src/servers/power/power_button_monitor.cpp

   1 /*
   2  * Copyright 2005-2014, Haiku, Inc.
   3  * Distributed under the terms of the MIT license.
   4  *
   5  * Authors:
   6  *              Rene Gollent
   7  *              Nathan Whitehorn
   8  */
   9
  10
  11 #include "power_button_monitor.h"
  12
  13 #include <string.h>
  14
  15 #include <Directory.h>
  16 #include <Messenger.h>
  17 #include <Roster.h>
  18 #include <String.h>
  19
  20 #include <RosterPrivate.h>
  21
  22
  23 static const char* kBasePath = "/dev/power/button";
  24
  25
  26 PowerButtonMonitor::PowerButtonMonitor()
  27         :
  28         fFDs()
  29 {
  30         BDirectory dir;
  31         if (dir.SetTo(kBasePath) != B_OK)
  32                 return;
  33
  34         entry_ref ref;
  35         while (dir.GetNextRef(&ref) == B_OK) {
  36                 if (strncmp(ref.name, "power", 5) == 0) {
  37                         BString path;
  38                         path.SetToFormat("%s/%s", kBasePath, ref.name);
  39                         int fd = open(path.String(), O_RDONLY);
  40                         if (fd > 0)
  41                                 fFDs.insert(fd);
  42                 }
  43         }
  44 }
  45
  46
  47 PowerButtonMonitor::~PowerButtonMonitor()
  48 {
  49         for (std::set<int>::iterator it = fFDs.begin(); it != fFDs.end(); ++it)
  50                 close(*it);
  51 }
  52
  53
  54 void
  55 PowerButtonMonitor::HandleEvent(int fd)
  56 {
  57         uint8 button_pressed;
  58         if (read(fd, &button_pressed, 1) != 1)
  59                 return;
  60
  61         if (button_pressed) {
  62                 BRoster roster;
  63                 BRoster::Private rosterPrivate(roster);
  64
  65                 rosterPrivate.ShutDown(false, false, false);
  66         }
  67 }