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1.1 root 1: /* proc.h 6.1 83/07/29 */
2:
3: /*
4: * One structure allocated per active
5: * process. It contains all data needed
6: * about the process while the
7: * process may be swapped out.
8: * Other per process data (user.h)
9: * is swapped with the process.
10: */
11: struct proc {
12: struct proc *p_link; /* linked list of running processes */
13: struct proc *p_rlink;
14: struct pte *p_addr; /* u-area kernel map address */
15: char p_usrpri; /* user-priority based on p_cpu and p_nice */
16: char p_pri; /* priority, negative is high */
17: char p_cpu; /* cpu usage for scheduling */
18: char p_stat;
19: char p_time; /* resident time for scheduling */
20: char p_nice; /* nice for cpu usage */
21: char p_slptime; /* time since last block */
22: char p_cursig;
23: int p_sig; /* signals pending to this process */
24: int p_sigmask; /* current signal mask */
25: int p_sigignore; /* signals being ignored */
26: int p_sigcatch; /* signals being caught by user */
27: int p_flag;
28: short p_uid; /* user id, used to direct tty signals */
29: short p_pgrp; /* name of process group leader */
30: short p_pid; /* unique process id */
31: short p_ppid; /* process id of parent */
32: u_short p_xstat; /* Exit status for wait */
33: struct rusage *p_ru; /* mbuf holding exit information */
34: short p_poip; /* page outs in progress */
35: short p_szpt; /* copy of page table size */
36: size_t p_tsize; /* size of text (clicks) */
37: size_t p_dsize; /* size of data space (clicks) */
38: size_t p_ssize; /* copy of stack size (clicks) */
39: size_t p_rssize; /* current resident set size in clicks */
40: size_t p_maxrss; /* copy of u.u_limit[MAXRSS] */
41: size_t p_swrss; /* resident set size before last swap */
42: swblk_t p_swaddr; /* disk address of u area when swapped */
43: caddr_t p_wchan; /* event process is awaiting */
44: struct text *p_textp; /* pointer to text structure */
45: struct pte *p_p0br; /* page table base P0BR */
46: struct proc *p_xlink; /* linked list of procs sharing same text */
47: short p_cpticks; /* ticks of cpu time */
48: float p_pctcpu; /* %cpu for this process during p_time */
49: short p_ndx; /* proc index for memall (because of vfork) */
50: short p_idhash; /* hashed based on p_pid for kill+exit+... */
51: struct proc *p_pptr; /* pointer to process structure of parent */
52: struct proc *p_cptr; /* pointer to youngest living child */
53: struct proc *p_osptr; /* pointer to older sibling processes */
54: struct proc *p_ysptr; /* pointer to younger siblings */
55: struct itimerval p_realtimer;
56: struct quota *p_quota; /* quotas for this process */
57: };
58:
59: #define PIDHSZ 63
60: #define PIDHASH(pid) ((pid) % PIDHSZ)
61:
62: #ifdef KERNEL
63: short pidhash[PIDHSZ];
64: struct proc *pfind();
65: struct proc *proc, *procNPROC; /* the proc table itself */
66: int nproc;
67:
68: #define NQS 32 /* 32 run queues */
69: struct prochd {
70: struct proc *ph_link; /* linked list of running processes */
71: struct proc *ph_rlink;
72: } qs[NQS];
73: int whichqs; /* bit mask summarizing non-empty qs's */
74: #endif
75:
76: /* stat codes */
77: #define SSLEEP 1 /* awaiting an event */
78: #define SWAIT 2 /* (abandoned state) */
79: #define SRUN 3 /* running */
80: #define SIDL 4 /* intermediate state in process creation */
81: #define SZOMB 5 /* intermediate state in process termination */
82: #define SSTOP 6 /* process being traced */
83:
84: /* flag codes */
85: #define SLOAD 0x0000001 /* in core */
86: #define SSYS 0x0000002 /* swapper or pager process */
87: #define SLOCK 0x0000004 /* process being swapped out */
88: #define SSWAP 0x0000008 /* save area flag */
89: #define STRC 0x0000010 /* process is being traced */
90: #define SWTED 0x0000020 /* another tracing flag */
91: #define SULOCK 0x0000040 /* user settable lock in core */
92: #define SPAGE 0x0000080 /* process in page wait state */
93: #define SKEEP 0x0000100 /* another flag to prevent swap out */
94: #define SOMASK 0x0000200 /* restore old mask after taking signal */
95: #define SWEXIT 0x0000400 /* working on exiting */
96: #define SPHYSIO 0x0000800 /* doing physical i/o (bio.c) */
97: #define SVFORK 0x0001000 /* process resulted from vfork() */
98: #define SVFDONE 0x0002000 /* another vfork flag */
99: #define SNOVM 0x0004000 /* no vm, parent in a vfork() */
100: #define SPAGI 0x0008000 /* init data space on demand, from inode */
101: #define SSEQL 0x0010000 /* user warned of sequential vm behavior */
102: #define SUANOM 0x0020000 /* user warned of random vm behavior */
103: #define STIMO 0x0040000 /* timing out during sleep */
104: /* was SDETACH */
105: #define SOUSIG 0x0100000 /* using old signal mechanism */
106: #define SOWEUPC 0x0200000 /* owe process an addupc() call at next ast */
107: #define SSEL 0x0400000 /* selecting; wakeup/waiting danger */
108: #define SLOGIN 0x0800000 /* a login process (legit child of init) */
109: #define SPTECHG 0x1000000 /* pte's for process have changed */
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