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2020-02-17ash: exec: Stricter pathopt parsingDenys Vlasenko
Upstream comment: Date: Sat, 19 May 2018 02:39:50 +0800 exec: Stricter pathopt parsing This patch changes the parsing of pathopt. First of all only %builtin and %func (with arbitrary suffixes) will be recognised. Any other pathopt will be treated as a normal directory. Furthermore, pathopt can now be specified before the directory, rather than after it. In fact, a future version may remove support for pathopt suffixes. Wherever the pathopt is placed, an optional % may be placed after it to terminate the pathopt. This is so that it is less likely that a genuine directory containing a % sign is parsed as a pathopt. Users of padvance outside of exec.c have also been modified: 1) cd(1) will always treat % characters as part of the path. 2) chkmail will continue to accept arbitrary pathopt. 3) find_dot_file will ignore the %builtin pathopt instead of trying to do a stat in the accompanying directory (which is usually the current directory). The patch also removes the clearcmdentry optimisation where we attempt to only partially flush the table where possible. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-17ash: exec: Do not allocate stack string in padvanceDenys Vlasenko
Upstream commit: Date: Sat, 19 May 2018 02:39:48 +0800 exec: Do not allocate stack string in padvance Many callers of padvance immediately free the allocated string so this patch moves the stalloc call to the caller. Instead of returning the allocated string, padvance now returns the length to allocate (this may be longer than the actual string length, even including the NUL). For the case where we would previously return NULL, we now return -1. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-17ash: memalloc: Add growstackto helperDenys Vlasenko
Upstream commit: Date: Sat, 19 May 2018 02:39:46 +0800 memalloc: Add growstackto helper This patch adds the growstackto helper which repeatedly calls growstackblock until the requested size is reached. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-17ash: parser: Save/restore here-documents in command substitutionDenys Vlasenko
Upstream comment: Date: Sat, 19 May 2018 02:39:42 +0800 parser: Save/restore here-documents in command substitution This patch changes the parsing of here-documents within command substitution, both old style and new style. In particular, the original here-document list is saved upon the beginning of parsing command substitution and restored when exiting. This means that here-documents outside of command substitution can no longer be filled by text within it and vice-versa. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-17ash: mkinit: Split reset into exitreset and resetDenys Vlasenko
Upstream commit: Date: Sat, 19 May 2018 02:39:40 +0800 mkinit: Split reset into exitreset and reset Previously reset was called after exitshell. This was changed so that it was called before exitshell because certain state needed to be reset in order for the EXIT trap to work. However, this caused issues because certain other states (such as local variables) should not be reset. This patch fixes this by creating a new function exitreset that is called prior to exitshell and moving reset back to its original location. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-17ash: expand: Fix trailing newlines processing in backquote expandingDenys Vlasenko
Upstream commit: Date: Mon, 29 Apr 2019 19:13:37 +0500 expand: Fix trailing newlines processing in backquote expanding According to POSIX.1-2008 we should remove newlines only at the end of the substitution. Newlines-only substitions causes dash to remove newlines before beggining of the substitution. The following code: cat <<END 1 $(echo "") 2 END prints "1<newline>2" instead of expected "1<newline><newline>2". This patch fixes trailing newlines processing in backquote expanding. Signed-off-by: Nikolai Merinov <n.merinov@inango-systems.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-17ash: parser: Only accept single-digit parameter expansion outside of bracesDenys Vlasenko
Upstream commit: Date: Mon, 27 May 2019 13:39:37 +0800 parser: Only accept single-digit parameter expansion outside of braces This patch should fix the problem. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: shell: Fix clang warnings about "string plus integer"Denys Vlasenko
