src/basic/dirent-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2010-2012 Lennart Poettering
   6 ***/
   7
   8 #include <fcntl.h>
   9 #include <sys/stat.h>
  10
  11 #include "dirent-util.h"
  12 #include "path-util.h"
  13 #include "string-util.h"
  14
  15 int dirent_ensure_type(DIR *d, struct dirent *de) {
  16         struct stat st;
  17
  18         assert(d);
  19         assert(de);
  20
  21         if (de->d_type != DT_UNKNOWN)
  22                 return 0;
  23
  24         if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
  25                 return -errno;
  26
  27         de->d_type =
  28                 S_ISREG(st.st_mode)  ? DT_REG  :
  29                 S_ISDIR(st.st_mode)  ? DT_DIR  :
  30                 S_ISLNK(st.st_mode)  ? DT_LNK  :
  31                 S_ISFIFO(st.st_mode) ? DT_FIFO :
  32                 S_ISSOCK(st.st_mode) ? DT_SOCK :
  33                 S_ISCHR(st.st_mode)  ? DT_CHR  :
  34                 S_ISBLK(st.st_mode)  ? DT_BLK  :
  35                                        DT_UNKNOWN;
  36
  37         return 0;
  38 }
  39
  40 bool dirent_is_file(const struct dirent *de) {
  41         assert(de);
  42
  43         if (!IN_SET(de->d_type, DT_REG, DT_LNK, DT_UNKNOWN))
  44                 return false;
  45
  46         if (hidden_or_backup_file(de->d_name))
  47                 return false;
  48
  49         return true;
  50 }
  51
  52 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) {
  53         assert(de);
  54
  55         if (!IN_SET(de->d_type, DT_REG, DT_LNK, DT_UNKNOWN))
  56                 return false;
  57
  58         if (de->d_name[0] == '.')
  59                 return false;
  60
  61         if (!suffix)
  62                 return true;
  63
  64         return endswith(de->d_name, suffix);
  65 }
  66
  67 struct dirent* readdir_no_dot(DIR *dirp) {
  68         struct dirent* d;
  69
  70         for (;;) {
  71                 d = readdir(dirp);
  72                 if (d && dot_or_dot_dot(d->d_name))
  73                         continue;
  74                 return d;
  75         }
  76 }