#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <unistd.h>

const char sockpath[] = "/tmp/sockperm_test";

int
main(int argc, char **argv)
{
    int server_fd, client_fd;
    struct sockaddr_un addr;

    memset(&addr, 0, sizeof(addr));
    addr.sun_family = AF_UNIX;
    strcpy(addr.sun_path, sockpath);

    server_fd = socket(AF_UNIX, SOCK_STREAM, 0);
    if (server_fd < 0)
    {
	perror("socket");
	return 1;
    }
    if (bind(server_fd, (struct sockaddr *) &addr, sizeof(addr)) != 0)
    {
	perror("bind");
	return 1;
    }
    if (chmod(sockpath, 0) != 0)
    {
	perror("chmod");
	return 1;
    }
    if (listen(server_fd, 0) != 0)
    {
	perror("listen");
	return 1;
    }

    client_fd = socket(AF_UNIX, SOCK_STREAM, 0);
    if (client_fd < 0)
    {
	perror("socket");
	return 1;
    }
    if (connect(client_fd, (struct sockaddr *) &addr, sizeof(addr)) == 0)
	puts("connect: unexpected non-failure");
    else if (errno == EACCES)
	puts("connect: normal behavior (EACCES)");
    else
	perror("connect: unexpected failure");

    if (unlink(sockpath) != 0)
    {
	perror("unlink");
	return 1;
    }

    return 0;
}