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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2015 Joyent, Inc.
*/
#include <sys/feature_tests.h>
#include "lint.h"
#include <sys/types.h>
#include <sys/file.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
int
flock(int fildes, int operation)
{
struct flock64 l;
int op;
int rv;
l.l_whence = SEEK_SET;
l.l_start = 0;
l.l_len = 0;
l.l_sysid = 0;
l.l_pid = 0;
switch (operation & ~LOCK_NB) {
case LOCK_UN:
if (operation & LOCK_NB) {
errno = EINVAL;
return (-1);
}
l.l_type = F_UNLCK;
rv = fcntl(fildes, F_FLOCK, &l);
break;
case LOCK_EX:
case LOCK_SH:
l.l_type = ((operation & ~LOCK_NB) == LOCK_EX) ?
F_WRLCK : F_RDLCK;
op = (operation & LOCK_NB) ? F_FLOCK : F_FLOCKW;
rv = fcntl(fildes, op, &l);
break;
default:
errno = EINVAL;
return (-1);
}
return (rv);
}
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