source: MondoRescue/trunk/mindi-busybox/procps/free.c@ 904

/* vi: set sw=4 ts=4: */
/*
 * Mini free implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
 */

/* getopt not needed */

#include "busybox.h"
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>

int free_main(int argc, char **argv)
{
    struct sysinfo info;
    sysinfo(&info);

    /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
    if (info.mem_unit==0) {
        info.mem_unit=1;
    }
    if ( info.mem_unit == 1 ) {
        info.mem_unit=1024;

        /* TODO:  Make all this stuff not overflow when mem >= 4 Gib */
        info.totalram/=info.mem_unit;
        info.freeram/=info.mem_unit;
#ifndef __uClinux__
        info.totalswap/=info.mem_unit;
        info.freeswap/=info.mem_unit;
#endif
        info.sharedram/=info.mem_unit;
        info.bufferram/=info.mem_unit;
    } else {
        info.mem_unit/=1024;
        /* TODO:  Make all this stuff not overflow when mem >= 4 Gib */
        info.totalram*=info.mem_unit;
        info.freeram*=info.mem_unit;
#ifndef __uClinux__
        info.totalswap*=info.mem_unit;
        info.freeswap*=info.mem_unit;
#endif
        info.sharedram*=info.mem_unit;
        info.bufferram*=info.mem_unit;
    }

    if (argc > 1 && **(argv + 1) == '-')
        bb_show_usage();

    printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free",
            "shared", "buffers");

    printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram,
            info.totalram-info.freeram, info.freeram,
            info.sharedram, info.bufferram);

#ifndef __uClinux__
    printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap,
            info.totalswap-info.freeswap, info.freeswap);

    printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap,
            (info.totalram-info.freeram)+(info.totalswap-info.freeswap),
            info.freeram+info.freeswap);
#endif
    return EXIT_SUCCESS;
}