summaryrefslogtreecommitdiff
path: root/src/udev/udevadm-util.c
diff options
context:
space:
mode:
authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2014-11-25 19:39:19 -0500
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2014-11-25 21:16:47 -0500
commitd6170d27b26eeeace966bb9720d66fcac2a6ef1b (patch)
tree0610f7c4abf3e350ad56d804015778917138dd47 /src/udev/udevadm-util.c
parent6c78f43c7b0e54e695af49917fda79b584f46830 (diff)
udevadm: split out find_device helper
The idea is to unify the way that devices can be specified.
Diffstat (limited to 'src/udev/udevadm-util.c')
-rw-r--r--src/udev/udevadm-util.c49
1 files changed, 49 insertions, 0 deletions
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 <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 = 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;
+}