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~180 differences between GNU coreutils and uutils, found by AI fuzzer

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@emirmrkaljevic is already working on this.

Since Oct 17, 2026.

  • #15455 by @emirmrkaljevic — open

Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
20/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Active
Tech stack
rust
Domain
cli

Research direction

Start with the attached issue_tester.zip and results.html, then run just repro to reproduce the reported differences between GNU coreutils 9.7 and uutils. The report spans many commands and behaviors, so identify a specific failing case and its corresponding code and tests before assessing scope. Done means the selected case matches GNU's reported output, exit status, and file effects.

Written by the indexing model from the issue text.

Description

I set up a dedicated container image where an AI could experiment freely with all kinds of options and flag combinations, without me worrying that it might break something important. It built a differential fuzzer that runs GNU coreutils 9.12 and uutils side by side and compares stdout, stderr, exit status and the resulting files.

just repro on project below, runs all the tests on found items to verify its current state.

fuzzer - fuzzer.zip
results in a html format - report.zip

Everything below this line was written entirely by AI.

//////////////////////////////////////////////////////////////

  • GNU coreutils: ls (GNU coreutils) 9.12
  • uutils (upstream main, release build): 7ecdfad 2026-10-12 chore(deps): update rust crate zip to v9.0.2
  • Every command ran with LC_ALL=C, TZ=UTC and stdin redirected from a regular file (stdin.txt)
GNU coreutils 9.12 vs uutils(only some part of differences)
Kind Command Difference
accepted/rejected chmod --de -R --no-d -P 644 a.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: chmod: -R --dereference requires -H or -L
accepted/rejected comm --check-order --no a.txt b.txt exit GNU 0, uutils 1
stdout
GNU: →apple 10
→→banana 3
+11 lines
uutils: empty
stderr
GNU: empty
uutils: error: the argument '--check-order' cannot be used with '--nocheck-order'
For more information, try '--help'.
accepted/rejected cp --attributes-only link copy.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: cp: cannot change attribute 'copy.txt': Source file is a non regular file
files
GNU: f 0644 0 150c532c copy.txt
uutils: empty
accepted/rejected cp --backup= a.txt copy.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: cp: cp: ambiguous argument '' for 'backup type'
Valid arguments are:
+5 lines
files
GNU: f 0644 82 0a3117cd copy.txt
uutils: empty
accepted/rejected cp --no-preserve a a.txt copy.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: cp: target: 'copy.txt' is not a directory
files
GNU: f 0644 82 0a3117cd copy.txt
uutils: empty
accepted/rejected cp --pr a.txt copy.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: error: unexpected argument '--pr' found
tip: a similar argument exists: '--sparse'
+4 lines
files
GNU: f 0644 82 0a3117cd copy.txt
uutils: empty
accepted/rejected cp --reflink --cop a.txt copy.txt exit GNU 1, uutils 0
stderr
GNU: cp: failed to clone 'copy.txt' from 'a.txt': Operation not supported
uutils: empty
files
GNU: empty
uutils: f 0644 82 0a3117cd copy.txt
accepted/rejected cp --symbolic-link -l a.txt copy.txt exit GNU 1, uutils 0
stderr
GNU: cp: cannot make both hard and symbolic links
Try 'cp --help' for more information.
uutils: empty
files
GNU: empty
uutils: f 0644 82 0a3117cd copy.txt
accepted/rejected cp -l --reflink a.txt copy.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: cp: 'a.txt' -> 'copy.txt': Operation not supported
files
GNU: f 0644 82 0a3117cd copy.txt
uutils: empty
accepted/rejected cp -s b.txt sub exit GNU 1, uutils 0
stderr
GNU: cp: sub/b.txt: can make relative symbolic links only in current directory
uutils: empty
files
GNU: empty
uutils: l 0777 0 - sub/b.txt -> b.txt
accepted/rejected df --block-size=0 -k exit GNU 1, uutils 0
stdout
GNU: empty
uutils: Filesystem 1K-blocks Used Available Use% Mounted on
overlay 960201752 834381560 76970888 92% /
+11 lines
stderr
GNU: df: invalid --block-size argument '0'
uutils: empty
accepted/rejected dircolors -b - exit GNU 0, uutils 1
stdout
GNU: LS_COLORS='';
export LS_COLORS
uutils: empty
stderr
GNU: empty
uutils: dircolors: unrecognized keyword from
accepted/rejected du --dereference-args -P dangling exit GNU 0, uutils 1
stdout
GNU: 0→dangling
uutils: empty
stderr
GNU: empty
uutils: du: cannot access 'dangling': No such file or directory
accepted/rejected du -X - exit GNU 0, uutils 1
stdout
GNU: 4→./sub/deep
12→./sub
+1 lines
uutils: empty
stderr
GNU: empty
uutils: du: No such file or directory
accepted/rejected du -d 0x10 exit GNU 0, uutils 1
stdout
GNU: 4→./sub/deep
12→./sub
+1 lines
uutils: empty
stderr
GNU: empty
uutils: du: invalid maximum depth '0x10'
Try 'du du --help' for more information.
accepted/rejected env --sp=1 exit GNU 127, uutils 0
stdout
GNU: empty
uutils: COLUMNS=80
HOME=/home/rafal/Projekt​y/Obce/coreutils/tmp/fla​gdiff/work/sandbox/run-7​-1791806065622117992/slo​t0/box
+4 lines
stderr
GNU: env: '1': No such file or directory
uutils: empty
accepted/rejected env --unset= - exit GNU 0, uutils 125
stderr
GNU: empty
uutils: env: cannot unset '': Invalid argument
accepted/rejected env -a9223372036854775807 exit GNU 125, uutils 0
stdout
GNU: empty
uutils: COLUMNS=80
HOME=/home/rafal/Projekt​y/Obce/coreutils/tmp/fla​gdiff/work/sandbox/run-7​-1791806065622117992/slo​t13/box
+4 lines
stderr
GNU: env: must specify command with --argv0 (-a)
Try 'env --help' for more information.
uutils: empty
accepted/rejected fmt --pr=1 exit GNU 0, uutils 1
stdout
GNU: from stdin
line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '--pr' found
tip: a similar argument exists: '--prefix'
+2 lines
accepted/rejected fmt --ta exit GNU 0, uutils 1
stdout
GNU: from stdin
line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '--ta' found
tip: a similar argument exists: '--tab-width'
+2 lines
accepted/rejected fold --bytes --ch exit GNU 0, uutils 1
stdout
GNU: from stdin
line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: the argument '--bytes' cannot be used with '--characters'
For more information, try '--help'.
accepted/rejected head -c1-3 --lines=1 exit GNU 1, uutils 0
stdout
GNU: empty
uutils: from stdin
stderr
GNU: head: invalid number of bytes: '1-3'
uutils: empty
accepted/rejected install --backup= a.txt newfile exit GNU 0, uutils 1
stderr
GNU: empty
uutils: install: ambiguous argument '' for 'backup type'
Valid arguments are:
+5 lines
files
GNU: f 0755 82 0a3117cd newfile
uutils: empty
accepted/rejected install --context a.txt newfile exit GNU 0, uutils 1
stderr
GNU: empty
uutils: install: missing destination file operand after 'newfile'
Try 'install install --help' for more information.
