/* * Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "udevadm-util.h" struct udev_device *find_device(struct udev *udev, const char *id, const char *prefix) { assert(udev); assert(id); if (prefix && !startswith(id, prefix)) id = strjoina(prefix, id); if (startswith(id, "/dev/")) { struct stat statbuf; char type; if (stat(id, &statbuf) < 0) return NULL; if (S_ISBLK(statbuf.st_mode)) type = 'b'; else if (S_ISCHR(statbuf.st_mode)) type = 'c'; else return NULL; return udev_device_new_from_devnum(udev, type, statbuf.st_rdev); } else if (startswith(id, "/sys/")) return udev_device_new_from_syspath(udev, id); else return NULL; }