NAME
    caller - Return the context of the current subroutine call.

SYNOPSIS
    caller [expr]

DESCRIPTION
    Return the context of the current subroutine call.
    
    Without EXPR, returns "$line $filename".  With EXPR, returns
    "$line $subroutine $filename"; this extra information can be used to
    provide a stack trace.
    
    The value of EXPR indicates how many call frames to go back before the
    current one; the top frame is frame 0.
    
    Exit Status:
    Returns 0 unless the shell is not executing a shell function or EXPR
    is invalid.

SEE ALSO
    bash(1)

IMPLEMENTATION
    GNU bash, version 5.0.17(1)-release (x86_64-redhat-linux-gnu)
    Copyright (C) 2019 Free Software Foundation, Inc.
    License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>