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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: *
1.1.1.2 ! root 33: * from: @(#)fcntl.h 5.14 (Berkeley) 7/1/91
! 34: * fcntl.h,v 1.3 1993/05/20 16:22:12 cgd Exp
1.1 root 35: */
36:
1.1.1.2 ! root 37: #ifndef _SYS_FCNTL_H_
! 38: #define _SYS_FCNTL_H_
1.1 root 39:
40: /*
41: * This file includes the definitions for open and fcntl
42: * described by POSIX for <fcntl.h>; it also includes
43: * related kernel definitions.
44: */
45:
46: #ifndef KERNEL
47: #include <sys/types.h>
48: #endif
49:
50: /*
51: * File status flags: these are used by open(2), fcntl(2).
52: * They are also used (indirectly) in the kernel file structure f_flags,
53: * which is a superset of the open/fcntl flags. Open flags and f_flags
54: * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
55: * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
56: */
57: /* open-only flags */
58: #define O_RDONLY 0x0000 /* open for reading only */
59: #define O_WRONLY 0x0001 /* open for writing only */
60: #define O_RDWR 0x0002 /* open for reading and writing */
61: #define O_ACCMODE 0x0003 /* mask for above modes */
62:
63: #ifdef KERNEL
64: /*
65: * Kernel encoding of open mode; separate read and write bits
66: * that are independently testable: 1 greater than the above.
67: */
68: #define FREAD 0x0001
69: #define FWRITE 0x0002
70: #endif
71: #define O_NONBLOCK 0x0004 /* no delay */
72: #define O_APPEND 0x0008 /* set append mode */
73: #ifndef _POSIX_SOURCE
74: #define O_SHLOCK 0x0010 /* open with shared file lock */
75: #define O_EXLOCK 0x0020 /* open with exclusive file lock */
76: #define O_ASYNC 0x0040 /* signal pgrp when data ready */
77: #define O_FSYNC 0x0080 /* synchronous writes */
78: #endif
79: #define O_CREAT 0x0200 /* create if nonexistant */
80: #define O_TRUNC 0x0400 /* truncate to zero length */
81: #define O_EXCL 0x0800 /* error if already exists */
82: #ifdef KERNEL
83: #define FMARK 0x1000 /* mark during gc() */
84: #define FDEFER 0x2000 /* defer for next gc pass */
85: #define FHASLOCK 0x4000 /* descriptor holds advisory lock */
86: #endif
87:
88: /* defined by POSIX 1003.1; BSD default, so no bit required */
89: #define O_NOCTTY 0 /* don't assign controlling terminal */
90:
91: #ifdef KERNEL
92: /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
93: #define FFLAGS(oflags) ((oflags) + 1)
94: #define OFLAGS(fflags) ((fflags) - 1)
95:
96: /* bits to save after open */
97: #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
98: /* bits settable by fcntl(F_SETFL, ...) */
99: #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
100: #endif
101:
102: /*
103: * The O_* flags used to have only F* names, which were used in the kernel
104: * and by fcntl. We retain the F* names for the kernel f_flags field
105: * and for backward compatibility for fcntl.
106: */
107: #ifndef _POSIX_SOURCE
108: #define FAPPEND O_APPEND /* kernel/compat */
109: #define FASYNC O_ASYNC /* kernel/compat */
110: #define FFSYNC O_FSYNC /* kernel */
111: #define FNONBLOCK O_NONBLOCK /* kernel */
112: #define FNDELAY O_NONBLOCK /* compat */
113: #define O_NDELAY O_NONBLOCK /* compat */
114: #endif
115:
116: /*
117: * Constants used for fcntl(2)
118: */
119:
120: /* command values */
121: #define F_DUPFD 0 /* duplicate file descriptor */
122: #define F_GETFD 1 /* get file descriptor flags */
123: #define F_SETFD 2 /* set file descriptor flags */
124: #define F_GETFL 3 /* get file status flags */
125: #define F_SETFL 4 /* set file status flags */
126: #ifndef _POSIX_SOURCE
127: #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */
128: #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */
129: #endif
130: #define F_GETLK 7 /* get record locking information */
131: #define F_SETLK 8 /* set record locking information */
132: #define F_SETLKW 9 /* F_SETLK; wait if blocked */
133:
134: /* file descriptor flags (F_GETFD, F_SETFD) */
135: #define FD_CLOEXEC 1 /* close-on-exec flag */
136:
137: /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
138: #define F_RDLCK 1 /* shared or read lock */
139: #define F_UNLCK 2 /* unlock */
140: #define F_WRLCK 3 /* exclusive or write lock */
141: #ifdef KERNEL
142: #define F_WAIT 0x010 /* Wait until lock is granted */
143: #define F_FLOCK 0x020 /* Use flock(2) semantics for lock */
144: #define F_POSIX 0x040 /* Use POSIX semantics for lock */
145: #endif
146:
147: /*
148: * Advisory file segment locking data type -
149: * information passed to system by user
150: */
151: struct flock {
152: short l_type; /* lock type: read/write, etc. */
153: short l_whence; /* type of l_start */
154: off_t l_start; /* starting offset */
155: off_t l_len; /* len = 0 means until end of file */
156: pid_t l_pid; /* lock owner */
157: };
158:
159:
160: #ifndef _POSIX_SOURCE
161: /* lock operations for flock(2) */
162: #define LOCK_SH 0x01 /* shared file lock */
163: #define LOCK_EX 0x02 /* exclusive file lock */
164: #define LOCK_NB 0x04 /* don't block when locking */
165: #define LOCK_UN 0x08 /* unlock file */
166: #endif
167:
168:
169: #ifndef KERNEL
170: #include <sys/cdefs.h>
171:
172: __BEGIN_DECLS
173: int open __P((const char *, int, ...));
174: int creat __P((const char *, mode_t));
175: int fcntl __P((int, int, ...));
176: #ifndef _POSIX_SOURCE
177: int flock __P((int, int));
178: #endif /* !_POSIX_SOURCE */
179: __END_DECLS
180: #endif
181:
1.1.1.2 ! root 182: #endif /* !_SYS_FCNTL_H_ */
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