/*      $NetBSD: excludes.c,v 1.13 2004/06/20 22:20:18 jmc Exp $        */

/*
* Copyright 2000 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.  M.I.T. makes
* no representations about the suitability of this software for any
* purpose.  It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>

#if defined(__RCSID) && !defined(lint)
__RCSID("$NetBSD: excludes.c,v 1.13 2004/06/20 22:20:18 jmc Exp $");
#endif

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

#include <fnmatch.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <util.h>

#include "extern.h"


/*
* We're assuming that there won't be a whole lot of excludes,
* so it's OK to use a stupid algorithm.
*/
struct exclude {
       LIST_ENTRY(exclude) link;
       const char *glob;
       int pathname;
};
static LIST_HEAD(, exclude) excludes;


void
init_excludes(void)
{

       LIST_INIT(&excludes);
}

void
read_excludes_file(const char *name)
{
       FILE *fp;
       char *line;
       struct exclude *e;

       fp = fopen(name, "r");
       if (fp == 0)
               err(1, "%s", name);

       while ((line = fparseln(fp, NULL, NULL, NULL,
           FPARSELN_UNESCCOMM | FPARSELN_UNESCCONT | FPARSELN_UNESCESC))
           != NULL) {
               if (line[0] == '\0')
                       continue;

               if ((e = malloc(sizeof *e)) == NULL)
                       mtree_err("memory allocation error");

               e->glob = line;
               if (strchr(e->glob, '/') != NULL)
                       e->pathname = 1;
               else
                       e->pathname = 0;
               LIST_INSERT_HEAD(&excludes, e, link);
       }
       fclose(fp);
}

int
check_excludes(const char *fname, const char *path)
{
       struct exclude *e;

       /* fnmatch(3) has a funny return value convention... */
#define MATCH(g, n) (fnmatch((g), (n), FNM_PATHNAME) == 0)

       e = LIST_FIRST(&excludes);
       while (e) {
               if ((e->pathname && MATCH(e->glob, path))
                   || MATCH(e->glob, fname)) {
                       return (1);
               }
               e = LIST_NEXT(e, link);
       }
       return (0);
}