files
GNU: f 0755 82 0a3117cd newfile
uutils: empty
accepted/rejected install --di -t1 newdir exit GNU 1, uutils 0
stderr
GNU: install: target directory not allowed when installing a directory
uutils: empty
files
GNU: empty
uutils: d 0755 0 - newdir
accepted/rejected install --mo=1 --preserve-timestamps a.txt newfile exit GNU 0, uutils 1
stderr
GNU: empty
uutils: install: Permission denied
accepted/rejected install -d -s newdir exit GNU 1, uutils 0
stderr
GNU: install: the strip option may not be used when installing a directory
uutils: empty
files
GNU: empty
uutils: d 0755 0 - newdir
accepted/rejected install -m -1 a.txt newfile exit GNU 0, uutils 1
stderr
GNU: empty
uutils: error: unexpected argument '-1' found
tip: to pass '-1' as a value, use '-- -1'
+2 lines
files
GNU: f 0000 82 150c532c newfile
uutils: empty
accepted/rejected join --ch -t2 -j 2 a.txt b.txt exit GNU 0, uutils 1
stdout
GNU: 2banana 3
uutils: 2banana 32
+2 more differing parts in stdout
stderr
GNU: empty
uutils: join: a.txt:4: is not sorted: apple 10
accepted/rejected join --check-order --nocheck-order a.txt b.txt exit GNU 0, uutils 1
stdout
GNU: banana 3 3
uutils: empty
stderr
GNU: empty
uutils: join: a.txt:2: is not sorted: apple 10
accepted/rejected ln --backup= a.txt newlink exit GNU 0, uutils 1
stderr
GNU: empty
uutils: ln: ambiguous argument '' for 'backup type'
Valid arguments are:
+5 lines
files
GNU: f 0644 82 0a3117cd newlink
uutils: empty
accepted/rejected ls --bl 0 --si exit GNU 2, uutils 0
stdout
GNU: empty
uutils: a.txt
b.txt
+13 lines
stderr
GNU: ls: invalid --block-size argument '0'
uutils: empty
accepted/rejected ls --block-size=0 --human-readable exit GNU 2, uutils 0
stdout
GNU: empty
uutils: a.txt
b.txt
+13 lines
stderr
GNU: ls: invalid --block-size argument '0'
uutils: empty
accepted/rejected ls --group-directories-firs​t -L exit GNU 1, uutils 0
stderr
GNU: ls: cannot access 'dangling': No such file or directory
uutils: empty
accepted/rejected mkdir --context newdir exit GNU 0, uutils 1
stderr
GNU: empty
uutils: error: the following required arguments were not provided:
<dirs>...
+2 lines
files
GNU: d 0755 0 - newdir
uutils: empty
accepted/rejected mkdir -m 1,2 newdir exit GNU 1, uutils 0
stderr
GNU: mkdir: invalid mode '1,2'
uutils: empty
files
GNU: empty
uutils: d 0002 0 - newdir
accepted/rejected mkfifo -m -1 fifo exit GNU 0, uutils 1
stderr
GNU: empty
uutils: error: unexpected argument '-1' found
tip: to pass '-1' as a value, use '-- -1'
+2 lines
files
GNU: o 0666 0 - fifo
uutils: empty
accepted/rejected mv --backup= b.txt moved.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: mv: ambiguous argument '' for 'backup type'
Valid arguments are:
+5 lines
files
GNU: f 0644 38 5949bba7 moved.txt
uutils: f 0644 38 5949bba7 b.txt
accepted/rejected mv --no-c b.txt moved.txt exit GNU 1, uutils 0
stderr
GNU: mv: option '--no-c' is ambiguous; possibilities: '--no-clobber' '--no-copy'
Try 'mv --help' for more information.
uutils: empty
files
GNU: f 0644 38 5949bba7 b.txt
uutils: f 0644 38 5949bba7 moved.txt
accepted/rejected mv --update=none -u -S 9223372036854775807 sub newdir exit GNU 0, uutils 1
stderr
GNU: empty
uutils: mv: cannot combine --backup with -n/--no-clobber or --update=none-fail
Try 'mv mv --help' for more information.
files
GNU: d 0755 0 - newdir
f 0644 7 8febb964 newdir/.hidden
+3 lines
uutils: d 0755 0 - sub
f 0644 7 8febb964 sub/.hidden
+3 lines
accepted/rejected nl -b a.txt exit GNU 0, uutils 1
stdout
GNU: 1→from stdin
2→line two
+2 lines
uutils: empty
stderr
GNU: empty
uutils: nl: Invalid arguments supplied.
invalid numbering style: 'a.txt'
accepted/rejected nl -f a.txt exit GNU 0, uutils 1
stdout
GNU: 1→from stdin
2→line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: nl: Invalid arguments supplied.
invalid numbering style: 'a.txt'
accepted/rejected nl -h a.txt exit GNU 0, uutils 1
stdout
GNU: 1→from stdin
2→line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: nl: Invalid arguments supplied.
invalid numbering style: 'a.txt'
accepted/rejected nl -i -1 exit GNU 0, uutils 1
stdout
GNU: 1→from stdin
0→line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-1' found
tip: to pass '-1' as a value, use '-- -1'
+2 lines
accepted/rejected nl -v -1 exit GNU 0, uutils 1
stdout
GNU: -1→from stdin
0→line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-1' found
tip: to pass '-1' as a value, use '-- -1'
+2 lines
accepted/rejected numfmt --from-unit=+5 5678 exit GNU 0, uutils 1
stdout
GNU: 28390
uutils: empty
stderr
GNU: empty
uutils: numfmt: invalid unit size: '+5'
accepted/rejected numfmt --from=a 5678 exit GNU 0, uutils 1
stdout
GNU: 5678
uutils: empty
stderr
GNU: empty
uutils: numfmt: invalid argument 'a' for '--from'
accepted/rejected numfmt --invalid=a 5678 exit GNU 0, uutils 1
stdout
GNU: 5678
uutils: empty
stderr
GNU: empty
uutils: error: invalid value 'a' for '--invalid <INVALID>'
[possible values: abort, fail, warn, ignore]
+1 lines
accepted/rejected od --fo=1 exit GNU 1, uutils 0
stdout
GNU: empty
uutils: 0000000 071146 066557 071440 062164 067151 066012 067151 020145
0000020 073564 005157 066012 067151 020145 067546 071165 000012
+1 lines
stderr
GNU: od: invalid character '1' in type string '1'
uutils: empty
accepted/rejected od --st=0x10 -c exit GNU 1, uutils 0
stderr
GNU: od: no type may be specified when dumping strings
uutils: empty
accepted/rejected od --st=1 -b exit GNU 1, uutils 0
stderr
GNU: od: no type may be specified when dumping strings
uutils: empty
accepted/rejected od --st=1 -d exit GNU 1, uutils 0
stderr
GNU: od: no type may be specified when dumping strings
uutils: empty
accepted/rejected od --st=1 -i exit GNU 1, uutils 0
stderr
GNU: od: no type may be specified when dumping strings
uutils: empty
accepted/rejected od --strings b.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: od: invalid --strings argument 'b.txt'
accepted/rejected od --strings=0x10 -x exit GNU 1, uutils 0
stderr
GNU: od: no type may be specified when dumping strings
uutils: empty
accepted/rejected od --strings=2 -o exit GNU 1, uutils 0
stderr
GNU: od: no type may be specified when dumping strings
uutils: empty
accepted/rejected od --strings=2 -s exit GNU 1, uutils 0
stderr
