stat: make --format=%N honor the QUOTING_STYLE env var

* doc/coreutils.texi (stat invocation): Describe the
QUOTING_STYLE values now supported.
* src/stat.c (getenv_quoting_style): A new function called
from main, that sets the default quoting style for quotearg.
(main): Call getenv_quoting_style() when %N specified.
* tests/misc/stat-fmt.sh: Add a test case.
* NEWS: Mention the improvement.
Fixes http://bugs.gnu.org/23422

1 files changed, 14 insertions, 1 deletions

diff --git a/tests/misc/stat-fmt.sh b/tests/misc/stat-fmt.sh
index baa7ca775..1245ddb9e 100755
--- a/tests/misc/stat-fmt.sh
+++ b/tests/misc/stat-fmt.sh
@@ -20,11 +20,24 @@
 print_ver_ stat
 
 
-
+# ensure that stat properly handles a format string ending with %
 for i in $(seq 50); do
   fmt=$(printf "%${i}s" %)
   out=$(stat --form="$fmt" .)
   test "$out" = "$fmt" || fail=1
 done
 
+# ensure QUOTING_STYLE is honored by %N
+touch "'" || framework_failure_
+# Default since v8.25
+stat -c%N \' >> out || fail=1
+# Default before v8.25
+QUOTING_STYLE=locale stat -c%N \' >> out || fail=1
+cat <<\EOF >exp
+"'"
+'\''
+EOF
+compare exp out || fail=1
+
+
 Exit $fail