procps/free.c

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2002-02-02 04:17:29 +05:30
/* free.c - a /proc implementation of free */
/* Dec14/92 by Brian Edmonds */
/* Thanks to Rafal Maszkowski for the Total line */
#include "proc/sysinfo.h"
#include "proc/version.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <getopt.h>
#define S(X) ( ((unsigned long long)(X) << 10) >> byteshift)
static int byteshift = 10;
static int total = 0;
int main(int argc, char *argv[]){
int i;
int old_fmt = 0;
int rtime = 0;
/* check startup flags */
while( (i = getopt(argc, argv, "bkmos:tV") ) != -1 )
switch (i) {
case 'b': byteshift = 0; break;
case 'k': byteshift = 10; break;
case 'm': byteshift = 20; break;
case 'o': old_fmt = 1; break;
case 's': rtime = 1000000 * atof(optarg); break;
case 't': total = 1; break;
case 'V': display_version(); exit(0);
default:
fprintf(stderr, "usage: %s [-b|-k|-m] [-o] [-s delay] [-t] [-V]\n", argv[0]);
return 1;
}
do {
meminfo();
printf(" total used free shared buffers cached\n");
printf(
"%-7s %10Ld %10Ld %10Ld %10Ld %10Ld %10Ld\n", "Mem:",
S(kb_main_total),
S(kb_main_used),
S(kb_main_free),
S(kb_main_shared),
S(kb_main_buffers),
S(kb_main_cached)
);
if(!old_fmt){
printf(
"-/+ buffers/cache: %10Ld %10Ld\n",
S(kb_main_used-kb_main_buffers-kb_main_cached),
S(kb_main_free+kb_main_buffers+kb_main_cached)
);
}
printf(
"%-7s %10Ld %10Ld %10Ld\n", "Swap:",
S(kb_swap_total),
S(kb_swap_used),
S(kb_swap_free)
);
if(total == 1){
printf(
"%-7s %10Ld %10Ld %10Ld\n", "Total:",
S(kb_main_total + kb_swap_total),
S(kb_main_used + kb_swap_used),
S(kb_main_free + kb_swap_free)
);
}
if(rtime){
fputc('\n', stdout);
fflush(stdout);
usleep(rtime);
}
} while(rtime);
return 0;
}