diff options
Diffstat (limited to 'libc/misc/lock/flock.c')
-rw-r--r-- | libc/misc/lock/flock.c | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/libc/misc/lock/flock.c b/libc/misc/lock/flock.c deleted file mode 100644 index 80d15dfd4..000000000 --- a/libc/misc/lock/flock.c +++ /dev/null @@ -1,54 +0,0 @@ -/* Copyright (C) 1992, 1995, 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. */ - -/* This file implements the `flock' function in terms of the POSIX.1 `fcntl' - locking mechanism. In 4BSD, these are two incompatible locking mechanisms, - perhaps with different semantics? */ - -#include <errno.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/file.h> - -/* Apply or remove an advisory lock, according to OPERATION, - on the file FD refers to. */ -int flock( int fd, int operation) -{ - struct flock lbuf; - - switch (operation & ~LOCK_NB) { - case LOCK_SH: - lbuf.l_type = F_RDLCK; - break; - case LOCK_EX: - lbuf.l_type = F_WRLCK; - break; - case LOCK_UN: - lbuf.l_type = F_UNLCK; - break; - default: - __set_errno(EINVAL); - return -1; - } - - lbuf.l_whence = SEEK_SET; - lbuf.l_start = lbuf.l_len = 0L; /* Lock the whole file. */ - - return fcntl(fd, (operation & LOCK_NB) ? F_SETLK : F_SETLKW, &lbuf); -} - |