Annotation of prex-old/include/sys/fcntl.h, Revision 1.1.1.1.2.1
1.1 nbrk 1: /*-
2: * Copyright (c) 1983, 1990, 1993
3: * The Regents of the University of California. All rights reserved.
4: * (c) UNIX System Laboratories, Inc.
5: * All or some portions of this file are derived from material licensed
6: * to the University of California by American Telephone and Telegraph
7: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8: * the permission of UNIX System Laboratories, Inc.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. Neither the name of the University nor the names of its contributors
19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
33: *
34: * @(#)fcntl.h 8.3 (Berkeley) 1/21/94
35: */
36:
37: #ifndef _SYS_FCNTL_H_
38: #define _SYS_FCNTL_H_
39:
40: /*
41: * This file includes the definitions for open and fcntl
42: * described by POSIX for <fcntl.h>.
43: */
44:
45: #include <sys/types.h>
46:
47: /*
48: * File status flags: these are used by open(2), fcntl(2).
49: * They are also used (indirectly) in the kernel file structure f_flags,
50: * which is a superset of the open/fcntl flags. Open flags and f_flags
51: * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
52: * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
53: */
54: /* open-only flags */
55: #define O_RDONLY 0x00000000 /* open for reading only */
56: #define O_WRONLY 0x00000001 /* open for writing only */
57: #define O_RDWR 0x00000002 /* open for reading and writing */
58: #define O_ACCMODE 0x00000003 /* mask for above modes */
59:
60: /*
61: * Kernel encoding of open mode; separate read and write bits that are
62: * independently testable: 1 greater than the above.
63: */
64: #define FREAD 0x00000001
65: #define FWRITE 0x00000002
66:
67: #define O_NONBLOCK 0x00000004 /* no delay */
68: #define O_APPEND 0x00000008 /* set append mode */
69: #define O_SHLOCK 0x00000010 /* open with shared file lock */
70: #define O_EXLOCK 0x00000020 /* open with exclusive file lock */
71: #define O_ASYNC 0x00000040 /* signal pgrp when data ready */
72: #define O_SYNC 0x00000080 /* synchronous writes */
73: #define O_CREAT 0x00000200 /* create if nonexistent */
74: #define O_TRUNC 0x00000400 /* truncate to zero length */
75: #define O_EXCL 0x00000800 /* error if already exists */
76:
1.1.1.1.2.1! nbrk 77: #define FPIPE 0x00010000 /* pipe */
! 78:
1.1 nbrk 79: /* defined by POSIX 1003.1; BSD default, so no bit required */
80: #define O_NOCTTY 0 /* don't assign controlling terminal */
81:
82: /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
83: #define FFLAGS(oflags) ((oflags) + 1)
84: #define OFLAGS(fflags) ((fflags) - 1)
85:
86: /*
87: * Constants used for fcntl(2)
88: */
89:
90: /* command values */
91: #define F_DUPFD 0 /* duplicate file descriptor */
92: #define F_GETFD 1 /* get file descriptor flags */
93: #define F_SETFD 2 /* set file descriptor flags */
94: #define F_GETFL 3 /* get file status flags */
95: #define F_SETFL 4 /* set file status flags */
96: #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */
97: #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */
98: #define F_GETLK 7 /* get record locking information */
99: #define F_SETLK 8 /* set record locking information */
100: #define F_SETLKW 9 /* F_SETLK; wait if blocked */
101:
102: /* file descriptor flags (F_GETFD, F_SETFD) */
103: #define FD_CLOEXEC 1 /* close-on-exec flag */
104:
105: /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
106: #define F_RDLCK 1 /* shared or read lock */
107: #define F_UNLCK 2 /* unlock */
108: #define F_WRLCK 3 /* exclusive or write lock */
109:
110: /*
111: * Advisory file segment locking data type -
112: * information passed to system by user
113: */
114: struct flock {
115: off_t l_start; /* starting offset */
116: off_t l_len; /* len = 0 means until end of file */
117: pid_t l_pid; /* lock owner */
118: short l_type; /* lock type: read/write, etc. */
119: short l_whence; /* type of l_start */
120: };
121:
122: /* lock operations for flock(2) */
123: #define LOCK_SH 0x01 /* shared file lock */
124: #define LOCK_EX 0x02 /* exclusive file lock */
125: #define LOCK_NB 0x04 /* don't block when locking */
126: #define LOCK_UN 0x08 /* unlock file */
127:
128:
129: #include <sys/cdefs.h>
130:
131: __BEGIN_DECLS
132: int open(const char *, int, ...);
133: int creat(const char *, mode_t);
134: int fcntl(int, int, ...);
135: int flock(int, int);
136: __END_DECLS
137:
138: #endif /* !_SYS_FCNTL_H_ */
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to fcntl.h CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / prex-old / include / sys