lib/util/tftw.c

   1 /*
   2  * Copyright (c) 2008-2018 by Andreas Schneider <asn@samba.org>
   3  *
   4  * Adopted from the csync source code
   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 #include "replace.h"
  21 #include <errno.h>
  22 #include <sys/types.h>
  23 #include <dirent.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <stdlib.h>
  27 #include <sys/stat.h>
  28 #include "memory.h"
  29 #include "debug.h"
  30 #include "replace.h"
  31 #include "system/locale.h"
  32 #include "lib/util/asn1.h"
  33 #include "lib/util/debug.h"
  34 #include "lib/util/samba_util.h"
  35
  36 #include "tftw.h"
  37
  38
  39 int tftw(TALLOC_CTX *mem_ctx, const char *fpath, tftw_walker_fn fn, size_t depth, void *userdata)
  40 {
  41         char *filename = NULL;
  42         char *d_name = NULL;
  43         DIR *dh = NULL;
  44         struct dirent *dirent = NULL;
  45         struct stat sb = {0};
  46         int rc = 0;
  47
  48         if (fpath[0] == '\0') {
  49                 errno = ENOENT;
  50                 goto error;
  51         }
  52
  53         if ((dh = opendir(fpath)) == NULL) {
  54                 /* permission denied */
  55                 if (errno == EACCES) {
  56                         return 0;
  57                 } else {
  58                         DBG_ERR("opendir failed for: [%s]\n", strerror(errno));
  59                         goto error;
  60                 }
  61         }
  62
  63         while ((dirent = readdir(dh))) {
  64                 int flag;
  65
  66                 d_name = dirent->d_name;
  67                 if (d_name == NULL) {
  68                         goto error;
  69                 }
  70
  71                 /* skip "." and ".." */
  72                 if (d_name[0] == '.' && (d_name[1] == '\0'
  73                                         || (d_name[1] == '.' && d_name[2] == '\0'))) {
  74                         dirent = NULL;
  75                         continue;
  76                 }
  77
  78                 filename = talloc_asprintf(mem_ctx, "%s/%s", fpath, d_name);
  79                 if (filename == NULL) {
  80                         goto error;
  81                 }
  82
  83                 rc = lstat(filename, &sb);
  84                 if (rc < 0) {
  85                         dirent = NULL;
  86                         goto error;
  87                 }
  88
  89                 switch (sb.st_mode & S_IFMT) {
  90                         case S_IFLNK:
  91                                 flag = TFTW_FLAG_SLINK;
  92                                 break;
  93                         case S_IFDIR:
  94                                 flag = TFTW_FLAG_DIR;
  95                                 break;
  96                         case S_IFBLK:
  97                         case S_IFCHR:
  98                         case S_IFSOCK:
  99                         case S_IFIFO:
 100                                 flag = TFTW_FLAG_SPEC;
 101                                 break;
 102                         default:
 103                                 flag = TFTW_FLAG_FILE;
 104                                 break;
 105                 }
 106
 107                 DBG_INFO("walk: [%s]\n", filename);
 108
 109                 /* Call walker function for each file */
 110                 rc = fn(mem_ctx, filename, &sb, flag, userdata);
 111
 112                 if (rc < 0) {
 113                         DBG_ERR("provided callback fn() failed: [%s]\n",
 114                                 strerror(errno));
 115                         closedir(dh);
 116                         goto done;
 117                 }
 118
 119                 if (flag == TFTW_FLAG_DIR && depth) {
 120                         rc = tftw(mem_ctx, filename, fn, depth - 1, userdata);
 121                         if (rc < 0) {
 122                                 closedir(dh);
 123                                 goto done;
 124                         }
 125                 }
 126                 TALLOC_FREE(filename);
 127                 dirent = NULL;
 128         }
 129         closedir(dh);
 130
 131 done:
 132         TALLOC_FREE(filename);
 133         return rc;
 134 error:
 135         if (dh != NULL) {
 136                 closedir(dh);
 137         }
 138         TALLOC_FREE(filename);
 139         return -1;
 140 }