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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
23: /*-
24: * Copyright (c) 1983, 1990, 1993
25: * The Regents of the University of California. All rights reserved.
26: * (c) UNIX System Laboratories, Inc.
27: * All or some portions of this file are derived from material licensed
28: * to the University of California by American Telephone and Telegraph
29: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
30: * the permission of UNIX System Laboratories, Inc.
31: *
32: * Redistribution and use in source and binary forms, with or without
33: * modification, are permitted provided that the following conditions
34: * are met:
35: * 1. Redistributions of source code must retain the above copyright
36: * notice, this list of conditions and the following disclaimer.
37: * 2. Redistributions in binary form must reproduce the above copyright
38: * notice, this list of conditions and the following disclaimer in the
39: * documentation and/or other materials provided with the distribution.
40: * 3. All advertising materials mentioning features or use of this software
41: * must display the following acknowledgement:
42: * This product includes software developed by the University of
43: * California, Berkeley and its contributors.
44: * 4. Neither the name of the University nor the names of its contributors
45: * may be used to endorse or promote products derived from this software
46: * without specific prior written permission.
47: *
48: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58: * SUCH DAMAGE.
59: *
60: * @(#)fcntl.h 8.3 (Berkeley) 1/21/94
61: */
62: /* HISTORY
63: * 05-Aug-98 CHW at Apple Added support for new Truncate with no zero fill
64: * function.
65: * 07-Jul-98 CHW at Apple Added new flags for preallocation support
66: * 01-27-98 Clark Warner (warner_c) at Apple
67: * Modied the fcntl system call to add support for the preallocation
68: * funtionality supported by HFS
69: * 02-25-00 Clark Warner (warner_c) at Apple
70: * Added flags for copy file system call
71: */
72:
73:
74: #ifndef _SYS_FCNTL_H_
75: #define _SYS_FCNTL_H_
76:
77: /*
78: * This file includes the definitions for open and fcntl
79: * described by POSIX for <fcntl.h>; it also includes
80: * related kernel definitions.
81: */
82:
83: #ifndef KERNEL
84: #include <sys/types.h>
85: #endif
86:
87: /*
88: * File status flags: these are used by open(2), fcntl(2).
89: * They are also used (indirectly) in the kernel file structure f_flags,
90: * which is a superset of the open/fcntl flags. Open flags and f_flags
91: * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
92: * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
93: */
94: /* open-only flags */
95: #define O_RDONLY 0x0000 /* open for reading only */
96: #define O_WRONLY 0x0001 /* open for writing only */
97: #define O_RDWR 0x0002 /* open for reading and writing */
98: #define O_ACCMODE 0x0003 /* mask for above modes */
99:
100: /*
101: * Kernel encoding of open mode; separate read and write bits that are
102: * independently testable: 1 greater than the above.
103: *
104: * XXX
105: * FREAD and FWRITE are excluded from the #ifdef KERNEL so that TIOCFLUSH,
106: * which was documented to use FREAD/FWRITE, continues to work.
107: */
108: #ifndef _POSIX_SOURCE
109: #define FREAD 0x0001
110: #define FWRITE 0x0002
111: #endif
112: #define O_NONBLOCK 0x0004 /* no delay */
113: #define O_APPEND 0x0008 /* set append mode */
114: #ifndef _POSIX_SOURCE
115: #define O_SHLOCK 0x0010 /* open with shared file lock */
116: #define O_EXLOCK 0x0020 /* open with exclusive file lock */
117: #define O_ASYNC 0x0040 /* signal pgrp when data ready */
118: #define O_FSYNC 0x0080 /* synchronous writes */
119: #endif
120: #define O_CREAT 0x0200 /* create if nonexistant */
121: #define O_TRUNC 0x0400 /* truncate to zero length */
122: #define O_EXCL 0x0800 /* error if already exists */
123: #ifdef KERNEL
124: #define FMARK 0x1000 /* mark during gc() */
125: #define FDEFER 0x2000 /* defer for next gc pass */
126: #define FHASLOCK 0x4000 /* descriptor holds advisory lock */
127: #endif
128:
129: /* defined by POSIX 1003.1; BSD default, so no bit required */
130: #define O_NOCTTY 0 /* don't assign controlling terminal */
131:
132: #ifdef KERNEL
133: /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
134: #define FFLAGS(oflags) ((oflags) + 1)
135: #define OFLAGS(fflags) ((fflags) - 1)
136:
137: /* bits to save after open */
138: #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
139: /* bits settable by fcntl(F_SETFL, ...) */
140: #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
141: #endif
142:
143: /*
144: * The O_* flags used to have only F* names, which were used in the kernel
145: * and by fcntl. We retain the F* names for the kernel f_flags field
146: * and for backward compatibility for fcntl.
