81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
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/* free.c - a /proc implementation of free */
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/* Dec14/92 by Brian Edmonds */
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/* Thanks to Rafal Maszkowski for the Total line */
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#include "proc/sysinfo.h"
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#include "proc/version.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <getopt.h>
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#define S(X) ( ((unsigned long long)(X) << 10) >> byteshift)
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static int byteshift = 10;
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static int total = 0;
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int main(int argc, char *argv[]){
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int i;
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int old_fmt = 0;
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int rtime = 0;
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/* check startup flags */
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while( (i = getopt(argc, argv, "bkmos:tV") ) != -1 )
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switch (i) {
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case 'b': byteshift = 0; break;
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case 'k': byteshift = 10; break;
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case 'm': byteshift = 20; break;
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case 'o': old_fmt = 1; break;
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case 's': rtime = 1000000 * atof(optarg); break;
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case 't': total = 1; break;
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case 'V': display_version(); exit(0);
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default:
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fprintf(stderr, "usage: %s [-b|-k|-m] [-o] [-s delay] [-t] [-V]\n", argv[0]);
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return 1;
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}
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do {
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meminfo();
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printf(" total used free shared buffers cached\n");
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printf(
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"%-7s %10Ld %10Ld %10Ld %10Ld %10Ld %10Ld\n", "Mem:",
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S(kb_main_total),
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S(kb_main_used),
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S(kb_main_free),
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S(kb_main_shared),
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S(kb_main_buffers),
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S(kb_main_cached)
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);
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if(!old_fmt){
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printf(
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"-/+ buffers/cache: %10Ld %10Ld\n",
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S(kb_main_used-kb_main_buffers-kb_main_cached),
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S(kb_main_free+kb_main_buffers+kb_main_cached)
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);
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}
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printf(
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"%-7s %10Ld %10Ld %10Ld\n", "Swap:",
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S(kb_swap_total),
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S(kb_swap_used),
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S(kb_swap_free)
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);
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if(total == 1){
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printf(
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"%-7s %10Ld %10Ld %10Ld\n", "Total:",
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S(kb_main_total + kb_swap_total),
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S(kb_main_used + kb_swap_used),
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S(kb_main_free + kb_swap_free)
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);
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}
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if(rtime){
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fputc('\n', stdout);
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fflush(stdout);
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usleep(rtime);
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}
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} while(rtime);
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return 0;
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}
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