/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
 *
 * Copyright (C) 2011,2013 Colin Walters <walters@verbum.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Author: Colin Walters <walters@verbum.org>
 */

#include "config.h"

#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <sys/mount.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/statvfs.h>

#include "ostree-mount-util.h"

int
perrorv (const char *format, ...)
{
  va_list args;
  char buf[1024];
  char *p;

#ifdef _GNU_SOURCE
  p = strerror_r (errno, buf, sizeof (buf));
#else
  strerror_r (errno, buf, sizeof (buf));
  buf[sizeof (buf) - 1] = '\0';
  p = buf;
#endif  /* _GNU_SOURCE */

  va_start (args, format);

  vfprintf (stderr, format, args);
  fprintf (stderr, ": %s\n", p);
  fflush (stderr);

  va_end (args);

  return 0;
}

int
path_is_on_readonly_fs (char *path)
{
  struct statvfs stvfsbuf;

  if (statvfs (path, &stvfsbuf) == -1)
    {
      perrorv ("statvfs(%s): ", path);
      exit (EXIT_FAILURE);
    }

  return (stvfsbuf.f_flag & ST_RDONLY) != 0;
}