grep: fix echo "aa" | busybox grep -F -w "a" (should not match)

function                                             old     new   delta
grep_file                                           1461    1470      +9

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

2 files changed, 7 insertions, 1 deletions

diff --git a/findutils/grep.c b/findutils/grep.c
index fc6de4b69..88de0d4ef 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -352,7 +352,7 @@ static int grep_file(FILE *file)
                                                         goto opt_f_not_found;
                                         } else
                                         if (option_mask32 & OPT_w) {
-                                                char c = (match != str) ? match[-1] : ' ';
+                                                char c = (match != line) ? match[-1] : ' ';
                                                 if (!isalnum(c) && c != '_') {
                                                         c = match[strlen(gl->pattern)];
                                                         if (!c || (!isalnum(c) && c != '_'))
diff --git a/testsuite/grep.tests b/testsuite/grep.tests
index ed4ba455e..d0b0d2767 100755
--- a/testsuite/grep.tests
+++ b/testsuite/grep.tests
@@ -165,6 +165,12 @@ testing "grep -w word doesn't match wordword" \
         "wordword\n" \
         ""
 
+testing "grep -F -w w doesn't match ww" \
+        "grep -F -w w input" \
+        "" \
+        "ww\n" \
+        ""
+
 testing "grep -w word match second word" \
         "grep -w word input" \
         "bword,word\n""wordb,word\n""bwordb,word\n" \