busybox-w32/util-linux/volume_id, branch master

*: whitespace cleanup

2026-02-08T07:31:13+00:00

Signed-off-by: Denys Vlasenko

*: use is_prefixed_with() where appropriate

2026-02-07T00:10:55+00:00

function old new delta resume_main 560 556 -4 uuidcache_check_device 107 101 -6 ntp_init 1005 997 -8 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-18) Total: -18 bytes Signed-off-by: Denys Vlasenko

volume_id: improve handling of too-small (usually zero-byte or erroring) blockdevs

2026-02-04T14:59:33+00:00

function old new delta volume_id_get_buffer 327 372 +45 volume_id_open_node 17 24 +7 volume_id_probe_all 133 123 -10 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 52/-10) Total: 42 bytes Signed-off-by: Denys Vlasenko

volume_id: volume_id_get_buffer with small FSes

2026-02-04T12:30:24+00:00

I was working with some very small ext4 filesystems, used for overlaying on immutable VM/container images. If it's only desired to overlay a single config file, these filesystems can be very small indeed, and so ran afoul of this length check. Since 4fc5ec56f ("device matching against UUIDs: do not try floppies") (from 2009), floppy drives are skipped before this function is even called. Reading from an unused loop device returns 0, so it should be fine to reduce the minimum length. Signed-off-by: Alyssa Ross via busybox Signed-off-by: Denys Vlasenko

fdisk: several fixes for 4K sector size

2026-02-04T08:46:54+00:00

function old new delta bb_getsize_in_512sect - 187 +187 list_disk_name_and_sizes - 80 +80 get_geometry 511 535 +24 .rodata 107066 107088 +22 msg_building_new_label 143 142 -1 fdisk_main 4781 4775 -6 list_table 1423 1366 -57 list_disk_geometry 143 68 -75 bb_BLKGETSIZE_sectors 191 - -191 ------------------------------------------------------------------------------ (add/remove: 2/1 grow/shrink: 2/4 up/down: 313/-330) Total: -17 bytes Signed-off-by: Denys Vlasenko

uuidgen: move UUID formatting to libbb

2026-02-03T08:10:25+00:00

function old new delta format_uuid_DCE_37_chars - 94 +94 uuidgen_main 71 53 -18 .rodata 107089 107066 -23 mkswap_main 278 253 -25 volume_id_set_uuid 258 178 -80 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/4 up/down: 94/-146) Total: -52 bytes Signed-off-by: Denys Vlasenko

decrease paddign: gcc-9.3.1 slaps 32-byte alignment on arrays willy-nilly

2020-11-30T12:03:03+00:00

text data bss dec hex filename 1021988 559 5052 1027599 fae0f busybox_old 1021236 559 5052 1026847 fab1f busybox_unstripped Signed-off-by: Denys Vlasenko

volume_id: improve struct layout (smaller offesets, smaller insns on x86)

2020-11-19T12:58:25+00:00

function old new delta volume_id_probe_xfs 101 98 -3 volume_id_probe_vfat 827 824 -3 volume_id_probe_udf 541 538 -3 volume_id_probe_ubifs 67 64 -3 volume_id_probe_squashfs 86 83 -3 volume_id_probe_romfs 97 94 -3 volume_id_probe_reiserfs 246 243 -3 volume_id_probe_ocfs2 110 107 -3 volume_id_probe_ntfs 288 285 -3 volume_id_probe_nilfs 100 97 -3 volume_id_probe_minix 85 82 -3 volume_id_probe_luks 92 89 -3 volume_id_probe_linux_swap 251 248 -3 volume_id_probe_linux_raid 131 128 -3 volume_id_probe_lfs 62 59 -3 volume_id_probe_jfs 110 107 -3 volume_id_probe_iso9660 318 315 -3 volume_id_probe_f2fs 107 104 -3 volume_id_probe_exfat 285 282 -3 volume_id_probe_erofs 89 86 -3 volume_id_probe_cramfs 67 64 -3 volume_id_probe_btrfs 134 131 -3 volume_id_probe_bcache 107 104 -3 volume_id_probe_sysv 194 188 -6 volume_id_probe_hfs_hfsplus 518 512 -6 add_to_uuid_cache 271 265 -6 volume_id_probe_ext 131 122 -9 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/27 up/down: 0/-96) Total: -96 bytes Signed-off-by: Denys Vlasenko

util-linux: support erofs filesystem

2020-11-18T18:19:23+00:00

Add erofs to the known volume_ids. function old new delta volume_id_probe_erofs - 89 +89 fs1 24 28 +4 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 1/0 up/down: 93/0) Total: 93 bytes Signed-off-by: Norbert Lange Signed-off-by: Denys Vlasenko

libbb: shrink recursive_action() by reducing memory pressure

2020-10-01T19:52:16+00:00

function old new delta recursive_action1 - 316 +316 file_action_grep 161 164 +3 add_to_prg_cache_if_socket 202 205 +3 depmod_main 509 511 +2 writeFileToTarball 488 489 +1 parse_module 281 282 +1 fileAction 207 208 +1 act 189 190 +1 add_to_dirlist 65 64 -1 writeTarFile 196 194 -2 uuidcache_init 47 45 -2 uuidcache_check_device 109 107 -2 true_action 8 6 -2 run_parts_main 310 308 -2 netstat_main 534 532 -2 lsusb_main 29 27 -2 lspci_main 45 43 -2 initial_scan 138 136 -2 grep_main 845 843 -2 find_main 482 480 -2 config_file_action 437 435 -2 chmod_main 142 140 -2 dirAction 14 10 -4 diff_main 1544 1540 -4 chown_main 154 148 -6 skip_dir 136 129 -7 dir_act 191 184 -7 recursive_action 453 69 -384 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 7/20 up/down: 328/-439) Total: -111 bytes Signed-off-by: Denys Vlasenko