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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 02:25:50 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 02:25:50 +0000
commit19f4f86bfed21c5326ed2acebe1163f3a83e832b (patch)
treed59b9989ce55ed23693e80974d94c856f1c2c8b1 /src/udev/udevadm-util.c
parentInitial commit. (diff)
downloadsystemd-19f4f86bfed21c5326ed2acebe1163f3a83e832b.tar.xz
systemd-19f4f86bfed21c5326ed2acebe1163f3a83e832b.zip
Adding upstream version 241.upstream/241upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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 0000000..557982b
--- /dev/null
+++ b/src/udev/udevadm-util.c
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#include <errno.h>
+
+#include "alloc-util.h"
+#include "device-private.h"
+#include "path-util.h"
+#include "udevadm-util.h"
+#include "unit-name.h"
+
+int find_device(const char *id, const char *prefix, sd_device **ret) {
+ _cleanup_free_ char *path = NULL;
+ int r;
+
+ assert(id);
+ assert(ret);
+
+ if (prefix) {
+ if (!path_startswith(id, prefix)) {
+ id = path = path_join(prefix, id);
+ if (!path)
+ return -ENOMEM;
+ }
+ } else {
+ /* In cases where the argument is generic (no prefix specified),
+ * check if the argument looks like a device unit name. */
+ if (unit_name_is_valid(id, UNIT_NAME_PLAIN) &&
+ unit_name_to_type(id) == UNIT_DEVICE) {
+ r = unit_name_to_path(id, &path);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to convert \"%s\" to a device path: %m", id);
+ id = path;
+ }
+ }
+
+ if (path_startswith(id, "/sys/"))
+ return sd_device_new_from_syspath(ret, id);
+
+ if (path_startswith(id, "/dev/")) {
+ struct stat st;
+
+ if (stat(id, &st) < 0)
+ return -errno;
+
+ return device_new_from_stat_rdev(ret, &st);
+ }
+
+ return -EINVAL;
+}