メモリ情報を調べる

Makefile

# Makefile
sysinfo: sysinfo.c
	g++ -o sysinfo sysinfo.c
clean:
	rm -f sysinfo

sysinfo.c

// sysinfo.c
// メモリ情報を調べる
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/sysinfo.h>

int main(int argc, char *argv[])
{
	int ret = 0;
	struct sysinfo info = {0};
	
	ret = sysinfo(&info);
	if (ret != 0) {
		printf("Error: sysinfo() %s\n", strerror(errno));
		exit(EXIT_FAILURE);
	}
	
	printf("uptime: %ld\n", info.uptime);
	printf("1 minute load averages: %lu\n", info.loads[0]);
	printf("5 minute load averages: %lu\n", info.loads[1]);
	printf("15 minute load averages: %lu\n", info.loads[2]);
	printf("totalram: %lu\n", info.totalram);
	printf("freeram: %lu\n", info.freeram);
	printf("sharedram: %lu\n", info.sharedram);
	printf("bufferram: %lu\n", info.bufferram);
	printf("totalswap: %lu\n", info.totalswap);
	printf("freeswap: %lu\n", info.freeswap);
	printf("procs: %d\n", info.procs);
	printf("totalhigh: %lu\n", info.totalhigh);
	printf("freehigh: %lu\n", info.freehigh);
	printf("mem_unit: %d\n", info.mem_unit);

	exit(EXIT_SUCCESS);
}