1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini free implementation for busybox 4 * 5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> 6 * 7 * Licensed under the GPL version 2, see the file LICENSE in this tarball. 8 */ 9 10/* getopt not needed */ 11 12#include "libbb.h" 13 14int free_main(int argc, char **argv); 15int free_main(int argc, char **argv) 16{ 17 struct sysinfo info; 18 sysinfo(&info); 19 20 /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */ 21 if (info.mem_unit == 0) { 22 info.mem_unit=1; 23 } 24 if (info.mem_unit == 1) { 25 info.mem_unit=1024; 26 27 /* TODO: Make all this stuff not overflow when mem >= 4 Gib */ 28 info.totalram/=info.mem_unit; 29 info.freeram/=info.mem_unit; 30#ifndef __uClinux__ 31 info.totalswap/=info.mem_unit; 32 info.freeswap/=info.mem_unit; 33#endif 34 info.sharedram/=info.mem_unit; 35 info.bufferram/=info.mem_unit; 36 } else { 37 info.mem_unit/=1024; 38 /* TODO: Make all this stuff not overflow when mem >= 4 Gib */ 39 info.totalram*=info.mem_unit; 40 info.freeram*=info.mem_unit; 41#ifndef __uClinux__ 42 info.totalswap*=info.mem_unit; 43 info.freeswap*=info.mem_unit; 44#endif 45 info.sharedram*=info.mem_unit; 46 info.bufferram*=info.mem_unit; 47 } 48 49 if (argc > 1 && *argv[1] == '-') 50 bb_show_usage(); 51 52 printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free", 53 "shared", "buffers"); 54 55 printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram, 56 info.totalram-info.freeram, info.freeram, 57 info.sharedram, info.bufferram); 58 59#ifndef __uClinux__ 60 printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap, 61 info.totalswap-info.freeswap, info.freeswap); 62 63 printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap, 64 (info.totalram-info.freeram)+(info.totalswap-info.freeswap), 65 info.freeram+info.freeswap); 66#endif 67 return EXIT_SUCCESS; 68} 69