147: */
148: #ifndef _POSIX_SOURCE
149: #define FAPPEND O_APPEND /* kernel/compat */
150: #define FASYNC O_ASYNC /* kernel/compat */
151: #define FFSYNC O_FSYNC /* kernel */
152: #define FNONBLOCK O_NONBLOCK /* kernel */
153: #define FNDELAY O_NONBLOCK /* compat */
154: #define O_NDELAY O_NONBLOCK /* compat */
155: #endif
156:
157: /*
158: * Flags used for copyfile(2)
159: */
160:
161: #ifndef _POSIX_SOURCE
162: #define CPF_OVERWRITE 1
163: #define CPF_IGNORE_MODE 2
164: #define CPF_MASK (CPF_OVERWRITE|CPF_IGNORE_MODE)
165: #endif
166:
167: /*
168: * Constants used for fcntl(2)
169: */
170:
171: /* command values */
172: #define F_DUPFD 0 /* duplicate file descriptor */
173: #define F_GETFD 1 /* get file descriptor flags */
174: #define F_SETFD 2 /* set file descriptor flags */
175: #define F_GETFL 3 /* get file status flags */
176: #define F_SETFL 4 /* set file status flags */
177: #ifndef _POSIX_SOURCE
178: #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */
179: #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */
180: #endif
181: #define F_GETLK 7 /* get record locking information */
182: #define F_SETLK 8 /* set record locking information */
183: #define F_SETLKW 9 /* F_SETLK; wait if blocked */
184: #define F_PREALLOCATE 42 /* Preallocate storage */
185: #define F_SETSIZE 43 /* Truncate a file without zeroing space */
186: #define F_RDADVISE 44 /* Issue an advisory read async with no copy to user */
187: #define F_RDAHEAD 45 /* turn read ahead off/on */
188: #define F_READBOOTSTRAP 46 /* Read bootstrap from disk */
189: #define F_WRITEBOOTSTRAP 47 /* Write bootstrap on disk */
190:
191: /* file descriptor flags (F_GETFD, F_SETFD) */
192: #define FD_CLOEXEC 1 /* close-on-exec flag */
193:
194: /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
195: #define F_RDLCK 1 /* shared or read lock */
196: #define F_UNLCK 2 /* unlock */
197: #define F_WRLCK 3 /* exclusive or write lock */
198: #ifdef KERNEL
199: #define F_WAIT 0x010 /* Wait until lock is granted */
200: #define F_FLOCK 0x020 /* Use flock(2) semantics for lock */
201: #define F_POSIX 0x040 /* Use POSIX semantics for lock */
202: #endif
203:
204: /* allocate flags (F_PREALLOCATE) */
205:
206: #define F_ALLOCATECONTIG 0x00000002 /* allocate contigious space */
207: #define F_ALLOCATEALL 0x00000004 /* allocate all requested space or no space at all */
208:
209: /* Position Modes (fst_posmode) for F_PREALLOCATE */
210:
211: #define F_PEOFPOSMODE 3 /* Make it past all of the SEEK pos modes so that */
212: /* we can keep them in sync should we desire */
213:
214: /*
215: * Advisory file segment locking data type -
216: * information passed to system by user
217: */
218: struct flock {
219: off_t l_start; /* starting offset */
220: off_t l_len; /* len = 0 means until end of file */
221: pid_t l_pid; /* lock owner */
222: short l_type; /* lock type: read/write, etc. */
223: short l_whence; /* type of l_start */
224: };
225:
226:
227: /*
228: * advisory file read data type -
229: * information passed by user to system
230: */
231: struct radvisory {
232: off_t ra_offset;
233: int ra_count;
234: };
235:
236:
237: #ifndef _POSIX_SOURCE
238: /* lock operations for flock(2) */
239: #define LOCK_SH 0x01 /* shared file lock */
240: #define LOCK_EX 0x02 /* exclusive file lock */
241: #define LOCK_NB 0x04 /* don't block when locking */
242: #define LOCK_UN 0x08 /* unlock file */
243: #endif
244:
245: /* fstore_t type used by F_DEALLCOATE and F_PREALLCOATE commands */
246:
247: typedef struct fstore {
248: u_int32_t fst_flags; /* IN: flags word */
249: int fst_posmode; /* IN: indicates use of offset field */
250: off_t fst_offset; /* IN: start of the region */
251: off_t fst_length; /* IN: size of the region */
252: off_t fst_bytesalloc; /* OUT: number of bytes allocated */
253: } fstore_t;
254:
255: /* fbootstraptransfer_t used by F_READBOOTSTRAP and F_WRITEBOOTSTRAP commands */
256:
257: typedef struct fbootstraptransfer {
258: off_t fbt_offset; /* IN: offset to start read/write */
259: size_t fbt_length; /* IN: number of bytes to transfer */
260: void *fbt_buffer; /* IN: buffer to be read/written */
261: } fbootstraptransfer_t;
262:
263: #ifndef _POSIX_SOURCE
264: #define O_POPUP 0x80000000 /* force window to */
265: /* popup on open */
266: #define O_NO_MFS 0x40000000 /* don't use mapped */
267: /* files */
268: #define O_ALERT 0x20000000 /* small, clean popup */
269: /* window */
270: #endif
271:
272: #ifndef KERNEL
273: #include <sys/cdefs.h>
274:
275: __BEGIN_DECLS
276: int open __P((const char *, int, ...));
277: int creat __P((const char *, mode_t));
278: int fcntl __P((int, int, ...));
279: #ifndef _POSIX_SOURCE
280: int flock __P((int, int));
281: #endif /* !_POSIX_SOURCE */
282: __END_DECLS
283: #endif
284:
285: #endif /* !_SYS_FCNTL_H_ */
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