Expect script and show command capture problem.

Question

Hello everyone.
I want to capture the output of 'show interface status' to text files for our +600 switches.  Unfortunately, we have many old 2924's and other models running code prior to 12.0(21) that cannot support 'show command | redirect tftp....'  My hope was to use this command set and run it in an Expect script to capture this information on a daily basis.  Running the 'show interface status' in an Expect script is pretty easy, but I cannot see how to capture the show command output to a file for transfer to a server.  Has anyone else faced this problem and found a solution?
Thanks,

Answer 1

To write the "show" commands output to a text file in Expect/Tcl:
set filename "/path/to/output.file"
exp_send "show running\r"
set var $expect_out(buffer);
set fid [open ${filname} w+]
put $fid $var
close ${fid}
Large "show" output can often exceed the default size of $expect_out(buffer) however. This can be tuned accordingly:
http://wiki.tcl.tk/9407