From: James Bunton <jamesbunton@delx.net.au>
Date: Thu, 21 Mar 2013 11:09:11 +0000 (+1100)
Subject: Simple find-in-file tool
X-Git-Url: https://code.delx.au/monosys/commitdiff_plain/3800ad26e35363d4cdd8475b2c7b5eab54882065

Simple find-in-file tool
---

diff --git a/bin/find-in-file b/bin/find-in-file
new file mode 100755
index 0000000..3f80250
--- /dev/null
+++ b/bin/find-in-file
@@ -0,0 +1,32 @@
+#!/usr/bin/python
+
+import sys
+
+try:
+	needle = sys.argv[1]
+	haystack = sys.argv[2]
+except IndexError:
+	print >>sys.stderr, "Usage: %s needle haystack" % sys.argv[0]
+	sys.exit(1)
+
+
+f = open(needle)
+magic = f.read(1024)
+f.close()
+
+chunk_size = 32768
+f = open(haystack)
+count = 0
+buf = ""
+while True:
+	newbuf = f.read(chunk_size)
+	if not newbuf:
+		break
+	buf += newbuf
+	pos = buf.find(magic)
+	if pos >= 0:
+		print "found", count + pos
+	count += len(buf) - len(magic)
+	buf = buf[-len(magic):]
+f.close()
+