src/basic/dirent-util.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2010-2012 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <fcntl.h>
  21 #include <sys/stat.h>
  22
  23 #include "dirent-util.h"
  24 #include "path-util.h"
  25 #include "string-util.h"
  26
  27 int dirent_ensure_type(DIR *d, struct dirent *de) {
  28         struct stat st;
  29
  30         assert(d);
  31         assert(de);
  32
  33         if (de->d_type != DT_UNKNOWN)
  34                 return 0;
  35
  36         if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
  37                 return -errno;
  38
  39         de->d_type =
  40                 S_ISREG(st.st_mode)  ? DT_REG  :
  41                 S_ISDIR(st.st_mode)  ? DT_DIR  :
  42                 S_ISLNK(st.st_mode)  ? DT_LNK  :
  43                 S_ISFIFO(st.st_mode) ? DT_FIFO :
  44                 S_ISSOCK(st.st_mode) ? DT_SOCK :
  45                 S_ISCHR(st.st_mode)  ? DT_CHR  :
  46                 S_ISBLK(st.st_mode)  ? DT_BLK  :
  47                                        DT_UNKNOWN;
  48
  49         return 0;
  50 }
  51
  52 bool dirent_is_file(const struct dirent *de) {
  53         assert(de);
  54
  55         if (!IN_SET(de->d_type, DT_REG, DT_LNK, DT_UNKNOWN))
  56                 return false;
  57
  58         if (hidden_or_backup_file(de->d_name))
  59                 return false;
  60
  61         return true;
  62 }
  63
  64 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) {
  65         assert(de);
  66
  67         if (!IN_SET(de->d_type, DT_REG, DT_LNK, DT_UNKNOWN))
  68                 return false;
  69
  70         if (de->d_name[0] == '.')
  71                 return false;
  72
  73         return endswith(de->d_name, suffix);
  74 }