/* * 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_sig; /* signal number sent to this process */ char p_time; /* resident time for scheduling */ char p_cpu; /* cpu usage for scheduling */ char p_nice; /* nice for scheduling */ char p_dummy; /* this would be there anyway */ unsigned p_uid; /* user id, used to direct tty signals */ struct tty *p_ttyp; /* controlling tty */ /* fix000 */ int p_pid; /* unique process id */ int p_ppid; /* process id of parent */ int p_addr; /* address of swappable image */ int p_size; /* size of swappable image (*64 bytes) */ int p_wchan; /* event process is awaiting */ int *p_textp; /* pointer to text structure */ int *p_link; /* pointer to next proc */ unsigned p_stl; /* count of secs left of sleep time */ unsigned p_rtl; /* count of secs left of real time limit */ struct lnode *p_lnode; /* pointer to limit structure */ } proc[NPROC]; struct proc *max_proc; /* address of maximum entry used in proc table */ /* stat codes */ #define SSLEEP 1 /* sleeping on high priority */ #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 */