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2022-06-26ash,hush: use HOME for tab completion and promptsRon Yorston
ash and hush correctly use the value of HOME for tilde expansion. However the line editing code in libbb obtains the user's home directory by calling getpwuid(). Thus tildes in tab completion and prompts may be interpreted differently than in tilde expansion. When the line editing code is invoked from a shell make it use the shell's interpretation of tilde. This is similar to how GNU readline and bash collaborate. function old new delta get_homedir_or_NULL 29 72 +43 optschanged 119 126 +7 hush_main 1204 1211 +7 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/0 up/down: 57/0) Total: 57 bytes v2: Always check for HOME before trying the password database: this is what GNU readline does. Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-05-01style fixDenys Vlasenko
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>
2022-02-06*: slap on a few ALIGN_PTR where appropriateDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-02-06*: slap on a few ALIGN* where appropriateDenys Vlasenko
The result of looking at "grep -F -B2 '*fill*' busybox_unstripped.map" function old new delta .rodata 108586 108460 -126 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-126) Total: -126 bytes text data bss dec hex filename 970412 4219 1848 976479 ee65f busybox_old 970286 4219 1848 976353 ee5e1 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-01-17ash,hush: fix handling of SIGINT while waiting for interactive inputDenys Vlasenko
function old new delta lineedit_read_key 160 237 +77 __pgetc 522 589 +67 fgetc_interactive 244 309 +65 safe_read_key - 39 +39 read_key 588 607 +19 record_pending_signo 23 32 +9 signal_handler 75 81 +6 .rodata 104312 104309 -3 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 6/1 up/down: 282/-3) Total: 279 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-01-16shell: add comments about SIGINT-related problemsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-01-13libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIRDenys Vlasenko
Double negatives are hard to grok. function old new delta login_main 986 988 +2 su_main 474 470 -4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 2/-4) Total: -2 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-01-13ash: ^C with SIG_INGed SIGINT should not exit the shellDenys Vlasenko
function old new delta __pgetc 501 522 +21 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-01-12reset: better --help textDenys Vlasenko
function old new delta packed_usage 34175 34233 +58 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2022-01-05libbb: code shrink: introduce and use [_]exit_SUCCESS()Denys Vlasenko
function old new delta exit_SUCCESS - 7 +7 _exit_SUCCESS - 7 +7 run_pipe 1562 1567 +5 pseudo_exec_argv 399 400 +1 finish 86 87 +1 start_stop_daemon_main 1109 1107 -2 shutdown_on_signal 38 36 -2 runsv_main 1662 1660 -2 redirect 1070 1068 -2 read_line 79 77 -2 pause_and_low_level_reboot 54 52 -2 list_i2c_busses_and_exit 483 481 -2 less_exit 12 10 -2 identify 4123 4121 -2 grep_file 1161 1159 -2 getty_main 1519 1517 -2 fsck_minix_main 2681 2679 -2 free_session 132 130 -2 fdisk_main 4739 4737 -2 clean_up_and_exit 53 51 -2 bsd_select 1566 1564 -2 bb_daemonize_or_rexec 198 196 -2 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 3/17 up/down: 21/-34) Total: -13 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-13shell: tweak --helpDenys Vlasenko
Even though formally it is -s [ARGS], "sh -s" without ARGS is the same as just "sh". And we are already over 80 chars wide for ash --help, so make it shorter. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-13hush: in a comment, document what -i might be doingDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-12shell: use more compact SHELL_ASH / HUSH config defines. no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-11shell: fix script's comm field if ENABLE_FEATURE_PREFER_APPLETS=yDenys Vlasenko
function old new delta re_execed_comm - 46 +46 main 72 86 +14 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/0 up/down: 60/0) Total: 60 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-10*: add NOINLINEs where code noticeably shrinksDenys Vlasenko
