Function excise

src/remove.c:390–433

Remove the file system object specified by ENT. IS_DIR specifies whether it is expected to be a directory or non-directory. Return RM_OK upon success, else RM_ERROR. */

   whether it is expected to be a directory or non-directory.
   Return RM_OK upon success, else RM_ERROR.  */
static enum RM_status
excise (FTS *fts, FTSENT *ent, struct rm_options const *x, bool is_dir)
{
  int flag = is_dir ? AT_REMOVEDIR : 0;
  if (unlinkat (fts->fts_cwd_fd, ent->fts_accpath, flag) == 0)
    {
      if (x->verbose)
        {
          printf ((is_dir
                   ? _("removed directory %s\n")
                   : _("removed %s\n")), quoteaf (ent->fts_path));
        }
      return RM_OK;
    }

  /* The unlinkat from kernels like linux-2.6.32 reports EROFS even for
     nonexistent files.  When the file is indeed missing, map that to ENOENT,
     so that rm -f ignores it, as required.  Even without -f, this is useful
     because it makes rm print the more precise diagnostic.  */
  if (errno == EROFS)
    {
      struct stat st;
      if ( ! (fstatat (fts->fts_cwd_fd, ent->fts_accpath, &st,
                       AT_SYMLINK_NOFOLLOW)
              && errno == ENOENT))
        errno = EROFS;
    }

  if (ignorable_missing (x, errno))
    return RM_OK;

  /* When failing to rmdir an unreadable directory, we see errno values
     like EISDIR or ENOTDIR (or, on Solaris 10, EEXIST), but they would be
     meaningless in a diagnostic.  When that happens, use the earlier, more
     descriptive errno value.  */
  if (ent->fts_info == FTS_DNR
      && (errno == ENOTEMPTY || errno == EISDIR || errno == ENOTDIR
          || errno == EEXIST)
      && ent->fts_errno != 0)
    errno = ent->fts_errno;
  error (0, errno, _("cannot remove %s"), quoteaf (ent->fts_path));
  mark_ancestor_dirs (ent);
  return RM_ERROR;
}

/* This function is called once for every file system object that fts
   encounters.  fts performs a depth-first traversal.