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Diffstat (limited to 'io/fcntl.h')
| -rw-r--r-- | io/fcntl.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/io/fcntl.h b/io/fcntl.h new file mode 100644 index 0000000..952b2b5 --- /dev/null +++ b/io/fcntl.h @@ -0,0 +1,86 @@ +/* Copyright (C) 1991, 1992, 1994 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, 1992 Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +/* + * POSIX Standard: 6.5 File Control Operations <fcntl.h> + */ + +#ifndef _FCNTL_H + +#define _FCNTL_H 1 +#include <features.h> + +/* This must be early so <fcntlbits.h> can define types winningly. */ +__BEGIN_DECLS + +/* Get the definitions of O_*, F_*, FD_*: all the + numbers and flag bits for `open', `fcntl', et al. */ +#include <fcntlbits.h> + +#ifdef __USE_MISC +#ifndef R_OK /* Verbatim from <unistd.h>. Ugh. */ +/* Values for the second argument to access. + These may be OR'd together. */ +#define R_OK 4 /* Test for read permission. */ +#define W_OK 2 /* Test for write permission. */ +#define X_OK 1 /* Test for execute permission. */ +#define F_OK 0 /* Test for existence. */ +#endif +#endif /* Use misc. */ + + +/* Do the file control operation described by CMD on FD. + The remaining arguments are interpreted depending on CMD. */ +extern int __fcntl __P ((int __fd, int __cmd, ...)); +extern int fcntl __P ((int __fd, int __cmd, ...)); + +/* Open FILE and return a new file descriptor for it, or -1 on error. + OFLAG determines the type of access used. If O_CREAT is on OFLAG, + the third argument is taken as a `mode_t', the mode of the created file. */ +extern int __open __P ((__const char *__file, int __oflag,...)); +extern int open __P ((__const char *__file, int __oflag,...)); + +/* Create and open FILE, with mode MODE. + This takes an `int' MODE argument because that is + what `mode_t' will be widened to. */ +extern int creat __P ((__const char *__file, __mode_t __mode)); + +#ifdef __OPTIMIZE__ +#define creat(file, m) __open((file), O_WRONLY|O_CREAT|O_TRUNC, (m)) +#endif /* Optimizing. */ + +#if defined (__USE_MISC) && !defined (F_LOCK) +/* NOTE: These declarations also appear in <unistd.h>; be sure to keep both + files consistent. Some systems have them there and some here, and some + software depends on the macros being defined without including both. */ + +/* `lockf' is a simpler interface to the locking facilities of `fcntl'. + LEN is always relative to the current file position. + The CMD argument is one of the following. */ + +#define F_ULOCK 0 /* Unlock a previously locked region. */ +#define F_LOCK 1 /* Lock a region for exclusive use. */ +#define F_TLOCK 2 /* Test and lock a region for exclusive use. */ +#define F_TEST 3 /* Test a region for other processes locks. */ + +extern int lockf __P ((int __fd, int __cmd, __off_t __len)); +#endif + +__END_DECLS + +#endif /* fcntl.h */ |