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2022-04-30seedrng: remove redundant assignmentDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-30seedrng: re-add fsync after unlink, and explain its purposeDenys Vlasenko
function old new delta seedrng_main 1003 1022 +19 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-30seedrng: include fiel/dir names in error messagesDenys Vlasenko
function old new delta .rodata 104898 104900 +2 seedrng_main 1011 1003 -8 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 2/-8) Total: -6 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-30seedrng: use more xfuncs where appropriateDenys Vlasenko
function old new delta .rodata 104929 104898 -31 seedrng_main 1050 1011 -39 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-30seedrng: code shrinkDenys Vlasenko
Struct initializers do this double init: ># util-linux/seedrng.c:88: struct pollfd random_fd = { movl $0, 132(%esp) #, random_fd movl $0, 136(%esp) #, random_fd ... ># util-linux/seedrng.c:88: struct pollfd random_fd = { movl %eax, 140(%esp) # _110, random_fd.fd movw $1, 144(%esp) #, random_fd.events and close(random_fd.fd) needs to pull the item from the stack: pushl 132(%esp) # random_fd.fd call close # function old new delta seedrng_main 1076 1050 -26 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-30seedrng: simplify read_new_seed() to not have error returnDenys Vlasenko
gcc in fact detects this and does this transformation when generating code - no object code changes. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-30seedrng: prepare read_new_seed() to not need a "success" retvalDenys Vlasenko
We do not expect /dev/[u]random to be not openable/readable. If they are, just bail out (something is obviously very wrong). function old new delta seedrng_main 1077 1076 -1 .rodata 104939 104929 -10 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-30seedrng: do not try to continue on unexpected errors (just exit)Denys Vlasenko
function old new delta .rodata 104946 104938 -8 seedrng_main 1225 1077 -148 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-156) Total: -156 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-30ifplugd: split -a into -a and -A, latter disables upping in iface creationDenys Vlasenko
-a meant both "don't up iface before each link detection" and "don't up iface when it newly appears". But they are not the same. I have a dock station where eth1 appears when I attach the notebook to it (looks like it's hanging off a USB bus). IOW: appearance of this interface is functionally equivalent to attaching ethernet cable. ifplugd meant to be able to *automatically* handle this case. Currently, with -a, it couldn't: newly appearing iface stayed down, user had to manually up it. function old new delta packed_usage 34253 34296 +43 .rodata 104876 104877 +1 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 44/0) Total: 44 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-27seedrng: chdir to the SEED_DIRECTORY - avoid concat_path_file'sDenys Vlasenko
function old new delta seedrng_main 1273 1225 -48 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-27seedrng: shorten stringsDenys Vlasenko
function old new delta .rodata 104894 104876 -18 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-27seedrng: remove unnecessary zero-filling of local variablesDenys Vlasenko
function old new delta seedrng_main 1292 1273 -19 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-27seedrng: remove unnecessary zero-filling of local variablesDenys Vlasenko
function old new delta seedrng_main 1323 1292 -31 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-27seedrng: shrink --help textDenys Vlasenko
function old new delta packed_usage 34280 34253 -27 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-27libbb: fix fallout from nth_string() robustification, closes 14726Denys Vlasenko
function old new delta parse_common 187 228 +41 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-04-24kbuild: Prefer -Oz over -OsBernhard Reutner-Fischer
-Oz Optimize aggressively for size rather than speed. with gcc-12 so far (i think only https://gcc.gnu.org/PR32803 and 103773 ) "shorter load imm on x86_64": (add/remove: 0/0 grow/shrink: 4/1670 up/down: 6/-13196) Total: -13190 bytes text data bss dec hex filename 975753 4227 1816 981796 efb24 busybox_old 962442 4227 1816 968485 ec725 busybox_unstripped with clang-15: (add/remove: 394/34 grow/shrink: 161/1856 up/down: 18644/-98946)Total: -80302 bytes text data bss dec hex filename 1120994 16066 1696 1138756 116044 busybox_old 1040689 16026 1696 1058411 10266b busybox_unstripped Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-24seedrng: prune header includesJason A. Donenfeld