GNU: od: no type may be specified when dumping strings
uutils: empty
accepted/rejected od -j +5 #12604 exit GNU 0, uutils 1
stdout
GNU: 0000005 072163 064544 005156 064554 062556 072040 067567 005012
0000025 064554 062556 063040 072557 005162
+1 lines
uutils: empty
stderr
GNU: empty
uutils: od: invalid -j argument '+5'
accepted/rejected od -l --st=0x10 exit GNU 1, uutils 0
stderr
GNU: od: no type may be specified when dumping strings
uutils: empty
accepted/rejected pathchk 'sp ace.txt' --po exit GNU 0, uutils 1
stderr
GNU: empty
uutils: pathchk: nonportable character ' ' in file name component 'sp ace.txt'
accepted/rejected pathchk 'sp ace.txt' -p exit GNU 0, uutils 1
stderr
GNU: empty
uutils: pathchk: nonportable character ' ' in file name component 'sp ace.txt'
accepted/rejected pr --merge -2 exit GNU 1, uutils 0
stdout
GNU: empty
uutils: 2026-10-12 11:54 Page 1
from stdin
+2 lines
stderr
GNU: pr: cannot specify number of columns when printing in parallel
uutils: empty
accepted/rejected pr -2D 18446744073709551615 exit GNU 0, uutils 1
stdout
GNU: 18446744073709551615 Page 1
from stdin→→→
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-2' found
tip: to pass '-2' as a value, use '-- -2'
+2 lines
accepted/rejected pr -2J exit GNU 0, uutils 1
stdout
GNU: 2026-10-12 11:55 Page 1
from stdin→
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-2' found
tip: to pass '-2' as a value, use '-- -2'
+2 lines
accepted/rejected pr -2a exit GNU 0, uutils 1
stdout
GNU: 2026-10-12 11:55 Page 1
from stdin→→→ line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-2' found
tip: to pass '-2' as a value, use '-- -2'
+2 lines
accepted/rejected pr -2f exit GNU 0, uutils 1
stdout
GNU: 2026-10-12 11:54 Page 1
from stdin→→→
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-2' found
tip: to pass '-2' as a value, use '-- -2'
+2 lines
accepted/rejected pr -2h 18446744073709551615 exit GNU 0, uutils 1
stdout
GNU: 2026-10-12 12:01 18446744073709551615 Page 1
from stdin→→→
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-2' found
tip: to pass '-2' as a value, use '-- -2'
+2 lines
accepted/rejected pr -N -1 exit GNU 0, uutils 1
stdout
GNU: 2026-10-12 11:54 Page 1
from stdin
+2 lines
uutils: empty
stderr
GNU: empty
uutils: error: a value is required for '--first-line-number <NUMBER>' but none was supplied
For more information, try '--help'.
accepted/rejected pr -T2 exit GNU 0, uutils 1
stdout
GNU: from stdin→→→
line two→→→ line four
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-2' found
tip: to pass '-2' as a value, use '-- -2'
+2 lines
accepted/rejected pr -W +5 exit GNU 0, uutils 1
stdout
GNU: 2026-10-12 11:54 Page 1
from
+2 lines
uutils: empty
stderr
GNU: empty
uutils: error: a value is required for '--page-width <width>' but none was supplied
For more information, try '--help'.
accepted/rejected pr -l +5 exit GNU 0, uutils 1
stdout
GNU: from stdin
line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: a value is required for '--length <PAGE_LENGTH>' but none was supplied
For more information, try '--help'.
accepted/rejected pr -o +5 exit GNU 0, uutils 1
stdout
GNU: 2026-10-12 11:54 Page 1
from stdin
+2 lines
uutils: empty
stderr
GNU: empty
uutils: error: a value is required for '--indent <margin>' but none was supplied
For more information, try '--help'.
accepted/rejected pr -r2 exit GNU 0, uutils 1
stdout
GNU: 2026-10-12 11:55 Page 1
from stdin→→→
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-2' found
tip: to pass '-2' as a value, use '-- -2'
+2 lines
accepted/rejected pr -t2 exit GNU 0, uutils 1
stdout
GNU: from stdin→→→
line two→→→ line four
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '-2' found
tip: to pass '-2' as a value, use '-- -2'
+2 lines
accepted/rejected ptx -G exit GNU 1, uutils 0
stdout
GNU: empty
uutils: .xx "" "line" "four" ""
.xx "" "" "from stdin" ""
+4 lines
stderr
GNU: ptx: error: regular expression has a match of length zero: '\n'
uutils: empty
accepted/rejected ptx -S a b.txt exit GNU 1, uutils 0
stdout
GNU: empty
uutils: te 7 Elder berry/
pple 10 b
+6 lines
stderr
GNU: ptx: error: regular expression has a match of length zero: 'a'
uutils: empty
accepted/rejected ptx -b '' exit GNU 0, uutils 1
stderr
GNU: empty
uutils: ptx: : No such file or directory
accepted/rejected ptx -g 0x10 exit GNU 0, uutils 1
stdout
GNU: line two line four from stdin
from stdin line two line four
+4 lines
uutils: empty
stderr
GNU: empty
uutils: error: invalid value '0x10' for '--gap-size <NUMBER>': invalid digit found in string
For more information, try '--help'.
accepted/rejected ptx -i '' exit GNU 0, uutils 1
stderr
GNU: empty
uutils: ptx: : No such file or directory
accepted/rejected ptx -o '' exit GNU 0, uutils 1
stderr
GNU: empty
uutils: ptx: : No such file or directory
accepted/rejected ptx -r exit GNU 1, uutils 0
stdout
GNU: empty
uutils: line four
from stdin
+1 lines
stderr
GNU: ptx: error: regular expression has a match of length zero: '\n'
uutils: empty
accepted/rejected ptx -w 0x10 exit GNU 0, uutils 1
stdout
GNU: / four
from/
+4 lines
uutils: empty
stderr
GNU: empty
uutils: error: invalid value '0x10' for '--width <NUMBER>': invalid digit found in string
For more information, try '--help'.
accepted/rejected readlink --canonicalize-e --canonicalize-m .hidden exit GNU 0, uutils 1
stdout
GNU: /home/rafal/Projekty/Obc​e/coreutils/tmp/flagdiff​/work/sandbox/run-7-1791​806065622117992/slot3/bo​x/.hidden
uutils: empty
accepted/rejected readlink -e --canonicalize dangling exit GNU 0, uutils 1
stdout
GNU: /home/rafal/Projekty/Obc​e/coreutils/tmp/flagdiff​/work/sandbox/run-7-1791​806065622117992/slot9/bo​x/missing
uutils: empty
accepted/rejected realpath --no -e dangling exit GNU 1, uutils 0
stdout
GNU: empty
uutils: /home/rafal/Projekty/Obc​e/coreutils/tmp/flagdiff​/work/sandbox/run-7-1791​806065622117992/slot9/bo​x/dangling
stderr
GNU: realpath: dangling: No such file or directory
uutils: empty
accepted/rejected rm --dir -i sub exit GNU 1, uutils 0
stderr
GNU: rm: cannot remove 'sub': Is a directory
uutils: rm: remove directory 'sub'? (no newline)
accepted/rejected rm --fo -I exit GNU 1, uutils 0
stderr
GNU: rm: missing operand
Try 'rm --help' for more information.
