LXR toybox/toys/android/start.c

   1/* start.c - Start/stop system services.
   2 *
   3 * Copyright 2016 The Android Open Source Project
   4
   5USE_START(NEWTOY(start, "", TOYFLAG_USR|TOYFLAG_SBIN))
   6USE_STOP(NEWTOY(stop, "", TOYFLAG_USR|TOYFLAG_SBIN))
   7
   8config START
   9  bool "start"
  10  depends on TOYBOX_ON_ANDROID
  11  default y
  12  help
  13    usage: start [SERVICE...]
  14
  15    Starts the given system service, or netd/surfaceflinger/zygotes.
  16
  17config STOP
  18  bool "stop"
  19  depends on TOYBOX_ON_ANDROID
  20  default y
  21  help
  22    usage: stop [SERVICE...]
  23
  24    Stop the given system service, or netd/surfaceflinger/zygotes.
  25*/
  26
  27#define FOR_start
  28#include "toys.h"
  29
  30static void start_stop(int start)
  31{
  32  char *property = start ? "ctl.start" : "ctl.stop";
  33  // null terminated in both directions
  34  char *services[] = {0,"netd","surfaceflinger","zygote","zygote_secondary",0},
  35       **ss = toys.optargs;
  36  int direction = 1;
  37
  38  if (getuid()) error_exit("must be root");
  39
  40  if (!*ss) {
  41    // If we don't have optargs, iterate through services forward/backward.
  42    ss = services+1;
  43    if (!start) ss = services+ARRAY_LEN(services)-2, direction = -1;
  44  }
  45
  46  for (; *ss; ss += direction)
  47    if (__system_property_set(property, *ss))
  48      error_exit("failed to set property '%s' to '%s'", property, *ss);
  49}
  50
  51void start_main(void)
  52{
  53  start_stop(1);
  54}
  55
  56void stop_main(void)
  57{
  58  start_stop(0);
  59}
  60