Upstream commit: Date: Sat, 15 Dec 2018 18:49:31 +0100 shell: Fix clang warnings about "string plus integer" Building with clang results in some warnings about integer values being added to strings. While the code itself is fine and the warnings are indeed harmless, fixing them also makes the semantic more explicit: what it is actually being increased is the address which points to the start of the string in order to skip the initial character when some conditions are met. Signed-off-by: Antonio Ospite <ao2@ao2.it> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: eval: Use the correct expansion mode for fd redirectionDenys Vlasenko
Upstream comment: Date: Mon, 19 Nov 2018 18:00:32 +0800 eval: Use the correct expansion mode for fd redirection It has been reported that echo test >&$EMPTY_VARIABLE causes dash to segfault. This is a symptom of the bigger problem that dash tries to perform pathname expansion as well as field splitting on the word after >& and <&. This is wrong and this patch fixes it to use the same expansions as done on a normal redirection. Reported-by: Andrej Shadura <andrew.shadura@collabora.co.uk> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: expand: Fix skipping of command substitution when trimming in evalvarDenys Vlasenko
Upstream commit: Date: Mon, 28 May 2018 17:09:48 +0800 expand: Fix skipping of command substitution when trimming in evalvar When we are trimming an unset variable in evalvar, any embedded command substitution that should have been skipped are not. This can cause them to be evaluated later should there be other command substitutions in the same input word. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: main: Print \n upon EOF (CTRL-D) when run interactivelyDenys Vlasenko
Upstream comment: Date: Fri, 7 Sep 2018 10:34:14 +0200 main: Print \n upon EOF (CTRL-D) when run interactively Exiting dash via a ^D instead of with "exit" causes dash to forget to print a newline. sh-3.1$ sh sh-3.1$ ^D sh-3.1$ dash $ sh-3.1$ It is more neat and tidy to send a newline similarly to what bash does, so it doesn't make the next prompt of the parent shell look ugly. Suggested by jidanni. Signed-off-by: Gerrit Pape <pape@smarden.org> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> [reworded the patch description] Signed-off-by: Andrej Shadura <andrew.shadura@collabora.co.uk> Bug-Debian: http://bugs.debian.org/476422 Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: expand: Use HOME in tilde expansion when it is emptyDenys Vlasenko
Upstream commit: Date: Sun, 27 May 2018 17:31:57 +0800 expand: Use HOME in tilde expansion when it is empty Currently if HOME is set to empty tilde expansion will fail, i.e., it will remain as a literal tilde. This patch changes it to return the empty string as required by POSIX. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: builtin: Mark more regular built-insDenys Vlasenko
Upstream commit: Date: Sat, 19 May 2018 02:39:49 +0800 builtin: Mark more regular built-ins This patch marks the following built-ins as regular, meaning that they cannot be overriden using PATH search: hash pwd type ulimit Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: jobs: Replace some uses of fmtstr with stpcpy/stpncpyDenys Vlasenko
Upstream commit: Date: Sat, 19 May 2018 02:39:45 +0800 jobs: Replace some uses of fmtstr with stpcpy/stpncpy Some uses of fmtstr, particularly the ones without a format string, can be replaced with stpcpy or stpncpy. This patch does that so we don't have to introduce unnecessary format strings in order to silence compiler warnings. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: output: Fix fmtstr return valueDenys Vlasenko
Upstream commit: Date: Sat, 19 May 2018 02:39:44 +0800 output: Fix fmtstr return value The function fmtstr is meant to return the actual length of output produced, rather than the untruncated length. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: main: Only set savestatus in exitcmdDenys Vlasenko
Upstream commit: Date: Sat, 19 May 2018 02:39:38 +0800 main: Only set savestatus in exitcmd Currently exitcmd sets exitstatus and then savestatus if the latter was previously set. In fact, as exitcmd always raises an exception and will either end up in the setjmp call in main() or exitshell(), where exitstatus is always replaced by savestatus if set, we only need to set savestatus. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: [BUILTIN] Exit without arguments in a trap should use status outside trapsDenys Vlasenko
Upstream commit: Date: Mon Oct 6 10:39:47 2014 +0800 [BUILTIN] Exit without arguments in a trap should use status outside traps POSIX now requires that exit without arguments in a trap should return the last command status prior to executing traps. This patch implements this behaviour. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: parser: Fix incorrect eating of backslash newlinesDenys Vlasenko
