/*
 *	aegis - project change supervisor
 *	Copyright (C) 1999 Peter Miller;
 *	All rights reserved.
 *
 *	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; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	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, USA.
 *
 * MANIFEST: functions to manipulate special_files
 */

#include <ac/errno.h>

#include <sys/types.h>
#include <sys/stat.h>

#include <glue.h>
#include <os.h>
#include <sub.h>


int
os_isa_special_file(path)
	string_ty	*path;
{
	struct stat	st;
	int		err;

	os_become_must_be_active();
	if (path->str_length == 0)
		return 1;
#ifdef S_IFLNK
	err = glue_lstat(path->str_text, &st);
#else
	err = glue_stat(path->str_text, &st);
#endif
	if (err < 0)
	{
		sub_context_ty  *scp;

		if (errno == ENOENT)
			return 0;
		scp = sub_context_new();
		sub_errno_set(scp);
		sub_var_set_string(scp, "File_Name", path);
		fatal_intl(scp, i18n("stat $filename: $errno"));
		/* NOTREACHED */
	}

	/*
	 * This is used by aenf.
	 * By special, in this context, I mean not a regular file.
	 */
	return !S_ISREG(st.st_mode);
}