Execute a shell command
Integer_Type system (String_Type cmd)
The system
function may be used to execute the string
expression cmd
in an inferior shell. This function is an
interface to the C system
function which returns an
implementation-defined result. On Linux, it returns 127 if the
inferior shell could not be invoked, -1 if there was some other
error, otherwise it returns the return code for cmd
.
define dir ()
{
() = system ("DIR");
}
displays a directory listing of the current directory under MSDOS or
VMS.