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filedesc.h (31558) filedesc.h (41086)
1/*
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)filedesc.h 8.1 (Berkeley) 6/2/93
1/*
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)filedesc.h 8.1 (Berkeley) 6/2/93
34 * $Id: filedesc.h,v 1.12 1997/10/12 20:25:57 phk Exp $
34 * $Id: filedesc.h,v 1.13 1997/12/05 18:58:10 bde Exp $
35 */
36
37#ifndef _SYS_FILEDESC_H_
38#define _SYS_FILEDESC_H_
39
35 */
36
37#ifndef _SYS_FILEDESC_H_
38#define _SYS_FILEDESC_H_
39
40#include <sys/queue.h>
41
40/*
41 * This structure is used for the management of descriptors. It may be
42 * shared by multiple processes.
43 *
44 * A process is initially started out with NDFILE descriptors stored within
45 * this structure, selected to be enough for typical applications based on
46 * the historical limit of 20 open files (and the usage of descriptors by
47 * shells). If these descriptors are exhausted, a larger descriptor table

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86#define UF_EXCLOSE 0x01 /* auto-close on exec */
87#define UF_MAPPED 0x02 /* mapped from device */
88
89/*
90 * Storage required per open file descriptor.
91 */
92#define OFILESIZE (sizeof(struct file *) + sizeof(char))
93
42/*
43 * This structure is used for the management of descriptors. It may be
44 * shared by multiple processes.
45 *
46 * A process is initially started out with NDFILE descriptors stored within
47 * this structure, selected to be enough for typical applications based on
48 * the historical limit of 20 open files (and the usage of descriptors by
49 * shells). If these descriptors are exhausted, a larger descriptor table

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88#define UF_EXCLOSE 0x01 /* auto-close on exec */
89#define UF_MAPPED 0x02 /* mapped from device */
90
91/*
92 * Storage required per open file descriptor.
93 */
94#define OFILESIZE (sizeof(struct file *) + sizeof(char))
95
96/*
97 * This structure that holds the information needed to send a SIGIO or
98 * a SIGURG signal to a process or process group when new data arrives
99 * on a device or socket. The structure is placed on an SLIST belonging
100 * to the proc or pgrp so that the entire list may be revoked when the
101 * process exits or the process group disappears.
102 */
103struct sigio {
104 union {
105 struct proc *siu_proc; /* Process to receive SIGIO/SIGURG */
106 struct pgrp *siu_pgrp; /* Process group to receive ... */
107 } sio_u;
108 SLIST_ENTRY(sigio) sio_pgsigio; /* sigio's for process or group */
109 struct sigio **sio_myref; /* location of the pointer that holds
110 * the reference to this structure */
111 struct ucred *sio_ucred; /* Current credentials */
112 uid_t sio_ruid; /* Real user id */
113 pid_t sio_pgid; /* pgid for signals */
114};
115#define sio_proc sio_u.siu_proc
116#define sio_pgrp sio_u.siu_pgrp
117
118SLIST_HEAD(sigiolst, sigio);
119
94#ifdef KERNEL
95/*
96 * Kernel global variables and routines.
97 */
98int dupfdopen __P((struct filedesc *, int, int, int, int));
99int fdalloc __P((struct proc *p, int want, int *result));
100int fdavail __P((struct proc *p, int n));
101int falloc __P((struct proc *p, struct file **resultfp, int *resultfd));
102void ffree __P((struct file *));
103struct filedesc *fdinit __P((struct proc *p));
104struct filedesc *fdshare __P((struct proc *p));
105struct filedesc *fdcopy __P((struct proc *p));
106void fdfree __P((struct proc *p));
107int closef __P((struct file *fp,struct proc *p));
108void fdcloseexec __P((struct proc *p));
109int getvnode __P((struct filedesc *fdp, int fd, struct file **fpp));
110int fdissequential __P((struct file *));
111void fdsequential __P((struct file *, int));
120#ifdef KERNEL
121/*
122 * Kernel global variables and routines.
123 */
124int dupfdopen __P((struct filedesc *, int, int, int, int));
125int fdalloc __P((struct proc *p, int want, int *result));
126int fdavail __P((struct proc *p, int n));
127int falloc __P((struct proc *p, struct file **resultfp, int *resultfd));
128void ffree __P((struct file *));
129struct filedesc *fdinit __P((struct proc *p));
130struct filedesc *fdshare __P((struct proc *p));
131struct filedesc *fdcopy __P((struct proc *p));
132void fdfree __P((struct proc *p));
133int closef __P((struct file *fp,struct proc *p));
134void fdcloseexec __P((struct proc *p));
135int getvnode __P((struct filedesc *fdp, int fd, struct file **fpp));
136int fdissequential __P((struct file *));
137void fdsequential __P((struct file *, int));
138pid_t fgetown __P((struct sigio *));
139int fsetown __P((pid_t, struct sigio **));
140void funsetown __P((struct sigio *));
141void funsetownlst __P((struct sigiolst *));
112#endif
113
114#endif
142#endif
143
144#endif