Description of problem:
rhn-channel is now able to accept user name and/or password interactively (bug 641029). However, when both the user name and the password are entered interactively, rhn-channel fails to alter the channel subscription. Even though I'm absolutely sure that I'm entering the right data.

Version-Release number of selected component (if applicable):
rhn-client-tools-0.4.20-56.el5

How reproducible:
Always

Steps to Reproduce:
e.g., # rhn-channel -r -c rhel-i386-server-5-sts
Username:
(not copied here)
Password:
Error validating data at server:

Error Message:
    Invalid username/password combination
Error Class Code: 2
Error Class Info:
     Invalid username and password combination.

Additional info:
The problem is here in the script:
    62      if not OPTIONS.user and not OPTIONS.list:
    63          print("Username: ")
    64          OPTIONS.user = sys.stdin.readline()

First of all, the prompt should stay on the same line, but that's not fatal. What makes rhn-channel fail is the fact that readline() keeps the new line character and sends the entered user name and the new line to RHN. The code should read:

if not OPTIONS.user and not OPTIONS.list:
    print "Username: ",
    OPTIONS.user = sys.stdin.readline().rstrip('\n')