// $Id: chxid.c 2473 2007-01-25 09:51:43Z dhozac $    --*- c -*--

// Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
//  
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//  
// This program 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 General Public License for more details.
//  
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.


#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include "fstool.h"
#include "util.h"

#include "lib/vserver.h"

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

struct option const
CMDLINE_OPTIONS[] = {
  { "help",     no_argument,  0, CMD_HELP },
  { "version",  no_argument,  0, CMD_VERSION },
  { 0,0,0,0 }
};

char const		CMDLINE_OPTIONS_SHORT[] = "Rc:xU";

void
showHelp(int fd, char const *cmd, int res)
{
  WRITE_MSG(fd, "Usage:  ");
  WRITE_STR(fd, cmd);
  WRITE_MSG(fd,
	    " -c <ctx|vserver> [-RxU] [--] <file>+\n\n"
	    " Options:\n"
	    "   -R  ...  recurse through directories\n"
	    "   -c  ...  assign the given context/vserver to the file(s)\n"
	    "   -x  ...  do not cross filesystems\n"
	    "   -U  ...  skip unified files\n\n"
	    "Please report bugs to " PACKAGE_BUGREPORT "\n");
  exit(res);
}

void
showVersion()
{
  WRITE_MSG(1,
	    "chxid " VERSION " -- assigns a context to a file\n"
	    "This program is part of " PACKAGE_STRING "\n\n"
	    "Copyright (C) 2004 Enrico Scholz\n"
	    VERSION_COPYRIGHT_DISCLAIMER);
  exit(0);
}

static inline bool
isUnified(char const *filename)
{
  uint_least32_t const	V = VC_IATTR_IUNLINK|VC_IATTR_IMMUTABLE;

  uint_least32_t	flags;
  uint_least32_t	mask = V;

  if (vc_get_iattr(filename, 0, &flags, &mask)==-1 || (mask & V) != V)
    return false;

  return (flags & V)==V  ? true : false;
}

bool
handleFile(char const *name, char const * display_name)
{
  if (!global_args->no_unified || !isUnified(name)) {
    int	rc = vc_set_iattr(name, global_args->ctx, 0, VC_IATTR_XID);
  
    if (rc==-1) {
      perror(display_name);
      return false;
    }
  }

  return true;
}

void
fixupParams(struct Arguments UNUSED *args, int argc)
{
  if (optind==argc) {
    WRITE_MSG(2, "No filename given; use '--help' for more information\n");
    exit(1);
  }

  if (args->ctx_str==0) {
    WRITE_MSG(2, "No context given; use '--help' for more information\n");
    exit(1);
  }

  args->ctx            = vc_xidopt2xid(args->ctx_str, true, 0);
  args->do_display_dir = !args->do_recurse;
  args->do_display_dot = true;
}