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add 2 new unit tests for recv/send file feature

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <aitio.h>


int
main(int argc, char **argv)
{
	int s, c, sl;
	struct sockaddr sa;
	struct sockaddr_in sin;

	if (argc < 3)
		return 1;

	sa.sa_len = sl = sizeof sa;
	sin.sin_len = sizeof sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(5000);
	sin.sin_addr.s_addr = inet_addr("127.0.0.1");

	s = socket(AF_INET, SOCK_STREAM, 0);
	if (s == -1) {
		perror("socket");
		return 2;
	}
	if (bind(s, (struct sockaddr*) &sin, sizeof sin) == -1) {
		perror("bind");
		close(s);
		return 3;
	}
	if (listen(s, 5) == -1) {
		perror("listen");
		close(s);
		return 4;
	}

	if ((c = accept(s, &sa, &sl)) != -1) {
		sl = ioRecvFile(c, argv[1], strtol(argv[2], NULL, 0), 0644, argv[3] ? strtol(argv[3], NULL, 0) : 0);
		printf("received %d bytes\n", sl);
		if (!sl)
			printf("#%d - %s\n", io_GetErrno(), io_GetError());
		close(c);
	}

	close(s);
	return 0;
}