minix/servers/fs/fproc.h

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2005-04-21 16:53:53 +02:00
/* 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 {
mode_t fp_umask; /* mask set by umask system call */
struct inode *fp_workdir; /* pointer to working directory's inode */
struct inode *fp_rootdir; /* pointer to current root dir (see chroot) */
struct filp *fp_filp[OPEN_MAX];/* the file descriptor table */
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 */
char fp_suspended; /* set to indicate process hanging */
char fp_revived; /* set to indicate process being revived */
char fp_task; /* which task is proc suspended on */
char fp_sesldr; /* true if proc is a session leader */
char fp_execced; /* true if proc has exec()ced after fork */
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pid_t fp_pid; /* process id */
long fp_cloexec; /* bit map for POSIX Table 6-2 FD_CLOEXEC */
} fproc[NR_PROCS];
/* Field values. */
#define NOT_SUSPENDED 0 /* process is not suspended on pipe or task */
#define SUSPENDED 1 /* process is suspended on pipe or task */
#define NOT_REVIVING 0 /* process is not being revived */
#define REVIVING 1 /* process is being revived from suspension */
#define PID_FREE 0 /* process slot free */
/* Check is process number is acceptable - includes system processes. */
#define isokprocnr(n) ((unsigned)((n)+NR_TASKS) < NR_PROCS + NR_TASKS)