usr/src/slowsys/h/proc.h

/*
 * 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 {
        char    p_stat;
        char    p_flag;
        char    p_pri;          /* priority, negative is high */
        char    p_time;         /* resident time for scheduling */
        char    p_cpu;          /* cpu usage for scheduling */
        char    p_nice;         /* nice for cpu usage */
        short   p_sig;          /* signals pending to this process */
        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 */
        short   p_addr;         /* address of swappable image */
        short   p_size;         /* size of swappable image (clicks) */
        caddr_t p_wchan;        /* event process is awaiting */
        struct text *p_textp;   /* pointer to text structure */
        struct proc *p_link;    /* linked list of running processes */
        int     p_clktim;       /* time to alarm clock signal */
};

extern struct proc proc[];      /* the proc table itself */

/* stat codes */
#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 */

/* flag codes */
#define SLOAD   01              /* in core */
#define SSYS    02              /* scheduling process */
#define SLOCK   04              /* process cannot be swapped */
#define SSWAP   010             /* process is being swapped out */
#define STRC    020             /* process is being traced */
#define SWTED   040             /* another tracing flag */
#define SULOCK  0100            /* user settable lock in core */

/*
 * parallel proc structure
 * to replace part with times
 * to be passed to parent process
 * in ZOMBIE state.
 */
struct  xproc {
        char    xp_stat;
        char    xp_flag;
        char    xp_pri;         /* priority, negative is high */
        char    xp_time;        /* resident time for scheduling */
        char    xp_cpu;         /* cpu usage for scheduling */
        char    xp_nice;        /* nice for cpu usage */
        short   xp_sig;         /* signals pending to this process */
        short   xp_uid;         /* user id, used to direct tty signals */
        short   xp_pgrp;        /* name of process group leader */
        short   xp_pid;         /* unique process id */
        short   xp_ppid;        /* process id of parent */
        short   xp_xstat;       /* Exit status for wait */
        time_t  xp_utime;       /* user time, this proc */
        time_t  xp_stime;       /* system time, this proc */
};