Remove redundant includes. We have platform specific handling in libbb.h and platform.h so we can handle quirks in a central place. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-24seedrng: code-golf even smallerJason A. Donenfeld
Since we're passing 0 as the timeout, we don't need safe_poll. Remove cleanup at end of program, since OS does that, which lets us simplify control flow. Factor repeated function calls into ternary loop. function old new delta seedrng_main 1061 1459 +398 seed_from_file_if_exists 468 - -468 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/0 up/down: 398/-468) Total: -70 bytes text data bss dec hex filename 1052781 16515 1816 1071112 105808 busybox_old 1052711 16515 1816 1071042 1057c2 busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-21kbuild: fix building sha256Bernhard Reutner-Fischer
Pass down the correct EXTRA_CFLAGS to the compiler driver when building assembler source. Otherwise building busybox for a multilib other than the default failed to link since hash_md5_sha256_x86-64_shaNI.o and hash_md5_sha_x86-64_shaNI.o were built for the default arch which might not what we requested in the EXTRA_CFLAGS. Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20vi: fix backspace over tab in commandsRon Yorston
Colon and search commands are entered on the status line. Since the cursor position wasn't being tracked backspacing over a tab resulted in a mismatch between the actual and apparent content of the command. function old new delta get_input_line 178 180 +2 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/0 up/down: 2/0) Total: 2 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20seedrng: compress format strings with %s argumentsJason A. Donenfeld
- Avoid an xstrdup call with seed_dir. - Compress format strings with %s arguments. - Open /dev/urandom for add entropy ioctl rather than /dev/random, so that /dev/random is only used for the already-sightly-flawed poll() check for creditability. function old new delta seedrng_main 948 958 +10 seed_from_file_if_exists 410 417 +7 .rodata 108338 108206 -132 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 17/-132) Total: -115 bytes text data bss dec hex filename 975829 4227 1816 981872 efb70 busybox_old 975714 4227 1816 981757 efafd busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20seedrng: avoid needless runtime strlen() callJason A. Donenfeld
- Avoid needless runtime strlen() call, bloating binary. - Replace failed seed string with series of nulls. function old new delta .rodata 108350 108338 -12 static.seedrng_prefix 26 - -26 seedrng_main 1000 948 -52 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 0/2 up/down: 0/-90) Total: -90 bytes text data bss dec hex filename 975919 4227 1816 981962 efbca busybox_old 975829 4227 1816 981872 efb70 busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20seedrng: use predefined strings where possibleJason A. Donenfeld
- Use predefined strings where possible. - Open /dev/random with O_RDONLY for ioctl(). function old new delta seed_from_file_if_exists 413 410 -3 .rodata 108407 108350 -57 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-60) Total: -60 bytes text data bss dec hex filename 975979 4227 1816 982022 efc06 busybox_old 975919 4227 1816 981962 efbca busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20seedrng: further reduce sizeJason A. Donenfeld
- Remove all games with errno to further reduce code size. - Combine error messages that don't benefit from being separated. - Lock directory fd instead of separate file. function old new delta static.longopts 38 26 -12 seed_from_file_if_exists 426 413 -13 packed_usage 34519 34480 -39 .rodata 108484 108407 -77 seedrng_main 1088 1000 -88 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/5 up/down: 0/-229) Total: -229 bytes text data bss dec hex filename 976208 4227 1816 982251 efceb busybox_old 975979 4227 1816 982022 efc06 busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20seedrng: remove some global variablesJason A. Donenfeld
