Bash - local - Variable declaration in function - (Builtin)

About

local variable scoping declaration inside a block or a function.

It is an error to use local when not within a function.

Syntax

local [option] [name[=value] ...]

• For each argument, a local variable named name is created, and assigned value.
• The option can be any of the options accepted by declare.

When local is used within a function, it causes the variable name to have a visible scope restricted to that function and its children.

With no operands, local writes a list of local variables to the standard output.

Return value

It is an error to use local when not within a function. The return status is 0 unless local is used outside a function, an invalid name is supplied, or name is a readonly variable.

Example

local pid base= user= nice= bg= pid_file=