X-Git-Url: http://club.cc.cmu.edu/~cmccabe/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pickrand.py;h=688460a136ded9b55492e438b71f0898bd3c6b9d;hb=2d3ef1c886d1832709dcaec12ed6b6b06189b9fc;hp=8253e74a1f6c50102aae0bc2cafb73a0b706e16d;hpb=17f7ddbe7d6b37982cf03c10330f66cff9b355cc;p=cmccabe-bin

diff --git a/pickrand.py b/pickrand.py
index 8253e74..688460a 100755
--- a/pickrand.py
+++ b/pickrand.py
@@ -3,15 +3,29 @@
 import os
 import random
 import sys
+import time
 
-allfiles = []
+print_to_stderr = False
+random.seed(os.getpid() + int(time.time()))
 
-for root, dirs, files in os.walk(".", followlinks=True):
-    for f in files:
-        allfiles.append(os.path.join(root, f))
-if (len(allfiles) == 0):
-   sys.exit(1)
-random.seed(None)
-r = random.randint(0,len(allfiles)) 
-print(allfiles[r])
+file_name = None
+if (len(sys.argv) == 1):
+    allfiles = []
+    for root, dirs, files in os.walk("."):
+        for f in files:
+            allfiles.append(os.path.join(root, f))
+    if (len(allfiles) == 0):
+       sys.exit(1)
+    r = random.randint(0,len(allfiles) - 1)
+    file_name = allfiles[r]
+elif (len(sys.argv) == 2) and (sys.argv[1] == "-S"):
+    print_to_stderr = True
+else:
+    allfiles = sys.argv[1:]
+    r = random.randint(0,len(allfiles) - 1)
+    file_name = allfiles[r]
+
+print(file_name)
+if (print_to_stderr):
+    print >>sys.stderr, file_name
 sys.exit(0)