- Remove global variables and pass dfd by value, opened once instead of twice, which shaves off some more bytes. function old new delta seedrng_main 1086 1088 +2 seed_dir 8 - -8 non_creditable_seed 8 - -8 lock_file 8 - -8 creditable_seed 8 - -8 seed_from_file_if_exists 456 426 -30 ------------------------------------------------------------------------------ (add/remove: 0/4 grow/shrink: 1/1 up/down: 2/-62) Total: -60 bytes text data bss dec hex filename 976236 4227 1848 982311 efd27 busybox_old 976208 4227 1816 982251 efceb busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20seedrng: hoist bb_strtoul out of min/maxJason A. Donenfeld
- Hoist bb_strtoul out of min/max to prevent quadruple evaluation. - Don't use separate variables for boottime/realtime. - Make use of ENABLE_FEATURE_CLEAN_UP where appropriate. - Order hash initialization after lock taking per Bernhard's taste. - Add comment description of theory of operation. function old new delta seed_from_file_if_exists 533 456 -77 seedrng_main 1218 1086 -132 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-209) Total: -209 bytes text data bss dec hex filename 976445 4227 1848 982520 efdf8 busybox_old 976236 4227 1848 982311 efd27 busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20seedrng: use libbb functionsJason A. Donenfeld
- Make extensive use of libbb.h functions, which simplify a lot of code and reduce binary size considerably. - Use the already existing PID_FILE_PATH variable. function old new delta seed_from_file_if_exists 697 533 -164 .rodata 108665 108484 -181 seedrng_main 1463 1218 -245 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-590) Total: -590 bytes text data bss dec hex filename 977035 4227 1848 983110 f0046 busybox_old 976445 4227 1848 982520 efdf8 busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-04-20seedrng: import SeedRNG utility for kernel RNG seed filesJason A. Donenfeld
The RNG can't actually be seeded from a shell script, due to the reliance on ioctls and the fact that entropy written into the unprivileged /dev/urandom device is not immediately mixed in, making subsequent seed reads dangerous. For this reason, the seedrng project provides a basic "C script" meant to be copy and pasted into projects like Busybox and tweaked as needed: <https://git.zx2c4.com/seedrng/about/>. The SeedRNG construction has been part of systemd's seeder since January, and recently was added to Android, OpenRC, and Void's Runit, with more integrations on their way depending on context. Virtually every single Busybox-based distro I have seen seeds things in wrong, incomplete, or otherwise dangerous way. For example, fixing this issue in Buildroot requires first for Busybox to have this fix. This commit imports it into Busybox and wires up the basic config. The utility itself is tiny, and unlike the example code from the SeedRNG project, we can re-use libbb's existing hash functions, rather than having to ship a standalone BLAKE2s, which makes this even smaller. function old new delta seedrng_main - 1463 +1463 .rodata 107858 108665 +807 seed_from_file_if_exists - 697 +697 packed_usage 34414 34519 +105 static.longopts - 38 +38 static.seedrng_prefix - 26 +26 seed_dir - 8 +8 non_creditable_seed - 8 +8 lock_file - 8 +8 creditable_seed - 8 +8 applet_names 2747 2755 +8 applet_main 3192 3200 +8 ------------------------------------------------------------------------------ (add/remove: 9/0 grow/shrink: 4/0 up/down: 3184/0) Total: 3184 bytes text data bss dec hex filename 973776 4219 1816 979811 ef363 busybox_old 977035 4227 1848 983110 f0046 busybox_unstripped Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2022-03-04vi: improved handling of backspace in replace modeRon Yorston
In replace mode ('R' command) the backspace character should get special treatment: - backspace only goes back to the start of the replacement; - backspacing over replaced characters restores the original text. Prior to this commit BusyBox vi deleted the characters both before and after the cursor in replace mode. function old new delta undo_pop - 235 +235 char_insert 858 884 +26 indicate_error 81 84 +3 find_range 654 657 +3 static.text_yank 77 79 +2 do_cmd 4486 4243 -243 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 4/1 up/down: 269/-243) Total: 26 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-03-01taskset: fix printf format mismatch in !FEATURE_TASKSET_FANCY config. closes ↵Denys Vlasenko
