79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/*
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* Copyright (c) 2011 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* memstat.c
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* Prints system memory usage information.
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*/
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#include <err.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#define BYTES 0
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#define KIBI 1
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#define MEBI 2
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#define GIBI 3
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#define TEBI 4
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#define PEBI 5
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#define EXBI 6
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void printbytes(unsigned long long bytes)
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{
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unsigned unit = BYTES;
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if ( (bytes >> 10ULL) & 1023ULL ) { unit = KIBI; }
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if ( (bytes >> 20ULL) & 1023ULL ) { unit = MEBI; }
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if ( (bytes >> 30ULL) & 1023ULL ) { unit = GIBI; }
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if ( (bytes >> 40ULL) & 1023ULL ) { unit = TEBI; }
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if ( (bytes >> 50ULL) & 1023ULL ) { unit = PEBI; }
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if ( (bytes >> 60ULL) & 1023ULL ) { unit = EXBI; }
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switch ( unit )
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{
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case EXBI:
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printf("%llu ZiB ", (bytes >> 60ULL) & 1023ULL);
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case PEBI:
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printf("%llu PiB ", (bytes >> 50ULL) & 1023ULL);
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case TEBI:
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printf("%llu TiB ", (bytes >> 40ULL) & 1023ULL);
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case GIBI:
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printf("%llu GiB ", (bytes >> 30ULL) & 1023ULL);
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case MEBI:
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printf("%llu MiB ", (bytes >> 20ULL) & 1023ULL);
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case KIBI:
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printf("%llu KiB", (bytes >> 10ULL) & 1023ULL);
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break;
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case BYTES:
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printf("%llu B", (bytes >> 0ULL) & 1023ULL);
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}
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}
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int main(void)
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{
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size_t memused = 0;
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size_t memtotal = 0;
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if ( memstat(&memused, &memtotal) )
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err(1, "memstat");
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printf("memory usage: ");
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printbytes(memused);
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printf(" used / ");
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printbytes(memtotal);
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unsigned percent = ((unsigned long long) memused * 100ULL ) / memtotal;
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printf(" total (%u%s)\n", percent, "%");
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return 0;
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}
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