/*
 * Copyright (c) 2014 Kungliga Tekniska Högskolan
 * (KTH Royal Institute of Technology, Stockholm, Sweden).
 */

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>

#include <sys/time.h>
#include <sys/select.h>

#include "erlport.h"

static int
dosync(int fd)
{
#ifdef F_FULLFSYNC
    int ret = fcntl(fd, F_FULLFSYNC);
#else
    int ret = fsync(fd);
#endif
    return ret;
}

int
main()
{
    char buf[100];
    ssize_t len;

    /* XXX: exits when command size is 0 */

    while ((len = read_command(buf, sizeof(buf)-1)) > 0) {
        buf[len] = '\0';
        while (1) {
            int fd;

            fd = open(buf, O_RDONLY);
            if (fd == -1) {
                /* XXX: better errors */
                write_status("openerror");
                break;
            }

            if (dosync(fd) == 0) {
                write_status("ok");
            } else if (errno == EBADF) {
                write_status("ebadf");
            } else if (errno == EINTR) {
                close(fd);
                continue;
            } else {
                write_status("fsyncerror");
            }

            close(fd);
            break;
        }
    }

    return 0;
}