win32: fix to file extension test

When looking for the special WIN32 file extensions only consider the
file's basename, not the full path.  Otherwise a file called '.bat',
for example, is considered executable by 'ls -a' and the shell tries
to run './.bat'.

1 files changed, 3 insertions, 2 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index 08d955527..3398e3df4 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -1164,11 +1164,12 @@ static const char win_suffix[4][4] = { "com", "exe", "bat", "cmd" };
 
 static int has_win_suffix(const char *name, int start)
 {
-        int i, len = strlen(name);
+        const char *bname = bb_basename(name);
+        int i, len = strlen(bname);
 
         if (len > 4 && name[len-4] == '.') {
                 for (i=start; i<4; ++i) {
-                        if (!strcasecmp(name+len-3, win_suffix[i])) {
+                        if (!strcasecmp(bname+len-3, win_suffix[i])) {
                                 return 1;
                         }
                 }