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$! 'f$verify(0)
$! --- protect against nonstandard definitions ---
$ perl_define = "define/nolog"
$ perl_on = "on error then exit $STATUS"
$ perl_exit = "exit"
$ perl_del = "delete"
$ pif = "if"
$! --- define i/o redirection (sys$output set by lib$spawn)
$ pif perl_popen_in .nes. "" then perl_define/user/name_attributes=confine sys$input 'perl_popen_in'
$ pif perl_popen_err .nes. "" then perl_define/user/name_attributes=confine sys$error 'perl_popen_err'
$ pif perl_popen_out .nes. "" then perl_define sys$output 'perl_popen_out'
$ cmd = perl_popen_cmd
$! --- get rid of global symbols
$ perl_del/symbol/global perl_popen_in
$ perl_del/symbol/global perl_popen_err
$ perl_del/symbol/global perl_popen_out
$ perl_del/symbol/global perl_popen_cmd
$ perl_on
$ 'cmd
$ perl_exit '$STATUS'
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