From 97dddba1bbb91dcf538cfae1ea5b0bf16fc0468c Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Wed, 18 Dec 1991 13:39:16 +0000
Subject: Better check to avoid executables.

---
 Tools/scripts/xxci.py | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/Tools/scripts/xxci.py b/Tools/scripts/xxci.py
index 253ad2d..ef4ff11 100755
--- a/Tools/scripts/xxci.py
+++ b/Tools/scripts/xxci.py
@@ -11,6 +11,8 @@ import stat
 import path
 import commands
 
+EXECMAGIC = '\001\140\000\010'
+
 MAXSIZE = 200*1024 # Files this big must be binaries and are skipped.
 
 def getargs():
@@ -30,7 +32,8 @@ def getargs():
 badnames = ['tags', 'TAGS', 'xyzzy', 'nohup.out', 'core']
 badprefixes = ['.', ',', '@', '#', 'o.']
 badsuffixes = \
-	['~', '.a', '.o', '.old', '.bak', '.orig', '.new', '.prev', '.not']
+	['~', '.a', '.o', '.old', '.bak', '.orig', '.new', '.prev', '.not', \
+	 '.pyc', '.elc']
 # XXX Should generalize even more to use fnmatch!
 
 def skipfile(file):
@@ -43,7 +46,14 @@ def skipfile(file):
 		st = posix.stat(file)
 	except posix.error:
 		return 1 # Doesn't exist -- skip it
-	return st[stat.ST_SIZE] >= MAXSIZE
+	if st[stat.ST_SIZE] >= MAXSIZE: return 1
+	# Skip executables
+	try:
+		data = open(file, 'r').read(len(EXECMAGIC))
+		if data = EXECMAGIC: return 1
+	except:
+		pass
+	return 0
 
 def badprefix(file):
 	for bad in badprefixes:
-- 
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