uutils: empty
accepted/rejected rm --interactive=always --dir sub exit GNU 1, uutils 0
stderr
GNU: rm: cannot remove 'sub': Is a directory
uutils: rm: remove directory 'sub'? (no newline)
accepted/rejected rm --pr empty.txt exit GNU 0, uutils 1
stderr
GNU: empty
uutils: error: unexpected argument '--pr' found
tip: a similar argument exists: '--progress'
+2 lines
files
GNU: empty
uutils: f 0644 0 150c532c empty.txt
accepted/rejected rm -f --interactive=a exit GNU 1, uutils 0
stderr
GNU: rm: missing operand
Try 'rm --help' for more information.
uutils: empty
accepted/rejected rm -f -i exit GNU 1, uutils 0
stderr
GNU: rm: missing operand
Try 'rm --help' for more information.
uutils: empty
accepted/rejected shuf --ra=a.txt exit GNU 0, uutils 1
stdout
GNU: line two
from stdin
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: unexpected argument '--ra' found
tip: a similar argument exists: '--random-seed'
+4 lines
accepted/rejected sort +1 --human-numeric-sort --random-sor exit GNU 2, uutils 0
stdout
GNU: empty
uutils: from stdin
line four
+1 lines
stderr
GNU: sort: options '-hR' are incompatible
uutils: empty
accepted/rejected sort --batch-size +5 exit GNU 0, uutils 1
stdout
GNU: from stdin
line four
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: a value is required for '--batch-size <N_MERGE>' but none was supplied
For more information, try '--help'.
accepted/rejected sort --hu -g +1 -2 exit GNU 2, uutils 0
stdout
GNU: empty
uutils: from stdin
line four
+1 lines
stderr
GNU: sort: options '-gh' are incompatible
uutils: empty
accepted/rejected sort --ke 18446744073709551615 --general-numeric-sort -M exit GNU 2, uutils 0
stdout
GNU: empty
uutils: from stdin
line four
+1 lines
stderr
GNU: sort: options '-gM' are incompatible
uutils: empty
accepted/rejected sort --mo --version- --ke=1 exit GNU 2, uutils 0
stdout
GNU: empty
uutils: from stdin
line four
+1 lines
stderr
GNU: sort: options '-MV' are incompatible
uutils: empty
accepted/rejected sort --month-sort -k 2 --hu exit GNU 2, uutils 0
stdout
GNU: empty
uutils: from stdin
line four
+1 lines
stderr
GNU: sort: options '-hM' are incompatible
uutils: empty
accepted/rejected sort --nu --version- --key 18446744073709551615 exit GNU 2, uutils 0
stdout
GNU: empty
uutils: from stdin
line four
+1 lines
stderr
GNU: sort: options '-nV' are incompatible
uutils: empty
accepted/rejected sort --ou 1 --de exit GNU 2, uutils 0
stderr
GNU: sort: options '-o --debug' are incompatible
uutils: sort: text ordering performed using simple byte comparison
files
GNU: empty
uutils: f 0644 80 7eb904ca 1
accepted/rejected sort --parallel +5 #15183 exit GNU 0, uutils 1
stdout
GNU: from stdin
line four
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: a value is required for '--parallel <NUM_THREADS>' but none was supplied
For more information, try '--help'.
accepted/rejected sort --random-sor -k 1 --numeric-sort exit GNU 2, uutils 0
stdout
GNU: empty
uutils: from stdin
line four
+1 lines
stderr
GNU: sort: options '-nR' are incompatible
uutils: empty
accepted/rejected sort --version-sort +1 -2 --mo exit GNU 2, uutils 0
stdout
GNU: empty
uutils: from stdin
line four
+1 lines
stderr
GNU: sort: options '-MV' are incompatible
uutils: empty
accepted/rejected sort -R --random-sou 18446744073709551615 +0 -1V exit GNU 0, uutils 2
stdout
GNU: from stdin
line four
+1 lines
uutils: empty
stderr
GNU: empty
uutils: sort: open failed: 18446744073709551615: No such file or directory
accepted/rejected sort -S +5 exit GNU 0, uutils 1
stdout
GNU: from stdin
line four
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: a value is required for '--buffer-size <SIZE>' but none was supplied
For more information, try '--help'.
accepted/rejected split --hex-suffixes= #13749 exit GNU 0, uutils 1
stderr
GNU: empty
uutils: split: invalid suffix length: ''
files
GNU: f 0644 31 31ed1b75 x00
uutils: empty
accepted/rejected split --hex-suffixes=1,2 -x #13749 exit GNU 1, uutils 0
stderr
GNU: split: '1,2': invalid start value for hexadecimal suffix
Try 'split --help' for more information.
uutils: empty
files
GNU: empty
uutils: f 0644 31 31ed1b75 x00
accepted/rejected split --hex=1-3 --nume #13749 exit GNU 1, uutils 0
stderr
GNU: split: '1-3': invalid start value for hexadecimal suffix
Try 'split --help' for more information.
uutils: empty
files
GNU: empty
uutils: f 0644 31 31ed1b75 x00
accepted/rejected split --numeric-suffixes= #13749 exit GNU 0, uutils 1
stderr
GNU: empty
uutils: split: invalid suffix length: ''
files
GNU: f 0644 31 31ed1b75 x00
uutils: empty
accepted/rejected split -n +5 exit GNU 0, uutils 1
stderr
GNU: empty
uutils: split: invalid number of chunks: '+5'
files
GNU: f 0644 7 ed99ed2d xaa
f 0644 6 a1f57ac2 xab
+3 lines
uutils: empty
accepted/rejected tail --bytes 1,2 --lines 2 exit GNU 1, uutils 0
stdout
GNU: empty
uutils: line four
stderr
GNU: tail: invalid number of bytes: '1,2'
uutils: empty
accepted/rejected tail --max-unchanged-stats=18​446744073709551615 exit GNU 0, uutils 1
stdout
GNU: from stdin
line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: tail: invalid maximum number of unchanged stats between opens: '18446744073709551615'
Try 'tail tail --help' for more information.
accepted/rejected truncate --no-create --io-blocks --si=9223372036854775807 - exit GNU 0, uutils 1
stderr
GNU: empty
uutils: truncate: overflow in 9223372036854775807 * 4096 byte blocks
accepted/rejected unexpand --first-only - exit GNU 0, uutils 1
stdout
GNU: from stdin
line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: error: the argument '--first-only' cannot be used multiple times
For more information, try '--help'.
