From 5b8900267ff93688fad2a7ab0b25dc57b42ea9e7 Mon Sep 17 00:00:00 2001
From: Paul Eggert <address@hidden>
Date: Sat, 19 Nov 2016 01:02:08 -0800
Subject: [PATCH 09/10] grep -f /dev/null -L PAT FILE outputs FILE

* NEWS: Document this.
* src/grep.c (main): Do not exit right away with -L.
* tests/skip-read: Test for the fix.
---
 NEWS            |  2 ++
 src/grep.c      |  5 +++--
 tests/skip-read | 13 +++++++++++--
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/NEWS b/NEWS
index 06a186a..29a0e8d 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,8 @@ GNU grep NEWS                                    -*- outline -*-
   more cautious about special patterns like (?-m) and (*FAIL).
   [bug introduced in grep-2.23]
 
+  grep -m0 -L PAT FILE now outputs "FILE".  [bug introduced in grep-2.5]
+
   grep's use of getprogname no longer causes a build failure on HP-UX.
 
 ** Improvements
diff --git a/src/grep.c b/src/grep.c
index 066df8c..a794af4 100644
--- a/src/grep.c
+++ b/src/grep.c
@@ -2818,8 +2818,9 @@ main (int argc, char **argv)
 
   /* If it is easy to see that matching cannot succeed (e.g., 'grep -f
      /dev/null'), fail without reading the input.  */
-  if (max_count == 0
-      || (keycc == 0 && out_invert && !match_lines && !match_words))
+  if ((max_count == 0
+       || (keycc == 0 && out_invert && !match_lines && !match_words))
+      && list_files != LISTFILES_NONMATCHING)
     return EXIT_FAILURE;
 
   if (color_option == 2)
diff --git a/tests/skip-read b/tests/skip-read
index 627d362..1eef87e 100755
--- a/tests/skip-read
+++ b/tests/skip-read
@@ -5,11 +5,20 @@
 
 fail=0
 
+echo /dev/null >exp || framework_failure_
+
 for opts in '-m0 y' '-f /dev/null' '-v ""'; do
   for matcher in '' -E -F; do
-    eval returns_ 1 grep $opts $matcher no-such-file > out || fail=1
-    compare /dev/null out || fail=1
+    for file in /dev/null no-such-file; do
+      eval returns_ 1 grep $opts $matcher no-such-file > out || fail=1
+      compare /dev/null out || fail=1
+      eval returns_ 1 grep -l $opts $matcher /dev/null > out || fail=1
+      compare /dev/null out || fail=1
+    done
+    eval returns_ 1 grep -L $opts $matcher /dev/null > out || fail=1
+    compare exp out || fail=1
   done
 done
 
+
 Exit $fail
-- 
2.7.4