12: Scripts
EMG™ Edge Management Gateway User Guide 254
Primary Commands
These are stand-alone commands which provide the primary functionality in a script. These
commands may rely on one or more of the Secondary Commands to provide values for some
parameters. The preprocessor will require that these commands appear only as the first element
of a command line. The start of a command line is delimited by any of the following:
The start of a new line of text in the script
A semicolon (';')
A left brace ('{')
Table 12-5 Primary Commands
Command Description
set
The
set command assigns a value to a variable. Syntax:
set <variable> <value>
where <variable> is a word, and <value> can be defined in one of the following
ways:
A quoted string
A word
A variable reference
A value generated via one of the string secondary commands (compare,
match, first, etc.)
A value generated via the expr secondary command
A value generated via the format secondary command
A value generated via the expr timestamp command
unset This command removes the definition of a variable within a script. Syntax:
unset <variable>
where
<variable> is a word.
scan
The
scan command is analogous to the C language scanf(). Syntax:
scan <variable> <format string> <value 1> <value 2> ... <value n>
where
<variable> a variable reference, and <format string> is a quoted
string. Each of the
<value x> elements will be a word.
sleep
The
sleep command suspends execution of the script (puts it to 'sleep') for the
specified number of seconds. Syntax:
sleep <value>
where
<value> can be a word, a quoted string or a variable reference.
exec
The
exec command executes a single CLI command. Currently only CLI 'show'
commands may be executed via exec. Syntax:
exec <CLI command>
send, send_user
The
send command sends output to a sub-process, The send_user
command sends output to the standard output. Both commands have the same
syntax:
send <string>
send_user <string>
where
<string> can be either a quoted string or a variable reference.
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