accepted/rejected uniq +1 exit GNU 0, uutils 1
stdout
GNU: from stdin
line two
+1 lines
uutils: empty
stderr
GNU: empty
uutils: uniq: +1: No such file or directory
accepted/rejected uniq --all-repeated -1 exit GNU 0, uutils 1
stderr
GNU: empty
uutils: error: unexpected argument '-1' found
tip: to pass '-1' as a value, use '-- -1'
+2 lines
output/exit base32 --ignore-garbage --de binary.bin stdout
GNU: <U+FFFD><U+FFFD><U+FFFD> (no newline)
uutils: empty
stderr
GNU: base32: invalid input
uutils: base32: error: invalid input
output/exit base64 --decode stdout
GNU: ~<U+FFFD>& (no newline)
uutils: empty
stderr
GNU: base64: invalid input
uutils: base64: error: invalid input
output/exit basenc --base16 --decode a.txt stdout
GNU: <U+FFFD> (no newline)
uutils: empty
stderr
GNU: basenc: invalid input
uutils: basenc: error: invalid input
output/exit basenc --base16 -w 18446744073709551615 stdout
GNU: 66726F6D20737464696E0A6C​696E652074776F0A0A6C696E​6520666F75720A (no newline)
uutils: 66726F6D20737464696E0A6C​696E652074776F0A0A6C696E​6520666F75720A
output/exit basenc --base32 --wr 18446744073709551615 stdout
GNU: MZZG63JAON2GI2LOBJWGS3TF​EB2HO3YKBJWGS3TFEBTG65LS​BI====== (no newline)
uutils: MZZG63JAON2GI2LOBJWGS3TF​EB2HO3YKBJWGS3TFEBTG65LS​BI======
output/exit basenc --base32 -i --decode a.txt stdout
GNU: <U+07A7> (no newline)
uutils: empty
stderr
GNU: basenc: invalid input
uutils: basenc: error: invalid input
output/exit basenc --base64 -d stdout
GNU: ~<U+FFFD>& (no newline)
uutils: empty
stderr
GNU: basenc: invalid input
uutils: basenc: error: invalid input
output/exit basenc --base64 -w18446744073709551615 stdout
GNU: ZnJvbSBzdGRpbgpsaW5lIHR3​bwoKbGluZSBmb3VyCg== (no newline)
uutils: ZnJvbSBzdGRpbgpsaW5lIHR3​bwoKbGluZSBmb3VyCg==
output/exit basenc --base64u --decode stdout
GNU: ~<U+FFFD>& (no newline)
uutils: empty
stderr
GNU: basenc: invalid input
uutils: basenc: error: invalid input
output/exit basenc --z85 --decode a.txt stdout
GNU: "<U+FFFD><U+FFFD>e (no newline)
uutils: empty
stderr
GNU: basenc: invalid input
uutils: basenc: error: invalid input
output/exit basenc -w 18446744073709551615 --base5 stdout
GNU: 2Zc54v4ek5WUQgmcyf38jkbp​Km3dAQ1zvahCYhpuPWH (no newline)
uutils: 2Zc54v4ek5WUQgmcyf38jkbp​Km3dAQ1zvahCYhpuPWH
output/exit chmod --dereference -h +t link files
GNU: f 0644 82 0a3117cd a.txt
uutils: f 1644 82 0a3117cd a.txt
output/exit chmod --verbose 644 644 stdout
GNU: '644' could not be accessed
uutils: empty
output/exit chmod -P +t link files
GNU: f 1777 82 0a3117cd a.txt
uutils: f 1644 82 0a3117cd a.txt
output/exit cksum - stdout
GNU: 3206756708 31 -
uutils: 3206756708 31
output/exit comm --no --ch a.txt b.txt stdout
GNU: →apple 10
→→banana 3
uutils: empty
stderr
GNU: comm: file 1 is not in sorted order
uutils: error: the argument '--nocheck-order' cannot be used with '--check-order'
For more information, try '--help'.
output/exit comm --to --ch a.txt b.txt stdout
GNU: empty
uutils: 0→1→1→total
output/exit cp --at --remove-destination a.txt copy.txt files
GNU: f 0644 0 150c532c copy.txt
uutils: f 0644 82 0a3117cd copy.txt
output/exit cp --at --update=a a.txt copy.txt files
GNU: f 0644 0 150c532c copy.txt
uutils: f 0644 82 0a3117cd copy.txt
output/exit cp --at -u a.txt copy.txt files
GNU: f 0644 0 150c532c copy.txt
uutils: f 0644 82 0a3117cd copy.txt
output/exit cp --attributes-only --copy-contents a.txt copy.txt files
GNU: f 0644 0 150c532c copy.txt
uutils: f 0644 82 0a3117cd copy.txt
output/exit cp --attributes-only --ref=auto a.txt copy.txt files
GNU: f 0644 0 150c532c copy.txt
uutils: f 0644 82 0a3117cd copy.txt
output/exit date '-d ' -s1 stdout
GNU: empty
uutils: Mon Oct 12 01:00:00 UTC 2026
stderr
GNU: date: the options to print and set the time may not be used together
Try 'date --help' for more information.
uutils: date: cannot set date: Operation not permitted
output/exit date --file=2 --set=2 #14498 stdout
GNU: empty
uutils: Mon Oct 12 02:00:00 UTC 2026
stderr
GNU: date: the options to print and set the time may not be used together
Try 'date --help' for more information.
uutils: date: cannot set date: Operation not permitted
output/exit date --res --se 1 stdout
GNU: empty
uutils: 1791766800.000000000
stderr
GNU: date: the options to print and set the time may not be used together
Try 'date --help' for more information.
uutils: date: cannot set date: Operation not permitted
output/exit date -s2 --ref=.. stdout
GNU: empty
uutils: Mon Oct 12 02:00:00 UTC 2026
stderr
GNU: date: the options to print and set the time may not be used together
Try 'date --help' for more information.
uutils: date: cannot set date: Operation not permitted
output/exit dircolors --print-ls-colors stdout
GNU: empty
uutils: rs→0
di→01;34
+87 lines
output/exit dircolors -b stdout
GNU: LS_COLORS='';
uutils: LS_COLORS='rs=0:di=01;34​:ln=01;36:mh=00:pi=40;33​:so=01;35:do=01;35:bd=40​;33;01:cd=40;33;01:or=40​;31;01:mi=00:s...
output/exit dircolors -c stdout
GNU: setenv LS_COLORS ''
uutils: setenv LS_COLORS 'rs=0:di=01;34:ln=01;36:​mh=00:pi=40;33:so=01;35:​do=01;35:bd=40;33;01:cd=​40;33;01:or=40;31;01:...
output/exit dircolors -p stdout
GNU: # Copyright (C) 1996-2026 Free Software Foundation, Inc.
# Copying and distribution of this file, with or without modification,
+2 lines
uutils: empty
+6 more differing parts in stdout
output/exit du --exclude-from - a.txt missing.txt stdout
GNU: 4→a.txt
uutils: empty
stderr
GNU: du: cannot access 'missing.txt': No such file or directory
uutils: du: No such file or directory
output/exit du --ma 0x10 a.txt missing.txt stdout
GNU: 4→a.txt
uutils: empty
stderr
GNU: du: cannot access 'missing.txt': No such file or directory
uutils: du: invalid maximum depth '0x10'
Try 'du du --help' for more information.
