Package: coreutils
Version: 8.32-4.1
Severity: normal

Dear Maintainer,

Quoth du(1):
       -d, --max-depth=N
              print  the total for a directory (or file, with --all) only if it 
is N or fewer levels below the command
              line argument;  --max-depth=0 is the same as --summarize

But:
  $ du -as /dev/null
  du: cannot both summarize and show all entries
  Try 'du --help' for more information.
  $ du -ad0 /dev/null
  0       /dev/null
  $ du -sd0 /dev/null
  du: warning: summarizing is the same as using --max-depth=0
  0       /dev/null
  $ du -ss /dev/null
  0       /dev/null

The -as invocation is as-expected (and even matches POSIX!).
The -ad0 one isn't: it should error the same way as -as.
The -sd0 one isn't either: ex def. if it's the same then it should be
equivalent to -ss (which, as expected, is equivalent to just -s).

A solution would be to either
  (a) make it /actually/ be -s, matching the documentation, or
  (b) stop lying in the documentation.

Best,
наб

-- System Information:
Debian Release: 11.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 
'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.0-15-amd64 (SMP w/24 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_FIRMWARE_WORKAROUND, 
TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages coreutils depends on:
ii  libacl1      2.2.53-10
ii  libattr1     1:2.4.48-6
ii  libc6        2.31-13+deb11u3
ii  libgmp10     2:6.2.1+dfsg-1+deb11u1
ii  libselinux1  3.1-3

coreutils recommends no packages.

coreutils suggests no packages.

-- no debconf information

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