$ size src/coreutils-prev
text data bss dec hex filename
1476092 7348 2191936 3675376 3814f0 src/coreutils-prev
$ size src/coreutils
text data bss dec hex filename
1474612 7348 2191968 3673928 380f48 src/coreutils
* src/local.mk (noinst_HEADERS): Add src/true.h.
(src_false_LDADD): Organize with the rest of the reused programs. Use
$(src_true_LDADD) instead of $(LDADD).
(src_true_SOURCES, src_false_SOURCES): New variables.
* build-aux/gen-single-binary.sh (override_single): Map 'false' to
'true'.
* src/false.c: Remove file.
* po/POTFILES.in: Remove src/false.c.
* cfg.mk (_src): Match src/true-false.c and src/true-true.c.
* src/coreutils-false.c: New file.
* src/true-false.c: Likewise.
* src/true-true.c: Likewise.
* src/true.h: Likewise.
* src/true.c: Include true.h.
(EXIT_STATUS): Always define the macro to use the value of the TRUE_MODE
variable.
(PROGRAM_NAME): Likewise.
* NEWS: Mention the improvement.
---
NEWS | 4 ++--
build-aux/gen-single-binary.sh | 1 +
cfg.mk | 2 +-
po/POTFILES.in | 1 -
src/coreutils-false.c | 31 +++++++++++++++++++++++++++++++
src/false.c | 2 --
src/local.mk | 7 ++++++-
src/true-false.c | 2 ++
src/true-true.c | 2 ++
src/true.c | 13 +++----------
src/true.h | 10 ++++++++++
11 files changed, 58 insertions(+), 17 deletions(-)
create mode 100644 src/coreutils-false.c
delete mode 100644 src/false.c
create mode 100644 src/true-false.c
create mode 100644 src/true-true.c
create mode 100644 src/true.h
diff --git a/NEWS b/NEWS
index 19fb04ce1..73c7af9d1 100644
--- a/NEWS
+++ b/NEWS
@@ -80,8 +80,8 @@ GNU coreutils NEWS -*-
outline -*-
** Build-related
The multi-call binary built with configure --enable-single-binary
- in size by around 9KB through the more efficient reuse of the 'test' utility
- by '['.
+ in size by around 10KB through the more efficient reuse of the 'test' utility
+ by '[' and the 'true' utility by 'false'.
configure no longer accepts the --with-linux-crypto option, which allowed
cksum, md5sum, and sha*sum to use the Linux AF_ALG API. This API will be
diff --git a/build-aux/gen-single-binary.sh b/build-aux/gen-single-binary.sh
index 8d9fb0d52..33a431b1c 100755
--- a/build-aux/gen-single-binary.sh
+++ b/build-aux/gen-single-binary.sh
@@ -76,6 +76,7 @@ override_single() {
}
# This is for the '[' program. Automake transliterates '[' and '/' to '_'.
override_single _ test
+override_single false true
override_single dir ls
override_single vdir ls
override_single arch uname
diff --git a/cfg.mk b/cfg.mk
index 2848d6fdc..90e6a21d1 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -931,7 +931,7 @@ exclude_file_name_regexp--sc_system_h_headers = \
_src := (false|chown-(chgrp|chown)
_src := $(_src)|ls-(dir|ls|vdir)|make-prime-list|tac-pipe|test-(lbracket|test)
-_src := $(_src)|uname-(arch|uname))
+_src := $(_src)|true-(false|true)|uname-(arch|uname))
_gl_src = (xdecto.max|cl-strtold)
exclude_file_name_regexp--sc_require_config_h_first = \
(^lib/buffer-lcm\.c|gl/lib/$(_gl_src)\.c|src/$(_src)\.c)$$
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 0c9dfe810..905de6e26 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -63,7 +63,6 @@ src/expand-common.c
src/expand.c
src/expr.c
src/factor.c
-src/false.c
src/find-mount-point.c
src/fmt.c
src/fold.c
diff --git a/src/coreutils-false.c b/src/coreutils-false.c
new file mode 100644
index 000000000..9765ea1ab
--- /dev/null
+++ b/src/coreutils-false.c
@@ -0,0 +1,31 @@
+/* false -- wrapper to true with the right true_mode.
