source: branches/minix3-book/servers/pm/mproc.h

/* This table has one slot per process.  It contains all the process management
 * information for each process.  Among other things, it defines the text, data
 * and stack segments, uids and gids, and various flags.  The kernel and file
 * systems have tables that are also indexed by process, with the contents
 * of corresponding slots referring to the same process in all three.
 */
#include <timers.h>

EXTERN struct mproc {
  struct mem_map mp_seg[NR_LOCAL_SEGS]; /* points to text, data, stack */
  char mp_exitstatus;           /* storage for status when process exits */
  char mp_sigstatus;            /* storage for signal # for killed procs */
  pid_t mp_pid;                 /* process id */
  pid_t mp_procgrp;             /* pid of process group (used for signals) */
  pid_t mp_wpid;                /* pid this process is waiting for */
  int mp_parent;                /* index of parent process */

  /* Child user and system times. Accounting done on child exit. */
  clock_t mp_child_utime;       /* cumulative user time of children */
  clock_t mp_child_stime;       /* cumulative sys time of children */

  /* Real and effective uids and gids. */
  uid_t mp_realuid;             /* process' real uid */
  uid_t mp_effuid;              /* process' effective uid */
  gid_t mp_realgid;             /* process' real gid */
  gid_t mp_effgid;              /* process' effective gid */

  /* File identification for sharing. */
  ino_t mp_ino;                 /* inode number of file */
  dev_t mp_dev;                 /* device number of file system */
  time_t mp_ctime;              /* inode changed time */

  /* Signal handling information. */
  sigset_t mp_ignore;           /* 1 means ignore the signal, 0 means don't */
  sigset_t mp_catch;            /* 1 means catch the signal, 0 means don't */
  sigset_t mp_sig2mess;         /* 1 means transform into notify message */
  sigset_t mp_sigmask;          /* signals to be blocked */
  sigset_t mp_sigmask2;         /* saved copy of mp_sigmask */
  sigset_t mp_sigpending;       /* pending signals to be handled */
  struct sigaction mp_sigact[_NSIG + 1]; /* as in sigaction(2) */
  vir_bytes mp_sigreturn;       /* address of C library __sigreturn function */
  struct timer mp_timer;        /* watchdog timer for alarm(2) */

  /* Backwards compatibility for signals. */
  sighandler_t mp_func;         /* all sigs vectored to a single user fcn */

  unsigned mp_flags;            /* flag bits */
  vir_bytes mp_procargs;        /* ptr to proc's initial stack arguments */
  struct mproc *mp_swapq;       /* queue of procs waiting to be swapped in */
  message mp_reply;             /* reply message to be sent to one */

  /* Scheduling priority. */
  signed int mp_nice;           /* nice is PRIO_MIN..PRIO_MAX, standard 0. */

  char mp_name[PROC_NAME_LEN];  /* process name */
} mproc[NR_PROCS];

/* Flag values */
#define IN_USE          0x001   /* set when 'mproc' slot in use */
#define WAITING         0x002   /* set by WAIT system call */
#define ZOMBIE          0x004   /* set by EXIT, cleared by WAIT */
#define PAUSED          0x008   /* set by PAUSE system call */
#define ALARM_ON        0x010   /* set when SIGALRM timer started */
#define SEPARATE        0x020   /* set if file is separate I & D space */
#define TRACED          0x040   /* set if process is to be traced */
#define STOPPED         0x080   /* set if process stopped for tracing */
#define SIGSUSPENDED    0x100   /* set by SIGSUSPEND system call */
#define REPLY           0x200   /* set if a reply message is pending */
#define ONSWAP          0x400   /* set if data segment is swapped out */
#define SWAPIN          0x800   /* set if on the "swap this in" queue */
#define DONT_SWAP      0x1000   /* never swap out this process */
#define PRIV_PROC      0x2000   /* system process, special privileges */

#define NIL_MPROC ((struct mproc *) 0)