output/exit du --separate-dirs --total stdout
GNU: 56→total
uutils: 44→total
output/exit du --total --time stdout
GNU: 56→2020-10-23 12:26→total
uutils: 56→total
output/exit env - --split-string= stdout
GNU: --split-string=
uutils: empty
output/exit env --default-signal #15187 stdout
GNU: empty
uutils: RUST_SIGPIPE=default
output/exit fmt --pr 9223372036854775807 b.txt missing.txt stdout
GNU: apple 10
banana 3
+2 lines
uutils: empty
stderr
GNU: fmt: cannot open 'missing.txt' for reading: No such file or directory
uutils: error: unexpected argument '--pr' found
tip: a similar argument exists: '--prefix'
+2 lines
output/exit fmt --ta 'sp ace.txt' sub stdout
GNU: file with space
second
uutils: empty
stderr
GNU: fmt: error reading 'sub': Is a directory
uutils: error: unexpected argument '--ta' found
tip: a similar argument exists: '--tab-width'
+2 lines
output/exit fmt -g 1 b.txt stdout
GNU: apple 10
uutils: apple
10
output/exit fmt binary.bin stdout
GNU: \00 (no newline)
uutils: \00
+1 more differing parts in stdout
output/exit fmt crlf.txt stdout
GNU: one<CR> (no newline)
two<CR> (no newline)
+1 lines
uutils: one two three
output/exit fold --wi 2 unicode.txt stdout
GNU: ż
ó
+2 lines
uutils: żó
łć
+2 more differing parts in stdout
output/exit fold -c -b 'sp ace.txt' sub stdout
GNU: file with space
second
uutils: empty
stderr
GNU: fold: sub: Is a directory
uutils: error: the argument '--characters' cannot be used with '--bytes'
For more information, try '--help'.
output/exit head --li 1-3 --bytes=2 b.txt missing.txt stdout
GNU: empty
uutils: ==> b.txt <==
ap (no newline)
stderr
GNU: head: invalid number of lines: '1-3'
uutils: head: cannot open 'missing.txt' for reading: No such file or directory
output/exit install --ba= --di a.txt newfile stderr
GNU: install: cannot create directory 'a.txt': File exists
uutils: install: ambiguous argument '' for 'backup type'
Valid arguments are:
+5 lines
files
GNU: d 0755 0 - newfile
uutils: empty
output/exit install --context a.txt b.txt sub files
GNU: f 0755 82 0a3117cd sub/a.txt
uutils: empty
output/exit install --di --no newfile a.txt newfile stderr
GNU: install: extra operand 'newfile'
Try 'install --help' for more information.
uutils: install: cannot create directory 'a.txt': File exists
files
GNU: empty
uutils: d 0755 0 - newfile
output/exit install --directory --owner=2 newdir stderr
GNU: install: cannot change owner and permissions of 'newdir': Operation not permitted
uutils: install: failed to chown 'newdir': changing ownership of 'newdir': Operation not permitted
files
GNU: d 0700 0 - newdir
uutils: d 0755 0 - newdir
output/exit install --directory --strip a.txt newfile stderr
GNU: install: the strip option may not be used when installing a directory
uutils: install: cannot create directory 'a.txt': File exists
files
GNU: empty
uutils: d 0755 0 - newfile
output/exit install --gr=2 -d newfile stderr
GNU: install: cannot change owner and permissions of 'newfile': Operation not permitted
uutils: install: failed to chown 'newfile': changing group of 'newfile': Operation not permitted
files
GNU: d 0700 0 - newfile
uutils: d 0755 0 - newfile
output/exit install --group=1 --ba= a.txt newfile stderr
GNU: install: cannot change ownership of 'newfile': Operation not permitted
uutils: install: ambiguous argument '' for 'backup type'
Valid arguments are:
+5 lines
files
GNU: f 0600 82 0a3117cd newfile
uutils: empty
output/exit join --hea --ze unicode.txt nonl.txt stdout
GNU: zażółć gęślą jaźń Ångström <U+65E5><U+672C><U+8A9E> newline at end\00 (no newline)
uutils: zażółć gęślą jaźń Ångström <U+65E5><U+672C><U+8A9E> newline at end\00 (no newline)
output/exit join -12 -22 -t1 a.txt b.txt stdout
GNU: 1cherry 2
uutils: 1cherry 21
output/exit join -a 1 a.txt b.txt stdout
GNU: trailing space
uutils: trailing space
output/exit join -a2 -z a.txt b.txt stdout
GNU: apple 10 banana 3 date 7 Elder berry\00 (no newline)
uutils: apple 10 banana 3 date 7 Elder berry \00 (no newline)
output/exit join -j 10 a.txt b.txt stdout
GNU: banana 3
uutils: banana 3
+9 more differing parts in stdout
output/exit join -j 2 -a2 a.txt b.txt stdout
GNU: empty
uutils: empty
output/exit join -v 1 a.txt b.txt stdout
GNU: trailing space
uutils: trailing space
output/exit ln --backup=1 a.txt newlink stderr
GNU: Try 'ln --help' for more information.
uutils: Try 'ln ln --help' for more information.
files
GNU: f 0644 82 0a3117cd newlink
uutils: empty
output/exit ln --interactive --sy -b a.txt stderr
GNU: ln: replace './a.txt'? (no newline)
uutils: ln: replace './a.txt'? ln:
files
GNU: f 0644 82 0a3117cd a.txt
uutils: f 0644 82 0a3117cd a.txt~
output/exit ln --interactive -s --suffix=184467440737095​51615 a.txt stderr
GNU: ln: replace './a.txt'? (no newline)
uutils: ln: replace './a.txt'? ln:
files
GNU: f 0644 82 0a3117cd a.txt
uutils: f 0644 82 0a3117cd a.txt1844674407370955161​5
output/exit ln -v a.txt newlink stdout
GNU: 'newlink' => 'a.txt'
uutils: 'newlink' -> 'a.txt'
output/exit ls --all -X stdout
GNU: empty
uutils: .
..
+1 more differing parts in stdout
output/exit ls --bl 0 --classify=2 exit GNU 2, uutils 1
stderr
GNU: ls: invalid --block-size argument '0'
uutils: error: invalid value '2' for '--classify[=<when>]'
[possible values: always, auto, never]
+1 lines
output/exit ls --bl 0 --time 2 exit GNU 2, uutils 1
stderr
GNU: ls: invalid --block-size argument '0'
uutils: error: invalid value '2' for '--time <field>'
[possible values: atime, ctime, mtime, birth]
+1 lines
output/exit ls --bl 9223372036854775807 -s stdout
GNU: total 1
1 a.txt
+4 lines
uutils: total 0
0 a.txt
+4 lines
+3 more differing parts in stdout
output/exit ls --block-size 0 --quoti=2 exit GNU 2, uutils 1
stderr
GNU: ls: invalid --block-size argument '0'
uutils: error: invalid value '2' for '--quoting-style <quoting-style>'
[possible values: literal, locale, shell, shell-escape, shell-always, shell-escape-always, clocale, c, escap...
