Mercurial > hg > toybox

view toys/other/free.c @ 953:13916d161ec0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
xzcat: remove XZ_(PREALLOC|SINGLE), inline xz_dec_bcj_create Because we only use XZ_DYNALLOC, there's a bunch of dead code. This patch removes the #ifdef's and if()s associated with support for multiple modes. single_call was only used to store the mode; it is no longer needed. A little bit of reorganization was needed to reduce the number of prototypes. Documentation associated with dead code was dropped. There are still some relics of multiple modes in the continued presence of "XZ_DYNALLOC" and xz_mode. Additionally, I inlined xz_dec_bcj_create; it was called once. This loses about 125 lines, mostly comments.
author Isaac Dunham <idunham@lavabit.com>
date Wed, 17 Jul 2013 17:25:07 -0500
parents 786841fdb1e0
children f0c4b7476118
line wrap: on
line source

/* free.c - Display amount of free and used memory in the system.
 *
 * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>

USE_FREE(NEWTOY(free, "gmkb", TOYFLAG_USR|TOYFLAG_BIN))

config FREE
  bool "free"
  default y
  help
    usage: free [-bkmg]

    Display the total, free and used amount of physical memory and
    swap space.

    -bkmg	Output in bytes (default), KB, MB or GB
*/

#define FOR_free
#include "toys.h"

static unsigned long long convert(unsigned long d, unsigned int iscale,
        unsigned int oscale)
{
  return ((unsigned long long)d*iscale)>>oscale;
}

void free_main(void)
{
  struct sysinfo info;
  unsigned int iscale = 1;
  unsigned int oscale = 0;

  sysinfo(&info);
  if (info.mem_unit) iscale = info.mem_unit;
  if (toys.optflags & FLAG_b) oscale = 0;
  if (toys.optflags & FLAG_k) oscale = 10;
  if (toys.optflags & FLAG_m) oscale = 20;
  if (toys.optflags & FLAG_g) oscale = 30;

  xprintf("\t\ttotal        used        free      shared     buffers\n");
  xprintf("Mem:%17llu%12llu%12llu%12llu%12llu\n",
    convert(info.totalram, iscale, oscale),
    convert(info.totalram-info.freeram, iscale, oscale),
    convert(info.freeram, iscale, oscale),
    convert(info.sharedram, iscale, oscale),
    convert(info.bufferram, iscale, oscale));

  xprintf("-/+ buffers/cache:%15llu%12llu\n",
    convert(info.totalram - info.freeram - info.bufferram, iscale, oscale),
    convert(info.freeram + info.bufferram, iscale, oscale));

  xprintf("Swap:%16llu%12llu%12llu\n",
    convert(info.totalswap, iscale, oscale),
    convert(info.totalswap - info.freeswap, iscale, oscale),
    convert(info.freeswap, iscale, oscale));
}