LXR toybox/toys/other/swapon.c

   1/* swapon.c - Enable region for swapping
   2 *
   3 * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
   4
   5USE_SWAPON(NEWTOY(swapon, "<1>1p#<0>32767d", TOYFLAG_SBIN|TOYFLAG_NEEDROOT))
   6
   7config SWAPON
   8  bool "swapon"
   9  default y
  10  help
  11    usage: swapon [-d] [-p priority] filename
  12
  13    Enable swapping on a given device/file.
  14
  15    -d  Discard freed SSD pages
  16    -p  Priority (highest priority areas allocated first)
  17*/
  18
  19#define FOR_swapon
  20#include "toys.h"
  21
  22GLOBALS(
  23  long p;
  24)
  25
  26void swapon_main(void)
  27{
  28  // 0x70000 = SWAP_FLAG_DISCARD|SWAP_FLAG_DISCARD_ONCE|SWAP_FLAG_DISCARD_PAGES
  29  int flags = (toys.optflags&FLAG_d)*0x70000;
  30
  31  if (toys.optflags)
  32    flags |= SWAP_FLAG_PREFER | (TT.p << SWAP_FLAG_PRIO_SHIFT);
  33
  34  if (swapon(*toys.optargs, flags))
  35    perror_exit("Couldn't swapon '%s'", *toys.optargs);
  36}
  37