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1.1 root 1: /*-
2: * Copyright (c) 1983, 1990 The Regents of the University of California.
3: * 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
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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: * @(#)fcntl.h 5.14 (Berkeley) 7/1/91
34: */
35:
36: #ifndef _FCNTL_H_
37: #define _FCNTL_H_
38:
39: /*
40: * This file includes the definitions for open and fcntl
41: * described by POSIX for <fcntl.h>; it also includes
42: * related kernel definitions.
43: */
44:
45: #ifndef KERNEL
46: #include <sys/types.h>
47: #endif
48:
49: /*
50: * File status flags: these are used by open(2), fcntl(2).
51: * They are also used (indirectly) in the kernel file structure f_flags,
52: * which is a superset of the open/fcntl flags. Open flags and f_flags
53: * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
54: * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
55: */
56: /* open-only flags */
57: #define O_RDONLY 0x0000 /* open for reading only */
58: #define O_WRONLY 0x0001 /* open for writing only */
59: #define O_RDWR 0x0002 /* open for reading and writing */
60: #define O_ACCMODE 0x0003 /* mask for above modes */
61:
62: #ifdef KERNEL
63: /*
64: * Kernel encoding of open mode; separate read and write bits
65: * that are independently testable: 1 greater than the above.
66: */
67: #define FREAD 0x0001
68: #define FWRITE 0x0002
69: #endif
70: #define O_NONBLOCK 0x0004 /* no delay */
71: #define O_APPEND 0x0008 /* set append mode */
72: #ifndef _POSIX_SOURCE
73: #define O_SHLOCK 0x0010 /* open with shared file lock */
74: #define O_EXLOCK 0x0020 /* open with exclusive file lock */
75: #define O_ASYNC 0x0040 /* signal pgrp when data ready */
76: #define O_FSYNC 0x0080 /* synchronous writes */
77: #endif
78: #define O_CREAT 0x0200 /* create if nonexistant */
79: #define O_TRUNC 0x0400 /* truncate to zero length */
80: #define O_EXCL 0x0800 /* error if already exists */
81: #ifdef KERNEL
82: #define FMARK 0x1000 /* mark during gc() */
83: #define FDEFER 0x2000 /* defer for next gc pass */
84: #define FHASLOCK 0x4000 /* descriptor holds advisory lock */
85: #endif
86:
87: /* defined by POSIX 1003.1; BSD default, so no bit required */
88: #define O_NOCTTY 0 /* don't assign controlling terminal */
89:
90: #ifdef KERNEL
91: /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
92: #define FFLAGS(oflags) ((oflags) + 1)
93: #define OFLAGS(fflags) ((fflags) - 1)
94:
95: /* bits to save after open */
96: #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
97: /* bits settable by fcntl(F_SETFL, ...) */
98: #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
99: #endif
100:
101: /*
102: * The O_* flags used to have only F* names, which were used in the kernel
103: * and by fcntl. We retain the F* names for the kernel f_flags field
104: * and for backward compatibility for fcntl.
105: */
106: #ifndef _POSIX_SOURCE
107: #define FAPPEND O_APPEND /* kernel/compat */
108: #define FASYNC O_ASYNC /* kernel/compat */
109: #define FFSYNC O_FSYNC /* kernel */
110: #define FNONBLOCK O_NONBLOCK /* kernel */
111: #define FNDELAY O_NONBLOCK /* compat */
112: #define O_NDELAY O_NONBLOCK /* compat */
113: #endif
114:
115: /*
116: * Constants used for fcntl(2)
117: */
118:
119: /* command values */
120: #define F_DUPFD 0 /* duplicate file descriptor */
121: #define F_GETFD 1 /* get file descriptor flags */
122: #define F_SETFD 2 /* set file descriptor flags */
123: #define F_GETFL 3 /* get file status flags */
124: #define F_SETFL 4 /* set file status flags */
125: #ifndef _POSIX_SOURCE
126: #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */
127: #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */
128: #endif
129: #define F_GETLK 7 /* get record locking information */
130: #define F_SETLK 8 /* set record locking information */
131: #define F_SETLKW 9 /* F_SETLK; wait if blocked */
132:
133: /* file descriptor flags (F_GETFD, F_SETFD) */
134: #define FD_CLOEXEC 1 /* close-on-exec flag */
135:
136: /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
137: #define F_RDLCK 1 /* shared or read lock */
138: #define F_UNLCK 2 /* unlock */
139: #define F_WRLCK 3 /* exclusive or write lock */
140: #ifdef KERNEL
141: #define F_WAIT 0x010 /* Wait until lock is granted */
142: #define F_FLOCK 0x020 /* Use flock(2) semantics for lock */
143: #define F_POSIX 0x040 /* Use POSIX semantics for lock */
144: #endif
145:
146: /*
147: * Advisory file segment locking data type -
148: * information passed to system by user
149: */
150: struct flock {
151: short l_type; /* lock type: read/write, etc. */
152: short l_whence; /* type of l_start */
153: off_t l_start; /* starting offset */
154: off_t l_len; /* len = 0 means until end of file */
155: pid_t l_pid; /* lock owner */
156: };
157:
158:
159: #ifndef _POSIX_SOURCE
160: /* lock operations for flock(2) */
161: #define LOCK_SH 0x01 /* shared file lock */
162: #define LOCK_EX 0x02 /* exclusive file lock */
163: #define LOCK_NB 0x04 /* don't block when locking */
164: #define LOCK_UN 0x08 /* unlock file */
165: #endif
166:
167:
168: #ifndef KERNEL
169: #include <sys/cdefs.h>
170:
171: __BEGIN_DECLS
172: int open __P((const char *, int, ...));
173: int creat __P((const char *, mode_t));
174: int fcntl __P((int, int, ...));
175: #ifndef _POSIX_SOURCE
176: int flock __P((int, int));
177: #endif /* !_POSIX_SOURCE */
178: __END_DECLS
179: #endif
180:
181: #endif /* !_FCNTL_H_ */
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