[DTrace-devel] [PATCH] Add support for printf formatting with non-monetary grouping chars

[Eugene Loh]

On wording and testing... gotcha.  I'm rescinding this patch. The 
replacement will have a slightly different title.

On 1/14/26 11:34, Kris Van Hees wrote:
> I would update the commit summary (one liner) to state that this patch fixes
> the non-monetary goruping rather than adding support.  The code was there to
> implement it - the only thing we missed was the setlocale() call to ensure
> that setting the locale with an env var would actually have an effect.
>
> On Wed, Jan 14, 2026 at 12:09:36AM -0500, eugene.loh at oracle.com wrote:
>> From: Eugene Loh <eugene.loh at oracle.com>
>>
>> Non-monetary grouping characters are used to separate groups of digits
>> in numbers that are not monetary values.  DTrace used to document
>> support for printf formatting, using a single quote, for such grouping.
>>
>> Add such support.
>>
> This is also a bit misleading I think.  Not only does DTrace cocument the
> support - the code actually supports it.  Just the setlocale() call was
> missing.
>
> I think the commit message should point that out rather than potentially giving
> the impression that this patch implements it.
>
>> Orabug: 30430270
>> Signed-off-by: Eugene Loh <eugene.loh at oracle.com>
>> ---
>>   cmd/dtrace.c                         |  5 ++++-
>>   test/unittest/printf/tst.grouping.r  |  5 +++++
>>   test/unittest/printf/tst.grouping.sh | 29 ++++++++++++++++++++++++++++
>>   test/unittest/printf/tst.grouping.x  | 13 +++++++++++++
>>   4 files changed, 51 insertions(+), 1 deletion(-)
>>   create mode 100644 test/unittest/printf/tst.grouping.r
>>   create mode 100755 test/unittest/printf/tst.grouping.sh
>>   create mode 100755 test/unittest/printf/tst.grouping.x
>>
>> diff --git a/cmd/dtrace.c b/cmd/dtrace.c
>> index baa73e9d7..6cd7aeadb 100644
>> --- a/cmd/dtrace.c
>> +++ b/cmd/dtrace.c
>> @@ -1,6 +1,6 @@
>>   /*
>>    * Oracle Linux DTrace.
>> - * Copyright (c) 2006, 2025, Oracle and/or its affiliates. All rights reserved.
>> + * Copyright (c) 2006, 2026, Oracle and/or its affiliates. All rights reserved.
>>    * Licensed under the Universal Permissive License v 1.0 as shown at
>>    * http://oss.oracle.com/licenses/upl.
>>    */
>> @@ -9,6 +9,7 @@
>>   #include <sys/stat.h>
>>   #include <sys/wait.h>
>>   #include <sys/compiler.h>
>> +#include <locale.h>
>>   
>>   #include <dtrace.h>
>>   #include <stdlib.h>
>> @@ -924,6 +925,8 @@ main(int argc, char *argv[])
>>   	pid_t pid;
>>   	struct dtrace_proc *proc;
>>   
>> +	setlocale(LC_NUMERIC, "");
>> +
>>   	g_ofp = stdout;
>>   
>>   	g_pname = basename(argv[0]);
>> diff --git a/test/unittest/printf/tst.grouping.r b/test/unittest/printf/tst.grouping.r
>> new file mode 100644
>> index 000000000..077a0b7f9
>> --- /dev/null
>> +++ b/test/unittest/printf/tst.grouping.r
>> @@ -0,0 +1,5 @@
>> +123456789
>> +
>> +123,456,789
>> +
>> +success
>> diff --git a/test/unittest/printf/tst.grouping.sh b/test/unittest/printf/tst.grouping.sh
>> new file mode 100755
>> index 000000000..13b953758
>> --- /dev/null
>> +++ b/test/unittest/printf/tst.grouping.sh
>> @@ -0,0 +1,29 @@
>> +#!/bin/bash
>> +#
>> +# Oracle Linux DTrace.
>> +# Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
>> +# Licensed under the Universal Permissive License v 1.0 as shown at
>> +# http://oss.oracle.com/licenses/upl.
>> +#
>> +
>> +dtrace=$1
>> +
>> +for mylocale in C en_US.UTF-8; do
>> +	export LC_ALL=$mylocale
> Shouldn't you test both LC_ALL and LC_NUMERIC, especially since many sources
> seem to suggest that setting LC_ALL is a bad idea, and that people should set
> the specific sub-areas they need (since LC_ALL is an override for all and
> might have other effects people do not intend).
>
>> +
>> +	$dtrace $dt_flags -qs /dev/stdin << EOF
>> +	BEGIN
>> +	{
>> +		printf("%'d\n", 123456789);
>> +		exit(0);
>> +	}
>> +EOF
>> +	if [ $? -ne 0 ]; then
>> +		echo ERROR: dtrace
>> +		locale
>> +		exit 1
>> +	fi
>> +done
>> +
>> +echo success
>> +exit 0
>> diff --git a/test/unittest/printf/tst.grouping.x b/test/unittest/printf/tst.grouping.x
>> new file mode 100755
>> index 000000000..9993fbcd3
>> --- /dev/null
>> +++ b/test/unittest/printf/tst.grouping.x
>> @@ -0,0 +1,13 @@
>> +#!/bin/bash
>> +#
>> +# Oracle Linux DTrace.
>> +# Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
>> +# Licensed under the Universal Permissive License v 1.0 as shown at
>> +# http://oss.oracle.com/licenses/upl.
>> +
>> +if locale -a | grep en_US.utf8 ; then
>> +	exit 0
>> +fi
>> +
>> +echo install glibc-langpack-en yum package for this test
>> +exit 2
>> -- 
>> 2.47.3
>>