2 $! --- protect against nonstandard definitions ---
3 $ perl_define = "define/nolog"
4 $ perl_on = "on error then exit $STATUS"
8 $! --- define i/o redirection (sys$output set by lib$spawn)
9 $ pif perl_popen_in .nes. "" then perl_define/user/name_attributes=confine sys$input 'perl_popen_in'
10 $ pif perl_popen_err .nes. "" then perl_define/user/name_attributes=confine sys$error 'perl_popen_err'
11 $ pif perl_popen_out .nes. "" then perl_define sys$output 'perl_popen_out'
12 $! --- build command line to get max possible length