1 files changed, 8 insertions, 0 deletions

diff --git a/pactest/util.py b/pactest/util.py
index 99d71e55..72777ca0 100755
--- a/pactest/util.py
+++ b/pactest/util.py
@@ -235,6 +235,14 @@ def diffmtime(mt1, mt2):
 # Miscellaneous
 #
 
+def which(filename):
+    path = os.environ["PATH"].split(':')
+    for p in path:
+        f = os.path.join(p, filename)
+        if os.access(f, os.F_OK):
+            return f
+    return None
+
 def grep(filename, pattern):
     lines = file(filename, 'r').readlines()
     for line in lines: