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/*
* Amanda, The Advanced Maryland Automatic Network Disk Archiver
* Copyright (c) 1991-1998 University of Maryland at College Park
* Copyright (c) 2007-2012 Zmanda, Inc. All Rights Reserved.
* Copyright (c) 2013-2016 Carbonite, Inc. All Rights Reserved.
* All Rights Reserved.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of U.M. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. U.M. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Authors: the Amanda Development Team. Its members are listed in a
* file named AUTHORS, in the root directory of this distribution.
*/
/* moved from amflock.c by Dustin J. Mitchell <dustin@zmanda.com> */
#include "amanda.h"
static int
posix_lock(
int fd,
G_GNUC_UNUSED char *resource)
{
struct flock lock;
lock.l_type = F_WRLCK;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0; /* to EOF */
return fcntl(fd, F_SETLKW, &lock);
}
static int
posix_rolock(
int fd,
G_GNUC_UNUSED char *resource)
{
struct flock lock;
lock.l_type = F_RDLCK;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0; /* to EOF */
return fcntl(fd, F_SETLKW, &lock);
}
static int
posix_unlock(
int fd,
G_GNUC_UNUSED char *resource)
{
struct flock lock;
lock.l_type = F_UNLCK;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0; /* to EOF */
return fcntl(fd, F_SETLK, &lock);
}
amflock_impl_t amflock_posix_impl = {
posix_lock,
posix_rolock,
posix_unlock,
"posix"
};
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