1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 31 #ifndef _SYS_SESSION_H 32 #define _SYS_SESSION_H 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 typedef struct sess { 41 uint_t s_ref; /* reference count */ 42 mode_t s_mode; /* /sess current permissions */ 43 uid_t s_uid; /* /sess current user ID */ 44 gid_t s_gid; /* /sess current group ID */ 45 time_t s_ctime; /* /sess change time */ 46 dev_t s_dev; /* tty's device number */ 47 struct vnode *s_vp; /* tty's vnode */ 48 struct pid *s_sidp; /* session ID info */ 49 struct cred *s_cred; /* allocation credentials */ 50 kmutex_t s_lock; /* sync s_vp use with freectty */ 51 kcondvar_t s_wait_cv; /* Condvar for sleeping */ 52 int s_cnt; /* # of active users of this session */ 53 int s_flag; /* session state flag see below */ 54 } sess_t; 55 56 #define SESS_CLOSE 1 /* session about to close */ 57 #define s_sid s_sidp->pid_id 58 59 /* 60 * Enumeration of the types of access that can be requested for a 61 * controlling terminal under job control. 62 */ 63 64 enum jcaccess { 65 JCREAD, /* read data on a ctty */ 66 JCWRITE, /* write data to a ctty */ 67 JCSETP, /* set ctty parameters */ 68 JCGETP /* get ctty parameters */ 69 }; 70 71 #if defined(_KERNEL) 72 73 extern sess_t session0; 74 75 #define SESS_HOLD(sp) (++(sp)->s_ref) 76 #define SESS_RELE(sp) sess_rele(sp) 77 78 /* 79 * Used to synchronizing sessions vnode users with freectty 80 */ 81 82 #define TTY_HOLD(sp) { \ 83 mutex_enter(&(sp)->s_lock); \ 84 (++(sp)->s_cnt); \ 85 mutex_exit(&(sp)->s_lock); \ 86 } 87 88 #define TTY_RELE(sp) { \ 89 mutex_enter(&(sp)->s_lock); \ 90 if ((--(sp)->s_cnt) == 0) \ 91 cv_signal(&(sp)->s_wait_cv); \ 92 mutex_exit(&(sp)->s_lock); \ 93 } 94 95 /* forward referenced structure tags */ 96 struct vnode; 97 struct cred; 98 struct proc; 99 100 extern void sess_rele(sess_t *); 101 extern void sess_create(void); 102 extern void freectty(sess_t *); 103 extern void alloctty(struct proc *, struct vnode *); 104 extern dev_t cttydev(struct proc *); 105 extern int hascttyperm(sess_t *, struct cred *, mode_t); 106 107 #endif /* defined(_KERNEL) */ 108 109 #ifdef __cplusplus 110 } 111 #endif 112 113 #endif /* _SYS_SESSION_H */ 114