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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
26: /*-
27: * Copyright (c) 1983, 1990, 1993
28: * The Regents of the University of California. All rights reserved.
29: * (c) UNIX System Laboratories, Inc.
30: * All or some portions of this file are derived from material licensed
31: * to the University of California by American Telephone and Telegraph
32: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
33: * the permission of UNIX System Laboratories, Inc.
34: *
35: * Redistribution and use in source and binary forms, with or without
36: * modification, are permitted provided that the following conditions
37: * are met:
38: * 1. Redistributions of source code must retain the above copyright
39: * notice, this list of conditions and the following disclaimer.
40: * 2. Redistributions in binary form must reproduce the above copyright
41: * notice, this list of conditions and the following disclaimer in the
42: * documentation and/or other materials provided with the distribution.
43: * 3. All advertising materials mentioning features or use of this software
44: * must display the following acknowledgement:
45: * This product includes software developed by the University of
46: * California, Berkeley and its contributors.
47: * 4. Neither the name of the University nor the names of its contributors
48: * may be used to endorse or promote products derived from this software
49: * without specific prior written permission.
50: *
51: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61: * SUCH DAMAGE.
62: *
63: * @(#)fcntl.h 8.3 (Berkeley) 1/21/94
64: */
65:
66: #ifndef _SYS_FCNTL_H_
67: #define _SYS_FCNTL_H_
68:
69: /*
70: * This file includes the definitions for open and fcntl
71: * described by POSIX for <fcntl.h>; it also includes
72: * related kernel definitions.
73: */
74:
75: #ifndef _KERNEL
76: #include <sys/types.h>
77: #endif
78:
79: /*
80: * File status flags: these are used by open(2), fcntl(2).
81: * They are also used (indirectly) in the kernel file structure f_flags,
82: * which is a superset of the open/fcntl flags. Open flags and f_flags
83: * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
84: * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
85: */
86: /* open-only flags */
87: #define O_RDONLY 0x0000 /* open for reading only */
88: #define O_WRONLY 0x0001 /* open for writing only */
89: #define O_RDWR 0x0002 /* open for reading and writing */
90: #define O_ACCMODE 0x0003 /* mask for above modes */
91:
92: /*
93: * Kernel encoding of open mode; separate read and write bits that are
94: * independently testable: 1 greater than the above.
95: *
96: * XXX
97: * FREAD and FWRITE are excluded from the #ifdef _KERNEL so that TIOCFLUSH,
98: * which was documented to use FREAD/FWRITE, continues to work.
99: */
100: #ifndef _POSIX_SOURCE
101: #define FREAD 0x0001
102: #define FWRITE 0x0002
103: #endif
104: #define O_NONBLOCK 0x0004 /* no delay */
105: #define O_APPEND 0x0008 /* set append mode */
106: #ifndef _POSIX_SOURCE
107: #define O_SHLOCK 0x0010 /* open with shared file lock */
108: #define O_EXLOCK 0x0020 /* open with exclusive file lock */
109: #define O_ASYNC 0x0040 /* signal pgrp when data ready */
110: #define O_FSYNC 0x0080 /* synchronous writes */
111: #endif
112: #define O_CREAT 0x0200 /* create if nonexistant */
113: #define O_TRUNC 0x0400 /* truncate to zero length */
114: #define O_EXCL 0x0800 /* error if already exists */
115: #ifdef _KERNEL
116: #define FMARK 0x1000 /* mark during gc() */
117: #define FDEFER 0x2000 /* defer for next gc pass */
118: #define FHASLOCK 0x4000 /* descriptor holds advisory lock */
119: #endif
120:
121: /* defined by POSIX 1003.1; BSD default, so no bit required */
122: #define O_NOCTTY 0 /* don't assign controlling terminal */
123:
124: #ifdef _KERNEL
125: /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
126: #define FFLAGS(oflags) ((oflags) + 1)
127: #define OFLAGS(fflags) ((fflags) - 1)
128:
129: /* bits to save after open */
130: #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
131: /* bits settable by fcntl(F_SETFL, ...) */
132: #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
133: #endif
134:
135: /*
136: * The O_* flags used to have only F* names, which were used in the kernel
137: * and by fcntl. We retain the F* names for the kernel f_flags field
138: * and for backward compatibility for fcntl.
