minix/servers/vfs/fproc.h
Tomas Hruby 8590ac260d Removed dependency of vfs on NR_TASKS macro
- all macros in consts.h that depend on NR_TASKS replaced by a FP_BLOCKED_ON_*

- fp_suspended removed and replaced by fp_blocked_on. Testing whether a process
  is supended is qeual to testing whether fp_blocked_on is FP_BLOCKED_ON_NONE or
  not

- fp_task is valid only if fp_blocked_on == FP_BLOCKED_ON_OTHER

- no need of special values that do not colide with valid and special endpoints
  since they are not used as endpoints anymore

- suspend only takes FP_BLOCKED_ON_* values not endpoints anymore

- suspend(task) replaced by wait_for(task) which sets fp_task so we remember who
  are we waiting for and suspend sets fp_blocked_on to FP_BLOCKED_ON_OTHER to
  signal that we are waiting for some other process

- some functions should take endpoint_t instead of int, fixed
2009-09-22 21:48:26 +00:00

57 lines
2.2 KiB
C

#ifndef __VFS_FPROC_H__
#define __VFS_FPROC_H__
#include <sys/select.h>
#include <minix/safecopies.h>
/* This is the per-process information. A slot is reserved for each potential
* process. Thus NR_PROCS must be the same as in the kernel. It is not
* possible or even necessary to tell when a slot is free here.
*/
EXTERN struct fproc {
unsigned fp_flags;
mode_t fp_umask; /* mask set by umask system call */
struct vnode *fp_wd; /* working directory; NULL during reboot */
struct vnode *fp_rd; /* root directory; NULL during reboot */
struct filp *fp_filp[OPEN_MAX];/* the file descriptor table */
fd_set fp_filp_inuse; /* which fd's are in use? */
uid_t fp_realuid; /* real user id */
uid_t fp_effuid; /* effective user id */
gid_t fp_realgid; /* real group id */
gid_t fp_effgid; /* effective group id */
dev_t fp_tty; /* major/minor of controlling tty */
int fp_fd; /* place to save fd if rd/wr can't finish */
char *fp_buffer; /* place to save buffer if rd/wr can't finish*/
int fp_nbytes; /* place to save bytes if rd/wr can't finish */
int fp_cum_io_partial; /* partial byte count if rd/wr can't finish */
int fp_revived; /* set to indicate process being revived */
endpoint_t fp_task; /* which task is proc suspended on */
int fp_blocked_on; /* what is it blocked on */
endpoint_t fp_ioproc; /* proc no. in suspended-on i/o message */
cp_grant_id_t fp_grant; /* revoke this grant on unsuspend if > -1 */
char fp_sesldr; /* true if proc is a session leader */
char fp_execced; /* true if proc has exec()ced after fork */
pid_t fp_pid; /* process id */
fd_set fp_cloexec_set; /* bit map for POSIX Table 6-2 FD_CLOEXEC */
endpoint_t fp_endpoint; /* kernel endpoint number of this process */
} fproc[NR_PROCS];
/* fp_flags */
#define NO_FLAGS 0
#define SUSP_REOPEN 1 /* Process is suspended until the reopens are
* completed (after the restart of a driver).
*/
/* Field values. */
#define NOT_REVIVING 0xC0FFEEE /* process is not being revived */
#define REVIVING 0xDEEAD /* process is being revived from suspension */
#define PID_FREE 0 /* process slot free */
#endif /* __VFS_FPROC_H__ */