procps/free.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini free implementation for busybox
   4  *
   5  * Copyright (C) 1999,2000 by Lineo, inc.
   6  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  *
  22  */
  23
  24 #include "internal.h"
  25 #include <stdio.h>
  26 #include <sys/sysinfo.h>
  27
  28 #define DIVISOR 1024
  29 extern int free_main(int argc, char **argv)
  30 {
  31         struct sysinfo info;
  32         sysinfo(&info);
  33         info.totalram/=DIVISOR;
  34         info.freeram/=DIVISOR;
  35         info.totalswap/=DIVISOR;
  36         info.freeswap/=DIVISOR;
  37         info.sharedram/=DIVISOR;
  38         info.bufferram/=DIVISOR;
  39
  40         if (argc > 1 && **(argv + 1) == '-') {
  41                 usage("free\n"
  42 #ifndef BB_FEATURE_TRIVIAL_HELP
  43                                 "\nDisplays the amount of free and used system memory\n"
  44 #endif
  45                                 );
  46         }
  47
  48
  49         printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free",
  50                         "shared", "buffers");
  51
  52         printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram,
  53                         info.totalram-info.freeram, info.freeram,
  54                         info.sharedram, info.bufferram);
  55
  56         printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap,
  57                         info.totalswap-info.freeswap, info.freeswap);
  58
  59         printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap,
  60                         (info.totalram-info.freeram)+(info.totalswap-info.freeswap),
  61                         info.freeram+info.freeswap);
  62         exit(TRUE);
  63 }