function old new delta display 85 1463 +1378 -73 bytes select_and_cluster - 1088 +1088 -139 bytes parse_reply - 979 +979 -109 bytes zbc_num_sqrt - 632 +632 -191 bytes show_bridge_port - 585 +585 -56 bytes sp_256_proj_point_add_8 - 576 +576 -45 bytes encode_then_append_var_plusminus - 554 +554 -118 bytes read_mode_db - 537 +537 -47 bytes fbset_main 1331 747 -584 sp_256_ecc_mulmod_8 1157 536 -621 brctl_main 2189 1548 -641 expand_one_var 2544 1872 -672 zxc_vm_process 6412 5589 -823 send_queries 1813 725 -1088 recv_and_process_peer_pkt 2245 1018 -1227 bb_dump_dump 1531 80 -1451 ------------------------------------------------------------------------------ (add/remove: 7/0 grow/shrink: 1/8 up/down: 6329/-7107) Total: -778 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-09Make const ptr assign as function call in clangYU Jincheng
- This can act as memory barrier in clang to avoid read before assign of a const ptr Signed-off-by: LoveSy <shana@zju.edu.cn> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-09hush: speed up ${x//\*/|} tooDenys Vlasenko
function old new delta expand_one_var 2502 2544 +42 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-09ash: speed up ${x//\*/|} too, make it independent of ASH_OPTIMIZE_FOR_SIZEDenys Vlasenko
function old new delta subevalvar 1503 1545 +42 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-09ash.c: speedup ${s:} substring (no quotes)Alin Mr
This trivial patch makes ${s:...} at least as fast as ${s#??..} in simple tests. It's probably faster for longer substrings, but then one wouldn't use ${s#"1024???s"} anyway - one would switch away from sh. function old new delta subevalvar 1457 1503 +46 Signed-off-by: Alin Mr <almr.oss@outlook.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-10-07*: generalize "const trick"YU Jincheng
While at it, change all "__asm__" to "asm" Co-authored-by: canyie <31466456+canyie@users.noreply.github.com> Signed-off-by: YU Jincheng <shana@zju.edu.cn> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-28ash: fix compile breakage in !ENABLE_ASH_ALIAS configDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-26shell: fix parsing of $(( (v)++ + NUM ))Denys Vlasenko
function old new delta evaluate_string 988 1011 +23 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-25shell: enable more tests which are passing nowDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-25shell: fix arithmentic evaluation of "++7" and such (it is + + 7, i.e. 7)Denys Vlasenko
function old new delta evaluate_string 945 988 +43 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-15ash: introduce bash-like $FUNCNAMEDenys Vlasenko
Patch adapted from Roberto A. Foglietta <roberto.foglietta@gmail.com> work. function old new delta lookupvar 106 150 +44 evalfun 369 408 +39 ash_main 1218 1242 +24 varinit_data 156 168 +12 .rodata 104162 104172 +10 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/0 up/down: 129/0) Total: 129 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-14ash: let ignoreeof only affect interactive shellsRon Yorston
Commit fb7d6c89 from Harald van Dijk's gwsh variant of ash (https://github.com/hvdijk/gwsh): ignoreeof is documented as only having an effect for interactive shells, but is implemented as having mostly the same effect for interactive shells as for non-interactive shells. Change the implementation to match the documentation. Test case: $SHELL -o ignoreeof /dev/null function old new delta cmdloop 359 361 +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: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-14ash: stopped jobs should only prevent exit from interactive shellRon Yorston
When the user tries to exit an interactive shell with stopped jobs present the shell issues a warning and only exits if the user insists by trying to exit again. This shouldn't apply to non-interactive shells. Reported-by: Roberto A. Foglietta <roberto.foglietta@gmail.com> Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-14ash: fix ignoreeof optionRon Yorston
The ignoreeof option should prevent an interactive shell from exiting on EOF. This hasn't worked in BusyBox ash since commit 727752d2d (ash: better fix for ash -c 'echo 5&' and ash -c 'sleep 5&' with testcase). Commit 3b4d04b77e (ash: input: Allow two consecutive calls to pungetc) pulled in improved support for multiple calls to pungetc from dash, thus rendering much of commit 727752d2d obsolete. Removing this old code fixes the problem with ignoreeof. function old new delta __pgetc 605 587 -18 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-18) Total: -18 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-09ash: eval: Prevent recursive PS4 expansionDenys Vlasenko
