du: Print progress information to stderr - src

diff --git a/usr.bin/du/du.1 b/usr.bin/du/du.1
index db77fb276fe2..fb2b9adafdaa 100644
--- a/usr.bin/du/du.1
+++ b/usr.bin/du/du.1

@@ -25,7 +25,7 @@

.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

.\" SUCH DAMAGE.

.\"

-.Dd June 9, 2026

+.Dd August 7, 2026

.Dt DU 1

.Os

.Sh NAME

@@ -195,6 +195,16 @@ and

.Fl Fl si

options all override each other; the last one specified determines

the block counts used.

+.Pp

+If

+.Nm

+receives a

+.Dv SIGINFO

+(see the

+.Cm status

+argument for

+.Xr stty 1 )

+signal, the current file will be written to the standard error output.

.Sh ENVIRONMENT

.Bl -tag -width BLOCKSIZE

.It Ev BLOCKSIZE

diff --git a/usr.bin/du/du.c b/usr.bin/du/du.c
index bf138b1b5e36..47ed3c840d5a 100644
--- a/usr.bin/du/du.c
+++ b/usr.bin/du/du.c

@@ -270,6 +270,10 @@ main(int argc, char *argv[])

xo_open_container("disk-usage-information");

xo_open_list("paths");

for (errno = 0; (p = fts_read(fts)) != NULL; errno = 0) {

+ if (info) {

+ info = 0;

+ (void)fprintf(stderr, "\t%s\n", p->fts_path);

+ }

switch (p->fts_info) {

case FTS_D: /* Ignore. */

if (ignorep(p))

@@ -284,10 +288,6 @@ main(int argc, char *argv[])

if (p->fts_level <= depth && check_threshold(p))

print_file_size(p);

- if (info) {

- info = 0;

- (void)printf("\t%s\n", p->fts_path);

- }

break;

case FTS_DC: /* Ignore. */

break;