1/* 2 * Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org> 3 * 4 * This program is free software: you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation, either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. If not, see <http://www.gnu.org/licenses/>. 16 */ 17 18#include "udevadm-util.h" 19 20struct udev_device *find_device(struct udev *udev, 21 const char *id, 22 const char *prefix) { 23 24 assert(udev); 25 assert(id); 26 27 if (prefix && !startswith(id, prefix)) 28 id = strjoina(prefix, id); 29 30 if (startswith(id, "/dev/")) { 31 struct stat statbuf; 32 char type; 33 34 if (stat(id, &statbuf) < 0) 35 return NULL; 36 37 if (S_ISBLK(statbuf.st_mode)) 38 type = 'b'; 39 else if (S_ISCHR(statbuf.st_mode)) 40 type = 'c'; 41 else 42 return NULL; 43 44 return udev_device_new_from_devnum(udev, type, statbuf.st_rdev); 45 } else if (startswith(id, "/sys/")) 46 return udev_device_new_from_syspath(udev, id); 47 else 48 return NULL; 49} 50