93 lines
2.3 KiB
C
Executable File
93 lines
2.3 KiB
C
Executable File
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ifndef _SYS_SESSION_H
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#define _SYS_SESSION_H
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#pragma ident "@(#)session.h 1.12 95/05/03 SMI" /* SVr4.0 1.17 */
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct sess {
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short s_ref; /* reference count */
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short s_mode; /* /sess current permissions */
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uid_t s_uid; /* /sess current user ID */
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gid_t s_gid; /* /sess current group ID */
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ulong s_ctime; /* /sess change time */
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dev_t s_dev; /* tty's device number */
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struct vnode *s_vp; /* tty's vnode */
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struct pid *s_sidp; /* session ID info */
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struct cred *s_cred; /* allocation credentials */
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kmutex_t s_lock; /* sync s_vp use with freectty */
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kcondvar_t s_wait_cv; /* Condvar for sleeping */
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int s_cnt; /* # of active users of this session */
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int s_flag; /* session state flag see below */
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} sess_t;
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#define SESS_CLOSE 1 /* session about to close */
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#define s_sid s_sidp->pid_id
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/*
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* Enumeration of the types of access that can be requested for a
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* controlling terminal under job control.
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*/
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enum jcaccess {
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JCREAD, /* read data on a ctty */
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JCWRITE, /* write data to a ctty */
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JCSETP, /* set ctty parameters */
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JCGETP /* get ctty parameters */
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};
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#if defined(_KERNEL)
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extern sess_t session0;
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#define SESS_HOLD(sp) (++(sp)->s_ref)
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#define SESS_RELE(sp) (--(sp)->s_ref > 0 ? 0 : sess_rele(sp))
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/*
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* Used to synchronizing sessions vnode users with freectty
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*/
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#define TTY_HOLD(sp) { \
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mutex_enter(&(sp)->s_lock); \
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(++(sp)->s_cnt); \
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mutex_exit(&(sp)->s_lock); \
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}
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#define TTY_RELE(sp) { \
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mutex_enter(&(sp)->s_lock); \
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if ((--(sp)->s_cnt) == 0) \
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cv_signal(&(sp)->s_wait_cv); \
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mutex_exit(&(sp)->s_lock); \
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}
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/* forward referenced structure tags */
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struct vnode;
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struct cred;
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struct proc;
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extern int sess_rele(sess_t *);
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extern void sess_create(void);
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extern void freectty(sess_t *);
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extern void alloctty(struct proc *, struct vnode *);
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extern int realloctty(struct proc *, pid_t);
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extern dev_t cttydev(struct proc *);
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extern int hascttyperm(sess_t *, struct cred *, mode_t);
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#endif /* defined(_KERNEL) */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_SESSION_H */
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