7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek/*
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek * This file and its contents are supplied under the terms of the
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek * Common Development and Distribution License ("CDDL"), version 1.0.
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek * You may only use this file in accordance with the terms of version
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek * 1.0 of the CDDL.
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek *
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek * A full copy of the text of the CDDL should have accompanied this
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek * source. A copy of the CDDL is also available via the Internet at
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek * http://www.illumos.org/license/CDDL.
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek */
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek/*
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek * Copyright 2015 Joyent, Inc.
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek */
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek#include <sys/feature_tests.h>
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek#include "lint.h"
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek#include <sys/types.h>
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek#include <sys/file.h>
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek#include <unistd.h>
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek#include <errno.h>
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek#include <fcntl.h>
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinekint
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinekflock(int fildes, int operation)
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek{
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek struct flock64 l;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek int op;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek int rv;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek l.l_whence = SEEK_SET;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek l.l_start = 0;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek l.l_len = 0;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek l.l_sysid = 0;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek l.l_pid = 0;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek switch (operation & ~LOCK_NB) {
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek case LOCK_UN:
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek if (operation & LOCK_NB) {
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek errno = EINVAL;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek return (-1);
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek }
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek l.l_type = F_UNLCK;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek rv = fcntl(fildes, F_FLOCK, &l);
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek break;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek case LOCK_EX:
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek case LOCK_SH:
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek l.l_type = ((operation & ~LOCK_NB) == LOCK_EX) ?
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek F_WRLCK : F_RDLCK;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek op = (operation & LOCK_NB) ? F_FLOCK : F_FLOCKW;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek rv = fcntl(fildes, op, &l);
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek break;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek default:
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek errno = EINVAL;
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek return (-1);
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek }
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek return (rv);
7a5aac98bc37534537d4896efd4efd30627d221eJerry Jelinek}