grep: fix two bugs with -w

Unfortunately, with !EXTRA_COMPAT, "grep -w ^str" still erroneously matches "strstr".

function                                             old     new   delta
grep_file                                           1499    1510     +11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/testsuite/grep.tests b/testsuite/grep.tests
index 64d99a905..412efffbb 100755
--- a/testsuite/grep.tests
+++ b/testsuite/grep.tests
@@ -147,6 +147,18 @@ testing "grep -w doesn't stop on 1st mismatch" \
         "foop foo\n" \
         ""
 
+testing "grep -w ^str doesn't match str not at the beginning" \
+        "grep -w ^str input" \
+        "" \
+        "strstr\n" \
+        ""
+
+testing "grep -w ^ doesn't hang" \
+        "grep -w ^ input" \
+        "" \
+        "anything\n" \
+        ""
+
 # testing "test name" "commands" "expected result" "file input" "stdin"
 #   file input will be file called "input"
 #   test can create a file "actual" instead of writing to stdout