Add third_party/pexpect

third_party/pexpect/tests/platform_checks/check_read.py

+import os
+
+filename = os.tmpnam()
+print 'filename:', filename
+
+fd_out = os.open(filename, os.O_CREAT | os.O_WRONLY)
+print 'fd_out:', fd_out
+os.write (fd_out, 'This is a test.\n')
+os.close(fd_out)
+print
+print 'testing read on good fd...'
+fd_in = os.open (filename, os.O_RDONLY)
+print 'fd_in:', fd_in
+while 1:
+        data_in = os.read(fd_in, 1)
+        print 'data_in:', data_in
+        if data_in == '':
+                print 'data_in was empty'
+                break #sys.exit(1)
+os.close(fd_in)
+print
+print
+print 'testing read on closed fd...'
+fd_in = os.open ('test_read.py', os.O_RDONLY)
+print 'fd_in:', fd_in
+while 1:
+        data_in = os.read(fd_in, 1)
+        print 'data_in:', data_in
+        if data_in == '':
+                print 'data_in was empty'
+                break
+os.close(fd_in)
+d = os.read(fd_in, 1) # fd_in should be closed now...
+if s == '':
+        print 'd is empty. good.'