maint: make some shell and perl scripts executable in 'tests/'

Some newer test scripts - partially ones from me - are not executable.
It does not seem to be a problem, but for consistency and to avoid
future problems on unusual platforms or shells change the permissions
by adding the executable bit.

* cfg.mk (sc_tests_executable): Add new syntax-check rule to ensure
that all test scripts are executable.
* tests/df/df-output.sh: Change file mode from 644 to 755.
* tests/du/threshold.sh: Likewise.
* tests/factor/run.sh: Likewise.
* tests/init.sh: Likewise.
* tests/misc/csplit-suppress-matched.pl: Likewise.
* tests/misc/numfmt.pl: Likewise.
* tests/tail-2/retry.sh: Likewise.

8 files changed, 8 insertions, 0 deletions

diff --git a/cfg.mk b/cfg.mk
index 7b14c07f1..a4f36ff5f 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -115,6 +115,14 @@ sc_tests_list_consistency:
 	    | $(EGREP) "$$test_extensions_rx\$$";			\
 	} | sort | uniq -u | grep . && exit 1; :
 
+# Ensure that all version-controlled test scripts are executable.
+sc_tests_executable:
+	@test_extensions_rx=`echo $(TEST_EXTENSIONS)			\
+	  | sed -e "s/ / -o -name */g" -e "s/^/-name */"`; \
+	find tests/ \( $$test_extensions_rx \) \! -perm -111 -print \
+	  | sed -e "s/^/$(ME): Please make test executable: /" | grep . \
+	    && exit 1; :
+
 # Create a list of regular expressions matching the names
 # of files included from system.h.  Exclude a couple.
 .re-list:
diff --git a/tests/df/df-output.sh b/tests/df/df-output.sh
index a10f2706b..a10f2706b 100644..100755
--- a/tests/df/df-output.sh
+++ b/tests/df/df-output.sh
diff --git a/tests/du/threshold.sh b/tests/du/threshold.sh
index ee5217dbc..ee5217dbc 100644..100755
--- a/tests/du/threshold.sh
+++ b/tests/du/threshold.sh
diff --git a/tests/factor/run.sh b/tests/factor/run.sh
index dfe116484..dfe116484 100644..100755
--- a/tests/factor/run.sh
+++ b/tests/factor/run.sh
diff --git a/tests/init.sh b/tests/init.sh
index bd2048e22..bd2048e22 100644..100755
--- a/tests/init.sh
+++ b/tests/init.sh
diff --git a/tests/misc/csplit-suppress-matched.pl b/tests/misc/csplit-suppress-matched.pl
index bfced423b..bfced423b 100644..100755
--- a/tests/misc/csplit-suppress-matched.pl
+++ b/tests/misc/csplit-suppress-matched.pl
diff --git a/tests/misc/numfmt.pl b/tests/misc/numfmt.pl
index 553f68b2b..553f68b2b 100644..100755
--- a/tests/misc/numfmt.pl
+++ b/tests/misc/numfmt.pl
diff --git a/tests/tail-2/retry.sh b/tests/tail-2/retry.sh
index 7ba773475..7ba773475 100644..100755
--- a/tests/tail-2/retry.sh
+++ b/tests/tail-2/retry.sh