139: */
140: #ifndef _POSIX_SOURCE
141: #define FAPPEND O_APPEND /* kernel/compat */
142: #define FASYNC O_ASYNC /* kernel/compat */
143: #define FFSYNC O_FSYNC /* kernel */
144: #define FNONBLOCK O_NONBLOCK /* kernel */
145: #define FNDELAY O_NONBLOCK /* compat */
146: #define O_NDELAY O_NONBLOCK /* compat */
147: #endif
148:
149: /*
150: * Constants used for fcntl(2)
151: */
152:
153: /* command values */
154: #define F_DUPFD 0 /* duplicate file descriptor */
155: #define F_GETFD 1 /* get file descriptor flags */
156: #define F_SETFD 2 /* set file descriptor flags */
157: #define F_GETFL 3 /* get file status flags */
158: #define F_SETFL 4 /* set file status flags */
159: #ifndef _POSIX_SOURCE
160: #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */
161: #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */
162: #endif
163: #define F_GETLK 7 /* get record locking information */
164: #define F_SETLK 8 /* set record locking information */
165: #define F_SETLKW 9 /* F_SETLK; wait if blocked */
166: #define F_PREALLOCATE 42 /* Preallocate storage */
167: #define F_SETSIZE 43 /* Truncate a file without zeroing space */
168: #define F_RDADVISE 44 /* Issue an advisory read async with no copy to user */
169: #define F_RDAHEAD 45 /* turn read ahead off/on */
170: #define F_READBOOTSTRAP 46 /* Read bootstrap from disk */
171: #define F_WRITEBOOTSTRAP 47 /* Write bootstrap on disk */
172:
173: /* file descriptor flags (F_GETFD, F_SETFD) */
174: #define FD_CLOEXEC 1 /* close-on-exec flag */
175:
176: /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
177: #define F_RDLCK 1 /* shared or read lock */
178: #define F_UNLCK 2 /* unlock */
179: #define F_WRLCK 3 /* exclusive or write lock */
180: #ifdef _KERNEL
181: #define F_WAIT 0x010 /* Wait until lock is granted */
182: #define F_FLOCK 0x020 /* Use flock(2) semantics for lock */
183: #define F_POSIX 0x040 /* Use POSIX semantics for lock */
184: #endif
185:
186: /* allocate flags (F_PREALLOCATE) */
187:
188: #define F_ALLOCATECONTIG 0x00000002 /* allocate contigious space */
189: #define F_ALLOCATEALL 0x00000004 /* allocate all requested space or no space at all */
190:
191: /* Position Modes (fst_posmode) for F_PREALLOCATE */
192:
193: #define F_PEOFPOSMODE 3 /* Make it past all of the SEEK pos modes so that */
194: /* we can keep them in sync should we desire */
195:
196: /*
197: * Advisory file segment locking data type -
198: * information passed to system by user
199: */
200: struct flock {
201: off_t l_start; /* starting offset */
202: off_t l_len; /* len = 0 means until end of file */
203: pid_t l_pid; /* lock owner */
204: short l_type; /* lock type: read/write, etc. */
205: short l_whence; /* type of l_start */
206: };
207:
208:
209: /*
210: * advisory file read data type -
211: * information passed by user to system
212: */
213: struct radvisory {
214: off_t ra_offset;
215: int ra_count;
216: };
217:
218:
219: #ifndef _POSIX_SOURCE
220: /* lock operations for flock(2) */
221: #define LOCK_SH 0x01 /* shared file lock */
222: #define LOCK_EX 0x02 /* exclusive file lock */
223: #define LOCK_NB 0x04 /* don't block when locking */
224: #define LOCK_UN 0x08 /* unlock file */
225: #endif
226:
227: /* fstore_t type used by F_DEALLCOATE and F_PREALLCOATE commands */
228:
229: typedef struct fstore {
230: u_int32_t fst_flags; /* IN: flags word */
231: int fst_posmode; /* IN: indicates use of offset field */
232: off_t fst_offset; /* IN: start of the region */
233: off_t fst_length; /* IN: size of the region */
234: off_t fst_bytesalloc; /* OUT: number of bytes allocated */
235: } fstore_t;
236:
237: /* fbootstraptransfer_t used by F_READBOOTSTRAP and F_WRITEBOOTSTRAP commands */
238:
239: typedef struct fbootstraptransfer {
240: off_t fbt_offset; /* IN: offset to start read/write */
241: size_t fbt_length; /* IN: number of bytes to transfer */
242: void *fbt_buffer; /* IN: buffer to be read/written */
243: } fbootstraptransfer_t;
244:
245: #ifndef _POSIX_SOURCE
246: #define O_POPUP 0x80000000 /* force window to */
247: /* popup on open */
248: #define O_NO_MFS 0x40000000 /* don't use mapped */
249: /* files */
250: #define O_ALERT 0x20000000 /* small, clean popup */
251: /* window */
252: #endif
253:
254: #ifndef _KERNEL
255: #include <sys/cdefs.h>
256:
257: __BEGIN_DECLS
258: int open __P((const char *, int, ...));
259: int creat __P((const char *, mode_t));
260: int fcntl __P((int, int, ...));
261: #ifndef _POSIX_SOURCE
262: int flock __P((int, int));
263: #endif /* !_POSIX_SOURCE */
264: __END_DECLS
265: #endif
266:
267: #endif /* !_SYS_FCNTL_H_ */
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