source4/ntvfs/simple/svfs_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    simple NTVFS filesystem backend
   5
   6    Copyright (C) Andrew Tridgell 2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21 /*
  22   utility functions for simple backend
  23 */
  24
  25 #include "includes.h"
  26 #include "system/filesys.h"
  27 #include "svfs.h"
  28 #include "system/time.h"
  29 #include "system/dir.h"
  30 #include "ntvfs/ntvfs.h"
  31 #include "ntvfs/simple/proto.h"
  32
  33 /*
  34   convert a windows path to a unix path - don't do any manging or case sensitive handling
  35 */
  36 char *svfs_unix_path(struct ntvfs_module_context *ntvfs,
  37                      struct ntvfs_request *req, const char *name)
  38 {
  39         struct svfs_private *p = ntvfs->private_data;
  40         char *ret;
  41
  42         if (*name != '\\') {
  43                 ret = talloc_asprintf(req, "%s/%s", p->connectpath, name);
  44         } else {
  45                 ret = talloc_asprintf(req, "%s%s", p->connectpath, name);
  46         }
  47         all_string_sub(ret, "\\", "/", 0);
  48
  49         strlower(ret + strlen(p->connectpath));
  50
  51         return ret;
  52 }
  53
  54
  55 /*
  56   read a directory and find all matching file names and stat info
  57   returned names are separate unix and DOS names. The returned names
  58   are relative to the directory
  59 */
  60 struct svfs_dir *svfs_list_unix(TALLOC_CTX *mem_ctx, struct ntvfs_request *req, const char *unix_path)
  61 {
  62         char *p, *mask;
  63         struct svfs_dir *dir;
  64         DIR *odir;
  65         struct dirent *dent;
  66         unsigned int allocated = 0;
  67         char *low_mask;
  68
  69         dir = talloc(mem_ctx, struct svfs_dir);
  70         if (!dir) { return NULL; }
  71
  72         dir->count = 0;
  73         dir->files = 0;
  74
  75         /* find the base directory */
  76         p = strrchr(unix_path, '/');
  77         if (!p) { return NULL; }
  78
  79         dir->unix_dir = talloc_strndup(mem_ctx, unix_path, PTR_DIFF(p, unix_path));
  80         if (!dir->unix_dir) { return NULL; }
  81
  82         /* the wildcard pattern is the last part */
  83         mask = p+1;
  84
  85         low_mask = talloc_strdup(mem_ctx, mask);
  86         if (!low_mask) { return NULL; }
  87         strlower(low_mask);
  88
  89         odir = opendir(dir->unix_dir);
  90         if (!odir) { return NULL; }
  91
  92         while ((dent = readdir(odir))) {
  93                 unsigned int i = dir->count;
  94                 char *full_name;
  95                 char *low_name;
  96
  97                 if (strchr(dent->d_name, ':') && !strchr(unix_path, ':')) {
  98                         /* don't show streams in dir listing */
  99                         continue;
 100                 }
 101
 102                 low_name = talloc_strdup(mem_ctx, dent->d_name);
 103                 if (!low_name) { continue; }
 104                 strlower(low_name);
 105
 106                 /* check it matches the wildcard pattern */
 107                 if (ms_fnmatch(low_mask, low_name, PROTOCOL_NT1) != 0) {
 108                         continue;
 109                 }
 110
 111                 if (dir->count >= allocated) {
 112                         allocated = (allocated + 100) * 1.2;
 113                         dir->files = talloc_realloc(dir, dir->files, struct svfs_dirfile, allocated);
 114                         if (!dir->files) {
 115                                 closedir(odir);
 116                                 return NULL;
 117                         }
 118                 }
 119
 120                 dir->files[i].name = low_name;
 121                 if (!dir->files[i].name) { continue; }
 122
 123                 full_name = talloc_asprintf(mem_ctx, "%s/%s", dir->unix_dir,
 124                                             dir->files[i].name);
 125                 if (!full_name) { continue; }
 126
 127                 if (stat(full_name, &dir->files[i].st) == 0) {
 128                         dir->count++;
 129                 }
 130
 131                 talloc_free(full_name);
 132         }
 133
 134         closedir(odir);
 135
 136         return dir;
 137 }
 138
 139 /*
 140   read a directory and find all matching file names and stat info
 141   returned names are separate unix and DOS names. The returned names
 142   are relative to the directory
 143 */
 144 struct svfs_dir *svfs_list(struct ntvfs_module_context *ntvfs, struct ntvfs_request *req, const char *pattern)
 145 {
 146         struct svfs_private *p = ntvfs->private_data;
 147         char *unix_path;
 148
 149         unix_path = svfs_unix_path(ntvfs, req, pattern);
 150         if (!unix_path) { return NULL; }
 151
 152         return svfs_list_unix(p, req, unix_path);
 153 }
 154
 155
 156 /*******************************************************************
 157 set the time on a file via file descriptor
 158 *******************************************************************/
 159 int svfs_file_utime(int fd, struct utimbuf *times)
 160 {
 161         char *fd_path = NULL;
 162         int ret;
 163
 164         asprintf(&fd_path, "/proc/self/%d", fd);
 165         if (!fd_path) {
 166                 errno = ENOMEM;
 167                 return -1;
 168         }
 169
 170         ret = utime(fd_path, times);
 171         free(fd_path);
 172         return ret;
 173 }
 174
 175
 176 /*
 177   map a unix file attrib to a DOS attribute
 178 */
 179 uint16_t svfs_unix_to_dos_attrib(mode_t mode)
 180 {
 181         uint16_t ret = 0;
 182         if (S_ISDIR(mode)) ret |= FILE_ATTRIBUTE_DIRECTORY;
 183         if (!(mode & S_IWUSR)) ret |= FILE_ATTRIBUTE_READONLY;
 184         return ret;
 185 }
 186