servers/vfs/fproc.h

   1 #include <sys/select.h>
   2 #include <minix/safecopies.h>
   3
   4 /* This is the per-process information.  A slot is reserved for each potential
   5  * process. Thus NR_PROCS must be the same as in the kernel. It is not
   6  * possible or even necessary to tell when a slot is free here.
   7  */
   8 EXTERN struct fproc {
   9   unsigned fp_flags;
  10
  11   mode_t fp_umask;              /* mask set by umask system call */
  12
  13   struct vnode *fp_wd;          /* working directory; NULL during reboot */
  14   struct vnode *fp_rd;          /* root directory; NULL during reboot */
  15
  16   struct filp *fp_filp[OPEN_MAX];/* the file descriptor table */
  17
  18   fd_set fp_filp_inuse;         /* which fd's are in use? */
  19   uid_t fp_realuid;             /* real user id */
  20   uid_t fp_effuid;              /* effective user id */
  21   gid_t fp_realgid;             /* real group id */
  22   gid_t fp_effgid;              /* effective group id */
  23   dev_t fp_tty;                 /* major/minor of controlling tty */
  24   int fp_fd;                    /* place to save fd if rd/wr can't finish */
  25   char *fp_buffer;              /* place to save buffer if rd/wr can't finish*/
  26   int  fp_nbytes;               /* place to save bytes if rd/wr can't finish */
  27   int  fp_cum_io_partial;       /* partial byte count if rd/wr can't finish */
  28   int fp_suspended;             /* set to indicate process hanging */
  29   int fp_revived;               /* set to indicate process being revived */
  30   int fp_task;                  /* which task is proc suspended on */
  31
  32   endpoint_t fp_ioproc;         /* proc no. in suspended-on i/o message */
  33   cp_grant_id_t fp_grant;       /* revoke this grant on unsuspend if > -1 */
  34
  35   char fp_sesldr;               /* true if proc is a session leader */
  36   char fp_execced;              /* true if proc has exec()ced after fork */
  37   pid_t fp_pid;                 /* process id */
  38
  39   fd_set fp_cloexec_set;        /* bit map for POSIX Table 6-2 FD_CLOEXEC */
  40   endpoint_t fp_endpoint;       /* kernel endpoint number of this process */
  41 } fproc[NR_PROCS];
  42
  43 /* fp_flags */
  44 #define NO_FLAGS        0
  45 #define SUSP_REOPEN     1       /* Process is suspended until the reopens are
  46                                  * completed (after the restart of a driver).
  47                                  */
  48
  49 /* Field values. */
  50 /* fp_suspended is one of these. */
  51 #define NOT_SUSPENDED      0xC0FFEE     /* process is not suspended on pipe or task */
  52 #define SUSPENDED          0xDEAD       /* process is suspended on pipe or task */
  53
  54 #define NOT_REVIVING       0xC0FFEEE    /* process is not being revived */
  55 #define REVIVING           0xDEEAD      /* process is being revived from suspension */
  56 #define PID_FREE           0    /* process slot free */
  57
  58 /* Check is process number is acceptable - includes system processes. */
  59 #define isokprocnr(n)   ((unsigned)((n)+NR_TASKS) < NR_PROCS + NR_TASKS)
  60