82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini free implementation for busybox
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*
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* Copyright (C) 1999,2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <errno.h>
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extern int free_main(int argc, char **argv)
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{
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struct sysinfo info;
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sysinfo(&info);
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/* Kernels prior to 2.4.x will return info.mem_unit==0. Kernels after
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* 2.4.x actually fill this value in */
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if (info.mem_unit==0) {
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/* Looks like we have a kernel prior to Linux 2.4.x */
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info.mem_unit=1024;
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info.totalram/=info.mem_unit;
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info.freeram/=info.mem_unit;
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info.totalswap/=info.mem_unit;
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info.freeswap/=info.mem_unit;
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info.sharedram/=info.mem_unit;
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info.bufferram/=info.mem_unit;
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} else {
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/* Bah. Linux 2.4.x completely changed sysinfo. This can in theory
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overflow a 32 bit unsigned long, but who puts more then 4GiB ram+swap
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on an embedded system? */
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info.mem_unit/=1024;
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info.totalram*=info.mem_unit;
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info.freeram*=info.mem_unit;
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info.totalswap*=info.mem_unit;
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info.freeswap*=info.mem_unit;
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info.sharedram*=info.mem_unit;
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info.bufferram*=info.mem_unit;
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}
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if (argc > 1 && **(argv + 1) == '-') {
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usage("free\n"
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#ifndef BB_FEATURE_TRIVIAL_HELP
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"\nDisplays the amount of free and used system memory\n"
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#endif
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);
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}
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printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free",
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"shared", "buffers");
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printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram,
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info.totalram-info.freeram, info.freeram,
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info.sharedram, info.bufferram);
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printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap,
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info.totalswap-info.freeswap, info.freeswap);
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printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap,
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(info.totalram-info.freeram)+(info.totalswap-info.freeswap),
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info.freeram+info.freeswap);
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return(TRUE);
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}
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