tag 79113 notabug
close 79113
stop
On 28/07/2025 15:44, Nicolas Boichat wrote:
Hi,
Version: env du --version => du (GNU coreutils) 9.7
OS: archlinux, x86-64
The GNU coreutils manual says
(https://www.gnu.org/software/coreutils/manual/coreutils.html#index-_002d_002dtime_002dstyle-1):
- "You can specify the default value of the --time-style option with
the environment variable TIME_STYLE; if TIME_STYLE is not set the
default style is ‘long-iso’." -> yes
- "For compatibility with ls, if TIME_STYLE begins with ‘+’ and
contains a newline, the newline and any later characters are ignored;"
Copying the full docs for this from the texinfo:
"You can specify the default value of the @option{--time-style} option
with the environment variable @env{TIME_STYLE}; if @env{TIME_STYLE} is not set
the default style is @samp{long-iso}. For compatibility with @command{ls},
if @env{TIME_STYLE} begins with @samp{+} and contains a newline,
the newline and any later characters are ignored; if @env{TIME_STYLE}
begins with @samp{posix-} the @samp{posix-} is ignored; and if
@env{TIME_STYLE} is @samp{locale} it is ignored."
That quite clearly states the above compat handling
is for the TIME_STYLE env var, and not the --time-style option itself.
That does not match behaviour, newlines are just used as-is:
```
$ env du --time --time-style="$(printf "+xyz\nabc")" blob
96 xyz
abc blob
```
Finally, the help text doesn't mention that +FORMAT is allowed.
Copying from the texinfo again:
"List timestamps using @var{format}, where @var{format} is interpreted
like the format argument of @command{date} (@pxref{date invocation}).
For example, @option{--time-style="+%Y-%m-%d %H:%M:%S"} causes
@command{du} to list timestamps like @samp{2020-07-21 23:45:56}. As
with @command{date}, @var{format}'s interpretation is affected by the
@env{LC_TIME} locale category."
thanks,
Padraig