+1 lines
output/exit ls --block-size 1,2 --sort=1 exit GNU 2, uutils 1
stderr
GNU: ls: invalid suffix in --block-size argument '1,2'
uutils: error: invalid value '1' for '--sort <field>'
[possible values: name, none, time, size, version, extension, width]
+1 lines
output/exit ls --block-size=0 --color=2 exit GNU 2, uutils 1
stderr
GNU: ls: invalid --block-size argument '0'
uutils: error: invalid value '2' for '--color[=<color>]'
[possible values: always, auto, never]
+1 lines
output/exit ls --fo=a stdout
GNU: exec.sh link long.txt→nonl.txt sp ace.txt stdin.txt sub
uutils: exec.sh→ link long.txt→nonl.txt sp ace.txt stdin.txt→ sub
output/exit ls --full-time sub empty.txt stdout
GNU: -rw-r--r-- 1 ubuntu ubuntu 0 2020-09-18 12:26:40.000000000 +0000 empty.txt
uutils: -rw-r--r-- 1 ubuntu ubuntu 0 2020-09-18 12:26:40.000000000 +0000 empty.txt
output/exit ls --hyperlink=always stdout
GNU: ]8;;file://b7c69a5a0ad3​/home/rafal/Projekty/Obc​e/coreutils/tmp/flagdiff​/work/sandbox/run-7-1791​80606562211799...
uutils: ]8;;file://b7c69a5a0ad3​\dangling]8;;\
+1 more differing parts in stdout
output/exit mkdir --co newdir missing.txt files
GNU: d 0755 0 - newdir
uutils: empty
output/exit mkdir --context --mo=2 sub newdir stderr
GNU: mkdir: cannot create directory 'sub': File exists
uutils: error: a value is required for '--context <CTX>' but none was supplied
For more information, try '--help'.
files
GNU: d 0002 0 - newdir
uutils: empty
output/exit mkdir --mo=1,2 newdir newdir stderr
GNU: mkdir: invalid mode '1,2'
uutils: mkdir: newdir: File exists
files
GNU: empty
uutils: d 0002 0 - newdir
output/exit mkfifo --mo=1,2 sub newdir stderr
GNU: mkfifo: invalid mode
uutils: mkfifo: cannot create fifo 'sub': File exists
files
GNU: empty
uutils: o 0002 0 - newdir
output/exit mv --backup=1 b.txt moved.txt stderr
GNU: Try 'mv --help' for more information.
uutils: Try 'mv mv --help' for more information.
files
GNU: f 0644 38 5949bba7 moved.txt
uutils: f 0644 38 5949bba7 b.txt
output/exit mv --update=none --suffix 1 b.txt moved.txt stderr
GNU: mv: cannot combine --backup with --exchange, -n, or --update=none-fail
Try 'mv --help' for more information.
uutils: mv: cannot combine --backup with -n/--no-clobber or --update=none-fail
Try 'mv mv --help' for more information.
files
GNU: f 0644 38 5949bba7 moved.txt
uutils: f 0644 38 5949bba7 b.txt
output/exit mv --update=none -b link copy.txt stderr
GNU: mv: cannot combine --backup with --exchange, -n, or --update=none-fail
Try 'mv --help' for more information.
uutils: mv: cannot combine --backup with -n/--no-clobber or --update=none-fail
Try 'mv mv --help' for more information.
files
GNU: l 0777 0 - copy.txt -> a.txt
uutils: l 0777 0 - link -> a.txt
output/exit mv -S9223372036854775807 --no-clobber sub newdir stderr
GNU: mv: cannot combine --backup with --exchange, -n, or --update=none-fail
Try 'mv --help' for more information.
uutils: mv: cannot combine --backup with -n/--no-clobber or --update=none-fail
Try 'mv mv --help' for more information.
files
GNU: d 0755 0 - newdir
f 0644 7 8febb964 newdir/.hidden
+3 lines
uutils: d 0755 0 - sub
f 0644 7 8febb964 sub/.hidden
+3 lines
output/exit mv -b --no-clobber b.txt moved.txt stderr
GNU: mv: cannot combine --backup with --exchange, -n, or --update=none-fail
Try 'mv --help' for more information.
uutils: mv: cannot combine --backup with -n/--no-clobber or --update=none-fail
Try 'mv mv --help' for more information.
files
GNU: f 0644 38 5949bba7 moved.txt
uutils: f 0644 38 5949bba7 b.txt
output/exit nl --body-numbering=a.txt b.txt missing.txt stdout
GNU: 1→apple 10
2→banana 3
+3 lines
uutils: empty
stderr
GNU: nl: missing.txt: No such file or directory
uutils: nl: Invalid arguments supplied.
invalid numbering style: 'a.txt'
output/exit nl --fo a.txt 'sp ace.txt' sub stdout
GNU: 1→file with space
2→second
uutils: empty
stderr
GNU: nl: sub: Is a directory
uutils: nl: Invalid arguments supplied.
invalid numbering style: 'a.txt'
output/exit nl --header-numbering=a.txt b.txt missing.txt stdout
GNU: 1→apple 10
2→banana 3
+2 lines
uutils: empty
stderr
GNU: nl: missing.txt: No such file or directory
uutils: nl: Invalid arguments supplied.
invalid numbering style: 'a.txt'
output/exit nl --li -1 b.txt missing.txt stdout
GNU: 1→apple 10
0→banana 3
+2 lines
uutils: empty
stderr
GNU: nl: missing.txt: No such file or directory
uutils: error: unexpected argument '-1' found
tip: to pass '-1' as a value, use '-- -1'
+2 lines
output/exit nl -s 18446744073709551615 stdout
GNU: empty
uutils: empty
output/exit numfmt --from a exit GNU 2, uutils 1
stderr
GNU: numfmt: invalid number: 'from'
uutils: numfmt: invalid argument 'a' for '--from'
output/exit numfmt --from- +5 exit GNU 2, uutils 1
stderr
GNU: numfmt: invalid number: 'from'
uutils: numfmt: invalid unit size: '+5'
output/exit numfmt --invalid=a exit GNU 2, uutils 1
stderr
GNU: numfmt: invalid number: 'from'
uutils: error: invalid value 'a' for '--invalid <INVALID>'
[possible values: abort, fail, warn, ignore]
+1 lines
output/exit od 'sp ace.txt' sub stdout
GNU: 0000027
uutils: empty
output/exit od --fo=a stdout
GNU: 0000000 f r o m sp s t d i n nl l i n e sp
0000020 t w o nl nl l i n e sp f o u r nl
uutils: 0000000 071146 066557 071440 062164 067151 066012 067151 020145
0000020 073564 005157 066012 067151 020145 067546 071165 000012
output/exit paste 'sp ace.txt' sub stdout
GNU: file with space→
second→
uutils: empty
stderr
GNU: paste: sub: Is a directory
uutils: paste: Is a directory
output/exit paste -s b.txt missing.txt stdout
GNU: apple 10→banana 3→date 7→→Elder berry
uutils: empty
stderr
GNU: paste: missing.txt: No such file or directory
uutils: paste: No such file or directory
output/exit <pipe> ptx --se a -b b.txt --ma 2 unicode.txt nonl.txt stdout
GNU: źń Ån gström <U+65E5><U+672C><U+8A9E>
żółć gęślą ja
+11 lines
uutils: źń Ån gström <U+65E5><U+672C><U+8A9E>​/
żółć gęślą j
+11 lines
output/exit ptx stdout
GNU: from stdin line two line four