+ Copyright (C) 2026 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+#include "system.h"
+
+#include "true.h"
+/* Ensure that the main for true is declared even if the tool is not being
+ built in this single-binary. */
+int single_binary_main_true (int argc, char **argv);
+int single_binary_main_false (int argc, char **argv);
+
+int
+single_binary_main_false (int argc, char **argv)
+{
+ true_mode = TRUE_FALSE;
+ return single_binary_main_true (argc, argv);
+}
diff --git a/src/false.c b/src/false.c
deleted file mode 100644
index bc9c703a5..000000000
--- a/src/false.c
+++ /dev/null
@@ -1,2 +0,0 @@
-#define EXIT_STATUS EXIT_FAILURE
-#include "true.c"
diff --git a/src/local.mk b/src/local.mk
index 1a6079d69..d7d6ae509 100644
--- a/src/local.mk
+++ b/src/local.mk
@@ -67,6 +67,7 @@ noinst_HEADERS = \
src/temp-stream.h \
src/term-sig.h \
src/test.h \
+ src/true.h \
src/uname.h \
src/wc.h
@@ -141,7 +142,7 @@ src_env_LDADD = $(LDADD)
src_expand_LDADD = $(LDADD)
src_expr_LDADD = $(LDADD)
src_factor_LDADD = $(LDADD)
-src_false_LDADD = $(LDADD)
+# See src_false_LDADD below
src_fmt_LDADD = $(LDADD)
src_fold_LDADD = $(LDADD)
src_getlimits_LDADD = $(LDADD)
@@ -224,6 +225,7 @@ src_yes_LDADD = $(LDADD)
# Synonyms. Recall that Automake transliterates '[' and '/' to '_'.
src___LDADD = $(src_test_LDADD)
+src_false_LDADD = $(src_true_LDADD)
src_dir_LDADD = $(src_ls_LDADD)
src_vdir_LDADD = $(src_ls_LDADD)
src_chgrp_LDADD = $(src_chown_LDADD)
@@ -421,6 +423,9 @@ src_mknod_SOURCES = src/mknod.c $(selinux_sources)
src_df_SOURCES = src/df.c src/find-mount-point.c
src_stat_SOURCES = src/stat.c src/find-mount-point.c
+src_true_SOURCES = src/true.c src/true-true.c
+src_false_SOURCES = src/true.c src/true-false.c
+
src_uname_SOURCES = src/uname.c src/uname-uname.c
src_arch_SOURCES = src/uname.c src/uname-arch.c
diff --git a/src/true-false.c b/src/true-false.c
new file mode 100644
index 000000000..021e5b8d3
--- /dev/null
+++ b/src/true-false.c
@@ -0,0 +1,2 @@
+#include "true.h"
+enum true_modes true_mode = TRUE_FALSE;
diff --git a/src/true-true.c b/src/true-true.c
new file mode 100644
index 000000000..93be3e436
--- /dev/null
+++ b/src/true-true.c
@@ -0,0 +1,2 @@
+#include "true.h"
+enum true_modes true_mode = TRUE_TRUE;
diff --git a/src/true.c b/src/true.c
index 6603177f4..d383c7976 100644
--- a/src/true.c
+++ b/src/true.c
@@ -18,17 +18,10 @@
#include <stdio.h>
#include <sys/types.h>
#include "system.h"
+#include "true.h"
-/* Act like "true" by default; false.c overrides this. */
-#ifndef EXIT_STATUS
-# define EXIT_STATUS EXIT_SUCCESS
-#endif
-
-#if EXIT_STATUS == EXIT_SUCCESS
-# define PROGRAM_NAME "true"
-#else
-# define PROGRAM_NAME "false"
-#endif
+#define EXIT_STATUS (true_mode != TRUE_TRUE)
+#define PROGRAM_NAME (true_mode == TRUE_TRUE ? "true" : "false")
#define AUTHORS proper_name ("Jim Meyering")
diff --git a/src/true.h b/src/true.h
new file mode 100644
index 000000000..7fdd28e8f
--- /dev/null
+++ b/src/true.h
@@ -0,0 +1,10 @@
+enum true_modes
+{
+ /* This is for the 'true' program. */
+ TRUE_TRUE,
+
+ /* This is for the 'false' program. */
+ TRUE_FALSE
+};
+
+extern enum true_modes true_mode;
--
2.55.0
