/* * 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 */ long p_sig; /* signals pending to this process */ ushort p_uid; /* real user id */ short p_pgrp; /* name of process group leader */ short p_pid; /* unique process id */ short p_ppid; /* process id of parent */ #ifdef vax short p_addr[UPAGES]; /* page table entries of u-area */ #else short p_addr; /* address of swappable image */ #endif short p_size; /* size of swappable image (clicks) */ #ifdef vax short p_swaddr; /* disk address when swapped */ short p_swsize; /* number of clicks already swapped */ short p_tsize; /* size of text (used by exec/swapin) */ #endif 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 STEXT 0100 /* text pointer valid */ #define SSPART 0200 /* process is partially swapped out */ /* * 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 */ long xp_sig; /* signals pending to this process */ ushort xp_uid; /* real user id */ 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 */ };