busybox-w32, branch cng_backend

Use Windows library for cryptographic checksums

2025-06-09T12:23:49+00:00

Add a new feature to libbb, FEATURE_USE_CNG_API, which enables the use of the Cryptography API: Next Generation library to calculate checksums. It is disabled by default except in the mingw64u default config, as the API requires Windows 10+ to function. Usage of this API provides a size benefit and delegates hardware optimizations to the operating system cryptography library. Based on GitHub PR #498 by rfl890. Saves 4064 bytes in the mingw64u case.

win32: update implementation of select(2)

2025-05-26T13:37:42+00:00

Apply gnulib commit 034af0e401 (select, pselect: Fix test failure on native Windows). * lib/select.c (rpl_select): Fail if nfds is out-of-range. * lib/pselect.c (pselect): Likewise.

win32: update implementation of strptime(3)

2025-05-26T13:37:07+00:00

Changes are mostly cosmetic.

win32: update inet_pton(3) implementation

2025-05-26T13:35:04+00:00

Apply musl commit 7e13e5ae (inet_pton: fix uninitialized memory use for IPv4-mapped IPv6 addresses). When a dot is encountered, the loop counter is incremented before exiting the loop, but the corresponding ip array element is left uninitialized, so the subsequent memmove (if "::" was seen) and the loop copying ip to the output buffer will operate on an uninitialized uint16_t. The uninitialized data never directly influences the control flow and is overwritten on successful return by the second half of the parsed IPv4 address. But it's better to fix this to avoid unexpected transformations by a sufficiently smart compiler and reports from UB-detection tools. Adds 16 bytes.

win32: update glob(3) implementation

2025-05-26T13:32:15+00:00

Apply musl commit 79bdacff (glob: fix wrong return code when aborting before any matches). when the result count was zero, glob was ignoring a possible GLOB_ABORTED error code and returning GLOB_NOMATCH. whether this happened could be nondeterministic and dependent on the order of dirent enumeration, in cases where multiple matches were present and only some produced errors.

Merge branch 'busybox' into merge

2025-05-19T07:34:32+00:00

build system: include stack unwind tables

2025-05-18T10:28:13+00:00

Commit 9b80b903c7 (build system: stop .eh_frame generation) added compiler flags to prevent unwind tables being included in the binary. BusyBox doesn't normally require such tables and the size of the binary was much reduced. Windows' Control Flow Guard feature needs unwind tables. Without them calls to longjmp(3), widely used in BusyBox, fail. Add a configuration option to control whether or not unwind tables are included. (GitHub issue #495)

cpio: error out if the file to be achived is >=4GB

2025-04-21T02:42:33+00:00

function old new delta .rodata 105715 105751 +36 cpio_o 1145 1167 +22 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 58/0) Total: 58 bytes Signed-off-by: Denys Vlasenko

rpm2cpio: extract cpio even if compression is not known

2025-04-20T21:59:38+00:00

This is more useful than failing outright. function old new delta rpm2cpio_main 110 144 +34 .rodata 105681 105715 +34 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 68/0) Total: 68 bytes Signed-off-by: Denys Vlasenko

libbb/archival: make setup_unzip_on_fd() return bytes read if not compressed

2025-04-20T21:49:33+00:00

setup_unzip_on_fd() does not return the transformer structure, so the user does not know how much to seek back (or alternatively what the signature was) when compressor signature is not detected. Currently not needed (the only user is tar which dies anyway). However, rpm2cpio may need this if we extend it to extract the internal .cpio even if cpio's compressions algo is not known. function old new delta setup_unzip_on_fd 53 59 +6 Signed-off-by: Denys Vlasenko