4.3BSD-Reno/src/sys/sys/user.h

/*
 * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution is only permitted until one year after the first shipment
 * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
 * binary forms are permitted provided that: (1) source distributions retain
 * this entire copyright notice and comment, and (2) distributions including
 * binaries display the following acknowledgement:  This product includes
 * software developed by the University of California, Berkeley and its
 * contributors'' in the documentation or other materials provided with the
 * distribution and in all advertising materials mentioning features or use
 * of this software.  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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)user.h	7.13 (Berkeley) 6/28/90
 */

#ifdef KERNEL
#include "machine/pcb.h"
#include "dmap.h"
#include "time.h"
#include "resource.h"
#include "namei.h"
#include "ucred.h"
#else
#include <machine/pcb.h>
#include <sys/dmap.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/namei.h>
#include <sys/ucred.h>
#endif

/*
 * Per process structure containing data that
 * isn't needed in core when the process is swapped out.
 */
 
struct	user {
	struct	pcb u_pcb;
	struct	proc *u_procp;		/* pointer to proc structure */
	int	*u_ar0;			/* address of users saved R0 */

/* 1.1 - processes and protection */
#define u_cred u_nd.ni_cred
#define u_uid	u_cred->cr_uid		/* effective user id */
#define u_gid	u_cred->cr_gid		/* effective group id */

/* 1.2 - memory management */
	segsz_t u_tsize;		/* text size (clicks) */
	segsz_t u_dsize;		/* data size (clicks) */
	segsz_t u_ssize;		/* stack size (clicks) */
	struct	dmap u_dmap;		/* disk map for data segment */
	struct	dmap u_smap;		/* disk map for stack segment */
	struct	dmap u_cdmap;		/* temp data segment disk map */
	struct	dmap u_csmap;		/* temp stack segment disk map */
	label_t u_ssave;		/* label variable for swapping */
	segsz_t u_odsize, u_ossize;	/* for (clumsy) expansion swaps */
	time_t	u_outime;		/* user time at last sample */
	struct	mapmem *u_mmap;		/* list of mapped memory regions */

/* 1.3 - signal management */
	sig_t	u_signal[NSIG];		/* disposition of signals */
	int	u_sigmask[NSIG];	/* signals to be blocked */
	int	u_sigonstack;		/* signals to take on sigstack */
	int	u_sigintr;		/* signals that interrupt syscalls */
	int	u_oldmask;		/* saved mask from before sigpause */
	struct	sigstack u_sigstack;	/* sp & on stack state variable */
#define	u_onstack	u_sigstack.ss_onstack
#define	u_sigsp		u_sigstack.ss_sp
	int	u_sig;			/* for core dump/debugger XXX */
	int	u_code;			/* for core dump/debugger XXX */

/* 1.4 - descriptor management */
	struct	file *u_ofile[NOFILE];	/* file structures for open files */
	char	u_pofile[NOFILE];	/* per-process flags of open files */
	int	u_lastfile;		/* high-water mark of u_ofile */
#define	UF_EXCLOSE 	0x1		/* auto-close on exec */
#define	UF_MAPPED 	0x2		/* mapped from device */
#define u_cdir u_nd.ni_cdir		/* current directory */
#define u_rdir u_nd.ni_rdir		/* root directory of current process */
	short	u_cmask;		/* mask for file creation */

/* 1.5 - timing and statistics */
	struct	rusage u_ru;		/* stats for this proc */
	struct	rusage u_cru;		/* sum of stats for reaped children */
	struct	itimerval u_timer[3];
	struct	timeval u_start;
	short	u_acflag;

	struct uprof {			/* profile arguments */
		short	*pr_base;	/* buffer base */
		unsigned pr_size;	/* buffer size */
		unsigned pr_off;	/* pc offset */
		unsigned pr_scale;	/* pc scaling */
	} u_prof;

/* 1.6 - resource controls */
	struct	rlimit u_rlimit[RLIM_NLIMITS];

/* namei & co. */
	struct	nameidata u_nd;

	long	u_spare[8];
	int	u_stack[1];
};

/* u_error codes */
#ifdef KERNEL
#include "errno.h"
#else
#include <errno.h>
#endif

#ifdef KERNEL
extern	struct user u;
extern	struct user swaputl;
extern	struct user forkutl;
extern	struct user xswaputl;
extern	struct user xswap2utl;
extern	struct user pushutl;
extern	struct user vfutl;
#endif