71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <sys/sysinfo.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: %s [-bkmg]\n", argv0);
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}
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static unsigned int mem_unit = 1;
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static unsigned int unit_shift;
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static unsigned long long
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scale(unsigned long long v)
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{
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return (v * mem_unit) >> unit_shift;
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}
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int
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main(int argc, char *argv[])
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{
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struct sysinfo info;
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if (sysinfo(&info) < 0)
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eprintf("sysinfo:");
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mem_unit = info.mem_unit ? info.mem_unit : 1;
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ARGBEGIN {
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case 'b':
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unit_shift = 0;
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break;
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case 'k':
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unit_shift = 10;
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break;
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case 'm':
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unit_shift = 20;
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break;
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case 'g':
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unit_shift = 30;
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break;
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default:
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usage();
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} ARGEND;
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printf(" %13s%13s%13s%13s%13s\n",
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"total",
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"used",
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"free",
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"shared", "buffers");
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printf("Mem: ");
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printf("%13llu%13llu%13llu%13llu%13llu\n",
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scale(info.totalram),
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scale(info.totalram - info.freeram),
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scale(info.freeram),
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scale(info.sharedram),
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scale(info.bufferram));
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printf("-/+ buffers/cache:");
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printf("%13llu%13llu\n",
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scale(info.totalram - info.freeram - info.bufferram),
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scale(info.freeram + info.bufferram));
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printf("Swap:");
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printf("%13llu%13llu%13llu\n",
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scale(info.totalswap),
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scale(info.totalswap - info.freeswap),
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scale(info.freeswap));
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return EXIT_SUCCESS;
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}
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