linux - Expect/TCL simple proc/variable issue -

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i have expect script works have attempted remove duplicate code , use proc string passed proc not seem getting used.

as first exposure tcl/expect basic variable passing/usage.

i had (worked):

    expect {         "condition" {}         timeout { various cleanup operations; send_user "a message"; exit 1 }     }

and changed (broken):

    proc exit_on_error {message} {         various cleanup operations         send_user "$message"         exit 1     }     expect {         "condition" {}         timeout { exit_on_error "a message" }     }

it cleanup operations , exits send_user seems have empty string

    send_user $message

complains wrong number of arguments.

bash expanding $message variable in here-doc before sending doc expect.

if not rely on using shell variables in expect script, single quote here-doc:

expect <<-'done'

otherwise, choose 1 of these options protect tcl variable expansion shell:

send_user \$message send_user [set message]

tcl not require quote variable: expands variable maintains value single word.


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