}
+/**
+ * @brief Determine if a file descriptor has a default ACL.
+ *
+ * @param fd
+ * The file descriptor whose default ACL is in question.
+ *
+ * @return
+ * - @c ACL_SUCCESS - If @c fd has a default ACL.
+ * - @c ACL_FAILURE - If @c fd does not have a default ACL.
+ * - @c ACL_ERROR - Unexpected library error.
+ */
+int has_default_acl_fd(int fd) {
+ if (fgetxattr(fd, XATTR_NAME_POSIX_ACL_DEFAULT, NULL, 0) == XATTR_ERROR) {
+ if (errno == ENODATA) {
+ return ACL_FAILURE;
+ }
+ perror("has_default_acl_fd (fgetxattr)");
+ return ACL_ERROR;
+ }
+
+ return ACL_SUCCESS;
+}
+
+
/**
* @brief Apply parent default ACL to a path.
*
}
}
+ /* Check to make sure the parent descriptor actually has a default
+ ACL. If it doesn't, then we can "succeed" immediately. */
+ if (has_default_acl_fd(parent_fd) == ACL_FAILURE) {
+ result = ACL_SUCCESS;
+ goto cleanup;
+ }
+
fd = safe_open(path, O_NOFOLLOW);
if (fd == OPEN_ERROR) {
if (errno == ELOOP || errno == ENOTDIR) {
if (new_acl_unmasked != (acl_t)NULL) {
acl_free(new_acl_unmasked);
}
- if (fd >= 0 && close(fd) == CLOSE_ERROR) {
+ if (fd > 0 && close(fd) == CLOSE_ERROR) {
perror("apply_default_acl_ex (close fd)");
result = ACL_ERROR;
}
- if (parent_fd >= 0 && close(parent_fd) == CLOSE_ERROR) {
+ if (parent_fd > 0 && close(parent_fd) == CLOSE_ERROR) {
perror("apply_default_acl_ex (close parent_fd)");
result = ACL_ERROR;
}