kalarm/rtcwakeaction.cpp

   1 /*
   2  *  rtcwakeaction.cpp  -  KAuth helper application to execute rtcwake commands
   3  *  Program:  kalarm
   4  *  Copyright © 2011 by David Jarvie <djarvie@kde.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License along
  17  *  with this program; if not, write to the Free Software Foundation, Inc.,
  18  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  */
  20
  21 #include "rtcwakeaction.h"
  22
  23 #include <kglobal.h>
  24 #include <klocale.h>
  25 #include <kprocess.h>
  26 #include <kdatetime.h>
  27
  28 #include <QDebug>
  29
  30 #include <stdio.h>
  31
  32 RtcWakeAction::RtcWakeAction()
  33 {
  34     KGlobal::locale()->insertCatalog("kalarm");
  35 }
  36
  37 ActionReply RtcWakeAction::settimer(const QVariantMap& args)
  38 {
  39     unsigned t = args["time"].toUInt();
  40     qDebug() << "RtcWakeAction::settimer(" << t << ")";
  41
  42     // Find the rtcwake executable
  43     QString exe("/usr/sbin/rtcwake");   // default location
  44     FILE* wh = popen("whereis -b rtcwake", "r");
  45     if (wh)
  46     {
  47         char buff[512] = { '\0' };
  48         fgets(buff, sizeof(buff), wh);
  49         pclose(wh);
  50         // The string should be in the form "rtcwake: /path/rtcwake"
  51         char* start = strchr(buff, ':');
  52         if (start)
  53         {
  54             if (*++start == ' ')
  55                 ++start;
  56             char* end = strpbrk(start, " \r\n");
  57             if (end)
  58                 *end = 0;
  59             if (*start)
  60             {
  61                 exe = QString::fromLocal8Bit(start);
  62                 qDebug() << "RtcWakeAction::settimer:" << exe;
  63             }
  64         }
  65     }
  66
  67     // Set the wakeup by executing the rtcwake command
  68     int result = -2;   // default = command not found
  69     KProcess proc;
  70     if (!exe.isEmpty())
  71     {
  72         // The wakeup time is set using a time from now ("-s") in preference to
  73         // an absolute time ("-t") so that if the hardware clock is not in sync
  74         // with the system clock, the alarm will still occur at the correct time.
  75         // The "-m no" option sets the wakeup time without suspending the computer.
  76
  77         // If 't' is zero, the current wakeup is cancelled by setting a new wakeup
  78         // time 2 seconds from now, which will then expire.
  79         unsigned now = KDateTime::currentUtcDateTime().toTime_t();
  80         proc << exe << "-m" << "no" << "-s" << QString::number(t ? t - now : 2);
  81         result = proc.execute(5000);   // allow a timeout of 5 seconds
  82     }
  83     QString errmsg;
  84     switch (result)
  85     {
  86         case 0:
  87             return ActionReply::SuccessReply;
  88         case -2:
  89             errmsg = i18nc("@text/plain", "Could not run <command>%1</command> to set wake from suspend", "rtcwake");
  90             break;
  91         default:
  92             errmsg = i18nc("@text/plain", "Error setting wake from suspend.<nl/>Command was: <command>%1</command><nl/>Error code: %2.", proc.program().join(" "), result);
  93             break;
  94     }
  95     ActionReply reply(ActionReply::HelperError);
  96     reply.setErrorCode(result);
  97     reply.setErrorDescription(errmsg);
  98     qDebug() << "RtcWakeAction::settimer: Code=" << reply.errorCode() << reply.errorDescription();
  99     return reply;
 100 }
 101
 102 KDE4_AUTH_HELPER_MAIN("org.kde.kalarmrtcwake", RtcWakeAction)
 103
 104 // vim: et sw=4: