From d6170d27b26eeeace966bb9720d66fcac2a6ef1b Mon Sep 17 00:00:00 2001 From: Zbigniew Jędrzejewski-Szmek Date: Tue, 25 Nov 2014 19:39:19 -0500 Subject: udevadm: split out find_device helper The idea is to unify the way that devices can be specified. --- src/udev/udevadm-util.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/udev/udevadm-util.c (limited to 'src/udev/udevadm-util.c') diff --git a/src/udev/udevadm-util.c b/src/udev/udevadm-util.c new file mode 100644 index 0000000000..37e80c31df --- /dev/null +++ b/src/udev/udevadm-util.c @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2008-2009 Kay Sievers + * + * 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 . + */ + +#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 = strappenda(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; +} -- cgit v1.2.3-54-g00ecf