src/basic/device-nodes.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2012 Lennart Poettering
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <stddef.h>
  24 #include <sys/types.h>
  25
  26 #include "macro.h"
  27 #include "stdio-util.h"
  28
  29 int encode_devnode_name(const char *str, char *str_enc, size_t len);
  30 int whitelisted_char_for_devnode(char c, const char *additional);
  31
  32 #define SYS_BLOCK_PATH_MAX(suffix)                                      \
  33         (strlen("/sys/dev/block/") + DECIMAL_STR_MAX(dev_t) + 1 + DECIMAL_STR_MAX(dev_t) + strlen_ptr(suffix))
  34 #define xsprintf_sys_block_path(buf, suffix, devno)                     \
  35         xsprintf(buf, "/sys/dev/block/%u:%u%s", major(devno), minor(devno), strempty(suffix))
  36
  37 #define DEV_NUM_PATH_MAX                                                \
  38         (strlen("/dev/block/") + DECIMAL_STR_MAX(dev_t) + 1 + DECIMAL_STR_MAX(dev_t))
  39 #define xsprintf_dev_num_path(buf, type, devno)                         \
  40         xsprintf(buf, "/dev/%s/%u:%u", type, major(devno), minor(devno))