[DTrace-devel] [PATCH v2] Fix printf formatting with non-monetary grouping chars

[Kris Van Hees]

On Fri, Jan 16, 2026 at 04:14:32PM -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.
> Currently, support is largely implemented, but simply not working.
> 
> Add a setlocale() call to pick LC_NUMERIC up from environment variables.
> 
> Orabug: 30430270
> Signed-off-by: Eugene Loh <eugene.loh at oracle.com>

Reviewed-by: Kris Van Hees <kris.van.hees at oracle.com>

> ---
>  cmd/dtrace.c                                  |  5 +++-
>  test/unittest/printf/tst.grouping-LC_ALL.r    |  5 ++++
>  test/unittest/printf/tst.grouping-LC_ALL.sh   | 29 +++++++++++++++++++
>  test/unittest/printf/tst.grouping-LC_ALL.x    | 13 +++++++++
>  .../unittest/printf/tst.grouping-LC_NUMERIC.r |  5 ++++
>  .../printf/tst.grouping-LC_NUMERIC.sh         | 29 +++++++++++++++++++
>  .../unittest/printf/tst.grouping-LC_NUMERIC.x | 13 +++++++++
>  7 files changed, 98 insertions(+), 1 deletion(-)
>  create mode 100644 test/unittest/printf/tst.grouping-LC_ALL.r
>  create mode 100755 test/unittest/printf/tst.grouping-LC_ALL.sh
>  create mode 100755 test/unittest/printf/tst.grouping-LC_ALL.x
>  create mode 100644 test/unittest/printf/tst.grouping-LC_NUMERIC.r
>  create mode 100755 test/unittest/printf/tst.grouping-LC_NUMERIC.sh
>  create mode 100755 test/unittest/printf/tst.grouping-LC_NUMERIC.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-LC_ALL.r b/test/unittest/printf/tst.grouping-LC_ALL.r
> new file mode 100644
> index 000000000..077a0b7f9
> --- /dev/null
> +++ b/test/unittest/printf/tst.grouping-LC_ALL.r
> @@ -0,0 +1,5 @@
> +123456789
> +
> +123,456,789
> +
> +success
> diff --git a/test/unittest/printf/tst.grouping-LC_ALL.sh b/test/unittest/printf/tst.grouping-LC_ALL.sh
> new file mode 100755
> index 000000000..970dc3420
> --- /dev/null
> +++ b/test/unittest/printf/tst.grouping-LC_ALL.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=$1
> +
> +for mylocale in C en_US.utf8; do
> +	export LC_ALL=$mylocale
> +
> +	$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-LC_ALL.x b/test/unittest/printf/tst.grouping-LC_ALL.x
> new file mode 100755
> index 000000000..c55a29a9a
> --- /dev/null
> +++ b/test/unittest/printf/tst.grouping-LC_ALL.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 -q en_US.utf8 ; then
> +	exit 0
> +fi
> +
> +echo the en_US.utf8 locale was not found
> +exit 2
> diff --git a/test/unittest/printf/tst.grouping-LC_NUMERIC.r b/test/unittest/printf/tst.grouping-LC_NUMERIC.r
> new file mode 100644
> index 000000000..077a0b7f9
> --- /dev/null
> +++ b/test/unittest/printf/tst.grouping-LC_NUMERIC.r
> @@ -0,0 +1,5 @@
> +123456789
> +
> +123,456,789
> +
> +success
> diff --git a/test/unittest/printf/tst.grouping-LC_NUMERIC.sh b/test/unittest/printf/tst.grouping-LC_NUMERIC.sh
> new file mode 100755
> index 000000000..1e95901fc
> --- /dev/null
> +++ b/test/unittest/printf/tst.grouping-LC_NUMERIC.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=$1
> +
> +for mylocale in C en_US.utf8; do
> +	export LC_NUMERIC=$mylocale
> +
> +	$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-LC_NUMERIC.x b/test/unittest/printf/tst.grouping-LC_NUMERIC.x
> new file mode 100755
> index 000000000..c55a29a9a
> --- /dev/null
> +++ b/test/unittest/printf/tst.grouping-LC_NUMERIC.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 -q en_US.utf8 ; then
> +	exit 0
> +fi
> +
> +echo the en_US.utf8 locale was not found
> +exit 2
> -- 
> 2.47.3
>