| /* O_*, F_*, FD_* bit values for 4.4 BSD. |
| Copyright (C) 1991, 1992, 1997, 2004 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _FCNTL_H |
| #error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead." |
| #endif |
| |
| |
| /* File access modes for `open' and `fcntl'. */ |
| #define O_RDONLY 0 /* Open read-only. */ |
| #define O_WRONLY 1 /* Open write-only. */ |
| #define O_RDWR 2 /* Open read/write. */ |
| |
| |
| /* Bits OR'd into the second argument to open. */ |
| #define O_CREAT 0x0200 /* Create file if it doesn't exist. */ |
| #define O_EXCL 0x0800 /* Fail if file already exists. */ |
| #define O_TRUNC 0x0400 /* Truncate file to zero length. */ |
| /* Apparently not assigning a controlling terminal is the default |
| behavior in BSD, so no bit is required to request that behavior. */ |
| #define O_NOCTTY 0 /* Don't assign a controlling terminal. */ |
| #ifdef __USE_MISC |
| #define O_ASYNC 0x0040 /* Send SIGIO to owner when data is ready. */ |
| #define O_FSYNC 0x0080 /* Synchronous writes. */ |
| #define O_SYNC O_FSYNC |
| #define O_SHLOCK 0x0010 /* Open with shared file lock. */ |
| #define O_EXLOCK 0x0020 /* Open with shared exclusive lock. */ |
| #endif |
| |
| /* File status flags for `open' and `fcntl'. */ |
| #define O_APPEND 0x0008 /* Writes append to the file. */ |
| #define O_NONBLOCK 0x0004 /* Non-blocking I/O. */ |
| |
| #ifdef __USE_BSD |
| #define O_NDELAY O_NONBLOCK |
| #endif |
| |
| #ifdef __USE_BSD |
| /* Bits in the file status flags returned by F_GETFL. |
| These are all the O_* flags, plus FREAD and FWRITE, which are |
| independent bits set by which of O_RDONLY, O_WRONLY, and O_RDWR, was |
| given to `open'. */ |
| #define FREAD 1 |
| #define FWRITE 2 |
| |
| /* Traditional BSD names the O_* bits. */ |
| #define FASYNC O_ASYNC |
| #define FCREAT O_CREAT |
| #define FEXCL O_EXCL |
| #define FTRUNC O_TRUNC |
| #define FNOCTTY O_NOCTTY |
| #define FFSYNC O_FSYNC |
| #define FSYNC O_SYNC |
| #define FAPPEND O_APPEND |
| #define FNONBLOCK O_NONBLOCK |
| #define FNDELAY O_NDELAY |
| #endif |
| |
| /* Mask for file access modes. This is system-dependent in case |
| some system ever wants to define some other flavor of access. */ |
| #define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) |
| |
| /* Values for the second argument to `fcntl'. */ |
| #define F_DUPFD 0 /* Duplicate file descriptor. */ |
| #define F_GETFD 1 /* Get file descriptor flags. */ |
| #define F_SETFD 2 /* Set file descriptor flags. */ |
| #define F_GETFL 3 /* Get file status flags. */ |
| #define F_SETFL 4 /* Set file status flags. */ |
| #if defined __USE_BSD || defined __USE_UNIX98 |
| #define F_GETOWN 5 /* Get owner (receiver of SIGIO). */ |
| #define F_SETOWN 6 /* Set owner (receiver of SIGIO). */ |
| #endif |
| #define F_GETLK 7 /* Get record locking info. */ |
| #define F_SETLK 8 /* Set record locking info (non-blocking). */ |
| #define F_SETLKW 9 /* Set record locking info (blocking). */ |
| |
| /* File descriptor flags used with F_GETFD and F_SETFD. */ |
| #define FD_CLOEXEC 1 /* Close on exec. */ |
| |
| |
| #include <bits/types.h> |
| |
| /* The structure describing an advisory lock. This is the type of the third |
| argument to `fcntl' for the F_GETLK, F_SETLK, and F_SETLKW requests. */ |
| struct flock |
| { |
| short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ |
| short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ |
| __off_t l_start; /* Offset where the lock begins. */ |
| __off_t l_len; /* Size of the locked area; zero means until EOF. */ |
| short int l_pid; /* Process holding the lock. */ |
| }; |
| |
| /* Values for the `l_type' field of a `struct flock'. */ |
| #define F_RDLCK 1 /* Read lock. */ |
| #define F_WRLCK 2 /* Write lock. */ |
| #define F_UNLCK 3 /* Remove lock. */ |