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126 lines
3.7 KiB
126 lines
3.7 KiB
/***************************************************************************
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* Copyright (C) 2006 by Valentine Sinitsyn *
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* e_val@inbox.ru *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include "cpufreqdconnection.h"
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#include <qdir.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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/* Excerpt from cpufreqd_remote.h (cpufreqd-2.0.0)
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*
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* Copyright (C) 2005 Mattia Dongili <malattia@linux.it>
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* Hrvoje Zeba <hrvoje@boo.mi2.hr>
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*
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* Format:
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* it is an uint32_t used as bitmask
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*
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* 31-16 15-0
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* <command> <arguments>
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*
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* The response may be longer than a single line and is
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* terminated by the RESPONSE_END (see defines).
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*/
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#define CMD_SHIFT 16
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#define ARG_MASK 0x0000ffff
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#define REMOTE_CMD(c) (c >> CMD_SHIFT)
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#define REMOTE_ARG(c) (c & ARG_MASK)
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#define MAKE_COMMAND(cmd, arg) ((cmd << CMD_SHIFT) | arg)
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#define INVALID_CMD 0xffffffff
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/**
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* This class encapsulates cpufreqd connection performed via Unix sockets
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*@author: Valentine Sinitsyn (Valentine.Sinitsyn@usu.ru)
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*/
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CPUFreqdConnection::CPUFreqdConnection(): m_fd(-1) {
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lookup();
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}
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CPUFreqdConnection::~CPUFreqdConnection() {
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}
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bool CPUFreqdConnection::open() {
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struct sockaddr_un sck;
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// socket name is too long - it can't be copied to to sun_path
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if (m_socket.isEmpty() || m_socket.length() >= 108)
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return false;
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if (m_fd > 0)
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close();
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if ((m_fd = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
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return false;
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sck.sun_family = AF_UNIX;
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//It is guaranted that socket.ascii() is shorter than 108 bytes, but we want to be sure
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strncpy(sck.sun_path, m_socket.ascii(), 108);
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if (::connect(m_fd, (struct sockaddr *)&sck, sizeof(sck)) == -1)
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return false;
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return true;
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}
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ssize_t CPUFreqdConnection::read(void *buf, size_t size) {
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return ::read(m_fd, buf, size);
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}
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bool CPUFreqdConnection::write(uint32_t cmd, uint32_t arg) {
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uint32_t command;
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command = MAKE_COMMAND(cmd, arg);
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return (::write(m_fd, &command, sizeof(command)) == (int)sizeof(command));
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}
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void CPUFreqdConnection::close() {
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::close(m_fd);
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m_fd = -1;
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}
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bool CPUFreqdConnection::available() const {
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return !m_socket.isEmpty();
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}
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bool CPUFreqdConnection::lookup() {
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QString candidate;
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QDir tmp("/tmp", "cpufreqd-*", QDir::Time, QDir::Dirs);
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if (tmp.count())
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candidate = "/tmp/" + tmp[0] + "/cpufreqd";
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if (candidate != m_socket) {
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m_socket = candidate;
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return true;
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}
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return false;
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}
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