Annotation of src/sys/sys/proc.h, Revision 1.29.2.3
1.29.2.3! mycroft 1: /* $NetBSD: proc.h,v 1.29.2.2 1994/08/15 22:02:33 mycroft Exp $ */
1.29 cgd 2:
3: /*-
4: * Copyright (c) 1986, 1989, 1991, 1993
5: * The Regents of the University of California. All rights reserved.
6: * (c) UNIX System Laboratories, Inc.
7: * All or some portions of this file are derived from material licensed
8: * to the University of California by American Telephone and Telegraph
9: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10: * the permission of UNIX System Laboratories, Inc.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the University of
23: * California, Berkeley and its contributors.
24: * 4. Neither the name of the University nor the names of its contributors
25: * may be used to endorse or promote products derived from this software
26: * without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38: * SUCH DAMAGE.
39: *
40: * @(#)proc.h 8.8 (Berkeley) 1/21/94
41: */
42:
43: #ifndef _SYS_PROC_H_
44: #define _SYS_PROC_H_
45:
46: #include <machine/proc.h> /* Machine-dependent proc substruct. */
47: #include <sys/select.h> /* For struct selinfo. */
48:
49: /*
50: * One structure allocated per session.
51: */
52: struct session {
53: int s_count; /* Ref cnt; pgrps in session. */
54: struct proc *s_leader; /* Session leader. */
55: struct vnode *s_ttyvp; /* Vnode of controlling terminal. */
56: struct tty *s_ttyp; /* Controlling terminal. */
57: char s_login[MAXLOGNAME]; /* Setlogin() name. */
58: };
59:
60: /*
61: * One structure allocated per process group.
62: */
63: struct pgrp {
64: struct pgrp *pg_hforw; /* Forward link in hash bucket. */
65: struct proc *pg_mem; /* Pointer to pgrp members. */
66: struct session *pg_session; /* Pointer to session. */
67: pid_t pg_id; /* Pgrp id. */
68: int pg_jobc; /* # procs qualifying pgrp for job control */
69: };
70:
71: /*
72: * Description of a process.
73: *
74: * This structure contains the information needed to manage a thread of
75: * control, known in UN*X as a process; it has references to substructures
76: * containing descriptions of things that the process uses, but may share
77: * with related processes. The process structure and the substructures
78: * are always addressible except for those marked "(PROC ONLY)" below,
79: * which might be addressible only on a processor on which the process
80: * is running.
81: */
82: struct proc {
83: struct proc *p_forw; /* Doubly-linked run/sleep queue. */
84: struct proc *p_back;
85: struct proc *p_next; /* Linked list of active procs */
86: struct proc **p_prev; /* and zombies. */
87:
88: /* substructures: */
89: struct pcred *p_cred; /* Process owner's identity. */
90: struct filedesc *p_fd; /* Ptr to open files structure. */
91: struct pstats *p_stats; /* Accounting/statistics (PROC ONLY). */
92: struct plimit *p_limit; /* Process limits. */
93: struct vmspace *p_vmspace; /* Address space. */
94: struct sigacts *p_sigacts; /* Signal actions, state (PROC ONLY). */
95:
96: #define p_ucred p_cred->pc_ucred
97: #define p_rlimit p_limit->pl_rlimit
98:
99: int p_flag; /* P_* flags. */
100: char p_stat; /* S* process status. */
101: char p_pad1[3];
102:
103: pid_t p_pid; /* Process identifier. */
104: struct proc *p_hash; /* Hashed based on p_pid for kill+exit+... */
105: struct proc *p_pgrpnxt; /* Pointer to next process in process group. */
106: struct proc *p_pptr; /* Pointer to process structure of parent. */
107: struct proc *p_osptr; /* Pointer to older sibling processes. */
108:
109: /* The following fields are all zeroed upon creation in fork. */
110: #define p_startzero p_ysptr
111:
112: struct proc *p_ysptr; /* Pointer to younger siblings. */
113: struct proc *p_cptr; /* Pointer to youngest living child. */
114: pid_t p_oppid; /* Save parent pid during ptrace. XXX */
115: int p_dupfd; /* Sideways return value from fdopen. XXX */
116:
117: /* scheduling */
