/* 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)); }