1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini free implementation for busybox
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4 | *
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5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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6 | *
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7 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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8 | */
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9 |
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10 | /* getopt not needed */
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11 |
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12 | #include "busybox.h"
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13 | #include <stdio.h>
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14 | #include <errno.h>
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15 | #include <stdlib.h>
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16 |
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17 | int free_main(int argc, char **argv)
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18 | {
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19 | struct sysinfo info;
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20 | sysinfo(&info);
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21 |
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22 | /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
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23 | if (info.mem_unit==0) {
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24 | info.mem_unit=1;
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25 | }
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26 | if ( info.mem_unit == 1 ) {
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27 | info.mem_unit=1024;
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28 |
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29 | /* TODO: Make all this stuff not overflow when mem >= 4 Gib */
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30 | info.totalram/=info.mem_unit;
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31 | info.freeram/=info.mem_unit;
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32 | #ifndef __uClinux__
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33 | info.totalswap/=info.mem_unit;
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34 | info.freeswap/=info.mem_unit;
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35 | #endif
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36 | info.sharedram/=info.mem_unit;
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37 | info.bufferram/=info.mem_unit;
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38 | } else {
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39 | info.mem_unit/=1024;
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40 | /* TODO: Make all this stuff not overflow when mem >= 4 Gib */
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41 | info.totalram*=info.mem_unit;
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42 | info.freeram*=info.mem_unit;
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43 | #ifndef __uClinux__
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44 | info.totalswap*=info.mem_unit;
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45 | info.freeswap*=info.mem_unit;
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46 | #endif
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47 | info.sharedram*=info.mem_unit;
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48 | info.bufferram*=info.mem_unit;
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49 | }
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50 |
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51 | if (argc > 1 && **(argv + 1) == '-')
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52 | bb_show_usage();
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53 |
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54 | printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free",
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55 | "shared", "buffers");
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56 |
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57 | printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram,
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58 | info.totalram-info.freeram, info.freeram,
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59 | info.sharedram, info.bufferram);
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60 |
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61 | #ifndef __uClinux__
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62 | printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap,
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63 | info.totalswap-info.freeswap, info.freeswap);
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64 |
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65 | printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap,
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66 | (info.totalram-info.freeram)+(info.totalswap-info.freeswap),
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67 | info.freeram+info.freeswap);
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68 | #endif
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69 | return EXIT_SUCCESS;
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70 | }
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71 |
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