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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
commit | 19f4f86bfed21c5326ed2acebe1163f3a83e832b (patch) | |
tree | d59b9989ce55ed23693e80974d94c856f1c2c8b1 /src/udev/udevadm-util.c | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.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.c | 49 |
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; +} |