diff options
| author | Roland McGrath <roland@gnu.org> | 1994-02-25 02:48:41 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1994-02-25 02:48:41 +0000 |
| commit | 64c6833c1853a6af271af873d17c08dcf26e9b44 (patch) | |
| tree | b9cda07caf5feb9c53cd8a1901958424869eff61 /io | |
| parent | eebef3a0d346389121446872b349b2d0e25ae2ed (diff) | |
entered into RCS
Diffstat (limited to 'io')
| -rw-r--r-- | io/fcntl.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/io/fcntl.h b/io/fcntl.h index 855685c099..952b2b51da 100644 --- a/io/fcntl.h +++ b/io/fcntl.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 1992 Free Software Foundation, Inc. +/* 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 @@ -64,6 +64,23 @@ extern int creat __P ((__const char *__file, __mode_t __mode)); #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 */ |