// gcc -Os -Wall -o statuscat statuscat.c

#include <unistd.h>
#include <signal.h>
#include <stdio.h>
#include <time.h>

int main()
{
	int buflen = getpagesize();
	int rc, chunklen, idx;
	unsigned char buffer[buflen];
	long long old_total = 0, total = 0;
	time_t time_start = time(NULL) - 1;
	int retval = 0;

	signal(SIGPIPE, SIG_IGN);

	while (1) {
		rc = read(0, buffer, buflen);
		if (rc < 0) {
			sleep(2);
			perror("COPY: read error");
			goto error;
		}
		if (rc == 0)
			break;
		for (idx = 0, chunklen = rc; idx < chunklen; idx += rc)
		{
			rc = write(1, buffer+idx, chunklen-idx);
			if (rc <= 0) {
				sleep(2);
				perror("COPY: write error");
				goto error;
			}
		}
		total += chunklen;
		if (total - old_total >= 1024*1024*64) {
			time_t time_now = time(NULL);
			fprintf(stderr, "COPY: %Ld MB (%Ld MB/sec)\r", total / (1024*1024), (total / (1024*1024)) / (time_now-time_start));
			old_total = total;
		}
	}

	if (0) {
error:
		retval = 1;
	}

	time_t time_now = time(NULL);
	fprintf(stderr, "COPY: %Ld MB (%Ld MB/sec)\n", total / (1024*1024), (total / (1024*1024)) / (time_now-time_start));

	return retval;
}