usr/src/sys/sys/user.h

/*      user.h  4.26    83/05/21        */

#ifdef KERNEL
#include "../machine/pcb.h"
#include "../h/dmap.h"
#else
#include <machine/pcb.h>
#include <sys/dmap.h>
#endif
#include <time.h>
#include <resource.h>
/*
 * Per process structure containing data that
 * isn't needed in core when the process is swapped out.
 */

#define SHSIZE          32
#define MAXCOMLEN       16              /* <= MAXNAMLEN, >= sizeof(a_comm) */

struct  user {
        struct  pcb u_pcb;
        struct  proc *u_procp;          /* pointer to proc structure */
        int     *u_ar0;                 /* address of users saved R0 */
        char    u_comm[MAXNAMLEN + 1];

/* syscall parameters, results and catches */
        int     u_arg[8];               /* arguments to current system call */
        int     *u_ap;                  /* pointer to arglist */
        label_t u_qsave;                /* for non-local gotos on interrupts */
        char    u_error;                /* return error code */
        union {                         /* syscall return values */
                struct  {
                        int     R_val1;
                        int     R_val2;
                } u_rv;
#define r_val1  u_rv.R_val1
#define r_val2  u_rv.R_val2
                off_t   r_off;
                time_t  r_time;
        } u_r;
        char    u_eosys;                /* special action on end of syscall */

/* 1.1 - processes and protection */
        short   u_uid;                  /* effective user id */
        short   u_gid;                  /* effective group id */
        int     u_groups[NGROUPS];      /* groups, 0 terminated */
        short   u_ruid;                 /* real user id */
        short   u_rgid;                 /* real group id */

/* 1.2 - memory management */
        size_t  u_tsize;                /* text size (clicks) */
        size_t  u_dsize;                /* data size (clicks) */
        size_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, u_csmap;  /* shadows of u_dmap, u_smap, for
                                           use of parent during fork */
        label_t u_ssave;                /* label variable for swapping */
        size_t  u_odsize, u_ossize;     /* for (clumsy) expansion swaps */
        time_t  u_outime;               /* user time at last sample */

/* 1.3 - signal management */
        int     (*u_signal[NSIG])();    /* disposition of signals */
        long    u_sigmask[NSIG];        /* signals to be blocked */
        int     u_code;                 /* ``code'' to trap */
        caddr_t u_sigstack;             /* 0 means no sigstack */
        int     u_onsigstack;

/* 1.4 - descriptor management */
        struct  file *u_ofile[NOFILE];  /* file structures for open files */
        char    u_pofile[NOFILE];       /* per-process flags of open files */
#define UF_EXCLOSE      0x1             /* auto-close on exec */
#define UF_SHLOCK       0x2             /* shared lock present */
#define UF_EXLOCK       0x4             /* exclusive lock present */
#define UF_MAPPED       0x8
        struct  inode *u_cdir;          /* current directory */
        struct  inode *u_rdir;          /* root directory of current process */
        struct  tty *u_ttyp;            /* controlling tty pointer */
        dev_t   u_ttyd;                 /* controlling tty dev */
        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];
        int     u_XXX[3];
        time_t  u_start;
        short   u_acflag;

/* 1.6 - resource controls */
        struct  rlimit u_rlimit[RLIM_NLIMITS];
        struct  quota *u_quota;         /* user's quota structure */
        int     u_qflags;               /* per process quota flags */

/* BEGIN TRASH */
        char    u_segflg;               /* 0:user D; 1:system; 2:user I */
        caddr_t u_base;                 /* base address for IO */
        unsigned int u_count;           /* bytes remaining for IO */
        off_t   u_offset;               /* offset in file for IO */
        union {
           struct {                     /* header of executable file */
                int     Ux_mag;         /* magic number */
                unsigned Ux_tsize;      /* text size */
                unsigned Ux_dsize;      /* data size */
                unsigned Ux_bsize;      /* bss size */
                unsigned Ux_ssize;      /* symbol table size */
                unsigned Ux_entloc;     /* entry location */
                unsigned Ux_unused;
                unsigned Ux_relflg;
           } Ux_A;
           char ux_shell[SHSIZE];       /* #! and name of interpreter */
        } u_exdata;
#define ux_mag          Ux_A.Ux_mag
#define ux_tsize        Ux_A.Ux_tsize
#define ux_dsize        Ux_A.Ux_dsize
#define ux_bsize        Ux_A.Ux_bsize
#define ux_ssize        Ux_A.Ux_ssize
#define ux_entloc       Ux_A.Ux_entloc
#define ux_unused       Ux_A.Ux_unused
#define ux_relflg       Ux_A.Ux_relflg
        caddr_t u_dirp;                 /* pathname pointer */
        struct  direct u_dent;          /* current directory entry */
        struct  inode *u_pdir;          /* inode of parent directory of dirp */
/* END TRASH */
        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;
#ifdef sun
        int     u_lofault;              /* catch faults in locore.s */
#endif
        int     u_stack[1];
};

/* u_eosys values */
#define JUSTRETURN      0
#define RESTARTSYS      1
#define SIMULATERTI     2
#define REALLYRETURN    3

/* u_error codes */
#include <errno.h>

#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