Keeping up with upstream (in our case, 'before patch' code is not buggy). Upstream commit: Date: Fri, 11 May 2018 23:41:25 +0800 parser: Fix incorrect eating of backslash newlines With the introduction of synstack->syntax, a number of references to the syntax variable was missed during the conversion. This causes backslash newlines to be incorrectly removed in single quote context. This patch also combines these calls into a new helper function pgetc_top. Fixes: ab1cecb40478 ("parser: Add syntax stack for recursive...") Reported-by: Leah Neukirchen <leah@vuxu.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-16ash: use pgetc_eatbnl() in more places, take 2Denys Vlasenko
Adding previously skipped "readtoken1(pgetc_eatbnl(), DQSYNTAX..." changes from upstream commit: Date: Thu Mar 8 08:37:11 2018 +0100 Author: Harald van Dijk <harald@gigawatt.nl> parser: use pgetc_eatbnl() in more places dash has a pgetc_eatbnl function in parser.c which skips any backslash-newline combinations. It's not used everywhere it could be. There is also some duplicated backslash-newline handling elsewhere in parser.c. Replace most of the calls to pgetc() with calls to pgetc_eatbnl() and remove the duplicated backslash-newline handling. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-01-29ash,hush: allow builtins to be tab-completed, closes 7532Ron Yorston
function old new delta complete_cmd_dir_file 678 830 +152 get_builtin_name - 35 +35 optschanged 125 132 +7 hush_main 1069 1076 +7 save_command_ps_at_cur_history 76 78 +2 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 4/0 up/down: 203/0) Total: 203 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-01-29ash: improve expandstr()Ron Yorston
The dash maintainer recently posted a fix for issues with expanding PS1. These had already been fixed differently in BusyBox ash. Borrow a couple of improvements: - Use a single call to setjmp() to trap errors in both readtoken1() and expandarg(). - In case of error set the prompt to the literal value of PS1 rather than the half-digested nonsense in stackblock() which might include ugly control characters. function old new delta expandstr 353 300 -53 Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-11-28hush: fix preprocessor directives indentationDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-11-01hush: restore redirected stdinDenys Vlasenko
function old new delta restore_redirects 52 95 +43 save_fd_on_redirect 243 253 +10 hfopen 90 99 +9 fgetc_interactive 259 261 +2 builtin_type 117 115 -2 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/1 up/down: 64/-2) Total: 62 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-25clang/llvm 9 fix - do not eliminate a store to a fake "const"Denys Vlasenko
This is *much* better (9 kbytes better) than dropping "*const" optimization trick. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-22shell: better comments in BASE#nn codeDenys Vlasenko
function old new delta evaluate_string 932 930 -2 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-21shell/ulimit: code shrinkDenys Vlasenko
text data bss dec hex filename 1001949 551 5612 1008112 f61f0 busybox_old 1001906 551 5612 1008069 f61c5 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-09-22ash: fix BASE###nn bashism for bases 36..64Denys Vlasenko
function old new delta evaluate_string 876 932 +56 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-09-22ash: fix BASE###nn bashism to accept letter 'digits' for bases > 9Denys Vlasenko
function old new delta evaluate_string 873 876 +3 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-09-05ash: add a FIXME commentDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-09-05hush: fix "set -o INVALID" affecting -e flag stateDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-08-02ash: fix set -o to not show "nameless" optionsDenys Vlasenko
Patch by Martijn Dekker <martijn@inlv.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-31ash: only catch unexpected exceptions in PS1 expansionRon Yorston
Commit d1a2fa2a4 (ash: catch error in arithmetic expansion in PS1) catches all exceptions raised by expandarg(). Some exceptions, such as the EXEXIT raised when command expansion is used, are expected: export PS1='$(echo "$ ")' These should be processed normally or the shell hangs at the prompt. function old new delta expandstr 344 353 +9 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/0 up/down: 9/0) Total: 9 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02libbb: reduce the overhead of single parameter bb_error_msg() callsJames Byrne
Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-03ash,hush: show 'c' in $- if run in "sh -c CMD"Denys Vlasenko