from stdin line two line four
+4 lines
uutils: line four
from stdin
+4 lines
output/exit ptx --right-side-refs -M18446744073709551615 binary.bin stdout
GNU: /"#$%&'()*+,-./012345678​9:;<=>?@ ABCDEFGHIJKLMNOPQRSTUVWX​YZ[\]^_`/
<U+FFFD><U+FFFD><U+FFFD>​<U+FFFD><U+FFFD><U+FFFD>​<U+FFFD><U+FFFD><U+FFFD>​<U+FFFD><U+FFFD><U+FFFD>​<U+FFFD><U+FFFD><U+FFFD>​<U+FFFD><U+FFFD><U+FFFD>​<U+FFFD><U+FFFD><U+FFFD>​/ /[\]^_` abcdefghijklmnopqrstuvwx​yz{|}~<U+FFFD><U+FFFD><​U+FFFD>
uutils: /!"#$%&'()*+,-./01234567​89:;<=>?@ ABCDEFGHIJKLMNOPQRSTUVWX​YZ/
/ abcdefghijklmnopqrstuvwx​yz/
output/exit ptx --right-side-refs -b b.txt --wi +5 crlf.txt stdout
GNU: / /
/ h/
+2 lines
uutils: / h/
o/
+1 lines
output/exit ptx --traditional -i 1 unicode.txt nonl.txt stderr
GNU: ptx: 1: No such file or directory
uutils: ptx: : No such file or directory
files
GNU: f 0644 0 150c532c nonl.txt
uutils: f 0644 17 d08ada44 nonl.txt
output/exit realpath --no --logical dangling stdout
GNU: /home/rafal/Projekty/Obc​e/coreutils/tmp/flagdiff​/work/sandbox/run-7-1791​806065622117992/slot3/bo​x/missing
uutils: /home/rafal/Projekty/Obc​e/coreutils/tmp/flagdiff​/work/sandbox/run-7-1791​806065622117992/slot3/bo​x/dangling
output/exit rm --pr empty.txt missing.txt stderr
GNU: rm: cannot remove 'missing.txt': No such file or directory
uutils: error: unexpected argument '--pr' found
tip: a similar argument exists: '--progress'
+2 lines
files
GNU: empty
uutils: f 0644 0 150c532c empty.txt
output/exit shuf --re --ra=b.txt stdout
GNU: line two
from stdin
+111 lines
uutils: empty
stderr
GNU: shuf: 'b.txt': end of file
uutils: error: unexpected argument '--ra' found
tip: a similar argument exists: '--random-seed'
+4 lines
output/exit split --filter=1 exit GNU 127, uutils 1
stderr
GNU: sh: 1: 1: not found
split: with FILE=xaa, exit 127 from command: 1
uutils: /bin/sh: 1: 1: not found
split: Shell process returned 127
output/exit split --hex-suffixes=1 -d #13749 files
GNU: f 0644 31 31ed1b75 x01
uutils: f 0644 31 31ed1b75 x00
output/exit split --hex-suffixes=1 -x #13749 files
GNU: f 0644 31 31ed1b75 x01
uutils: f 0644 31 31ed1b75 x00
output/exit split --nume=1 --hex #13749 files
GNU: f 0644 31 31ed1b75 x01
uutils: f 0644 31 31ed1b75 x00
output/exit split --nume=1 -x #13749 files
GNU: f 0644 31 31ed1b75 x01
uutils: f 0644 31 31ed1b75 x00
output/exit split --nume=2 -d #13749 files
GNU: f 0644 31 31ed1b75 x02
uutils: f 0644 31 31ed1b75 x00
output/exit split --verbose --filter : stdout
GNU: executing with FILE=xaa
uutils: creating file 'xaa'
output/exit split -n2 --verb stdout
GNU: creating file 'xaa'
creating file 'xab'
uutils: empty
output/exit stat --printf 9223372036854775807 --fo 9223372036854775807 b.txt stdout
GNU: 9223372036854775807
uutils: 9223372036854775807 (no newline)
output/exit sum -s -r stdout
GNU: 44019 1
uutils: 2756 1
output/exit tail --max-unchanged-stats=92​23372036854775807 'sp ace.txt' sub stdout
GNU: ==> 'sp ace.txt' <==
file with space
+2 lines
uutils: empty
stderr
GNU: tail: error reading 'sub': Is a directory
uutils: tail: invalid maximum number of unchanged stats between opens: '9223372036854775807'
Try 'tail tail --help' for more information.
output/exit tail -n1-3 --by=2 'sp ace.txt' sub stdout
GNU: empty
uutils: ==> 'sp ace.txt' <==
d
+1 lines
stderr
GNU: tail: invalid number of lines: '1-3'
uutils: tail: error reading 'sub': Is a directory
output/exit timeout 1 --foreground exit GNU 127, uutils 125
stderr
GNU: timeout: failed to run command '--foreground': No such file or directory
uutils: error: the following required arguments were not provided:
<command>...
+2 lines
output/exit timeout 1 --ki=1844674407370955161​5 #15178 exit GNU 127, uutils 125
stderr
GNU: timeout: failed to run command '--ki=184467440737095516​15': No such file or directory
uutils: error: the following required arguments were not provided:
<command>...
+2 lines
output/exit timeout 1 -s1,2 exit GNU 127, uutils 125
stderr
GNU: timeout: failed to run command '-s1,2': No such file or directory
uutils: error: the following required arguments were not provided:
<command>...
+2 lines
output/exit timeout 1 -v exit GNU 127, uutils 125
stderr
GNU: timeout: failed to run command '-v': No such file or directory
uutils: error: the following required arguments were not provided:
<command>...
+2 lines
output/exit truncate -s 9223372036854775807 -o - stderr
GNU: truncate: overflow in 9223372036854775807 * 4096 byte blocks for file '-'
uutils: truncate: overflow in 9223372036854775807 * 4096 byte blocks
files
GNU: f 0644 0 150c532c -
uutils: empty
output/exit uname --all- --all stdout
GNU: Linux b7c69a5a0ad3 7.0.0-38-generic #38-Ubuntu SMP PREEMPT_DYNAMIC Fri Sep 4 09:10:14 UTC 2026 x86_64 GNU/Lin...
uutils: Kernel name: Linux
Node name: b7c69a5a0ad3
+4 lines
output/exit uniq --skip-fields=2 binary.bin stdout
GNU: empty
uutils:  (no newline)
 !"#$%&'()*+,-./012345678​9:;<=>?@ABCDEFGHIJKLMNOP​QRSTUVWXYZ[\]^_`abcdefgh​ijklmnopqrstuvwxyz{|}~<​U+FFFD><U+FFFD><U+FFFD><​U+FFFD><U+FFFD><U+FFFD><​U+FFFD><U+FFFD><U+FFFD><​U+FFFD><U+FFFD><U+FFFD><​U+FFFD>...
output/exit uniq -f 2 -1 stdout
GNU: line two
line four
uutils: empty
output/exit uniq b.txt +1 stdout
GNU: apple 10
banana 3
+2 lines
uutils: empty
files
GNU: empty
uutils: f 0644 38 5949bba7 +1
output/exit wc stdout
GNU: 4 6 31
uutils: 4 6 31
output/exit wc --by --words stdout
GNU: 6 31
uutils: 6 31
output/exit wc --ch --words stdout
GNU: 6 31
uutils: 6 31
output/exit wc --li --words stdout
GNU: 4 6
uutils: 4 6
output/exit wc --ma --by stdout
GNU: 31 10
uutils: 31 10
output/exit wc --ma --li stdout
GNU: 4 10
uutils: 4 10
output/exit wc --max-line-length unicode.txt stdout
GNU: 8 unicode.txt
uutils: 17 unicode.txt
output/exit wc --words --ma stdout
GNU: 6 10
uutils: 6 10
output/exit wc -l -c stdout
GNU: 4 31
uutils: 4 31
output/exit wc -m unicode.txt stdout
GNU: 48 unicode.txt
uutils: 31 unicode.txt
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