Date: Wed, 27 May 2020 13:19:10 +1000 eval: Prevent recursive PS4 expansion Yaroslav Halchenko <yoh@onerussian.com> wrote: > I like to (ab)use PS4 and set -x for tracing execution of scripts. > Reporting time and PID is very useful in this context. > > I am not 100% certain if bash's behavior (of actually running the command > embedded within PS4 string, probably eval'ing it) is actually POSIX > compliant, posh seems to not do that; but I think it is definitely not > desired for dash to just stall: > > - the script: > #!/bin/sh > set -x > export PS4='+ $(date +%T.%N) [$$] ' > echo "lets go" > sleep 1 > echo "done $var" > > - bash: > /tmp > bash --posix test.sh > +export 'PS4=+ $(date +%T.%N) [$$] ' > +PS4='+ $(date +%T.%N) [$$] ' > + 09:15:48.982296333 [2764323] echo 'lets go' > lets go > + 09:15:48.987829613 [2764323] sleep 1 > + 09:15:49.994485037 [2764323] echo 'done ' > done > ... > - dash: (stalls it set -x) > /tmp > dash test.sh > +export PS4=+ $(date +%T.%N) [$$] > ^C^C This patch fixes the infinite loop caused by repeated expansions of PS4. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-08ash: parser: Get rid of PEOADenys Vlasenko
Upstream commit: Date: Wed, 27 May 2020 12:19:13 +1000 parser: Get rid of PEOA PEOA is a special character used to mark an alias as being finished so that we don't enter an infinite loop with nested aliases. It complicates the parser because we have to ensure that it is skipped where necessary and not copied to the resulting token text. This patch removes it and instead delays the marking of aliases until the second pgetc. This has the same effect as the current PEOA code while keeping the complexities within the input code. This adds ~32 bytes of global data: function old new delta __pgetc - 512 +512 freestrings - 95 +95 popfile 86 110 +24 pushstring 141 160 +19 basepf 76 84 +8 syntax_index_table 258 257 -1 S_I_T 30 28 -2 .rodata 104255 104247 -8 pgetc_without_PEOA 13 - -13 xxreadtoken 230 215 -15 popstring 158 120 -38 readtoken1 3110 3045 -65 pgetc 547 22 -525 ------------------------------------------------------------------------------ (add/remove: 2/1 grow/shrink: 3/7 up/down: 658/-667) Total: -9 bytes text data bss dec hex filename 1043102 559 5020 1048681 100069 busybox_old 1043085 559 5052 1048696 100078 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-08ash: parser: Fix alias expansion after heredoc or newlinesDenys Vlasenko
Upstream commit: Date: Wed, 29 Apr 2020 00:19:59 +1000 parser: Fix alias expansion after heredoc or newlines This script should print OK: alias a="case x in " b=x a b) echo BAD;; esac alias BEGIN={ END=} BEGIN cat <<- EOF > /dev/null $(:) EOF END : <<- EOF && $(:) EOF BEGIN echo OK END However, because the value of checkkwd is either zeroed when it shouldn't, or isn't zeroed when it should, dash currently gets it wrong in every case. This patch fixes it by saving checkkwd and zeroing it where needed. function old new delta readtoken 157 176 +19 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-08ash: use pgetc_eatbnl() in more places, take 3Denys Vlasenko
Adding previously skipped "readtoken1(pgetc_eatbnl(), syntax_type..." change from upstream commit: Date: Thu Mar 8 08:37:11 2018 +0100 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. Testcase: PS1='\ :::' should result in ::: prompt, not <newline>::: prompt Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-08ash: parser: Save and restore heredoclist in expandstrDenys Vlasenko
Upstream commit: Date: Sun, 17 May 2020 23:36:25 +1000 parser: Save and restore heredoclist in expandstr On Sun, May 17, 2020 at 01:19:28PM +0100, Harald van Dijk wrote: > This still does not restore the state completely. It does not clean up any > pending heredocs. I see: > > $ PS1='$(<<EOF "' > src/dash: 1: Syntax error: Unterminated quoted string > $(<<EOF ": > > > > That is, after entering the ':' command, the shell is still trying to read > the heredoc from the prompt. This patch saves and restores the heredoclist in expandstr. It also removes a bunch of unnecessary volatiles as those variables are only referenced in case of a longjmp other than one started by a signal like SIGINT. function old new delta expandstr 268 255 -13 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-08ash: parser: Fix handling of empty aliasesDenys Vlasenko
Upstream commit: Date: Tue, 28 Apr 2020 01:15:26 +1000 parser: Fix handling of empty aliases Dash was incorrectly handling empty aliases. When attempting to use an empty alias with nothing else, I'm (incorrectly) prompted for more input: ``` $ alias empty='' $ empty > ``` Other shells (e.g., bash, yash) correctly handle the lone, empty alias as an empty command: ``` $ alias empty='' $ empty $ ``` The problem here is that we incorrectly enter the loop eating TNLs in readtoken(). This patch fixes it by setting checkkwd correctly. function old new delta list 351 355 +4 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07hush: fix var_LINENO3.tests failureDenys Vlasenko
