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 <KLocalizedString>
  25 #include <kauthactionreply.h>
  26 #include "kalarm_debug.h"
  27
  28 #include <QProcess>
  29 #include <QDateTime>
  30
  31 #include <stdio.h>
  32
  33 RtcWakeAction::RtcWakeAction()
  34 {
  35     KLocalizedString::setApplicationDomain("kalarm");
  36 }
  37
  38 ActionReply RtcWakeAction::settimer(const QVariantMap& args)
  39 {
  40     unsigned t = args[QStringLiteral("time")].toUInt();
  41     qCDebug(KALARM_LOG) << "RtcWakeAction::settimer(" << t << ")";
  42
  43     // Find the rtcwake executable
  44     QString exe(QStringLiteral("/usr/sbin/rtcwake"));   // default location
  45     FILE* wh = popen("whereis -b rtcwake", "r");
  46     if (wh)
  47     {
  48         char buff[512] = { '\0' };
  49         fgets(buff, sizeof(buff), wh);
  50         pclose(wh);
  51         // The string should be in the form "rtcwake: /path/rtcwake"
  52         char* start = strchr(buff, ':');
  53         if (start)
  54         {
  55             if (*++start == ' ')
  56                 ++start;
  57             char* end = strpbrk(start, " \r\n");
  58             if (end)
  59                 *end = 0;
  60             if (*start)
  61             {
  62                 exe = QString::fromLocal8Bit(start);
  63                 qCDebug(KALARM_LOG) << "RtcWakeAction::settimer:" << exe;
  64             }
  65         }
  66     }
  67
  68     // Set the wakeup by executing the rtcwake command
  69     int result = -2;   // default = command not found
  70     QProcess proc;
  71     if (!exe.isEmpty())
  72     {
  73         // The wakeup time is set using a time from now ("-s") in preference to
  74         // an absolute time ("-t") so that if the hardware clock is not in sync
  75         // with the system clock, the alarm will still occur at the correct time.
  76         // The "-m no" option sets the wakeup time without suspending the computer.
  77
  78         // If 't' is zero, the current wakeup is cancelled by setting a new wakeup
  79         // time 2 seconds from now, which will then expire.
  80         unsigned now = QDateTime::currentDateTimeUtc().toTime_t();
  81         proc.setProgram(exe);
  82         proc.setArguments({ QStringLiteral("-m"), QStringLiteral("no"), QStringLiteral("-s"), QString::number(t ? t - now : 2) });
  83         proc.start();
  84         proc.waitForStarted(5000); // allow a timeout of 5 seconds
  85         result = proc.exitCode();
  86     }
  87     QString errmsg;
  88     switch (result)
  89     {
  90         case 0:
  91             return ActionReply::SuccessType;
  92         case -2:
  93             errmsg = xi18nc("@text/plain", "Could not run <command>%1</command> to set wake from suspend", QStringLiteral("rtcwake"));
  94             break;
  95         default:
  96             errmsg = xi18nc("@text/plain", "Error setting wake from suspend.<nl/>Command was: <command>%1 %2</command><nl/>Error code: %3.", proc.program(), proc.arguments().join(QStringLiteral(" ")), result);
  97             break;
  98     }
  99 #if 0 //QT5
 100     ActionReply reply(ActionReply::HelperErrorReply);
 101     reply.setErrorCode(result);
 102     reply.setErrorDescription(errmsg);
 103     qCDebug(KALARM_LOG) , "RtcWakeAction::settimer: Code=" , reply.errorCode() , reply.errorDescription();
 104     return reply;
 105 #else
 106     return 0;
 107 #endif
 108 }
 109
 110 KAUTH_HELPER_MAIN("org.kde.kalarmrtcwake", RtcWakeAction)
 111
 112 // vim: et sw=4: