src/networkd/util.c

   1 /*#############################################################################
   2 #                                                                             #
   3 # IPFire.org - A linux based firewall                                         #
   4 # Copyright (C) 2023 IPFire Network Development Team                          #
   5 #                                                                             #
   6 # This program is free software: you can redistribute it and/or modify        #
   7 # it under the terms of the GNU General Public License as published by        #
   8 # the Free Software Foundation, either version 3 of the License, or           #
   9 # (at your option) any later version.                                         #
  10 #                                                                             #
  11 # This program is distributed in the hope that it will be useful,             #
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  14 # GNU General Public License for more details.                                #
  15 #                                                                             #
  16 # You should have received a copy of the GNU General Public License           #
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  18 #                                                                             #
  19 #############################################################################*/
  20
  21 #include <errno.h>
  22 #include <fnmatch.h>
  23 #include <ftw.h>
  24 #include <stddef.h>
  25 #include <stdio.h>
  26
  27 #include "util.h"
  28
  29 int nw_ftw(const char* path, const char* filter,
  30                 int (*callback)(const char* path, const struct stat* s, void* data), void* data) {
  31         /*
  32                 This is a nested function which allows us to pass some custom pointer to
  33                 the callback function as that isn't possible with nftw().
  34         */
  35         int __callback(const char* p, const struct stat* s, int type, struct FTW* ftw) {
  36                 int r;
  37
  38                 // Filter out anything we don't want
  39                 if (filter) {
  40                         r = fnmatch(filter, p, FNM_PATHNAME);
  41
  42                         switch (r) {
  43                                 // Pattern didn't match
  44                                 case FNM_NOMATCH:
  45                                         return 0;
  46
  47                                 // Pattern matched
  48                                 case 0:
  49                                         break;
  50
  51                                 // Error
  52                                 default:
  53                                         return 1;
  54                         }
  55                 }
  56
  57                 return callback(p, s, data);
  58         }
  59
  60         return nftw(path, __callback, 0, 0);
  61 }