function old new delta parse_and_run_string 40 62 +22 i_getch 105 102 -3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 22/-3) Total: 19 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07shell/ash_test/run-all: unset locale/language variablesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07ash: LINENO starts from 0 in -c SCRIPT modeDenys Vlasenko
The var_LINENO3.tests fails for hush: it does start from 0, but does not increment. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07ash: fix LINENO in functionsDenys Vlasenko
From larger patch by Roberto A. Foglietta <roberto.foglietta@gmail.com> function old new delta evalfun 348 369 +21 ash_main 1202 1218 +16 setinputstring 65 73 +8 lookupvar 116 106 -10 evaltree 772 753 -19 evalsubshell 192 173 -19 evalfor 175 156 -19 evalcase 273 254 -19 evalcommand 1560 1536 -24 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/6 up/down: 45/-110) Total: -65 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07ash: support testsuite for !FEATURE_SUID_CONFIG_QUIET configsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07hush: fix set -n to act immediately, not just after run_list()Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07ash: eval: Do not cache value of eflag in evaltreeDenys Vlasenko
Upsteam commit: Date: Mon, 17 May 2021 15:19:23 +0800 eval: Do not cache value of eflag in evaltree Patrick Brünn <P.Bruenn@beckhoff.com> wrote: > Since we are migrating to Debian bullseye, we discovered a new behavior > with our scripts, which look like this: >>cleanup() { >> set +e >> rmdir "" >>} >>set -eu >>trap 'cleanup' EXIT INT TERM >>echo 'Hello world!' > > With old dash v0.5.10.2 this script would return 0 as we expected it. > But since commit 62cf6955f8abe875752d7163f6f3adbc7e49ebae it returns > the last exit code of our cleanup function. ... Thanks for the report. This is actually a fairly old bug with set -e that's just been exposed by the exit status change. What's really happening is that cleanup itself is triggering a set -e exit incorrectly because evaltree cached the value of eflag prior to the function call. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07ash: eval: Check nflag in evaltree instead of cmdloopDenys Vlasenko
Upstream commit: Date: Thu, 4 Jun 2020 21:53:55 +1000 eval: Check nflag in evaltree instead of cmdloop This patch moves the nflag check from cmdloop into evaltree. This is so that nflag will be in force even if we enter the shell via a path other than cmdloop, e.g., through sh -c. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-07ash: add bash-like ERR trap and set -ERoberto A. Foglietta
While at it, stop incrementing LINENO inside traps function old new delta evaltree 567 762 +195 evalfun 268 348 +80 trapcmd 286 333 +47 dotrap 129 157 +28 exitshell 120 139 +19 readtoken1 3096 3110 +14 nlprompt 25 39 +14 nlnoprompt 19 33 +14 .rodata 104245 104255 +10 forkchild 610 617 +7 optletters_optnames 64 68 +4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 11/0 up/down: 432/0) Total: 432 bytes Signed-off-by: Roberto A. Foglietta <roberto.foglietta@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-09-02ash: regressions in process substitutionRon Yorston
Stacy Harper reports that this script: test() { . /tmp/bb_test; } echo "export TEST=foo" >/tmp/bb_test test 2>/dev/null echo "$TEST" correctly prints 'foo' in BusyBox 1.33 but hangs in 1.34. Bisection suggested the problem was caused by commit a1b0d3856 (ash: add process substitution in bash-compatibility mode). Removing the call to unwindredir() in cmdloop() introduced in that commit makes the script work again. Additionally, these examples of process substitution: while true; do cat <(echo hi); done f() { while true; do cat <(echo hi); done } f result in running out of file descriptors. This is a regression from v5 of the process substitution patch caused by changes to evalcommand() not being transferred to v6. function old new delta static.pushredir - 99 +99 evalcommand 1729 1750 +21 exitreset 69 86 +17 cmdloop 372 365 -7 unwindredir 28 - -28 pushredir 112 - -112 ------------------------------------------------------------------------------ (add/remove: 1/2 grow/shrink: 2/1 up/down: 137/-147) Total: -10 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-08-15hush: fix "error: invalid preprocessing directive ##"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-27hush: tweak ${var/pattern/repl} optimizationDenys Vlasenko
function old new delta expand_one_var 2507 2502 -5 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2021-07-27hush: optimize ${var/pattern/repl} for trivial patternsDenys Vlasenko
function old new delta expand_one_var 2353 2507 +154 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
generated by cgit v1.1 at 2024-12-27 22:40:43 +0000