usr.sbin/mtree/excludes.c

   1 /*      $NetBSD: excludes.c,v 1.13 2004/06/20 22:20:18 jmc Exp $        */
   2
   3 /*
   4  * Copyright 2000 Massachusetts Institute of Technology
   5  *
   6  * Permission to use, copy, modify, and distribute this software and
   7  * its documentation for any purpose and without fee is hereby
   8  * granted, provided that both the above copyright notice and this
   9  * permission notice appear in all copies, that both the above
  10  * copyright notice and this permission notice appear in all
  11  * supporting documentation, and that the name of M.I.T. not be used
  12  * in advertising or publicity pertaining to distribution of the
  13  * software without specific, written prior permission.  M.I.T. makes
  14  * no representations about the suitability of this software for any
  15  * purpose.  It is provided "as is" without express or implied
  16  * warranty.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
  19  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
  20  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
  22  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  25  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  28  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #if HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37
  38 #if defined(__RCSID) && !defined(lint)
  39 __RCSID("$NetBSD: excludes.c,v 1.13 2004/06/20 22:20:18 jmc Exp $");
  40 #endif
  41
  42 #include <sys/types.h>
  43 #include <sys/queue.h>
  44
  45 #include <fnmatch.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <time.h>
  50 #include <util.h>
  51
  52 #include "extern.h"
  53
  54
  55 /*
  56  * We're assuming that there won't be a whole lot of excludes,
  57  * so it's OK to use a stupid algorithm.
  58  */
  59 struct exclude {
  60         LIST_ENTRY(exclude) link;
  61         const char *glob;
  62         int pathname;
  63 };
  64 static LIST_HEAD(, exclude) excludes;
  65
  66
  67 void
  68 init_excludes(void)
  69 {
  70
  71         LIST_INIT(&excludes);
  72 }
  73
  74 void
  75 read_excludes_file(const char *name)
  76 {
  77         FILE *fp;
  78         char *line;
  79         struct exclude *e;
  80
  81         fp = fopen(name, "r");
  82         if (fp == 0)
  83                 err(1, "%s", name);
  84
  85         while ((line = fparseln(fp, NULL, NULL, NULL,
  86             FPARSELN_UNESCCOMM | FPARSELN_UNESCCONT | FPARSELN_UNESCESC))
  87             != NULL) {
  88                 if (line[0] == '\0')
  89                         continue;
  90
  91                 if ((e = malloc(sizeof *e)) == NULL)
  92                         mtree_err("memory allocation error");
  93
  94                 e->glob = line;
  95                 if (strchr(e->glob, '/') != NULL)
  96                         e->pathname = 1;
  97                 else
  98                         e->pathname = 0;
  99                 LIST_INSERT_HEAD(&excludes, e, link);
 100         }
 101         fclose(fp);
 102 }
 103
 104 int
 105 check_excludes(const char *fname, const char *path)
 106 {
 107         struct exclude *e;
 108
 109         /* fnmatch(3) has a funny return value convention... */
 110 #define MATCH(g, n) (fnmatch((g), (n), FNM_PATHNAME) == 0)
 111
 112         e = LIST_FIRST(&excludes);
 113         while (e) {
 114                 if ((e->pathname && MATCH(e->glob, path))
 115                     || MATCH(e->glob, fname)) {
 116                         return (1);
 117                 }
 118                 e = LIST_NEXT(e, link);
 119         }
 120         return (0);
 121 }