new files

Lib/popen2.py

@@ -0,0 +1,35 @@
+import os
+import sys
+import string
+
+MAXFD = 100	# Max number of file descriptors (os.getdtablesize()???)
+
+def popen2(cmd):
+	cmd = string.split(cmd)
+	p2cread, p2cwrite = os.pipe()
+	c2pread, c2pwrite = os.pipe()
+	pid = os.fork()
+	if pid == 0:
+		# Child
+		os.close(0)
+		os.close(1)
+		if os.dup(p2cread) <> 0:
+			sys.stderr.write('popen2: bad read dup\n')
+		if os.dup(c2pwrite) <> 1:
+			sys.stderr.write('popen2: bad write dup\n')
+		for i in range(3, MAXFD):
+			try:
+				os.close(i)
+			except:
+				pass
+		try:
+			os.execv(cmd[0], cmd)
+		finally:
+			os._exit(1)
+		# Shouldn't come here, I guess
+		os._exit(1)
+	os.close(p2cread)
+	tochild = os.fdopen(p2cwrite, 'w')
+	os.close(c2pwrite)
+	fromchild = os.fdopen(c2pread, 'r')
+	return fromchild, tochild