14616 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-03-01ash: do not truncate failed tilde expansion on unknown user namesDenys Vlasenko
Do not skip over "*p = c;" statement. Testcase: echo ~~nouser/qwe function old new delta argstr 1396 1406 +10 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-03-01ash: fix unsafe use of mempcpyDenys Vlasenko
function old new delta subevalvar 1549 1557 +8 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-03-01ash: don't read past end of var in subvareval for bash substitutionsSören Tempel
Without this patch, BusyBox handles bash pattern substitutions without a terminating '/' character incorrectly. Consider the following shell script: _bootstrapver=5.0.211-r0 _referencesdir="/usr/${_bootstrapver/-*}/Sources" echo $_referencesdir This should output `/usr/5.0.211/Sources`. However, without this patch it instead outputs `/usr/5.0.211Sources`. This is due to the fact that BusyBox expects the bash pattern substitutions to always be terminated with a '/' (at least in this part of subvareval) and thus reads passed the substitution itself and consumes the '/' character which is part of the literal string. If there is no '/' after the substitution then BusyBox might perform an out-of-bounds read under certain circumstances. When replacing the bash pattern substitution with `${_bootstrapver/-*/}`, or with this patch applied, ash outputs the correct value. Signed-off-by: Sören Tempel <soeren@soeren-tempel.net> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-18libbb/sha1: update config help text with new performance numbersDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-12libbb/sha256: explicitly use sha256rnds2's %xmm0 (MSG) argumentDenys Vlasenko
Else, the code seemingly does not use MSG. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-11whitespace fixesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-11libbb/sha1: revert last commit: pshufb is a SSSE3 insn, can't use itDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-11libbb/sha1: shrink unrolled x86-64 codeDenys Vlasenko
function old new delta sha1_process_block64 3481 3384 -97 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-10libbb/sha: improve commentsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-09whitespace fixDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-09libbb/sha256: code shrink in x86 assemblyDenys Vlasenko
function old new delta sha256_process_block64_shaNI 32-bit 676 673 -3 sha256_process_block64_shaNI 64-bit 680 677 -3 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-09libbb/sha256: code shrink in 64-bit x86Denys Vlasenko
function old new delta sha256_process_block64_shaNI 701 680 -21 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-09libbb/sha256: code shrink in 32-bit x86Denys Vlasenko
function old new delta sha256_process_block64_shaNI 697 676 -21 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-09libbb/sha256: code shrink in 32-bit x86Denys Vlasenko
function old new delta sha256_process_block64_shaNI 713 697 -16 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-08libbb/sha1: shrink x86 hardware accelerated hashing (32-bit)Denys Vlasenko
function old new delta sha1_process_block64_shaNI 511 507 -4 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-08libbb/sha1: shrink x86 hardware accelerated hashing (32-bit)Denys Vlasenko
function old new delta sha1_process_block64_shaNI 517 511 -6 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-08libbb/sha1: shrink x86 hardware accelerated hashingDenys Vlasenko
function old new delta sha1_process_block64_shaNI 32-bit 524 517 -7 sha1_process_block64_shaNI 64-bit 510 508 -2 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-08libbb/sha1: shrink unrolled x86-64 codeDenys Vlasenko
function old new delta sha1_process_block64 3482 3481 -1 .rodata 108460 108412 -48 ------------------------------------------------------------------------------ (add/remove: 1/4 grow/shrink: 0/2 up/down: 0/-49) Total: -49 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-07libbb/sha1: shrink and speed up unrolled x86-64 codeDenys Vlasenko
function old new delta sha1_process_block64 3514 3482 -32 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-06*: slap on a few ALIGN_PTR where appropriateDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
generated by cgit v1.1 at 2024-11-01 18:24:12 +0000