Run acquire_root_devno() on the varlink-provided node so symlinks (e.g. /dev/disk/by-id/...) resolve to their canonical /dev/ path before being used. Without this, sym_fdisk_partname() produces a "-partN" symlink that udev hasn't created yet when repart calls open() on it right after BLKPG_ADD_PARTITION, failing with ENOENT. This also brings the varlink path in line with the CLI path's partition-to-whole-disk and dm-crypt-to-backing resolution.
System and Service Manager
Details
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