3 * Copyright 2014-2015 Roy Marples <roy@marples.name>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include "dhcpcd-singleton.h"
41 DhcpcdSingleton::DhcpcdSingleton()
47 DhcpcdSingleton::~DhcpcdSingleton()
52 bool DhcpcdSingleton::lock()
57 if (mkdir(DHCPCD_TMP_DIR, DHCPCD_TMP_DIR_PERM) == -1 &&
60 cerr << "dhcpcd-qt: " << "mkdir: " << DHCPCD_TMP_DIR << ": "
61 << strerror(errno) << endl;
65 file = DHCPCD_TMP_DIR;
66 file += "/dhcpcd-qt-";
68 display = getenv("DISPLAY");
69 if (display && *display != '\0' && strchr(display, '/') == NULL) {
74 fd = open(file.c_str(), O_WRONLY | O_CREAT | O_NONBLOCK, 0664);
76 cerr << "dhcpcd-qt: " << "open: " << file << ": "
77 << strerror(errno) << endl;
80 if (flock(fd, LOCK_EX | LOCK_NB) == -1) {
82 cerr << "dhcpcd-qt: " << "flock: " << file << ": "
83 << strerror(errno) << endl;