118: u_int p_estcpu; /* Time averaged value of p_cpticks. */
119: int p_cpticks; /* Ticks of cpu time. */
120: fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
121: void *p_wchan; /* Sleep address. */
122: char *p_wmesg; /* Reason for sleep. */
123: u_int p_swtime; /* Time swapped in or out. */
124: u_int p_slptime; /* Time since last blocked. */
125:
126: struct itimerval p_realtimer; /* Alarm timer. */
127: struct timeval p_rtime; /* Real time. */
128: u_quad_t p_uticks; /* Statclock hits in user mode. */
129: u_quad_t p_sticks; /* Statclock hits in system mode. */
130: u_quad_t p_iticks; /* Statclock hits processing intr. */
131:
132: int p_traceflag; /* Kernel trace points. */
133: struct vnode *p_tracep; /* Trace to vnode. */
134:
135: int p_siglist; /* Signals arrived but not delivered. */
136:
137: struct vnode *p_textvp; /* Vnode of executable. */
138:
139: int p_holdcnt; /* If non-zero, don't swap. */
140:
141: long p_spare[4]; /* pad to 256, avoid shifting eproc. */
142:
143: /* End area that is zeroed on creation. */
144: #define p_endzero p_startcopy
145:
146: /* The following fields are all copied upon creation in fork. */
147: #define p_startcopy p_sigmask
148:
149: sigset_t p_sigmask; /* Current signal mask. */
150: sigset_t p_sigignore; /* Signals being ignored. */
151: sigset_t p_sigcatch; /* Signals being caught by user. */
152:
153: u_char p_priority; /* Process priority. */
154: u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */
155: char p_nice; /* Process "nice" value. */
156: char p_comm[MAXCOMLEN+1];
157: u_char p_emul; /* Operating system being emulated. */
158:
159: struct pgrp *p_pgrp; /* Pointer to process group. */
160:
161: /* End area that is copied on creation. */
162: #define p_endcopy p_thread
163:
164: int p_thread; /* Id for this "thread"; Mach glue. XXX */
165: struct user *p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */
166: struct mdproc p_md; /* Any machine-dependent fields. */
167:
168: u_short p_xstat; /* Exit status for wait; also stop signal. */
169: u_short p_acflag; /* Accounting flags. */
170: struct rusage *p_ru; /* Exit information. XXX */
171: };
172:
173: #define p_session p_pgrp->pg_session
174: #define p_pgid p_pgrp->pg_id
175:
176: /* Status values. */
177: #define SIDL 1 /* Process being created by fork. */
178: #define SRUN 2 /* Currently runnable. */
179: #define SSLEEP 3 /* Sleeping on an address. */
180: #define SSTOP 4 /* Process debugging or suspension. */
181: #define SZOMB 5 /* Awaiting collection by parent. */
182:
183: /* These flags are kept in p_flags. */
184: #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
185: #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
186: #define P_INMEM 0x00004 /* Loaded into memory. */
187: #define P_NOCLDSTOP 0x00008 /* No SIGCHLD when children stop. */
188: #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
189: #define P_PROFIL 0x00020 /* Has started profiling. */
190: #define P_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
191: #define P_SINTR 0x00080 /* Sleep is interruptible. */
192: #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
193: #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
194: #define P_TIMEOUT 0x00400 /* Timing out during sleep. */
195: #define P_TRACED 0x00800 /* Debugged process being traced. */
196: #define P_WAITED 0x01000 /* Debugging process has waited for child. */
197: #define P_WEXIT 0x02000 /* Working on exiting. */
198: #define P_EXEC 0x04000 /* Process called exec. */
199:
200: /* Should be moved to machine-dependent areas. */
201: #define P_OWEUPC 0x08000 /* Owe process an addupc() call at next ast. */
202:
203: /* XXX Not sure what to do with these, yet. */
204: #define P_FSTRACE 0x10000 /* tracing via file system (elsewhere?) */
205: #define P_SSTEP 0x20000 /* process needs single-step fixup ??? */
206:
207: /*
208: * Definitions for the p_emul flag.
