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Diffstat (limited to 'sysdeps/mach/hurd/bits/fcntl.h')
| -rw-r--r-- | sysdeps/mach/hurd/bits/fcntl.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/bits/fcntl.h b/sysdeps/mach/hurd/bits/fcntl.h new file mode 100644 index 0000000000..4983b338ae --- /dev/null +++ b/sysdeps/mach/hurd/bits/fcntl.h @@ -0,0 +1,175 @@ +/* O_*, F_*, FD_* bit values for GNU. + Copyright (C) 1993, 1994, 1996, 1997 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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. These are understood by io servers; they can be + passed in `dir_lookup', and are returned by `io_get_openmodes'. + Consequently they can be passed to `open', `hurd_file_name_lookup', and + `file_name_lookup'; and are returned by `fcntl' with the F_GETFL + command. */ + +/* In GNU, read and write are bits (unlike BSD). */ +#ifdef __USE_GNU +#define O_READ O_RDONLY /* Open for reading. */ +#define O_WRITE O_WRONLY /* Open for writing. */ +#define O_EXEC 0x0004 /* Open for execution. */ +#define O_NORW 0 /* Open without R/W access. */ +#endif +/* POSIX.1 standard names. */ +#define O_RDONLY 0x0001 /* Open read-only. */ +#define O_WRONLY 0x0002 /* Open write-only. */ +#define O_RDWR (O_RDONLY|O_WRONLY) /* Open for reading and writing. */ +#define O_ACCMODE O_RDWR /* Mask for file access modes. */ + + + +/* File name translation flags. These are understood by io servers; + they can be passed in `dir_lookup', and consequently to `open', + `hurd_file_name_lookup', and `file_name_lookup'. */ + +#define O_CREAT 0x0010 /* Create file if it doesn't exist. */ +#define O_EXCL 0x0020 /* Fail if file already exists. */ +#ifdef __USE_GNU +#define O_NOLINK 0x0040 /* No name mappings on final component. */ +#define O_NOTRANS 0x0080 /* No translator on final component. */ +#endif + + +/* I/O operating modes. These are understood by io servers; they can be + passed in `dir_lookup' and set or fetched with `io_*_openmodes'. + Consequently they can be passed to `open', `hurd_file_name_lookup', + `file_name_lookup', and `fcntl' with the F_SETFL command; and are + returned by `fcntl' with the F_GETFL command. */ + +#define O_APPEND 0x0100 /* Writes always append to the file. */ +#ifdef __USE_BSD +#define O_ASYNC 0x0200 /* Send SIGIO to owner when data is ready. */ +#define O_FSYNC 0x0400 /* Synchronous writes. */ +#define O_SYNC O_FSYNC +#endif +#ifdef __USE_GNU +#define O_NOATIME 0x0800 /* Don't set access time on read (owner). */ +#endif +#ifdef __USE_MISC +#define O_SHLOCK 0x00020000 /* Open with shared file lock. */ +#define O_EXLOCK 0x00040000 /* Open with exclusive file lock. */ +#endif + + +/* The name O_NONBLOCK is unfortunately overloaded; it is both a file name + translation flag and an I/O operating mode. O_NDELAY is the deprecated + BSD name for the same flag, overloaded in the same way. + + When used in `dir_lookup' (and consequently `open', `hurd_file_name_lookup', + or `file_name_lookup'), O_NONBLOCK says the open should return immediately + instead of blocking for any significant length of time (e.g., to wait + for carrier detect on a serial line). It is also saved as an I/O + operating mode, and after open has the following meaning. + + When used in `io_*_openmodes' (and consequently `fcntl' with the F_SETFL + command), the O_NONBLOCK flag means to do nonblocking i/o: any i/o + operation that would block for any significant length of time will instead + fail with EAGAIN. */ + +#define O_NONBLOCK 0x0008 /* Non-blocking open or non-blocking I/O. */ +#ifdef __USE_BSD +#define O_NDELAY O_NONBLOCK /* Deprecated. */ +#endif + + +#ifdef __USE_GNU +/* Mask of bits which are understood by io servers. */ +#define O_HURD (0xffff | O_EXLOCK | O_SHLOCK) +#endif + + +/* Open-time action flags. These are understood by `hurd_file_name_lookup' + and consequently by `open' and `file_name_lookup'. They are not preserved + once the file has been opened. */ + +#define O_TRUNC 0x00010000 /* Truncate file to zero length. */ + + +/* Controlling terminal flags. These are understood only by `open', + and are not preserved once the file has been opened. */ + +#ifdef __USE_GNU +#define O_IGNORE_CTTY 0x00080000 /* Don't do any ctty magic at all. */ +#endif +/* `open' never assigns a controlling terminal in GNU. */ +#define O_NOCTTY 0 /* Don't assign a controlling terminal. */ + + +#ifdef __USE_BSD +/* Bits in the file status flags returned by F_GETFL. */ +#define FREAD O_RDONLY +#define FWRITE O_WRONLY + +/* 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 + + +/* 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. */ +#ifdef __USE_BSD +#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 <gnu/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 + { + int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ + 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. */ + __pid_t 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. */ |