Attempt to represent the S^2->S^3 header reorganisation as a series of "hg rename" operations
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36 * @(#)fcntl.h 8.3 (Berkeley) 1/21/94
37 * $FreeBSD: src/sys/sys/fcntl.h,v 1.16 2004/04/07 04:19:49 imp Exp $
44 * This file includes the definitions for open and fcntl
45 * described by POSIX for <fcntl.h>; it also includes
46 * related kernel definitions.
49 #include <sys/cdefs.h>
50 #include <sys/_types.h>
52 #ifndef _MODE_T_DECLARED
53 typedef __mode_t mode_t;
54 #define _MODE_T_DECLARED
57 #ifndef _OFF_T_DECLARED
58 typedef __off_t off_t;
59 #define _OFF_T_DECLARED
62 #ifndef _PID_T_DECLARED
63 typedef __pid_t pid_t;
64 #define _PID_T_DECLARED
68 * File status flags: these are used by open(2), fcntl(2).
69 * They are also used (indirectly) in the kernel file structure f_flags,
70 * which is a superset of the open/fcntl flags. Open flags and f_flags
71 * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
72 * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
75 #define O_RDONLY 0x0000 /* open for reading only */
76 #define O_WRONLY 0x0001 /* open for writing only */
77 #define O_RDWR 0x0002 /* open for reading and writing */
78 #define O_ACCMODE 0x0003 /* mask for above modes */
81 * Kernel encoding of open mode; separate read and write bits that are
82 * independently testable: 1 greater than the above.
85 * FREAD and FWRITE are excluded from the #ifdef _KERNEL so that TIOCFLUSH,
86 * which was documented to use FREAD/FWRITE, continues to work.
92 #define O_NONBLOCK 0x0004 /* no delay */
93 #define O_APPEND 0x0008 /* set append mode */
95 #define O_SHLOCK 0x0010 /* open with shared file lock */
96 #define O_EXLOCK 0x0020 /* open with exclusive file lock */
97 #define O_ASYNC 0x0040 /* signal pgrp when data ready */
98 #define O_FSYNC 0x0080 /* synchronous writes */
100 #define O_SYNC 0x0080 /* POSIX synonym for O_FSYNC */
102 #define O_NOFOLLOW 0x0100 /* don't follow symlinks */
104 #define O_CREAT 0x0200 /* create if nonexistent */
105 #define O_TRUNC 0x0400 /* truncate to zero length */
106 #define O_EXCL 0x0800 /* error if already exists */
108 #define FHASLOCK 0x4000 /* descriptor holds advisory lock */
111 /* Defined by POSIX 1003.1; BSD default, but must be distinct from O_RDONLY. */
112 #define O_NOCTTY 0x8000 /* don't assign controlling terminal */
115 /* Attempt to bypass buffer cache */
116 #define O_DIRECT 0x00010000
119 //Copied from MRT1.0 fcntl.h header
120 #define _FBUFFERED 0x10000 /* buffer at the interface to the file system */
121 #define _FBINARY 0x10000
122 #define _FTEXT 0x20000
123 #define O_BINARY _FBINARY
124 #define O_TEXT _FTEXT
125 #define O_BUFFERED _FBUFFERED
128 * XXX missing O_DSYNC, O_RSYNC.
132 /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
133 #define FFLAGS(oflags) ((oflags) + 1)
134 #define OFLAGS(fflags) ((fflags) - 1)
136 /* bits to save after open */
137 #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK|O_DIRECT)
138 /* bits settable by fcntl(F_SETFL, ...) */
139 #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FPOSIXSHM|O_DIRECT)
143 * The O_* flags used to have only F* names, which were used in the kernel
144 * and by fcntl. We retain the F* names for the kernel f_flag field
145 * and for backward compatibility for fcntl. These flags are deprecated.
148 #define FAPPEND O_APPEND /* kernel/compat */
149 #define FASYNC O_ASYNC /* kernel/compat */
150 #define FFSYNC O_FSYNC /* kernel */
151 #define FNONBLOCK O_NONBLOCK /* kernel */
152 #define FNDELAY O_NONBLOCK /* compat */
153 #define O_NDELAY O_NONBLOCK /* compat */
157 * We are out of bits in f_flag (which is a short). However,
158 * the flag bits not set in FMASK are only meaningful in the
159 * initial open syscall. Those bits can thus be given a
160 * different meaning for fcntl(2).
165 * Set by shm_open(3) to get automatic MAP_ASYNC behavior
166 * for POSIX shared memory objects (which are otherwise
167 * implemented as plain files).
169 #define FPOSIXSHM O_NOFOLLOW
172 /*SYMBIAN Flag for tmpfile removal*/
174 #define O_TMPFILE 0x10000000 /* flag for cleanup of tmpfiles*/
175 #endif //__SYMBIAN32__
178 * Constants used for fcntl(2)
182 #define F_DUPFD 0 /* duplicate file descriptor */
183 #define F_GETFD 1 /* get file descriptor flags */
184 #define F_SETFD 2 /* set file descriptor flags */
185 #define F_GETFL 3 /* get file status flags */
186 #define F_SETFL 4 /* set file status flags */
187 #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
188 #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */
189 #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */
191 #define F_GETLK 7 /* get record locking information */
192 #define F_SETLK 8 /* set record locking information */
193 #define F_SETLKW 9 /* F_SETLK; wait if blocked */
195 /* file descriptor flags (F_GETFD, F_SETFD) */
196 #define FD_CLOEXEC 1 /* close-on-exec flag */
198 /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
199 #define F_RDLCK 1 /* shared or read lock */
200 #define F_UNLCK 2 /* unlock */
201 #define F_WRLCK 3 /* exclusive or write lock */
203 #define F_WAIT 0x010 /* Wait until lock is granted */
204 #define F_FLOCK 0x020 /* Use flock(2) semantics for lock */
205 #define F_POSIX 0x040 /* Use POSIX semantics for lock */
209 * Advisory file segment locking data type -
210 * information passed to system by user
213 off_t l_start; /* starting offset */
214 off_t l_len; /* len = 0 means until end of file */
215 pid_t l_pid; /* lock owner */
216 short l_type; /* lock type: read/write, etc. */
217 short l_whence; /* type of l_start */
222 /* lock operations for flock(2) */
223 #define LOCK_SH 0x01 /* shared file lock */
224 #define LOCK_EX 0x02 /* exclusive file lock */
225 #define LOCK_NB 0x04 /* don't block when locking */
226 #define LOCK_UN 0x08 /* unlock file */
230 * XXX missing posix_fadvise() and posix_fallocate(), and POSIX_FADV_* macros.
235 IMPORT_C int open(const char *, int, ...);
236 IMPORT_C int creat(const char *, mode_t);
237 IMPORT_C int fcntl(int, int, ...);
244 #endif /* !_SYS_FCNTL_H_ */