function old new delta options 552 599 +47 expand_one_var 2375 2385 +10 optletters_optnames 60 64 +4 hush_main 1108 1111 +3 ash_main 1150 1152 +2 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/0 up/down: 66/0) Total: 66 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-01ash: allocate line editing structure only if neededDenys Vlasenko
function old new delta optschanged 91 128 +37 historycmd 13 17 +4 setcmd 80 78 -2 ash_main 1167 1150 -17 options 576 552 -24 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/3 up/down: 41/-43) Total: -2 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-26shell: move all definitions of strto_arith_t() togetherDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-19hush: show 's' in $-Denys Vlasenko
function old new delta expand_one_var 2362 2375 +13 hush_main 1104 1108 +4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 17/0) Total: 17 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-19hush: allocate line edit buffer only for interactive shellDenys Vlasenko
function old new delta builtin_history 16 20 +4 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-19shell: implement optional "BASE#nnnn" numeric literalsDenys Vlasenko
function old new delta evaluate_string 729 851 +122 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-19hush: remove test for "echo ${-}" errorring out - now it worksDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-19hush: implement $-, set default PATH if it is not set on startupDenys Vlasenko
function old new delta expand_one_var 2311 2362 +51 hush_main 1075 1104 +29 parse_dollar 790 791 +1 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/0 up/down: 81/0) Total: 81 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-19hush: set default PS1/2 only if we interactiveDenys Vlasenko
"env - hush SCRIPT" invocation (that is, with empty environment) should not show PS1/2 in "set" output. function old new delta hush_main 1070 1075 +5 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-19hush: handle LINENO the same way as RANDOM: variable is "ephemeral"Denys Vlasenko
"env - hush" invocation (that is, with empty environment) should not show LINENO in "set" output. function old new delta get_local_var_value 263 294 +31 hush_main 1105 1070 -35 handle_changed_special_names 79 38 -41 run_pipe 1834 1765 -69 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/3 up/down: 31/-145) Total: -114 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-16hush: remove code to track PS1/2 values dynamically - it's too much workDenys Vlasenko
Assignments / exports / unsets of variables are far more frequent than prompt printing, and if we show prompt, we are likely to be limited by user typing speed - do not optimize for that scenario. Just re-query $PS1 / $PS2 values when need to show the prompt. function old new delta fgetc_interactive 236 259 +23 set_vars_and_save_old 150 147 -3 pseudo_exec_argv 597 594 -3 hush_main 1110 1105 -5 enter_var_nest_level 38 32 -6 builtin_local 56 50 -6 run_pipe 1857 1834 -23 leave_var_nest_level 127 98 -29 handle_changed_special_names 111 79 -32 cmdedit_update_prompt 57 - -57 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 1/8 up/down: 23/-164) Total: -141 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-16hush: small speedup in handle_changed_special_names()Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-16shell: add TODO comment about BASE#nnn literalsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-15hush: fix quoted "${notexist-}" expansion to not disappearDenys Vlasenko
function old new delta expand_one_var 2296 2311 +15 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-14shells: add tests for backslashes in export VAR=VALDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-14hush: fix "export PS1=xyz" and "local PS1=xyz" messing up promptDenys Vlasenko
function old new delta helper_export_local 215 253 +38 leave_var_nest_level 107 127 +20 run_pipe 1840 1857 +17 handle_changed_special_names 101 105 +4 shell_builtin_read 1399 1398 -1 done_word 767 766 -1 parse_stream 2249 2245 -4 set_local_var 437 430 -7 is_well_formed_var_name 66 - -66 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 4/4 up/down: 79/-79) Total: 0 bytes text data bss dec hex filename 952376 485 7296 960157 ea69d busybox_old 952400 485 7296 960181 ea6b5 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-28ash,hush: ulimit: add -i RLIMIT_SIGPENDING, -q RLIMIT_MSGQUEUEDenys Vlasenko
function old new delta limits_tbl 104 120 +16 ulimit_opt_string 44 50 +6 limit_chars 14 16 +2 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/0 up/down: 24/0) Total: 24 bytes text data bss dec hex filename 981996 485 7296 989777 f1a51 busybox_old 982065 485 7296 989846 f1a96 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-23 19:43:18 +0000