Cfrgtkky

Simple question, really...

Builtin?

What happens when you run: builtin?

The return type from echo $? is 0.

Which means that the command has most likely run successfully.

So, what does running builtin accomplish?

This is useful when you wish to reimplement a shell builtin
as a shell function, but need to execute the builtin within the function.

$ type echo

echo is a shell builtin



$ function echo(){ builtin echo "'$1'"; }



$ echo hi

'hi'

help builtin 

builtin: builtin [shell-builtin [arg ...]]
Execute shell builtins.

Execute SHELL-BUILTIN with arguments ARGs without performing command

lookup.  This is useful when you wish to reimplement a shell builtin

as a shell function, but need to execute the builtin within the function.



Exit Status:

Returns the exit status of SHELL-BUILTIN, or false if SHELL-BUILTIN is

not a shell builtin.

From help -m builtin:

NAME

    builtin - Execute shell builtins.



SYNOPSIS

    builtin [shell-builtin [arg ...]]



DESCRIPTION

    Execute shell builtins.



    Execute SHELL-BUILTIN with arguments ARGs without performing command

    lookup.  This is useful when you wish to reimplement a shell builtin

    as a shell function, but need to execute the builtin within the function.

Example usage:

cd (){

    builtin cd "$@"

    pwd

}

This cd's, then prints the new working directory (like in IPython). If you forget the builtin part, it will keep calling itself in an infinite loop.