Hi!

About two years ago I wrote some Perl program using Expect to automatically log in via SSH; it was based on v1.21.

Today I ran the program again (now at v1.32), and the program does not work as expected:

I'm waiting for a password prompt, then the user should type the password. The regex matches, but the after-match string (that should be empty) has unexpected contents.

Here is the essential part of the debug output:

spawn id(3): Does `***************************************************
+***************************\r\n* This login banner can be configured 
+to adhere to your corporate security   *\r\n* policies.              
+                                                    *\r\n*           
+                                                                 *\r\
+n* Due to security concerns, default users will be prompted to change
+ default *\r\n* passwords upon login. To retain the default password,
+ re-enter it at the   *\r\n* Password: and Confirm: prompts.         
+                                   *\r\n*                            
+                                                *\r\n****************
+**************************************************************\r\n\r\
+nPassword: '
match:
  pattern #1: -re `^Password: $'? YES!!
    Before match string: `********************************************
+**********************************\r\n* This login banner can be conf
+igured to adhere to your corporate security   *\r\n* policies.       
+                                                           *\r\n*    
+                                                                     
+   *\r\n* Due to security concerns, default users will be prompted to
+ change default *\r\n* passwords upon login. To retain the default pa
+ssword, re-enter it at the   *\r\n* '
    Match string: `Password: '
    After match string: `and Confirm: prompts.                        
+                    *\r\n*                                           
+                                 *\r\n*******************************
+***********************************************\r\n\r\nPassword: '
    Matchlist: ()

[download]

As you can see "Password:" is not matched at the beginning of the line as expected (despite of saying differently); at least the after string behaves as if the "Password:" was matched in the middle of a line.

To me it seems the version of Expect.pm is broken; see also https://bugzilla.opensuse.org/show_bug.cgi?id=976535

In reply to Unexpected after-match with Expect by CharLee

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