMASK 0x0000200 /* restore old mask after taking signal */
#define SWEXIT 0x0000400 /* working on exiting */
#define SPHYSIO 0x0000800 /* doing physical i/o (bio.c) */
#define SVFORK 0x0001000 /* process resulted from vfork() */
#define SVFDONE 0x0002000 /* another vfork flag */
#define SNOVM 0x0004000 /* no vm, parent in a vfork() */
#define SPAGI 0x0008000 /* init data space on demand, from inode */
#define SSEQL 0x0010000 /* user warned of sequential vm behavior */
#define SUANOM 0x0020000 /* user warned of random vm behavior */
#define STIMO 0x0040000 /* timing out during sleep */
#define SOUSIG 0x0100000 /* using old signal mechanism */
#define SOWEUPC 0x0200000 /* owe process an addupc() call at next ast */
#define SSEL 0x0400000 /* selecting; wakeup/waiting danger */
#define SLOGIN 0x0800000 /* a login process (legit child of init) */
#define SPTECHG 0x1000000 /* pte's for process have changed */