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Full Discussion: Tcl / expect need to attempt telnet if failed ssh
Top Forums Shell Programming and Scripting Tcl / expect need to attempt telnet if failed ssh Post 303028257 by Don Cragun on Wednesday 2nd of January 2019 09:28:33 PM
Old 01-02-2019
I haven't tried what you're trying to do before, but the syntax you're using mostly looks OK.

You haven't said what operating system you're using and that can make a difference for some versions of ssh. On most systems, the destination device has to follow the options, so there is a chance that it might work if you change:
Code:
#             -re "Connection refused|Connection timed out" { spawn ssh -o StrictHostKeyChecking=no $dev -l $unam }
             timeout { spawn ssh -o StrictHostKeyChecking=no $dev -l $unam
                     expect {
                            timeout { set err [ open "$hnam\_$dev.err" w ] ;
                                      puts $err "SSH timed out for $dev.\n";
                                      log_file ;
                                      exit; }

                             }

                     }
             }

to:
Code:
             -re "Connection refused|Connection timed out" {
                     spawn ssh -o StrictHostKeyChecking=no -l $unam $dev
                     expect {
                            timeout { 
                                      set err [ open "$hnam\_$dev.err" w ] ;
                                      puts $err "SSH timed out for $dev.\n";
                                      log_file ;
                                      exit;
                            }
                    }
             }
             timeout { spawn ssh -o StrictHostKeyChecking=no -l $unam $dev
                     expect {
                            timeout { set err [ open "$hnam\_$dev.err" w ] ;
                                      puts $err "SSH timed out for $dev.\n";
                                      log_file ;
                                      exit; }
                             }
                     }
             }

Obviously, this is totally untested. I would suggest that you turn on tcl's debugging output by including the -d option when you start it.
This User Gave Thanks to Don Cragun For This Post:
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LEARN ABOUT SUNOS

telnetrc

telnetrc(4)							   File Formats 						       telnetrc(4)

NAME

       telnetrc - file for telnet default options

DESCRIPTION

       The   .telnetrc	file  contains commands that are executed when a connection is established on a per-host basis. Each line in the file con-
       tains a host name, one or more spaces or tabs, and a telnet(1) command. The host name, DEFAULT, matches all hosts. Lines beginning with the
       pound  sign (#) are interpreted as comments and therefore ignored. telnet(1) commands are case-insensitive to the contents of the .telnetrc
       file.

       The  .telnetrc file is retrieved from each user's  HOME directory.

EXAMPLES

       Example 1: A sample file.

       In the following example, a .telnetrc file executes the telnet(1) command, toggle:

       weirdhost toggle crmod
       # Always export $PRINTER
       DEFAULT environ export PRINTER

       The lines in this file indicate that the toggle argument crmod, whose default value is "off" (or FALSE), should be enabled when	connecting
       to  the	system weirdhost. In addition, the value of the environment variable  PRINTER should be exported to all systems. In this case, the
       DEFAULT keyword is used in place of the host name.

FILES

       $HOME/.telnetrc

SEE ALSO

       telnet(1), in.telnetd(1M), environ(5)

SunOS 5.10							    9 Jan 1998							       telnetrc(4)
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