209: */
210: #define EMUL_NETBSD 0 /* default, naturally */
211: #define EMUL_SUNOS 1 /* sunos 4.x binaries */
212: #define EMUL_HPUX 2 /* HPUX binaries */
213: #define EMUL_ULTRIX 3 /* Ultrix binaries */
1.29.2.3! mycroft 214: #define EMUL_IBCS2_ELF 4 /* Intel Binary compat; SVR4 */
! 215: #define EMUL_IBCS2_COFF 5 /* Intel Binary compat; SCO Unix */
! 216: #define EMUL_IBCS2_XOUT 6 /* Intel Binary compat; SCO Xenix */
! 217: #define EMUL_OSF1 7 /* OSF/1 binaries */
1.29 cgd 218:
219: /*
220: * MOVE TO ucred.h?
221: *
222: * Shareable process credentials (always resident). This includes a reference
223: * to the current user credentials as well as real and saved ids that may be
224: * used to change ids.
225: */
226: struct pcred {
227: struct ucred *pc_ucred; /* Current credentials. */
228: uid_t p_ruid; /* Real user id. */
229: uid_t p_svuid; /* Saved effective user id. */
230: gid_t p_rgid; /* Real group id. */
231: gid_t p_svgid; /* Saved effective group id. */
232: int p_refcnt; /* Number of references. */
233: };
234:
235: #ifdef KERNEL
236: /*
237: * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
238: * as it is used to represent "no process group".
239: */
240: #define PID_MAX 30000
241: #define NO_PID 30001
242: #define PIDHASH(pid) ((pid) & pidhashmask)
243:
244: #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
245: #define SESSHOLD(s) ((s)->s_count++)
246: #define SESSRELE(s) { \
247: if (--(s)->s_count == 0) \
248: FREE(s, M_SESSION); \
249: }
250:
251: extern struct proc *pidhash[]; /* In param.c. */
252: extern struct pgrp *pgrphash[]; /* In param.c. */
253: extern struct proc *curproc; /* Current running proc. */
254: extern struct proc proc0; /* Process slot for swapper. */
255: extern int nprocs, maxproc; /* Current and max number of procs. */
256: extern int pidhashmask; /* In param.c. */
257:
258: volatile struct proc *allproc; /* List of active procs. */
259: struct proc *zombproc; /* List of zombie procs. */
260: struct proc *initproc, *pageproc; /* Process slots for init, pager. */
261:
262: #define NQS 32 /* 32 run queues. */
263: int whichqs; /* Bit mask summary of non-empty Q's. */
264: struct prochd {
265: struct proc *ph_link; /* Linked list of running processes. */
266: struct proc *ph_rlink;
267: } qs[NQS];
268:
269: struct proc *pfind __P((pid_t)); /* Find process by id. */
270: struct pgrp *pgfind __P((pid_t)); /* Find process group by id. */
271:
272: void fixjobc __P((struct proc *p, struct pgrp *pgrp, int entering));
273: void mi_switch __P((void));
274: void resetpriority __P((struct proc *));
275: void setrunnable __P((struct proc *));
276: void setrunqueue __P((struct proc *));
277: void sleep __P((void *chan, int pri));
278: int tsleep __P((void *chan, int pri, char *wmesg, int timo));
279: void unsleep __P((struct proc *));
280: void wakeup __P((void *chan));
281: #endif /* KERNEL */
282: #endif /* !_SYS_PROC_H_ */
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