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/* 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));
}
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