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#include "memory.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
long long int run_mem_command(const char *command) {
char buf[128];
long long int res = 0;
FILE *p = popen(command, "r");
if (!p) {
fprintf(stderr, "ホストコマンドを実効に失敗: %s", command);
return 0;
}
while (fgets(buf, sizeof(buf), p) != NULL) {
buf[strcspn(buf, "\n")] = '\0';
}
res = atoll(buf);
pclose(p);
return res;
}
void display_memory() {
long long int memused = 0;
long long int memtotal = 0;
#if defined(__OpenBSD__)
memused = run_mem_command("vmstat | awk 'END {printf $3}' | sed 's/M//'");
memtotal = run_mem_command("sysctl -n hw.physmem") / 1024LL / 1024LL;
#elif defined(__FreeBSD__) || defined(__DragonFly__)
// 13M Active, 200M Inact, 184M Laundry,
long long int used1 = run_mem_command("top | grep \"Mem:\" | awk '{print $2}' | "
"sed 's/M//'");
long long int used2 = run_mem_command("top | grep \"Mem:\" | awk '{print $4}' | "
"sed 's/M//'");
long long int used3 = run_mem_command("top | grep \"Mem:\" | awk '{print $6}' | "
"sed 's/M//'");
long long int used4 = run_mem_command("top | grep \"ARC:\" | awk '{print $6}' | "
"sed 's/M//'");
memused = used1 + used2 + used3 + used4;
memtotal = run_mem_command("sysctl -n hw.physmem") / 1024LL / 1024LL;
#elif defined(__NetBSD__)
memused = run_mem_command("top | grep \"Memory:\" | awk '{print $2}' | "
"sed 's/M//'");
memtotal = run_mem_command("sysctl -n hw.physmem64") / 1024LL / 1024LL;
#elif defined(__minix)
memtotal = run_mem_command("sysctl -n hw.physmem") / 1024LL / 1024LL;
#elif defined(__linux__)
long long int memaval = run_mem_command("cat /proc/meminfo | grep MemAvailable | "
"awk '{print $2}'") / 1024LL;
memtotal = run_mem_command("cat /proc/meminfo | grep MemTotal | "
"awk '{print $2}'") / 1024LL;
memused = memtotal - memaval;
/* memused = run_mem_command("cat /proc/meminfo | grep MemFree | "
"awk '{print $2}'") / 1024LL; */
#endif
printf("%lld MiB / %lld MiB", memused, memtotal);
}
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